std::experimental::filesystem::recursive_directory_iterator::depth

 

C++

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Utilities library

Strings library

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Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

 

Technical specifications

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals 2 TS)

Extensions for parallelism (parallelism TS)

Extensions for concurrency (concurrency TS)

Concepts (concepts TS)

Ranges (ranges TS)

Special mathematical functions (special math TR)

 

Filesystem library

Classes
filesystem::path filesystem::filesystem_error filesystem::directory_entry filesystem::directory_iterator filesystem::recursive_directory_iterator filesystem::file_status	filesystem::space_info filesystem::file_type filesystem::perms filesystem::copy_options filesystem::directory_options filesystem::file_time_type
Functions
filesystem::absolute filesystem::system_complete filesystem::canonical filesystem::copy filesystem::copy_file filesystem::copy_symlink filesystem::create_directory filesystem::create_directories filesystem::create_hard_link filesystem::create_symlink filesystem::create_directory_symlink filesystem::current_path filesystem::exists filesystem::equivalent	filesystem::file_size filesystem::hard_link_count filesystem::last_write_time filesystem::permissions filesystem::read_symlink filesystem::remove filesystem::remove_all filesystem::rename filesystem::resize_file filesystem::space filesystem::status filesystem::symlink_status filesystem::temp_directory_path
File types
filesystem::is_block_file filesystem::is_character_file filesystem::is_directory filesystem::is_empty filesystem::status_known	filesystem::is_fifo filesystem::is_other filesystem::is_regular_file filesystem::is_socket filesystem::is_symlink

 

recursive_directory_iterator

Member functions

recursive_directory_iterator::recursive_directory_iterator

recursive_directory_iterator::operator*recursive_directory_iterator::operator->

recursive_directory_iterator::options

recursive_directory_iterator::depth

recursive_directory_iterator::recursion_pending

recursive_directory_iterator::operator=

recursive_directory_iterator::incrementrecursive_directory_iterator::operator++

recursive_directory_iterator::pop

recursive_directory_iterator::disable_recursion_pending

Non-member functions

begin(recursive_directory_iterator)end(recursive_directory_iterator)

 

int depth() const;		(filesystem TS)

Returns the number of directories from the starting directory to the currently iterated directory, i.e. the current depth of the directory hierarchy.

The starting directory has depth of 0, its subdirectories have depth 1, etc.

The behavior is undefined if *this is the end iterator.

Parameters

(none)

Return value

Current depth of the directory hierarchy.

Exceptions

(none)

Example

this example uses iteration depth to calculate the indentation of a directory tree printout

Run this code

#include <fstream>
#include <iostream>
#include <string>
#include <experimental/filesystem>
namespace fs = std::experimental::filesystem;
 
int main()
{
    fs::create_directories("sandbox/a/b/c");
    fs::create_directories("sandbox/a/b/d/e");
    std::ofstream("sandbox/a/b/file1.txt");
    fs::create_symlink("a", "sandbox/syma");
    for(auto i = fs::recursive_directory_iterator("sandbox");
             i != fs::recursive_directory_iterator();
           ++i ) {
        std::cout << std::string(i.depth(), ' ') << *i;
        if(fs::is_symlink(i->symlink_status()))
            std::cout << " -> " << fs::read_symlink(*i);
        std::cout << '\n';
    }
    fs::remove_all("sandbox");
}

Output:

"sandbox/a"
 "sandbox/a/b"
  "sandbox/a/b/c"
  "sandbox/a/b/d"
   "sandbox/a/b/d/e"
  "sandbox/a/b/file1.txt"
"sandbox/syma" -> "a"