e78f53d1e8
This reverts commit 68c04b0ae62d8431d72d8b47fc13008002ee4387. This disables the IWYU mapping that caused the failure, since the headers aren't reachable for now. This is the first part of the "Freezing C++03 headers" proposal explained in https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319/58. This patch mechanically copies the headers as of the LLVM 19.1 release into a subdirectory of libc++ so that we can start using these headers when building in C++03 mode. We are going to be backporting important changes to that copy of the headers until the LLVM 21 release. After the LLVM 21 release, only critical bugfixes will be fixed in the C++03 copy of the headers. This patch only performs a copy of the headers -- these headers are still unused by the rest of the codebase.
179 lines
7.3 KiB
C++
179 lines
7.3 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_COMPARE
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#define _LIBCPP_COMPARE
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/*
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compare synopsis
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namespace std {
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// [cmp.categories], comparison category types
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class partial_ordering;
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class weak_ordering;
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class strong_ordering;
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// named comparison functions
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constexpr bool is_eq (partial_ordering cmp) noexcept { return cmp == 0; }
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constexpr bool is_neq (partial_ordering cmp) noexcept { return cmp != 0; }
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constexpr bool is_lt (partial_ordering cmp) noexcept { return cmp < 0; }
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constexpr bool is_lteq(partial_ordering cmp) noexcept { return cmp <= 0; }
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constexpr bool is_gt (partial_ordering cmp) noexcept { return cmp > 0; }
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constexpr bool is_gteq(partial_ordering cmp) noexcept { return cmp >= 0; }
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// [cmp.common], common comparison category type
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template<class... Ts>
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struct common_comparison_category {
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using type = see below;
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};
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template<class... Ts>
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using common_comparison_category_t = typename common_comparison_category<Ts...>::type;
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// [cmp.concept], concept three_way_comparable
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template<class T, class Cat = partial_ordering>
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concept three_way_comparable = see below;
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template<class T, class U, class Cat = partial_ordering>
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concept three_way_comparable_with = see below;
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// [cmp.result], result of three-way comparison
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template<class T, class U = T> struct compare_three_way_result;
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template<class T, class U = T>
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using compare_three_way_result_t = typename compare_three_way_result<T, U>::type;
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// [comparisons.three.way], class compare_three_way
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struct compare_three_way; // C++20
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// [cmp.alg], comparison algorithms
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inline namespace unspecified {
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inline constexpr unspecified strong_order = unspecified;
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inline constexpr unspecified weak_order = unspecified;
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inline constexpr unspecified partial_order = unspecified;
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inline constexpr unspecified compare_strong_order_fallback = unspecified;
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inline constexpr unspecified compare_weak_order_fallback = unspecified;
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inline constexpr unspecified compare_partial_order_fallback = unspecified;
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}
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// [cmp.partialord], Class partial_ordering
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class partial_ordering {
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public:
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// valid values
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static const partial_ordering less;
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static const partial_ordering equivalent;
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static const partial_ordering greater;
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static const partial_ordering unordered;
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// comparisons
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friend constexpr bool operator==(partial_ordering v, unspecified) noexcept;
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friend constexpr bool operator==(partial_ordering v, partial_ordering w) noexcept = default;
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friend constexpr bool operator< (partial_ordering v, unspecified) noexcept;
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friend constexpr bool operator> (partial_ordering v, unspecified) noexcept;
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friend constexpr bool operator<=(partial_ordering v, unspecified) noexcept;
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friend constexpr bool operator>=(partial_ordering v, unspecified) noexcept;
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friend constexpr bool operator< (unspecified, partial_ordering v) noexcept;
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friend constexpr bool operator> (unspecified, partial_ordering v) noexcept;
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friend constexpr bool operator<=(unspecified, partial_ordering v) noexcept;
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friend constexpr bool operator>=(unspecified, partial_ordering v) noexcept;
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friend constexpr partial_ordering operator<=>(partial_ordering v, unspecified) noexcept;
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friend constexpr partial_ordering operator<=>(unspecified, partial_ordering v) noexcept;
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};
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// [cmp.weakord], Class weak_ordering
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class weak_ordering {
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public:
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// valid values
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static const weak_ordering less;
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static const weak_ordering equivalent;
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static const weak_ordering greater;
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// conversions
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constexpr operator partial_ordering() const noexcept;
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// comparisons
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friend constexpr bool operator==(weak_ordering v, unspecified) noexcept;
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friend constexpr bool operator==(weak_ordering v, weak_ordering w) noexcept = default;
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friend constexpr bool operator< (weak_ordering v, unspecified) noexcept;
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friend constexpr bool operator> (weak_ordering v, unspecified) noexcept;
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friend constexpr bool operator<=(weak_ordering v, unspecified) noexcept;
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friend constexpr bool operator>=(weak_ordering v, unspecified) noexcept;
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friend constexpr bool operator< (unspecified, weak_ordering v) noexcept;
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friend constexpr bool operator> (unspecified, weak_ordering v) noexcept;
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friend constexpr bool operator<=(unspecified, weak_ordering v) noexcept;
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friend constexpr bool operator>=(unspecified, weak_ordering v) noexcept;
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friend constexpr weak_ordering operator<=>(weak_ordering v, unspecified) noexcept;
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friend constexpr weak_ordering operator<=>(unspecified, weak_ordering v) noexcept;
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};
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// [cmp.strongord], Class strong_ordering
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class strong_ordering {
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public:
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// valid values
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static const strong_ordering less;
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static const strong_ordering equal;
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static const strong_ordering equivalent;
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static const strong_ordering greater;
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// conversions
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constexpr operator partial_ordering() const noexcept;
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constexpr operator weak_ordering() const noexcept;
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// comparisons
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friend constexpr bool operator==(strong_ordering v, unspecified) noexcept;
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friend constexpr bool operator==(strong_ordering v, strong_ordering w) noexcept = default;
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friend constexpr bool operator< (strong_ordering v, unspecified) noexcept;
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friend constexpr bool operator> (strong_ordering v, unspecified) noexcept;
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friend constexpr bool operator<=(strong_ordering v, unspecified) noexcept;
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friend constexpr bool operator>=(strong_ordering v, unspecified) noexcept;
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friend constexpr bool operator< (unspecified, strong_ordering v) noexcept;
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friend constexpr bool operator> (unspecified, strong_ordering v) noexcept;
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friend constexpr bool operator<=(unspecified, strong_ordering v) noexcept;
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friend constexpr bool operator>=(unspecified, strong_ordering v) noexcept;
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friend constexpr strong_ordering operator<=>(strong_ordering v, unspecified) noexcept;
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friend constexpr strong_ordering operator<=>(unspecified, strong_ordering v) noexcept;
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};
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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 <__compare/common_comparison_category.h>
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# include <__compare/compare_partial_order_fallback.h>
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# include <__compare/compare_strong_order_fallback.h>
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# include <__compare/compare_three_way.h>
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# include <__compare/compare_three_way_result.h>
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# include <__compare/compare_weak_order_fallback.h>
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# include <__compare/is_eq.h>
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# include <__compare/ordering.h>
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# include <__compare/partial_order.h>
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# include <__compare/strong_order.h>
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# include <__compare/synth_three_way.h>
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# include <__compare/three_way_comparable.h>
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# include <__compare/weak_order.h>
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#endif // _LIBCPP_STD_VER >= 20
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#include <version>
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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 <cstdint>
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# include <limits>
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#endif
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#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
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# include <cmath>
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# include <type_traits>
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#endif
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#endif // _LIBCPP_COMPARE
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