Namespaces
Variants
Actions

std::filesystem::directory_entry::replace_filename

From cppreference.com
 
 
Filesystem library
 
std::filesystem::directory_entry
Member functions
Modifiers
directory_entry::replace_filename
Observers
Non-member functions
 
void replace_filename( const std::filesystem::path & p );
(1) (since C++17)
void replace_filename( const std::filesystem::path & p, std::error_code & ec );
(2) (since C++17)

Changes the filename of the directory entry.

Effectively modifies the path member by path.replace_filename(p) and calls refresh to update the cached attributes. If an error occurs, the values of the cached attributes are unspecified.

This function does not commit any changes to the filesystem.

[edit] Parameters

p - the path to append to the parent path of the currently stored path
ec - out-parameter for error reporting in the non-throwing overload

[edit] Return value

(none)

[edit] Exceptions

Any overload not marked noexcept may throw std::bad_alloc if memory allocation fails.

1) Throws std::filesystem::filesystem_error on underlying OS API errors, constructed with p as the first path argument and the OS error code as the error code argument.
2) Sets a std::error_code & parameter to the OS API error code if an OS API call fails, and executes ec.clear () if no errors occur.

[edit] Example

Run this code
#include <filesystem>
#include <iostream>
 
int main()
{
 namespace fs = std::filesystem;
 {
 fs::directory_entry entry{"alpha"};
 std::cout << entry << '\n';
 entry.replace_filename("omega");
 std::cout << entry << '\n';
 }
 {
 fs::directory_entry entry{"/alpha/"};
 std::cout << entry << '\n';
 entry.replace_filename("omega");
 std::cout << entry << '\n';
 }
}

Output:

"alpha"
"omega"
"/alpha/"
"/alpha/omega"

[edit] See also

assigns contents
(public member function) [edit]
replaces the last path component with another path
(public member function of std::filesystem::path) [edit]
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/filesystem/directory_entry/replace_filename&oldid=158089"

AltStyle によって変換されたページ (->オリジナル) /