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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

bjam captures_example

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

This is all documented here:
and towards the end of here:


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