std::filesystem::path::replace_filename (3) Linux Manual Page

std::filesystem::path::replace_filename – std::filesystem::path::replace_filename

Synopsis

path& replace_filename( const path& replacement ); (since C++17)
Replaces a single filename component with replacement.
Equivalent to the following:

remove_filename();

operator/=(replacement);

The behavior is undefined if the path has no filename component (has_filename returns false).

Parameters

(none)

Return value

*this

Exceptions

(none)

Example

// Run this code

#include <iostream>

#include <filesystem>

namespace fs = std::filesystem;
int main()

{
    std::cout << fs::path("/foo").replace_filename("bar") << '\n'
              << fs::path("/").replace_filename("bar") << '\n';
}

Output:

  "/bar"
  "bar"

See also

                  replaces the extension
replace_extension (public member function)
                  returns the filename path component
filename (public member function)
                  removes filename path component
remove_filename (public member function)
                  checks if the corresponding path element is not empty
has_filename (public member function)