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Re: eval-when-compile

From: Achim Gratz
Subject: Re: eval-when-compile
Date: Wed, 08 Aug 2012 20:51:18 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1 (gnu/linux)

PJ Weisberg writes:
> You know what you could do?
> ---
> (eval
>  (eval-when-compile
>    (if nil
>        '(defvar quoted-t "true")
>      '(defvar quoted-nil "false")))
> ---
> That'll compile to:
> ---
> (eval
>  '(defvar quoted-nil "false"))
> ---

Thanks.  I tried this and actually it compiles to just

(defvar quoted-nil "false")

as I expected my first variant to do.  I am not sure what the outer eval
is doing, though: it doesn't look like it is executed at compile-time,
so it must somehow be optimized away by the byte-compiler (some rule
that "(eval (quote <…>))" is identical to "<…>", perhaps?).

+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

SD adaptations for Waldorf Q V3.00R3 and Q+ V3.54R2:

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