* How do I get a ] into a reg exp?
@ 2006-09-13 19:45 Lennart Borgman
2006-09-13 20:16 ` David Hansen
2006-09-13 20:21 ` David Kastrup
0 siblings, 2 replies; 10+ messages in thread
From: Lennart Borgman @ 2006-09-13 19:45 UTC (permalink / raw)
How do I write
(re-search-forward "[a-z\]]")
I mean how do I get the ] into the characters to search for? It works if
I remove a-z. Looks like a bug to me.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: How do I get a ] into a reg exp?
2006-09-13 19:45 How do I get a ] into a reg exp? Lennart Borgman
@ 2006-09-13 20:16 ` David Hansen
2006-09-13 20:26 ` David Kastrup
2006-09-13 20:21 ` David Kastrup
1 sibling, 1 reply; 10+ messages in thread
From: David Hansen @ 2006-09-13 20:16 UTC (permalink / raw)
On Wed, 13 Sep 2006 21:45:58 +0200 Lennart Borgman wrote:
> How do I write
>
> (re-search-forward "[a-z\]]")
"[][]" looks odd but works for me. But IMHO that should be "[\\[\\]]".
David
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: How do I get a ] into a reg exp?
2006-09-13 19:45 How do I get a ] into a reg exp? Lennart Borgman
2006-09-13 20:16 ` David Hansen
@ 2006-09-13 20:21 ` David Kastrup
2006-09-13 21:31 ` Lennart Borgman
1 sibling, 1 reply; 10+ messages in thread
From: David Kastrup @ 2006-09-13 20:21 UTC (permalink / raw)
Cc: Emacs Devel
Lennart Borgman <lennart.borgman.073@student.lu.se> writes:
> How do I write
>
> (re-search-forward "[a-z\]]")
>
> I mean how do I get the ] into the characters to search for? It works
> if I remove a-z. Looks like a bug to me.
\] is the same as ] in string syntax. Anyway:
(info "(emacs) Regexps")
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 `-'.
To include `^' in a set, put it anywhere but at the beginning of
the set. (At the beginning, it complements the set--see below.)
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: How do I get a ] into a reg exp?
2006-09-13 20:16 ` David Hansen
@ 2006-09-13 20:26 ` David Kastrup
0 siblings, 0 replies; 10+ messages in thread
From: David Kastrup @ 2006-09-13 20:26 UTC (permalink / raw)
David Hansen <david.hansen@gmx.net> writes:
> On Wed, 13 Sep 2006 21:45:58 +0200 Lennart Borgman wrote:
>
>> How do I write
>>
>> (re-search-forward "[a-z\]]")
>
> "[][]" looks odd but works for me. But IMHO that should be "[\\[\\]]".
No. \ is not special in character alternatives.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: How do I get a ] into a reg exp?
2006-09-13 20:21 ` David Kastrup
@ 2006-09-13 21:31 ` Lennart Borgman
2006-09-13 21:35 ` Drew Adams
2006-09-13 21:42 ` Lennart Borgman
0 siblings, 2 replies; 10+ messages in thread
From: Lennart Borgman @ 2006-09-13 21:31 UTC (permalink / raw)
Cc: Emacs Devel
David Kastrup wrote:
> Lennart Borgman <lennart.borgman.073@student.lu.se> writes:
>
>
>> How do I write
>>
>> (re-search-forward "[a-z\]]")
>>
>> I mean how do I get the ] into the characters to search for? It works
>> if I remove a-z. Looks like a bug to me.
>>
>
> \] is the same as ] in string syntax. Anyway:
>
> (info "(emacs) Regexps")
>
> 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 `-'.
>
> To include `^' in a set, put it anywhere but at the beginning of
> the set. (At the beginning, it complements the set--see below.)
>
>
Thanks. That was a surprise.
^ permalink raw reply [flat|nested] 10+ messages in thread
* RE: How do I get a ] into a reg exp?
2006-09-13 21:31 ` Lennart Borgman
@ 2006-09-13 21:35 ` Drew Adams
2006-09-13 21:42 ` Lennart Borgman
1 sibling, 0 replies; 10+ messages in thread
From: Drew Adams @ 2006-09-13 21:35 UTC (permalink / raw)
> 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 `-'.
>
> To include `^' in a set, put it anywhere but at the beginning of
> the set. (At the beginning, it complements the set--see below.)
Thanks. That was a surprise.
It's pretty standard, actually:
http://www.greenend.org.uk/rjk/2002/06/regexp.html.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: How do I get a ] into a reg exp?
2006-09-13 21:31 ` Lennart Borgman
2006-09-13 21:35 ` Drew Adams
@ 2006-09-13 21:42 ` Lennart Borgman
2006-09-13 21:48 ` Lennart Borgman
1 sibling, 1 reply; 10+ messages in thread
From: Lennart Borgman @ 2006-09-13 21:42 UTC (permalink / raw)
Cc: Emacs Devel
Lennart Borgman wrote:
> David Kastrup wrote:
>> Lennart Borgman <lennart.borgman.073@student.lu.se> writes:
>>
>>
>>> How do I write
>>>
>>> (re-search-forward "[a-z\]]")
>>>
>>> I mean how do I get the ] into the characters to search for? It works
>>> if I remove a-z. Looks like a bug to me.
>>>
>>
>> \] is the same as ] in string syntax. Anyway:
>>
>> (info "(emacs) Regexps")
>>
>> 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 `-'.
>>
>> To include `^' in a set, put it anywhere but at the beginning of
>> the set. (At the beginning, it complements the set--see below.)
>>
>>
> Thanks. That was a surprise.
New surprise. I still can not get it to work. This is my actual search:
(re-search-forward "'\\([][-+a-zA-Z~<>!;,:.'\"%/?(){}$^0|]\\)'" nil t)
The above version does not match [ -- in the parenthesis.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: How do I get a ] into a reg exp?
2006-09-13 21:42 ` Lennart Borgman
@ 2006-09-13 21:48 ` Lennart Borgman
2006-09-13 22:07 ` David Kastrup
0 siblings, 1 reply; 10+ messages in thread
From: Lennart Borgman @ 2006-09-13 21:48 UTC (permalink / raw)
Lennart Borgman wrote:
> Lennart Borgman wrote:
>> David Kastrup wrote:
>>> Lennart Borgman <lennart.borgman.073@student.lu.se> writes:
>>>
>>>
>>>> How do I write
>>>>
>>>> (re-search-forward "[a-z\]]")
>>>>
>>>> I mean how do I get the ] into the characters to search for? It works
>>>> if I remove a-z. Looks like a bug to me.
>>>>
>>>
>>> \] is the same as ] in string syntax. Anyway:
>>>
>>> (info "(emacs) Regexps")
>>>
>>> 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 `-'.
>>>
>>> To include `^' in a set, put it anywhere but at the beginning of
>>> the set. (At the beginning, it complements the set--see below.)
>>>
>>>
>> Thanks. That was a surprise.
>
> New surprise. I still can not get it to work. This is my actual search:
>
> (re-search-forward "'\\([][-+a-zA-Z~<>!;,:.'\"%/?(){}$^0|]\\)'" nil t)
>
>
> The above version does not match [ -- in the parenthesis.
But this one works:
(re-search-forward "'\\([][+a-zA-Z~<>!;,:.'\"%/?(){}$^0|-]\\)'" nil t)
The - must be last. Thanks again.
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: How do I get a ] into a reg exp?
2006-09-13 21:48 ` Lennart Borgman
@ 2006-09-13 22:07 ` David Kastrup
2006-09-13 22:10 ` Drew Adams
0 siblings, 1 reply; 10+ messages in thread
From: David Kastrup @ 2006-09-13 22:07 UTC (permalink / raw)
Cc: Emacs Devel
Lennart Borgman <lennart.borgman.073@student.lu.se> writes:
> Lennart Borgman wrote:
>>>>
>>>> (info "(emacs) Regexps")
>>>>
>>>> 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 `-'.
>>>>
>>>> To include `^' in a set, put it anywhere but at the beginning of
>>>> the set. (At the beginning, it complements the set--see below.)
>>>>
>>>>
>>> Thanks. That was a surprise.
>>
>> New surprise. I still can not get it to work. This is my actual search:
>>
>> (re-search-forward "'\\([][-+a-zA-Z~<>!;,:.'\"%/?(){}$^0|]\\)'" nil t)
>>
>>
>> The above version does not match [ -- in the parenthesis.
> But this one works:
>
> (re-search-forward "'\\([][+a-zA-Z~<>!;,:.'\"%/?(){}$^0|-]\\)'" nil t)
>
> The - must be last. Thanks again.
Yes, [-+ is an empty range, since the first character is larger than
the last.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
^ permalink raw reply [flat|nested] 10+ messages in thread
* RE: How do I get a ] into a reg exp?
2006-09-13 22:07 ` David Kastrup
@ 2006-09-13 22:10 ` Drew Adams
0 siblings, 0 replies; 10+ messages in thread
From: Drew Adams @ 2006-09-13 22:10 UTC (permalink / raw)
Yes, [-+ is an empty range, since the first character is larger than
the last.
Presumably, another example of "less is more" ;-).
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2006-09-13 22:10 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
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2006-09-13 19:45 How do I get a ] into a reg exp? Lennart Borgman
2006-09-13 20:16 ` David Hansen
2006-09-13 20:26 ` David Kastrup
2006-09-13 20:21 ` David Kastrup
2006-09-13 21:31 ` Lennart Borgman
2006-09-13 21:35 ` Drew Adams
2006-09-13 21:42 ` Lennart Borgman
2006-09-13 21:48 ` Lennart Borgman
2006-09-13 22:07 ` David Kastrup
2006-09-13 22:10 ` Drew Adams
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