text: //===----------------------------------------------------------------------===//
  //
  //                     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>
  
  #include "test_macros.h"
  
  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()
  {
  #ifndef TEST_HAS_NO_EXCEPTIONS
      try
      {
          const my_facet& f = std::use_facet<my_facet>(std::locale());
          ((void)f); // Prevent unused warning
          assert(false);
      }
      catch (std::bad_cast&)
      {
      }
  #endif
      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);
  }
  