Eric Fiselier | 257fd69 | 2016-05-07 01:04:55 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | // UNSUPPORTED: c++98, c++03 |
| 11 | |
| 12 | // <experimental/memory_resource> |
| 13 | |
| 14 | // template <class T> class polymorphic_allocator |
| 15 | |
| 16 | // template <class U, class ...Args> |
| 17 | // void polymorphic_allocator<T>::construct(U *, Args &&...) |
| 18 | |
| 19 | #include <experimental/memory_resource> |
| 20 | #include <type_traits> |
| 21 | #include <cassert> |
| 22 | #include <cstdlib> |
| 23 | #include "uses_alloc_types.hpp" |
| 24 | #include "test_allocator.h" |
| 25 | |
| 26 | namespace ex = std::experimental::pmr; |
| 27 | |
| 28 | template <class T> |
| 29 | struct PMATest { |
| 30 | TestResource R; |
| 31 | ex::polymorphic_allocator<T> A; |
| 32 | T* ptr; |
| 33 | bool constructed; |
| 34 | |
| 35 | PMATest() : A(&R), ptr(A.allocate(1)), constructed(false) {} |
| 36 | |
| 37 | template <class ...Args> |
| 38 | void construct(Args&&... args) { |
| 39 | A.construct(ptr, std::forward<Args>(args)...); |
| 40 | constructed = true; |
| 41 | } |
| 42 | |
| 43 | ~PMATest() { |
| 44 | if (constructed) A.destroy(ptr); |
| 45 | A.deallocate(ptr, 1); |
| 46 | } |
| 47 | }; |
| 48 | |
| 49 | template <class T, class ...Args> |
| 50 | bool doTest(UsesAllocatorType UAExpect, Args&&... args) |
| 51 | { |
| 52 | PMATest<T> TH; |
| 53 | // UNDER TEST // |
| 54 | TH.construct(std::forward<Args>(args)...); |
| 55 | return checkConstruct<Args&&...>(*TH.ptr, UAExpect, &TH.R); |
| 56 | // ------- // |
| 57 | } |
| 58 | |
| 59 | |
| 60 | template <class T, class ...Args> |
| 61 | bool doTestUsesAllocV0(Args&&... args) |
| 62 | { |
| 63 | PMATest<T> TH; |
| 64 | // UNDER TEST // |
| 65 | TH.construct(std::forward<Args>(args)...); |
| 66 | return checkConstruct<Args&&...>(*TH.ptr, UA_None); |
| 67 | // -------- // |
| 68 | } |
| 69 | |
| 70 | |
| 71 | template <class T, class EAlloc, class ...Args> |
| 72 | bool doTestUsesAllocV1(EAlloc const& ealloc, Args&&... args) |
| 73 | { |
| 74 | PMATest<T> TH; |
| 75 | // UNDER TEST // |
| 76 | TH.construct(std::allocator_arg, ealloc, std::forward<Args>(args)...); |
| 77 | return checkConstruct<Args&&...>(*TH.ptr, UA_AllocArg, ealloc); |
| 78 | // -------- // |
| 79 | } |
| 80 | |
| 81 | template <class T, class EAlloc, class ...Args> |
| 82 | bool doTestUsesAllocV2(EAlloc const& ealloc, Args&&... args) |
| 83 | { |
| 84 | PMATest<T> TH; |
| 85 | // UNDER TEST // |
| 86 | TH.construct(std::forward<Args>(args)..., ealloc); |
| 87 | return checkConstruct<Args&&...>(*TH.ptr, UA_AllocLast, ealloc); |
| 88 | // -------- // |
| 89 | } |
| 90 | |
| 91 | template <class Alloc, class ...Args> |
| 92 | void test_pmr_uses_alloc(Args&&... args) |
| 93 | { |
| 94 | TestResource R(12435); |
| 95 | ex::memory_resource* M = &R; |
| 96 | { |
| 97 | // NotUsesAllocator provides valid signatures for each uses-allocator |
| 98 | // construction but does not supply the required allocator_type typedef. |
| 99 | // Test that we can call these constructors manually without |
| 100 | // polymorphic_allocator interfering. |
| 101 | using T = NotUsesAllocator<Alloc, sizeof...(Args)>; |
| 102 | assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...)); |
| 103 | assert((doTestUsesAllocV1<T>(M, std::forward<Args>(args)...))); |
| 104 | assert((doTestUsesAllocV2<T>(M, std::forward<Args>(args)...))); |
| 105 | } |
| 106 | { |
| 107 | // Test T(std::allocator_arg_t, Alloc const&, Args...) construction |
| 108 | using T = UsesAllocatorV1<Alloc, sizeof...(Args)>; |
| 109 | assert((doTest<T>(UA_AllocArg, std::forward<Args>(args)...))); |
| 110 | } |
| 111 | { |
| 112 | // Test T(Args..., Alloc const&) construction |
| 113 | using T = UsesAllocatorV2<Alloc, sizeof...(Args)>; |
| 114 | assert((doTest<T>(UA_AllocLast, std::forward<Args>(args)...))); |
| 115 | } |
| 116 | { |
| 117 | // Test that T(std::allocator_arg_t, Alloc const&, Args...) construction |
| 118 | // is prefered when T(Args..., Alloc const&) is also available. |
| 119 | using T = UsesAllocatorV3<Alloc, sizeof...(Args)>; |
| 120 | assert((doTest<T>(UA_AllocArg, std::forward<Args>(args)...))); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | // Test that polymorphic_allocator does not prevent us from manually |
| 125 | // doing non-pmr uses-allocator construction. |
| 126 | template <class Alloc, class AllocObj, class ...Args> |
| 127 | void test_non_pmr_uses_alloc(AllocObj const& A, Args&&... args) |
| 128 | { |
| 129 | { |
| 130 | using T = NotUsesAllocator<Alloc, sizeof...(Args)>; |
| 131 | assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...)); |
| 132 | assert((doTestUsesAllocV1<T>(A, std::forward<Args>(args)...))); |
| 133 | assert((doTestUsesAllocV2<T>(A, std::forward<Args>(args)...))); |
| 134 | } |
| 135 | { |
| 136 | using T = UsesAllocatorV1<Alloc, sizeof...(Args)>; |
| 137 | assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...)); |
| 138 | assert((doTestUsesAllocV1<T>(A, std::forward<Args>(args)...))); |
| 139 | } |
| 140 | { |
| 141 | using T = UsesAllocatorV2<Alloc, sizeof...(Args)>; |
| 142 | assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...)); |
| 143 | assert((doTestUsesAllocV2<T>(A, std::forward<Args>(args)...))); |
| 144 | } |
| 145 | { |
| 146 | using T = UsesAllocatorV3<Alloc, sizeof...(Args)>; |
| 147 | assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...)); |
| 148 | assert((doTestUsesAllocV1<T>(A, std::forward<Args>(args)...))); |
| 149 | assert((doTestUsesAllocV2<T>(A, std::forward<Args>(args)...))); |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | int main() |
| 154 | { |
| 155 | using ET = std::experimental::erased_type; |
| 156 | using PMR = ex::memory_resource*; |
| 157 | using PMA = ex::polymorphic_allocator<void>; |
| 158 | using STDA = std::allocator<char>; |
| 159 | using TESTA = test_allocator<char>; |
| 160 | |
| 161 | int value = 42; |
| 162 | const int cvalue = 43; |
| 163 | { |
| 164 | test_pmr_uses_alloc<ET>(); |
| 165 | test_pmr_uses_alloc<PMR>(); |
| 166 | test_pmr_uses_alloc<PMA>(); |
| 167 | test_pmr_uses_alloc<ET>(value); |
| 168 | test_pmr_uses_alloc<PMR>(value); |
| 169 | test_pmr_uses_alloc<PMA>(value); |
| 170 | test_pmr_uses_alloc<ET>(cvalue); |
| 171 | test_pmr_uses_alloc<PMR>(cvalue); |
| 172 | test_pmr_uses_alloc<PMA>(cvalue); |
| 173 | test_pmr_uses_alloc<ET>(cvalue, std::move(value)); |
| 174 | test_pmr_uses_alloc<PMR>(cvalue, std::move(value)); |
| 175 | test_pmr_uses_alloc<PMA>(cvalue, std::move(value)); |
| 176 | } |
| 177 | { |
| 178 | STDA std_alloc; |
| 179 | TESTA test_alloc(42); |
| 180 | test_non_pmr_uses_alloc<STDA>(std_alloc); |
| 181 | test_non_pmr_uses_alloc<TESTA>(test_alloc); |
| 182 | test_non_pmr_uses_alloc<STDA>(std_alloc, value); |
| 183 | test_non_pmr_uses_alloc<TESTA>(test_alloc, value); |
| 184 | test_non_pmr_uses_alloc<STDA>(std_alloc, cvalue); |
| 185 | test_non_pmr_uses_alloc<TESTA>(test_alloc, cvalue); |
| 186 | test_non_pmr_uses_alloc<STDA>(std_alloc, cvalue, std::move(value)); |
| 187 | test_non_pmr_uses_alloc<TESTA>(test_alloc, cvalue, std::move(value)); |
| 188 | } |
| 189 | } |