std::filesystem::begin(directory_iterator), std::filesystem::end(directory_iterator)
From cppreference.com
< cpp | filesystem | directory iterator
Defined in header <filesystem> | ||
directory_iterator begin( directory_iterator iter )noexcept; | (1) | (since C++17) |
directory_iterator end( directory_iterator )noexcept; | (2) | (since C++17) |
1) Returns iter unchanged.
2) Returns a default-constructed directory_iterator, which serves as the end iterator. The argument is ignored.
These non-member functions enable the use of directory_iterators with range-based for loops and make directory_iterator a range type(since C++20).
Contents |
[edit]Parameters
| iter | - | a directory_iterator |
[edit]Return value
1)iter unchanged.
2) End iterator (default-constructed
directory_iterator).[edit]Example
Run this code
#include <filesystem>#include <fstream>#include <iostream>namespace fs = std::filesystem; int main(){ fs::create_directories("sandbox/a/b");std::ofstream("sandbox/file1.txt");std::ofstream("sandbox/file2.txt");for(auto& p : fs::directory_iterator("sandbox"))std::cout<< p <<'\n'; fs::remove_all("sandbox");}
Possible output:
"sandbox/a" "sandbox/file1.txt" "sandbox/file2.txt"
[edit]Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 3480 | C++17 | end took the argument by reference | takes the argument by value |
[edit]See also
| range-based for loop support (function) |
