Upgrade to 2022-era LLVM LIBCXX

2025-06-02 10:42:27 +00:00 · 2024-05-27 02:12:27 -07:00 · 2024-05-27 02:12:27 -07:00 · 8e68384e15
commit 8e68384e15
parent 2f4ca71f26
2078 changed files with 165657 additions and 65010 deletions
--- a/third_party/libcxx/__algorithm/unique_copy.h
+++ b/third_party/libcxx/__algorithm/unique_copy.h
@ -0,0 +1,122 @@
+//===----------------------------------------------------------------------===//
+//
+// 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___ALGORITHM_UNIQUE_COPY_H
+#define _LIBCPP___ALGORITHM_UNIQUE_COPY_H
+
+#include <__algorithm/comp.h>
+#include <__algorithm/iterator_operations.h>
+#include <__config>
+#include <__iterator/iterator_traits.h>
+#include <__type_traits/conditional.h>
+#include <__type_traits/is_base_of.h>
+#include <__type_traits/is_same.h>
+#include <__utility/move.h>
+#include <__utility/pair.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace __unique_copy_tags {
+
+struct __reread_from_input_tag {};
+struct __reread_from_output_tag {};
+struct __read_from_tmp_value_tag {};
+
+} // namespace __unique_copy_tags
+
+template <class _AlgPolicy, class _BinaryPredicate, class _InputIterator, class _Sent, class _OutputIterator>
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _OutputIterator>
+__unique_copy(_InputIterator __first,
+              _Sent __last,
+              _OutputIterator __result,
+              _BinaryPredicate&& __pred,
+              __unique_copy_tags::__read_from_tmp_value_tag) {
+  if (__first != __last) {
+    typename _IterOps<_AlgPolicy>::template __value_type<_InputIterator> __t(*__first);
+    *__result = __t;
+    ++__result;
+    while (++__first != __last) {
+      if (!__pred(__t, *__first)) {
+        __t       = *__first;
+        *__result = __t;
+        ++__result;
+      }
+    }
+  }
+  return pair<_InputIterator, _OutputIterator>(std::move(__first), std::move(__result));
+}
+
+template <class _AlgPolicy, class _BinaryPredicate, class _ForwardIterator, class _Sent, class _OutputIterator>
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pair<_ForwardIterator, _OutputIterator>
+__unique_copy(_ForwardIterator __first,
+              _Sent __last,
+              _OutputIterator __result,
+              _BinaryPredicate&& __pred,
+              __unique_copy_tags::__reread_from_input_tag) {
+  if (__first != __last) {
+    _ForwardIterator __i = __first;
+    *__result            = *__i;
+    ++__result;
+    while (++__first != __last) {
+      if (!__pred(*__i, *__first)) {
+        *__result = *__first;
+        ++__result;
+        __i = __first;
+      }
+    }
+  }
+  return pair<_ForwardIterator, _OutputIterator>(std::move(__first), std::move(__result));
+}
+
+template <class _AlgPolicy, class _BinaryPredicate, class _InputIterator, class _Sent, class _InputAndOutputIterator>
+_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _InputAndOutputIterator>
+__unique_copy(_InputIterator __first,
+              _Sent __last,
+              _InputAndOutputIterator __result,
+              _BinaryPredicate&& __pred,
+              __unique_copy_tags::__reread_from_output_tag) {
+  if (__first != __last) {
+    *__result = *__first;
+    while (++__first != __last)
+      if (!__pred(*__result, *__first))
+        *++__result = *__first;
+    ++__result;
+  }
+  return pair<_InputIterator, _InputAndOutputIterator>(std::move(__first), std::move(__result));
+}
+
+template <class _InputIterator, class _OutputIterator, class _BinaryPredicate>
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
+unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) {
+  using __algo_tag = __conditional_t<
+      is_base_of<forward_iterator_tag, typename iterator_traits<_InputIterator>::iterator_category>::value,
+      __unique_copy_tags::__reread_from_input_tag,
+      __conditional_t<
+          is_base_of<forward_iterator_tag, typename iterator_traits<_OutputIterator>::iterator_category>::value &&
+              is_same< typename iterator_traits<_InputIterator>::value_type,
+                       typename iterator_traits<_OutputIterator>::value_type>::value,
+          __unique_copy_tags::__reread_from_output_tag,
+          __unique_copy_tags::__read_from_tmp_value_tag> >;
+  return std::__unique_copy<_ClassicAlgPolicy>(
+             std::move(__first), std::move(__last), std::move(__result), __pred, __algo_tag())
+      .second;
+}
+
+template <class _InputIterator, class _OutputIterator>
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
+unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) {
+  return std::unique_copy(std::move(__first), std::move(__last), std::move(__result), __equal_to());
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___ALGORITHM_UNIQUE_COPY_H