regular expressions

[jimberger]

Hello,

Does anybody know how i do regular expressions in c++?

do i need to include a library?

could someone provide me with a short example?

i am familar with regular expressions, its more how i go about using them in c++ is what i'm after.

cheers

 

[globos]

If you can work under non Windows OS you can get for free the Qt library, it provides good support for pattern matching with regular expressions.
Under Windows you must pay a license fee.

Look at the class QRegExp, or the online documentation, especially the "Detailed description" part :

http://doc.trolltech.com/3.3/qregexp.html

--
Globos

 

[Salem]

You don't need all that excess baggage of an entire GUI library just to get regex

http://www.gnu.org/directory/text/regex.html

It's a 'C' API, but if you want to locate (or write) a C++ wrapper around it, that's up to you.


--

 

[ArkM]

Download Regex++:

http://ourworld.compuserve.com/homepages/John_Maddock/regexpp.htm

 

[Cagliostro]

Use ATL regular expressions:

//C++ Widnows
#include <atlrx.h>
int main(int argc, char* argv[])
{
   CAtlRegExp<> reUrl;
   // five match groups: scheme, authority, path, query, fragment
   REParseError status = reUrl.Parse("({[^:/?#]+}:)?(//{[^/?#]*})?{[^?#]*}(?{[^#]*})?(#{.*})?" );
   if (REPARSE_ERROR_OK != status)return 0;//unepected error
   CAtlREMatchContext<> mcUrl;
   if (!reUrl.Match("[URL unfurl="true"]http://search.microsoft.com/us/Search.asp?qu=atl&boolean=ALL#results",[/URL] &mcUrl))
   {
      // Unexpected error.
      return 0;
   }
   for (UINT nGroupIndex = 0; nGroupIndex < mcUrl.m_uNumGroups; ++nGroupIndex)
   {
      const CAtlREMatchContext<>::RECHAR* szStart = 0;
      const CAtlREMatchContext<>::RECHAR* szEnd = 0;
      mcUrl.GetMatch(nGroupIndex, &szStart, &szEnd);
      ptrdiff_t nLength = szEnd - szStart;
      printf("%d: \"%.*s\"\n", nGroupIndex, nLength, szStart);
   }
}

Ion Filipski