From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Andy Wingo Newsgroups: gmane.lisp.guile.devel Subject: Re: expression Date: Thu, 24 Jun 2010 15:01:44 +0200 Message-ID: References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: dough.gmane.org 1277384479 13133 80.91.229.12 (24 Jun 2010 13:01:19 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 24 Jun 2010 13:01:19 +0000 (UTC) Cc: guile-devel@gnu.org, No Itisnt To: Michael Lucy Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Thu Jun 24 15:01:17 2010 Return-path: Envelope-to: guile-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ORm3P-0004Sj-Ta for guile-devel@m.gmane.org; Thu, 24 Jun 2010 15:01:16 +0200 Original-Received: from localhost ([127.0.0.1]:60764 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1ORm3P-0003Bi-Bv for guile-devel@m.gmane.org; Thu, 24 Jun 2010 09:01:15 -0400 Original-Received: from [140.186.70.92] (port=36058 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1ORm30-0003AZ-5m for guile-devel@gnu.org; Thu, 24 Jun 2010 09:00:51 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1ORm2y-00008G-Oi for guile-devel@gnu.org; Thu, 24 Jun 2010 09:00:50 -0400 Original-Received: from a-pb-sasl-quonix.pobox.com ([208.72.237.25]:61005 helo=sasl.smtp.pobox.com) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1ORm2y-0008Hl-Mr for guile-devel@gnu.org; Thu, 24 Jun 2010 09:00:48 -0400 Original-Received: from sasl.smtp.pobox.com (unknown [127.0.0.1]) by a-pb-sasl-quonix.pobox.com (Postfix) with ESMTP id 1B376BE44C; Thu, 24 Jun 2010 08:59:34 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=from:to:cc :subject:references:date:in-reply-to:message-id:mime-version :content-type; s=sasl; bh=1y77wGzDIwyu3O5Bb5owinbrY1s=; b=Oa4U3i T9I3wB5tGlLrxyoy2ck8VUvFIlxpW66FtnCTg5wKXbohqCp4d6dpfB9oQOVvtqJx qi+cdpjOqj/vBjCrkaSYiAfIaZCCwuS7lgLifamJPBbxRhrpgkBgWvyLjDFQc0V6 lfw6l3huV97lOprC+PLhkBvCfTXfckk/IhTT4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=from:to:cc :subject:references:date:in-reply-to:message-id:mime-version :content-type; q=dns; s=sasl; b=ZSuNlwcbbiL07P7gFM14fvReKNQHJt2f XwG11wdngjnUYOC2SIywk3SyeNptnP90KxudAHLTIhfDwvek9RZJ8+yUeURjIyVq BiLgE/fvI92487khqIFzIAQiOU+0x7+dmymNmXdmVskI2IjMAONv/rImQedJEuYd OdXdJ3FHtNs= Original-Received: from a-pb-sasl-quonix. (unknown [127.0.0.1]) by a-pb-sasl-quonix.pobox.com (Postfix) with ESMTP id E6F50BE44B; Thu, 24 Jun 2010 08:59:31 -0400 (EDT) Original-Received: from unquote (unknown [83.32.68.226]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by a-pb-sasl-quonix.pobox.com (Postfix) with ESMTPSA id AF809BE446; Thu, 24 Jun 2010 08:59:28 -0400 (EDT) In-Reply-To: (Michael Lucy's message of "Wed, 23 Jun 2010 18:23:45 -0500") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.92 (gnu/linux) X-Pobox-Relay-ID: 54C1B566-7F90-11DF-88BE-9056EE7EF46B-02397024!a-pb-sasl-quonix.pobox.com X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.devel:10561 Archived-At: Hi Michael, On Thu 24 Jun 2010 01:23, Michael Lucy writes: > scheme@(guile-user)> ,c (begin (set! x 1) *unspecified*) > Disassembly of #: > > 0 (assert-nargs-ee/locals 0) > 2 (make-int8:1) ;; 1 > 3 (load-symbol "x") ;; x > 8 (link-now) > 9 (variable-set) > 10 (load-symbol "*unspecified*") ;; *unspecified* > 27 (link-now) > 28 (variable-ref) > 29 (return) In current Guile, *unspecified* is actually a macro, allowing the compiler to do its job better: scheme@(guile-user)> ,c (begin (set! x 1) *unspecified*) :1:10: warning: possibly unbound variable `x' Disassembly of #: 0 (assert-nargs-ee/locals 0) 2 (make-int8:1) ;; 1 3 (load-symbol "x") ;; x 8 (link-now) 9 (variable-set) 10 (void) 11 (return) Andy -- http://wingolog.org/