Mirrors/miller
1
0
Fork 0
mirror of https://github.com/johnkerl/miller.git synced 2026-08-02 04:22:59 +00:00
Code Issues Projects Releases Wiki Activity

AST-interpreter iterate

Browse source
This commit is contained in:
John Kerl 2020-08-30 19:17:58 -04:00
parent a6ad23732b
commit b26a47ddfe
1 changed files with 43 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

44
go/src/miller/dsl/interpreter.go
View file

@ -114,7 +114,8 @@ func (this *Interpreter) evaluateNode(
break
case NodeTypeOperator:
this.checkArity(node, 2) // xxx temp -- binary-only for now
return "", errors.New("unhandled")
return this.evaluateBinaryOperatorNode(node, node.Children[0], node.Children[1],
inrec, context)
break
case NodeTypeContextVariable:
return this.evaluateContextVariableNode(node, context)
@ -151,3 +152,44 @@ func (this *Interpreter) evaluateContextVariableNode(
}
return "", errors.New("internal coding error") // xxx libify
}
func (this *Interpreter) evaluateBinaryOperatorNode(
node *ASTNode,
leftChild *ASTNode,
rightChild *ASTNode,
inrec *containers.Lrec,
context *runtime.Context,
) (string, error) {
sval := string(node.Token.Lit)
leftValue, leftErr := this.evaluateNode(leftChild, inrec, context)
if leftErr != nil {
return "", leftErr
}
rightValue, rightErr := this.evaluateNode(rightChild, inrec, context)
if rightErr != nil {
return "", rightErr
}
switch sval {
case ".":
return leftValue + rightValue, nil
break
case "+":
return "", errors.New("unhandled")
break
case "-":
return "", errors.New("unhandled")
break
case "*":
return "", errors.New("unhandled")
break
case "/":
return "", errors.New("unhandled")
break
case "//":
return "", errors.New("unhandled")
break
}
return "", errors.New("internal coding error") // xxx libify
}