[Oberon] Calling a command from within a normal procedure

[Chris Burrows]

> -----Original Message-----
> From: Oberon [mailto:oberon-bounces at lists.inf.ethz.ch] On Behalf Of
> Srinivas Nayak
> Sent: Monday, 7 March 2016 10:29 PM
> To: ETH Oberon and related systems
> Subject: Re: [Oberon] Calling a command from within a normal
> procedure
> 
> I mean calling Edit.Open as we call String.Ln in a procedure.
> To my knowledge, an exported parameter-less procedure can be a
> command.
> Then what is the difference between Edit.Open and String.Ln?
> 

(I attempted to send this clarification to my previous reply, earlier -
apologies if I'm repeating myself)

No difference in the way they are called. However, some commands expect
interactive input (e.g. via a Texts.Scanner). Here's a simple test program
that illustrates calling a parameterless exported procedure (Edit.Open) from
another procedure:

MODULE Command;

IMPORT Edit;

PROCEDURE Run*;
BEGIN
  Edit.Open
END Run;

END Command.

Regards,
Chris