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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
//
//===----------------------------------------------------------------------===//
// <functional>
// template <class T>
// struct hash
// : public unary_function<T, size_t>
// {
// size_t operator()(T val) const;
// };
#include <bitset>
#include <cassert>
#include <type_traits>
#include "test_macros.h"
template <std::size_t N>
void
test()
{
typedef std::bitset<N> T;
typedef std::hash<T> H;
static_assert((std::is_same<typename H::argument_type, T>::value), "" );
static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" );
ASSERT_NOEXCEPT(H()(T()));
H h;
T bs(static_cast<unsigned long long>(N));
const std::size_t result = h(bs);
LIBCPP_ASSERT(result == N);
((void)result); // Prevent unused warning
}
int main()
{
test<0>();
test<10>();
test<100>();
test<1000>();
}
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