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std::filesystem::recursive_directory_iterator::disable_recursion_pending

From cppreference.com
 
 
 
 
void disable_recursion_pending();
(since C++17)

Disables recursion to the currently referred subdirectory, if any.

The call modifies the pending recursion flag on the iterator in such a way that the next time increment is called, the iterator will advance within the current directly even if it is currently referring to a subdirectory that hasn't been visited.

The status of the pending recursion flag can be queried with recursion_pending(), which is false after this call. It is reset back to true after increment, and its initial value is also true.

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

Contents

[edit] Parameters

(none)

[edit] Return value

(none)

[edit] Exceptions

May throw implementation-defined exceptions.

[edit] Example

#include <cstdlib>
#include <fstream>
#include <iostream>
#include <string>
#include <filesystem>
namespace fs = std::filesystem;
 
int main()
{
    fs::current_path(fs::temp_directory_path());
    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");
    std::system("tree sandbox");
    for(auto i = fs::recursive_directory_iterator("sandbox");
             i != fs::recursive_directory_iterator();
           ++i ) {
        std::cout << std::string(i.depth()*2, ' ') << *i;
        if(fs::is_symlink(i->symlink_status()))
            std::cout << " -> " << fs::read_symlink(*i);
        std::cout << '\n';
 
        // do not descend into "b"
        if(i->path().filename() == "b")
            i.disable_recursion_pending();
    }
    fs::remove_all("sandbox");
}

Possible output:

sandbox
├── a
│   └── b
│       ├── c
│       ├── d
│       │   └── e
│       └── file1.txt
└── syma -> a
 
"sandbox/a"
  "sandbox/a/b"
"sandbox/syma" -> "a"

[edit] See also

checks whether the recursion is disabled for the current directory
(public member function) [edit]
advances to the next entry
(public member function) [edit]