libstdc++-v3/testsuite/23_containers/array/tuple_interface/tuple_element.cc

   1 // { dg-do compile }
   2 // { dg-options "-std=gnu++11" }
   3 //
   4 // Copyright (C) 2011-2016 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 <array>
  22 #include <type_traits>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   bool test __attribute__((unused)) = true;
  29   using namespace std;
  30
  31   const size_t len = 3;
  32   typedef array<int, len> array_type;
  33
  34   static_assert(is_same<tuple_element<0, array_type>::type, int>::value, "" );
  35   static_assert(is_same<tuple_element<1, array_type>::type, int>::value, "" );
  36   static_assert(is_same<tuple_element<2, array_type>::type, int>::value, "");
  37
  38   static_assert(is_same<tuple_element<0, const array_type>::type,
  39                 const int>::value, "");
  40   static_assert(is_same<tuple_element<1, const array_type>::type,
  41                 const int>::value, "");
  42   static_assert(is_same<tuple_element<2, const array_type>::type,
  43                 const int>::value, "");
  44
  45   static_assert(is_same<tuple_element<0, volatile array_type>::type,
  46                 volatile int>::value, "");
  47   static_assert(is_same<tuple_element<1, volatile array_type>::type,
  48                 volatile int>::value, "");
  49   static_assert( (is_same<tuple_element<2, volatile array_type>::type,
  50            volatile int>::value == true), "" );
  51
  52   static_assert(is_same<tuple_element<0, const volatile array_type>::type,
  53                 const volatile int>::value, "");
  54   static_assert(is_same<tuple_element<1, const volatile array_type>::type,
  55                 const volatile int>::value, "");
  56   static_assert(is_same<tuple_element<2, const volatile array_type>::type,
  57                 const volatile int>::value, "");
  58 }
  59
  60 int main()
  61 {
  62   test01();
  63   return 0;
  64 }