libstdc++-v3/testsuite/26_numerics/endian/1.cc

   1 // Copyright (C) 2017-2021 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-options "-std=gnu++2a" }
  19 // { dg-do compile { target c++2a } }
  20
  21 #include <bit>
  22
  23 static_assert( std::is_enum_v<std::endian> );
  24 static_assert( std::endian::little != std::endian::big );
  25 static_assert( std::endian::native == std::endian::big
  26                 || std::endian::native == std::endian::little );
  27
  28 namespace gnu {
  29   int little, big, native;
  30 }
  31
  32 using namespace std;
  33 using namespace gnu;
  34
  35 // std::endian is a scoped-enum so these should refer to gnu::native etc.
  36 int test = little + big + native;