Re: Extensible data types?

[Axel Simon]

On Mon, 25 Sep 2000, Jose Romildo Malaquias wrote:

> Is there any Haskell implementation that supports
> extensible data types, in which new value constructors
> can be added to a previously declared data type?

I think this is what the TREX (extensible records) in Hugs are about. Take
a look at

http://www.cse.ogi.edu/PacSoft/projects/Hugs/pages/hugsman/exts.html

section 7.2.

Axel.