RE: Method TYPE?

From: [at]} <support{>
Date: Thu, 15 Aug 2002 19:45:10 +0200

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René,

we know the wish for a language construct along the lines you sketched.
Recent designs like Microsoft .Net's Delegate mechanism or Eiffel's Agents
provide exactly this. Nevertheless, we'd much rather keep our language small
and simple instead of increasing the number of concepts.

For your problem at hand, we therefore recommend using simple pointer to
record types with methods instead. Services.Actions or Stores.Operations,
for example, are modeled after this pattern. Maybe it helps to study those
examples.

Best regards,
Marc
Oberon microsystems, Inc.



-----Original Message-----
From: René Dorta [mailto:rene{([at]})nowhere.xy
Sent: Donnerstag, 15. August 2002 01:16
To: blackbox{([at]})nowhere.xy
Subject: Method TYPE?


We are used to PROCEDURE TYPEs. They are just nameless procedure
signatures, like: TYPE P = PROCEDURE (VAR t: T; i: INTEGER);
A formal parameter of this type can be replaced by procedure names like
"P1",
where "P1" is: PROCEDURE P1 (VAR t: T; i: INTEGER); BEGIN ... END P1;

What I wonder is about METHOD TYPEs, like:
TYPE M = PROCEDURE (VAR t: T) (i: INTEGER);
A formal parameter of this (hypothetic) TYPE could be replaced by "M1",
where "M1" is a method of class "T", or of an extension of T :
PROCEDURE (VAR t: T) M1 (i: INTEGER), NEW; BEGIN ... END M1;

... It would be so nice in our project about Programming with Threads in
Component Pascal. Is there some suitable alternative for a "Method
TYPE"?.

Regards, René Dorta,
Universidad de Carabobo. Venezuela.

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Received on Thu Aug 15 2002 - 19:45:10 UTC