2eb2ff2a02
The macro that opts out of `std::ranges::` functionality is called `_LIBCPP_HAS_NO_INCOMPLETE_RANGES`, and is unrelated to this macro which is specifically about _compiler_ support for the _syntax_. The only non-mechanical diff here is in `<__config>`. Differential Revision: https://reviews.llvm.org/D118507
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___MEMORY_CONCEPTS_H
|
|
#define _LIBCPP___MEMORY_CONCEPTS_H
|
|
|
|
#include <__config>
|
|
#include <__iterator/concepts.h>
|
|
#include <__iterator/iterator_traits.h>
|
|
#include <__iterator/readable_traits.h>
|
|
#include <__ranges/access.h>
|
|
#include <__ranges/concepts.h>
|
|
#include <concepts>
|
|
#include <type_traits>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
#pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_CONCEPTS)
|
|
namespace ranges {
|
|
|
|
// [special.mem.concepts]
|
|
|
|
// This concept ensures that uninitialized algorithms can construct an object
|
|
// at the address pointed-to by the iterator, which requires an lvalue.
|
|
template <class _Ip>
|
|
concept __nothrow_input_iterator =
|
|
input_iterator<_Ip> &&
|
|
is_lvalue_reference_v<iter_reference_t<_Ip>> &&
|
|
same_as<remove_cvref_t<iter_reference_t<_Ip>>, iter_value_t<_Ip>>;
|
|
|
|
template <class _Sp, class _Ip>
|
|
concept __nothrow_sentinel_for = sentinel_for<_Sp, _Ip>;
|
|
|
|
template <class _Rp>
|
|
concept __nothrow_input_range =
|
|
range<_Rp> &&
|
|
__nothrow_input_iterator<iterator_t<_Rp>> &&
|
|
__nothrow_sentinel_for<sentinel_t<_Rp>, iterator_t<_Rp>>;
|
|
|
|
template <class _Ip>
|
|
concept __nothrow_forward_iterator =
|
|
__nothrow_input_iterator<_Ip> &&
|
|
forward_iterator<_Ip> &&
|
|
__nothrow_sentinel_for<_Ip, _Ip>;
|
|
|
|
template <class _Rp>
|
|
concept __nothrow_forward_range =
|
|
__nothrow_input_range<_Rp> &&
|
|
__nothrow_forward_iterator<iterator_t<_Rp>>;
|
|
|
|
} // namespace ranges
|
|
#endif // !defined(_LIBCPP_HAS_NO_CONCEPTS)
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___MEMORY_CONCEPTS_H
|