1PPIx::Regexp::Util(3) User Contributed Perl DocumentationPPIx::Regexp::Util(3)
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NAME

6       PPIx::Regexp::Util - Utility functions for PPIx::Regexp;
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SYNOPSIS

9        use PPIx::Regexp::Util qw{ __instance };
10            .
11            .
12            .
13        __instance( $foo, 'Bar' )
14            or die '$foo is not a Bar';
15

DESCRIPTION

17       This module contains utility functions for PPIx::Regexp which it is
18       convenient to centralize.
19
20       Double-underscore subroutines are private to the "PPIx-Regexp" package.
21       Their documentation is provided for the author's convenience only, and
22       they are subject to change without notice. Caveat user.
23
24       This module exports nothing by default.
25

SUBROUTINES

27       This module can export the following subroutines:
28
29   is_ppi_regexp_element
30        is_ppi_regexp_element( $elem )
31          and print "$elem is a regexp of some sort\n";
32
33       This subroutine is public and supported.
34
35       This subroutine takes as its argument a PPI::Element. It returns a true
36       value if the argument represents a regular expression of some sort, and
37       a false value otherwise.
38
39   __instance
40        __instance( $foo, 'Bar' )
41            and print '$foo isa Bar', "\n";
42
43       This subroutine is private to the "PPIx-Regexp" package.
44
45       This subroutine returns true if its first argument is an instance of
46       the class specified by its second argument. Unlike "UNIVERSAL::isa",
47       the result is always false unless the first argument is a reference.
48
49   __is_ppi_regexp_element
50        __is_ppi_regexp_element( $elem )
51          and print "$elem is a regexp of some sort\n";
52
53       This subroutine is private to the "PPIx-Regexp" package.
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55       This is a synonym for is_ppi_regexp_element(), and is deprecated in
56       favor of it. If called, it will complain via Carp::cluck() and then
57       "goto &is_ppi_regexp_element".
58
59   __merge_perl_requirements
60       This subroutine is private to the "PPIx-Regexp" package.
61
62       This subroutine merges perl requirements as returned by the various
63       "__perl_requirements()" methods.
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65   __ns_can
66       This subroutine is private to the "PPIx-Regexp" package.
67
68       This method is analogous to can(), but returns a reference to the code
69       only if it is actually implemented by the invoking name space.
70
71   __post_rebless_error
72       This method is private to the "PPIx-Regexp" package. The intended use
73       is to alias it to "__PPIX_ELEM__post_reblessing()".
74
75       It takes arguments as name/value pairs. Argument "{error}" is the error
76       message; if it is omitted you get a warning with stack trace. Argument
77       "{explanation}" defaults to "{error}".
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79       It returns the number of errors to add to the parse.
80
81   raw_width
82       This public method returns the minimum and maximum width matched by the
83       element before taking into account such details as what the element
84       actually is and how it is quantified.
85
86       This implementation is appropriate to things that match exactly one
87       character -- i.e. it returns "( 1, 1 )".
88
89   __to_ordinal_en
90       This subroutine is private to the "PPIx-Regexp" package.
91
92       This subroutine takes as its argument an integer and returns a string
93       representing its ordinal in English. For example
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95        say __to_ordinal_en( 17 );
96        # 17th
97
98   width
99        my ( $min_wid, $max_wid ) = $self->width();
100
101       This public method (well, mixin) returns the minimum and maximum width
102       of the text matched by the element.
103
104       Elements which import this method must also implement a raw_width()
105       method which returns the unquantified width of the element.
106

EXPORT TAGS

108       The following export tags are defined by this module. All are private
109       to the "PPIx-Regexp" package unless otherwise documented.
110
111   all
112       This tag exports everything exportable by this module.
113
114   width_one
115       This tag is appropriate to an element which, when unquantified, matches
116       exactly one character. It exports raw_width() and width().
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SEE ALSO

119       Params::Util, which I recommend, but in the case of "PPIx::Regexp" I
120       did not want to introduce a dependency on an XS module when all I
121       really wanted was the function of that module's _INSTANCE() subroutine.
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SUPPORT

124       Support is by the author. Please file bug reports at
125       <https://rt.cpan.org/Public/Dist/Display.html?Name=PPIx-Regexp>,
126       <https://github.com/trwyant/perl-PPIx-Regexp/issues>, or in electronic
127       mail to the author.
128

AUTHOR

130       Thomas R. Wyant, III wyant at cpan dot org
131

133       Copyright (C) 2010-2023 by Thomas R. Wyant, III
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135       This program is free software; you can redistribute it and/or modify it
136       under the same terms as Perl 5.10.0. For more details, see the full
137       text of the licenses in the directory LICENSES.
138
139       This program is distributed in the hope that it will be useful, but
140       without any warranty; without even the implied warranty of
141       merchantability or fitness for a particular purpose.
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145perl v5.36.0                      2023-01-30             PPIx::Regexp::Util(3)
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