| 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 | // <memory> |
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| 10 | |
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| 11 | // template <class T, class Alloc> struct uses_allocator; |
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| 12 | |
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| 13 | #include <memory> |
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| 14 | #include <vector> |
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| 15 | #include <type_traits> |
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| 16 | |
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| 17 | #include "test_macros.h" |
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| 18 | |
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| 19 | struct A |
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| 20 | { |
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| 21 | }; |
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| 22 | |
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| 23 | struct B |
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| 24 | { |
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| 25 | typedef int allocator_type; |
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| 26 | }; |
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| 27 | |
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| 28 | struct C { |
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| 29 | static int allocator_type; |
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| 30 | }; |
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| 31 | |
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| 32 | struct D { |
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| 33 | static int allocator_type() { return 0; } |
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| 34 | }; |
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| 35 | |
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| 36 | struct E { |
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| 37 | private: |
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| 38 | typedef int allocator_type; |
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| 39 | }; |
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| 40 | |
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| 41 | template <bool Expected, class T, class A> |
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| 42 | void |
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| 43 | test() |
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| 44 | { |
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| 45 | static_assert((std::uses_allocator<T, A>::value == Expected), "" ); |
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| 46 | static_assert(std::is_base_of<std::integral_constant<bool, Expected>, std::uses_allocator<T, A> >::value, "" ); |
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| 47 | #if TEST_STD_VER > 14 |
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| 48 | ASSERT_SAME_TYPE(decltype(std::uses_allocator_v<T, A>), const bool); |
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| 49 | static_assert((std::uses_allocator_v<T, A> == Expected), "" ); |
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| 50 | #endif |
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| 51 | } |
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| 52 | |
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| 53 | int main(int, char**) |
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| 54 | { |
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| 55 | test<false, int, std::allocator<int> >(); |
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| 56 | test<true, std::vector<int>, std::allocator<int> >(); |
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| 57 | test<false, A, std::allocator<int> >(); |
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| 58 | test<false, B, std::allocator<int> >(); |
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| 59 | test<true, B, double>(); |
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| 60 | test<false, C, decltype(C::allocator_type)>(); |
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| 61 | test<false, D, decltype(D::allocator_type)>(); |
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| 62 | #if TEST_STD_VER >= 11 |
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| 63 | test<false, E, int>(); |
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| 64 | #endif |
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| 65 | |
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| 66 | |
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| 67 | // static_assert((!std::uses_allocator<int, std::allocator<int> >::value), ""); |
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| 68 | // static_assert(( std::uses_allocator<std::vector<int>, std::allocator<int> >::value), ""); |
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| 69 | // static_assert((!std::uses_allocator<A, std::allocator<int> >::value), ""); |
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| 70 | // static_assert((!std::uses_allocator<B, std::allocator<int> >::value), ""); |
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| 71 | // static_assert(( std::uses_allocator<B, double>::value), ""); |
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| 72 | // static_assert((!std::uses_allocator<C, decltype(C::allocator_type)>::value), ""); |
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| 73 | // static_assert((!std::uses_allocator<D, decltype(D::allocator_type)>::value), ""); |
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| 74 | // #if TEST_STD_VER >= 11 |
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| 75 | // static_assert((!std::uses_allocator<E, int>::value), ""); |
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| 76 | // #endif |
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| 77 | |
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| 78 | return 0; |
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| 79 | } |
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| 80 | |
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