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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 <functional>
#include <cassert>
#include <type_traits>
#include <cstddef>
#include <limits>
#include "test_macros.h"
template <class T>
void
test()
{
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;
for (int i = 0; i <= 5; ++i)
{
T t(static_cast<T>(i));
const bool small = std::integral_constant<bool, sizeof(T) <= sizeof(std::size_t)>::value; // avoid compiler warnings
if (small)
{
const std::size_t result = h(t);
LIBCPP_ASSERT(result == static_cast<size_t>(t));
((void)result); // Prevent unused warning
}
}
}
int main(int, char**)
{
test<bool>();
test<char>();
test<signed char>();
test<unsigned char>();
test<char16_t>();
test<char32_t>();
test<wchar_t>();
test<short>();
test<unsigned short>();
test<int>();
test<unsigned int>();
test<long>();
test<unsigned long>();
test<long long>();
test<unsigned long long>();
// LWG #2119
test<std::ptrdiff_t>();
test<size_t>();
test<int8_t>();
test<int16_t>();
test<int32_t>();
test<int64_t>();
test<int_fast8_t>();
test<int_fast16_t>();
test<int_fast32_t>();
test<int_fast64_t>();
test<int_least8_t>();
test<int_least16_t>();
test<int_least32_t>();
test<int_least64_t>();
test<intmax_t>();
test<intptr_t>();
test<uint8_t>();
test<uint16_t>();
test<uint32_t>();
test<uint64_t>();
test<uint_fast8_t>();
test<uint_fast16_t>();
test<uint_fast32_t>();
test<uint_fast64_t>();
test<uint_least8_t>();
test<uint_least16_t>();
test<uint_least32_t>();
test<uint_least64_t>();
test<uintmax_t>();
test<uintptr_t>();
#ifndef _LIBCPP_HAS_NO_INT128
test<__int128_t>();
test<__uint128_t>();
#endif
return 0;
}
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