From: "Norman H. Cohen" <ncohen@watson.ibm.com>
Subject: Re: Group newbie !
Date: 1996/12/30
Date: 1996-12-30T00:00:00+00:00 [thread overview]
Message-ID: <32C813AA.1F29@watson.ibm.com> (raw)
In-Reply-To: 680311364wnr@paley.demon.co.uk
Mike Paley wrote:
> > It really is worth investing the effort to learn the concepts
> > underlying the syntax.
>
> Are you implying I can't do that from the syntax ?
I certainly am.
Consider the example that started this thread, the need to specify an
index constraint for an uninitialized variable of type String. The
syntax of a variable declaration tells you that a variable declaration
includes a subtype name (or, as the syntax rules call it, a "subtype
mark") optionally followed by a constraint, and the syntax tells you the
various forms that constraints may take. But the syntax does not
explain which kinds of constraints are compatible with which kinds of
subtype marks, or which kinds of variable declarations REQUIRE a
constraint. You have to read the "fluff" to understand that.
--
Norman H. Cohen
mailto:ncohen@watson.ibm.com
http://www.research.ibm.com/people/n/ncohen
next prev parent reply other threads:[~1996-12-30 0:00 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-12-22 0:00 Group newbie ! Mike Paley
1996-12-23 0:00 ` Larry Kilgallen
1996-12-24 0:00 ` Mike Paley
1996-12-24 0:00 ` Norman H. Cohen
1996-12-28 0:00 ` john babrick
1996-12-29 0:00 ` Mike Paley
1996-12-30 0:00 ` Norman H. Cohen [this message]
1997-01-02 0:00 ` Mike Paley
1996-12-29 0:00 ` john babrick
1996-12-24 0:00 ` Rich Maggio
1996-12-25 0:00 ` Mike Paley
1996-12-27 0:00 ` Mike Paley
1997-01-05 0:00 ` Robert Dewar
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