Re: Component Pascal wish list

From: [at]} <ftkachov{>
Date: Mon, 17 Jun 2002 15:55:37 +0400 (MSK DST)

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I suggest that every effort be made to keep
the language as simple as possible.

The "mucking aroung with hardware registers" does not appear to offer
enough general usefulness to justify the complication of 1- and 2-byte SETs.

Am I mistaken that constructors present a problem (something to do with
the order of initialization)?
Is not a LIMITED type together with a factory procedure to generate
the objects sufficient for the cases when a non-trivial constructor
is really necessary?

One fundamental issue related to safety
seems to be the absence of read-only export for arrays. For instance,

        TYPE Array- = ARRAY OF BYTE;

would mean that a variable declared e.g. as

        VAR a-: POINTER TO Array;

would make the array elements visible from the outside but read-only.

For arrays of INTEGER Ominc came up with a trick to achieve that
(ARRAY OF RECORD val-: INTEGER END).

Such a feature is needed to allow a safe browsing of
dynamically generated data structure (gigabytes),
consisting of variously linked arrays.

But again, any such modification must be weighted against
the cost of implementation and the cost of say port to Linux
or some other platform.

The simplicity of Oberon/C.Pascal/BlackBox is a treasure of great value.

Cheers,
Fyodor Tkachov

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Received on Mon Jun 17 2002 - 13:55:37 UTC