[Haskell-cafe] Intersection types for Haskell?

[Brian Hulley]

Brian Hulley wrote:
> Taral wrote:
>> I have no idea what kind of function would have type (a -> b & c ->
>> d). Can you give an example?
>
> g x = x
>
> because g 3 = 3 so g has type Int -> Int but also g 'a' = 'a' so g
> has type Char -> Char hence g has type Int -> Int & Char -> Char

Actually I should have said "g's type *matches* (Int->Int & Char->Char)" 
since of course g has type a->a.

Regards, Brian.