From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=unavailable autolearn_force=no version=3.4.4
X-Received: by 10.107.165.197 with SMTP id o188mr35629508ioe.34.1438091385304;
        Tue, 28 Jul 2015 06:49:45 -0700 (PDT)
X-Received: by 10.140.104.147 with SMTP id a19mr508892qgf.2.1438091385176;
 Tue, 28 Jul 2015 06:49:45 -0700 (PDT)
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!feeder.eternal-september.org!news.glorb.com!f3no3982572igg.0!news-out.google.com!4ni82434qgh.1!nntp.google.com!69no2426489qgl.1!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Tue, 28 Jul 2015 06:49:44 -0700 (PDT)
In-Reply-To: <75a31df9-801e-4e7f-8e29-403c0650c891@googlegroups.com>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=81.203.145.32;
 posting-account=AFCLjAoAAABJAOf_HjgEEEi3ty-lG5m2
NNTP-Posting-Host: 81.203.145.32
References: <e610ca1e-4df6-4fbb-b3a1-ac35694d9072@googlegroups.com>
 <mp7pn9$mb3$1@dont-email.me> <1ckwx9hern944$.1w0k6fbvlqo62$.dlg@40tude.net>
 <fddb0ac0-6554-44d6-9c23-7c23883884d3@googlegroups.com>
 <1ipfeas9434z5.o8661mp0cpkh.dlg@40tude.net>
 <75a31df9-801e-4e7f-8e29-403c0650c891@googlegroups.com>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <c8c8360f-f5bf-44ea-a9c0-f10f052abcda@googlegroups.com>
Subject: Re: Running a preprocessor from GPS?
From: EGarrulo <egarrulo@gmail.com>
Injection-Date: Tue, 28 Jul 2015 13:49:45 +0000
Content-Type: text/plain; charset=ISO-8859-1
Xref: news.eternal-september.org comp.lang.ada:27087
Date: 2015-07-28T06:49:44-07:00
List-Id: <comp.lang.ada>

On Tuesday, July 28, 2015 at 3:18:06 PM UTC+2, EGarrulo wrote:
> On Tuesday, July 28, 2015 at 2:54:50 PM UTC+2, Dmitry A. Kazakov wrote:
> > Preprocessor is never a way.
> 
> Indeed it shouldn't.  A preprocessor is a workaround for the limitations
> of a programming language.  Ideally, you shouldn't need a preprocessor,
> but -- alas -- how many languages make a preprocessor redundant?

In this case, a deficiency of Ada is that Ada doesn't allow you to
evaluate an expression lazily.  Let's imagine that Ada had a `lazy`
keyword to evaluate an expression lazily.  Then I could have written:

    Trace (Me, lazy "Performing Step " & Step(...));

without any need for a preprocessor.