54 lines
1.1 KiB
C++
54 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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// reference_wrapper
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// template <class... ArgTypes>
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// requires Callable<T, ArgTypes&&...>
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// Callable<T, ArgTypes&&...>::result_type
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// operator()(ArgTypes&&... args) const;
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#include <functional>
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#include <cassert>
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// member data pointer: cv qualifiers should transfer from argument to return type
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struct A_int_1
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{
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A_int_1() : data_(5) {}
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int data_;
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};
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void
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test_int_1()
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{
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// member data pointer
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{
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int A_int_1::*fp = &A_int_1::data_;
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std::reference_wrapper<int A_int_1::*> r1(fp);
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A_int_1 a;
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assert(r1(a) == 5);
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r1(a) = 6;
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assert(r1(a) == 6);
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const A_int_1* ap = &a;
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assert(r1(ap) == 6);
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r1(ap) = 7;
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assert(r1(ap) == 7);
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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_int_1();
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return 0;
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}
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