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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// template<class In, class Out>
// concept indirectly_copyable;
#include <iterator>
#include "MoveOnly.h"
#include "test_macros.h"
struct CopyOnly {
CopyOnly() = default;
CopyOnly(CopyOnly const&) = default;
CopyOnly& operator=(CopyOnly const&) = default;
CopyOnly(CopyOnly&&) = delete;
CopyOnly& operator=(CopyOnly&&) = delete;
};
// Can copy the underlying objects between pointers.
static_assert( std::indirectly_copyable<int*, int*>);
static_assert( std::indirectly_copyable<const int*, int *>);
// Can't copy if the output pointer is const.
static_assert(!std::indirectly_copyable<int*, const int *>);
static_assert(!std::indirectly_copyable<const int*, const int *>);
// Can copy from a pointer into an array but arrays aren't considered indirectly copyable-from.
static_assert( std::indirectly_copyable<int*, int[2]>);
static_assert(!std::indirectly_copyable<int[2], int*>);
static_assert(!std::indirectly_copyable<int[2], int[2]>);
static_assert(!std::indirectly_copyable<int(&)[2], int(&)[2]>);
// Can't copy between non-pointer types.
static_assert(!std::indirectly_copyable<int*, int>);
static_assert(!std::indirectly_copyable<int, int*>);
static_assert(!std::indirectly_copyable<int, int>);
// Check some less common types.
static_assert(!std::indirectly_movable<void*, void*>);
static_assert(!std::indirectly_movable<int*, void*>);
static_assert(!std::indirectly_movable<int(), int()>);
static_assert(!std::indirectly_movable<int*, int()>);
static_assert(!std::indirectly_movable<void, void>);
// Can't copy move-only objects.
static_assert(!std::indirectly_copyable<MoveOnly*, MoveOnly*>);
static_assert(!std::indirectly_copyable<MoveOnly*, const MoveOnly*>);
static_assert(!std::indirectly_copyable<const MoveOnly*, MoveOnly*>);
static_assert(!std::indirectly_copyable<const MoveOnly*, const MoveOnly*>);
// Can copy copy-only objects.
static_assert( std::indirectly_copyable<CopyOnly*, CopyOnly*>);
static_assert(!std::indirectly_copyable<CopyOnly*, const CopyOnly*>);
static_assert( std::indirectly_copyable<const CopyOnly*, CopyOnly*>);
static_assert(!std::indirectly_copyable<const CopyOnly*, const CopyOnly*>);
template<class T>
struct PointerTo {
using value_type = T;
T& operator*() const;
};
// Can copy through a dereferenceable class.
static_assert( std::indirectly_copyable<int*, PointerTo<int>>);
static_assert(!std::indirectly_copyable<int*, PointerTo<const int>>);
static_assert( std::indirectly_copyable<PointerTo<int>, PointerTo<int>>);
static_assert(!std::indirectly_copyable<PointerTo<int>, PointerTo<const int>>);
static_assert( std::indirectly_copyable<CopyOnly*, PointerTo<CopyOnly>>);
static_assert( std::indirectly_copyable<PointerTo<CopyOnly>, CopyOnly*>);
static_assert( std::indirectly_copyable<PointerTo<CopyOnly>, PointerTo<CopyOnly>>);
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