From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: pjb@informatimago.com (Pascal J. Bourguignon) Newsgroups: gmane.emacs.help Subject: Re: Sending code to *scheme* buffer and reading the result Date: Mon, 10 Aug 2009 19:43:33 +0200 Organization: Informatimago Message-ID: <871vnj5zui.fsf@galatea.local> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1249929655 1622 80.91.229.12 (10 Aug 2009 18:40:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 10 Aug 2009 18:40:55 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Aug 10 20:40:48 2009 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1MaZna-0001kD-DJ for geh-help-gnu-emacs@m.gmane.org; Mon, 10 Aug 2009 20:40:46 +0200 Original-Received: from localhost ([127.0.0.1]:59055 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MaZnZ-0006wY-HT for geh-help-gnu-emacs@m.gmane.org; Mon, 10 Aug 2009 14:40:45 -0400 Original-Path: news.stanford.edu!headwall.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 33 Original-X-Trace: individual.net N80BCfZU+mx3HPhZ2WYPrANYlsUfAzqZ87I5eE4c2bzuuHEohR Cancel-Lock: sha1:OGU2MmZmMmU4NDE5NjJhM2E5NDc3MGQzNWM2MjlhNjJmZTZhMDQ0YQ== sha1:py+IgP4cDMdWEMGh06eh2s1Digw= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en X-Disabled: X-No-Archive: no User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/22.3 (darwin) Original-Xref: news.stanford.edu gnu.emacs.help:171859 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:67032 Archived-At: Eduardo Cavazos writes: > Hello, > > Emacs' scheme-mode has code for sending a sexp to the *scheme* buffer. > But, I need to code to send an sexp, and return the result, as an > sexp. I'm sure somebody has done this before and I'd like to borrow > that code if possible. I know about Jao's awesome Geiser mode and I > could factor out the relevant parts. Just wondering about other > possibilities. The problem is that the emacs lisp reader cannot understand scheme syntax: (condition-case err (read-from-string "#f") (error (format "%S" err))) --> "(invalid-read-syntax \"#\")" So you will need to write a scheme reader function in emacs lisp. In addition, the comint-sent-* functions that are used to communicate with the scheme inferior process deal with strings, not sexps, so you will have to write a scheme print function, to convert some kind of emacs lisp sexp into strings readable by scheme. (scheme-read-from-string "#f") --> (scheme-boolean nil) (scheme-prin1-to-string '(scheme-boolean nil)) -> "#f" Using these functions it will be trivial to wrap the comint functions (and process filter output) to get a sexp-based FFI between emacs lisp and scheme. -- __Pascal Bourguignon__