From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: immerrr again Newsgroups: gmane.emacs.bugs Subject: bug#17862: 24.3; regexp-opt docstring is incorrect Date: Fri, 29 Jul 2016 06:57:37 +0300 Message-ID: References: <87zip19rm4.fsf@users.sourceforge.net> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary=089e010d7e9e5f22650538be40c6 X-Trace: ger.gmane.org 1469765356 18523 80.91.229.3 (29 Jul 2016 04:09:16 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 29 Jul 2016 04:09:16 +0000 (UTC) Cc: 17862@debbugs.gnu.org, Andreas Schwab To: npostavs@users.sourceforge.net Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Jul 29 06:09:06 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bSz6f-00047j-91 for geb-bug-gnu-emacs@m.gmane.org; Fri, 29 Jul 2016 06:09:05 +0200 Original-Received: from localhost ([::1]:57135 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bSz6Z-0003k9-3v for geb-bug-gnu-emacs@m.gmane.org; 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charset=UTF-8 Thank you for the review! Please, see my answers inline and an updated patch attached. On Fri, Jul 29, 2016 at 4:10 AM, wrote: > immerrr again writes: > >> +non-@code{nil} > > Should be just non-nil, I believe. > I was following the precedent set by other documentation in searching.texi. >> + the resulting regexp is surrounded by @samp{\(} and @samp{\)}. >> + >> +Otherwise the resulting regexp is surrounded by @samp{\(?:} and >> +@samp{\)}. > > This is not 100% accurate, here is a counterexample: > > (regexp-opt '("a" "b" "c")) ;=> "[abc]" > > Not sure how detailed we want to be about this is in the docs though. > Agreed, I think reference documentation must cover all cases. I have updated it. The description still seems concise but might have become confusing and might need an illustrative example like yours. >> >> This simplified definition of @code{regexp-opt} produces a >> regular expression which is equivalent to the actual value >> -(but not as efficient): >> +(but typically more efficient): > > "not as efficient" refers to the output of the simplified definition. > Right. The paragraph referring to "regexp-opt" got me confused, I have renamed the simplified version "simplified-regexp-opt" for clarity. >> >> @example >> (defun regexp-opt (strings &optional paren) >> - (let ((open-paren (if paren "\\(" "")) >> - (close-paren (if paren "\\)" ""))) >> + (let ((open-paren (make-open-paren paren)) >> + (close-paren (make-close-paren paren))) > > I'm not sure that adding these undefined make-{open,close}-paren > functions makes things any clearer. > I agree that adding "impenetrable definitions" might be unclear, but I'd argue that it's still an improvement because the equivalence statement is plain false now: - "words" and "symbol" keywords add special backslash characters around the result - if PAREN is nil, the result is still grouped (unless the strings can be represented as a character set, but that's not handled in the simplified version) I doubt we can put all the logic behind PAREN into the simplified version. I made an attempt to clarify the "impenetrable definitions" by their name, but if that's still unacceptable we might want to drop the "is equivalent to" part which is currently misleading. >> The returned regexp is typically more efficient than the equivalent regexp: >> >> - (let ((open (if PAREN \"\\\\(\" \"\")) (close (if PAREN \"\\\\)\" \"\"))) >> + (let ((open (make-open-paren PAREN)) (close (make-close-paren PAREN))) > > Same comment here. Same response here :) Cheers, immerrr --089e010d7e9e5f22650538be40c6 Content-Type: text/x-patch; charset=US-ASCII; name="0001-Fix-regexp-opt-documentation-bug-17862.patch" Content-Disposition: attachment; filename="0001-Fix-regexp-opt-documentation-bug-17862.patch" Content-Transfer-Encoding: base64 X-Attachment-Id: f_ir77u4bl0 RnJvbSAxY2Y1MDI2YjU2YjZiMWI1OGY4NDAxYzc2NDJkMDZhMjgwOWYxZTY1IE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBpbW1lcnJyIDxpbW1lcnJyQGdtYWlsLmNvbT4KRGF0ZTogU3Vu LCA3IEZlYiAyMDE2IDEyOjQ2OjM3ICswMzAwClN1YmplY3Q6IFtQQVRDSF0gRml4IHJlZ2V4cC1v cHQgZG9jdW1lbnRhdGlvbiAoYnVnICMxNzg2MikKCiogbGlzcC9lbWFjcy1saXNwL3JlZ2V4cC1v cHQuZWwgKHJlZ2V4cC1vcHQpOiB1cGRhdGUgUEFSRU4gZG9jCgoqIGRvYy9saXNwcmVmL3NlYXJj aGluZy50ZXhpIChSZWdleHAgRnVuY3Rpb25zKTogdXBkYXRlIFBBUkVOIGRvYwotLS0KIGRvYy9s aXNwcmVmL3NlYXJjaGluZy50ZXhpICAgIHwgNDMgKysrKysrKysrKysrKysrKysrKysrKysrKysr Ky0tLS0tLS0tLS0tLS0tLQogbGlzcC9lbWFjcy1saXNwL3JlZ2V4cC1vcHQuZWwgfCA0MSArKysr 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