problem in access to variable with same name in Semantic actions

[mmasomi73]

Hi i have a problem in access to variable that have same name, for example:

term: term ('*'|'/')factor {print($term.text);}| factor;

take this error missing attribute access on rule reference term in $term how to fix this problem?

[ericvergnaud]

Hi the place for support is the google discussion group

Le 30 nov. 2019 à 01:24, meysam notifications@github.com a écrit :

Hi i have a problem in access to variable that have same name, for example:

term: term ('*'|'/')factor {print($term.text);}| factor;

take this error missing attribute access on rule reference term in $term how to fix this problem?

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[sharwell]

I would have expected this to be fixed by #630 for ANTLR 4.3.

@mmasomi73 do you know what version you are using?

[mmasomi73]

ANTRL 4.7.2

[sharwell]

@mmasomi73 Can you post a complete grammar that produces this result? If your full grammar cannot be public, then a constructed sample grammar would work.

[mmasomi73]

if this sample code has work, my main grammar can work,

`grammar Expr;

@parser::members{ int temp = 0; String newTemp(){ return "t"+ ++temp; } void print(String s){ System.out.println(s); } }

prog: ID '=' expr EOF;

expr returns [String t,String op]: e=expr ('+'{$op = "+";}|'-'{$op = "-";}) term { print($expr.text+"|"+$e.text);} | term; term returns [String t,String op]: term ('*'|'/')factor | factor; factor:'('expr')'|ID|NUM;

NUM : [0-9]+ ; ID: [a-zA-Z]+ ; WS : [ \t\r\n]+ -> skip;`

i need to access left and right value of expr

[sharwell]

The issue occurs in this line:

{ print($expr.text+"|"+$e.text);} | term;

You cannot reference the containing rule by its name (it has a special reserved name $ctx), so you need to change this action to the following:

-{ print($expr.text+"|"+$e.text);} | term;
+{ print($ctx.text+"|"+$e.text);} | term;