[Boost-users] [Regex] Subexpression matching during search

Subject: [Boost-users] [Regex] Subexpression matching during search
From: Larry (lknain_at_[hidden])
Date: 2014-01-02 16:40:55

I have probably missed something in the doc that answers my query but I just can’t see it.

This is using Perl syntax.

I had a regex:

    ^(XXX_\d{3,3})_\d{3,3}$

It compiles OK but does not match anything in a regex_search. If I remove the parenthesis

    ^XXX_\d{3,3}_\d{3,3}$

I get matches. Any clues as to what I am missing?

Extract of regex related code lines:

        reg.regex = new boost::regex(reg.reg,boost::regex::perl | boost::regex::icase);

        boost::match_results<string::const_iterator> match;
        boost::match_flag_type flags = boost::match_default;
        std::string::const_iterator xstart, xend;

        xrc = boost::regex_search(xstart,xend,match,*((*rgi).regex),flags);

Larry