Re: perl regular expression grammar

alan@oursland.net (Alan Oursland)
23 Jul 2001 02:18:02 -0400

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From: alan@oursland.net (Alan Oursland)
Newsgroups: comp.lang.perl.misc,comp.compilers
Date: 23 Jul 2001 02:18:02 -0400
Organization: SBC Internet Services
References: 01-07-080 01-07-101
Keywords: parse
Posted-Date: 23 Jul 2001 02:18:01 EDT

Thank you for the feedback. It is very helpful.


On 18 Jul 2001 20:02:27 -0400, abigail@foad.org (Abigail) wrote:
>(why are "+", "&", "`" and "'" mentioned in <backoctal>?)


Octal codes are sometimes interpreted as back-references. I didn't know how to
separate octal codes from the back-references in the grammar since it seems to
be context sensitive, so I combined them into one production. The extra
characters are other ways of referring to back-references.


Alan

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