Markus Grabner wrote:

Hi!

For an application I'm writing, I need the match_results::captures feature, which requires to recompile boost with BOOST_REGEX_MATCH_EXTRA. I did so and globally installed the modified boost-1.33.1 on my machine. However, several utilities installed on my machine that came with my Linux distribution (openSUSE-10.2) don't work with the modified library (including the yast2 package manager, which made it somewhat challenging to re-install the original version). So I have two questions:

*) What is the recommended installation if applications requiring BOOST_REGEX_MATCH_EXTRA must be installed on the same machine together with applications that don't require this extension?

Use your own private version that's not named libboost_regex :-)

*) Are there any chances that future versions of the boost_regex library will remove this compile-time distinction? Are the few extra bytes for the (unused) m_captures member in sub_match really such a big problem?

I need to do a lot of testing before making building with that option the default. Certainly defining that macro has a big impact on the state machine size, which effects caching etc. John.