Template::Parser(3) User Contributed Perl Documentation Template::Parser(3)NAMETemplate::Parser - LALR(1) parser for compiling template documents
SYNOPSIS
use Template::Parser;
$parser = Template::Parser->new(\%config);
$template = $parser->parse($text)
|| die $parser->error(), "\n";
DESCRIPTION
The "Template::Parser" module implements a LALR(1) parser and
associated methods for parsing template documents into Perl code.
PUBLIC METHODS
new(\%params)
The "new()" constructor creates and returns a reference to a new
"Template::Parser" object.
A reference to a hash may be supplied as a parameter to provide
configuration values. See "CONFIGURATION OPTIONS" below for a summary
of these options and Template::Manual::Config for full details.
my $parser = Template::Parser->new({
START_TAG => quotemeta('<+'),
END_TAG => quotemeta('+>'),
});
parse($text)
The "parse()" method parses the text passed in the first parameter and
returns a reference to a hash array of data defining the compiled
representation of the template text, suitable for passing to the
Template::Document new() constructor method. On error, undef is
returned.
$data = $parser->parse($text)
|| die $parser->error();
The $data hash reference returned contains a "BLOCK" item containing
the compiled Perl code for the template, a "DEFBLOCKS" item containing
a reference to a hash array of sub-template "BLOCK"s defined within in
the template, and a "METADATA" item containing a reference to a hash
array of metadata values defined in "META" tags.
CONFIGURATION OPTIONS
The "Template::Parser" module accepts the following configuration
options. Please see Template::Manual::Config for futher details on
each option.
START_TAG, END_TAG
The START_TAG and END_TAG options are used to specify character
sequences or regular expressions that mark the start and end of a
template directive.
my $parser = Template::Parser->new({
START_TAG => quotemeta('<+'),
END_TAG => quotemeta('+>'),
});
TAG_STYLE
The TAG_STYLE option can be used to set both START_TAG and END_TAG
according to pre-defined tag styles.
my $parser = Template::Parser->new({
TAG_STYLE => 'star', # [* ... *]
});
PRE_CHOMP, POST_CHOMP
The PRE_CHOMP and POST_CHOMP can be set to remove any whitespace before
or after a directive tag, respectively.
my $parser = Template::Parser-E<gt>new({
PRE_CHOMP => 1,
POST_CHOMP => 1,
});
INTERPOLATE
The INTERPOLATE flag can be set to allow variables to be embedded in
plain text blocks.
my $parser = Template::Parser->new({
INTERPOLATE => 1,
});
Variables should be prefixed by a "$" to identify them, using curly
braces to explicitly scope the variable name where necessary.
Hello ${name},
The day today is ${day.today}.
ANYCASE
The ANYCASE option can be set to allow directive keywords to be
specified in any case.
# with ANYCASE set to 1
[% INCLUDE foobar %] # OK
[% include foobar %] # OK
[% include = 10 %] # ERROR, 'include' is a reserved word
GRAMMAR
The GRAMMAR configuration item can be used to specify an alternate
grammar for the parser. This allows a modified or entirely new template
language to be constructed and used by the Template Toolkit.
use MyOrg::Template::Grammar;
my $parser = Template::Parser->new({
GRAMMAR = MyOrg::Template::Grammar->new();
});
By default, an instance of the default Template::Grammar will be
created and used automatically if a "GRAMMAR" item isn't specified.
DEBUG
The DEBUG option can be used to enable various debugging features of
the "Template::Parser" module.
use Template::Constants qw( :debug );
my $template = Template->new({
DEBUG => DEBUG_PARSER | DEBUG_DIRS,
});
AUTHOR
Andy Wardley <abw@wardley.org> <http://wardley.org/>
COPYRIGHT
Copyright (C) 1996-2007 Andy Wardley. All Rights Reserved.
This module is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
The main parsing loop of the "Template::Parser" module was derived from
a standalone parser generated by version 0.16 of the "Parse::Yapp"
module. The following copyright notice appears in the "Parse::Yapp"
documentation.
The Parse::Yapp module and its related modules and shell
scripts are copyright (c) 1998 Francois Desarmenien,
France. All rights reserved.
You may use and distribute them under the terms of either
the GNU General Public License or the Artistic License, as
specified in the Perl README file.
SEE ALSO
Template, Template::Grammar, Template::Directive
perl v5.14.3 2012-01-13 Template::Parser(3)
