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// codecvt::length example
#include <iostream> // std::wcout, std::endl
#include <locale> // std::locale, std::codecvt, std::use_facet
#include <cwchar> // std::mbstate_t
#include <cstddef> // std::size_t
int main ()
{
typedef std::codecvt<wchar_t,char,std::mbstate_t> facet_type;
std::locale loc;
const facet_type& myfacet = std::use_facet<facet_type>(loc);
const char source[] = "abcdefghijklmnopqrstuvwxyz";
// prepare objects for codecvt::length:
std::mbstate_t mystate;
const char * pc;
wchar_t * pwc;
// calculate length of dest (max 30):
std::size_t length = myfacet.length (mystate, source, source+sizeof(source), 30);
wchar_t* dest = new wchar_t[length];
myfacet.in (mystate, source, source+sizeof(source), pc, dest, dest+length, pwc);
std::wcout << dest << std::endl;
delete[] dest;
return 0;
}
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