Cant compile in mingw ( QtCreator , Windows ) code with using boost xpressive. It talks " undeclared symbols - wsregex " . But with sregex ang cregex it works fine. Visual Studio compile wsregex fine , too. But GCC not. Found nex code in \boost\xpressive\xpressive_fwd.hpp - #if defined(BOOST_NO_CWCHAR) | defined(BOOST_NO_CWCTYPE) | defined(BOOST_NO_STD_WSTRING) # ifndef BOOST_XPRESSIVE_NO_WREGEX # define BOOST_XPRESSIVE_NO_WREGEX # endif #endif and later : #ifndef BOOST_XPRESSIVE_NO_WREGEX typedef basic_regex<std::wstring::const_iterator> wsregex; typedef basic_regex<wchar_t const *> wcregex; #endif What can i do? Thanx. -- View this message in context: http://old.nabble.com/help-me-with-xpressive-tp26842492p26842492.html Sent from the Boost - Users mailing list archive at Nabble.com.