[antlr-interest] Interating over a list in an AST

[Jim Idle]

If you just want to print them, then put your action code against the
rule:

 

^(FUNC type ID (fp=formalParameter { System.out.println($fp.text); } )*
block)

 

Jim

 

  _____  

From: Tim Hilgenberg [mailto:tim.hilgenberg at hewitt.com] 
Sent: Tuesday, November 13, 2007 12:36 PM
To: antlr-interest at antlr.org
Subject: [antlr-interest] Interating over a list in an AST

 


I'm trying to figure out how to create a "for" loop around an AST node
that has between zero and n children. I'll use the Cminus walker
example. 

Suppose I wanted to print out all the formal paramaters in the
"function" definition. How do I get the following logic: 

function 
    :   ^(FUNC type ID formalParameter* block) 
       { 
        String formalParmString; 
        for (... interate over "formalParamter*"...) {
formalParameterString = formalParamterString + " "+                     
$formalParameter.text } 
        System.out.println("define "+$type.text+" "+$ID.text+"(" +
formalParmString+ ")");} 
    ; 

formalParameter 
    :   ^(ARG type ID) 
    ; 

  _____  

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