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// Copyright (C) 2018-2022 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/>.
// { dg-do compile { target c++11 } }
#include <list>
void
test01()
{
// A list of int.
const std::list<int> nums = { 1, 2, 3, 4 };
// Grab the iterator type.
using list_itr_type = decltype( std::begin( nums ) );
// Confirm cend returns the same type.
static_assert( std::is_same< decltype( std::end( nums ) ), list_itr_type >::value, "" );
// The list's iterator type provides a well-formed non-member operator-() with valid return type (long int)
using substraction_type
= decltype( std::declval<list_itr_type>() - std::declval<list_itr_type>() ); // { dg-error "no match for 'operator-'" }
}