View source code
Display the source code in std/path.d from which this page was generated on github.
Report a bug
If you spot a problem with this page, click here to create a Bugzilla issue.
Improve this page
Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Function std.path.withExtension

Replace existing extension on filespec with new one.

auto auto withExtension(R, C) (
  R path,
  C[] ext
if (isRandomAccessRange!R && hasSlicing!R && hasLength!R && isSomeChar!(ElementType!R) && !isSomeString!R && isSomeChar!C);

auto auto withExtension(C1, C2) (
  C1[] path,
  C2[] ext
if (isSomeChar!C1 && isSomeChar!C2);


path string or random access range representing a filespec
ext the new extension


Range with path's extension (if any) replaced with ext. The element encoding type of the returned range will be the same as path's.

See Also



import std.array;
writeln(withExtension("file", "ext").array); // "file.ext"
writeln(withExtension("file"w, ".ext"w).array); // "file.ext"
writeln(withExtension("file.ext"w, ".").array); // "file."

import std.utf : byChar, byWchar;
writeln(withExtension("file".byChar, "ext").array); // "file.ext"
writeln(withExtension("file"w.byWchar, ".ext"w).array); // "file.ext"w
writeln(withExtension("file.ext"w.byWchar, ".").array); // "file."w


Lars Tandle Kyllingstad, Walter Bright, Grzegorz Adam Hankiewicz, Thomas Kühne, Andrei Alexandrescu


Boost License 1.0