Re: VARIANT / ANYTYPE datatype

Excerpts from Bruce Momjian's message of mar may 10 16:21:36 -0400 2011:
> Darren Duncan wrote:
> > To follow-up, an additional feature that would be useful and resembles union 
> > types is the variant where you could declare a union type first and then 
> > separately other types could declare they are a member of the union.  I'm 
> > talking about loosely what mixins or type-roles or interfaces etc are in other 
> > languages.  The most trivial example would be declaring an ENUM-alike first and 
> > then separately declaring the component values where the latter declare they are 
> > part of the ENUM, and this could make it easier to add or change ENUM values. 
> > But keep in mind that this is a distinct concept from what we're otherwise 
> > talking about as being union types. -- Darren Duncan
> 
> Should this be a TODO item?

The general idea of C-style unions, sure.  Mixin-style stuff ... not sure.
Seems like it'd be pretty painful.

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Álvaro Herrera <alvherre@commandprompt.com>
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