(unknown charset) Re: [BLACKBOX] Read-only IN parameters for all data types

From: (unknown charset) Oleg N. Cher <"Oleg>
Date: Wed, 20 Feb 2008 12:02:05 +0200

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Dear Chris,

As likely you know, there is in Delphi:

PROCEDURE Do (CONST a: INTEGER);

It is similar to parameter IN proposed by you.
As the majority of parameters in a procedure
are read-only, we should will emphasize it by using of IN.
And we shall litter unduly texts of programs by
the using of IN.
But, as shows experience, Delphi programmers more often
do not like use the CONST in such a way.
They prefer to use the most simple way of recording of transmitted parameters:

PROCEDURE Do (a: INTEGER);

Therefore I shall agree to write read-only parameters so more likely:

PROCEDURE Do (a: INTEGER);

And parameters which can be changed in a body of procedure,
for example, so:

PROCEDURE Do (VALUE a: INTEGER);

Or to not accent on this way of recording of parameters.

PROCEDURE Do (a: INTEGER); (* The majority of procedures use read-only parameters *)

Prof. Wirth is a good psychologist of programming.
He knows that too big number of excessive possiblities
generates bulky languages. See, "problem" of Oberon that it is too small,
And everyone has the sights at its own posiblities, ;-)
And everyone want to develop the own Oberon subset and own compiler :)
As a result, we have many "student's" realizations of the compilers,
and very little serious compilers for practical problems.
And serious people o not know what compiler to use, because they think,
that all compilers of the Oberon are bad.
I would prefer, that be less number of compilers, but better.
And one standard, not best of bests standard, but checked up
by time and which is accepted with many people.

I too would prefer to see the standard some another. :-)
For example, I like unsigned arithmetics and binary operations
(and, or, xor) in language. But I know, that high portability
of the Oberon is due to the standard which let not the best,
but we accept for the big circe of problems.

Instead of it I suggest to expand a way of use IN so:

  IF a IN {0..1000} THEN ... END;

Current BlackBox realization does not accept such using of sets.
But such way of recording is good and evident. What will say?


Oleg N. Cher,
Colossoft Research.
allot{([at]})nowhere.xy
2008-02-20

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Received on Wed Feb 20 2008 - 11:02:05 UTC