From: Basil Contovounesios <contovob@tcd.ie>
To: Richard Stallman <rms@gnu.org>
Cc: Lynn Winebarger <owinebar@gmail.com>,
damien@cassou.me, eliz@gnu.org, emacs-devel@gnu.org
Subject: Re: Using the content of a dynamic variable in a macro
Date: Mon, 27 Feb 2023 19:05:42 +0000 [thread overview]
Message-ID: <87h6v753p5.fsf@tcd.ie> (raw)
In-Reply-To: <E1pWU7q-0002bW-JN@fencepost.gnu.org> (Richard Stallman's message of "Sun, 26 Feb 2023 22:24:30 -0500")
Richard Stallman [2023-02-26 22:24 -0500] wrote:
> > Lexical binding isn't the issue - the variable is global in scope.
> > The issue is that when you explicitly run the byte-compiler in batch mode,
> > the "defvar" expression is only compiled, not evaluated, while the defmacro
> > is evaluated, and the application of the macro function is evaluated during
> > compilation.
>
> Should we change this to evaluate defvar in batch mode?
The byte-compiler avoids evaluating the defvar also in non-batch mode.
So the question is how much of the code that it is compiling should the
byte-compiler evaluate.
We may need to reuse or possibly extend the notions of Lisp code safety
we have before the byte-compiler can start evaluating arbitrary
expressions. I'm not sure it's worth the complexity.
--
Basil
next prev parent reply other threads:[~2023-02-27 19:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-25 8:34 Using the content of a dynamic variable in a macro Damien Cassou
2023-02-25 9:38 ` Eli Zaretskii
2023-02-25 9:43 ` Damien Cassou
2023-02-25 12:32 ` Lynn Winebarger
2023-02-27 3:24 ` Richard Stallman
2023-02-27 19:05 ` Basil Contovounesios [this message]
2023-02-28 2:44 ` Lynn Winebarger
2023-02-25 9:40 ` tomas
2023-02-27 19:03 ` Basil Contovounesios
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