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Documentation update.

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Philip.Hazel 2015-05-19 16:56:39 +00:00
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doc/pcre2pattern.3
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@ -1,4 +1,4 @@
.TH PCRE2PATTERN 3 "23 April 2015" "PCRE2 10.20" .TH PCRE2PATTERN 3 "19 May 2015" "PCRE2 10.20"
.SH NAME .SH NAME
PCRE2 - Perl-compatible regular expressions (revised API) PCRE2 - Perl-compatible regular expressions (revised API)
.SH "PCRE2 REGULAR EXPRESSION DETAILS" .SH "PCRE2 REGULAR EXPRESSION DETAILS"
@ -1491,7 +1491,8 @@ unset these options by preceding the letter with a hyphen, and a combined
setting and unsetting such as (?im-sx), which sets PCRE2_CASELESS and setting and unsetting such as (?im-sx), which sets PCRE2_CASELESS and
PCRE2_MULTILINE while unsetting PCRE2_DOTALL and PCRE2_EXTENDED, is also PCRE2_MULTILINE while unsetting PCRE2_DOTALL and PCRE2_EXTENDED, is also
permitted. If a letter appears both before and after the hyphen, the option is permitted. If a letter appears both before and after the hyphen, the option is
unset. unset. An empty options setting "(?)" is allowed. Needless to say, it has no
effect.
.P .P
The PCRE2-specific options PCRE2_DUPNAMES and PCRE2_UNGREEDY can be changed in The PCRE2-specific options PCRE2_DUPNAMES and PCRE2_UNGREEDY can be changed in
the same way as the Perl-compatible options by using the characters J and U the same way as the Perl-compatible options by using the characters J and U
@ -1520,11 +1521,19 @@ branch is abandoned before the option setting. This is because the effects of
option settings happen at compile time. There would be some very weird option settings happen at compile time. There would be some very weird
behaviour otherwise. behaviour otherwise.
.P .P
As a convenient shorthand, if any option settings are required at the start of
a non-capturing subpattern (see the next section), the option letters may
appear between the "?" and the ":". Thus the two patterns
.sp
(?i:saturday|sunday)
(?:(?i)saturday|sunday)
.sp
match exactly the same set of strings.
.P
\fBNote:\fP There are other PCRE2-specific options that can be set by the \fBNote:\fP There are other PCRE2-specific options that can be set by the
application when the compiling function is called. application when the compiling function is called. The pattern can contain
The pattern can contain special leading sequences such as (*CRLF) to override special leading sequences such as (*CRLF) to override what the application has
what the application has set or what has been defaulted. Details are given in set or what has been defaulted. Details are given in the section entitled
the section entitled
.\" HTML <a href="#newlineseq"> .\" HTML <a href="#newlineseq">
.\" </a> .\" </a>
"Newline sequences" "Newline sequences"
@ -3338,6 +3347,6 @@ Cambridge, England.
.rs .rs
.sp .sp
.nf .nf
Last updated: 23 April 2015 Last updated: 19 May 2015
Copyright (c) 1997-2015 University of Cambridge. Copyright (c) 1997-2015 University of Cambridge.
.fi .fi