// -*- 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_RANGES
#define _LIBCPP_RANGES
/*
#include <compare> // see [compare.syn]
#include <initializer_list> // see [initializer.list.syn]
#include <iterator> // see [iterator.synopsis]
namespace std::ranges {
inline namespace unspecified {
// [range.access], range access
inline constexpr unspecified begin = unspecified;
inline constexpr unspecified end = unspecified;
inline constexpr unspecified cbegin = unspecified;
inline constexpr unspecified cend = unspecified;
inline constexpr unspecified size = unspecified;
inline constexpr unspecified ssize = unspecified;
}
// [range.range], ranges
template<class T>
concept range = see below;
template<class T>
inline constexpr bool enable_borrowed_range = false;
template<class T>
using iterator_t = decltype(ranges::begin(declval<T&>()));
template<range R>
using sentinel_t = decltype(ranges::end(declval<R&>()));
template<range R>
using range_difference_t = iter_difference_t<iterator_t<R>>;
template<sized_range R>
using range_size_t = decltype(ranges::size(declval<R&>()));
template<range R>
using range_value_t = iter_value_t<iterator_t<R>>;
template<range R>
using range_reference_t = iter_reference_t<iterator_t<R>>;
template<range R>
using range_rvalue_reference_t = iter_rvalue_reference_t<iterator_t<R>>;
template <range R>
using range_common_reference_t = iter_common_reference_t<iterator_t<R>>;
// [range.sized], sized ranges
template<class>
inline constexpr bool disable_sized_range = false;
template<class T>
concept sized_range = ...;
// [range.view], views
template<class T>
inline constexpr bool enable_view = ...;
struct view_base { };
template<class T>
concept view = ...;
// [range.refinements], other range refinements
template<class R, class T>
concept output_range = see below;
template<class T>
concept input_range = see below;
template<class T>
concept forward_range = see below;
template<class T>
concept bidirectional_range = see below;
template<class T>
concept random_access_range = see below;
template<class T>
concept contiguous_range = see below;
template <class _Tp>
concept common_range = see below;
template<class T>
concept viewable_range = see below;
// [range.adaptor.object], range adaptor objects
template<class D>
requires is_class_v<D> && same_as<D, remove_cv_t<D>>
class range_adaptor_closure { }; // Since c++23
// [view.interface], class template view_interface
template<class D>
requires is_class_v<D> && same_as<D, remove_cv_t<D>>
class view_interface;
// [range.subrange], sub-ranges
enum class subrange_kind : bool { unsized, sized };
template<input_or_output_iterator I, sentinel_for<I> S = I, subrange_kind K = see below>
requires (K == subrange_kind::sized || !sized_sentinel_for<S, I>)
class subrange;
template<class I, class S, subrange_kind K>
inline constexpr bool enable_borrowed_range<subrange<I, S, K>> = true;
// [range.dangling], dangling iterator handling
struct dangling;
template<range R>
using borrowed_iterator_t = see below;
template<range R>
using borrowed_subrange_t = see below;
// [range.elements], elements view
template<input_range V, size_t N>
requires see below
class elements_view;
template<class T, size_t N>
inline constexpr bool enable_borrowed_range<elements_view<T, N>> =
enable_borrowed_range<T>;
template<class R>
using keys_view = elements_view<R, 0>;
template<class R>
using values_view = elements_view<R, 1>;
namespace views {
template<size_t N>
inline constexpr unspecified elements = unspecified;
inline constexpr auto keys = elements<0>;
inline constexpr auto values = elements<1>;
}
// [range.utility.conv], range conversions
template<class C, input_range R, class... Args> requires (!view<C>)
constexpr C to(R&& r, Args&&... args); // Since C++23
template<template<class...> class C, input_range R, class... Args>
constexpr auto to(R&& r, Args&&... args); // Since C++23
template<class C, class... Args> requires (!view<C>)
constexpr auto to(Args&&... args); // Since C++23
template<template<class...> class C, class... Args>
constexpr auto to(Args&&... args); // Since C++23
// [range.empty], empty view
template<class T>
requires is_object_v<T>
class empty_view;
template<class T>
inline constexpr bool enable_borrowed_range<empty_view<T>> = true;
namespace views {
template<class T>
inline constexpr empty_view<T> empty{};
}
// [range.all], all view
namespace views {
inline constexpr unspecified all = unspecified;
template<viewable_range R>
using all_t = decltype(all(declval<R>()));
}
template<range R>
requires is_object_v<R>
class ref_view;
template<class T>
inline constexpr bool enable_borrowed_range<ref_view<T>> = true;
template<range R>
requires see below
class owning_view;
template<class T>
inline constexpr bool enable_borrowed_range<owning_view<T>> = enable_borrowed_range<T>;
// [range.filter], filter view
template<input_range V, indirect_unary_predicate<iterator_t<V>> Pred>
requires view<V> && is_object_v<Pred>
class filter_view;
namespace views {
inline constexpr unspecified filter = unspecified;
}
// [range.drop], drop view
template<view V>
class drop_view;
template<class T>
inline constexpr bool enable_borrowed_range<drop_view<T>> = enable_borrowed_range<T>;
// [range.drop.while], drop while view
template<view V, class Pred>
requires input_range<V> && is_object_v<Pred> &&
indirect_unary_predicate<const Pred, iterator_t<V>>
class drop_while_view;
template<class T, class Pred>
inline constexpr bool enable_borrowed_range<drop_while_view<T, Pred>> =
enable_borrowed_range<T>;
namespace views { inline constexpr unspecified drop_while = unspecified; }
// [range.transform], transform view
template<input_range V, copy_constructible F>
requires view<V> && is_object_v<F> &&
regular_invocable<F&, range_reference_t<V>> &&
can-reference<invoke_result_t<F&, range_reference_t<V>>>
class transform_view;
// [range.counted], counted view
namespace views { inline constexpr unspecified counted = unspecified; }
// [range.common], common view
template<view V>
requires (!common_range<V> && copyable<iterator_t<V>>)
class common_view;
// [range.reverse], reverse view
template<view V>
requires bidirectional_range<V>
class reverse_view;
template<class T>
inline constexpr bool enable_borrowed_range<reverse_view<T>> = enable_borrowed_range<T>;
template<class T>
inline constexpr bool enable_borrowed_range<common_view<T>> = enable_borrowed_range<T>;
// [range.take], take view
template<view> class take_view;
template<class T>
inline constexpr bool enable_borrowed_range<take_view<T>> = enable_borrowed_range<T>;
// [range.take.while], take while view
template<view V, class Pred>
requires input_range<V> && is_object_v<Pred> &&
indirect_unary_predicate<const Pred, iterator_t<V>>
class take_while_view;
namespace views { inline constexpr unspecified take_while = unspecified; }
template<copy_constructible T>
requires is_object_v<T>
class single_view;
template<weakly_incrementable W, semiregular Bound = unreachable_sentinel_t>
requires weakly-equality-comparable-with<W, Bound> && copyable<W>
class iota_view;
template<class W, class Bound>
inline constexpr bool enable_borrowed_range<iota_view<W, Bound>> = true;
// [range.repeat], repeat view
template<class T>
concept integer-like-with-usable-difference-type = // exposition only
is-signed-integer-like<T> || (is-integer-like<T> && weakly_incrementable<T>);
template<move_constructible T, semiregular Bound = unreachable_sentinel_t>
requires (is_object_v<T> && same_as<T, remove_cv_t<T>> &&
(integer-like-with-usable-difference-type<Bound> ||
same_as<Bound, unreachable_sentinel_t>))
class repeat_view;
namespace views { inline constexpr unspecified repeat = unspecified; }
// [range.join], join view
template<input_range V>
requires view<V> && input_range<range_reference_t<V>>
class join_view;
// [range.lazy.split], lazy split view
template<class R>
concept tiny-range = see below; // exposition only
template<input_range V, forward_range Pattern>
requires view<V> && view<Pattern> &&
indirectly_comparable<iterator_t<V>, iterator_t<Pattern>, ranges::equal_to> &&
(forward_range<V> || tiny-range<Pattern>)
class lazy_split_view;
// [range.split], split view
template<forward_range V, forward_range Pattern>
requires view<V> && view<Pattern> &&
indirectly_comparable<iterator_t<V>, iterator_t<Pattern>, ranges::equal_to>
class split_view;
namespace views {
inline constexpr unspecified lazy_split = unspecified;
inline constexpr unspecified split = unspecified;
}
// [range.istream], istream view
template<movable Val, class CharT, class Traits = char_traits<CharT>>
requires see below
class basic_istream_view;
template<class Val>
using istream_view = basic_istream_view<Val, char>;
template<class Val>
using wistream_view = basic_istream_view<Val, wchar_t>;
namespace views { template<class T> inline constexpr unspecified istream = unspecified; }
// [range.zip], zip view
template<input_range... Views>
requires (view<Views> && ...) && (sizeof...(Views) > 0)
class zip_view; // C++23
template<class... Views>
inline constexpr bool enable_borrowed_range<zip_view<Views...>> = // C++23
(enable_borrowed_range<Views> && ...);
namespace views { inline constexpr unspecified zip = unspecified; } // C++23
// [range.as.rvalue]
template <view V>
requires input_range<V>
class as_rvalue_view; // C++23
namespace views { inline constexpr unspecified as_rvalue ) unspecified; } // C++23
[range.chunk.by]
template<forward_range V, indirect_binary_predicate<iterator_t<V>, iterator_t<V>> Pred>
requires view<V> && is_object_v<Pred>
class chunk_by_view; // C++23
namespace views { inline constexpr unspecified chunk_by = unspecified; } // C++23
}
namespace std {
namespace views = ranges::views;
template<class T> struct tuple_size;
template<size_t I, class T> struct tuple_element;
template<class I, class S, ranges::subrange_kind K>
struct tuple_size<ranges::subrange<I, S, K>>
: integral_constant<size_t, 2> {};
template<class I, class S, ranges::subrange_kind K>
struct tuple_element<0, ranges::subrange<I, S, K>> {
using type = I;
};
template<class I, class S, ranges::subrange_kind K>
struct tuple_element<1, ranges::subrange<I, S, K>> {
using type = S;
};
template<class I, class S, ranges::subrange_kind K>
struct tuple_element<0, const ranges::subrange<I, S, K>> {
using type = I;
};
template<class I, class S, ranges::subrange_kind K>
struct tuple_element<1, const ranges::subrange<I, S, K>> {
using type = S;
};
struct from_range_t { explicit from_range_t() = default; }; // Since C++23
inline constexpr from_range_t from_range{}; // Since C++23
}
*/
#include <__config>
#if _LIBCPP_STD_VER >= 20
# include <__ranges/access.h>
# include <__ranges/all.h>
# include <__ranges/common_view.h>
# include <__ranges/concepts.h>
# include <__ranges/counted.h>
# include <__ranges/dangling.h>
# include <__ranges/data.h>
# include <__ranges/drop_view.h>
# include <__ranges/drop_while_view.h>
# include <__ranges/elements_view.h>
# include <__ranges/empty.h>
# include <__ranges/empty_view.h>
# include <__ranges/enable_borrowed_range.h>
# include <__ranges/enable_view.h>
# include <__ranges/filter_view.h>
# include <__ranges/iota_view.h>
# include <__ranges/join_view.h>
# include <__ranges/lazy_split_view.h>
# include <__ranges/rbegin.h>
# include <__ranges/ref_view.h>
# include <__ranges/rend.h>
# include <__ranges/reverse_view.h>
# include <__ranges/single_view.h>
# include <__ranges/size.h>
# include <__ranges/split_view.h>
# include <__ranges/subrange.h>
# include <__ranges/take_view.h>
# include <__ranges/take_while_view.h>
# include <__ranges/transform_view.h>
# include <__ranges/view_interface.h>
# include <__ranges/views.h>
# if !defined(_LIBCPP_HAS_NO_LOCALIZATION)
# include <__ranges/istream_view.h>
# endif
#endif
#if _LIBCPP_STD_VER >= 23
# include <__ranges/as_rvalue_view.h>
# include <__ranges/chunk_by_view.h>
# include <__ranges/from_range.h>
# include <__ranges/repeat_view.h>
# include <__ranges/to.h>
# include <__ranges/zip_view.h>
#endif
#include <version>
// standard-mandated includes
// [ranges.syn]
#include <compare>
#include <initializer_list>
#include <iterator>
// [tuple.helper]
#include <__tuple/tuple_element.h>
#include <__tuple/tuple_size.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17
# include <cstddef>
# include <limits>
# include <optional>
# include <span>
# include <tuple>
#endif
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
# include <cstdlib>
# include <iosfwd>
# include <type_traits>
#endif
#endif // _LIBCPP_RANGES
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