On Sun, Sep 5, 2010 at 3:06 AM, Hari Prashanth <krh...@ccs.neu.edu> wrote:
> Is this what you are looking for?
>
> (require/typed racket/base
>               [file-or-directory-modify-seconds
>                (String (Option Integer) (-> exn:fail:filesystem) -> (U 
> Integer Void))])

Hari is correct that you can use `require/typed' on `racket/base'.
However, that type isn't quite right - it shouldn't *return*
`exn:fail:filesystem' - that is an exception that might be raised.

The true type is more complex; I'll add it to the base environment.
-- 
sam th
sa...@ccs.neu.edu
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