[Zope3-dev] Re: Merging schema & interfaces (was: "Sub interface")

[Gary Poster]

Casey Duncan wrote:

> Combinatorial...complexity...must...resist...
> 
> all-the-worlds-a-functional-call-ly yr's,

;-)  What I wrote are conveniences.  What I wrote could probably be 
slightly changed to support a variant that accepts a lambda as an 
argument.

I think that some basic invariants are useful as individual functions, 
since it aids readability to the people I've shown the interfaces to.

I'd argue that there is a line to be drawn along a continuum between 
"everything's a lambda" and "we have a huge library of barely-used, 
simple invariants", rather than a "simple helper invariants are bad" 
rule.  YMMV, of course. :-)

Gary