C++ convert char * to to wide string wstring

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Often times when working with older code you find yourself staring at some old char* variables. I often find myself having to convert them to wide strings for unicode support (wstring). I created a handy function that makes this simple. 
wstring charToWideString( const char* src )
{
    return std::wstring( src, src + strlen(src) );
}
Now simply call thus: 
wstring thus = charToWideString( "thus" );
Drop this function in a static class or header file and use it anywhere.

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