diff options
Diffstat (limited to 'doc/pcre2compat.3')
| -rw-r--r-- | doc/pcre2compat.3 | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/doc/pcre2compat.3 b/doc/pcre2compat.3 index 862d28d..026e664 100644 --- a/doc/pcre2compat.3 +++ b/doc/pcre2compat.3 @@ -22,12 +22,12 @@ that the next three characters are not "a". It just asserts that the next character is not "a" three times (in principle; PCRE2 optimizes this to run the assertion just once). Perl allows some repeat quantifiers on other assertions, for example, \eb* (but not \eb{3}, though oddly it does allow ^{3}), but these -do not seem to have any use. PCRE2 does not allow any kind of quantifier on +do not seem to have any use. PCRE2 does not allow any kind of quantifier on non-lookaround assertions. .P 3. Capture groups that occur inside negative lookaround assertions are counted, but their entries in the offsets vector are set only when a negative assertion -is a condition that has a matching branch (that is, the condition is false). +is a condition that has a matching branch (that is, the condition is false). Perl may set such capture groups in other circumstances. .P 4. The following Perl escape sequences are not supported: \eF, \el, \eL, \eu, @@ -72,7 +72,7 @@ other character. Note the following examples: \eQA\eB\eE A\eB A\eB \eQ\e\eE \e \e\eE .sp -The \eQ...\eE sequence is recognized both inside and outside character classes +The \eQ...\eE sequence is recognized both inside and outside character classes by both PCRE2 and Perl. .P 7. Fairly obviously, PCRE2 does not support the (?{code}) and (??{code}) @@ -132,8 +132,8 @@ always matches an upper case letter. I think Perl has changed in this respect; in the release at the time of writing (5.32), \ep{Lu} and \ep{Ll} match all letters, regardless of case, when case independence is specified. .P -16. From release 5.32.0, Perl locks out the use of \eK in lookaround -assertions. In PCRE2, \eK is acted on when it occurs in positive assertions, +16. From release 5.32.0, Perl locks out the use of \eK in lookaround +assertions. In PCRE2, \eK is acted on when it occurs in positive assertions, but is ignored in negative assertions. .P 17. PCRE2 provides some extensions to the Perl regular expression facilities. |