On Mon, Sep 25, 2000 at 02:42:20PM +0200, John Hörnkvist wrote: > If you use Hugs -- and possibly GHC -- you might be able to use the > "Either" constructor for subtyping. I first saw this pattern in > "Modular Monadic Interpreters" (or something like that) by Jones, > Liang and Hudak. > [...] Thanks for the sugestions. For now I will try the solution posted by Peter Achten, but yours will be in my bag for futre consideration, when I should decide the design. Regards, Romildo -- Prof. José Romildo Malaquias <[EMAIL PROTECTED]> Departamento de Computação Universidade Federal de Ouro Preto Brasil
- Re: Extensible data types? Carl R. Witty
- Re: Extensible data types? S.J.Thompson
- Re: Extensible data types? Axel Simon
- Re: Extensible data types? Jose Romildo Malaquias
- Re: Extensible data types? Ch. A. Herrmann
- Re: Extensible data types? Jose Romildo Malaquias
- Re: Extensible data types? Axel Simon
- Re: Extensible data types? Rob MacAulay
- RE: Extensible data types? Chris Angus
- Re: Extensible data types? John Hörnkvist
- Re: Extensible data types? Jose Romildo Malaquias
- Re: Extensible data types? Peter Achten
- Re: Extensible data types? Keith Wansbrough
- RE: Extensible data types? Chris Angus
- Re: Extensible data types? Jose Romildo Malaquias
- Re: Extensible data types? Peter Achten
- Re: Extensible data types? Jose Romildo Malaquias
- Re: Extensible data types? Peter Achten
- RE: Extensible data types? Chris Angus
- Re: Extensible data types? Jose Romildo Malaquias
- Re: Extensible data types? José Romildo Malaquias