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From: Tino Calancha <tino.calancha@gmail.com>
To: Wilfred Hughes <me@wilfred.me.uk>
Cc: emacs-devel <emacs-devel@gnu.org>
Subject: Re: Proposal: make prog2 a macro
Date: Fri, 7 Oct 2016 14:04:22 +0900 (JST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1610071403380.3520@calancha-pc> (raw)
In-Reply-To: <CAFXAjY55qb4Eit+skAOb7+8bKDCsCc2ftfkKJD8L2QH7p1fohg@mail.gmail.com>


On Fri, 7 Oct 2016, Wilfred Hughes wrote:

> I was looking at a list of Emacs' special forms, and noticed that
> prog2 is implemented in C. Is there any interest in moving this to a
> simple macro?
I don't have opinion about if this is worth or not, but i think is
safer to avoid the use of backquote:  prog2 could be used in an
early stage of the bootstrap.

Instead of:
> +  `(prog1
> +       (progn ,form1 ,form2)
> +     ,@body))

Better use:
   (cons 'prog1
         (cons (list 'progn form1 form2)
               body)))






  reply	other threads:[~2016-10-07  5:04 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-07  4:16 Proposal: make prog2 a macro Wilfred Hughes
2016-10-07  5:04 ` Tino Calancha [this message]
2016-10-07  7:46 ` John Wiegley
2016-10-07 20:34   ` Richard Stallman
2016-10-07  8:08 ` Tino Calancha
2016-10-08  2:12   ` Wilfred Hughes
2016-10-08  2:35     ` Noam Postavsky
2016-10-08  6:11       ` Eli Zaretskii
2016-10-08  3:40     ` Tino Calancha

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