[Oberon] Intermediate scopes in Oberon-07

Andreas Pirklbauer andreas_pirklbauer at yahoo.com
Sat Feb 10 14:44:04 CET 2018

  > Hi all
  > In low layer modules, I like to declare local TYPEs in a
  > procedure to redefine the TYPE of a parameter. Just as an
  > example parameter is INTEGER, I would like to work with
  > C4 = ARRAY 4 OF CHAR. Obviously, I could work on the
  > parameter with pure SYSTEM.GETs but for the sake of the
  > example let’s stick to C4 for a minute.
  > Now, as Oberon has no macros, I declare in my PROCEDURE
  > with the local C4 another nested procedure as kind of
  > writing shortcut in my procedure’s code.
  > Et voila, I‘m in the situation where the nested procedure
  > should have access to the intermediately declared C4.
  > Would you accept this as a valid example for intermediate TYPEs?
  > Jörg

I assume you mean something like this:

      TYPE C4 = ARRAY 4 OF CHAR;
        VAR c4: C4;             (*intermediate type C4 used here*)
      END Q;

    END P;
  END M.

The current official Oberon compiler, as published in projectoberon.com <http://projectoberon.com/>,
would accept it, my slightly modified compiler from the last post wouldn’t
and would require C4 to be declared globally.

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