| 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 | // Make sure that std::allocate_shared works with an allocator type that is |
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| 10 | // only explicitly convertible from another specialization of itself. |
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| 11 | |
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| 12 | #include <cassert> |
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| 13 | #include <cstddef> |
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| 14 | #include <memory> |
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| 15 | |
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| 16 | template <class T> |
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| 17 | struct ExplicitAllocator { |
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| 18 | ExplicitAllocator() = default; |
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| 19 | template <class U> |
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| 20 | explicit ExplicitAllocator(ExplicitAllocator<U>) { } |
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| 21 | |
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| 22 | using value_type = T; |
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| 23 | T* allocate(std::size_t n) { return std::allocator<T>().allocate(n); } |
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| 24 | void deallocate(T* ptr, std::size_t n) { return std::allocator<T>().deallocate(ptr, n); } |
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| 25 | }; |
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| 26 | |
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| 27 | int main(int, char**) { |
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| 28 | std::shared_ptr<int> ptr = std::allocate_shared<int>(a: ExplicitAllocator<int>(), args: 0); |
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| 29 | (void)ptr; |
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| 30 | |
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| 31 | return 0; |
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| 32 | } |
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| 33 | |
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