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regex: match current GNU grep behavior

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These symbols have not matched GNU grep behavior for quite some time.
Fix prompted by Balazs Kezes bug report at: http://bugs.gnu.org/20974
* lib/regex.h (RE_SYNTAX_GREP, RE_SYNTAX_EGREP):
Change to match current GNU behavior.
Simplify by expressing it as differences from POSIX BREs and EREs.
(RE_SYNTAX_POSIX_EGREP): No longer differs from GNU behavior.
This commit is contained in:
Paul Eggert
2015-07-04 08:25:21 -07:00
parent 7a4daa4da6
commit 5a5a9388e9
2 changed files with 16 additions and 9 deletions
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10
ChangeLog
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@@ -1,3 +1,13 @@
2015-07-04 Paul Eggert <eggert@cs.ucla.edu>
regex: match current GNU grep behavior
These symbols have not matched GNU grep behavior for quite some time.
Fix prompted by Balazs Kezes bug report at: http://bugs.gnu.org/20974
* lib/regex.h (RE_SYNTAX_GREP, RE_SYNTAX_EGREP):
Change to match current GNU behavior.
Simplify by expressing it as differences from POSIX BREs and EREs.
(RE_SYNTAX_POSIX_EGREP): No longer differs from GNU behavior.
2015-07-03 Jim Meyering <meyering@fb.com>
set-permissions.c: adjust acl_from_mode's cpp guard

15
lib/regex.h
View File

@@ -244,19 +244,16 @@ extern reg_syntax_t re_syntax_options;
| RE_INVALID_INTERVAL_ORD)
# define RE_SYNTAX_GREP \
(RE_BK_PLUS_QM | RE_CHAR_CLASSES \
| RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS \
| RE_NEWLINE_ALT)
((RE_SYNTAX_POSIX_BASIC | RE_NEWLINE_ALT) \
& ~(RE_CONTEXT_INVALID_DUP | RE_DOT_NOT_NULL))
# define RE_SYNTAX_EGREP \
(RE_CHAR_CLASSES | RE_CONTEXT_INDEP_ANCHORS \
| RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE \
| RE_NEWLINE_ALT | RE_NO_BK_PARENS \
| RE_NO_BK_VBAR)
((RE_SYNTAX_POSIX_EXTENDED | RE_INVALID_INTERVAL_ORD | RE_NEWLINE_ALT) \
& ~(RE_CONTEXT_INVALID_OPS | RE_DOT_NOT_NULL))
/* POSIX grep -E behavior is no longer incompatible with GNU. */
# define RE_SYNTAX_POSIX_EGREP \
(RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES \
| RE_INVALID_INTERVAL_ORD)
RE_SYNTAX_EGREP
/* P1003.2/D11.2, section 4.20.7.1, lines 5078ff. */
# define RE_SYNTAX_ED RE_SYNTAX_POSIX_BASIC