| 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_trivially_assignable |
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| 12 | |
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| 13 | #include <type_traits> |
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| 14 | #include "test_macros.h" |
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| 15 | |
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| 16 | template <class T, class U> |
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| 17 | void test_is_trivially_assignable() |
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| 18 | { |
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| 19 | static_assert(( std::is_trivially_assignable<T, U>::value), "" ); |
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| 20 | #if TEST_STD_VER > 14 |
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| 21 | static_assert(( std::is_trivially_assignable_v<T, U>), "" ); |
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| 22 | #endif |
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| 23 | } |
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| 24 | |
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| 25 | template <class T, class U> |
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| 26 | void test_is_not_trivially_assignable() |
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| 27 | { |
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| 28 | static_assert((!std::is_trivially_assignable<T, U>::value), "" ); |
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| 29 | #if TEST_STD_VER > 14 |
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| 30 | static_assert((!std::is_trivially_assignable_v<T, U>), "" ); |
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| 31 | #endif |
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| 32 | } |
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| 33 | |
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| 34 | struct A |
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| 35 | { |
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| 36 | }; |
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| 37 | |
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| 38 | struct B |
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| 39 | { |
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| 40 | void operator=(A); |
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| 41 | }; |
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| 42 | |
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| 43 | struct C |
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| 44 | { |
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| 45 | void operator=(C&); // not const |
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| 46 | }; |
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| 47 | |
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| 48 | int main(int, char**) |
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| 49 | { |
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| 50 | test_is_trivially_assignable<int&, int&> (); |
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| 51 | test_is_trivially_assignable<int&, int> (); |
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| 52 | test_is_trivially_assignable<int&, double> (); |
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| 53 | |
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| 54 | test_is_not_trivially_assignable<int, int&> (); |
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| 55 | test_is_not_trivially_assignable<int, int> (); |
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| 56 | test_is_not_trivially_assignable<B, A> (); |
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| 57 | test_is_not_trivially_assignable<A, B> (); |
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| 58 | test_is_not_trivially_assignable<C&, C&> (); |
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| 59 | |
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| 60 | return 0; |
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| 61 | } |
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| 62 | |
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