File: hash.pass.cpp

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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03, c++11

// <propagate_const>

// template <class T> struct hash<experimental::fundamentals_v2::propagate_const<T>>;

#include <experimental/propagate_const>
#include <cassert>
#include <cstddef>
#include <functional>

#include "test_macros.h"
#include "propagate_const_helpers.h"

using std::experimental::propagate_const;

template <>
struct std::hash<X> {
  typedef X first_argument_type;

  std::size_t operator()(const first_argument_type&) const { return 99; }
};

int main(int, char**) {

  typedef propagate_const<X> P;

  P p(1);

  auto h = std::hash<P>();

  assert(h(p)==99);

  return 0;
}