test/std/localization/locale.categories/category.ctype/locale.codecvt/types_char.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // <locale>
  11
  12 // template <>
  13 // class codecvt<char, char, mbstate_t>
  14 //     : public locale::facet,
  15 //       public codecvt_base
  16 // {
  17 // public:
  18 //     typedef char      intern_type;
  19 //     typedef char      extern_type;
  20 //     typedef mbstate_t state_type;
  21 //     ...
  22 // };
  23
  24 #include <locale>
  25 #include <type_traits>
  26 #include <cassert>
  27
  28 int main()
  29 {
  30     typedef std::codecvt<char, char, std::mbstate_t> F;
  31     static_assert((std::is_base_of<std::locale::facet, F>::value), "");
  32     static_assert((std::is_base_of<std::codecvt_base, F>::value), "");
  33     static_assert((std::is_same<F::intern_type, char>::value), "");
  34     static_assert((std::is_same<F::extern_type, char>::value), "");
  35     static_assert((std::is_same<F::state_type, std::mbstate_t>::value), "");
  36     std::locale l = std::locale::classic();
  37     assert(std::has_facet<F>(l));
  38     const F& f = std::use_facet<F>(l);
  39     ((void)f); // Prevent unused warning
  40     (void)F::id;
  41 }