std::filesystem::directory_entry::replace_filename
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< cpp | filesystem | directory entry
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Feature test macros (C++20)
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Execution control library (C++26)
std::filesystem::directory_entry
Member functions
Modifiers
directory_entry::replace_filename
Observers
(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)
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
replaces the last path component with another path
(public member function of
(public member function of
std::filesystem::path) [edit]