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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 <system_error>
#include <cassert>
#include <type_traits>
#include "test_macros.h"
void
test(int i)
{
typedef std::error_condition T;
typedef std::hash<T> H;
static_assert((std::is_same<H::argument_type, T>::value), "" );
static_assert((std::is_same<H::result_type, std::size_t>::value), "" );
ASSERT_NOEXCEPT(H()(T()));
H h;
T ec(i, std::system_category());
const std::size_t result = h(ec);
LIBCPP_ASSERT(result == static_cast<std::size_t>(i));
((void)result); // Prevent unused warning
}
int main(int, char**)
{
test(0);
test(2);
test(10);
return 0;
}
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