Well, in this example I don't see how this would even be close to possible. How would it know that 1 is supposed to be an Int a2.0 a Float? 1 has type 'Num a => a' and 2.0 has type 'Fractional a => a' so how the compiler know you want Int and Float?
-- Lennart
On 6/16/07, Anatoly Yakovenko <aeyakovenko@gmail.com> wrote:
If I define something like this:
data Bar = Bi Int
| Bf String
deriving Show
data Foo = Fi Int
| Fs Float
deriving Show
func::Foo -> Bar
func (Fi xx) = Bi xx
func (Fs ff) = Bf (show ff)
I can do:
> map func [(Fi 1), (Fs 2.0)]
[Bi 1,Bf "2.0"]
but what i really want to do is just do
map func [1, 2.0]
[1, "2.0"]
I understand that this is impossible in haskell, but why cant the
compiler generate the Foo and Bar data types for me and just require
that i have a func defined for Int -> Int and Float -> String?
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