#include <locale>
#include <codecvt>
#include <sstream>
#include <cassert>
#include <new>
int new_called = 0;
void* operator new(std::size_t s) throw(std::bad_alloc)
{
++new_called;
return std::malloc(s);
}
void operator delete(void* p) throw()
{
--new_called;
std::free(p);
}
int main()
{
typedef std::wbuffer_convert<std::codecvt_utf8<wchar_t> > B;
{
B b;
assert(b.rdbuf() == nullptr);
assert(new_called != 0);
}
assert(new_called == 0);
{
std::stringstream s;
B b(s.rdbuf());
assert(b.rdbuf() == s.rdbuf());
assert(new_called != 0);
}
assert(new_called == 0);
{
std::stringstream s;
B b(s.rdbuf(), new std::codecvt_utf8<wchar_t>);
assert(b.rdbuf() == s.rdbuf());
assert(new_called != 0);
}
assert(new_called == 0);
{
std::stringstream s;
B b(s.rdbuf(), new std::codecvt_utf8<wchar_t>, std::mbstate_t());
assert(b.rdbuf() == s.rdbuf());
assert(new_called != 0);
}
assert(new_called == 0);
}