1PPIx::QuoteLike::Token(U3s)er Contributed Perl DocumentatPiPoInx::QuoteLike::Token(3)
2
6 PPIx::QuoteLike::Token - Represent any token.
7
9 This is an abstract class, and should not be instantiated by the user.
10
12 This Perl module represents the base of the token hierarchy.
13
15 "PPIx::QuoteLike::Token" is not descended from any other class.
16 "PPIx::QuoteLike::Token" is the parent of
18 PPIx::QuoteLike::Token::Control, PPIx::QuoteLike::Token::Interpolation,
19 PPIx::QuoteLike::Token::String, PPIx::QuoteLike::Token::Structure,
20 PPIx::QuoteLike::Token::Unknown and PPIx::QuoteLike::Token::Whitespace.
21
23 This class supports the following public methods:
24 column_number
26 This method returns the column number of the first character in the
27 element, or "undef" if that can not be determined.
28 content
30 say $token->content();
31 This method returns the text that makes up the token.
33 error
35 say $token->error();
36 This method returns the error text. This will be "undef" unless the
38 token actually represents an error.
39 line_number
41 This method returns the line number of the first character in the
42 element, or "undef" if that can not be determined.
43 location
45 This method returns a reference to an array describing the position of
46 the element in the string, or "undef" if the location is unavailable.
47 The array is compatible with the corresponding PPI::Element method.
49 logical_filename
51 This method returns the logical file name (taking "#line" directives
52 into account) of the file containing first character in the element, or
53 "undef" if that can not be determined.
54 logical_line_number
56 This method returns the logical line number (taking "#line" directives
57 into account) of the first character in the element, or "undef" if that
58 can not be determined.
59 parent
61 my $parent = $token->parent();
62 This method returns the token's parent, which will be the
64 PPIx::QuoteLike object that contains it.
65 next_sibling
67 my $next = $token->next_sibling();
68 This method returns the token after the invocant, or nothing if there
70 is none.
71 perl_version_introduced
73 This method returns the version of Perl in which the element was
74 introduced. This will be at least 5.000. Before 5.006 I am relying on
75 the perldelta, perlre, and perlop documentation, since I have been
76 unable to build earlier Perls. Since I have found no documentation
77 before 5.003, I assume that anything found in 5.003 is also in 5.000.
78 Since this all depends on my ability to read and understand masses of
80 documentation, the results of this method should be viewed with
81 caution, if not downright skepticism.
82 There are also cases which are ambiguous in various ways. For those see
84 "RESTRICTIONS" in PPIx::Regexp, and especially "Changes in Syntax" in
85 PPIx::Regexp.
86 perl_version_removed
88 This method returns the version of Perl in which the element was
89 removed. If the element is still valid the return is "undef".
90 All the caveats to perl_version_introduced() apply here also, though
92 perhaps less severely since although many features have been introduced
93 since 5.0, few have been removed.
94 previous_sibling
96 my $prev = $token->previous_sibling();
97 This method returns the token before the invocant, or nothing if there
99 is none.
100 significant
102 $token->significant()
103 and say 'significant';
104 This Boolean method returns a true value if the token is significant,
106 and a false one otherwise.
107 snext_sibling
109 my $next = $token->snext_sibling();
110 This method returns the significant token after the invocant, or
112 nothing if there is none.
113 sprevious_sibling
115 my $prev = $token->sprevious_sibling();
116 This method returns the significant token before the invocant, or
118 nothing if there is none.
119 statement
121 This method returns the PPI::Statement that contains this token, or
122 nothing if the statement can not be determined.
123 In general this method will return something only under the following
125 conditions:
126 • The token is contained in a PPIx::QuoteLike object;
128 • That object was initialized from a PPI::Element;
130 • The PPI::Element is contained in a statement.
132 top
134 This method returns the top of the hierarchy.
135 variables
137 say "Interpolates $_" for $elem->variables();
138 NOTE that this method is discouraged, and may well be deprecated and
140 removed. I have two problems with it. The first is that it returns
141 variable names rather than PPI::Element objects, leaving you no idea
142 how the variables are used. The second is that it does not properly
143 handle things like "${^CAPTURE[0]}", and it seems infeasible to make it
144 do so. It was originally written for the benefit of
145 Perl::Critic::Policy::Variables::ProhibitUnusedVarsStricter, but has
146 proven inadequate to that policy's needs.
147 This convenience method returns all interpolated variables. Each is
149 returned only once, and they are returned in no particular order.
150 NOTE that because this class does not represent an interpolation, this
152 method returns nothing.
153 visual_column_number
155 This method returns the visual column number (taking tabs into account)
156 of the first character in the element, or "undef" if that can not be
157 determined.
158
160 PPIx::QuoteLike.
161
163 Support is by the author. Please file bug reports at
164 <https://rt.cpan.org/Public/Dist/Display.html?Name=PPIx-QuoteLike>,
165 <https://github.com/trwyant/perl-PPIx-QuoteLike/issues>, or in
166 electronic mail to the author.
167
169 Thomas R. Wyant, III wyant at cpan dot org
170
172 Copyright (C) 2016-2022 by Thomas R. Wyant, III
173 This program is free software; you can redistribute it and/or modify it
175 under the same terms as Perl 5.10.0. For more details, see the full
176 text of the licenses in the directory LICENSES.
177 This program is distributed in the hope that it will be useful, but
179 without any warranty; without even the implied warranty of
180 merchantability or fitness for a particular purpose.
181perl v5.36.0 2023-01-20 PPIx::QuoteLike::Token(3)