43 lines
1.1 KiB
C++
43 lines
1.1 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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// minus
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#include <functional>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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int main(int, char**)
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{
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typedef std::minus<int> F;
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const F f = F();
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static_assert((std::is_same<int, F::first_argument_type>::value), "" );
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static_assert((std::is_same<int, F::second_argument_type>::value), "" );
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static_assert((std::is_same<int, F::result_type>::value), "" );
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assert(f(3, 2) == 1);
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#if TEST_STD_VER > 11
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typedef std::minus<> F2;
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const F2 f2 = F2();
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assert(f2(3,2) == 1);
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assert(f2(3.0, 2) == 1);
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assert(f2(3, 2.5) == 0.5);
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constexpr int foo = std::minus<int> () (3, 2);
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static_assert ( foo == 1, "" );
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constexpr double bar = std::minus<> () (3.0, 2);
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static_assert ( bar == 1.0, "" );
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#endif
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return 0;
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}
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