Accessing Classes in Functors.

[Peter Van Roy]

Alan Oswald wrote:
> I'm looking at the use of relational programming in connection with 
> databases.  I've created a functor for the code that defines the 
> Choose procedure and the Relation Class and its methods.  Now I need 
> to know how to access these from the main program so that I can do Rel 
> = {New RelationClass init} etc.  I know it's in the book but I also 
> know that I will get a quick concise answer that will save me a lot of 
> time finding what I need.
>  
> Alan
There's an example in section 9.6 of CTM (page 654) that
explains everything including how to call the relation from
the main program (see section 9.6.2).  It's very easy:
dictionaries can be manipulated directly in the main program,
but any code using choice must be encapsulated inside a
Solve or SolveAll.

Peter