Bonjour Jean-Louis,
experimenting with your (great and colorized!) oorexxshell-replacement for
rexxtry.rex, I saw that
you have been applying your new extension mechanism in some of the Rexx
pakcages that you
automatically load, e.g. "extension/extension.cls".
A few questions:
* How stable is your implementation of extensions? Are there any unexpected
side-effects to be
expected?
* How can one achieve the following extension (from "extensions.cls")
directives dynamically at
runtime (e.g. if one creates a method object for the 'quoted' method at
runtime, how could one
use that to extend the .String class at runtime) ?
::extension String
::method quoted
use strict arg quote='"'
return quote || self~changeStr(quote,quote||quote) || quote
* How is it possible to learn which methods got extended in a class?
* What happens, if different programs extend a class with a method by the
same name? Is this
allowed, and if so what are the rules (each extension method replaces an
exisiting extended
method; or it is an error to extend a method, if the method exists already)?
* Is it possible to remove an extended method later in the program? If so,
how?
For sure your extension mechanism would solve quite a few problems for ooRexx
programmers, who have
a need to extend existing classes for their purposes. I remember there were
from time to time
requests to allow for that, especially extending some of the Rexx-supplied
classes, e.g. the .String
class, which seems to work judging from your ooRexxShell employed
extensions.cls!
Very interesting, indeed !
Best regards,
---rony
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