libstdc++-v3/testsuite/23_containers/array/tuple_interface/tuple_size.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 <testsuite_hooks.h>
  23
  24 void
  25 test01()
  26 {
  27   bool test __attribute__((unused)) = true;
  28   using namespace std;
  29
  30   {
  31     const size_t len = 5;
  32     typedef array<int, len> array_type;
  33     static_assert(tuple_size<array_type>::value == 5, "");
  34     static_assert(tuple_size<const array_type>::value == 5, "");
  35     static_assert(tuple_size<volatile array_type>::value == 5, "");
  36     static_assert(tuple_size<const volatile array_type>::value == 5, "");
  37   }
  38
  39   {
  40     const size_t len = 0;
  41     typedef array<float, len> array_type;
  42     static_assert(tuple_size<array_type>::value == 0, "");
  43     static_assert(tuple_size<const array_type>::value == 0, "");
  44     static_assert(tuple_size<volatile array_type>::value == 0, "");
  45     static_assert(tuple_size<const volatile array_type>::value == 0, "");
  46   }
  47 }
  48
  49 int main()
  50 {
  51   test01();
  52   return 0;
  53 }