77b9abfc8e
This commit adds missing support for constexpr in std::array under all standard modes up to and including C++20. It also transforms the <array> tests to check for constexpr-friendliness under the right standard modes. Fixes https://llvm.org/PR40124 Fixes rdar://57522096 Supersedes https://reviews.llvm.org/D60666 Differential Revision: https://reviews.llvm.org/D80452
51 lines
1.4 KiB
C++
51 lines
1.4 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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// Make sure std::array is an aggregate type.
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#include <array>
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#include <type_traits>
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template <typename T>
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void tests()
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{
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// Test aggregate initialization
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{
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std::array<T, 0> a0 = {}; (void)a0;
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std::array<T, 1> a1 = {T()}; (void)a1;
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std::array<T, 2> a2 = {T(), T()}; (void)a2;
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std::array<T, 3> a3 = {T(), T(), T()}; (void)a3;
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}
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// Test the is_aggregate trait.
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#if TEST_STD_VER >= 17 // The trait is only available in C++17 and above
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static_assert(std::is_aggregate<std::array<T, 0> >::value, "");
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static_assert(std::is_aggregate<std::array<T, 1> >::value, "");
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static_assert(std::is_aggregate<std::array<T, 2> >::value, "");
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static_assert(std::is_aggregate<std::array<T, 3> >::value, "");
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static_assert(std::is_aggregate<std::array<T, 4> >::value, "");
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#endif
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}
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struct Empty { };
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struct NonEmpty { int i; int j; };
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int main(int, char**)
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{
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tests<char>();
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tests<int>();
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tests<long>();
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tests<float>();
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tests<double>();
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tests<long double>();
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tests<NonEmpty>();
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tests<Empty>();
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return 0;
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}
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