From: Stefan Monnier <monnier@iro.umontreal.ca>
To: akater <nuclearspace@gmail.com>
Cc: "Basil L. Contovounesios" <contovob@tcd.ie>, emacs-devel@gnu.org
Subject: Re: defmacro with built-in gensym declaration and initialization
Date: Thu, 21 Jan 2021 15:50:12 -0500 [thread overview]
Message-ID: <jwvo8hixbld.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <875z3q6q51.fsf@gmail.com> (akater's message of "Thu, 21 Jan 2021 19:34:02 +0000")
> What's the purpose of TEST in macroexp-let2, then, other than to
> minimise bindings in the expansion?
The purpose is indeed just one of optimization applied to the
source code.
> (Which I presume is only relevant when Elisp's byte compiler is used
> to compile the expanded form.)
It's relevant both when the code is byte-compiled and when
it's interpreted. But that depends on implementation details, so indeed
it can become useless in the future if/when we improve the interpreter
and/or compiler. I don't know if it's still relevant when using the
native compiler, indeed.
Stefan
next prev parent reply other threads:[~2021-01-21 20:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 8:15 defmacro with built-in gensym declaration and initialization akater
2021-01-20 13:46 ` Basil L. Contovounesios
2021-01-20 15:09 ` Stefan Monnier
2021-01-20 16:47 ` Robin Tarsiger
2021-01-20 19:28 ` akater
2021-01-20 20:55 ` Basil L. Contovounesios
2021-01-21 19:34 ` akater
2021-01-21 20:50 ` Stefan Monnier [this message]
2021-01-21 20:50 ` Basil L. Contovounesios
2021-01-21 21:05 ` Stefan Monnier
2021-01-21 21:23 ` Basil L. Contovounesios
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