1// -*- C++ -*- 2//===--------------------------- ranges -----------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_RANGES 11#define _LIBCPP_RANGES 12 13/* 14 15#include <compare> // see [compare.syn] 16#include <initializer_list> // see [initializer.list.syn] 17#include <iterator> // see [iterator.synopsis] 18 19namespace std::ranges { 20 inline namespace unspecified { 21 // [range.access], range access 22 inline constexpr unspecified begin = unspecified; 23 inline constexpr unspecified end = unspecified; 24 inline constexpr unspecified cbegin = unspecified; 25 inline constexpr unspecified cend = unspecified; 26 27 inline constexpr unspecified size = unspecified; 28 inline constexpr unspecified ssize = unspecified; 29 } 30 31 // [range.range], ranges 32 template<class T> 33 concept range = see below; 34 35 template<class T> 36 inline constexpr bool enable_borrowed_range = false; 37 38 template<class T> 39 using iterator_t = decltype(ranges::begin(declval<T&>())); 40 template<class T> 41 using iterator_t = decltype(ranges::begin(declval<T&>())); 42 template<range R> 43 using sentinel_t = decltype(ranges::end(declval<R&>())); 44 template<range R> 45 using range_difference_t = iter_difference_t<iterator_t<R>>; 46 template<range R> 47 using range_value_t = iter_value_t<iterator_t<R>>; 48 template<range R> 49 using range_reference_t = iter_reference_t<iterator_t<R>>; 50 template<range R> 51 using range_rvalue_reference_t = iter_rvalue_reference_t<iterator_t<R>>; 52 53 // [range.sized], sized ranges 54 template<class> 55 inline constexpr bool disable_sized_range = false; 56 57 template<class T> 58 concept sized_range = ...; 59 60 // [range.view], views 61 template<class T> 62 inline constexpr bool enable_view = ...; 63 64 struct view_base { }; 65 66 template<class T> 67 concept view = ...; 68 69 // [range.refinements], other range refinements 70 template<class T> 71 concept input_range = see below; 72 73 template<class T> 74 concept forward_range = see below; 75 76 template<class T> 77 concept bidirectional_range = see below; 78 79 template<class T> 80 concept random_access_range = see below; 81 82 template<class T> 83 concept contiguous_range = see below; 84 85 template <class _Tp> 86 concept common_range = see below; 87 88 template<class T> 89 concept viewable_range = see below; 90 91 // [view.interface], class template view_interface 92 template<class D> 93 requires is_class_v<D> && same_as<D, remove_cv_t<D>> 94 class view_interface; 95 96 // [range.subrange], sub-ranges 97 enum class subrange_kind : bool { unsized, sized }; 98 99 template<input_or_output_iterator I, sentinel_for<I> S = I, subrange_kind K = see below> 100 requires (K == subrange_kind::sized || !sized_sentinel_for<S, I>) 101 class subrange; 102 103 template<class I, class S, subrange_kind K> 104 inline constexpr bool enable_borrowed_range<subrange<I, S, K>> = true; 105 106 // [range.dangling], dangling iterator handling 107 struct dangling; 108 109 template<range R> 110 using borrowed_iterator_t = see below; 111 112 template<range R> 113 using borrowed_subrange_t = see below; 114 115 // [range.empty], empty view 116 template<class T> 117 requires is_object_v<T> 118 class empty_view; 119 120 // [range.all], all view 121 namespace views { 122 inline constexpr unspecified all = unspecified; 123 124 template<viewable_range R> 125 using all_t = decltype(all(declval<R>())); 126 } 127 128 template<range R> 129 requires is_object_v<R> 130 class ref_view; 131 132 template<class T> 133 inline constexpr bool enable_borrowed_range<ref_view<T>> = true; 134 135 // [range.drop], drop view 136 template<view V> 137 class drop_view; 138 139 template<class T> 140 inline constexpr bool enable_borrowed_range<drop_view<T>> = enable_borrowed_range<T>; 141 142 // [range.transform], transform view 143 template<input_range V, copy_constructible F> 144 requires view<V> && is_object_v<F> && 145 regular_invocable<F&, range_reference_t<V>> && 146 can-reference<invoke_result_t<F&, range_reference_t<V>>> 147 class transform_view; 148 149 // [range.common], common view 150 template<view V> 151 requires (!common_range<V> && copyable<iterator_t<V>>) 152 class common_view; 153 154 template<class T> 155 inline constexpr bool enable_borrowed_range<common_view<T>> = enable_borrowed_range<T>; 156} 157 158*/ 159 160#include <__config> 161#include <__ranges/access.h> 162#include <__ranges/all.h> 163#include <__ranges/common_view.h> 164#include <__ranges/concepts.h> 165#include <__ranges/dangling.h> 166#include <__ranges/data.h> 167#include <__ranges/drop_view.h> 168#include <__ranges/empty.h> 169#include <__ranges/empty_view.h> 170#include <__ranges/enable_borrowed_range.h> 171#include <__ranges/enable_view.h> 172#include <__ranges/ref_view.h> 173#include <__ranges/size.h> 174#include <__ranges/subrange.h> 175#include <__ranges/transform_view.h> 176#include <__ranges/view_interface.h> 177#include <compare> // Required by the standard. 178#include <initializer_list> // Required by the standard. 179#include <iterator> // Required by the standard. 180#include <type_traits> 181#include <version> 182 183#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 184#pragma GCC system_header 185#endif 186 187_LIBCPP_PUSH_MACROS 188#include <__undef_macros> 189 190_LIBCPP_BEGIN_NAMESPACE_STD 191 192#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_RANGES) 193 194#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_RANGES) 195 196_LIBCPP_END_NAMESPACE_STD 197 198_LIBCPP_POP_MACROS 199 200#endif // _LIBCPP_RANGES 201