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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <locale>
// template <class Facet> const Facet& use_facet(const locale& loc);
#include <locale>
#include <cassert>
int facet_count = 0;
struct my_facet
: public std::locale::facet
{
static std::locale::id id;
bool im_alive;
my_facet() : im_alive(true) {++facet_count;}
~my_facet() {im_alive = false; --facet_count;}
};
std::locale::id my_facet::id;
int main()
{
try
{
const my_facet& f = std::use_facet<my_facet>(std::locale());
assert(false);
}
catch (std::bad_cast&)
{
}
const my_facet* fp = 0;
{
std::locale loc(std::locale(), new my_facet);
const my_facet& f = std::use_facet<my_facet>(loc);
assert(f.im_alive);
fp = &f;
assert(fp->im_alive);
assert(facet_count == 1);
}
assert(facet_count == 0);
}
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