Re: Extracting constructor name

Gracjan Polak schrieb:

Hi all,

To get a bit better error reporting and debugging I'd like to report constructor names misused. Example:

data X = A | B Int | C String

magic A = doSomething magic x = error $ "magic can only be used on A, you supplied " ++ constrName x

Maybe it is better then to have three distinct types A, B, C and provide a type class like Magic for the functionality that is only provided by A.