| 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 | // type_traits |
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| 10 | |
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| 11 | // is_swappable |
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| 12 | |
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| 13 | // IMPORTANT: The include order is part of the test. We want to pick up |
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| 14 | // the following definitions in this order: |
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| 15 | // 1) is_swappable, is_nothrow_swappable |
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| 16 | // 2) iter_swap, swap_ranges |
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| 17 | // 3) swap(T (&)[N], T (&)[N]) |
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| 18 | // This test checks that (1) and (2) see forward declarations |
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| 19 | // for (3). |
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| 20 | #include <type_traits> |
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| 21 | #include <algorithm> |
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| 22 | #include <utility> |
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| 23 | |
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| 24 | #include "test_macros.h" |
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| 25 | |
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| 26 | int main(int, char**) { |
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| 27 | // Use a builtin type so we don't get ADL lookup. |
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| 28 | typedef double T[17][29]; |
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| 29 | { |
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| 30 | LIBCPP_STATIC_ASSERT(std::__is_swappable_v<T>, "" ); |
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| 31 | #if TEST_STD_VER > 14 |
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| 32 | static_assert(std::is_swappable_v<T>, "" ); |
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| 33 | #endif |
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| 34 | } |
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| 35 | { |
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| 36 | T t1 = {}; |
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| 37 | T t2 = {}; |
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| 38 | std::iter_swap(t1, t2); |
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| 39 | std::swap_ranges(t1, t1 + 17, t2); |
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| 40 | } |
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| 41 | |
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| 42 | return 0; |
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| 43 | } |
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| 44 | |
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