RxString regular expression string library

RxString is a string class that is interchangeable with std::string, but adds additional regex functionality, as well as convertTo / convertFrom template wrappers around std::ostringstream, a trim() and other string functions that we've come to expect from more versatile string classes.

rxstring/trunk, or rxstring.h

Documentation

When I get around to generating it, it will appear here:

Doxygen documentation of RxString (Doxygen index)

for now, look at rxstring.h.

Use Case

The rconfig? project has a simple use-case (from rconfig.cpp)

    /* compile a regex that matches 'key = value', and another that matches non-comments */
    static RxString::Regex line_regex("^[[:space:]]*([A-Za-z_][A-Za-z0-9_]*)[[:space:]]*=[[:space:]]*(.*)");
    static RxString::Regex comment_regex("[^#]+");
    RxString::match_vec_type matches;
    RxString::match_vec_type rhs;
    if (line.match(line_regex, &matches)) {
        RxString val;
        matches[2].trim();
        if (!matches[2].empty() && matches[2][0] == '"') {
            /* if value starts with a ", treat as a quoted string */
            val = getquoted(matches[2]);
        } else if (matches[2].match(comment_regex, &rhs)) {
            /* otherwise match anything up to a # (comment) */
            val = rhs[0];
        } else {
            return false;  /* value is empty */
        }
        /* here matches[1] holds key and val holds value */
    }

Requirements

• cmake http://www.cmake.org/
• Preferably a regex library in libc or in lregex (autodetected), otherwise an internal regex implementation is used.

SVN Checkout & Building

svn co http://code.apted.net/svn/pub/rxstring/trunk rxstring
mkdir rxstring-build && cd rxstring-build
cmake ../rxstring && make
/* #include rxtstring.h and link something to librxstring.so */