forked from OSchip/llvm-project
52 lines
1015 B
C++
52 lines
1015 B
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<Returnable R, class T> unspecified mem_fn(R T::* pm);
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#include <functional>
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#include <cassert>
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#include "test_macros.h"
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struct A
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{
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double data_;
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};
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template <class F>
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TEST_CONSTEXPR_CXX20 bool
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test(F f)
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{
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{
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A a = {0.0};
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f(a) = 5;
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assert(a.data_ == 5);
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A* ap = &a;
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f(ap) = 6;
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assert(a.data_ == 6);
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const A* cap = ap;
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assert(f(cap) == f(ap));
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const F& cf = f;
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assert(cf(ap) == f(ap));
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}
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return true;
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}
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int main(int, char**)
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{
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test(std::mem_fn(&A::data_));
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#if TEST_STD_VER >= 20
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static_assert(test(std::mem_fn(&A::data_)));
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#endif
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return 0;
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}
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