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This queue is for tickets about the Regexp-Grammars CPAN distribution.

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The Basics
Id: 69249
Status: open
Priority: 0/
Queue: Regexp-Grammars

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Owner: Nobody in particular
Requestors: XLAT [...] cpan.org
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Severity: (no value)
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Subject: better/prettier error handling
Date: Sat, 2 Jul 2011 20:44:01 +0200
To: bug-regexp-grammars [...] rt.cpan.org
From: "Nicolas GEORGES (CPAN)" <xlat [...] cpan.org>
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For exemple, when running the following: C:\perl510\geni\Regexp-Grammars-1.013\demo>perl demo_error.pl 1+2-5x5 Extra junk after expression at index 1: '+2-5x5' Expected end of input, but found '+2-5x5' instead Expected valid input, but found '+2-5x5' instead Expected literal, but found '1+2-5x5' instead Expected valid arithmetic expression, but found '1+2-5x5' instead I would like to produce a message like : Extra junk after expression at index 5: 'x5' or 1+2-5x5 .....^__ Expected valid arithmetic expression May be I miss something like <commit> that is available in Parse::RecDescent ? In which case I could insert it at the right place in the grammar. TIA, Nicolas.
Subject: Re: [rt.cpan.org #69249] better/prettier error handling
Date: Mon, 4 Jul 2011 09:36:46 +1000
To: bug-Regexp-Grammars [...] rt.cpan.org
From: Damian Conway <damian [...] conway.org>
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Hi Nicolas, You asked: Show quoted text
> May be I miss something like <commit> that is available in Parse::RecDescent? > In which case I could insert it at the right place in the grammar.
That's exactly right. Regexp::Grammars doesn't provide a <commit>, because it doesn't need to: Perl itself does (in 5.10 and later, at least). You should get the behaviour you want by changing the lines: \A <Answer> to \A <Answer> (*COMMIT) You can read about (*COMMIT) in the perlre manpage. All the best, Damian


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