Re: bug#12665: regexp fault for closing square bracket within character class

Re: bug#12665: regexp fault for closing square bracket within character class

[Marijn]

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On 18-10-12 11:44, Panicz Maciej Godek wrote:
>> As documented in "Syntax of Regular Expressions" of the Emacs
>> manual (to which section 6.15 of the Guile manual refers):
>> 
>> To include a `]' in a character set, you must make it the first 
>> character.  For example, `[]a]' matches `]' or `a'.  To include
>> a `-', write `-' as the first or last character of the set, or
>> put it after a range.  Thus, `[]-]' matches both `]' and `-'.
> 
> OK, I see. I guess I got used to PCRE for too long :) Sorry for my
> mistake.

``Regular expressions crammed into string-syntax'' really needs to be
deprecated in Scheme implementations. SRE[1][2] is more expressive and
doesn't suffer from such exceptions.

Marijn

[1]:http://sjamaan.ath.cx/posts/lispy-dsl-sre.html
[2]:http://www.scsh.net/docu/post/sre.html
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Re: bug#12665: regexp fault for closing square bracket within character class

[Mark H Weaver]

Marijn <hkBst@gentoo.org> writes:
> ``Regular expressions crammed into string-syntax'' really needs to be
> deprecated in Scheme implementations. SRE[1][2] is more expressive and
> doesn't suffer from such exceptions.

I wholehearted agree that SRE is far superior, and that we should
implement SRE and strongly encourage its use, but I wouldn't go so far
as to _deprecate_ traditional regexp syntax.  Like it or not, regexp
syntax is burned into the minds of users everywhere, and for many common
cases it is adequate and more concise.

Patches welcome :)

     Mark