Re: [Haskell-cafe] Is there a better way to subtyping?

However, be aware that aFields, bFields and cFields are now partial functions that will crash when applied to the wrong constructor. Not a-okay in my book. Erik On Wed, Mar 14, 2012 at 02:24, John Meacham wrote:

Why not

data Super        = SuperA {                commonFields :: ()                aFields :: ()                }        | SuperB {                commonFields :: ()                bFields :: ()                }        | SuperC {                commonFields :: ()                cFields :: ()                }

reusing the common field names between constructors like this is a-okay.

  John

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