forked from OSchip/llvm-project
45 lines
1.0 KiB
C++
45 lines
1.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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 <system_error>
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#include <cassert>
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#include <type_traits>
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#include "test_macros.h"
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void
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test(int i)
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{
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typedef std::error_code T;
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typedef std::hash<T> H;
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static_assert((std::is_same<H::argument_type, T>::value), "" );
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static_assert((std::is_same<H::result_type, std::size_t>::value), "" );
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H h;
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T ec(i, std::system_category());
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const std::size_t result = h(ec);
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LIBCPP_ASSERT(result == i);
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((void)result); // Prevent unused warning
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}
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int main()
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{
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test(0);
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test(2);
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test(10);
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}
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