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Modules.pod
#============================================================= -*-perl-*- # # Template::Modules # # DESCRIPTION # # AUTHOR # Andy Wardley <abw@wardley.org> # # COPYRIGHT # Copyright (C) 1996-2022 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. # #======================================================================== =head1 NAME Template::Modules - Template Toolkit Modules =head1 Template Toolkit Modules This documentation provides an overview of the different modules that comprise the Template Toolkit. =head2 Template The L<Template> module is the front-end to the Template Toolkit for Perl programmers. use Template; my $tt = Template->new(); $tt->process('hello.html', message => 'Hello World'); =head2 Template::Base The L<Template::Base> module implements a base class from which the other Template Toolkit modules are derived. It implements common functionality for creating objects, error reporting, debugging, and so on. =head2 Template::Config The L<Template::Config> module defines the configuration of the Template Toolkit for your system. It is an example of a I<factory module> which is responsible for instantiating the various other modules used in the Template Toolkit. For example, the L<Template::Config> module defines the C<$STASH> package variable which indicates which version of the L<Template::Stash> you are using by default. If you elected to use the faster L<XS|Template::Stash::XS> stash when you installed the Template Toolkit, then this will be set as: $STASH = 'Template::Stash::XS'; Otherwise you'll get the regular L<Perl|Template::Stash> stash: $STASH = 'Template::Stash'; This approach means that other parts of the Template Toolkit don't have to worry about which stash you're using. They just ask the L<Template::Config> module to create a stash of the right kind. =head2 Template::Constants The L<Template::Constants> defines a number of constants that are used by the Template Toolkit. For example, the C<:chomp> tagset defines the C<CHOMP_???> constants that can be used with the C<PRE_CHOMP> and C<POST_CHOMP> configuration options. use Template::Constants ':chomp'; my $tt = Template->new({ PRE_CHOMP => CHOMP_COLLAPSE, }); =head2 Template::Context The L<Template::Context> module defines a runtime context in which templates are processed. A context keeps track of all the templates, variables, plugins, and other resources that are available (either directly or through delegate objects) and provides methods to fetch, store, and perform various operations on them. =head2 Template::Document The L<Template::Document> module implements a compiled template document object. This is generated by the L<Template::Parser> module. =head2 Template::Exception The L<Template::Exception> module implements an exception object which is used for runtime error reporting. =head2 Template::Filters The L<Template::Filters> module implements a filter provider. It includes the core collection of filters that can be used via the C<FILTER> directive. =head2 Template::Iterator The L<Template::Iterator> module implements a data iterator which steps through each item in a list in turn. It is used by the C<FOREACH> directive. Within a C<FOREACH> block, the C<loop> variable always references the current iterator object. [% FOREACH item IN list; IF loop.first; # first item in loop ELSIF loop.last; # last item in loop ELSE; # any other item in loop END; END %] =head2 Template::Namespace::Constants The L<Template::Namespace::Constants> module is used internally to represent constants. These can be resolved immediately at the point that a template is compiled. =head2 Template::Parser The L<Template::Parser> module is used to parse a source template and turn it into Perl code which can be executed. =head2 Template::Plugin The L<Template::Plugin> module is a base class for Template Toolkit plugins that can be loaded on demand from within a template using the C<USE> directive. =head2 Template::Plugins The L<Template::Plugins> module is the plugins provider. It loads and prepares plugins as and when they are requested from within a template. =head2 Template::Provider The L<Template::Provider> module is responsible for loading, compiling and caching templates. =head2 Template::Service The L<Template::Service> module implements a service layer that sits just behind the L<Template> module, and just in front of a L<Template::Context>. It handles each request to process a template (forwarded from the L<Template> module). It adds any headers and/or footers (specified via the C<PRE_PROCESS> and C<POST_PROCESS> options), applies any wrapper (the C<WRAPPER> option) and catches any errors returned (the C<ERRORS> option). =head2 Template::Stash The L<Template::Stash> module is used to fetch and store template variables. It implements all of the magic associated with the dot operator. =head2 Template::Stash::XS The L<Template::Stash::XS> module is a high-speed implementation of L<Template::Stash> written in C. =head2 Template::Test The L<Template::Test> module is used to automate the Template Toolkit test scripts. =cut # Local Variables: # mode: perl # perl-indent-level: 4 # indent-tabs-mode: nil # End: # # vim: expandtab shiftwidth=4:
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