From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?iso-8859-1?Q?Court=E8s?=) Newsgroups: gmane.lisp.guile.devel Subject: Hierarchical name space Date: Wed, 31 Mar 2010 22:42:26 +0200 Message-ID: <87k4ssusst.fsf@gnu.org> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1270068172 25869 80.91.229.12 (31 Mar 2010 20:42:52 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 31 Mar 2010 20:42:52 +0000 (UTC) To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Wed Mar 31 22:42:48 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 1Nx4kR-0004oo-9R for guile-devel@m.gmane.org; Wed, 31 Mar 2010 22:42:47 +0200 Original-Received: from localhost ([127.0.0.1]:38006 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Nx4kQ-0001i2-QU for guile-devel@m.gmane.org; Wed, 31 Mar 2010 16:42:46 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Nx4kO-0001hw-Fn for guile-devel@gnu.org; Wed, 31 Mar 2010 16:42:44 -0400 Original-Received: from [140.186.70.92] (port=60090 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Nx4kM-0001ho-5c for guile-devel@gnu.org; Wed, 31 Mar 2010 16:42:43 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1Nx4kK-0003DW-NK for guile-devel@gnu.org; Wed, 31 Mar 2010 16:42:42 -0400 Original-Received: from lo.gmane.org ([80.91.229.12]:33263) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Nx4kK-0003DN-Gj for guile-devel@gnu.org; Wed, 31 Mar 2010 16:42:40 -0400 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1Nx4kH-0004lJ-CM for guile-devel@gnu.org; Wed, 31 Mar 2010 22:42:37 +0200 Original-Received: from acces.bordeaux.inria.fr ([193.50.110.5]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 31 Mar 2010 22:42:37 +0200 Original-Received: from ludo by acces.bordeaux.inria.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 31 Mar 2010 22:42:37 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 32 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: acces.bordeaux.inria.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 11 Germinal an 218 de la =?iso-8859-1?Q?R=E9volution?= X-PGP-Key-ID: 0xEA52ECF4 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 83C4 F8E5 10A3 3B4C 5BEA D15D 77DD 95E2 EA52 ECF4 X-OS: x86_64-unknown-linux-gnu User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) Cancel-Lock: sha1:ZzqQ3b0oGs++H75krzSdaM7YAwM= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) 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:10131 Archived-At: Hey, Andy Wingo writes: > Also in every module that has submodules, like (language tree-il) and > (language tree-il compile-glil), the "supermodule" has a binding for the > submodule. Do a (module-ref (resolve-module '(ice-9)) 'threads) > sometime. I think I found a possible use case for the hierarchical name space. :-) Suppose we want something like PLaneT or Eggs, let’s call it GUMM (Guile’s Unified Module Machinery). Ideally, we’d want to be able to write this: (use-modules (gumm foo bar)) Such that: - If a (foo bar) module exists locally, it is used - else if ftp://example.org/gumm/foo/bar.scm exists it is downloaded and ‘resolve-interface’d - else an error is raised. The hierarchical name space allows the (gumm) module to have a lazy binder procedure that will catch all such lookups so that it can actually do its job. QED? Thanks, Ludo’.