| 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::allocator<void> is trivial. This was the case before C++20 |
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| 10 | // with the std::allocator<void> explicit specialization, and this test makes sure |
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| 11 | // that we maintain that property across all standards. |
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| 12 | // |
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| 13 | // This is important since triviality has implications on how the type is passed |
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| 14 | // as a function argument in the ABI. |
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| 15 | |
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| 16 | #include <memory> |
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| 17 | #include <type_traits> |
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| 18 | |
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| 19 | typedef std::allocator<void> A1; |
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| 20 | typedef std::allocator<void const> A2; |
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| 21 | struct A3 : std::allocator<void> { }; |
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| 22 | struct A4 : std::allocator<void const> { }; |
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| 23 | |
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| 24 | static_assert(std::is_trivially_default_constructible<A1>::value, "" ); |
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| 25 | static_assert(std::is_trivial<A1>::value, "" ); |
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| 26 | |
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| 27 | static_assert(std::is_trivially_default_constructible<A2>::value, "" ); |
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| 28 | static_assert(std::is_trivial<A2>::value, "" ); |
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| 29 | |
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| 30 | static_assert(std::is_trivially_default_constructible<A3>::value, "" ); |
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| 31 | static_assert(std::is_trivial<A3>::value, "" ); |
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| 32 | |
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| 33 | static_assert(std::is_trivially_default_constructible<A4>::value, "" ); |
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| 34 | static_assert(std::is_trivial<A4>::value, "" ); |
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| 35 | |
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