From: Bob Rogers <rogers-emacs@rgrjr.dyndns.org>
Cc: emacs-devel <emacs-devel@gnu.org>
Subject: eval-when-compile vs defconst
Date: Sat, 11 Nov 2006 12:01:14 -0500 [thread overview]
Message-ID: <17750.474.277857.851065@rgrjr.dyndns.org> (raw)
In-Reply-To: <ulkmi6o9n.fsf@member.fsf.org>
From: Stephen Leake <stephen_leake@member.fsf.org>
Date: Sat, 11 Nov 2006 09:39:32 -0500
I ran across this construct in ada-mode.el:
(eval-when-compile
(defconst ada-95-string-keywords
'("abstract" "aliased" "protected" "requeue" "tagged" "until")
"List of keywords new in Ada 95.
Used to define `ada-*-keywords'."))
Is there any point to the 'eval-when-compile'? Help for
eval-when-compile says;
Like `progn', but evaluates the body at compile time if you're
compiling. Thus, the result of the body appears to the compiler as
a quoted constant. In interpreted code, this is entirely
equivalent to `progn'.
Since the body is already a quoted constant, this seems redundant. I
suspect the eval-when-compile is left over from a previous version
when functions where used to build the string.
It says "the _result_ of the body", i.e. after compile-time evaluation.
-- Bob Rogers
http://rgrjr.dyndns.org/
next prev parent reply other threads:[~2006-11-11 17:01 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-11 14:39 eval-when-compile vs defconst Stephen Leake
2006-11-11 17:01 ` Bob Rogers [this message]
2006-11-11 17:03 ` Bob Rogers
2006-11-12 5:14 ` Richard Stallman
2006-11-12 14:29 ` Stephen Leake
2006-11-12 19:06 ` Markus Triska
2006-11-13 9:43 ` Richard Stallman
2006-11-13 18:41 ` Stuart D. Herring
2006-11-13 18:46 ` Markus Triska
2006-11-13 20:18 ` Stefan Monnier
2006-11-14 12:27 ` Richard Stallman
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