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std::filesystem::path::replace_extension

From cppreference.com
< cpp‎ | filesystem‎ | path
 
 
 
 
path& replace_extension( const path& replacement = path() );
(1) (since C++17)

Replaces the extension with replacement or removes it when the default value of replacement is used.

Firstly, if this path has an extension(), it is removed from the generic-format view of the pathname.

Then, a dot character is appended to the generic-format view of the pathname, if replacement is not empty or does not begin with a dot character.

Then replacement is appended as if by operator+=(replacement)

Contents

[edit] Parameters

replacement - the extension to replace with

[edit] Return value

*this

[edit] Exceptions

(none)

[edit] Notes

The type of replacement is std::filesystem::path even though it is not intended to represent an object on the file system in order to correctly account for the filesystem character encoding.

[edit] Example

#include <iostream>
#include <filesystem>
namespace fs = std::filesystem;
 
int main()
{
    fs::path p = "/foo/bar.jpeg";
    std::cout << "Was: " << p << '\n';
    p.replace_extension(".jpg");
    std::cout << "Now: " << p.replace_extension(".jpg") << '\n';
}

Output:

Was: "/foo/bar.jpeg"
Now: "/foo/bar.jpg"

[edit] See also

returns the file extension path component
(public member function) [edit]
returns the filename path component
(public member function) [edit]
returns the stem path component
(public member function) [edit]
checks if the corresponding path element is not empty
(public member function)