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Diffstat (limited to 'doc/pcre2pattern.3')
| -rw-r--r-- | doc/pcre2pattern.3 | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/doc/pcre2pattern.3 b/doc/pcre2pattern.3 index 9430c6b..df95f5e 100644 --- a/doc/pcre2pattern.3 +++ b/doc/pcre2pattern.3 @@ -1,4 +1,4 @@ -.TH PCRE2PATTERN 3 "28 December 2019" "PCRE2 10.35" +.TH PCRE2PATTERN 3 "29 December 2019" "PCRE2 10.35" .SH NAME PCRE2 - Perl-compatible regular expressions (revised API) .SH "PCRE2 REGULAR EXPRESSION DETAILS" @@ -1643,6 +1643,7 @@ that succeeds is used. If the alternatives are within a group alternative in the group. . . +.\" HTML <a name="internaloptions"></a> .SH "INTERNAL OPTION SETTING" .rs .sp @@ -1901,11 +1902,19 @@ are permitted for groups with the same number, for example: (?|(?<AA>aa)|(?<AA>bb)) .sp The duplicate name constraint can be disabled by setting the PCRE2_DUPNAMES -option at compile time, or by the use of (?J) within the pattern. Duplicate -names can be useful for patterns where only one instance of the named capture -group can match. Suppose you want to match the name of a weekday, either as a -3-letter abbreviation or as the full name, and in both cases you want to -extract the abbreviation. This pattern (ignoring the line breaks) does the job: +option at compile time, or by the use of (?J) within the pattern, as described +in the section entitiled +.\" HTML <a href="#internaloptions"> +.\" </a> +"Internal Option Setting" +.\" +above. +.P +Duplicate names can be useful for patterns where only one instance of the named +capture group can match. Suppose you want to match the name of a weekday, +either as a 3-letter abbreviation or as the full name, and in both cases you +want to extract the abbreviation. This pattern (ignoring the line breaks) does +the job: .sp (?J) (?<DN>Mon|Fri|Sun)(?:day)?| @@ -3875,6 +3884,6 @@ Cambridge, England. .rs .sp .nf -Last updated: 28 December 2019 +Last updated: 29 December 2019 Copyright (c) 1997-2019 University of Cambridge. .fi |