libstdc++-v3/testsuite/23_containers/array/element_access/front.cc

   1 // { dg-do run { target c++11 } }
   2 //
   3 // Copyright (C) 2011-2022 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 <array>
  21 #include <testsuite_hooks.h>
  22
  23 void
  24 test01()
  25 {
  26   const size_t len = 5;
  27   typedef std::array<int, len> array_type;
  28
  29   {
  30     array_type a = { { 0, 1, 2, 3, 4 } };
  31     int& ri = a.front();
  32     VERIFY( ri == 0 );
  33   }
  34
  35   {
  36     const array_type ca = { { 4, 3, 2, 1, 0 } };
  37     const int& cri = ca.front();
  38     VERIFY( cri == 4 );
  39   }
  40 }
  41
  42 int main()
  43 {
  44   test01();
  45   return 0;
  46 }