Re: [Boost-users] [regex] wildcard matching byte not character

Subject: Re: [Boost-users] [regex] wildcard matching byte not character
From: Richard Clokie (richard.clokie_at_[hidden])
Date: 2010-03-01 14:50:05

Yup, spotted it about 20 minutes after posting. Sorry about that, and 
thanks for the help.

Richard

John Maddock wrote:
>> I'm having trouble with the behaviour of the wildcard character when
>> using boost regex and unicode strings. I would expect a . to match a
>> character, not a byte, but that's not the behaviour I'm seeing. I would
>> have thought one wildcard would match any previous character, but for
>> multi-byte characters in UTF-8 I have to use multiple wildcards to match
>> them.
>>
>> I would appreciate it if someone could explain whether this is expected
>> behaviour or not, or if there are flags that control this.
>>
>> What I'm trying to accomplish is to match a pattern (in UTF-8 ) against
>> a string (in UTF-8). I'm creating icu UnicodeStrings since I'm having
>> other problems with straight UTF-8 char*s and my platform doesn't
>> support w_chars. I can show examples of the non-UnicodeString problems
>> if desired.
> 
> You're constructing invalid UnicodeString's: the const char* constructor 
> does not convert from UTF-8, if the strings are constructed as:
> 
> UnicodeString s(buf, "UTF8");
> 
> Then the output changes to
> 
> Success!
> Failed
> 
> Which is what you expected.
> 
> HTH, John.
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