Re: [Boost-users] Boost.Regex error: match_results error

From: John Maddock (john_at_[hidden])
Date: 2005-07-25 04:35:06

> so I wondered what's mean of the BOOST_REGEX_MATCH_EXTRA?

Enabling capture information has an impact on performance, so you must 
define BOOST_REGEX_MATCH_EXTRA *both* in your code, and when you are 
building the regex library. If you just want to build the example program 
then the easiest way is to use bjam to do so: cd into libs/regex/example 
and:

bjam captures_example

Alternatively add #define BOOST_REGEX_MATCH_EXTRA to boost/regex/user.hpp 
and rebuild the library.

This is all documented here: 
http://www.boost.org/libs/regex/doc/match_results.html#m17
and towards the end of here: 
http://www.boost.org/libs/regex/doc/captures.html

John.