| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // <functional> |
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| 10 | |
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| 11 | // reference_wrapper |
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| 12 | |
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| 13 | // template <class... ArgTypes> |
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| 14 | // requires Callable<T, ArgTypes&&...> |
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| 15 | // Callable<T, ArgTypes&&...>::result_type |
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| 16 | // operator()(ArgTypes&&... args) const; |
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| 17 | |
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| 18 | #include <functional> |
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| 19 | #include <cassert> |
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| 20 | |
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| 21 | // member data pointer: cv qualifiers should transfer from argument to return type |
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| 22 | |
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| 23 | struct A_int_1 |
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| 24 | { |
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| 25 | A_int_1() : data_(5) {} |
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| 26 | |
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| 27 | int data_; |
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| 28 | }; |
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| 29 | |
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| 30 | void |
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| 31 | test_int_1() |
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| 32 | { |
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| 33 | // member data pointer |
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| 34 | { |
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| 35 | int A_int_1::*fp = &A_int_1::data_; |
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| 36 | std::reference_wrapper<int A_int_1::*> r1(fp); |
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| 37 | A_int_1 a; |
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| 38 | assert(r1(a) == 5); |
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| 39 | r1(a) = 6; |
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| 40 | assert(r1(a) == 6); |
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| 41 | const A_int_1* ap = &a; |
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| 42 | assert(r1(ap) == 6); |
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| 43 | r1(ap) = 7; |
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| 44 | assert(r1(ap) == 7); |
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| 45 | } |
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| 46 | } |
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| 47 | |
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| 48 | int main(int, char**) |
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| 49 | { |
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| 50 | test_int_1(); |
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| 51 | |
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| 52 | return 0; |
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| 53 | } |
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| 54 | |
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