Convert const char* to const wchar_t*

Question

I am trying to create a program with Irrlicht that loads certain things from a configuration file written in Lua, one of which is the window title. However, the lua_tostri

Answer 1

There are multiple questions on SO that address the problem on Windows. Sample posts:

1. char* to const wchar_t * conversion
2. conversion from unsigned char* to const wchar_t*

There is a platform agnostic method posted at http://ubuntuforums.org/showthread.php?t=1579640. The source from this site is (I hope I am not violating any copyright):

#include 
#include 
#include 
#include 
using namespace std ;

wstring widen( const string& str )
{
    wostringstream wstm ;
    const ctype& ctfacet = use_facet>(wstm.getloc()) ;
    for( size_t i=0 ; i& ctfacet = use_facet>(stm.getloc());

    // Correct code.
    const ctype& ctfacet = use_facet>(stm.getloc());

    for( size_t i=0 ; i