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

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C++
 
Technical specifications
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals 2 TS)
Extensions for parallelism (parallelism TS)
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Special mathematical functions (special math TR)
 
Filesystem library
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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.

Contents

[edit] Parameters

(none)

[edit] Return value

Current depth of the directory hierarchy.

[edit] Exceptions

(none)

[edit] 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"
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