[Haskell-beginners] applicative default structure

Ovidiu Deac ovidiudeac at gmail.com
Thu Dec 22 15:18:16 UTC 2016


My understanding is that x can take any form required for type-inference.
That's fine but what is the "default" structure if you don't specify any?

On Thu, Dec 22, 2016 at 5:13 PM, Imants Cekusins <imantc at gmail.com> wrote:

> > What is f here?
>
> anything Applicative:
>
> Prelude> let a1 = pure 1
> Prelude> let a2 = pure 1
>
> Prelude> (a1::Maybe Int) == a2
> True
> Prelude> (a1::Maybe Float) == a2
> True
> Prelude> (a1::Either String Float) == a2
> True
>
>
> ‚Äč
>
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