63 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 11// template<class In, class Out>12// concept indirectly_movable;13 14#include <iterator>15 16#include "MoveOnly.h"17#include "test_macros.h"18 19// Can move between pointers.20static_assert( std::indirectly_movable<int*, int*>);21static_assert( std::indirectly_movable<const int*, int*>);22static_assert(!std::indirectly_movable<int*, const int*>);23static_assert( std::indirectly_movable<const int*, int*>);24 25// Can move from a pointer into an array but arrays aren't considered indirectly movable-from.26static_assert( std::indirectly_movable<int*, int[2]>);27static_assert(!std::indirectly_movable<int[2], int*>);28static_assert(!std::indirectly_movable<int[2], int[2]>);29static_assert(!std::indirectly_movable<int(&)[2], int(&)[2]>);30 31// Can't move between non-pointer types.32static_assert(!std::indirectly_movable<int*, int>);33static_assert(!std::indirectly_movable<int, int*>);34static_assert(!std::indirectly_movable<int, int>);35 36// Check some less common types.37static_assert(!std::indirectly_movable<void*, void*>);38static_assert(!std::indirectly_movable<int*, void*>);39static_assert(!std::indirectly_movable<int(), int()>);40static_assert(!std::indirectly_movable<int*, int()>);41static_assert(!std::indirectly_movable<void, void>);42 43// Can move move-only objects.44static_assert( std::indirectly_movable<MoveOnly*, MoveOnly*>);45static_assert(!std::indirectly_movable<MoveOnly*, const MoveOnly*>);46static_assert(!std::indirectly_movable<const MoveOnly*, const MoveOnly*>);47static_assert(!std::indirectly_movable<const MoveOnly*, MoveOnly*>);48 49template<class T>50struct PointerTo {51 using value_type = T;52 T& operator*() const;53};54 55// Can copy through a dereferenceable class.56static_assert( std::indirectly_movable<int*, PointerTo<int>>);57static_assert(!std::indirectly_movable<int*, PointerTo<const int>>);58static_assert( std::indirectly_copyable<PointerTo<int>, PointerTo<int>>);59static_assert(!std::indirectly_copyable<PointerTo<int>, PointerTo<const int>>);60static_assert( std::indirectly_movable<MoveOnly*, PointerTo<MoveOnly>>);61static_assert( std::indirectly_movable<PointerTo<MoveOnly>, MoveOnly*>);62static_assert( std::indirectly_movable<PointerTo<MoveOnly>, PointerTo<MoveOnly>>);63