1PPIx::Regexp::Token::GrUosueprTyCpoen(t3r)ibuted Perl DoPcPuImxe:n:tRaetgieoxnp::Token::GroupType(3)
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6 PPIx::Regexp::Token::GroupType - Represent a grouping parenthesis type.
7
9 use PPIx::Regexp::Dumper;
10 PPIx::Regexp::Dumper->new( 'qr{(?i:foo)}smx' )
11 ->print();
12
14 "PPIx::Regexp::Token::GroupType" is a PPIx::Regexp::Token.
15 "PPIx::Regexp::Token::GroupType" is the parent of
17 PPIx::Regexp::Token::GroupType::Assertion,
18 PPIx::Regexp::Token::GroupType::Atomic_Script_Run,
19 PPIx::Regexp::Token::GroupType::BranchReset,
20 PPIx::Regexp::Token::GroupType::Code,
21 PPIx::Regexp::Token::GroupType::Modifier,
22 PPIx::Regexp::Token::GroupType::NamedCapture,
23 PPIx::Regexp::Token::GroupType::Script_Run,
24 PPIx::Regexp::Token::GroupType::Subexpression and
25 PPIx::Regexp::Token::GroupType::Switch.
26
28 This class represents any of the magic sequences of characters that can
29 follow an open parenthesis. This particular class is intended to be
30 abstract.
31
33 This class provides no public methods beyond those provided by its
34 superclass.
35 __defining_string
37 my $string = $class->__defining_string();
38 This method is private to the "PPIx-Regexp" package, and is documented
40 for the author's benefit only. It may be changed or revoked without
41 notice.
42 This method returns an array of strings that define the specific group
44 type. These strings will normally start with '?'.
45 Optionally, the first returned item may be a hash reference. The only
47 supported key is "{suffix}", which is a string to be suffixed to each
48 of the regular expressions made by "__make_group_type_matcher()" out of
49 the defining strings, inside a "(?= ... )", so that it is not included
50 in the match.
51 This method must be overridden, unless "__make_group_type_matcher()"
53 is. The override must return the same thing each time, since the
54 results of "__make_group_type_matcher()" are cached.
55 __make_group_type_matcher
57 my $hash_ref = $class->__make_group_type_matcher();
58 This method is private to the "PPIx-Regexp" package, and is documented
60 for the author's benefit only. It may be changed or revoked without
61 notice.
62 This method returns a reference to a hash. The keys are regexp
64 delimiter characters which appear in the defining strings for the group
65 type. For each key, the value is a reference to an array of "Regexp"
66 objects, properly escaped for the key character. Key '' provides the
67 regular expressions to be used if the regexp delimiter does not appear
68 in any of the defining strings.
69 If this method is overridden by the subclass, method
71 "__defining_string()" need not be, unless the overridden
72 "__make_group_type_matcher()" calls "__defining_string()".
73 __match_setup
75 $class->__match_setup( $tokenizer );
76 This method is private to the "PPIx-Regexp" package, and is documented
78 for the author's benefit only. It may be changed or revoked without
79 notice.
80 This method performs whatever setup is needed once it is determined
82 that the given group type has been detected. This method is called
83 only if the class matched at the current position in the string being
84 parsed. It must perform whatever extra setup is needed for the match.
85 It returns nothing.
86 This method need not be overridden. The default does nothing.
88 __setup_class
90 $class->__setup_class( \%definition, \%opt );
91 This method is private to the "PPIx-Regexp" package, and is documented
93 for the author's benefit only. It may be changed or revoked without
94 notice.
95 This method uses the %definition hash to create the
97 "__defining_string()", "explain()", "perl_version_introduced()", and
98 "perl_version_removed()" methods for the calling class. Any of these
99 that already exist will not be replaced.
100 The %definition hash defines all the strings that specify tokens of the
102 invoking class. You can not (unfortunately) use this mechanism if you
103 need a regular expression to recognize a token that belongs to this
104 class. The keys of the %definition hash are strings that specify
105 members of this class. The values are hashes that define the specific
106 member of the class. The following values are supported:
107 {expl}
109 This is the explanation of the element, to be returned by the
110 "explain()" method.
111 {intro}
113 This is the Perl version that introduced the element, as a string.
114 The default is the value of constant MINIMUM_PERL.
115 {remov}
117 This is the Perl version that removed the element, as a string. The
118 default is "undef", meaning that the element is still present in
119 the highest released version of Perl, whether development or
120 production.
121 The %opt hash is optional, and defaults to the empty hash. It is used,
123 basically, for ad-hocery. The supported keys are:
124 {suffix}
126 If this element is defined, the first element returned by the
127 generated __defining_string() method is a hash containing this key
128 and value.
129
131 Support is by the author. Please file bug reports at
132 <https://rt.cpan.org/Public/Dist/Display.html?Name=PPIx-Regexp>,
133 <https://github.com/trwyant/perl-PPIx-Regexp/issues>, or in electronic
134 mail to the author.
135
137 Thomas R. Wyant, III wyant at cpan dot org
138
140 Copyright (C) 2009-2021 by Thomas R. Wyant, III
141 This program is free software; you can redistribute it and/or modify it
143 under the same terms as Perl 5.10.0. For more details, see the full
144 text of the licenses in the directory LICENSES.
145 This program is distributed in the hope that it will be useful, but
147 without any warranty; without even the implied warranty of
148 merchantability or fitness for a particular purpose.
149perl v5.32.1 2021-03-26 PPIx::Regexp::Token::GroupType(3)