So it's a type constructor, not a type? Could you please provide a simple example of its usage?
Michael --- On Tue, 8/31/10, Vo Minh Thu <[email protected]> wrote: From: Vo Minh Thu <[email protected]> Subject: Re: [Haskell-cafe] On to applicative To: "michael rice" <[email protected]> Cc: [email protected] Date: Tuesday, August 31, 2010, 1:17 PM 2010/8/31 michael rice <[email protected]> > > "Learn You a Haskell ..." says that (->) is a type just like Either. Where > can I find its type definition? You can't define it *in* Haskell as user code. It is a built-in infix type constructor (Either or Maybe are type constructors too, not just types). In fact, if you want to implement a simple, typed functional language, you'll find it is the only built-in type constructor you have to implement (as the implementor of the language). Also, Show a => a is a type too, but you won't find a definition for 'a' or for '=>'. All those things are defined by the language. Cheers, Thu
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