(curry (inst map (U Complex False) String)
string->number)
... typechecks, but in your expression, you're going to need to handle
the possibility that the pattern variables in `list-rest` pattern are
#f.
- Jon
On Thu, Aug 22, 2019 at 4:15 PM Štěpán Němec <step...@gmail.com> wrote:
>
>
> I have a hard time persuading Typed Racket to accept the expression
> "(curry map string->number)". No amount of type annotations or added
> `inst`s (as recommended by the guide[1]) I could come up with seem to
> help.
>
> Is there a way to make it work?
>
> [1]
> https://docs.racket-lang.org/ts-guide/caveats.html#%28part._.Type_inference_for_polymorphic_functions%29
>
> Here's an example with a bit more context (solely for illustration
> purposes; I couldn't make the simple expression above work even
> isolated):
>
> (match-let ([(pregexp "#\\d+ +@ +(\\d+),(\\d+): +(\\d+)x(\\d+)"
> (list-rest _ (app (curry map string->number)
> (list x y dx dy))))
> "#1299 @ 414,871: 29x11"])
> x)
>
> Thank you,
>
> Štěpán
>
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