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From: Martin Gregorie <martin@address-in-sig.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: regex reserved chars
Date: Sat, 9 Feb 2013 00:50:09 +0000 (UTC)
Organization: UK Free Software Network
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On Thu, 07 Feb 2013 20:47:55 -0700, Jim Janney wrote:

> Martin Gregorie <martin@address-in-sig.invalid> writes:
> 
>> On Wed, 06 Feb 2013 20:18:19 -0500, Arne Vajhøj wrote:
>>
>>> On 2/6/2013 7:28 PM, Roedy Green wrote:
>>>> I have always treated $ ( ) * + -. ? [ \ ] ^ { | }
>>>> as reserved regex chars.
>>>> I can't find any docs that say the list is different inside[  ].
>>>> is it?
>>> 
>>> Typical it is.
>>> 
>>> Regex syntax vary a bit between implementations.
>>> 
>>> So one should study the documentation.
>>> 
>>> java.util.regex.Pattern has an excellent JavaDoc.
>>>
>> That's normally the first place I look, but it doesn't answer Roedy's
>> question - apart, that is, from referring to the dead tree O'Reilly
>> book.
>> Expanding the 'Character Classes' description in the Pattern
>> class-level documentation or linking to an online source would be more
>> useful than the implied suggestion of buying the book from Amazon and
>> then waiting for delivery.
> 
> I have a copy of that book, in an earlier edition, but I usually find it
> more convenient to consult regular-expressions.info, e.g.
> 
>     http://www.regular-expressions.info/charclass.html
> 
> which answers the question very nicely.  It also explains things like
> lookbehind that the JavaDoc only hints at.

Thanks for the URI. Added to my reference library.



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