libstdc++-v3/testsuite/tr1/6_containers/array/requirements/zero_sized_arrays.cc

   1 // 2004-10-20  Benjamin Kosnik  <bkoz@redhat.com>
   2 //
   3 // Copyright (C) 2004-2019 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 // 6.2.2.4 Zero sized arrays
  21
  22 #include <tr1/array>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   const size_t len = 0;
  29   typedef std::tr1::array<int, len> array_type;
  30
  31   // 1: ?
  32   array_type a = { };
  33
  34   // 2
  35   array_type b;
  36
  37   // 3
  38   // begin() == end()
  39   VERIFY( a.begin() == a.end() );
  40   VERIFY( b.begin() == b.end() );
  41
  42   // 4: ?
  43   // begin() == end() == unique value.
  44   {
  45     typedef std::tr1::array<long, len> array_type1;
  46     typedef std::tr1::array<char, len> array_type2;
  47     array_type1 one;
  48     array_type2 two;
  49     void* v1 = one.begin();
  50     void* v2 = two.begin();
  51     VERIFY( v1 != v2 );
  52   }
  53 }
  54
  55 int main()
  56 {
  57   test01();
  58   return 0;
  59 }
  60