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Re: byte-opt.el addition - optimize list of compile-time constants
From: |
Stefan Monnier |
Subject: |
Re: byte-opt.el addition - optimize list of compile-time constants |
Date: |
Wed, 08 Dec 2004 18:40:42 -0500 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/21.3.50 (gnu/linux) |
> (disassemble
> (lambda nil
> `(:a 1 :b 2
> :c ,#'(lambda nil (when (eq (following-char) ?\n) (forward-char 1))))))
[...]
> second place, byte-optimize-pure-func is called, but the optimization
> fails because a (function ...) form appears inside the arguments to
> list, which does not count as byte-compile-constp. This is the other
Hmm... we should probably update byte-compile-constp to accept
(function ...) just like it accepts (quote ...).
> problem I mentioned earlier - at the point at which the
> 'byte-optimizer function for list is called, the inner function has
> not yet been compiled, contrary to the general principle that the byte
> optimizer operates depth-first.
The "byte-optimizer" has two phases: one done before byte-compilation and
one after. The byte-optimize-pure-func is done before.
As for your particular problem, there's an easier solution:
(defun foo-aux nil (when (eq (following-char) ?\n) (forward-char 1))
...
(lambda nil
'(:a 1 :b 2 :c foo-aux))
-- Stefan
- byte-opt.el addition - optimize list of compile-time constants, Zack Weinberg, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Stefan Monnier, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Zack Weinberg, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants,
Stefan Monnier <=
- Re: byte-opt.el addition - optimize list of compile-time constants, Zack Weinberg, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Stefan Monnier, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Zack Weinberg, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Miles Bader, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Zack Weinberg, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Miles Bader, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Zack Weinberg, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Miles Bader, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Zack Weinberg, 2004/12/08
- Re: byte-opt.el addition - optimize list of compile-time constants, Stefan Monnier, 2004/12/09