From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Andy Wingo Newsgroups: gmane.lisp.guile.user Subject: Re: char-set-contains? and # Date: Sun, 30 May 2010 20:08:59 +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 1275244149 10806 80.91.229.12 (30 May 2010 18:29:09 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sun, 30 May 2010 18:29:09 +0000 (UTC) Cc: guile-user@gnu.org To: No Itisnt Original-X-From: guile-user-bounces+guile-user=m.gmane.org@gnu.org Sun May 30 20:29:08 2010 connect(): No such file or directory Return-path: Envelope-to: guile-user@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 1OInFz-0003Uu-GY for guile-user@m.gmane.org; Sun, 30 May 2010 20:29:07 +0200 Original-Received: from localhost ([127.0.0.1]:58651 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OInFy-0006S0-TT for guile-user@m.gmane.org; Sun, 30 May 2010 14:29:06 -0400 Original-Received: from [140.186.70.92] (port=34759 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OInFt-0006Rt-Gd for guile-user@gnu.org; Sun, 30 May 2010 14:29:02 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OInFs-00064Y-BG for guile-user@gnu.org; Sun, 30 May 2010 14:29:01 -0400 Original-Received: from a-pb-sasl-quonix.pobox.com ([208.72.237.25]:34782 helo=sasl.smtp.pobox.com) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OInFs-00064L-8a for guile-user@gnu.org; Sun, 30 May 2010 14:29:00 -0400 Original-Received: from sasl.smtp.pobox.com (unknown [127.0.0.1]) by a-pb-sasl-quonix.pobox.com (Postfix) with ESMTP id A4C35B7335; Sun, 30 May 2010 14:28:58 -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=CVOPfvW4DOvtA5u7pp86TDBl8Tc=; b=KWMPvw 7B3Fvs34hu6ePFx9FY8A1NuGVuC1aPZxZFix2Vp3+MFBrnq0bWEoH0LEr5DqZ4sQ 3ifMuOioKBLdFh7T6tntAdGo+K7Dly8iKb3epi8BLxKMudRcRvPqQuGwwG05PNZl JN4uUIb1TqySRyNFTt3KKFSU4WxLg0EUZdG/A= 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=q2pHpT+k7U7ZE0wxlnufUFbGwRCwm4sK 5yITgB5nZwWAQ8kqomKHBecuk5u1tUfxzJL8xw8A9SJeEsuRkVBNa+2s/i5pxfkH esFgRiskVDa0kHzy00Xwe0ZXG0AOzt4ikVHPYlWpnmfEJsVren6wnoh8TZmYuSuL VqQCpu4LyDA= Original-Received: from a-pb-sasl-quonix. (unknown [127.0.0.1]) by a-pb-sasl-quonix.pobox.com (Postfix) with ESMTP id 8DB60B7334; Sun, 30 May 2010 14:28:57 -0400 (EDT) Original-Received: from unquote (unknown [82.123.108.241]) (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 17621B7333; Sun, 30 May 2010 14:28:55 -0400 (EDT) In-Reply-To: (No Itisnt's message of "Fri, 28 May 2010 15:52:00 -0500") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.92 (gnu/linux) X-Pobox-Relay-ID: 35B6112E-6C19-11DF-80E2-6730EE7EF46B-02397024!a-pb-sasl-quonix.pobox.com X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-BeenThere: guile-user@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General Guile related discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-user-bounces+guile-user=m.gmane.org@gnu.org Errors-To: guile-user-bounces+guile-user=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.user:7810 Archived-At: Hi, On Fri 28 May 2010 22:52, No Itisnt writes: > R5RS specifies that character predicates should return #f, One may interpret the language of the R5RS to permit raising an error if the argument is not a character. Same with the R6RS. This is the tack that Guile has taken. For example, what would you have Guile do here: (even? #f) => ? (char-whitespace? 42) => ? > The reason it bothers me is because it makes it cumbersome to deal > with input from a port. True; but it's just how it is, I think. The EOF object is not a character. Regards, Andy -- http://wingolog.org/