mirror of
https://github.com/jart/cosmopolitan.git
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463 lines
14 KiB
C++
463 lines
14 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_RANGES
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#define _LIBCPP_RANGES
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/*
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#include <compare> // see [compare.syn]
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#include <initializer_list> // see [initializer.list.syn]
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#include <iterator> // see [iterator.synopsis]
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namespace std::ranges {
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inline namespace unspecified {
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// [range.access], range access
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inline constexpr unspecified begin = unspecified;
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inline constexpr unspecified end = unspecified;
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inline constexpr unspecified cbegin = unspecified;
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inline constexpr unspecified cend = unspecified;
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inline constexpr unspecified size = unspecified;
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inline constexpr unspecified ssize = unspecified;
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}
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// [range.range], ranges
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template<class T>
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concept range = see below;
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template<class T>
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inline constexpr bool enable_borrowed_range = false;
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template<class T>
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using iterator_t = decltype(ranges::begin(declval<T&>()));
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template<range R>
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using sentinel_t = decltype(ranges::end(declval<R&>()));
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template<range R>
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using range_difference_t = iter_difference_t<iterator_t<R>>;
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template<sized_range R>
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using range_size_t = decltype(ranges::size(declval<R&>()));
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template<range R>
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using range_value_t = iter_value_t<iterator_t<R>>;
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template<range R>
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using range_reference_t = iter_reference_t<iterator_t<R>>;
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template<range R>
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using range_rvalue_reference_t = iter_rvalue_reference_t<iterator_t<R>>;
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template <range R>
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using range_common_reference_t = iter_common_reference_t<iterator_t<R>>;
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// [range.sized], sized ranges
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template<class>
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inline constexpr bool disable_sized_range = false;
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template<class T>
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concept sized_range = ...;
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// [range.view], views
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template<class T>
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inline constexpr bool enable_view = ...;
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struct view_base { };
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template<class T>
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concept view = ...;
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// [range.refinements], other range refinements
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template<class R, class T>
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concept output_range = see below;
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template<class T>
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concept input_range = see below;
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template<class T>
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concept forward_range = see below;
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template<class T>
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concept bidirectional_range = see below;
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template<class T>
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concept random_access_range = see below;
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template<class T>
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concept contiguous_range = see below;
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template <class _Tp>
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concept common_range = see below;
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template<class T>
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concept viewable_range = see below;
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// [range.adaptor.object], range adaptor objects
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template<class D>
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requires is_class_v<D> && same_as<D, remove_cv_t<D>>
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class range_adaptor_closure { }; // Since c++23
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// [view.interface], class template view_interface
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template<class D>
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requires is_class_v<D> && same_as<D, remove_cv_t<D>>
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class view_interface;
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// [range.subrange], sub-ranges
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enum class subrange_kind : bool { unsized, sized };
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template<input_or_output_iterator I, sentinel_for<I> S = I, subrange_kind K = see below>
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requires (K == subrange_kind::sized || !sized_sentinel_for<S, I>)
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class subrange;
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template<class I, class S, subrange_kind K>
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inline constexpr bool enable_borrowed_range<subrange<I, S, K>> = true;
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// [range.dangling], dangling iterator handling
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struct dangling;
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template<range R>
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using borrowed_iterator_t = see below;
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template<range R>
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using borrowed_subrange_t = see below;
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// [range.elements], elements view
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template<input_range V, size_t N>
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requires see below
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class elements_view;
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template<class T, size_t N>
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inline constexpr bool enable_borrowed_range<elements_view<T, N>> =
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enable_borrowed_range<T>;
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template<class R>
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using keys_view = elements_view<R, 0>;
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template<class R>
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using values_view = elements_view<R, 1>;
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namespace views {
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template<size_t N>
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inline constexpr unspecified elements = unspecified;
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inline constexpr auto keys = elements<0>;
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inline constexpr auto values = elements<1>;
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}
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// [range.utility.conv], range conversions
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template<class C, input_range R, class... Args> requires (!view<C>)
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constexpr C to(R&& r, Args&&... args); // Since C++23
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template<template<class...> class C, input_range R, class... Args>
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constexpr auto to(R&& r, Args&&... args); // Since C++23
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template<class C, class... Args> requires (!view<C>)
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constexpr auto to(Args&&... args); // Since C++23
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template<template<class...> class C, class... Args>
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constexpr auto to(Args&&... args); // Since C++23
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// [range.empty], empty view
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template<class T>
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requires is_object_v<T>
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class empty_view;
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template<class T>
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inline constexpr bool enable_borrowed_range<empty_view<T>> = true;
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namespace views {
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template<class T>
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inline constexpr empty_view<T> empty{};
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}
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// [range.all], all view
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namespace views {
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inline constexpr unspecified all = unspecified;
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template<viewable_range R>
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using all_t = decltype(all(declval<R>()));
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}
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template<range R>
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requires is_object_v<R>
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class ref_view;
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template<class T>
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inline constexpr bool enable_borrowed_range<ref_view<T>> = true;
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template<range R>
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requires see below
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class owning_view;
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template<class T>
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inline constexpr bool enable_borrowed_range<owning_view<T>> = enable_borrowed_range<T>;
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// [range.filter], filter view
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template<input_range V, indirect_unary_predicate<iterator_t<V>> Pred>
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requires view<V> && is_object_v<Pred>
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class filter_view;
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namespace views {
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inline constexpr unspecified filter = unspecified;
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}
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// [range.drop], drop view
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template<view V>
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class drop_view;
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template<class T>
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inline constexpr bool enable_borrowed_range<drop_view<T>> = enable_borrowed_range<T>;
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// [range.drop.while], drop while view
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template<view V, class Pred>
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requires input_range<V> && is_object_v<Pred> &&
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indirect_unary_predicate<const Pred, iterator_t<V>>
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class drop_while_view;
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template<class T, class Pred>
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inline constexpr bool enable_borrowed_range<drop_while_view<T, Pred>> =
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enable_borrowed_range<T>;
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namespace views { inline constexpr unspecified drop_while = unspecified; }
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// [range.transform], transform view
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template<input_range V, copy_constructible F>
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requires view<V> && is_object_v<F> &&
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regular_invocable<F&, range_reference_t<V>> &&
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can-reference<invoke_result_t<F&, range_reference_t<V>>>
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class transform_view;
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// [range.counted], counted view
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namespace views { inline constexpr unspecified counted = unspecified; }
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// [range.common], common view
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template<view V>
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requires (!common_range<V> && copyable<iterator_t<V>>)
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class common_view;
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// [range.reverse], reverse view
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template<view V>
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requires bidirectional_range<V>
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class reverse_view;
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template<class T>
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inline constexpr bool enable_borrowed_range<reverse_view<T>> = enable_borrowed_range<T>;
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template<class T>
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inline constexpr bool enable_borrowed_range<common_view<T>> = enable_borrowed_range<T>;
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// [range.take], take view
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template<view> class take_view;
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template<class T>
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inline constexpr bool enable_borrowed_range<take_view<T>> = enable_borrowed_range<T>;
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// [range.take.while], take while view
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template<view V, class Pred>
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requires input_range<V> && is_object_v<Pred> &&
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indirect_unary_predicate<const Pred, iterator_t<V>>
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class take_while_view;
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namespace views { inline constexpr unspecified take_while = unspecified; }
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template<copy_constructible T>
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requires is_object_v<T>
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class single_view;
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template<weakly_incrementable W, semiregular Bound = unreachable_sentinel_t>
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requires weakly-equality-comparable-with<W, Bound> && copyable<W>
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class iota_view;
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template<class W, class Bound>
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inline constexpr bool enable_borrowed_range<iota_view<W, Bound>> = true;
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// [range.repeat], repeat view
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template<class T>
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concept integer-like-with-usable-difference-type = // exposition only
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is-signed-integer-like<T> || (is-integer-like<T> && weakly_incrementable<T>);
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template<move_constructible T, semiregular Bound = unreachable_sentinel_t>
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requires (is_object_v<T> && same_as<T, remove_cv_t<T>> &&
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(integer-like-with-usable-difference-type<Bound> ||
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same_as<Bound, unreachable_sentinel_t>))
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class repeat_view;
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namespace views { inline constexpr unspecified repeat = unspecified; }
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// [range.join], join view
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template<input_range V>
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requires view<V> && input_range<range_reference_t<V>>
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class join_view;
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// [range.lazy.split], lazy split view
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template<class R>
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concept tiny-range = see below; // exposition only
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template<input_range V, forward_range Pattern>
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requires view<V> && view<Pattern> &&
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indirectly_comparable<iterator_t<V>, iterator_t<Pattern>, ranges::equal_to> &&
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(forward_range<V> || tiny-range<Pattern>)
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class lazy_split_view;
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// [range.split], split view
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template<forward_range V, forward_range Pattern>
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requires view<V> && view<Pattern> &&
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indirectly_comparable<iterator_t<V>, iterator_t<Pattern>, ranges::equal_to>
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class split_view;
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namespace views {
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inline constexpr unspecified lazy_split = unspecified;
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inline constexpr unspecified split = unspecified;
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}
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// [range.istream], istream view
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template<movable Val, class CharT, class Traits = char_traits<CharT>>
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requires see below
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class basic_istream_view;
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template<class Val>
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using istream_view = basic_istream_view<Val, char>;
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template<class Val>
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using wistream_view = basic_istream_view<Val, wchar_t>;
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namespace views { template<class T> inline constexpr unspecified istream = unspecified; }
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// [range.zip], zip view
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template<input_range... Views>
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requires (view<Views> && ...) && (sizeof...(Views) > 0)
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class zip_view; // C++23
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template<class... Views>
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inline constexpr bool enable_borrowed_range<zip_view<Views...>> = // C++23
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(enable_borrowed_range<Views> && ...);
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namespace views { inline constexpr unspecified zip = unspecified; } // C++23
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// [range.as.rvalue]
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template <view V>
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requires input_range<V>
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class as_rvalue_view; // C++23
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namespace views { inline constexpr unspecified as_rvalue ) unspecified; } // C++23
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[range.chunk.by]
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template<forward_range V, indirect_binary_predicate<iterator_t<V>, iterator_t<V>> Pred>
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requires view<V> && is_object_v<Pred>
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class chunk_by_view; // C++23
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namespace views { inline constexpr unspecified chunk_by = unspecified; } // C++23
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}
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namespace std {
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namespace views = ranges::views;
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template<class T> struct tuple_size;
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template<size_t I, class T> struct tuple_element;
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template<class I, class S, ranges::subrange_kind K>
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struct tuple_size<ranges::subrange<I, S, K>>
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: integral_constant<size_t, 2> {};
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template<class I, class S, ranges::subrange_kind K>
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struct tuple_element<0, ranges::subrange<I, S, K>> {
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using type = I;
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};
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template<class I, class S, ranges::subrange_kind K>
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struct tuple_element<1, ranges::subrange<I, S, K>> {
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using type = S;
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};
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template<class I, class S, ranges::subrange_kind K>
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struct tuple_element<0, const ranges::subrange<I, S, K>> {
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using type = I;
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};
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template<class I, class S, ranges::subrange_kind K>
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struct tuple_element<1, const ranges::subrange<I, S, K>> {
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using type = S;
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};
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struct from_range_t { explicit from_range_t() = default; }; // Since C++23
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inline constexpr from_range_t from_range{}; // Since C++23
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}
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*/
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#include <__config>
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#if _LIBCPP_STD_VER >= 20
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# include <__ranges/access.h>
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# include <__ranges/all.h>
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# include <__ranges/common_view.h>
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# include <__ranges/concepts.h>
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# include <__ranges/counted.h>
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# include <__ranges/dangling.h>
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# include <__ranges/data.h>
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# include <__ranges/drop_view.h>
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# include <__ranges/drop_while_view.h>
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# include <__ranges/elements_view.h>
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# include <__ranges/empty.h>
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# include <__ranges/empty_view.h>
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# include <__ranges/enable_borrowed_range.h>
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# include <__ranges/enable_view.h>
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# include <__ranges/filter_view.h>
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# include <__ranges/iota_view.h>
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# include <__ranges/join_view.h>
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# include <__ranges/lazy_split_view.h>
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# include <__ranges/rbegin.h>
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# include <__ranges/ref_view.h>
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# include <__ranges/rend.h>
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# include <__ranges/reverse_view.h>
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# include <__ranges/single_view.h>
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# include <__ranges/size.h>
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# include <__ranges/split_view.h>
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# include <__ranges/subrange.h>
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# include <__ranges/take_view.h>
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# include <__ranges/take_while_view.h>
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# include <__ranges/transform_view.h>
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# include <__ranges/view_interface.h>
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# include <__ranges/views.h>
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# if !defined(_LIBCPP_HAS_NO_LOCALIZATION)
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# include <__ranges/istream_view.h>
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# endif
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#endif
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#if _LIBCPP_STD_VER >= 23
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# include <__ranges/as_rvalue_view.h>
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# include <__ranges/chunk_by_view.h>
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# include <__ranges/from_range.h>
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# include <__ranges/repeat_view.h>
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# include <__ranges/to.h>
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# include <__ranges/zip_view.h>
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#endif
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#include <version>
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// standard-mandated includes
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// [ranges.syn]
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#include <compare>
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#include <initializer_list>
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#include <iterator>
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// [tuple.helper]
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#include <__tuple/tuple_element.h>
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#include <__tuple/tuple_size.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17
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# include <cstddef>
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# include <limits>
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# include <optional>
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# include <span>
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# include <tuple>
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#endif
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#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
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# include <cstdlib>
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# include <iosfwd>
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# include <type_traits>
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#endif
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#endif // _LIBCPP_RANGES
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