114 lines
2.5 KiB
C++
114 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <functional>
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// template <class T>
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// struct hash
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// : public unary_function<T, size_t>
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// {
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// size_t operator()(T val) const;
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// };
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#include <functional>
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#include <cassert>
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#include <type_traits>
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#include <cstddef>
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#include <limits>
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#include "test_macros.h"
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template <class T>
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void
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test()
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{
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typedef std::hash<T> H;
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static_assert((std::is_same<typename H::argument_type, T>::value), "" );
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static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" );
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ASSERT_NOEXCEPT(H()(T()));
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H h;
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for (int i = 0; i <= 5; ++i)
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{
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T t(static_cast<T>(i));
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const bool small = std::integral_constant<bool, sizeof(T) <= sizeof(std::size_t)>::value; // avoid compiler warnings
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if (small)
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{
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const std::size_t result = h(t);
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LIBCPP_ASSERT(result == static_cast<size_t>(t));
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((void)result); // Prevent unused warning
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}
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}
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}
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int main(int, char**)
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{
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test<bool>();
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test<char>();
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test<signed char>();
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test<unsigned char>();
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test<char16_t>();
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test<char32_t>();
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test<wchar_t>();
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test<short>();
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test<unsigned short>();
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test<int>();
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test<unsigned int>();
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test<long>();
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test<unsigned long>();
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test<long long>();
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test<unsigned long long>();
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// LWG #2119
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test<std::ptrdiff_t>();
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test<size_t>();
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test<int8_t>();
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test<int16_t>();
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test<int32_t>();
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test<int64_t>();
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test<int_fast8_t>();
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test<int_fast16_t>();
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test<int_fast32_t>();
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test<int_fast64_t>();
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test<int_least8_t>();
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test<int_least16_t>();
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test<int_least32_t>();
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test<int_least64_t>();
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test<intmax_t>();
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test<intptr_t>();
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test<uint8_t>();
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test<uint16_t>();
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test<uint32_t>();
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test<uint64_t>();
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test<uint_fast8_t>();
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test<uint_fast16_t>();
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test<uint_fast32_t>();
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test<uint_fast64_t>();
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test<uint_least8_t>();
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test<uint_least16_t>();
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test<uint_least32_t>();
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test<uint_least64_t>();
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test<uintmax_t>();
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test<uintptr_t>();
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#ifndef _LIBCPP_HAS_NO_INT128
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test<__int128_t>();
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test<__uint128_t>();
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#endif
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return 0;
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}
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