libstdc++-v3/testsuite/23_containers/array/capacity/empty.cc

// { dg-do run { target c++11 } }
//
// Copyright (C) 2011-2026 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.

#include <array>
#include <testsuite_hooks.h>

void
test01() 
{
  {
    const size_t len = 5;
    typedef std::array<int, len> array_type;
    array_type a = { { 0, 1, 2, 3, 4 } };

    VERIFY( a.empty() == false );
  }

  {
    const size_t len = 0;
    typedef std::array<int, len> array_type;
    array_type a;

    VERIFY( a.empty() == true );
  }
}

#pragma GCC push_options
#pragma GCC optimize "0"

void
test02()
{
  {
    const size_t len = 3;
    typedef std::array<int, len> array_type;
    array_type a;

    VERIFY( a.empty() == false );    // { dg-bogus "-Wmaybe-uninitialized" }
  }
}

#pragma GCC pop_options

int main()
{
  test01();
  test02();
  return 0;
}