Does anyone know the explanation of this !!!

[neokewl]

type Person = String
type Book = String

are the two types tht i have defined. when i define a type tht corresponds to a tuple of Person and Book, i get the following error:

type database = [ (Person, Book) ]

' Malformed LHS to type of class declaration '

but when i change to :

type Database = [ (Person, Book)] , things are fine and everything seems proper...

a) Why does this happen ?
b) What is the meaning of the above error specified ?

Thanx..
NeoKewl...

[rdrake]

Well...

code:

Prelude> :t 5 5 :: (Num t) => t

Hm...

code:

Prelude> :t "HI!" "HI!" :: [Char]

Hmmmmmmmm...

code:

Prelude> :t 5 ** 2 5 ** 2 :: (Floating t) => t

Seems to me like every datatype in Haskell begins with a capital letter. Maybe that could be why?

The error, of course, tells us that.

[neokewl]

Hey ..

possibly could mean that .... dint think of tht ...thnx buddy...