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

[Erik Hesselink]

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 <john at repetae.net> 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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