std::experimental::filesystem::remove, std::experimental::filesystem::remove_all

< cpp‎ | experimental‎ | fs
Technical Specification
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals TS v2)
Library fundamentals 3 (library fundamentals TS v3)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
Extensions for concurrency (concurrency TS)
Extensions for concurrency 2 (concurrency TS v2)
Concepts (concepts TS)
Ranges (ranges TS)
Reflection (reflection TS)
Mathematical special functions (special functions TR)
Experimental Non-TS
Pattern Matching
Linear Algebra
2D Graphics
Defined in header <experimental/filesystem>
bool remove( const path& p );
bool remove( const path& p, error_code& ec );
(1) (filesystem TS)
std::uintmax_t remove_all( const path& p );
std::uintmax_t remove_all( const path& p, error_code& ec );
(2) (filesystem TS)
1) The file or empty directory identified by the path p is deleted as if by the POSIX remove. Symlinks are not followed (symlink is removed, not its target).
2) Deletes the contents of p (if it is a directory) and the contents of all its subdirectories, recursively, then deletes p itself as if by repeatedly applying the POSIX remove. Symlinks are not followed (symlink is removed, not its target).


[edit] Parameters

p - path to delete
ec - out-parameter for error reporting in the non-throwing overload

[edit] Return value

1) true if the file was deleted, false if it did not exist. The overload that takes error_code& argument returns false on errors.
2) Returns the number of files and directories that were deleted (which may be zero if p did not exist to begin with). The overload that takes error_code& argument returns static_cast<std::uintmax_t>(-1) on error.

[edit] Exceptions

The overload that does not take an error_code& parameter throws filesystem_error on underlying OS API errors, constructed with p as the first argument and the OS error code as the error code argument. std::bad_alloc may be thrown if memory allocation fails. The overload taking an error_code& parameter sets it to the OS API error code if an OS API call fails, and executes ec.clear() if no errors occur. This overload has
noexcept specification:  

[edit] Notes

On POSIX systems, this function typically calls unlink and rmdir as needed, on Windows RemoveDirectoryW and DeleteFileW.

[edit] Example

#include <cstdint>
#include <experimental/filesystem>
#include <iostream>
namespace fs = std::experimental::filesystem;
int main()
    fs::path dir = fs::temp_directory_path();
    fs::create_directories(dir / "abcdef/example");
    std::uintmax_t n = fs::remove_all(dir / "abcdef");
    std::cout << "Deleted " << n << " files or directories\n";

Possible output:

Deleted 2 files or directories

[edit] See also

erases a file
(function) [edit]