| 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 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // template<class In, class Out> |
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| 12 | // concept indirectly_movable; |
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| 13 | |
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| 14 | #include <iterator> |
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| 15 | |
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| 16 | #include "MoveOnly.h" |
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| 17 | #include "test_macros.h" |
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| 18 | |
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| 19 | // Can move between pointers. |
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| 20 | static_assert( std::indirectly_movable<int*, int*>); |
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| 21 | static_assert( std::indirectly_movable<const int*, int*>); |
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| 22 | static_assert(!std::indirectly_movable<int*, const int*>); |
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| 23 | static_assert( std::indirectly_movable<const int*, int*>); |
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| 24 | |
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| 25 | // Can move from a pointer into an array but arrays aren't considered indirectly movable-from. |
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| 26 | static_assert( std::indirectly_movable<int*, int[2]>); |
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| 27 | static_assert(!std::indirectly_movable<int[2], int*>); |
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| 28 | static_assert(!std::indirectly_movable<int[2], int[2]>); |
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| 29 | static_assert(!std::indirectly_movable<int(&)[2], int(&)[2]>); |
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| 30 | |
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| 31 | // Can't move between non-pointer types. |
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| 32 | static_assert(!std::indirectly_movable<int*, int>); |
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| 33 | static_assert(!std::indirectly_movable<int, int*>); |
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| 34 | static_assert(!std::indirectly_movable<int, int>); |
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| 35 | |
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| 36 | // Check some less common types. |
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| 37 | static_assert(!std::indirectly_movable<void*, void*>); |
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| 38 | static_assert(!std::indirectly_movable<int*, void*>); |
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| 39 | static_assert(!std::indirectly_movable<int(), int()>); |
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| 40 | static_assert(!std::indirectly_movable<int*, int()>); |
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| 41 | static_assert(!std::indirectly_movable<void, void>); |
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| 42 | |
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| 43 | // Can move move-only objects. |
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| 44 | static_assert( std::indirectly_movable<MoveOnly*, MoveOnly*>); |
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| 45 | static_assert(!std::indirectly_movable<MoveOnly*, const MoveOnly*>); |
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| 46 | static_assert(!std::indirectly_movable<const MoveOnly*, const MoveOnly*>); |
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| 47 | static_assert(!std::indirectly_movable<const MoveOnly*, MoveOnly*>); |
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| 48 | |
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| 49 | template<class T> |
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| 50 | struct PointerTo { |
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| 51 | using value_type = T; |
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| 52 | T& operator*() const; |
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| 53 | }; |
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| 54 | |
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| 55 | // Can copy through a dereferenceable class. |
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| 56 | static_assert( std::indirectly_movable<int*, PointerTo<int>>); |
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| 57 | static_assert(!std::indirectly_movable<int*, PointerTo<const int>>); |
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| 58 | static_assert( std::indirectly_copyable<PointerTo<int>, PointerTo<int>>); |
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| 59 | static_assert(!std::indirectly_copyable<PointerTo<int>, PointerTo<const int>>); |
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| 60 | static_assert( std::indirectly_movable<MoveOnly*, PointerTo<MoveOnly>>); |
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| 61 | static_assert( std::indirectly_movable<PointerTo<MoveOnly>, MoveOnly*>); |
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| 62 | static_assert( std::indirectly_movable<PointerTo<MoveOnly>, PointerTo<MoveOnly>>); |
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| 63 | |
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