libstdc++-v3/testsuite/20_util/remove_cvref/value.cc

   1 // { dg-options "-std=gnu++2a" }
   2 // { dg-do compile { target c++2a } }
   3
   4 // Copyright (C) 2018-2019 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <type_traits>
  22 #include <testsuite_tr1.h>
  23
  24 void test01()
  25 {
  26   using std::remove_cvref;
  27   using std::is_same;
  28   using namespace __gnu_test;
  29
  30   static_assert(is_same<remove_cvref<const volatile int>::type,
  31                         int>::value, "");
  32   static_assert(is_same<remove_cvref<const volatile int*>::type,
  33                         const volatile int*>::value, "");
  34   static_assert(is_same<typename remove_cvref<const volatile int&>::type,
  35                         int>::value, "");
  36   static_assert(is_same<typename remove_cvref<const volatile int&&>::type,
  37                         int>::value, "");
  38   static_assert(is_same<remove_cvref<const volatile ClassType>::type,
  39                         ClassType>::value, "");
  40   static_assert(is_same<remove_cvref<const volatile ClassType*>::type,
  41                         const volatile ClassType*>::value, "");
  42   static_assert(is_same<typename remove_cvref<const volatile ClassType&>::type,
  43                         ClassType>::value, "");
  44   static_assert(is_same<typename remove_cvref<const volatile ClassType&&>::type,
  45                         ClassType>::value, "");
  46   static_assert(is_same<typename remove_cvref<const int(&)[3]>::type,
  47                         int[3]>::value, "");
  48   static_assert(is_same<typename remove_cvref<const int(&)()>::type,
  49                         const int()>::value, "");
  50 }