Documentation update.
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Philip.Hazel
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@ -19,7 +19,7 @@ SYNOPSIS
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<b>#include <pcre2.h></b>
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</P>
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<P>
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<b>const unsigned char *pcre2_maketables(pcre22_general_context *<i>gcontext</i>);</b>
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<b>const unsigned char *pcre2_maketables(pcre2_general_context *<i>gcontext</i>);</b>
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</P>
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<br><b>
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DESCRIPTION
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@ -1331,9 +1331,26 @@ documentation.
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PCRE2_ENDANCHORED
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</pre>
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If this bit is set, the end of any pattern match must be right at the end of
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the string being searched (the "subject string"). This effect can also be
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the string being searched (the "subject string"). If the pattern match
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succeeds by reaching (*ACCEPT), but does not reach the end of the subject, the
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match fails at the current starting point. For unanchored patterns, a new match
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is then tried at the next starting point. However, if the match succeeds by
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reaching the end of the pattern, but not the end of the subject, backtracking
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occurs and an alternative match may be found. Consider these two patterns:
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<pre>
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.(*ACCEPT)|..
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.|..
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</pre>
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If matched against "abc" with PCRE2_ENDANCHORED set, the first matches "c"
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whereas the second matches "bc". The effect of PCRE2_ENDANCHORED can also be
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achieved by appropriate constructs in the pattern itself, which is the only way
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to do it in Perl.
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</P>
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<P>
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For DFA matching with <b>pcre2_dfa_match()</b>, PCRE2_ENDANCHORED applies only
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to the first (that is, the longest) matched string. Other parallel matches,
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which are necessarily substrings of the first one, must obviously end before
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the end of the subject.
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<pre>
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PCRE2_EXTENDED
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</pre>
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@ -3327,7 +3344,7 @@ Cambridge, England.
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</P>
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<br><a name="SEC42" href="#TOC1">REVISION</a><br>
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<P>
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Last updated: 11 April 2017
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Last updated: 14 April 2017
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<br>
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Copyright © 1997-2017 University of Cambridge.
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<br>
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@ -206,8 +206,8 @@ callouts such as the example above are obeyed.
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<br><a name="SEC4" href="#TOC1">THE CALLOUT INTERFACE</a><br>
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<P>
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During matching, when PCRE2 reaches a callout point, if an external function is
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set in the match context, it is called. This applies to both normal and DFA
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matching. The first argument to the callout function is a pointer to a
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provided in the match context, it is called. This applies to both normal and
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DFA matching. The first argument to the callout function is a pointer to a
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<b>pcre2_callout</b> block. The second argument is the void * callout data that
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was supplied when the callout was set up by calling <b>pcre2_set_callout()</b>
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(see the
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@ -276,7 +276,7 @@ callout.
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</P>
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<P>
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The <i>offset_vector</i> field is a pointer to a vector of capturing offsets
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(the "ovector"). You may read certain elements in this vector, but you must not
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(the "ovector"). You may read the elements in this vector, but you must not
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change any of them.
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</P>
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<P>
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@ -300,9 +300,10 @@ for example, when the callout in the pattern ((a)(b))(?C2) is taken,
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The contents of ovector[2] to ovector[<capture_top>*2-1] can be inspected in
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order to extract substrings that have been matched so far, in the same way as
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extracting substrings after a match has completed. The values in ovector[0] and
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ovector[1] are undefined and should not be used in any way. Substrings that
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have not been captured (but whose numbers are less than <i>capture_top</i>) have
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both of their ovector slots set to PCRE2_UNSET.
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ovector[1] are always PCRE2_UNSET because the match is by definition not
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complete. Substrings that have not been captured but whose numbers are less
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than <i>capture_top</i> also have both of their ovector slots set to
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PCRE2_UNSET.
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</P>
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<P>
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For DFA matching, the <i>offset_vector</i> field points to the ovector that was
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@ -427,7 +428,7 @@ Cambridge, England.
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</P>
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<br><a name="SEC8" href="#TOC1">REVISION</a><br>
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<P>
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Last updated: 29 March 2017
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Last updated: 14 April 2017
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<br>
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Copyright © 1997-2017 University of Cambridge.
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<br>
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@ -1351,10 +1351,27 @@ COMPILING A PATTERN
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PCRE2_ENDANCHORED
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If this bit is set, the end of any pattern match must be right at the
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end of the string being searched (the "subject string"). This effect
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end of the string being searched (the "subject string"). If the pattern
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match succeeds by reaching (*ACCEPT), but does not reach the end of the
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subject, the match fails at the current starting point. For unanchored
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patterns, a new match is then tried at the next starting point. How-
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ever, if the match succeeds by reaching the end of the pattern, but not
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the end of the subject, backtracking occurs and an alternative match
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may be found. Consider these two patterns:
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.(*ACCEPT)|..
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.|..
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If matched against "abc" with PCRE2_ENDANCHORED set, the first matches
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"c" whereas the second matches "bc". The effect of PCRE2_ENDANCHORED
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can also be achieved by appropriate constructs in the pattern itself,
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which is the only way to do it in Perl.
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For DFA matching with pcre2_dfa_match(), PCRE2_ENDANCHORED applies only
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to the first (that is, the longest) matched string. Other parallel
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matches, which are necessarily substrings of the first one, must obvi-
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ously end before the end of the subject.
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PCRE2_EXTENDED
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If this bit is set, most white space characters in the pattern are
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@ -3241,7 +3258,7 @@ AUTHOR
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REVISION
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Last updated: 11 April 2017
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Last updated: 14 April 2017
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Copyright (c) 1997-2017 University of Cambridge.
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------------------------------------------------------------------------------
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@ -3965,12 +3982,12 @@ MISSING CALLOUTS
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THE CALLOUT INTERFACE
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During matching, when PCRE2 reaches a callout point, if an external
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function is set in the match context, it is called. This applies to
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both normal and DFA matching. The first argument to the callout func-
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tion is a pointer to a pcre2_callout block. The second argument is the
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void * callout data that was supplied when the callout was set up by
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calling pcre2_set_callout() (see the pcre2api documentation). The call-
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out block structure contains the following fields:
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function is provided in the match context, it is called. This applies
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to both normal and DFA matching. The first argument to the callout
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function is a pointer to a pcre2_callout block. The second argument is
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the void * callout data that was supplied when the callout was set up
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by calling pcre2_set_callout() (see the pcre2api documentation). The
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callout block structure contains the following fields:
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uint32_t version;
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uint32_t callout_number;
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@ -4027,8 +4044,8 @@ THE CALLOUT INTERFACE
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of callout.
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The offset_vector field is a pointer to a vector of capturing offsets
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(the "ovector"). You may read certain elements in this vector, but you
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must not change any of them.
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(the "ovector"). You may read the elements in this vector, but you must
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not change any of them.
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For calls to pcre2_match(), the offset_vector field is not (since
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release 10.30) a pointer to the actual ovector that was passed to the
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@ -4049,10 +4066,10 @@ THE CALLOUT INTERFACE
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The contents of ovector[2] to ovector[<capture_top>*2-1] can be
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inspected in order to extract substrings that have been matched so far,
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in the same way as extracting substrings after a match has completed.
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The values in ovector[0] and ovector[1] are undefined and should not be
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used in any way. Substrings that have not been captured (but whose num-
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bers are less than capture_top) have both of their ovector slots set to
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PCRE2_UNSET.
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The values in ovector[0] and ovector[1] are always PCRE2_UNSET because
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the match is by definition not complete. Substrings that have not been
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captured but whose numbers are less than capture_top also have both of
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their ovector slots set to PCRE2_UNSET.
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For DFA matching, the offset_vector field points to the ovector that
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was passed to the matching function in the match data block, but it
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@ -4170,7 +4187,7 @@ AUTHOR
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REVISION
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Last updated: 29 March 2017
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Last updated: 14 April 2017
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Copyright (c) 1997-2017 University of Cambridge.
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------------------------------------------------------------------------------
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@ -1,4 +1,4 @@
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.TH PCRE2_MAKETABLES 3 "24 March 2017" "PCRE2 10.30"
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.TH PCRE2_MAKETABLES 3 "17 April 2017" "PCRE2 10.30"
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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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@ -7,7 +7,7 @@ PCRE2 - Perl-compatible regular expressions (revised API)
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.B #include <pcre2.h>
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.PP
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.SM
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.B const unsigned char *pcre2_maketables(pcre22_general_context *\fIgcontext\fP);
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.B const unsigned char *pcre2_maketables(pcre2_general_context *\fIgcontext\fP);
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.
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.SH DESCRIPTION
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.rs
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