From 486aa8f5bdd16ccc60d208fa7f590cdd5fe065b2 Mon Sep 17 00:00:00 2001
From: John Kerl <kerl.john.r@gmail.com>
Date: Wed, 15 Jun 2016 21:50:54 -0400
Subject: [PATCH] ast-print wording change (bigdiff for regtest expected-output
 file)

---
 c/containers/mlr_dsl_ast.c |    2 +-
 c/reg_test/expected/out    | 7114 ++++++++++++++++++------------------
 2 files changed, 3558 insertions(+), 3558 deletions(-)

diff --git a/c/containers/mlr_dsl_ast.c b/c/containers/mlr_dsl_ast.c
index c3abcc6df..f86be3a51 100644
--- a/c/containers/mlr_dsl_ast.c
+++ b/c/containers/mlr_dsl_ast.c
@@ -122,7 +122,7 @@ static void mlr_dsl_ast_node_print_aux(mlr_dsl_ast_node_t* pnode, int level, FIL
 		return;
 	for (int i = 0; i < level; i++)
 		fprintf(o, "    ");
-	fprintf(o, "%s (%s)%s\n",
+	fprintf(o, "text=\"%s\", type=%s%s\n",
 		pnode->text,
 		mlr_dsl_ast_node_describe_type(pnode->type),
 		(pnode->pchildren != NULL) ? ":" : ".");
diff --git a/c/reg_test/expected/out b/c/reg_test/expected/out
index 17bb019bc..be5e49898 100644
--- a/c/reg_test/expected/out
+++ b/c/reg_test/expected/out
@@ -5858,1293 +5858,1293 @@ DSL OPERATOR ASSOCIATIVITY
 
 mlr put -v $x = 1 || 2 || 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        || (operator):
-            || (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="||", type=operator:
+            text="||", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 || 2 || 3 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        || (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="||", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ^^ 2 ^^ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ^^ (operator):
-            ^^ (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="^^", type=operator:
+            text="^^", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ^^ 2 ^^ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    ^^ (operator):
-        ^^ (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="^^", type=operator:
+        text="^^", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 && 2 && 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        && (operator):
-            && (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="&&", type=operator:
+            text="&&", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 && 2 && 3 /dev/null
 AST ROOT:
-list (statement_list):
-    && (operator):
-        && (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="&&", type=operator:
+        text="&&", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  == 2  == 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        == (operator):
-            == (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="==", type=operator:
+            text="==", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  == 2  == 3 /dev/null
 AST ROOT:
-list (statement_list):
-    == (operator):
-        == (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="==", type=operator:
+        text="==", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  != 2  != 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        != (operator):
-            != (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="!=", type=operator:
+            text="!=", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  != 2  != 3 /dev/null
 AST ROOT:
-list (statement_list):
-    != (operator):
-        != (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="!=", type=operator:
+        text="!=", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  =~ 2  =~ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        =~ (operator):
-            =~ (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="=~", type=operator:
+            text="=~", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  =~ 2  =~ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        =~ (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="=~", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 !=~ 2 !=~ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        !=~ (operator):
-            !=~ (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="!=~", type=operator:
+            text="!=~", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 !=~ 2 !=~ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    !=~ (operator):
-        !=~ (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="!=~", type=operator:
+        text="!=~", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  == 2  != 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        != (operator):
-            == (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="!=", type=operator:
+            text="==", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  == 2  != 3 /dev/null
 AST ROOT:
-list (statement_list):
-    != (operator):
-        == (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="!=", type=operator:
+        text="==", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  != 2  == 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        == (operator):
-            != (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="==", type=operator:
+            text="!=", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  != 2  == 3 /dev/null
 AST ROOT:
-list (statement_list):
-    == (operator):
-        != (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="==", type=operator:
+        text="!=", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  <  2  <  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        < (operator):
-            < (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="<", type=operator:
+            text="<", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  <  2  <  3 /dev/null
 AST ROOT:
-list (statement_list):
-    < (operator):
-        < (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="<", type=operator:
+        text="<", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  <= 2  <= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        <= (operator):
-            <= (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="<=", type=operator:
+            text="<=", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  <= 2  <= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    <= (operator):
-        <= (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="<=", type=operator:
+        text="<=", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  >  2  >  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        > (operator):
-            > (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text=">", type=operator:
+            text=">", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  >  2  >  3 /dev/null
 AST ROOT:
-list (statement_list):
-    > (operator):
-        > (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text=">", type=operator:
+        text=">", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  >= 2  >= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        >= (operator):
-            >= (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text=">=", type=operator:
+            text=">=", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  >= 2  >= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    >= (operator):
-        >= (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text=">=", type=operator:
+        text=">=", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  <  2  <= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        <= (operator):
-            < (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="<=", type=operator:
+            text="<", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  <  2  <= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    <= (operator):
-        < (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="<=", type=operator:
+        text="<", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  <= 2  <  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        < (operator):
-            <= (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="<", type=operator:
+            text="<=", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  <= 2  <  3 /dev/null
 AST ROOT:
-list (statement_list):
-    < (operator):
-        <= (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="<", type=operator:
+        text="<=", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 |  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            | (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="|", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 |  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        | (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="|", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ^  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ^ (operator):
-            ^ (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="^", type=operator:
+            text="^", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ^  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    ^ (operator):
-        ^ (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="^", type=operator:
+        text="^", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 &  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        & (operator):
-            & (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="&", type=operator:
+            text="&", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 &  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    & (operator):
-        & (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="&", type=operator:
+        text="&", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 |  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            1 (strnum_literal).
-            & (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="1", type=strnum_literal.
+            text="&", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 |  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        1 (strnum_literal).
-        & (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="1", type=strnum_literal.
+        text="&", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 |  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            1 (strnum_literal).
-            ^ (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="1", type=strnum_literal.
+            text="^", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 |  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        1 (strnum_literal).
-        ^ (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="1", type=strnum_literal.
+        text="^", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ^  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            ^ (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="^", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ^  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        ^ (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="^", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ^  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ^ (operator):
-            1 (strnum_literal).
-            & (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="^", type=operator:
+            text="1", type=strnum_literal.
+            text="&", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 ^  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    ^ (operator):
-        1 (strnum_literal).
-        & (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="^", type=operator:
+        text="1", type=strnum_literal.
+        text="&", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 &  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            & (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="&", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 &  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        & (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="&", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 &  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ^ (operator):
-            & (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="^", type=operator:
+            text="&", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 &  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    ^ (operator):
-        & (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="^", type=operator:
+        text="&", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  << 2  << 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        << (operator):
-            << (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="<<", type=operator:
+            text="<<", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  << 2  << 3 /dev/null
 AST ROOT:
-list (statement_list):
-    << (operator):
-        << (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="<<", type=operator:
+        text="<<", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  >> 2  >> 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        >> (operator):
-            >> (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text=">>", type=operator:
+            text=">>", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  >> 2  >> 3 /dev/null
 AST ROOT:
-list (statement_list):
-    >> (operator):
-        >> (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text=">>", type=operator:
+        text=">>", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  << 2  >> 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        >> (operator):
-            << (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text=">>", type=operator:
+            text="<<", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  << 2  >> 3 /dev/null
 AST ROOT:
-list (statement_list):
-    >> (operator):
-        << (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text=">>", type=operator:
+        text="<<", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1  >> 2  << 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        << (operator):
-            >> (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="<<", type=operator:
+            text=">>", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1  >> 2  << 3 /dev/null
 AST ROOT:
-list (statement_list):
-    << (operator):
-        >> (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="<<", type=operator:
+        text=">>", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 + 2 + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            + (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="+", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 + 2 + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        + (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 - 2 - 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        - (operator):
-            - (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="-", type=operator:
+            text="-", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 - 2 - 3 /dev/null
 AST ROOT:
-list (statement_list):
-    - (operator):
-        - (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="-", type=operator:
+        text="-", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 + 2 - 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        - (operator):
-            + (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="-", type=operator:
+            text="+", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 + 2 - 3 /dev/null
 AST ROOT:
-list (statement_list):
-    - (operator):
-        + (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="-", type=operator:
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 - 2 + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            - (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="-", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 - 2 + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        - (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="-", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 . 2 . 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        . (operator):
-            . (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text=".", type=operator:
+            text=".", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 . 2 . 3 /dev/null
 AST ROOT:
-list (statement_list):
-    . (operator):
-        . (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text=".", type=operator:
+        text=".", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 * 2 * 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            * (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 * 2 * 3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        * (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 / 2 / 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        / (operator):
-            / (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="/", type=operator:
+            text="/", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 / 2 / 3 /dev/null
 AST ROOT:
-list (statement_list):
-    / (operator):
-        / (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="/", type=operator:
+        text="/", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 // 2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        // (operator):
-            // (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="//", type=operator:
+            text="//", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 // 2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    // (operator):
-        // (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="//", type=operator:
+        text="//", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 % 2 % 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        % (operator):
-            % (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="%", type=operator:
+            text="%", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 % 2 % 3 /dev/null
 AST ROOT:
-list (statement_list):
-    % (operator):
-        % (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="%", type=operator:
+        text="%", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ** 2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ** (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 ** 2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    ** (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="**", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 *  2 /  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        / (operator):
-            * (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="/", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 *  2 /  3 /dev/null
 AST ROOT:
-list (statement_list):
-    / (operator):
-        * (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="/", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 *  2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        // (operator):
-            * (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="//", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 *  2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    // (operator):
-        * (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="//", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 *  2 %  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        % (operator):
-            * (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="%", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 *  2 %  3 /dev/null
 AST ROOT:
-list (statement_list):
-    % (operator):
-        * (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="%", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 *  2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 *  2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 /  2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            / (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="/", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 /  2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        / (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="/", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 /  2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        // (operator):
-            / (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="//", type=operator:
+            text="/", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 /  2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    // (operator):
-        / (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="//", type=operator:
+        text="/", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 /  2 %  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        % (operator):
-            / (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="%", type=operator:
+            text="/", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 /  2 %  3 /dev/null
 AST ROOT:
-list (statement_list):
-    % (operator):
-        / (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="%", type=operator:
+        text="/", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 /  2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        / (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="/", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 /  2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    / (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="/", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 // 2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            // (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="//", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 // 2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        // (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="//", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 // 2 /  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        / (operator):
-            // (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="/", type=operator:
+            text="//", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 // 2 /  3 /dev/null
 AST ROOT:
-list (statement_list):
-    / (operator):
-        // (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="/", type=operator:
+        text="//", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 // 2 %  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        % (operator):
-            // (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="%", type=operator:
+            text="//", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 // 2 %  3 /dev/null
 AST ROOT:
-list (statement_list):
-    % (operator):
-        // (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="%", type=operator:
+        text="//", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 // 2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        // (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="//", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 // 2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    // (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="//", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 %  2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            % (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="%", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 %  2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        % (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="%", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 %  2 /  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        / (operator):
-            % (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="/", type=operator:
+            text="%", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 %  2 /  3 /dev/null
 AST ROOT:
-list (statement_list):
-    / (operator):
-        % (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="/", type=operator:
+        text="%", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 %  2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        // (operator):
-            % (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="//", type=operator:
+            text="%", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 %  2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    // (operator):
-        % (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="//", type=operator:
+        text="%", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 %  2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        % (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="%", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 %  2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    % (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="%", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ** 2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            ** (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="**", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ** 2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        ** (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ** 2 /  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        / (operator):
-            ** (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="/", type=operator:
+            text="**", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ** 2 /  3 /dev/null
 AST ROOT:
-list (statement_list):
-    / (operator):
-        ** (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="/", type=operator:
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ** 2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        // (operator):
-            ** (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="//", type=operator:
+            text="**", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ** 2 // 3 /dev/null
 AST ROOT:
-list (statement_list):
-    // (operator):
-        ** (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="//", type=operator:
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ** 2 %  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        % (operator):
-            ** (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="%", type=operator:
+            text="**", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ** 2 %  3 /dev/null
 AST ROOT:
-list (statement_list):
-    % (operator):
-        ** (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="%", type=operator:
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = ++1 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            + (operator):
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="+", type=operator:
+                text="1", type=strnum_literal.
 
 mlr filter -v      ++1 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        + (operator):
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="+", type=operator:
+            text="1", type=strnum_literal.
 
 mlr put -v $x = --1 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        - (operator):
-            - (operator):
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="-", type=operator:
+            text="-", type=operator:
+                text="1", type=strnum_literal.
 
 mlr filter -v      --1 /dev/null
 AST ROOT:
-list (statement_list):
-    - (operator):
-        - (operator):
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="-", type=operator:
+        text="-", type=operator:
+            text="1", type=strnum_literal.
 
 mlr put -v $x = !!1 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ! (operator):
-            ! (operator):
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="!", type=operator:
+            text="!", type=operator:
+                text="1", type=strnum_literal.
 
 mlr filter -v      !!1 /dev/null
 AST ROOT:
-list (statement_list):
-    ! (operator):
-        ! (operator):
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="!", type=operator:
+        text="!", type=operator:
+            text="1", type=strnum_literal.
 
 mlr put -v $x = ~~1 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ~ (operator):
-            ~ (operator):
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="~", type=operator:
+            text="~", type=operator:
+                text="1", type=strnum_literal.
 
 mlr filter -v      ~~1 /dev/null
 AST ROOT:
-list (statement_list):
-    ~ (operator):
-        ~ (operator):
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="~", type=operator:
+        text="~", type=operator:
+            text="1", type=strnum_literal.
 
 mlr put -v $x = 1 ? 2 : 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ? : (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="? :", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ? 2 : 3 /dev/null
 AST ROOT:
-list (statement_list):
-    ? : (operator):
-        1 (strnum_literal).
-        2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="? :", type=operator:
+        text="1", type=strnum_literal.
+        text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ? 2 ? 3 : 4 : 5 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ? : (operator):
-            1 (strnum_literal).
-            ? : (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
-                4 (strnum_literal).
-            5 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="? :", type=operator:
+            text="1", type=strnum_literal.
+            text="? :", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
+                text="4", type=strnum_literal.
+            text="5", type=strnum_literal.
 
 mlr filter -v      1 ? 2 ? 3 : 4 : 5 /dev/null
 AST ROOT:
-list (statement_list):
-    ? : (operator):
-        1 (strnum_literal).
-        ? : (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
-            4 (strnum_literal).
-        5 (strnum_literal).
+text="list", type=statement_list:
+    text="? :", type=operator:
+        text="1", type=strnum_literal.
+        text="? :", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
+            text="4", type=strnum_literal.
+        text="5", type=strnum_literal.
 
 mlr put -v $x = 1 ? 2 : 3 ? 4 : 5 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ? : (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-            ? : (operator):
-                3 (strnum_literal).
-                4 (strnum_literal).
-                5 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="? :", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+            text="? :", type=operator:
+                text="3", type=strnum_literal.
+                text="4", type=strnum_literal.
+                text="5", type=strnum_literal.
 
 mlr filter -v      1 ? 2 : 3 ? 4 : 5 /dev/null
 AST ROOT:
-list (statement_list):
-    ? : (operator):
-        1 (strnum_literal).
-        2 (strnum_literal).
-        ? : (operator):
-            3 (strnum_literal).
-            4 (strnum_literal).
-            5 (strnum_literal).
+text="list", type=statement_list:
+    text="? :", type=operator:
+        text="1", type=strnum_literal.
+        text="2", type=strnum_literal.
+        text="? :", type=operator:
+            text="3", type=strnum_literal.
+            text="4", type=strnum_literal.
+            text="5", type=strnum_literal.
 
 
 ================================================================
@@ -7152,1363 +7152,1363 @@ DSL OPERATOR PRECEDENCE
 
 mlr put -v $x = 1 || 2 ^^ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        || (operator):
-            1 (strnum_literal).
-            ^^ (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="||", type=operator:
+            text="1", type=strnum_literal.
+            text="^^", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 || 2 ^^ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        1 (strnum_literal).
-        ^^ (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="1", type=strnum_literal.
+        text="^^", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 || 2 && 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        || (operator):
-            1 (strnum_literal).
-            && (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="||", type=operator:
+            text="1", type=strnum_literal.
+            text="&&", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 || 2 && 3 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        1 (strnum_literal).
-        && (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="1", type=strnum_literal.
+        text="&&", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ^^ 2 || 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        || (operator):
-            ^^ (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="||", type=operator:
+            text="^^", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 ^^ 2 || 3 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        ^^ (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="^^", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 ^^ 2 && 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ^^ (operator):
-            1 (strnum_literal).
-            && (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="^^", type=operator:
+            text="1", type=strnum_literal.
+            text="&&", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      1 ^^ 2 && 3 /dev/null
 AST ROOT:
-list (statement_list):
-    ^^ (operator):
-        1 (strnum_literal).
-        && (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="^^", type=operator:
+        text="1", type=strnum_literal.
+        text="&&", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = 1 && 2 || 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        || (operator):
-            && (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="||", type=operator:
+            text="&&", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 && 2 || 3 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        && (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="&&", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = 1 && 2 ^^ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ^^ (operator):
-            && (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="^^", type=operator:
+            text="&&", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      1 && 2 ^^ 3 /dev/null
 AST ROOT:
-list (statement_list):
-    ^^ (operator):
-        && (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="^^", type=operator:
+        text="&&", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 == 2 <= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        == (operator):
-            1 (strnum_literal).
-            <= (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="==", type=operator:
+            text="1", type=strnum_literal.
+            text="<=", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 == 2 <= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    == (operator):
-        1 (strnum_literal).
-        <= (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="==", type=operator:
+        text="1", type=strnum_literal.
+        text="<=", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 <= 2 == 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        == (operator):
-            <= (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="==", type=operator:
+            text="<=", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 <= 2 == 3 /dev/null
 AST ROOT:
-list (statement_list):
-    == (operator):
-        <= (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="==", type=operator:
+        text="<=", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 <= 2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        <= (operator):
-            1 (strnum_literal).
-            | (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="<=", type=operator:
+            text="1", type=strnum_literal.
+            text="|", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 <= 2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    <= (operator):
-        1 (strnum_literal).
-        | (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="<=", type=operator:
+        text="1", type=strnum_literal.
+        text="|", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 |  2 <= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        <= (operator):
-            | (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="<=", type=operator:
+            text="|", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 |  2 <= 3 /dev/null
 AST ROOT:
-list (statement_list):
-    <= (operator):
-        | (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="<=", type=operator:
+        text="|", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 |  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            1 (strnum_literal).
-            ^ (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="1", type=strnum_literal.
+            text="^", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 |  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        1 (strnum_literal).
-        ^ (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="1", type=strnum_literal.
+        text="^", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 ^  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            ^ (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="^", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 ^  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        ^ (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="^", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 ^  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ^ (operator):
-            1 (strnum_literal).
-            & (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="^", type=operator:
+            text="1", type=strnum_literal.
+            text="&", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 ^  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    ^ (operator):
-        1 (strnum_literal).
-        & (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="^", type=operator:
+        text="1", type=strnum_literal.
+        text="&", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 &  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ^ (operator):
-            & (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="^", type=operator:
+            text="&", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 &  2 ^  3 /dev/null
 AST ROOT:
-list (statement_list):
-    ^ (operator):
-        & (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="^", type=operator:
+        text="&", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 &  2 << 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        & (operator):
-            1 (strnum_literal).
-            << (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="&", type=operator:
+            text="1", type=strnum_literal.
+            text="<<", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 &  2 << 3 /dev/null
 AST ROOT:
-list (statement_list):
-    & (operator):
-        1 (strnum_literal).
-        << (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="&", type=operator:
+        text="1", type=strnum_literal.
+        text="<<", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 << 2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        & (operator):
-            << (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="&", type=operator:
+            text="<<", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 << 2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    & (operator):
-        << (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="&", type=operator:
+        text="<<", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 +  2 * 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            1 (strnum_literal).
-            * (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="*", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 +  2 * 3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        1 (strnum_literal).
-        * (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="1", type=strnum_literal.
+        text="*", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 *  2 + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            * (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 *  2 + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        * (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 + (2 * 3) /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            1 (strnum_literal).
-            * (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="*", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 + (2 * 3) /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        1 (strnum_literal).
-        * (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="1", type=strnum_literal.
+        text="*", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 * (2 + 3) /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            1 (strnum_literal).
-            + (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="+", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 * (2 + 3) /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        1 (strnum_literal).
-        + (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="1", type=strnum_literal.
+        text="+", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = (1 + 2) * 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            + (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="+", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      (1 + 2) * 3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        + (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = (1 * 2) + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            * (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      (1 * 2) + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        * (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 +   2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 +   2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 **  2 +  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            ** (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="**", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 **  2 +  3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        ** (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 +  (2 ** 3) /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 +  (2 ** 3) /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 ** (2 +  3) /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ** (operator):
-            1 (strnum_literal).
-            + (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="+", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 ** (2 +  3) /dev/null
 AST ROOT:
-list (statement_list):
-    ** (operator):
-        1 (strnum_literal).
-        + (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="**", type=operator:
+        text="1", type=strnum_literal.
+        text="+", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = (1 +  2) ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ** (operator):
-            + (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="**", type=operator:
+            text="+", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      (1 +  2) ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    ** (operator):
-        + (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="**", type=operator:
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = (1 ** 2) +  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            ** (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="**", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      (1 ** 2) +  3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        ** (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 *   2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 *   2 ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 **  2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            ** (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="**", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 **  2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        ** (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 *  (2 ** 3) /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            1 (strnum_literal).
-            ** (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="**", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 *  (2 ** 3) /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        1 (strnum_literal).
-        ** (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="1", type=strnum_literal.
+        text="**", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 ** (2 *  3) /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ** (operator):
-            1 (strnum_literal).
-            * (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="*", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 ** (2 *  3) /dev/null
 AST ROOT:
-list (statement_list):
-    ** (operator):
-        1 (strnum_literal).
-        * (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="**", type=operator:
+        text="1", type=strnum_literal.
+        text="*", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = (1 *  2) ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ** (operator):
-            * (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="**", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      (1 *  2) ** 3 /dev/null
 AST ROOT:
-list (statement_list):
-    ** (operator):
-        * (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="**", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = (1 ** 2) *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        * (operator):
-            ** (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="*", type=operator:
+            text="**", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      (1 ** 2) *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    * (operator):
-        ** (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="*", type=operator:
+        text="**", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x = -1 +  2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            - (operator):
-                1 (strnum_literal).
-            * (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="-", type=operator:
+                text="1", type=strnum_literal.
+            text="*", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      -1 +  2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        - (operator):
-            1 (strnum_literal).
-        * (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="-", type=operator:
+            text="1", type=strnum_literal.
+        text="*", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = -1 *  2 +  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            * (operator):
-                - (operator):
-                    1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="*", type=operator:
+                text="-", type=operator:
+                    text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      -1 *  2 +  3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        * (operator):
-            - (operator):
-                1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="*", type=operator:
+            text="-", type=operator:
+                text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 + -2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            1 (strnum_literal).
-            * (operator):
-                - (operator):
-                    2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="*", type=operator:
+                text="-", type=operator:
+                    text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 + -2 *  3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        1 (strnum_literal).
-        * (operator):
-            - (operator):
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="1", type=strnum_literal.
+        text="*", type=operator:
+            text="-", type=operator:
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 * -2 +  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            * (operator):
-                1 (strnum_literal).
-                - (operator):
-                    2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="-", type=operator:
+                    text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 * -2 +  3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        * (operator):
-            1 (strnum_literal).
-            - (operator):
-                2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="-", type=operator:
+                text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 +  2 * -3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            1 (strnum_literal).
-            * (operator):
-                2 (strnum_literal).
-                - (operator):
-                    3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="1", type=strnum_literal.
+            text="*", type=operator:
+                text="2", type=strnum_literal.
+                text="-", type=operator:
+                    text="3", type=strnum_literal.
 
 mlr filter -v       1 +  2 * -3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        1 (strnum_literal).
-        * (operator):
-            2 (strnum_literal).
-            - (operator):
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="1", type=strnum_literal.
+        text="*", type=operator:
+            text="2", type=strnum_literal.
+            text="-", type=operator:
+                text="3", type=strnum_literal.
 
 mlr put -v $x =  1 *  2 + -3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        + (operator):
-            * (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            - (operator):
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="+", type=operator:
+            text="*", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="-", type=operator:
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 *  2 + -3 /dev/null
 AST ROOT:
-list (statement_list):
-    + (operator):
-        * (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        - (operator):
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="+", type=operator:
+        text="*", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="-", type=operator:
+            text="3", type=strnum_literal.
 
 mlr put -v $x = ~1 |  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            ~ (operator):
-                1 (strnum_literal).
-            & (operator):
-                2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="~", type=operator:
+                text="1", type=strnum_literal.
+            text="&", type=operator:
+                text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v      ~1 |  2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        ~ (operator):
-            1 (strnum_literal).
-        & (operator):
-            2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="~", type=operator:
+            text="1", type=strnum_literal.
+        text="&", type=operator:
+            text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = ~1 &  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            & (operator):
-                ~ (operator):
-                    1 (strnum_literal).
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="&", type=operator:
+                text="~", type=operator:
+                    text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v      ~1 &  2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        & (operator):
-            ~ (operator):
-                1 (strnum_literal).
-            2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="&", type=operator:
+            text="~", type=operator:
+                text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 | ~2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            1 (strnum_literal).
-            & (operator):
-                ~ (operator):
-                    2 (strnum_literal).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="1", type=strnum_literal.
+            text="&", type=operator:
+                text="~", type=operator:
+                    text="2", type=strnum_literal.
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 | ~2 &  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        1 (strnum_literal).
-        & (operator):
-            ~ (operator):
-                2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="1", type=strnum_literal.
+        text="&", type=operator:
+            text="~", type=operator:
+                text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr put -v $x =  1 & ~2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            & (operator):
-                1 (strnum_literal).
-                ~ (operator):
-                    2 (strnum_literal).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="&", type=operator:
+                text="1", type=strnum_literal.
+                text="~", type=operator:
+                    text="2", type=strnum_literal.
+            text="3", type=strnum_literal.
 
 mlr filter -v       1 & ~2 |  3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        & (operator):
-            1 (strnum_literal).
-            ~ (operator):
-                2 (strnum_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="&", type=operator:
+            text="1", type=strnum_literal.
+            text="~", type=operator:
+                text="2", type=strnum_literal.
+        text="3", type=strnum_literal.
 
 mlr put -v $x =  1 |  2 & ~3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            1 (strnum_literal).
-            & (operator):
-                2 (strnum_literal).
-                ~ (operator):
-                    3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="1", type=strnum_literal.
+            text="&", type=operator:
+                text="2", type=strnum_literal.
+                text="~", type=operator:
+                    text="3", type=strnum_literal.
 
 mlr filter -v       1 |  2 & ~3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        1 (strnum_literal).
-        & (operator):
-            2 (strnum_literal).
-            ~ (operator):
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="1", type=strnum_literal.
+        text="&", type=operator:
+            text="2", type=strnum_literal.
+            text="~", type=operator:
+                text="3", type=strnum_literal.
 
 mlr put -v $x =  1 &  2 | ~3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        | (operator):
-            & (operator):
-                1 (strnum_literal).
-                2 (strnum_literal).
-            ~ (operator):
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="|", type=operator:
+            text="&", type=operator:
+                text="1", type=strnum_literal.
+                text="2", type=strnum_literal.
+            text="~", type=operator:
+                text="3", type=strnum_literal.
 
 mlr filter -v       1 &  2 | ~3 /dev/null
 AST ROOT:
-list (statement_list):
-    | (operator):
-        & (operator):
-            1 (strnum_literal).
-            2 (strnum_literal).
-        ~ (operator):
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="|", type=operator:
+        text="&", type=operator:
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="~", type=operator:
+            text="3", type=strnum_literal.
 
 mlr put -v $x = $a==1 && $b == 1 && $c == 1 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        && (operator):
-            && (operator):
-                == (operator):
-                    a (field_name).
-                    1 (strnum_literal).
-                == (operator):
-                    b (field_name).
-                    1 (strnum_literal).
-            == (operator):
-                c (field_name).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="&&", type=operator:
+            text="&&", type=operator:
+                text="==", type=operator:
+                    text="a", type=field_name.
+                    text="1", type=strnum_literal.
+                text="==", type=operator:
+                    text="b", type=field_name.
+                    text="1", type=strnum_literal.
+            text="==", type=operator:
+                text="c", type=field_name.
+                text="1", type=strnum_literal.
 
 mlr filter -v      $a==1 && $b == 1 && $c == 1 /dev/null
 AST ROOT:
-list (statement_list):
-    && (operator):
-        && (operator):
-            == (operator):
-                a (field_name).
-                1 (strnum_literal).
-            == (operator):
-                b (field_name).
-                1 (strnum_literal).
-        == (operator):
-            c (field_name).
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="&&", type=operator:
+        text="&&", type=operator:
+            text="==", type=operator:
+                text="a", type=field_name.
+                text="1", type=strnum_literal.
+            text="==", type=operator:
+                text="b", type=field_name.
+                text="1", type=strnum_literal.
+        text="==", type=operator:
+            text="c", type=field_name.
+            text="1", type=strnum_literal.
 
 mlr put -v $x = $a==1 || $b == 1 && $c == 1 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        || (operator):
-            == (operator):
-                a (field_name).
-                1 (strnum_literal).
-            && (operator):
-                == (operator):
-                    b (field_name).
-                    1 (strnum_literal).
-                == (operator):
-                    c (field_name).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="||", type=operator:
+            text="==", type=operator:
+                text="a", type=field_name.
+                text="1", type=strnum_literal.
+            text="&&", type=operator:
+                text="==", type=operator:
+                    text="b", type=field_name.
+                    text="1", type=strnum_literal.
+                text="==", type=operator:
+                    text="c", type=field_name.
+                    text="1", type=strnum_literal.
 
 mlr filter -v      $a==1 || $b == 1 && $c == 1 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        == (operator):
-            a (field_name).
-            1 (strnum_literal).
-        && (operator):
-            == (operator):
-                b (field_name).
-                1 (strnum_literal).
-            == (operator):
-                c (field_name).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="==", type=operator:
+            text="a", type=field_name.
+            text="1", type=strnum_literal.
+        text="&&", type=operator:
+            text="==", type=operator:
+                text="b", type=field_name.
+                text="1", type=strnum_literal.
+            text="==", type=operator:
+                text="c", type=field_name.
+                text="1", type=strnum_literal.
 
 mlr put -v $x = $a==1 || $b == 1 || $c == 1 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        || (operator):
-            || (operator):
-                == (operator):
-                    a (field_name).
-                    1 (strnum_literal).
-                == (operator):
-                    b (field_name).
-                    1 (strnum_literal).
-            == (operator):
-                c (field_name).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="||", type=operator:
+            text="||", type=operator:
+                text="==", type=operator:
+                    text="a", type=field_name.
+                    text="1", type=strnum_literal.
+                text="==", type=operator:
+                    text="b", type=field_name.
+                    text="1", type=strnum_literal.
+            text="==", type=operator:
+                text="c", type=field_name.
+                text="1", type=strnum_literal.
 
 mlr filter -v      $a==1 || $b == 1 || $c == 1 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        || (operator):
-            == (operator):
-                a (field_name).
-                1 (strnum_literal).
-            == (operator):
-                b (field_name).
-                1 (strnum_literal).
-        == (operator):
-            c (field_name).
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="||", type=operator:
+            text="==", type=operator:
+                text="a", type=field_name.
+                text="1", type=strnum_literal.
+            text="==", type=operator:
+                text="b", type=field_name.
+                text="1", type=strnum_literal.
+        text="==", type=operator:
+            text="c", type=field_name.
+            text="1", type=strnum_literal.
 
 mlr put -v $x = $a==1 && $b == 1 || $c == 1 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        || (operator):
-            && (operator):
-                == (operator):
-                    a (field_name).
-                    1 (strnum_literal).
-                == (operator):
-                    b (field_name).
-                    1 (strnum_literal).
-            == (operator):
-                c (field_name).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="||", type=operator:
+            text="&&", type=operator:
+                text="==", type=operator:
+                    text="a", type=field_name.
+                    text="1", type=strnum_literal.
+                text="==", type=operator:
+                    text="b", type=field_name.
+                    text="1", type=strnum_literal.
+            text="==", type=operator:
+                text="c", type=field_name.
+                text="1", type=strnum_literal.
 
 mlr filter -v      $a==1 && $b == 1 || $c == 1 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        && (operator):
-            == (operator):
-                a (field_name).
-                1 (strnum_literal).
-            == (operator):
-                b (field_name).
-                1 (strnum_literal).
-        == (operator):
-            c (field_name).
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="&&", type=operator:
+            text="==", type=operator:
+                text="a", type=field_name.
+                text="1", type=strnum_literal.
+            text="==", type=operator:
+                text="b", type=field_name.
+                text="1", type=strnum_literal.
+        text="==", type=operator:
+            text="c", type=field_name.
+            text="1", type=strnum_literal.
 
 mlr put -v $x = $a==1 ? $b == 2 : $c == 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        ? : (operator):
-            == (operator):
-                a (field_name).
-                1 (strnum_literal).
-            == (operator):
-                b (field_name).
-                2 (strnum_literal).
-            == (operator):
-                c (field_name).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="? :", type=operator:
+            text="==", type=operator:
+                text="a", type=field_name.
+                text="1", type=strnum_literal.
+            text="==", type=operator:
+                text="b", type=field_name.
+                text="2", type=strnum_literal.
+            text="==", type=operator:
+                text="c", type=field_name.
+                text="3", type=strnum_literal.
 
 mlr filter -v      $a==1 ? $b == 2 : $c == 3 /dev/null
 AST ROOT:
-list (statement_list):
-    ? : (operator):
-        == (operator):
-            a (field_name).
-            1 (strnum_literal).
-        == (operator):
-            b (field_name).
-            2 (strnum_literal).
-        == (operator):
-            c (field_name).
-            3 (strnum_literal).
+text="list", type=statement_list:
+    text="? :", type=operator:
+        text="==", type=operator:
+            text="a", type=field_name.
+            text="1", type=strnum_literal.
+        text="==", type=operator:
+            text="b", type=field_name.
+            text="2", type=strnum_literal.
+        text="==", type=operator:
+            text="c", type=field_name.
+            text="3", type=strnum_literal.
 
 mlr put -v $x = true /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        true (boolean_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="true", type=boolean_literal.
 
 mlr filter -v      true /dev/null
 AST ROOT:
-list (statement_list):
-    true (boolean_literal).
+text="list", type=statement_list:
+    text="true", type=boolean_literal.
 
 mlr put -v true || 1==0; $x = 3 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        true (boolean_literal).
-        == (operator):
-            1 (strnum_literal).
-            0 (strnum_literal).
-    = (srec_assignment):
-        x (field_name).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="true", type=boolean_literal.
+        text="==", type=operator:
+            text="1", type=strnum_literal.
+            text="0", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="3", type=strnum_literal.
 
 mlr filter -v         true || 1==0 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        true (boolean_literal).
-        == (operator):
-            1 (strnum_literal).
-            0 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="true", type=boolean_literal.
+        text="==", type=operator:
+            text="1", type=strnum_literal.
+            text="0", type=strnum_literal.
 
 mlr put -v 1==0 || false; $x = 3 /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        == (operator):
-            1 (strnum_literal).
-            0 (strnum_literal).
-        false (boolean_literal).
-    = (srec_assignment):
-        x (field_name).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="==", type=operator:
+            text="1", type=strnum_literal.
+            text="0", type=strnum_literal.
+        text="false", type=boolean_literal.
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="3", type=strnum_literal.
 
 mlr filter -v         1==0 || false /dev/null
 AST ROOT:
-list (statement_list):
-    || (operator):
-        == (operator):
-            1 (strnum_literal).
-            0 (strnum_literal).
-        false (boolean_literal).
+text="list", type=statement_list:
+    text="||", type=operator:
+        text="==", type=operator:
+            text="1", type=strnum_literal.
+            text="0", type=strnum_literal.
+        text="false", type=boolean_literal.
 
 mlr put -v true && false; $x = 3 /dev/null
 AST ROOT:
-list (statement_list):
-    && (operator):
-        true (boolean_literal).
-        false (boolean_literal).
-    = (srec_assignment):
-        x (field_name).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="&&", type=operator:
+        text="true", type=boolean_literal.
+        text="false", type=boolean_literal.
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="3", type=strnum_literal.
 
 mlr filter -v         true && false /dev/null
 AST ROOT:
-list (statement_list):
-    && (operator):
-        true (boolean_literal).
-        false (boolean_literal).
+text="list", type=statement_list:
+    text="&&", type=operator:
+        text="true", type=boolean_literal.
+        text="false", type=boolean_literal.
 
 mlr put -v true && false && true; $x = 3 /dev/null
 AST ROOT:
-list (statement_list):
-    && (operator):
-        && (operator):
-            true (boolean_literal).
-            false (boolean_literal).
-        true (boolean_literal).
-    = (srec_assignment):
-        x (field_name).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text="&&", type=operator:
+        text="&&", type=operator:
+            text="true", type=boolean_literal.
+            text="false", type=boolean_literal.
+        text="true", type=boolean_literal.
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="3", type=strnum_literal.
 
 mlr filter -v         true && false && true /dev/null
 AST ROOT:
-list (statement_list):
-    && (operator):
-        && (operator):
-            true (boolean_literal).
-            false (boolean_literal).
-        true (boolean_literal).
+text="list", type=statement_list:
+    text="&&", type=operator:
+        text="&&", type=operator:
+            text="true", type=boolean_literal.
+            text="false", type=boolean_literal.
+        text="true", type=boolean_literal.
 
 mlr put -v $y += $x + 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        + (operator):
-            y (field_name).
-            + (operator):
-                x (field_name).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="+", type=operator:
+            text="y", type=field_name.
+            text="+", type=operator:
+                text="x", type=field_name.
+                text="3", type=strnum_literal.
 
 mlr put -v $y += $x * 3 /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        + (operator):
-            y (field_name).
-            * (operator):
-                x (field_name).
-                3 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="+", type=operator:
+            text="y", type=field_name.
+            text="*", type=operator:
+                text="x", type=field_name.
+                text="3", type=strnum_literal.
 
 mlr put -v $y ||= $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        || (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="||", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y ^^= $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        ^^ (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="^^", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y &&= $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        && (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="&&", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y |=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        | (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="|", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y ^=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        ^ (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="^", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y &=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        & (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="&", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y <<= $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        << (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="<<", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y >>= $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        >> (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text=">>", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y +=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        + (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="+", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y -=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        - (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="-", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y .=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        . (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text=".", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y *=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        * (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="*", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y /=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        / (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="/", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y //= $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        // (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="//", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y %=  $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        % (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="%", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 mlr put -v $y **= $x /dev/null
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        y (field_name).
-        ** (operator):
-            y (field_name).
-            x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="y", type=field_name.
+        text="**", type=operator:
+            text="y", type=field_name.
+            text="x", type=field_name.
 
 
 ================================================================
@@ -8551,258 +8551,258 @@ mlr filter: filter statement must not be empty.
 
 mlr -n put -v begin {}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
 
 mlr -n put -v begin {;}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
 
 mlr -n put -v begin {;;}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
 
 mlr -n put -v begin {;;;}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
 
 mlr -n put -v begin {@x=1}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v begin {@x=1;}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v begin {;@x=1}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v begin {@x=1;@y=2}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    y (string_literal).
-                2 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="y", type=string_literal.
+                text="2", type=strnum_literal.
 
 mlr -n put -v begin {@x=1;;@y=2}
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    y (string_literal).
-                2 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="y", type=string_literal.
+                text="2", type=strnum_literal.
 
 mlr -n put -v true {}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
 
 mlr -n put -v true {;}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
 
 mlr -n put -v true {;;}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
 
 mlr -n put -v true {;;;}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
 
 mlr -n put -v true {@x=1}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v true {@x=1;}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v true {;@x=1}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v true {@x=1;@y=2}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    y (string_literal).
-                2 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="y", type=string_literal.
+                text="2", type=strnum_literal.
 
 mlr -n put -v true {@x=1;;@y=2}
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    y (string_literal).
-                2 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="y", type=string_literal.
+                text="2", type=strnum_literal.
 
 mlr -n put -v end {}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
 
 mlr -n put -v end {;}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
 
 mlr -n put -v end {;;}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
 
 mlr -n put -v end {;;;}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
 
 mlr -n put -v end {@x=1}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v end {@x=1;}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v end {;@x=1}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
 
 mlr -n put -v end {@x=1;@y=2}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    y (string_literal).
-                2 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="y", type=string_literal.
+                text="2", type=strnum_literal.
 
 mlr -n put -v end {@x=1;;@y=2}
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                1 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    y (string_literal).
-                2 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="1", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="y", type=string_literal.
+                text="2", type=strnum_literal.
 
 
 ================================================================
@@ -8813,191 +8813,191 @@ DSL CONTEXT-SPECIFIC VALIDATION
 mlr put -v begin{begin{@x=1}}
 mlr: begin statements are only valid at top level.
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            begin (begin):
-                list (statement_list):
-                    = (oosvar_assignment):
-                        oosvar_keylist (oosvar_keylist):
-                            x (string_literal).
-                        1 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="begin", type=begin:
+                text="list", type=statement_list:
+                    text="=", type=oosvar_assignment:
+                        text="oosvar_keylist", type=oosvar_keylist:
+                            text="x", type=string_literal.
+                        text="1", type=strnum_literal.
 
 mlr put -v true{begin{@x=1}}
 mlr: begin statements are only valid at top level.
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
-            begin (begin):
-                list (statement_list):
-                    = (oosvar_assignment):
-                        oosvar_keylist (oosvar_keylist):
-                            x (string_literal).
-                        1 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
+            text="begin", type=begin:
+                text="list", type=statement_list:
+                    text="=", type=oosvar_assignment:
+                        text="oosvar_keylist", type=oosvar_keylist:
+                            text="x", type=string_literal.
+                        text="1", type=strnum_literal.
 
 mlr put -v end{end{@x=1}}
 mlr: end statements are only valid at top level.
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            end (end):
-                list (statement_list):
-                    = (oosvar_assignment):
-                        oosvar_keylist (oosvar_keylist):
-                            x (string_literal).
-                        1 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="end", type=end:
+                text="list", type=statement_list:
+                    text="=", type=oosvar_assignment:
+                        text="oosvar_keylist", type=oosvar_keylist:
+                            text="x", type=string_literal.
+                        text="1", type=strnum_literal.
 
 mlr put -v true{end{@x=1}}
 mlr: end statements are only valid at top level.
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
-            end (end):
-                list (statement_list):
-                    = (oosvar_assignment):
-                        oosvar_keylist (oosvar_keylist):
-                            x (string_literal).
-                        1 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
+            text="end", type=end:
+                text="list", type=statement_list:
+                    text="=", type=oosvar_assignment:
+                        text="oosvar_keylist", type=oosvar_keylist:
+                            text="x", type=string_literal.
+                        text="1", type=strnum_literal.
 
 
 ---------------------------------------------------------------- srecs in begin/end
 mlr put -v begin{$x=1}
 mlr: assignments to $-variables are not valid within begin or end blocks.
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (srec_assignment):
-                x (field_name).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="x", type=field_name.
+                text="1", type=strnum_literal.
 
 mlr put -v begin{@x=$y}
 mlr: statements involving $-variables are not valid within begin or end blocks.
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                y (field_name).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="y", type=field_name.
 
 mlr put -v end{$x=1}
 mlr: assignments to $-variables are not valid within begin or end blocks.
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (srec_assignment):
-                x (field_name).
-                1 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="x", type=field_name.
+                text="1", type=strnum_literal.
 
 mlr put -v end{@x=$y}
 mlr: statements involving $-variables are not valid within begin or end blocks.
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                y (field_name).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="y", type=field_name.
 
 mlr put -v begin{unset $x}
 mlr: unset of $-variables is not valid within begin or end blocks.
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            unset (unset):
-                x (field_name).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="unset", type=unset:
+                text="x", type=field_name.
 
 mlr put -v end{unset $x}
 mlr: unset of $-variables is not valid within begin or end blocks.
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            unset (unset):
-                x (field_name).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="unset", type=unset:
+                text="x", type=field_name.
 
 mlr put -v begin{unset $*}
 mlr: unset of $-variables is not valid within begin or end blocks.
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            unset (unset):
-                $* (full_srec).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="unset", type=unset:
+                text="$*", type=full_srec.
 
 mlr put -v end{unset $*}
 mlr: unset of $-variables is not valid within begin or end blocks.
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            unset (unset):
-                $* (full_srec).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="unset", type=unset:
+                text="$*", type=full_srec.
 
 
 ---------------------------------------------------------------- boundvars outside for
 mlr put -v $x=x
 mlr: statements involving bound variables are not valid outside for-loops.
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        x (bound_variable).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="x", type=bound_variable.
 
 
 ---------------------------------------------------------------- break/continue outside loop
 mlr put -v break
 mlr: break statements are only valid within for, while, or do-while.
 AST ROOT:
-list (statement_list):
-    break (break).
+text="list", type=statement_list:
+    text="break", type=break.
 
 mlr put -v continue
 mlr: break statements are only valid within for, while, or do-while.
 AST ROOT:
-list (statement_list):
-    continue (continue).
+text="list", type=statement_list:
+    text="continue", type=continue.
 
 
 ---------------------------------------------------------------- oosvars etc. in mlr filter
 mlr filter -v @x > 3
 mlr: statements involving $-variables are not valid in mlr filter.
 AST ROOT:
-list (statement_list):
-    > (operator):
-        oosvar_keylist (oosvar_keylist):
-            x (string_literal).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text=">", type=operator:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="x", type=string_literal.
+        text="3", type=strnum_literal.
 
 mlr filter -v x > 3
 mlr: statements involving bound variables are not valid in mlr filter.
 AST ROOT:
-list (statement_list):
-    > (operator):
-        x (bound_variable).
-        3 (strnum_literal).
+text="list", type=statement_list:
+    text=">", type=operator:
+        text="x", type=bound_variable.
+        text="3", type=strnum_literal.
 
 mlr filter -v break
 mlr: expressions for mlr filter must be single statements, evaluating to boolean.
 AST ROOT:
-list (statement_list):
-    break (break).
+text="list", type=statement_list:
+    text="break", type=break.
 
 mlr filter -v continue
 mlr: expressions for mlr filter must be single statements, evaluating to boolean.
 AST ROOT:
-list (statement_list):
-    continue (continue).
+text="list", type=statement_list:
+    text="continue", type=continue.
 
 
 ================================================================
@@ -12528,70 +12528,70 @@ DSL REGEX MATCHING
 
 mlr filter -v $x =~ "bcd" ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        bcd (strnum_literal).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="bcd", type=strnum_literal.
 x=abcd,y=ghi
 x=abcde,y=ghi
 
 mlr filter -v $x =~ "^bcd" ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        ^bcd (strnum_literal).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="^bcd", type=strnum_literal.
 
 mlr filter -v $x =~ "^abc" ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        ^abc (strnum_literal).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="^abc", type=strnum_literal.
 x=abc,y=def
 x=abcd,y=ghi
 x=abcde,y=ghi
 
 mlr filter -v $x =~ "^abc$" ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        ^abc$ (strnum_literal).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="^abc$", type=strnum_literal.
 x=abc,y=def
 
 mlr filter -v $x =~ "^a.*d$" ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        ^a.*d$ (strnum_literal).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="^a.*d$", type=strnum_literal.
 x=abcd,y=ghi
 
 mlr filter -v $x =~ "^a.*"."d$" ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        . (operator):
-            ^a.* (strnum_literal).
-            d$ (strnum_literal).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text=".", type=operator:
+            text="^a.*", type=strnum_literal.
+            text="d$", type=strnum_literal.
 x=abcd,y=ghi
 
 mlr filter -v $y =~ "\".." ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        y (field_name).
-        ".. (strnum_literal).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="y", type=field_name.
+        text=""..", type=strnum_literal.
 x=ABCDE,y="GHI"
 
 mlr filter -v $x =~ "bcd"i ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        bcd (regexi).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="bcd", type=regexi.
 x=abcd,y=ghi
 x=ABCD,y=GHI
 x=abcde,y=ghi
@@ -12600,17 +12600,17 @@ x=ABCDE,y="GHI"
 
 mlr filter -v $x =~ "^bcd"i ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        ^bcd (regexi).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="^bcd", type=regexi.
 
 mlr filter -v $x =~ "^abc"i ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        ^abc (regexi).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="^abc", type=regexi.
 x=abc,y=def
 x=ABC,y=DEF
 x=abcd,y=ghi
@@ -12621,30 +12621,30 @@ x=ABCDE,y="GHI"
 
 mlr filter -v $x =~ "^abc$"i ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        ^abc$ (regexi).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="^abc$", type=regexi.
 x=abc,y=def
 x=ABC,y=DEF
 
 mlr filter -v $x =~ "^a.*d$"i ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        ^a.*d$ (regexi).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text="^a.*d$", type=regexi.
 x=abcd,y=ghi
 x=ABCD,y=GHI
 
 mlr filter -v $x =~ "^a.*"."d$"i ./reg_test/input/regex.dkvp
 AST ROOT:
-list (statement_list):
-    =~ (operator):
-        x (field_name).
-        . (operator):
-            ^a.* (strnum_literal).
-            d$ (regexi).
+text="list", type=statement_list:
+    text="=~", type=operator:
+        text="x", type=field_name.
+        text=".", type=operator:
+            text="^a.*", type=strnum_literal.
+            text="d$", type=regexi.
 x=abcd,y=ghi
 
 
@@ -13753,23 +13753,23 @@ DSL OOSVARS
 
 mlr --opprint put -v begin{@ox=0}; $d=$x-@ox; @ox=$x ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    ox (string_literal).
-                0 (strnum_literal).
-    = (srec_assignment):
-        d (field_name).
-        - (operator):
-            x (field_name).
-            oosvar_keylist (oosvar_keylist):
-                ox (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            ox (string_literal).
-        x (field_name).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="ox", type=string_literal.
+                text="0", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="d", type=field_name.
+        text="-", type=operator:
+            text="x", type=field_name.
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="ox", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="ox", type=string_literal.
+        text="x", type=field_name.
 a   b   i  x                   y                   d
 pan pan 1  0.3467901443380824  0.7268028627434533  0.346790
 eks pan 2  0.7586799647899636  0.5221511083334797  0.411890
@@ -13784,29 +13784,29 @@ pan wye 10 0.5026260055412137  0.9526183602969864  0.471184
 
 mlr --opprint put -v begin{@ox="no"}; $d=@ox == "no" ? 1.0 : $x/@ox; @ox=$x then step -a ratio -f x ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    ox (string_literal).
-                no (strnum_literal).
-    = (srec_assignment):
-        d (field_name).
-        ? : (operator):
-            == (operator):
-                oosvar_keylist (oosvar_keylist):
-                    ox (string_literal).
-                no (strnum_literal).
-            1.0 (strnum_literal).
-            / (operator):
-                x (field_name).
-                oosvar_keylist (oosvar_keylist):
-                    ox (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            ox (string_literal).
-        x (field_name).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="ox", type=string_literal.
+                text="no", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="d", type=field_name.
+        text="? :", type=operator:
+            text="==", type=operator:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="ox", type=string_literal.
+                text="no", type=strnum_literal.
+            text="1.0", type=strnum_literal.
+            text="/", type=operator:
+                text="x", type=field_name.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="ox", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="ox", type=string_literal.
+        text="x", type=field_name.
 a   b   i  x                   y                   d         x_ratio
 pan pan 1  0.3467901443380824  0.7268028627434533  1.000000  1.000000
 eks pan 2  0.7586799647899636  0.5221511083334797  2.187721  2.187721
@@ -13821,17 +13821,17 @@ pan wye 10 0.5026260055412137  0.9526183602969864  15.985878 15.985878
 
 mlr --opprint put -v $d=$x/@ox; @ox=$x then step -a ratio -f x ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        d (field_name).
-        / (operator):
-            x (field_name).
-            oosvar_keylist (oosvar_keylist):
-                ox (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            ox (string_literal).
-        x (field_name).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="d", type=field_name.
+        text="/", type=operator:
+            text="x", type=field_name.
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="ox", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="ox", type=string_literal.
+        text="x", type=field_name.
 a   b   i  x                   y                   d         x_ratio
 pan pan 1  0.3467901443380824  0.7268028627434533  0.346790  1.000000
 eks pan 2  0.7586799647899636  0.5221511083334797  2.187721  2.187721
@@ -13846,29 +13846,29 @@ pan wye 10 0.5026260055412137  0.9526183602969864  15.985878 15.985878
 
 mlr --opprint put -v begin{@ox="no"}; $d=@ox == "no" ? 1.0 : $x/@ox; @ox=$x then step -a ratio -f x ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    ox (string_literal).
-                no (strnum_literal).
-    = (srec_assignment):
-        d (field_name).
-        ? : (operator):
-            == (operator):
-                oosvar_keylist (oosvar_keylist):
-                    ox (string_literal).
-                no (strnum_literal).
-            1.0 (strnum_literal).
-            / (operator):
-                x (field_name).
-                oosvar_keylist (oosvar_keylist):
-                    ox (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            ox (string_literal).
-        x (field_name).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="ox", type=string_literal.
+                text="no", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="d", type=field_name.
+        text="? :", type=operator:
+            text="==", type=operator:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="ox", type=string_literal.
+                text="no", type=strnum_literal.
+            text="1.0", type=strnum_literal.
+            text="/", type=operator:
+                text="x", type=field_name.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="ox", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="ox", type=string_literal.
+        text="x", type=field_name.
 a   b   i  x                   y                   d         x_ratio
 pan pan 1  0.3467901443380824  0.7268028627434533  1.000000  1.000000
 eks pan 2  0.7586799647899636  0.5221511083334797  2.187721  2.187721
@@ -13883,24 +13883,24 @@ pan wye 10 0.5026260055412137  0.9526183602969864  15.985878 15.985878
 
 mlr --opprint put -v begin{@rsum = 0}; @rsum = @rsum + $x; $rsum = @rsum ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    rsum (string_literal).
-                0 (strnum_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            rsum (string_literal).
-        + (operator):
-            oosvar_keylist (oosvar_keylist):
-                rsum (string_literal).
-            x (field_name).
-    = (srec_assignment):
-        rsum (field_name).
-        oosvar_keylist (oosvar_keylist):
-            rsum (string_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="rsum", type=string_literal.
+                text="0", type=strnum_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="rsum", type=string_literal.
+        text="+", type=operator:
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="rsum", type=string_literal.
+            text="x", type=field_name.
+    text="=", type=srec_assignment:
+        text="rsum", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="rsum", type=string_literal.
 a   b   i  x                   y                   rsum
 pan pan 1  0.3467901443380824  0.7268028627434533  0.346790
 eks pan 2  0.7586799647899636  0.5221511083334797  1.105470
@@ -13915,57 +13915,57 @@ pan wye 10 0.5026260055412137  0.9526183602969864  4.536294
 
 mlr --opprint put -v begin{@a=0; @b=0; @c=0}; $za=@a; $zb=@b; $zc=@c; $d=@a+@b+@c; @a=@b; @b=@c; @c=$i ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                0 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    b (string_literal).
-                0 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    c (string_literal).
-                0 (strnum_literal).
-    = (srec_assignment):
-        za (field_name).
-        oosvar_keylist (oosvar_keylist):
-            a (string_literal).
-    = (srec_assignment):
-        zb (field_name).
-        oosvar_keylist (oosvar_keylist):
-            b (string_literal).
-    = (srec_assignment):
-        zc (field_name).
-        oosvar_keylist (oosvar_keylist):
-            c (string_literal).
-    = (srec_assignment):
-        d (field_name).
-        + (operator):
-            + (operator):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    b (string_literal).
-            oosvar_keylist (oosvar_keylist):
-                c (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            a (string_literal).
-        oosvar_keylist (oosvar_keylist):
-            b (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            b (string_literal).
-        oosvar_keylist (oosvar_keylist):
-            c (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            c (string_literal).
-        i (field_name).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="0", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="b", type=string_literal.
+                text="0", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="c", type=string_literal.
+                text="0", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="za", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="a", type=string_literal.
+    text="=", type=srec_assignment:
+        text="zb", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="b", type=string_literal.
+    text="=", type=srec_assignment:
+        text="zc", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="c", type=string_literal.
+    text="=", type=srec_assignment:
+        text="d", type=field_name.
+        text="+", type=operator:
+            text="+", type=operator:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="b", type=string_literal.
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="c", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="a", type=string_literal.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="b", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="b", type=string_literal.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="c", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="c", type=string_literal.
+        text="i", type=field_name.
 a   b   i  x                   y                   za zb zc d
 pan pan 1  0.3467901443380824  0.7268028627434533  0  0  0  0
 eks pan 2  0.7586799647899636  0.5221511083334797  0  0  1  1
@@ -13980,57 +13980,57 @@ pan wye 10 0.5026260055412137  0.9526183602969864  7  8  9  24
 
 mlr --opprint put -v begin {@a=0; @b=0; @c=0}; $za=@a; $zb=@b; $zc=@c; $d=@a+@b+@c; @a=@b; @b=@c; @c=$i ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                0 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    b (string_literal).
-                0 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    c (string_literal).
-                0 (strnum_literal).
-    = (srec_assignment):
-        za (field_name).
-        oosvar_keylist (oosvar_keylist):
-            a (string_literal).
-    = (srec_assignment):
-        zb (field_name).
-        oosvar_keylist (oosvar_keylist):
-            b (string_literal).
-    = (srec_assignment):
-        zc (field_name).
-        oosvar_keylist (oosvar_keylist):
-            c (string_literal).
-    = (srec_assignment):
-        d (field_name).
-        + (operator):
-            + (operator):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    b (string_literal).
-            oosvar_keylist (oosvar_keylist):
-                c (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            a (string_literal).
-        oosvar_keylist (oosvar_keylist):
-            b (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            b (string_literal).
-        oosvar_keylist (oosvar_keylist):
-            c (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            c (string_literal).
-        i (field_name).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="0", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="b", type=string_literal.
+                text="0", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="c", type=string_literal.
+                text="0", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="za", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="a", type=string_literal.
+    text="=", type=srec_assignment:
+        text="zb", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="b", type=string_literal.
+    text="=", type=srec_assignment:
+        text="zc", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="c", type=string_literal.
+    text="=", type=srec_assignment:
+        text="d", type=field_name.
+        text="+", type=operator:
+            text="+", type=operator:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="b", type=string_literal.
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="c", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="a", type=string_literal.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="b", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="b", type=string_literal.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="c", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="c", type=string_literal.
+        text="i", type=field_name.
 a   b   i  x                   y                   za zb zc d
 pan pan 1  0.3467901443380824  0.7268028627434533  0  0  0  0
 eks pan 2  0.7586799647899636  0.5221511083334797  0  0  1  1
@@ -14045,23 +14045,23 @@ pan wye 10 0.5026260055412137  0.9526183602969864  7  8  9  24
 
 mlr --opprint put -v begin{@ox=0}; $d=$x-@ox; @ox=$x ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    ox (string_literal).
-                0 (strnum_literal).
-    = (srec_assignment):
-        d (field_name).
-        - (operator):
-            x (field_name).
-            oosvar_keylist (oosvar_keylist):
-                ox (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            ox (string_literal).
-        x (field_name).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="ox", type=string_literal.
+                text="0", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="d", type=field_name.
+        text="-", type=operator:
+            text="x", type=field_name.
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="ox", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="ox", type=string_literal.
+        text="x", type=field_name.
 a   b   i  x                   y                   d
 pan pan 1  0.3467901443380824  0.7268028627434533  0.346790
 eks pan 2  0.7586799647899636  0.5221511083334797  0.411890
@@ -14076,30 +14076,30 @@ pan wye 10 0.5026260055412137  0.9526183602969864  0.471184
 
 mlr put -v @a=$a; @b=$b; @c=$x; end {emitf @a; emitf @b; emitf @c} ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            a (string_literal).
-        a (field_name).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            b (string_literal).
-        b (field_name).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            c (string_literal).
-        x (field_name).
-    end (end):
-        list (statement_list):
-            emitf (emitf):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-            emitf (emitf):
-                oosvar_keylist (oosvar_keylist):
-                    b (string_literal).
-            emitf (emitf):
-                oosvar_keylist (oosvar_keylist):
-                    c (string_literal).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="a", type=string_literal.
+        text="a", type=field_name.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="b", type=string_literal.
+        text="b", type=field_name.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="c", type=string_literal.
+        text="x", type=field_name.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="emitf", type=emitf:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+            text="emitf", type=emitf:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="b", type=string_literal.
+            text="emitf", type=emitf:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="c", type=string_literal.
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -14116,28 +14116,28 @@ c=0.502626
 
 mlr put -v @a=$a; @b=$b; @c=$x; end{emitf @a, @b, @c} ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            a (string_literal).
-        a (field_name).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            b (string_literal).
-        b (field_name).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            c (string_literal).
-        x (field_name).
-    end (end):
-        list (statement_list):
-            emitf (emitf):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    b (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    c (string_literal).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="a", type=string_literal.
+        text="a", type=field_name.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="b", type=string_literal.
+        text="b", type=field_name.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="c", type=string_literal.
+        text="x", type=field_name.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="emitf", type=emitf:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="b", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="c", type=string_literal.
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -14152,44 +14152,44 @@ a=pan,b=wye,c=0.502626
 
 mlr --opprint put -v begin {@count=0; @sum=0.0}; @count=@count+1; @sum=@sum+$x; end{@mean=@sum/@count; emitf @mean} ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    count (string_literal).
-                0 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    sum (string_literal).
-                0.0 (strnum_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            count (string_literal).
-        + (operator):
-            oosvar_keylist (oosvar_keylist):
-                count (string_literal).
-            1 (strnum_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            sum (string_literal).
-        + (operator):
-            oosvar_keylist (oosvar_keylist):
-                sum (string_literal).
-            x (field_name).
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    mean (string_literal).
-                / (operator):
-                    oosvar_keylist (oosvar_keylist):
-                        sum (string_literal).
-                    oosvar_keylist (oosvar_keylist):
-                        count (string_literal).
-            emitf (emitf):
-                oosvar_keylist (oosvar_keylist):
-                    mean (string_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="count", type=string_literal.
+                text="0", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="sum", type=string_literal.
+                text="0.0", type=strnum_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="count", type=string_literal.
+        text="+", type=operator:
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="count", type=string_literal.
+            text="1", type=strnum_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="sum", type=string_literal.
+        text="+", type=operator:
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="sum", type=string_literal.
+            text="x", type=field_name.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="mean", type=string_literal.
+                text="/", type=operator:
+                    text="oosvar_keylist", type=oosvar_keylist:
+                        text="sum", type=string_literal.
+                    text="oosvar_keylist", type=oosvar_keylist:
+                        text="count", type=string_literal.
+            text="emitf", type=emitf:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="mean", type=string_literal.
 a   b   i  x                   y
 pan pan 1  0.3467901443380824  0.7268028627434533
 eks pan 2  0.7586799647899636  0.5221511083334797
@@ -14207,44 +14207,44 @@ mean
 
 mlr --opprint put -v end{@mean=@sum/@count; emitf @mean}; begin {@count=0; @sum=0.0}; @count=@count+1; @sum=@sum+$x ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    mean (string_literal).
-                / (operator):
-                    oosvar_keylist (oosvar_keylist):
-                        sum (string_literal).
-                    oosvar_keylist (oosvar_keylist):
-                        count (string_literal).
-            emitf (emitf):
-                oosvar_keylist (oosvar_keylist):
-                    mean (string_literal).
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    count (string_literal).
-                0 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    sum (string_literal).
-                0.0 (strnum_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            count (string_literal).
-        + (operator):
-            oosvar_keylist (oosvar_keylist):
-                count (string_literal).
-            1 (strnum_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            sum (string_literal).
-        + (operator):
-            oosvar_keylist (oosvar_keylist):
-                sum (string_literal).
-            x (field_name).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="mean", type=string_literal.
+                text="/", type=operator:
+                    text="oosvar_keylist", type=oosvar_keylist:
+                        text="sum", type=string_literal.
+                    text="oosvar_keylist", type=oosvar_keylist:
+                        text="count", type=string_literal.
+            text="emitf", type=emitf:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="mean", type=string_literal.
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="count", type=string_literal.
+                text="0", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="sum", type=string_literal.
+                text="0.0", type=strnum_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="count", type=string_literal.
+        text="+", type=operator:
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="count", type=string_literal.
+            text="1", type=strnum_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="sum", type=string_literal.
+        text="+", type=operator:
+            text="oosvar_keylist", type=oosvar_keylist:
+                text="sum", type=string_literal.
+            text="x", type=field_name.
 a   b   i  x                   y
 pan pan 1  0.3467901443380824  0.7268028627434533
 eks pan 2  0.7586799647899636  0.5221511083334797
@@ -14262,39 +14262,39 @@ mean
 
 mlr put -v begin{ @a = @b[1] }; $c = @d; @e[$i][2+$j][3] = $4; end{@f[@g[5][@h]] = 6} /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    b (string_literal).
-                    1 (strnum_literal).
-    = (srec_assignment):
-        c (field_name).
-        oosvar_keylist (oosvar_keylist):
-            d (string_literal).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            e (string_literal).
-            i (field_name).
-            + (operator):
-                2 (strnum_literal).
-                j (field_name).
-            3 (strnum_literal).
-        4 (field_name).
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    f (string_literal).
-                    oosvar_keylist (oosvar_keylist):
-                        g (string_literal).
-                        5 (strnum_literal).
-                        oosvar_keylist (oosvar_keylist):
-                            h (string_literal).
-                6 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="b", type=string_literal.
+                    text="1", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="c", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="d", type=string_literal.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="e", type=string_literal.
+            text="i", type=field_name.
+            text="+", type=operator:
+                text="2", type=strnum_literal.
+                text="j", type=field_name.
+            text="3", type=strnum_literal.
+        text="4", type=field_name.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="f", type=string_literal.
+                    text="oosvar_keylist", type=oosvar_keylist:
+                        text="g", type=string_literal.
+                        text="5", type=strnum_literal.
+                        text="oosvar_keylist", type=oosvar_keylist:
+                            text="h", type=string_literal.
+                text="6", type=strnum_literal.
 
 mlr put @y[$a]=$y; end{dump} ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
@@ -14793,221 +14793,221 @@ DSL PATTERN-ACTION BLOCKS
 
 mlr put -v begin{@a=1}; $e=2; $f==$g||$h==$i {};               $x=6; end{@z=9} /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                1 (strnum_literal).
-    = (srec_assignment):
-        e (field_name).
-        2 (strnum_literal).
-    cond (conditional_block):
-        || (operator):
-            == (operator):
-                f (field_name).
-                g (field_name).
-            == (operator):
-                h (field_name).
-                i (field_name).
-        list (statement_list):
-    = (srec_assignment):
-        x (field_name).
-        6 (strnum_literal).
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    z (string_literal).
-                9 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="1", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="e", type=field_name.
+        text="2", type=strnum_literal.
+    text="cond", type=conditional_block:
+        text="||", type=operator:
+            text="==", type=operator:
+                text="f", type=field_name.
+                text="g", type=field_name.
+            text="==", type=operator:
+                text="h", type=field_name.
+                text="i", type=field_name.
+        text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="6", type=strnum_literal.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="z", type=string_literal.
+                text="9", type=strnum_literal.
 
 mlr put -v begin{@a=1}; $e=2; $f==$g||$h==$i {$s=1};           $x=6; end{@z=9} /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                1 (strnum_literal).
-    = (srec_assignment):
-        e (field_name).
-        2 (strnum_literal).
-    cond (conditional_block):
-        || (operator):
-            == (operator):
-                f (field_name).
-                g (field_name).
-            == (operator):
-                h (field_name).
-                i (field_name).
-        list (statement_list):
-            = (srec_assignment):
-                s (field_name).
-                1 (strnum_literal).
-    = (srec_assignment):
-        x (field_name).
-        6 (strnum_literal).
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    z (string_literal).
-                9 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="1", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="e", type=field_name.
+        text="2", type=strnum_literal.
+    text="cond", type=conditional_block:
+        text="||", type=operator:
+            text="==", type=operator:
+                text="f", type=field_name.
+                text="g", type=field_name.
+            text="==", type=operator:
+                text="h", type=field_name.
+                text="i", type=field_name.
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="s", type=field_name.
+                text="1", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="6", type=strnum_literal.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="z", type=string_literal.
+                text="9", type=strnum_literal.
 
 mlr put -v begin{@a=1}; $e=2; $f==$g||$h==$i {$s=1;$t=2};      $x=6; end{@z=9} /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                1 (strnum_literal).
-    = (srec_assignment):
-        e (field_name).
-        2 (strnum_literal).
-    cond (conditional_block):
-        || (operator):
-            == (operator):
-                f (field_name).
-                g (field_name).
-            == (operator):
-                h (field_name).
-                i (field_name).
-        list (statement_list):
-            = (srec_assignment):
-                s (field_name).
-                1 (strnum_literal).
-            = (srec_assignment):
-                t (field_name).
-                2 (strnum_literal).
-    = (srec_assignment):
-        x (field_name).
-        6 (strnum_literal).
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    z (string_literal).
-                9 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="1", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="e", type=field_name.
+        text="2", type=strnum_literal.
+    text="cond", type=conditional_block:
+        text="||", type=operator:
+            text="==", type=operator:
+                text="f", type=field_name.
+                text="g", type=field_name.
+            text="==", type=operator:
+                text="h", type=field_name.
+                text="i", type=field_name.
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="s", type=field_name.
+                text="1", type=strnum_literal.
+            text="=", type=srec_assignment:
+                text="t", type=field_name.
+                text="2", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="6", type=strnum_literal.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="z", type=string_literal.
+                text="9", type=strnum_literal.
 
 mlr put -v begin{@a=1}; $e=2; $f==$g||$h==$i {$s=1;$t=2;$u=3}; $x=6; end{@z=9} /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                1 (strnum_literal).
-    = (srec_assignment):
-        e (field_name).
-        2 (strnum_literal).
-    cond (conditional_block):
-        || (operator):
-            == (operator):
-                f (field_name).
-                g (field_name).
-            == (operator):
-                h (field_name).
-                i (field_name).
-        list (statement_list):
-            = (srec_assignment):
-                s (field_name).
-                1 (strnum_literal).
-            = (srec_assignment):
-                t (field_name).
-                2 (strnum_literal).
-            = (srec_assignment):
-                u (field_name).
-                3 (strnum_literal).
-    = (srec_assignment):
-        x (field_name).
-        6 (strnum_literal).
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    z (string_literal).
-                9 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="1", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="e", type=field_name.
+        text="2", type=strnum_literal.
+    text="cond", type=conditional_block:
+        text="||", type=operator:
+            text="==", type=operator:
+                text="f", type=field_name.
+                text="g", type=field_name.
+            text="==", type=operator:
+                text="h", type=field_name.
+                text="i", type=field_name.
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="s", type=field_name.
+                text="1", type=strnum_literal.
+            text="=", type=srec_assignment:
+                text="t", type=field_name.
+                text="2", type=strnum_literal.
+            text="=", type=srec_assignment:
+                text="u", type=field_name.
+                text="3", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="6", type=strnum_literal.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="z", type=string_literal.
+                text="9", type=strnum_literal.
 
 mlr put -v begin{@a=1}; $e=2; $f==$g||$h==$i {$s=1;@t["u".$5]=2;emitf @v,@w;dump}; $x=6; end{@z=9} /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    a (string_literal).
-                1 (strnum_literal).
-    = (srec_assignment):
-        e (field_name).
-        2 (strnum_literal).
-    cond (conditional_block):
-        || (operator):
-            == (operator):
-                f (field_name).
-                g (field_name).
-            == (operator):
-                h (field_name).
-                i (field_name).
-        list (statement_list):
-            = (srec_assignment):
-                s (field_name).
-                1 (strnum_literal).
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    t (string_literal).
-                    . (operator):
-                        u (strnum_literal).
-                        5 (field_name).
-                2 (strnum_literal).
-            emitf (emitf):
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    w (string_literal).
-            dump (dump):
-    = (srec_assignment):
-        x (field_name).
-        6 (strnum_literal).
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    z (string_literal).
-                9 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="a", type=string_literal.
+                text="1", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="e", type=field_name.
+        text="2", type=strnum_literal.
+    text="cond", type=conditional_block:
+        text="||", type=operator:
+            text="==", type=operator:
+                text="f", type=field_name.
+                text="g", type=field_name.
+            text="==", type=operator:
+                text="h", type=field_name.
+                text="i", type=field_name.
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="s", type=field_name.
+                text="1", type=strnum_literal.
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="t", type=string_literal.
+                    text=".", type=operator:
+                        text="u", type=strnum_literal.
+                        text="5", type=field_name.
+                text="2", type=strnum_literal.
+            text="emitf", type=emitf:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="w", type=string_literal.
+            text="dump", type=dump:
+    text="=", type=srec_assignment:
+        text="x", type=field_name.
+        text="6", type=strnum_literal.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="z", type=string_literal.
+                text="9", type=strnum_literal.
 
 mlr put -v begin{true{@x=1}}; true{@x=2}; end{true{@x=3}} /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            cond (conditional_block):
-                true (boolean_literal).
-                list (statement_list):
-                    = (oosvar_assignment):
-                        oosvar_keylist (oosvar_keylist):
-                            x (string_literal).
-                        1 (strnum_literal).
-    cond (conditional_block):
-        true (boolean_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    x (string_literal).
-                2 (strnum_literal).
-    end (end):
-        list (statement_list):
-            cond (conditional_block):
-                true (boolean_literal).
-                list (statement_list):
-                    = (oosvar_assignment):
-                        oosvar_keylist (oosvar_keylist):
-                            x (string_literal).
-                        3 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="cond", type=conditional_block:
+                text="true", type=boolean_literal.
+                text="list", type=statement_list:
+                    text="=", type=oosvar_assignment:
+                        text="oosvar_keylist", type=oosvar_keylist:
+                            text="x", type=string_literal.
+                        text="1", type=strnum_literal.
+    text="cond", type=conditional_block:
+        text="true", type=boolean_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="x", type=string_literal.
+                text="2", type=strnum_literal.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="cond", type=conditional_block:
+                text="true", type=boolean_literal.
+                text="list", type=statement_list:
+                    text="=", type=oosvar_assignment:
+                        text="oosvar_keylist", type=oosvar_keylist:
+                            text="x", type=string_literal.
+                        text="3", type=strnum_literal.
 
 
 ================================================================
@@ -15021,19 +15021,19 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 3
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                1 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    2 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    3 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="1", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="2", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="3", type=strnum_literal.
 i=1,x=2,y=3
 i=2,x=102,y=202
 i=3,x=103,y=203
@@ -15084,27 +15084,27 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 1008
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                4 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    5 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    6 (strnum_literal).
-        else (if_item):
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    1007 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    1008 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="4", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="5", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="6", type=strnum_literal.
+        text="else", type=if_item:
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="1007", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="1008", type=strnum_literal.
 i=1,x=1007,y=1008
 i=2,x=1007,y=1008
 i=3,x=1007,y=1008
@@ -15158,38 +15158,38 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 1016
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                9 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    10 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    11 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                12 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    13 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    14 (strnum_literal).
-        else (if_item):
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    1015 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    1016 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="9", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="10", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="11", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="12", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="13", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="14", type=strnum_literal.
+        text="else", type=if_item:
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="1015", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="1016", type=strnum_literal.
 i=1,x=1015,y=1016
 i=2,x=1015,y=1016
 i=3,x=1015,y=1016
@@ -15246,49 +15246,49 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 1027
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                17 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    18 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    19 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                20 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    21 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    22 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                23 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    24 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    25 (strnum_literal).
-        else (if_item):
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    1026 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    1027 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="17", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="18", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="19", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="20", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="21", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="22", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="23", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="24", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="25", type=strnum_literal.
+        text="else", type=if_item:
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="1026", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="1027", type=strnum_literal.
 i=1,x=1026,y=1027
 i=2,x=1026,y=1027
 i=3,x=1026,y=1027
@@ -15348,60 +15348,60 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 1041
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                28 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    29 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    30 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                31 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    32 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    33 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                34 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    35 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    36 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                37 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    38 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    39 (strnum_literal).
-        else (if_item):
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    1040 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    1041 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="28", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="29", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="30", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="31", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="32", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="33", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="34", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="35", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="36", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="37", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="38", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="39", type=strnum_literal.
+        text="else", type=if_item:
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="1040", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="1041", type=strnum_literal.
 i=1,x=1040,y=1041
 i=2,x=1040,y=1041
 i=3,x=1040,y=1041
@@ -15451,19 +15451,19 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 3
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                1 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    2 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    3 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="1", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="2", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="3", type=strnum_literal.
 i=1,x=2,y=3
 i=2,x=102,y=202
 i=3,x=103,y=203
@@ -15514,30 +15514,30 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 9
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                4 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    5 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    6 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                7 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    8 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    9 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="4", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="5", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="6", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="7", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="8", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="9", type=strnum_literal.
 i=1,x=101,y=201
 i=2,x=102,y=202
 i=3,x=103,y=203
@@ -15591,41 +15591,41 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 18
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                10 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    11 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    12 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                13 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    14 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    15 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                16 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    17 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    18 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="10", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="11", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="12", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="13", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="14", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="15", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="16", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="17", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="18", type=strnum_literal.
 i=1,x=101,y=201
 i=2,x=102,y=202
 i=3,x=103,y=203
@@ -15682,52 +15682,52 @@ mlr --from ./reg_test/input/xy40.dkvp put -v
     $y = 30
   }
 AST ROOT:
-list (statement_list):
-    if_head (if_head):
-        if (if_item):
-            == (operator):
-                NR (context_variable).
-                19 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    20 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    21 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                22 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    23 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    24 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                25 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    26 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    37 (strnum_literal).
-        elif (if_item):
-            == (operator):
-                NR (context_variable).
-                28 (strnum_literal).
-            list (statement_list):
-                = (srec_assignment):
-                    x (field_name).
-                    29 (strnum_literal).
-                = (srec_assignment):
-                    y (field_name).
-                    30 (strnum_literal).
+text="list", type=statement_list:
+    text="if_head", type=if_head:
+        text="if", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="19", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="20", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="21", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="22", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="23", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="24", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="25", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="26", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="37", type=strnum_literal.
+        text="elif", type=if_item:
+            text="==", type=operator:
+                text="NR", type=context_variable.
+                text="28", type=strnum_literal.
+            text="list", type=statement_list:
+                text="=", type=srec_assignment:
+                    text="x", type=field_name.
+                    text="29", type=strnum_literal.
+                text="=", type=srec_assignment:
+                    text="y", type=field_name.
+                    text="30", type=strnum_literal.
 i=1,x=101,y=201
 i=2,x=102,y=202
 i=3,x=103,y=203
@@ -15775,17 +15775,17 @@ DSL INDIRECT SREC ASSIGNMENTS
 
 mlr put -v $["a"] = $["b"]; $["x"] = 10 * $["y"] ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (indirect_srec_assignment):
-        a (strnum_literal).
-        indirect_field_name (indirect_field_name):
-            b (strnum_literal).
-    = (indirect_srec_assignment):
-        x (strnum_literal).
-        * (operator):
-            10 (strnum_literal).
-            indirect_field_name (indirect_field_name):
-                y (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=indirect_srec_assignment:
+        text="a", type=strnum_literal.
+        text="indirect_field_name", type=indirect_field_name:
+            text="b", type=strnum_literal.
+    text="=", type=indirect_srec_assignment:
+        text="x", type=strnum_literal.
+        text="*", type=operator:
+            text="10", type=strnum_literal.
+            text="indirect_field_name", type=indirect_field_name:
+                text="y", type=strnum_literal.
 a=pan,b=pan,i=1,x=7.268029,y=0.7268028627434533
 a=pan,b=pan,i=2,x=5.221511,y=0.5221511083334797
 a=wye,b=wye,i=3,x=3.383185,y=0.33831852551664776
@@ -15815,24 +15815,24 @@ DSL INDIRECT OOSVAR ASSIGNMENTS
 
 mlr --opprint put -v @s = NR; $t = @s; $u=@["s"]; $v = $t - $u ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            s (string_literal).
-        NR (context_variable).
-    = (srec_assignment):
-        t (field_name).
-        oosvar_keylist (oosvar_keylist):
-            s (string_literal).
-    = (srec_assignment):
-        u (field_name).
-        oosvar_keylist (oosvar_keylist):
-            s (strnum_literal).
-    = (srec_assignment):
-        v (field_name).
-        - (operator):
-            t (field_name).
-            u (field_name).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="s", type=string_literal.
+        text="NR", type=context_variable.
+    text="=", type=srec_assignment:
+        text="t", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="s", type=string_literal.
+    text="=", type=srec_assignment:
+        text="u", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="s", type=strnum_literal.
+    text="=", type=srec_assignment:
+        text="v", type=field_name.
+        text="-", type=operator:
+            text="t", type=field_name.
+            text="u", type=field_name.
 a   b   i  x                   y                   t  u  v
 pan pan 1  0.3467901443380824  0.7268028627434533  1  1  0
 eks pan 2  0.7586799647899636  0.5221511083334797  2  2  0
@@ -15847,19 +15847,19 @@ pan wye 10 0.5026260055412137  0.9526183602969864  10 10 0
 
 mlr put -v @t["u"] = NR; $tu = @["t"]["u"]; emitp all ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            t (string_literal).
-            u (strnum_literal).
-        NR (context_variable).
-    = (srec_assignment):
-        tu (field_name).
-        oosvar_keylist (oosvar_keylist):
-            t (strnum_literal).
-            u (strnum_literal).
-    emitp (emitp):
-        all (all).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="t", type=string_literal.
+            text="u", type=strnum_literal.
+        text="NR", type=context_variable.
+    text="=", type=srec_assignment:
+        text="tu", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="t", type=strnum_literal.
+            text="u", type=strnum_literal.
+    text="emitp", type=emitp:
+        text="all", type=all.
 t:u=1
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,tu=1
 t:u=2
@@ -15883,19 +15883,19 @@ a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,tu=10
 
 mlr put -v @t["u"] = NR; $tu = @["t"]["u"]; emitp @* ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            t (string_literal).
-            u (strnum_literal).
-        NR (context_variable).
-    = (srec_assignment):
-        tu (field_name).
-        oosvar_keylist (oosvar_keylist):
-            t (strnum_literal).
-            u (strnum_literal).
-    emitp (emitp):
-        @* (full_oosvar).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="t", type=string_literal.
+            text="u", type=strnum_literal.
+        text="NR", type=context_variable.
+    text="=", type=srec_assignment:
+        text="tu", type=field_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="t", type=strnum_literal.
+            text="u", type=strnum_literal.
+    text="emitp", type=emitp:
+        text="@*", type=full_oosvar.
 t:u=1
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,tu=1
 t:u=2
@@ -15919,13 +15919,13 @@ a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,tu=10
 
 mlr put -v @["s"] = $x; emitp all ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            s (strnum_literal).
-        x (field_name).
-    emitp (emitp):
-        all (all).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="s", type=strnum_literal.
+        text="x", type=field_name.
+    text="emitp", type=emitp:
+        text="all", type=all.
 s=0.346790
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 s=0.758680
@@ -15949,14 +15949,14 @@ a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
 mlr put -v @["t"]["u"] = $y; emitp all ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            t (strnum_literal).
-            u (strnum_literal).
-        y (field_name).
-    emitp (emitp):
-        all (all).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="t", type=strnum_literal.
+            text="u", type=strnum_literal.
+        text="y", type=field_name.
+    text="emitp", type=emitp:
+        text="all", type=all.
 t:u=0.726803
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 t:u=0.522151
@@ -15984,17 +15984,17 @@ DSL WHILE/DO-WHILE LOOPS
 
 mlr put -v while($i < 5) { $i += 1} ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    while (while):
-        < (operator):
-            i (field_name).
-            5 (strnum_literal).
-        list (statement_list):
-            = (srec_assignment):
-                i (field_name).
-                + (operator):
-                    i (field_name).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="while", type=while:
+        text="<", type=operator:
+            text="i", type=field_name.
+            text="5", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="i", type=field_name.
+                text="+", type=operator:
+                    text="i", type=field_name.
+                    text="1", type=strnum_literal.
 a=pan,b=pan,i=5,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=5,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=5,x=0.20460330576630303,y=0.33831852551664776
@@ -16008,17 +16008,17 @@ a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
 mlr put -v do {$i += 1} while($i < 5) ./reg_test/input/abixy
 AST ROOT:
-list (statement_list):
-    do (do_while):
-        list (statement_list):
-            = (srec_assignment):
-                i (field_name).
-                + (operator):
-                    i (field_name).
-                    1 (strnum_literal).
-        < (operator):
-            i (field_name).
-            5 (strnum_literal).
+text="list", type=statement_list:
+    text="do", type=do_while:
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="i", type=field_name.
+                text="+", type=operator:
+                    text="i", type=field_name.
+                    text="1", type=strnum_literal.
+        text="<", type=operator:
+            text="i", type=field_name.
+            text="5", type=strnum_literal.
 a=pan,b=pan,i=5,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=5,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=5,x=0.20460330576630303,y=0.33831852551664776
@@ -16038,12 +16038,12 @@ DSL FOR-SREC LOOPS
 ---------------------------------------------------------------- empty for-srec
 mlr --from ./reg_test/input/abixy put -v for(k,v in $*) { }
 AST ROOT:
-list (statement_list):
-    for (for_srec):
-        variables (for_variables):
-            k (non_sigil_name).
-            v (non_sigil_name).
-        list (statement_list):
+text="list", type=statement_list:
+    text="for", type=for_srec:
+        text="variables", type=for_variables:
+            text="k", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="list", type=statement_list:
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -16059,15 +16059,15 @@ a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 ---------------------------------------------------------------- for-srec without boundvars
 mlr --from ./reg_test/input/abixy put -v for(k,v in $*) {$nr= NR}
 AST ROOT:
-list (statement_list):
-    for (for_srec):
-        variables (for_variables):
-            k (non_sigil_name).
-            v (non_sigil_name).
-        list (statement_list):
-            = (srec_assignment):
-                nr (field_name).
-                NR (context_variable).
+text="list", type=statement_list:
+    text="for", type=for_srec:
+        text="variables", type=for_variables:
+            text="k", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="list", type=statement_list:
+            text="=", type=srec_assignment:
+                text="nr", type=field_name.
+                text="NR", type=context_variable.
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,nr=1
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,nr=2
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,nr=3
@@ -16083,18 +16083,18 @@ a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,nr=10
 ---------------------------------------------------------------- for-srec modifying the srec
 mlr --from ./reg_test/input/abixy put -v for(k,v in $*) {unset $[k]}; $j = NR
 AST ROOT:
-list (statement_list):
-    for (for_srec):
-        variables (for_variables):
-            k (non_sigil_name).
-            v (non_sigil_name).
-        list (statement_list):
-            unset (unset):
-                indirect_field_name (indirect_field_name):
-                    k (bound_variable).
-    = (srec_assignment):
-        j (field_name).
-        NR (context_variable).
+text="list", type=statement_list:
+    text="for", type=for_srec:
+        text="variables", type=for_variables:
+            text="k", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="list", type=statement_list:
+            text="unset", type=unset:
+                text="indirect_field_name", type=indirect_field_name:
+                    text="k", type=bound_variable.
+    text="=", type=srec_assignment:
+        text="j", type=field_name.
+        text="NR", type=context_variable.
 j=1
 j=2
 j=3
@@ -16108,24 +16108,24 @@ j=10
 
 mlr --from ./reg_test/input/abixy put -v for(k,v in $*) {if (k != "x") {unset $[k]}}; $j = NR
 AST ROOT:
-list (statement_list):
-    for (for_srec):
-        variables (for_variables):
-            k (non_sigil_name).
-            v (non_sigil_name).
-        list (statement_list):
-            if_head (if_head):
-                if (if_item):
-                    != (operator):
-                        k (bound_variable).
-                        x (strnum_literal).
-                    list (statement_list):
-                        unset (unset):
-                            indirect_field_name (indirect_field_name):
-                                k (bound_variable).
-    = (srec_assignment):
-        j (field_name).
-        NR (context_variable).
+text="list", type=statement_list:
+    text="for", type=for_srec:
+        text="variables", type=for_variables:
+            text="k", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="list", type=statement_list:
+            text="if_head", type=if_head:
+                text="if", type=if_item:
+                    text="!=", type=operator:
+                        text="k", type=bound_variable.
+                        text="x", type=strnum_literal.
+                    text="list", type=statement_list:
+                        text="unset", type=unset:
+                            text="indirect_field_name", type=indirect_field_name:
+                                text="k", type=bound_variable.
+    text="=", type=srec_assignment:
+        text="j", type=field_name.
+        text="NR", type=context_variable.
 x=0.3467901443380824,j=1
 x=0.7586799647899636,j=2
 x=0.20460330576630303,j=3
@@ -16139,20 +16139,20 @@ x=0.5026260055412137,j=10
 
 mlr --from ./reg_test/input/abixy --opprint put -S -v for(k,v in $*) {$[k."_orig"]=v; $[k] = "other"}
 AST ROOT:
-list (statement_list):
-    for (for_srec):
-        variables (for_variables):
-            k (non_sigil_name).
-            v (non_sigil_name).
-        list (statement_list):
-            = (indirect_srec_assignment):
-                . (operator):
-                    k (bound_variable).
-                    _orig (strnum_literal).
-                v (bound_variable).
-            = (indirect_srec_assignment):
-                k (bound_variable).
-                other (strnum_literal).
+text="list", type=statement_list:
+    text="for", type=for_srec:
+        text="variables", type=for_variables:
+            text="k", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="list", type=statement_list:
+            text="=", type=indirect_srec_assignment:
+                text=".", type=operator:
+                    text="k", type=bound_variable.
+                    text="_orig", type=strnum_literal.
+                text="v", type=bound_variable.
+            text="=", type=indirect_srec_assignment:
+                text="k", type=bound_variable.
+                text="other", type=strnum_literal.
 a     b     i     x     y     a_orig b_orig i_orig x_orig              y_orig
 other other other other other pan    pan    1      0.3467901443380824  0.7268028627434533
 other other other other other eks    pan    2      0.7586799647899636  0.5221511083334797
@@ -16167,15 +16167,15 @@ other other other other other pan    wye    10     0.5026260055412137  0.9526183
 
 mlr --from ./reg_test/input/abixy put -S -v for(k,v in $*) {$[v]=k}
 AST ROOT:
-list (statement_list):
-    for (for_srec):
-        variables (for_variables):
-            k (non_sigil_name).
-            v (non_sigil_name).
-        list (statement_list):
-            = (indirect_srec_assignment):
-                v (bound_variable).
-                k (bound_variable).
+text="list", type=statement_list:
+    text="for", type=for_srec:
+        text="variables", type=for_variables:
+            text="k", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="list", type=statement_list:
+            text="=", type=indirect_srec_assignment:
+                text="v", type=bound_variable.
+                text="k", type=bound_variable.
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,pan=b,1=i,0.3467901443380824=x,0.7268028627434533=y
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,eks=a,pan=b,2=i,0.7586799647899636=x,0.5221511083334797=y
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,wye=b,3=i,0.20460330576630303=x,0.33831852551664776=y
@@ -16195,27 +16195,27 @@ mlr --from ./reg_test/input/abixy put -v
     }
   }
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        sum (field_name).
-        0 (strnum_literal).
-    for (for_srec):
-        variables (for_variables):
-            k (non_sigil_name).
-            v (non_sigil_name).
-        list (statement_list):
-            if_head (if_head):
-                if (if_item):
-                    =~ (operator):
-                        k (bound_variable).
-                        ^[xy]$ (strnum_literal).
-                    list (statement_list):
-                        = (srec_assignment):
-                            sum (field_name).
-                            + (operator):
-                                sum (field_name).
-                                indirect_field_name (indirect_field_name):
-                                    k (bound_variable).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="sum", type=field_name.
+        text="0", type=strnum_literal.
+    text="for", type=for_srec:
+        text="variables", type=for_variables:
+            text="k", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="list", type=statement_list:
+            text="if_head", type=if_head:
+                text="if", type=if_item:
+                    text="=~", type=operator:
+                        text="k", type=bound_variable.
+                        text="^[xy]$", type=strnum_literal.
+                    text="list", type=statement_list:
+                        text="=", type=srec_assignment:
+                            text="sum", type=field_name.
+                            text="+", type=operator:
+                                text="sum", type=field_name.
+                                text="indirect_field_name", type=indirect_field_name:
+                                    text="k", type=bound_variable.
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,sum=1.073593
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,sum=1.280831
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,sum=0.542922
@@ -16235,29 +16235,29 @@ mlr --from ./reg_test/input/abixy put -S -v
     }
   }
 AST ROOT:
-list (statement_list):
-    = (srec_assignment):
-        sum (field_name).
-        float (non_sigil_name):
-            0 (strnum_literal).
-    for (for_srec):
-        variables (for_variables):
-            k (non_sigil_name).
-            v (non_sigil_name).
-        list (statement_list):
-            if_head (if_head):
-                if (if_item):
-                    =~ (operator):
-                        k (bound_variable).
-                        ^[xy]$ (strnum_literal).
-                    list (statement_list):
-                        = (srec_assignment):
-                            sum (field_name).
-                            + (operator):
-                                sum (field_name).
-                                float (non_sigil_name):
-                                    indirect_field_name (indirect_field_name):
-                                        k (bound_variable).
+text="list", type=statement_list:
+    text="=", type=srec_assignment:
+        text="sum", type=field_name.
+        text="float", type=non_sigil_name:
+            text="0", type=strnum_literal.
+    text="for", type=for_srec:
+        text="variables", type=for_variables:
+            text="k", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="list", type=statement_list:
+            text="if_head", type=if_head:
+                text="if", type=if_item:
+                    text="=~", type=operator:
+                        text="k", type=bound_variable.
+                        text="^[xy]$", type=strnum_literal.
+                    text="list", type=statement_list:
+                        text="=", type=srec_assignment:
+                            text="sum", type=field_name.
+                            text="+", type=operator:
+                                text="sum", type=field_name.
+                                text="float", type=non_sigil_name:
+                                    text="indirect_field_name", type=indirect_field_name:
+                                        text="k", type=bound_variable.
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,sum=1.073593
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,sum=1.280831
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,sum=0.542922
@@ -16285,61 +16285,61 @@ mlr --opprint -n put -v
   }
 
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            o (string_literal).
-            1 (strnum_literal).
-            1 (strnum_literal).
-            text1 (strnum_literal).
-            NR (context_variable).
-        a (field_name).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            o (string_literal).
-            1 (strnum_literal).
-            2 (strnum_literal).
-            text2 (strnum_literal).
-            NR (context_variable).
-        b (field_name).
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            o (string_literal).
-            1 (strnum_literal).
-            2 (strnum_literal).
-            a (field_name).
-            * (operator):
-                i (field_name).
-                100 (strnum_literal).
-        x (field_name).
-    for (for_oosvar):
-        key_and_value_variables (for_variables):
-            key_variables (for_variables):
-                k1 (non_sigil_name).
-                k2 (non_sigil_name).
-            v (non_sigil_name).
-        oosvar_keylist (oosvar_keylist):
-            o (string_literal).
-            1 (strnum_literal).
-            2 (strnum_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    n (string_literal).
-                    3 (strnum_literal).
-                    4 (strnum_literal).
-                    k2 (bound_variable).
-                    k1 (bound_variable).
-                v (bound_variable).
-    end (end):
-        list (statement_list):
-            emit (emit):
-                oosvar_keylist (oosvar_keylist):
-                    n (string_literal).
-                a (strnum_literal).
-                b (strnum_literal).
-                c (strnum_literal).
-                d (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="o", type=string_literal.
+            text="1", type=strnum_literal.
+            text="1", type=strnum_literal.
+            text="text1", type=strnum_literal.
+            text="NR", type=context_variable.
+        text="a", type=field_name.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="o", type=string_literal.
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+            text="text2", type=strnum_literal.
+            text="NR", type=context_variable.
+        text="b", type=field_name.
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="o", type=string_literal.
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+            text="a", type=field_name.
+            text="*", type=operator:
+                text="i", type=field_name.
+                text="100", type=strnum_literal.
+        text="x", type=field_name.
+    text="for", type=for_oosvar:
+        text="key_and_value_variables", type=for_variables:
+            text="key_variables", type=for_variables:
+                text="k1", type=non_sigil_name.
+                text="k2", type=non_sigil_name.
+            text="v", type=non_sigil_name.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="o", type=string_literal.
+            text="1", type=strnum_literal.
+            text="2", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="n", type=string_literal.
+                    text="3", type=strnum_literal.
+                    text="4", type=strnum_literal.
+                    text="k2", type=bound_variable.
+                    text="k1", type=bound_variable.
+                text="v", type=bound_variable.
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="emit", type=emit:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="n", type=string_literal.
+                text="a", type=strnum_literal.
+                text="b", type=strnum_literal.
+                text="c", type=strnum_literal.
+                text="d", type=strnum_literal.
 
 mlr --opprint --from ./reg_test/input/abixy put -q 
   @o[1][1]["text1"][NR] = $a;
@@ -23166,70 +23166,70 @@ OOSVAR-FROM-SREC ASSIGNMENT
 
 mlr put -v @v     = $* /dev/null
 AST ROOT:
-list (statement_list):
-    = (oosvar_from_full_srec_assignment):
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
-        $* (full_srec).
+text="list", type=statement_list:
+    text="=", type=oosvar_from_full_srec_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
+        text="$*", type=full_srec.
 
 mlr put -v @v[1]  = $* /dev/null
 AST ROOT:
-list (statement_list):
-    = (oosvar_from_full_srec_assignment):
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
-            1 (strnum_literal).
-        $* (full_srec).
+text="list", type=statement_list:
+    text="=", type=oosvar_from_full_srec_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
+            text="1", type=strnum_literal.
+        text="$*", type=full_srec.
 
 mlr put -v @v[$2] = $* /dev/null
 AST ROOT:
-list (statement_list):
-    = (oosvar_from_full_srec_assignment):
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
-            2 (field_name).
-        $* (full_srec).
+text="list", type=statement_list:
+    text="=", type=oosvar_from_full_srec_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
+            text="2", type=field_name.
+        text="$*", type=full_srec.
 
 mlr put -v NR == 3 {@v     = $*} /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (oosvar_from_full_srec_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                $* (full_srec).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_from_full_srec_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                text="$*", type=full_srec.
 
 mlr put -v NR == 3 {@v[1]  = $*} /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (oosvar_from_full_srec_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    1 (strnum_literal).
-                $* (full_srec).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_from_full_srec_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="1", type=strnum_literal.
+                text="$*", type=full_srec.
 
 mlr put -v NR == 3 {@v[$2] = $*} /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (oosvar_from_full_srec_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    2 (field_name).
-                $* (full_srec).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_from_full_srec_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="2", type=field_name.
+                text="$*", type=full_srec.
 
 mlr --oxtab put -q @v = $*; end {emitp @v } ./reg_test/input/abixy-het
 v:a pan
@@ -23433,70 +23433,70 @@ SREC-FROM-OOSVAR ASSIGNMENT
 
 mlr put -v $* = @v     /dev/null
 AST ROOT:
-list (statement_list):
-    = (full_srec_from_oosvar_assignment):
-        $* (full_srec).
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
+text="list", type=statement_list:
+    text="=", type=full_srec_from_oosvar_assignment:
+        text="$*", type=full_srec.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
 
 mlr put -v $* = @v[1]  /dev/null
 AST ROOT:
-list (statement_list):
-    = (full_srec_from_oosvar_assignment):
-        $* (full_srec).
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=full_srec_from_oosvar_assignment:
+        text="$*", type=full_srec.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
+            text="1", type=strnum_literal.
 
 mlr put -v $* = @v[$2] /dev/null
 AST ROOT:
-list (statement_list):
-    = (full_srec_from_oosvar_assignment):
-        $* (full_srec).
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
-            2 (field_name).
+text="list", type=statement_list:
+    text="=", type=full_srec_from_oosvar_assignment:
+        text="$*", type=full_srec.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
+            text="2", type=field_name.
 
 mlr put -v NR == 3 {$* = @v    } /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (full_srec_from_oosvar_assignment):
-                $* (full_srec).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=full_srec_from_oosvar_assignment:
+                text="$*", type=full_srec.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
 
 mlr put -v NR == 3 {$* = @v[1] } /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (full_srec_from_oosvar_assignment):
-                $* (full_srec).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=full_srec_from_oosvar_assignment:
+                text="$*", type=full_srec.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="1", type=strnum_literal.
 
 mlr put -v NR == 3 {$* = @v[$2]} /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (full_srec_from_oosvar_assignment):
-                $* (full_srec).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    2 (field_name).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=full_srec_from_oosvar_assignment:
+                text="$*", type=full_srec.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="2", type=field_name.
 
 mlr put @v[NR] = $a; NR == 7 { @v = $*} ; $* = @v ./reg_test/input/abixy-het
 1=pan
@@ -23516,199 +23516,199 @@ OOSVAR-FROM-OOSVAR ASSIGNMENT
 
 mlr put -v @u    = @v /dev/null
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            u (string_literal).
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="u", type=string_literal.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
 
 mlr put -v @u    = @v[1] /dev/null
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            u (string_literal).
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="u", type=string_literal.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
+            text="1", type=strnum_literal.
 
 mlr put -v @u[2] = @v /dev/null
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            u (string_literal).
-            2 (strnum_literal).
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="u", type=string_literal.
+            text="2", type=strnum_literal.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
 
 mlr put -v @u[2] = @v[1] /dev/null
 AST ROOT:
-list (statement_list):
-    = (oosvar_assignment):
-        oosvar_keylist (oosvar_keylist):
-            u (string_literal).
-            2 (strnum_literal).
-        oosvar_keylist (oosvar_keylist):
-            v (string_literal).
-            1 (strnum_literal).
+text="list", type=statement_list:
+    text="=", type=oosvar_assignment:
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="u", type=string_literal.
+            text="2", type=strnum_literal.
+        text="oosvar_keylist", type=oosvar_keylist:
+            text="v", type=string_literal.
+            text="1", type=strnum_literal.
 
 mlr put -v begin { @u    = @v } /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
 
 mlr put -v begin { @u    = @v[1] } /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="1", type=strnum_literal.
 
 mlr put -v begin { @u[2] = @v } /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                    2 (strnum_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                    text="2", type=strnum_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
 
 mlr put -v begin { @u[2] = @v[1] } /dev/null
 AST ROOT:
-list (statement_list):
-    begin (begin):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                    2 (strnum_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="begin", type=begin:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                    text="2", type=strnum_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="1", type=strnum_literal.
 
 mlr put -v NR == 3 { @u    = @v } /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
 
 mlr put -v NR == 3 { @u    = @v[1] } /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="1", type=strnum_literal.
 
 mlr put -v NR == 3 { @u[2] = @v } /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                    2 (strnum_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                    text="2", type=strnum_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
 
 mlr put -v NR == 3 { @u[2] = @v[1] } /dev/null
 AST ROOT:
-list (statement_list):
-    cond (conditional_block):
-        == (operator):
-            NR (context_variable).
-            3 (strnum_literal).
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                    2 (strnum_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="cond", type=conditional_block:
+        text="==", type=operator:
+            text="NR", type=context_variable.
+            text="3", type=strnum_literal.
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                    text="2", type=strnum_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="1", type=strnum_literal.
 
 mlr put -v end { @u    = @v } /dev/null
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
 
 mlr put -v end { @u    = @v[1] } /dev/null
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="1", type=strnum_literal.
 
 mlr put -v end { @u[2] = @v } /dev/null
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                    2 (strnum_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                    text="2", type=strnum_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
 
 mlr put -v end { @u[2] = @v[1] } /dev/null
 AST ROOT:
-list (statement_list):
-    end (end):
-        list (statement_list):
-            = (oosvar_assignment):
-                oosvar_keylist (oosvar_keylist):
-                    u (string_literal).
-                    2 (strnum_literal).
-                oosvar_keylist (oosvar_keylist):
-                    v (string_literal).
-                    1 (strnum_literal).
+text="list", type=statement_list:
+    text="end", type=end:
+        text="list", type=statement_list:
+            text="=", type=oosvar_assignment:
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="u", type=string_literal.
+                    text="2", type=strnum_literal.
+                text="oosvar_keylist", type=oosvar_keylist:
+                    text="v", type=string_literal.
+                    text="1", type=strnum_literal.
 
 mlr put -q @s    += $i; @t=@s;             end{dump; emitp@s; emitp @t} ./reg_test/input/abixy
 {