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From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada.Execution_Time
Date: Tue, 21 Dec 2010 12:19:47 -0500
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Date: 2010-12-21T12:19:47-05:00
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On Mon, 20 Dec 2010 22:23:12 -0500, Robert A Duff wrote:
>
>> Anyway, the strong syntactic separation between declarations
>> and statements makes no sense in a language where declarations
>> are executable code.  I think it's just wrong-headed thinking
>> inherited from Pascal.
>
> It still does have sense in a language with lexical scopes. You need some
> syntactically recognizable point where all things of the same scope become
> usable.

Yes, you need such a "syntactically recognizable point".
But that doesn't require any separation of declarations
from statements.  If My_Assert is just a regular
user-defined procedure, then I see nothing wrong with:

    procedure P is
        X : T1 := ...;
        My_Assert(Is_Good(X)); -- Not Ada!
        Y : T2 := ...;
        My_Assert(not Is_Evil(Y));
        ...

without sprinkling "declares" and "begins" all over.

- Bob