| 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 | // struct destroying_delete_t { |
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| 10 | // explicit destroying_delete_t() = default; |
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| 11 | // }; |
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| 12 | // inline constexpr destroying_delete_t destroying_delete{}; |
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| 13 | |
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| 14 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 15 | |
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| 16 | #include <new> |
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| 17 | |
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| 18 | #include <cassert> |
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| 19 | #include "test_macros.h" |
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| 20 | |
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| 21 | struct A { |
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| 22 | void *data; |
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| 23 | A(); |
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| 24 | ~A(); |
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| 25 | |
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| 26 | static A* New(); |
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| 27 | void operator delete(A*, std::destroying_delete_t); |
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| 28 | }; |
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| 29 | |
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| 30 | bool A_constructed = false; |
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| 31 | bool A_destroyed = false; |
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| 32 | bool A_destroying_deleted = false; |
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| 33 | |
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| 34 | A::A() { |
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| 35 | A_constructed = true; |
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| 36 | } |
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| 37 | |
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| 38 | A::~A() { |
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| 39 | A_destroyed = true; |
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| 40 | } |
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| 41 | |
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| 42 | A* A::New() { |
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| 43 | return new(::operator new(sizeof(A))) A(); |
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| 44 | } |
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| 45 | |
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| 46 | void A::operator delete(A* a, std::destroying_delete_t) { |
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| 47 | A_destroying_deleted = true; |
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| 48 | ::operator delete(a); |
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| 49 | } |
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| 50 | |
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| 51 | // Only test the definition of the library feature-test macro when the compiler |
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| 52 | // supports the feature -- otherwise we don't define the library feature-test |
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| 53 | // macro. |
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| 54 | #if defined(__cpp_impl_destroying_delete) |
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| 55 | # if !defined(__cpp_lib_destroying_delete) |
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| 56 | # error "Expected __cpp_lib_destroying_delete to be defined" |
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| 57 | # elif __cpp_lib_destroying_delete < 201806L |
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| 58 | # error "Unexpected value of __cpp_lib_destroying_delete" |
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| 59 | # endif |
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| 60 | #else |
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| 61 | # if defined(__cpp_lib_destroying_delete) |
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| 62 | # error "The library feature-test macro for destroying delete shouldn't be defined when the compiler doesn't support the language feature" |
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| 63 | # endif |
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| 64 | #endif |
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| 65 | |
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| 66 | int main(int, char**) { |
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| 67 | // Ensure that we call the destroying delete and not the destructor. |
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| 68 | A* ap = A::New(); |
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| 69 | assert(A_constructed); |
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| 70 | delete ap; |
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| 71 | assert(!A_destroyed); |
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| 72 | assert(A_destroying_deleted); |
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| 73 | return 0; |
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| 74 | } |
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| 75 | |
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