libcxx/test/std/localization/locales/locale.global.templates/has_facet.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <locale>
  10
  11 // template <class Facet> bool has_facet(const locale& loc) throw();
  12
  13 #include <locale>
  14 #include <cassert>
  15
  16 #include "test_macros.h"
  17
  18 struct my_facet
  19     : public std::locale::facet
  20 {
  21     static std::locale::id id;
  22 };
  23
  24 std::locale::id my_facet::id;
  25
  26 int main(int, char**)
  27 {
  28     std::locale loc;
  29     assert(std::has_facet<std::ctype<char> >(loc));
  30     assert(!std::has_facet<my_facet>(loc));
  31     std::locale loc2(loc, new my_facet);
  32     assert(std::has_facet<my_facet>(loc2));
  33
  34   return 0;
  35 }