[libc++] Add #if 0 block to all the top-level headers (#119234)

Including The frozen C++03 headers results in a lot of formatting
changes in the main headers, so this splits these changes into a
separate commit instead.

This is part of
https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc.

1 files changed, 226 insertions, 223 deletions

diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
index 14355d63f290..080fca8c1ca5 100644
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -1827,232 +1827,235 @@ template <class BidirectionalIterator, class Compare>
 
 */
 
-#include <__config>
-
-#include <__algorithm/adjacent_find.h>
-#include <__algorithm/all_of.h>
-#include <__algorithm/any_of.h>
-#include <__algorithm/binary_search.h>
-#include <__algorithm/copy.h>
-#include <__algorithm/copy_backward.h>
-#include <__algorithm/copy_if.h>
-#include <__algorithm/copy_n.h>
-#include <__algorithm/count.h>
-#include <__algorithm/count_if.h>
-#include <__algorithm/equal.h>
-#include <__algorithm/equal_range.h>
-#include <__algorithm/fill.h>
-#include <__algorithm/fill_n.h>
-#include <__algorithm/find.h>
-#include <__algorithm/find_end.h>
-#include <__algorithm/find_first_of.h>
-#include <__algorithm/find_if.h>
-#include <__algorithm/find_if_not.h>
-#include <__algorithm/for_each.h>
-#include <__algorithm/generate.h>
-#include <__algorithm/generate_n.h>
-#include <__algorithm/includes.h>
-#include <__algorithm/inplace_merge.h>
-#include <__algorithm/is_heap.h>
-#include <__algorithm/is_heap_until.h>
-#include <__algorithm/is_partitioned.h>
-#include <__algorithm/is_permutation.h>
-#include <__algorithm/is_sorted.h>
-#include <__algorithm/is_sorted_until.h>
-#include <__algorithm/iter_swap.h>
-#include <__algorithm/lexicographical_compare.h>
-#include <__algorithm/lower_bound.h>
-#include <__algorithm/make_heap.h>
-#include <__algorithm/max.h>
-#include <__algorithm/max_element.h>
-#include <__algorithm/merge.h>
-#include <__algorithm/min.h>
-#include <__algorithm/min_element.h>
-#include <__algorithm/minmax.h>
-#include <__algorithm/minmax_element.h>
-#include <__algorithm/mismatch.h>
-#include <__algorithm/move.h>
-#include <__algorithm/move_backward.h>
-#include <__algorithm/next_permutation.h>
-#include <__algorithm/none_of.h>
-#include <__algorithm/nth_element.h>
-#include <__algorithm/partial_sort.h>
-#include <__algorithm/partial_sort_copy.h>
-#include <__algorithm/partition.h>
-#include <__algorithm/partition_copy.h>
-#include <__algorithm/partition_point.h>
-#include <__algorithm/pop_heap.h>
-#include <__algorithm/prev_permutation.h>
-#include <__algorithm/push_heap.h>
-#include <__algorithm/remove.h>
-#include <__algorithm/remove_copy.h>
-#include <__algorithm/remove_copy_if.h>
-#include <__algorithm/remove_if.h>
-#include <__algorithm/replace.h>
-#include <__algorithm/replace_copy.h>
-#include <__algorithm/replace_copy_if.h>
-#include <__algorithm/replace_if.h>
-#include <__algorithm/reverse.h>
-#include <__algorithm/reverse_copy.h>
-#include <__algorithm/rotate.h>
-#include <__algorithm/rotate_copy.h>
-#include <__algorithm/search.h>
-#include <__algorithm/search_n.h>
-#include <__algorithm/set_difference.h>
-#include <__algorithm/set_intersection.h>
-#include <__algorithm/set_symmetric_difference.h>
-#include <__algorithm/set_union.h>
-#include <__algorithm/shuffle.h>
-#include <__algorithm/sort.h>
-#include <__algorithm/sort_heap.h>
-#include <__algorithm/stable_partition.h>
-#include <__algorithm/stable_sort.h>
-#include <__algorithm/swap_ranges.h>
-#include <__algorithm/transform.h>
-#include <__algorithm/unique.h>
-#include <__algorithm/unique_copy.h>
-#include <__algorithm/upper_bound.h>
-
-#if _LIBCPP_STD_VER >= 17
-#  include <__algorithm/clamp.h>
-#  include <__algorithm/for_each_n.h>
-#  include <__algorithm/pstl.h>
-#  include <__algorithm/sample.h>
-#endif // _LIBCPP_STD_VER >= 17
-
-#if _LIBCPP_STD_VER >= 20
-#  include <__algorithm/in_found_result.h>
-#  include <__algorithm/in_fun_result.h>
-#  include <__algorithm/in_in_out_result.h>
-#  include <__algorithm/in_in_result.h>
-#  include <__algorithm/in_out_out_result.h>
-#  include <__algorithm/in_out_result.h>
-#  include <__algorithm/lexicographical_compare_three_way.h>
-#  include <__algorithm/min_max_result.h>
-#  include <__algorithm/ranges_adjacent_find.h>
-#  include <__algorithm/ranges_all_of.h>
-#  include <__algorithm/ranges_any_of.h>
-#  include <__algorithm/ranges_binary_search.h>
-#  include <__algorithm/ranges_clamp.h>
-#  include <__algorithm/ranges_contains.h>
-#  include <__algorithm/ranges_copy.h>
-#  include <__algorithm/ranges_copy_backward.h>
-#  include <__algorithm/ranges_copy_if.h>
-#  include <__algorithm/ranges_copy_n.h>
-#  include <__algorithm/ranges_count.h>
-#  include <__algorithm/ranges_count_if.h>
-#  include <__algorithm/ranges_equal.h>
-#  include <__algorithm/ranges_equal_range.h>
-#  include <__algorithm/ranges_fill.h>
-#  include <__algorithm/ranges_fill_n.h>
-#  include <__algorithm/ranges_find.h>
-#  include <__algorithm/ranges_find_end.h>
-#  include <__algorithm/ranges_find_first_of.h>
-#  include <__algorithm/ranges_find_if.h>
-#  include <__algorithm/ranges_find_if_not.h>
-#  include <__algorithm/ranges_for_each.h>
-#  include <__algorithm/ranges_for_each_n.h>
-#  include <__algorithm/ranges_generate.h>
-#  include <__algorithm/ranges_generate_n.h>
-#  include <__algorithm/ranges_includes.h>
-#  include <__algorithm/ranges_inplace_merge.h>
-#  include <__algorithm/ranges_is_heap.h>
-#  include <__algorithm/ranges_is_heap_until.h>
-#  include <__algorithm/ranges_is_partitioned.h>
-#  include <__algorithm/ranges_is_permutation.h>
-#  include <__algorithm/ranges_is_sorted.h>
-#  include <__algorithm/ranges_is_sorted_until.h>
-#  include <__algorithm/ranges_lexicographical_compare.h>
-#  include <__algorithm/ranges_lower_bound.h>
-#  include <__algorithm/ranges_make_heap.h>
-#  include <__algorithm/ranges_max.h>
-#  include <__algorithm/ranges_max_element.h>
-#  include <__algorithm/ranges_merge.h>
-#  include <__algorithm/ranges_min.h>
-#  include <__algorithm/ranges_min_element.h>
-#  include <__algorithm/ranges_minmax.h>
-#  include <__algorithm/ranges_minmax_element.h>
-#  include <__algorithm/ranges_mismatch.h>
-#  include <__algorithm/ranges_move.h>
-#  include <__algorithm/ranges_move_backward.h>
-#  include <__algorithm/ranges_next_permutation.h>
-#  include <__algorithm/ranges_none_of.h>
-#  include <__algorithm/ranges_nth_element.h>
-#  include <__algorithm/ranges_partial_sort.h>
-#  include <__algorithm/ranges_partial_sort_copy.h>
-#  include <__algorithm/ranges_partition.h>
-#  include <__algorithm/ranges_partition_copy.h>
-#  include <__algorithm/ranges_partition_point.h>
-#  include <__algorithm/ranges_pop_heap.h>
-#  include <__algorithm/ranges_prev_permutation.h>
-#  include <__algorithm/ranges_push_heap.h>
-#  include <__algorithm/ranges_remove.h>
-#  include <__algorithm/ranges_remove_copy.h>
-#  include <__algorithm/ranges_remove_copy_if.h>
-#  include <__algorithm/ranges_remove_if.h>
-#  include <__algorithm/ranges_replace.h>
-#  include <__algorithm/ranges_replace_copy.h>
-#  include <__algorithm/ranges_replace_copy_if.h>
-#  include <__algorithm/ranges_replace_if.h>
-#  include <__algorithm/ranges_reverse.h>
-#  include <__algorithm/ranges_reverse_copy.h>
-#  include <__algorithm/ranges_rotate.h>
-#  include <__algorithm/ranges_rotate_copy.h>
-#  include <__algorithm/ranges_sample.h>
-#  include <__algorithm/ranges_search.h>
-#  include <__algorithm/ranges_search_n.h>
-#  include <__algorithm/ranges_set_difference.h>
-#  include <__algorithm/ranges_set_intersection.h>
-#  include <__algorithm/ranges_set_symmetric_difference.h>
-#  include <__algorithm/ranges_set_union.h>
-#  include <__algorithm/ranges_shuffle.h>
-#  include <__algorithm/ranges_sort.h>
-#  include <__algorithm/ranges_sort_heap.h>
-#  include <__algorithm/ranges_stable_partition.h>
-#  include <__algorithm/ranges_stable_sort.h>
-#  include <__algorithm/ranges_swap_ranges.h>
-#  include <__algorithm/ranges_transform.h>
-#  include <__algorithm/ranges_unique.h>
-#  include <__algorithm/ranges_unique_copy.h>
-#  include <__algorithm/ranges_upper_bound.h>
-#  include <__algorithm/shift_left.h>
-#  include <__algorithm/shift_right.h>
-#endif
-
-#if _LIBCPP_STD_VER >= 23
-#  include <__algorithm/ranges_contains_subrange.h>
-#  include <__algorithm/ranges_ends_with.h>
-#  include <__algorithm/ranges_find_last.h>
-#  include <__algorithm/ranges_fold.h>
-#  include <__algorithm/ranges_starts_with.h>
-#endif // _LIBCPP_STD_VER >= 23
-
-#include <version>
+#if 0
+#else // 0
+#  include <__config>
+
+#  include <__algorithm/adjacent_find.h>
+#  include <__algorithm/all_of.h>
+#  include <__algorithm/any_of.h>
+#  include <__algorithm/binary_search.h>
+#  include <__algorithm/copy.h>
+#  include <__algorithm/copy_backward.h>
+#  include <__algorithm/copy_if.h>
+#  include <__algorithm/copy_n.h>
+#  include <__algorithm/count.h>
+#  include <__algorithm/count_if.h>
+#  include <__algorithm/equal.h>
+#  include <__algorithm/equal_range.h>
+#  include <__algorithm/fill.h>
+#  include <__algorithm/fill_n.h>
+#  include <__algorithm/find.h>
+#  include <__algorithm/find_end.h>
+#  include <__algorithm/find_first_of.h>
+#  include <__algorithm/find_if.h>
+#  include <__algorithm/find_if_not.h>
+#  include <__algorithm/for_each.h>
+#  include <__algorithm/generate.h>
+#  include <__algorithm/generate_n.h>
+#  include <__algorithm/includes.h>
+#  include <__algorithm/inplace_merge.h>
+#  include <__algorithm/is_heap.h>
+#  include <__algorithm/is_heap_until.h>
+#  include <__algorithm/is_partitioned.h>
+#  include <__algorithm/is_permutation.h>
+#  include <__algorithm/is_sorted.h>
+#  include <__algorithm/is_sorted_until.h>
+#  include <__algorithm/iter_swap.h>
+#  include <__algorithm/lexicographical_compare.h>
+#  include <__algorithm/lower_bound.h>
+#  include <__algorithm/make_heap.h>
+#  include <__algorithm/max.h>
+#  include <__algorithm/max_element.h>
+#  include <__algorithm/merge.h>
+#  include <__algorithm/min.h>
+#  include <__algorithm/min_element.h>
+#  include <__algorithm/minmax.h>
+#  include <__algorithm/minmax_element.h>
+#  include <__algorithm/mismatch.h>
+#  include <__algorithm/move.h>
+#  include <__algorithm/move_backward.h>
+#  include <__algorithm/next_permutation.h>
+#  include <__algorithm/none_of.h>
+#  include <__algorithm/nth_element.h>
+#  include <__algorithm/partial_sort.h>
+#  include <__algorithm/partial_sort_copy.h>
+#  include <__algorithm/partition.h>
+#  include <__algorithm/partition_copy.h>
+#  include <__algorithm/partition_point.h>
+#  include <__algorithm/pop_heap.h>
+#  include <__algorithm/prev_permutation.h>
+#  include <__algorithm/push_heap.h>
+#  include <__algorithm/remove.h>
+#  include <__algorithm/remove_copy.h>
+#  include <__algorithm/remove_copy_if.h>
+#  include <__algorithm/remove_if.h>
+#  include <__algorithm/replace.h>
+#  include <__algorithm/replace_copy.h>
+#  include <__algorithm/replace_copy_if.h>
+#  include <__algorithm/replace_if.h>
+#  include <__algorithm/reverse.h>
+#  include <__algorithm/reverse_copy.h>
+#  include <__algorithm/rotate.h>
+#  include <__algorithm/rotate_copy.h>
+#  include <__algorithm/search.h>
+#  include <__algorithm/search_n.h>
+#  include <__algorithm/set_difference.h>
+#  include <__algorithm/set_intersection.h>
+#  include <__algorithm/set_symmetric_difference.h>
+#  include <__algorithm/set_union.h>
+#  include <__algorithm/shuffle.h>
+#  include <__algorithm/sort.h>
+#  include <__algorithm/sort_heap.h>
+#  include <__algorithm/stable_partition.h>
+#  include <__algorithm/stable_sort.h>
+#  include <__algorithm/swap_ranges.h>
+#  include <__algorithm/transform.h>
+#  include <__algorithm/unique.h>
+#  include <__algorithm/unique_copy.h>
+#  include <__algorithm/upper_bound.h>
+
+#  if _LIBCPP_STD_VER >= 17
+#    include <__algorithm/clamp.h>
+#    include <__algorithm/for_each_n.h>
+#    include <__algorithm/pstl.h>
+#    include <__algorithm/sample.h>
+#  endif // _LIBCPP_STD_VER >= 17
+
+#  if _LIBCPP_STD_VER >= 20
+#    include <__algorithm/in_found_result.h>
+#    include <__algorithm/in_fun_result.h>
+#    include <__algorithm/in_in_out_result.h>
+#    include <__algorithm/in_in_result.h>
+#    include <__algorithm/in_out_out_result.h>
+#    include <__algorithm/in_out_result.h>
+#    include <__algorithm/lexicographical_compare_three_way.h>
+#    include <__algorithm/min_max_result.h>
+#    include <__algorithm/ranges_adjacent_find.h>
+#    include <__algorithm/ranges_all_of.h>
+#    include <__algorithm/ranges_any_of.h>
+#    include <__algorithm/ranges_binary_search.h>
+#    include <__algorithm/ranges_clamp.h>
+#    include <__algorithm/ranges_contains.h>
+#    include <__algorithm/ranges_copy.h>
+#    include <__algorithm/ranges_copy_backward.h>
+#    include <__algorithm/ranges_copy_if.h>
+#    include <__algorithm/ranges_copy_n.h>
+#    include <__algorithm/ranges_count.h>
+#    include <__algorithm/ranges_count_if.h>
+#    include <__algorithm/ranges_equal.h>
+#    include <__algorithm/ranges_equal_range.h>
+#    include <__algorithm/ranges_fill.h>
+#    include <__algorithm/ranges_fill_n.h>
+#    include <__algorithm/ranges_find.h>
+#    include <__algorithm/ranges_find_end.h>
+#    include <__algorithm/ranges_find_first_of.h>
+#    include <__algorithm/ranges_find_if.h>
+#    include <__algorithm/ranges_find_if_not.h>
+#    include <__algorithm/ranges_for_each.h>
+#    include <__algorithm/ranges_for_each_n.h>
+#    include <__algorithm/ranges_generate.h>
+#    include <__algorithm/ranges_generate_n.h>
+#    include <__algorithm/ranges_includes.h>
+#    include <__algorithm/ranges_inplace_merge.h>
+#    include <__algorithm/ranges_is_heap.h>
+#    include <__algorithm/ranges_is_heap_until.h>
+#    include <__algorithm/ranges_is_partitioned.h>
+#    include <__algorithm/ranges_is_permutation.h>
+#    include <__algorithm/ranges_is_sorted.h>
+#    include <__algorithm/ranges_is_sorted_until.h>
+#    include <__algorithm/ranges_lexicographical_compare.h>
+#    include <__algorithm/ranges_lower_bound.h>
+#    include <__algorithm/ranges_make_heap.h>
+#    include <__algorithm/ranges_max.h>
+#    include <__algorithm/ranges_max_element.h>
+#    include <__algorithm/ranges_merge.h>
+#    include <__algorithm/ranges_min.h>
+#    include <__algorithm/ranges_min_element.h>
+#    include <__algorithm/ranges_minmax.h>
+#    include <__algorithm/ranges_minmax_element.h>
+#    include <__algorithm/ranges_mismatch.h>
+#    include <__algorithm/ranges_move.h>
+#    include <__algorithm/ranges_move_backward.h>
+#    include <__algorithm/ranges_next_permutation.h>
+#    include <__algorithm/ranges_none_of.h>
+#    include <__algorithm/ranges_nth_element.h>
+#    include <__algorithm/ranges_partial_sort.h>
+#    include <__algorithm/ranges_partial_sort_copy.h>
+#    include <__algorithm/ranges_partition.h>
+#    include <__algorithm/ranges_partition_copy.h>
+#    include <__algorithm/ranges_partition_point.h>
+#    include <__algorithm/ranges_pop_heap.h>
+#    include <__algorithm/ranges_prev_permutation.h>
+#    include <__algorithm/ranges_push_heap.h>
+#    include <__algorithm/ranges_remove.h>
+#    include <__algorithm/ranges_remove_copy.h>
+#    include <__algorithm/ranges_remove_copy_if.h>
+#    include <__algorithm/ranges_remove_if.h>
+#    include <__algorithm/ranges_replace.h>
+#    include <__algorithm/ranges_replace_copy.h>
+#    include <__algorithm/ranges_replace_copy_if.h>
+#    include <__algorithm/ranges_replace_if.h>
+#    include <__algorithm/ranges_reverse.h>
+#    include <__algorithm/ranges_reverse_copy.h>
+#    include <__algorithm/ranges_rotate.h>
+#    include <__algorithm/ranges_rotate_copy.h>
+#    include <__algorithm/ranges_sample.h>
+#    include <__algorithm/ranges_search.h>
+#    include <__algorithm/ranges_search_n.h>
+#    include <__algorithm/ranges_set_difference.h>
+#    include <__algorithm/ranges_set_intersection.h>
+#    include <__algorithm/ranges_set_symmetric_difference.h>
+#    include <__algorithm/ranges_set_union.h>
+#    include <__algorithm/ranges_shuffle.h>
+#    include <__algorithm/ranges_sort.h>
+#    include <__algorithm/ranges_sort_heap.h>
+#    include <__algorithm/ranges_stable_partition.h>
+#    include <__algorithm/ranges_stable_sort.h>
+#    include <__algorithm/ranges_swap_ranges.h>
+#    include <__algorithm/ranges_transform.h>
+#    include <__algorithm/ranges_unique.h>
+#    include <__algorithm/ranges_unique_copy.h>
+#    include <__algorithm/ranges_upper_bound.h>
+#    include <__algorithm/shift_left.h>
+#    include <__algorithm/shift_right.h>
+#  endif
+
+#  if _LIBCPP_STD_VER >= 23
+#    include <__algorithm/ranges_contains_subrange.h>
+#    include <__algorithm/ranges_ends_with.h>
+#    include <__algorithm/ranges_find_last.h>
+#    include <__algorithm/ranges_fold.h>
+#    include <__algorithm/ranges_starts_with.h>
+#  endif // _LIBCPP_STD_VER >= 23
+
+#  include <version>
 
 // standard-mandated includes
 
 // [algorithm.syn]
-#include <initializer_list>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
-
-#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER == 14
-#  include <execution>
-#endif
-
-#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
-#  include <atomic>
-#  include <bit>
-#  include <concepts>
-#  include <cstdlib>
-#  include <cstring>
-#  include <iterator>
-#  include <memory>
-#  include <stdexcept>
-#  include <type_traits>
-#  include <utility>
-#endif
+#  include <initializer_list>
+
+#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#    pragma GCC system_header
+#  endif
+
+#  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER == 14
+#    include <execution>
+#  endif
+
+#  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
+#    include <atomic>
+#    include <bit>
+#    include <concepts>
+#    include <cstdlib>
+#    include <cstring>
+#    include <iterator>
+#    include <memory>
+#    include <stdexcept>
+#    include <type_traits>
+#    include <utility>
+#  endif
+#endif // 0
 
 #endif // _LIBCPP_ALGORITHM