C++ 17 filesystem

filesystem

Abstract

How

Classes

Non-member functions

File types

Demo

Abstract

The Filesystem library provides facilities for performing operations on file systems and their components, such as paths, regular files, and directories.

Filesystem库提供了对文件系统及其组件(如路径、常规文件和目录)执行操作的工具。

How

Classes

Classes
Defined in header
Defined in namespace std::filesystem
path	represents a path (class)
filesystem_error	an exception thrown on file system errors (class)
directory_entry	a directory entry (class)
directory_iterator	an iterator to the contents of the directory (class)
recursive_directory_iterator	an iterator to the contents of a directory and its subdirectories (class)
file_status	represents file type and permissions (class)
space_info	information about free and available space on the filesystem (class)
file_type	the type of a file (enum)
perms	identifies file system permissions (enum)
perm_options	specifies semantics of permissions operations (enum)
copy_options	specifies semantics of copy operations (enum)
directory_options	options for iterating directory contents (enum)
file_time_type	represents file time values (typedef)

Non-member functions

Non-member functions
Defined in header
Defined in namespace std::filesystem
absolute	composes an absolute path (function)
canonicalweakly_canonical	composes a canonical path (function)
relativeproximate	composes a relative path (function)
copy	copies files or directories (function)
copy_file	copies file contents (function)
copy_symlink	copies a symbolic link (function)
create_directorycreate_directories	creates new directory (function)
create_hard_link	creates a hard link (function)
create_symlinkcreate_directory_symlink	creates a symbolic link (function)
current_path	returns or sets the current working directory (function)
exists	checks whether path refers to existing file system object (function)
equivalent	checks whether two paths refer to the same file system object (function)
file_size	returns the size of a file (function)
hard_link_count	returns the number of hard links referring to the specific file (function)
last_write_time	gets or sets the time of the last data modification (function)
permissions	modifies file access permissions (function)
read_symlink	obtains the target of a symbolic link (function)
removeremove_all	removes a file or empty directory removes a file or directory and all its contents, recursively (function)
rename	moves or renames a file or directory (function)
resize_file	changes the size of a regular file by truncation or zero-fill (function)
space	determines available free space on the file system (function)
statussymlink_status	determines file attributes determines file attributes, checking the symlink target (function)
temp_directory_path	returns a directory suitable for temporary files

File types

File types
is_block_file	checks whether the given path refers to block device (function)
is_character_file	checks whether the given path refers to a character device (function)
is_directory	checks whether the given path refers to a directory (function)
is_empty	checks whether the given path refers to an empty file or directory (function)
is_fifo	checks whether the given path refers to a named pipe (function)
is_other	checks whether the argument refers to an other file (function)
is_regular_file	checks whether the argument refers to a regular file (function)
is_socket	checks whether the argument refers to a named IPC socket (function)
is_symlink	checks whether the argument refers to a symbolic link (function)
status_known	checks whether file status is known (function)

Demo

sys::path src_dir("F:\\download");//或者const string src_dir = "F:\\download";
set dir_set;
for (sys::directory_iterator end, ite(src_dir); ite != end; ++ite)
{
    if(!is_directory(ite->path()))
        dir_set.insert(ite->path().filename().string());
};

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原文地址：https://blog.csdn.net/qq_32378713/article/details/126378696