How do I convert wchar_t* to std::string?

Question

I changed my class to use std::string (based on the answer I got here but a function I have returns wchar_t *. How do I convert it to std::string?

I tried this:

Answer 1

You can convert a wide char string to an ASCII string using the following function:

#include 
#include 
#include 

std::string ToNarrow( const wchar_t *s, char dfault = '?', 
                      const std::locale& loc = std::locale() )
{
  std::ostringstream stm;

  while( *s != L'\0' ) {
    stm << std::use_facet< std::ctype >( loc ).narrow( *s++, dfault );
  }
  return stm.str();
}

Be aware that this will just replace any wide character for which an equivalent ASCII character doesn't exist with the dfault parameter; it doesn't convert from UTF-16 to UTF-8. If you want to convert to UTF-8 use a library such as ICU.