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// Copyright (C) 2017 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++14 } }
// PR 78991
// This failed to compile with Clang because the result_of expression causes
// instantiation of _Iter_comp_iter::operator() outside the immediate context.
#include <algorithm>
struct function
{
function() = default;
template<typename F, typename = std::result_of_t<F&(int, int)>>
function(F) { }
bool operator()(int x, int y) const { return x < y; }
};
int main()
{
int a[2]{ 2, 1 };
std::sort(a, a+2, function{});
}
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