From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.bugs Subject: bug#31584: 27.0.50; Document again what match re-search-backward finds Date: Thu, 24 May 2018 23:59:08 +0200 Message-ID: <87wovsemvn.fsf@web.de> References: <87in7cg2qw.fsf@web.de> <87wovsg27f.fsf@ericabrahamsen.net> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1527199089 19772 195.159.176.226 (24 May 2018 21:58:09 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 24 May 2018 21:58:09 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: 31584@debbugs.gnu.org To: Eric Abrahamsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu May 24 23:58:05 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fLyFJ-00053u-3y for geb-bug-gnu-emacs@m.gmane.org; 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Thu, 24 May 2018 23:59:09 +0200 In-Reply-To: <87wovsg27f.fsf@ericabrahamsen.net> (Eric Abrahamsen's message of "Thu, 24 May 2018 14:42:44 -0700") X-Provags-ID: V03:K1:qCfqo0qIOhFlYqK8qTgfmR9Ku7Y753v3JQdm1iLfFoGGzgv6UTX t4dLAco3z5nDkZzjR13d3Psk1QodqCOvVRVCtukVTMkp6wmqwcpI9J0GZ0FzfDUMzbhzcfO 1Sj5cGte8pqdYBmbqG8yRYA6jKtVtLakcqN5Ka59qpQzFnfwkYt48OAT7NzRDYQ0qBydFR+ IbVoHG60S7HkDupFFwrCg== X-UI-Out-Filterresults: notjunk:1;V01:K0:ASBZ9YKWZvU=:8hluw3/u3EneyxalVfWXBH VLZMRCUXr4N7PMw7/rI4QTBSxyxZY1SGKtFtnSuOTBo//TAnR7Ddel3frZ9XYZXzCzBmqXYI9 dAddPOyRd41sOOZ47EBYhjkLE8peyFv7pmBtWp8P8gRsAxsl/9+ViepyNZD9EWhLX9nEm0/5l hy19PyfyO6hmJhff7G3uhaNSEwI9qKKgRsygIdOkiAhdVHJUW1NZ6hqfiw5UeU0krDfiLFZlE xxzJNPiN+KzTtW8AmO+FShSitAXoEbjGcJSOV/yUoz1WepgDu6YGpbirWQMMKJ4QKifOjLPnJ xFPgSCBffjf+D9rD+huSnimwztXCmPq2BtPOIMC9Yposw+mm3XBJDxiu0dizmZGYXaFM215Pe 9e5iPXg37WBGrwHJNWaR1nZ41/YWqWsy1OCpLkBZnaoVXt4Yz8MmNO4H4kw1PyNLDtXz+MHA1 dBuxyrYDNhyFo+jIJUu52RJYuZL4/GwPw75dsLaofk12YZZHldveV4AbkCNPzD55brvmx3AfD zV8LpFPWCXjaHhTU+wW/bNFaIH5tQh92anBNLeiTamrydwlrLYCrL72DhS0x8PBsq7mGmlKZw ClNI2IfzJOqhVENsaPxq2di/Y4rV7rcAL49rltcxpB07eySRITvThvUPoXVS7N1QFyHIcVgjt x9ZH6xOgWX6b9pxQEX7p6n6eCYFKf9i7N3qAFEzPpDKs9fvFYN3S9/7WB2g7s9TDs+rN6WnB7 QnviAafYOODvxbP9dFAYksNDNNbbTOjZjZmSqwnBXD7Z+e7idCOohYJWNDByW2dFiQ96H+xM X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:146503 Archived-At: Eric Abrahamsen writes: > Michael Heidegger writes: FWIW, my last name is "Heerdegen" AFAIK. > > The match found is the one starting last in the buffer > > and yet ending before the origin of the search. > I've been bitten by this before. I'm sure the sentence you cite is > correct, but I would suggest something more explicit about backwards > searches. The most useful thing I could have read when I was wondering > why this didn't work would be something like: "re-search-backward always > behaves "non-greedily", i.e., it will find the shortest match before > point". > > That might not be technically correct, but those are the terms that > would have made sense to me: in particular, the "*" token is supposed to > be "greedy", so why isn't it greedy backwards? This doesn't explain why > it isn't, but it would have explicitly told me that it wouldn't be. Without thinking long about it, I guess the above definition, and greedy operators behaving non-greedy for backwards search, could be equivalent, more or less. Michael.