Documentation update.
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Philip.Hazel
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.TH PCRE2_GET_MARK 3 "24 October 2014" "PCRE2 10.00"
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.TH PCRE2_GET_MARK 3 "13 October 2017" "PCRE2 10.31"
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.SH NAME
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PCRE2 - Perl-compatible regular expressions (revised API)
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.SH SYNOPSIS
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@ -14,11 +14,14 @@ PCRE2 - Perl-compatible regular expressions (revised API)
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.rs
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.sp
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After a call of \fBpcre2_match()\fP that was passed the match block that is
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this function's argument, this function returns a pointer to the last (*MARK)
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name that was encountered. The name is zero-terminated, and is within the
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compiled pattern. If no (*MARK) name is available, NULL is returned. A (*MARK)
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name may be available after a failed match or a partial match, as well as after
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a successful one.
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this function's argument, this function returns a pointer to the last (*MARK),
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(*PRUNE), or (*THEN) name that was encountered during the matching process. The
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name is zero-terminated, and is within the compiled pattern. The length of the
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name is in the preceding code unit. If no name is available, NULL is returned.
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.P
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After a successful match, the name that is returned is the last one on the
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matching path. After a failed match or a partial match, the last encountered
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name is returned.
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.P
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There is a complete description of the PCRE2 native API in the
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.\" HREF
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@ -1,4 +1,4 @@
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.TH PCRE2API 3 "25 September 2017" "PCRE2 10.31"
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.TH PCRE2API 3 "13 October 2017" "PCRE2 10.31"
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.SH NAME
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PCRE2 - Perl-compatible regular expressions (revised API)
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.sp
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@ -2717,24 +2717,27 @@ appropriate circumstances. If they are called at other times, the result is
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undefined.
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.P
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After a successful match, a partial match (PCRE2_ERROR_PARTIAL), or a failure
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to match (PCRE2_ERROR_NOMATCH), a (*MARK) name may be available, and
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\fBpcre2_get_mark()\fP can be called. It returns a pointer to the
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zero-terminated name, which is within the compiled pattern. Otherwise NULL is
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returned. The length of the (*MARK) name (excluding the terminating zero) is
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stored in the code unit that preceeds the name. You should use this instead of
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relying on the terminating zero if the (*MARK) name might contain a binary
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zero.
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to match (PCRE2_ERROR_NOMATCH), a (*MARK), (*PRUNE), or (*THEN) name may be
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available. The function \fBpcre2_get_mark()\fP can be called to access this
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name. The same function applies to all three verbs. It returns a pointer to the
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zero-terminated name, which is within the compiled pattern. If no name is
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available, NULL is returned. The length of the name (excluding the terminating
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zero) is stored in the code unit that precedes the name. You should use this
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length instead of relying on the terminating zero if the name might contain a
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binary zero.
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.P
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After a successful match, the (*MARK) name that is returned is the
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last one encountered on the matching path through the pattern. After a "no
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match" or a partial match, the last encountered (*MARK) name is returned. For
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example, consider this pattern:
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After a successful match, the name that is returned is the last (*MARK),
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(*PRUNE), or (*THEN) name encountered on the matching path through the pattern.
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Instances of (*PRUNE) and (*THEN) without names are ignored. Thus, for example,
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if the matching path contains (*MARK:A)(*PRUNE), the name "A" is returned.
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After a "no match" or a partial match, the last encountered name is returned.
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For example, consider this pattern:
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.sp
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^(*MARK:A)((*MARK:B)a|b)c
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.sp
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When it matches "bc", the returned mark is A. The B mark is "seen" in the first
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When it matches "bc", the returned name is A. The B mark is "seen" in the first
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branch of the group, but it is not on the matching path. On the other hand,
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when this pattern fails to match "bx", the returned mark is B.
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when this pattern fails to match "bx", the returned name is B.
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.P
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After a successful match, a partial match, or one of the invalid UTF errors
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(for example, PCRE2_ERROR_UTF8_ERR5), \fBpcre2_get_startchar()\fP can be
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@ -3135,12 +3138,12 @@ length is in code units, not bytes.
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In the replacement string, which is interpreted as a UTF string in UTF mode,
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and is checked for UTF validity unless the PCRE2_NO_UTF_CHECK option is set, a
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dollar character is an escape character that can specify the insertion of
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characters from capturing groups or (*MARK) items in the pattern. The following
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forms are always recognized:
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characters from capturing groups or (*MARK), (*PRUNE), or (*THEN) items in the
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pattern. The following forms are always recognized:
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.sp
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$$ insert a dollar character
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$<n> or ${<n>} insert the contents of group <n>
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$*MARK or ${*MARK} insert the name of the last (*MARK) encountered
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$*MARK or ${*MARK} insert a (*MARK), (*PRUNE), or (*THEN) name
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.sp
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Either a group number or a group name can be given for <n>. Curly brackets are
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required only if the following character would be interpreted as part of the
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@ -3148,15 +3151,19 @@ number or name. The number may be zero to include the entire matched string.
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For example, if the pattern a(b)c is matched with "=abc=" and the replacement
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string "+$1$0$1+", the result is "=+babcb+=".
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.P
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The facility for inserting a (*MARK) name can be used to perform simple
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simultaneous substitutions, as this \fBpcre2test\fP example shows:
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$*MARK inserts the name from the last encountered (*MARK), (*PRUNE), or (*THEN)
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on the matching path that has a name. (*MARK) must always include a name, but
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(*PRUNE) and (*THEN) need not. For example, in the case of (*MARK:A)(*PRUNE)
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the name inserted is "A", but for (*MARK:A)(*PRUNE:B) the relevant name is "B".
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This facility can be used to perform simple simultaneous substitutions, as this
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\fBpcre2test\fP example shows:
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.sp
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/(*:pear)apple|(*:orange)lemon/g,replace=${*MARK}
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/(*MARK:pear)apple|(*MARK:orange)lemon/g,replace=${*MARK}
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apple lemon
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2: pear orange
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.sp
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As well as the usual options for \fBpcre2_match()\fP, a number of additional
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options can be set in the \fIoptions\fP argument.
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options can be set in the \fIoptions\fP argument of \fBpcre2_substitute()\fP.
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.P
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PCRE2_SUBSTITUTE_GLOBAL causes the function to iterate over the subject string,
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replacing every matching substring. If this is not set, only the first matching
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@ -3573,6 +3580,6 @@ Cambridge, England.
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.rs
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.sp
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.nf
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Last updated: 25 September 2017
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Last updated: 13 October 2017
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Copyright (c) 1997-2017 University of Cambridge.
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.fi
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