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| author | Jim Meyering <meyering@fb.com> | 2023-03-18 23:25:03 -0700 |
|---|---|---|
| committer | Jim Meyering <meyering@meta.com> | 2023-03-19 13:36:23 -0700 |
| commit | 98ee05b4ddfee5c1db2248bdb060a2cd64bf75fa (patch) | |
| tree | 3f698eb54e1cd35347d16ad14270261e3c0a95d3 /doc | |
| parent | 99330c2b1dc8b619dff8a5a6a35f524d382508c8 (diff) | |
| download | grep-98ee05b4ddfee5c1db2248bdb060a2cd64bf75fa.tar.gz | |
grep: -P (--perl-regexp) \D once again works like [^0-9]
* NEWS: Mention \D, too.
* doc/grep.texi: Likewise
* src/pcresearch.c (pcre_pattern_expand_backslash_d): Handle \D.
Also, ifdef-out this new function and its call site when not needed.
* tests/pcre-ascii-digits: Test \D, too.
Tighten one test by using returns_ 1.
Add comments and tests that work only with 10.43 and newer.
Paul Eggert raised the issue of \D in https://bugs.gnu.org/62267#8
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/grep.texi | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/doc/grep.texi b/doc/grep.texi index 8a0aef51..7a00adda 100644 --- a/doc/grep.texi +++ b/doc/grep.texi @@ -1144,21 +1144,15 @@ combined with the @option{-z} (@option{--null-data}) option, and note that For documentation, refer to @url{https://www.pcre.org/}, with these caveats: @itemize @item -@samp{\d} matches only the ten ASCII digits, regardless of locale. +@samp{\d} matches only the ten ASCII digits +(and @samp{\D} matches the complement), regardless of locale. Use @samp{\p@{Nd@}} to also match non-ASCII digits. -When @command{grep} is built with PCRE2 10.42 and earlier, @samp{\d} -ignores in-regexp directives like @samp{(?aD)} and matches only ASCII -digits regardless of these directives. However, later versions of -PCRE2 likely will fix this, and the plan is for @command{grep} to -respect those directives if possible. -@c Using PCRE2 git commit pcre2-10.40-112-g6277357, this demonstrates -@c the equivalent of how grep could use PCRE2_EXTRA_ASCII_BSD to make \d's -@c ASCII-only behavior the default: -@c $ LC_ALL=en_US.UTF-8 ./pcre2grep -u '(?aD)^\d+' <<< '٠١٢٣٤٥٦٧٨٩' -@c [Exit 1] -@c $ LC_ALL=en_US.UTF-8 ./pcre2grep -u '^\d+' <<< '٠١٢٣٤٥٦٧٨٩' -@c ٠١٢٣٤٥٦٧٨٩ +When @command{grep} is built with PCRE2 10.42 and earlier, +@samp{\d} and @samp{\D} ignore in-regexp directives like @samp{(?aD)} +and work like @samp{[0-9]} and @samp{[^0-9]} respectively. +However, later versions of PCRE2 likely will fix this, +and the plan is for @command{grep} to respect those directives if possible. @item Although PCRE tracks the syntax and semantics of Perl's regular |