*fancy* handling for chars over 0x7F. The entire javascript engine in a static lib is less than 2M, so ICU seems a bit heavy weight for simple functionality. The only extra thing I want to add over usual boost::regex is to be able to use \xHHHH or \uHHHH and that it would operate on 16-bit characters.
Ok, I made it work the way I describe here - it understands now \u{HHH} notaion and operates on 16-bit wide chars. I didn't touch anything from c_regex_tratis. I only wrote myown char_traits and then typedef reg_expression<uchar16, regex_traits<uchar16>, BOOST_DEFAULT_ALLOCATOR(uchar16)> uregex16; and struct string16 : public std::basic_string<uchar16, my_char_traits>{ ... }; I suppose I need to overload c_regex_tratis if I need correct reinterpretation for \w, icase etc for chars that are outside latin-1?