STL and UTF-8 file input/output. How to do it?

Question

I use wchar_t for internal strings and UTF-8 for storage in files. I need to use STL to input/output text to screen and also do it by using full Lithua

Answer 1

Use std::codecvt_facet template to perform the conversion.

You may use standard std::codecvt_byname, or a non-standard codecvt_facet implementation.

#include 
using namespace std;
typedef codecvt_facet Cvt;
locale utf8locale(locale(), new codecvt_byname ("en_US.UTF-8"));
wcout.pubimbue(utf8locale);
wcout << L"Hello, wide to multybyte world!" << endl;

Beware that on some platforms codecvt_byname can only emit conversion only for locales that are installed in the system.