libstdc++-v3/testsuite/20_util/underlying_type/requirements/alias_decl.cc

   1 // { dg-do compile { target c++14 } }
   2 //
   3 // Copyright (C) 2013-2020 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 //
  21 // NB: This file is for testing type_traits with NO OTHER INCLUDES.
  22
  23 #include <type_traits>
  24
  25 using namespace std;
  26
  27 enum E : long { };
  28
  29 static_assert( is_same<typename underlying_type<E>::type,
  30                        underlying_type_t<E>>(),
  31                "underlying_type_t" );