Substitute the definition of type Table into the error:
Type error in explicitly typed binding
*** Term : [(a,p)]
*** Type : [(a,b)]
*** Does not match : [Table]
where [Table] = [[(Address,Port)]]
Do you see why the expression [ (a,p) ] cannot have type [ [
(Address, Port) ] ] ?
Regards,
Chris
On 11/1/07, karle
My declaration is as followed:-
type Address = Int data Port = C | D deriving(Eq,Show) data Payload = UP[Char] | RTDP(Address,Port) deriving(Eq,Show) data Pkgtype = RTD | U deriving(Eq,Show) type Pkg = (Pkgtype,Address,Payload) type Table = [(Address,Port)]
findport::[Pkg]->[Table]->[([Pkg],[Pkg])] findport [(pt,ad,pa)] [(a,p)] | ( p == C) = ([pt,ad,a],[]) | otherwise = ([],[pt,ad,a])
Error received:-
Type error in explicitly typed binding *** Term : [(a,p)] *** Type : [(a,b)] *** Does not match : [Table]
Can anyone please help? -- View this message in context: http://www.nabble.com/Need-help-from-a-newby-tf4735009.html#a13540531 Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.
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