I've got a problem with Parse::RecDescent where it doesn't appear to be passing on subrule arguments. The grammar works fine otherwise, but the "parameter" rule does not seem to get any value for $arg[0], which should contain the name of the function matched in the "functiondefine" rule.

This is simplified example, but it is the basics of the problem...

use Parse::RecDescent;

$grammar = << 'STOP';
functiondefine:    /function/i name "(" parameter[ $item[2] ](s? /,/) 
+")" "{"

name:            /[A-Za-z][a-zA-Z0-9_]*/

parameter:        name /as/i variabletype
                { warn $arg[0] }

variabletype:    /variant/i | /array/i | /keyarray/i
STOP

$parser = new Parse::RecDescent($grammar);


$text = << 'STOP';
function myfunction(something as variant, somethingelse as array, foo 
+as keyarray) {

}
STOP

$parser->functiondefine($text);

[download]

The result of which is...

Warning: something's wrong at (eval 15) line 168.
Warning: something's wrong at (eval 15) line 168.
Warning: something's wrong at (eval 15) line 168.

Meaning that $arg[0] isn't getting set.

In reply to Problem with Parse::RecDescent and subrule arguments by richard5mith

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