Template::Parser(3pm)

1Template::Parser(3)   User Contributed Perl Documentation  Template::Parser(3)
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NAME

6       Template::Parser - LALR(1) parser for compiling template documents
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SYNOPSIS

9           use Template::Parser;
10
11           $parser   = Template::Parser->new(\%config);
12           $template = $parser->parse($text)
13               || die $parser->error(), "\n";
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DESCRIPTION

16       The "Template::Parser" module implements a LALR(1) parser and
17       associated methods for parsing template documents into Perl code.
18

PUBLIC METHODS

20   new(\%params)
21       The "new()" constructor creates and returns a reference to a new
22       "Template::Parser" object.
23
24       A reference to a hash may be supplied as a parameter to provide
25       configuration values.  See "CONFIGURATION OPTIONS" below for a summary
26       of these options and Template::Manual::Config for full details.
27
28           my $parser = Template::Parser->new({
29               START_TAG => quotemeta('<+'),
30               END_TAG   => quotemeta('+>'),
31           });
32
33   parse($text)
34       The "parse()" method parses the text passed in the first parameter and
35       returns a reference to a hash array of data defining the compiled
36       representation of the template text, suitable for passing to the
37       Template::Document new() constructor method. On error, undef is
38       returned.
39
40           $data = $parser->parse($text)
41               || die $parser->error();
42
43       The $data hash reference returned contains a "BLOCK" item containing
44       the compiled Perl code for the template, a "DEFBLOCKS" item containing
45       a reference to a hash array of sub-template "BLOCK"s defined within in
46       the template, and a "METADATA" item containing a reference to a hash
47       array of metadata values defined in "META" tags.
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CONFIGURATION OPTIONS

50       The "Template::Parser" module accepts the following configuration
51       options.  Please see Template::Manual::Config for futher details on
52       each option.
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54   START_TAG, END_TAG
55       The START_TAG and END_TAG options are used to specify character
56       sequences or regular expressions that mark the start and end of a
57       template directive.
58
59           my $parser = Template::Parser->new({
60               START_TAG => quotemeta('<+'),
61               END_TAG   => quotemeta('+>'),
62           });
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64   TAG_STYLE
65       The TAG_STYLE option can be used to set both START_TAG and END_TAG
66       according to pre-defined tag styles.
67
68           my $parser = Template::Parser->new({
69               TAG_STYLE => 'star',     # [* ... *]
70           });
71
72   PRE_CHOMP, POST_CHOMP
73       The PRE_CHOMP and POST_CHOMP can be set to remove any whitespace before
74       or after a directive tag, respectively.
75
76           my $parser = Template::Parser-E<gt>new({
77               PRE_CHOMP  => 1,
78               POST_CHOMP => 1,
79           });
80
81   INTERPOLATE
82       The INTERPOLATE flag can be set to allow variables to be embedded in
83       plain text blocks.
84
85           my $parser = Template::Parser->new({
86               INTERPOLATE => 1,
87           });
88
89       Variables should be prefixed by a "$" to identify them, using curly
90       braces to explicitly scope the variable name where necessary.
91
92           Hello ${name},
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94           The day today is ${day.today}.
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96   ANYCASE
97       The ANYCASE option can be set to allow directive keywords to be
98       specified in any case.
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100           # with ANYCASE set to 1
101           [% INCLUDE foobar %]    # OK
102           [% include foobar %]    # OK
103           [% include = 10   %]    # ERROR, 'include' is a reserved word
104
105   GRAMMAR
106       The GRAMMAR configuration item can be used to specify an alternate
107       grammar for the parser. This allows a modified or entirely new template
108       language to be constructed and used by the Template Toolkit.
109
110           use MyOrg::Template::Grammar;
111
112           my $parser = Template::Parser->new({
113               GRAMMAR = MyOrg::Template::Grammar->new();
114           });
115
116       By default, an instance of the default Template::Grammar will be
117       created and used automatically if a "GRAMMAR" item isn't specified.
118
119   DEBUG
120       The DEBUG option can be used to enable various debugging features of
121       the "Template::Parser" module.
122
123           use Template::Constants qw( :debug );
124
125           my $template = Template->new({
126               DEBUG => DEBUG_PARSER | DEBUG_DIRS,
127           });
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AUTHOR

130       Andy Wardley <abw@wardley.org> <http://wardley.org/>
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COPYRIGHT

133       Copyright (C) 1996-2007 Andy Wardley.  All Rights Reserved.
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135       This module is free software; you can redistribute it and/or modify it
136       under the same terms as Perl itself.
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138       The main parsing loop of the "Template::Parser" module was derived from
139       a standalone parser generated by version 0.16 of the "Parse::Yapp"
140       module. The following copyright notice appears in the "Parse::Yapp"
141       documentation.
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143           The Parse::Yapp module and its related modules and shell
144           scripts are copyright (c) 1998 Francois Desarmenien,
145           France. All rights reserved.
146
147           You may use and distribute them under the terms of either
148           the GNU General Public License or the Artistic License, as
149           specified in the Perl README file.
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