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

   1 // { dg-do compile { target c++14 } }
   2
   3 // Copyright (C) 2013-2023 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 #include <type_traits>
  21
  22 using namespace std;
  23
  24 template<typename Trait, typename Result>
  25   using test = is_same<typename Trait::type, Result>;
  26
  27 static_assert( test<make_unsigned<const int>, make_unsigned_t<const int>>(),
  28                "make_unsigned_t<const int>" );
  29
  30 static_assert( test<make_unsigned<unsigned>, make_unsigned_t<unsigned>>(),
  31                "make_unsigned_t<unsigned>" );
  32
  33 static_assert( test<make_unsigned<char>, make_unsigned_t<char>>(),
  34                "make_unsigned_t<char>" );