Filesystem style double tab output

[alw017]

Is it possible to implement a filesystem style autocomplete? What I want is something like this: Given a prefix "foo/", three possible completions, ["foo/b.txt", "foo/c.txt", "foo/d.txt"], I want the output to display

b.txt c.txt d.txt

and given a prefix "foo/b", it should autocomplete to "foo/b.txt". I haven't found anything on the documentation hinting at supporting this behavior, but is it possible to override CompletionFinder to achieve this?

[kislyuk]

Sorry I didn't respond sooner, but just for completeness: this is already how completions work. The shell completion engine will automatically do what you describe for you, there is no need for extra configuration overrides.