Untitled

Removing C/C   style comments using boost::regex
s#/*[^*]**+([^/*][^*]**+)*/|//([^\]|[^n][n]?)*?n|("(\.|[^"\])*"|'(\.|[^'\])*'|.[^/"'\]*)#defined $3 ? $3 : ""#gse;

std::string input = "hello /* world */ world";

boost::regex reg("(/\*([^*]|(\*+[^*/]))*\*+/)|(//.*)");

input = boost::regex_replace(input, reg, "");

std::string strip_comments(std::string const& input) {
    std::string output;
    typedef boost::wave::cpplexer::lex_token<> token_type;
    typedef boost::wave::cpplexer::lex_iterator<token_type> lexer_type;
    typedef token_type::position_type position_type;

    position_type pos;

    lexer_type it = lexer_type(input.begin(), input.end(), pos,
        boost::wave::language_support(
            boost::wave::support_cpp|boost::wave::support_option_long_long));
    lexer_type end = lexer_type();

    for (;it != end; ++it) {
        if (*it != boost::wave::T_CCOMMENT
         && *it != boost::wave::T_CPPCOMMENT) {
            output += std::string(it->get_value().begin(), it->get_value().end());
        }
    }
    return output;
}

*

\*

[^\]

[^\\]