Re: [Boost-users] problem with boost regex search

Subject: Re: [Boost-users] problem with boost regex search
From: Guy LaCrosse (mlacrosse3_at_[hidden])
Date: 2009-02-24 09:09:47

Thanks John.

On Tue, Feb 24, 2009 at 3:09 AM, John Maddock <john_at_[hidden]>wrote:

> When I enter the following reg-ex: "^.*ab+c+d+" for the following text:
>> "aaaabbbcccdddee" the text found is:"aaaabbbcccd". The text found should
>> be:
>> "aaaabbbcccddd". Digging deeper, its seems that the reg-ex function
>> ignores
>> the last character if it is a "+".
>>
>> This is just using boost::regex_search with the flags = boost::match_any
>> and
>> boost::match_not_null
>>
>> Am I missing something here?
>>
>
> Yep, match_any says to the regex engine "I don't care what the match is,
> only if there is one", so it makes certain optimizations that result in the
> shorter string being found.  Stop using the match_any flag and you'll get
> regular Perl-like behavior.
>
> HTH, John.
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