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Documentation update.

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Philip.Hazel 2017-04-14 12:55:45 +00:00
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doc/pcre2api.3
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@ -1,4 +1,4 @@
.TH PCRE2API 3 "11 April 2017" "PCRE2 10.30"
.TH PCRE2API 3 "14 April 2017" "PCRE2 10.30"
.SH NAME
PCRE2 - Perl-compatible regular expressions (revised API)
.sp
@ -1301,9 +1301,25 @@ documentation.
PCRE2_ENDANCHORED
.sp
If this bit is set, the end of any pattern match must be right at the end of
the string being searched (the "subject string"). This effect can also be
the string being searched (the "subject string"). If the pattern match
succeeds by reaching (*ACCEPT), but does not reach the end of the subject, the
match fails at the current starting point. For unanchored patterns, a new match
is then tried at the next starting point. However, if the match succeeds by
reaching the end of the pattern, but not the end of the subject, backtracking
occurs and an alternative match may be found. Consider these two patterns:
.sp
.(*ACCEPT)|..
.|..
.sp
If matched against "abc" with PCRE2_ENDANCHORED set, the first matches "c"
whereas the second matches "bc". The effect of PCRE2_ENDANCHORED can also be
achieved by appropriate constructs in the pattern itself, which is the only way
to do it in Perl.
.P
For DFA matching with \fBpcre2_dfa_match()\fP, PCRE2_ENDANCHORED applies only
to the first (that is, the longest) matched string. Other parallel matches,
which are necessarily substrings of the first one, must obviously end before
the end of the subject.
.sp
PCRE2_EXTENDED
.sp
@ -3379,6 +3395,6 @@ Cambridge, England.
.rs
.sp
.nf
Last updated: 11 April 2017
Last updated: 14 April 2017
Copyright (c) 1997-2017 University of Cambridge.
.fi