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The zero-width assertions \` \' \b \B were parsed in a sloppy way so that a following postfix repetition operator could yield surprising results. For instance, "\\b*" would act as "\\b\\*", and "xy\\b*" would act as "\\(?:xy\\b\\)*". Except for \` and ^, any following postfix operator now applies to the zero-width assertion itself only, which is predictable and consistent with other assertions, if useless in practice. For historical compatibility, an operator character following \` and ^ always becomes a literal. (Bug#64128) * src/regex-emacs.c (regex_compile): Set `laststart` appropriately for each zero-width assertion instead of leaving it with whatever value it had before. Remove a redundant condition. * test/src/regex-emacs-tests.el (regexp-tests-zero-width-assertion-repetition): New test. * doc/lispref/searching.texi (Regexp Special): Say that repetition operators are not special after \`, and that they work as expected after other backslash escapes. * etc/NEWS: Announce. |
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This directory contains the architecture-independent files used by or with Emacs. This includes some text files of documentation for GNU Emacs or of interest to Emacs users, and the file of dumped docstrings for Emacs functions and variables. COPYRIGHT AND LICENSE INFORMATION FOR IMAGE FILES File: emacs.icon Author: Sun Microsystems, Inc Copyright (C) 1999, 2001-2023 Free Software Foundation, Inc. License: GNU General Public License version 3 or later (see COPYING)