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Implement constexpr versions of the meow_memmove helpers
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| # Copyright (c) Microsoft Corporation. | ||
| # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
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| RUNALL_INCLUDE ..\usual_latest_matrix.lst |
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| // Copyright (c) Microsoft Corporation. | ||
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
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| #include <algorithm> | ||
| #include <assert.h> | ||
| #include <memory> | ||
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| #pragma warning(disable : 4582) // '%s': constructor is not implicitly called | ||
| #pragma warning(disable : 4583) // '%s': destructor is not implicitly called | ||
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| using namespace std; | ||
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| struct int_wrapper_copy { | ||
| constexpr int_wrapper_copy() = default; | ||
| constexpr int_wrapper_copy(const int v) : _val(v){}; | ||
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| constexpr int_wrapper_copy(const int_wrapper_copy& other) : _val(other._val) {} | ||
| constexpr int_wrapper_copy& operator=(const int_wrapper_copy& other) { | ||
| _val = other._val; | ||
| return *this; | ||
| } | ||
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| constexpr int_wrapper_copy(int_wrapper_copy&&) = delete; | ||
| constexpr int_wrapper_copy& operator=(int_wrapper_copy&&) = delete; | ||
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| constexpr bool operator==(const int_wrapper_copy&) const = default; | ||
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| int _val = 0; | ||
| }; | ||
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| struct int_wrapper_move { | ||
| constexpr int_wrapper_move() = default; | ||
| constexpr int_wrapper_move(const int v) : _val(v){}; | ||
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| constexpr int_wrapper_move(const int_wrapper_move&) = delete; | ||
| constexpr int_wrapper_move& operator=(const int_wrapper_move&) = delete; | ||
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| constexpr int_wrapper_move(int_wrapper_move&& other) : _val(exchange(other._val, -1)) {} | ||
| constexpr int_wrapper_move& operator=(int_wrapper_move&& other) { | ||
| _val = exchange(other._val, -1); | ||
| return *this; | ||
| } | ||
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| constexpr bool operator==(const int_wrapper_move&) const = default; | ||
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| int _val = 0; | ||
| }; | ||
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| static constexpr int_wrapper_copy expected_copy[] = {1, 2, 3, 4}; | ||
| static constexpr int_wrapper_move expected_move[] = {1, 2, 3, 4}; | ||
| static constexpr int_wrapper_move expected_after_move[] = {-1, -1, -1, -1}; | ||
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| constexpr bool test() { | ||
| { // _Copy_unchecked | ||
| int_wrapper_copy input[] = {1, 2, 3, 4}; | ||
| int_wrapper_copy output[4] = {5, 6, 7, 8}; | ||
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| const same_as<int_wrapper_copy*> auto result = _Copy_unchecked(begin(input), end(input), begin(output)); | ||
| assert(result == end(output)); | ||
| assert(equal(begin(expected_copy), end(expected_copy), begin(output), end(output))); | ||
| } | ||
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| { // _Copy_backward_unchecked | ||
| int_wrapper_copy input[] = {1, 2, 3, 4}; | ||
| int_wrapper_copy output[4] = {5, 6, 7, 8}; | ||
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| const same_as<int_wrapper_copy*> auto result = _Copy_backward_unchecked(begin(input), end(input), end(output)); | ||
| assert(result == begin(output)); | ||
| assert(equal(begin(expected_copy), end(expected_copy), begin(output), end(output))); | ||
| } | ||
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| #if _HAS_CXX20 && defined(__cpp_constexpr_dynamic_alloc) | ||
| { // _Uninitialized_copy_unchecked | ||
| int_wrapper_copy input[] = {1, 2, 3, 4}; | ||
| int_wrapper_copy output[4]; | ||
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| const same_as<int_wrapper_copy*> auto result = | ||
| _Uninitialized_copy_unchecked(begin(input), end(input), begin(output)); | ||
| assert(result == end(output)); | ||
| assert(equal(begin(expected_copy), end(expected_copy), begin(output), end(output))); | ||
| } | ||
| #endif // _HAS_CXX20 && defined(__cpp_constexpr_dynamic_alloc) | ||
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| { // _Move_unchecked | ||
| int_wrapper_move input[] = {1, 2, 3, 4}; | ||
| int_wrapper_move output[4] = {5, 6, 7, 8}; | ||
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| const same_as<int_wrapper_move*> auto result = _Move_unchecked(begin(input), end(input), begin(output)); | ||
| assert(result == end(output)); | ||
| assert(equal(begin(expected_move), end(expected_move), begin(output), end(output))); | ||
| if (is_constant_evaluated()) { | ||
| assert(equal(begin(input), end(input), begin(expected_after_move), end(expected_after_move))); | ||
| } | ||
| } | ||
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| { // _Move_backward_unchecked | ||
| int_wrapper_move input[] = {1, 2, 3, 4}; | ||
| int_wrapper_move output[4] = {5, 6, 7, 8}; | ||
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| const same_as<int_wrapper_move*> auto result = _Move_backward_unchecked(begin(input), end(input), end(output)); | ||
| assert(result == begin(output)); | ||
| assert(equal(begin(expected_move), end(expected_move), begin(output), end(output))); | ||
| if (is_constant_evaluated()) { | ||
| assert(equal(begin(input), end(input), begin(expected_after_move), end(expected_after_move))); | ||
| } | ||
| } | ||
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| { // _Move_backward_common | ||
| int_wrapper_move input[] = {1, 2, 3, 4}; | ||
| int_wrapper_move output[4] = {5, 6, 7, 8}; | ||
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| const same_as<int_wrapper_move*> auto result = | ||
| ranges::_Move_backward_common(begin(input), end(input), end(output)); | ||
| assert(result == begin(output)); | ||
| assert(equal(begin(expected_move), end(expected_move), begin(output), end(output))); | ||
| if (is_constant_evaluated()) { | ||
| assert(equal(begin(input), end(input), begin(expected_after_move), end(expected_after_move))); | ||
| } | ||
| } | ||
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| #if _HAS_CXX20 && defined(__cpp_constexpr_dynamic_alloc) | ||
| { // _Uninitialized_move_unchecked | ||
| int_wrapper_move input[] = {1, 2, 3, 4}; | ||
| int_wrapper_move output[4]; | ||
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| const same_as<int_wrapper_move*> auto result = | ||
| _Uninitialized_move_unchecked(begin(input), end(input), begin(output)); | ||
| assert(result == end(output)); | ||
| assert(equal(begin(expected_move), end(expected_move), begin(output), end(output))); | ||
| if (is_constant_evaluated()) { | ||
| assert(equal(begin(input), end(input), begin(expected_after_move), end(expected_after_move))); | ||
| } | ||
| } | ||
| #endif // _HAS_CXX20 && defined(__cpp_constexpr_dynamic_alloc) | ||
| return true; | ||
| } | ||
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| int main() { | ||
| test(); | ||
| static_assert(test()); | ||
| } |