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semicolon iterate

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This commit is contained in:
John Kerl 2016-05-23 09:16:46 -04:00
parent 12cab51b4a
commit 6a35e1bec4
1 changed files with 15 additions and 5 deletions
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20
c/dsls/mlr_dsl_parse.y
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@ -68,15 +68,25 @@ md_statement_list(A) ::= md_statement(B). {
A = mlr_dsl_ast_node_alloc_unary("list", MD_AST_NODE_TYPE_STATEMENT_LIST, B);
}
}
md_statement_list(A) ::= md_statement_list(B) MD_TOKEN_SEMICOLON md_statement(C). {
if (C->type == MD_AST_NODE_TYPE_NOP) {
A = B;
//md_statement_list(A) ::= md_statement_list(B) MD_TOKEN_SEMICOLON md_statement(C). {
// if (C->type == MD_AST_NODE_TYPE_NOP) {
// A = B;
// } else {
// A = mlr_dsl_ast_node_append_arg(B, C);
// }
//}
// xxx cmt why prepend not postpend
md_statement_list(A) ::= md_statement(B) MD_TOKEN_SEMICOLON md_statement_list(C). {
if (B->type == MD_AST_NODE_TYPE_NOP) {
A = C;
} else {
A = mlr_dsl_ast_node_append_arg(B, C);
A = mlr_dsl_ast_node_prepend_arg(C, B);
}
//mlr_dsl_ast_node_print(C);
}
// This allows for trailing semicolon, as well as empty string (or whitespace) between semicolons:
md_statement(A) ::= . {
A = mlr_dsl_ast_node_alloc_zary("nop", MD_AST_NODE_TYPE_NOP);