// -*- 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_FILESYSTEM
#define _LIBCPP_FILESYSTEM

/*
    filesystem synopsis

    namespace std::filesystem {

    class path;

    void swap(path& lhs, path& rhs) noexcept;
    size_t hash_value(const path& p) noexcept;

    bool operator==(const path& lhs, const path& rhs) noexcept;
    bool operator!=(const path& lhs, const path& rhs) noexcept;
    bool operator< (const path& lhs, const path& rhs) noexcept;
    bool operator<=(const path& lhs, const path& rhs) noexcept;
    bool operator> (const path& lhs, const path& rhs) noexcept;
    bool operator>=(const path& lhs, const path& rhs) noexcept;

    path operator/ (const path& lhs, const path& rhs);

    // fs.path.io operators are friends of path.
    template <class charT, class traits>
    friend basic_ostream<charT, traits>&
    operator<<(basic_ostream<charT, traits>& os, const path& p);

    template <class charT, class traits>
    friend basic_istream<charT, traits>&
    operator>>(basic_istream<charT, traits>& is, path& p);

    template <class Source>
      path u8path(const Source& source);
    template <class InputIterator>
      path u8path(InputIterator first, InputIterator last);

    class filesystem_error;
    class directory_entry;

    class directory_iterator;

    // enable directory_iterator range-based for statements
    directory_iterator begin(directory_iterator iter) noexcept;
    directory_iterator end(directory_iterator) noexcept;

    class recursive_directory_iterator;

    // enable recursive_directory_iterator range-based for statements
    recursive_directory_iterator begin(recursive_directory_iterator iter) noexcept;
    recursive_directory_iterator end(recursive_directory_iterator) noexcept;

    class file_status;

    struct space_info
    {
      uintmax_t capacity;
      uintmax_t free;
      uintmax_t available;
    };

    enum class file_type;
    enum class perms;
    enum class perm_options;
    enum class copy_options;
    enum class directory_options;

    typedef chrono::time_point<trivial-clock>  file_time_type;

    // operational functions

    path absolute(const path& p);
    path absolute(const path& p, error_code &ec);

    path canonical(const path& p);
    path canonical(const path& p, error_code& ec);

    void copy(const path& from, const path& to);
    void copy(const path& from, const path& to, error_code& ec);
    void copy(const path& from, const path& to, copy_options options);
    void copy(const path& from, const path& to, copy_options options,
                   error_code& ec);

    bool copy_file(const path& from, const path& to);
    bool copy_file(const path& from, const path& to, error_code& ec);
    bool copy_file(const path& from, const path& to, copy_options option);
    bool copy_file(const path& from, const path& to, copy_options option,
                           error_code& ec);

    void copy_symlink(const path& existing_symlink, const path& new_symlink);
    void copy_symlink(const path& existing_symlink, const path& new_symlink,
                              error_code& ec) noexcept;

    bool create_directories(const path& p);
    bool create_directories(const path& p, error_code& ec);

    bool create_directory(const path& p);
    bool create_directory(const path& p, error_code& ec) noexcept;

    bool create_directory(const path& p, const path& attributes);
    bool create_directory(const path& p, const path& attributes,
                                  error_code& ec) noexcept;

    void create_directory_symlink(const path& to, const path& new_symlink);
    void create_directory_symlink(const path& to, const path& new_symlink,
                                          error_code& ec) noexcept;

    void create_hard_link(const path& to, const path& new_hard_link);
    void create_hard_link(const path& to, const path& new_hard_link,
                                  error_code& ec) noexcept;

    void create_symlink(const path& to, const path& new_symlink);
    void create_symlink(const path& to, const path& new_symlink,
                                error_code& ec) noexcept;

    path current_path();
    path current_path(error_code& ec);
    void current_path(const path& p);
    void current_path(const path& p, error_code& ec) noexcept;

    bool exists(file_status s) noexcept;
    bool exists(const path& p);
    bool exists(const path& p, error_code& ec) noexcept;

    bool equivalent(const path& p1, const path& p2);
    bool equivalent(const path& p1, const path& p2, error_code& ec) noexcept;

    uintmax_t    file_size(const path& p);
    uintmax_t    file_size(const path& p, error_code& ec) noexcept;

    uintmax_t    hard_link_count(const path& p);
    uintmax_t    hard_link_count(const path& p, error_code& ec) noexcept;

    bool is_block_file(file_status s) noexcept;
    bool is_block_file(const path& p);
    bool is_block_file(const path& p, error_code& ec) noexcept;

    bool is_character_file(file_status s) noexcept;
    bool is_character_file(const path& p);
    bool is_character_file(const path& p, error_code& ec) noexcept;

    bool is_directory(file_status s) noexcept;
    bool is_directory(const path& p);
    bool is_directory(const path& p, error_code& ec) noexcept;

    bool is_empty(const path& p);
    bool is_empty(const path& p, error_code& ec) noexcept;

    bool is_fifo(file_status s) noexcept;
    bool is_fifo(const path& p);
    bool is_fifo(const path& p, error_code& ec) noexcept;

    bool is_other(file_status s) noexcept;
    bool is_other(const path& p);
    bool is_other(const path& p, error_code& ec) noexcept;

    bool is_regular_file(file_status s) noexcept;
    bool is_regular_file(const path& p);
    bool is_regular_file(const path& p, error_code& ec) noexcept;

    bool is_socket(file_status s) noexcept;
    bool is_socket(const path& p);
    bool is_socket(const path& p, error_code& ec) noexcept;

    bool is_symlink(file_status s) noexcept;
    bool is_symlink(const path& p);
    bool is_symlink(const path& p, error_code& ec) noexcept;

    file_time_type  last_write_time(const path& p);
    file_time_type  last_write_time(const path& p, error_code& ec) noexcept;
    void last_write_time(const path& p, file_time_type new_time);
    void last_write_time(const path& p, file_time_type new_time,
                                 error_code& ec) noexcept;

    void permissions(const path& p, perms prms,
                     perm_options opts=perm_options::replace);
    void permissions(const path& p, perms prms, error_code& ec) noexcept;
    void permissions(const path& p, perms prms, perm_options opts,
                     error_code& ec);

    path proximate(const path& p, error_code& ec);
    path proximate(const path& p, const path& base = current_path());
    path proximate(const path& p, const path& base, error_code &ec);

    path read_symlink(const path& p);
    path read_symlink(const path& p, error_code& ec);

    path relative(const path& p, error_code& ec);
    path relative(const path& p, const path& base=current_path());
    path relative(const path& p, const path& base, error_code& ec);

    bool remove(const path& p);
    bool remove(const path& p, error_code& ec) noexcept;

    uintmax_t    remove_all(const path& p);
    uintmax_t    remove_all(const path& p, error_code& ec);

    void rename(const path& from, const path& to);
    void rename(const path& from, const path& to, error_code& ec) noexcept;

    void resize_file(const path& p, uintmax_t size);
    void resize_file(const path& p, uintmax_t size, error_code& ec) noexcept;

    space_info   space(const path& p);
    space_info   space(const path& p, error_code& ec) noexcept;

    file_status  status(const path& p);
    file_status  status(const path& p, error_code& ec) noexcept;

    bool status_known(file_status s) noexcept;

    file_status  symlink_status(const path& p);
    file_status  symlink_status(const path& p, error_code& ec) noexcept;

    path temp_directory_path();
    path temp_directory_path(error_code& ec);

    path weakly_canonical(path const& p);
    path weakly_canonical(path const& p, error_code& ec);

} // namespace std::filesystem

template <>
inline constexpr bool std::ranges::enable_borrowed_range<std::filesystem::directory_iterator> = true;
template <>
inline constexpr bool std::ranges::enable_borrowed_range<std::filesystem::recursive_directory_iterator> = true;

template <>
inline constexpr bool std::ranges::enable_view<std::filesystem::directory_iterator> = true;
template <>
inline constexpr bool std::ranges::enable_view<std::filesystem::recursive_directory_iterator> = true;

*/

#include <__assert> // all public C++ headers provide the assertion handler
#include <__config>
#include <__filesystem/copy_options.h>
#include <__filesystem/directory_entry.h>
#include <__filesystem/directory_iterator.h>
#include <__filesystem/directory_options.h>
#include <__filesystem/file_status.h>
#include <__filesystem/file_time_type.h>
#include <__filesystem/file_type.h>
#include <__filesystem/filesystem_error.h>
#include <__filesystem/operations.h>
#include <__filesystem/path.h>
#include <__filesystem/path_iterator.h>
#include <__filesystem/perm_options.h>
#include <__filesystem/perms.h>
#include <__filesystem/recursive_directory_iterator.h>
#include <__filesystem/space_info.h>
#include <__filesystem/u8path.h>
#include <version>

// standard-mandated includes
#include <compare>

#if defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY)
# error "The <filesystem> library is not supported since libc++ has been configured without support for a filesystem."
#endif

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

#endif // _LIBCPP_FILESYSTEM