Comment by the8472

It depends on which API the application uses to pass paths to the OS and whether its path handling library does internal parsing that is or is not aware of those prefixes.

For example rust has support[0] for the magical file path prefixes[1] that can be used to escape path length restrictions, reserved identifiers and some other limitations. This is used by default whenever you normalize a part, which means it has fewer restrictions than windows explorer has by default.

[0] https://doc.rust-lang.org/std/path/enum.Prefix.html [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/nami...