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It's very nice.</span> </a> <a href="#" class="menu hide" onclick="widescreen_on(); return false" title="Hide Menu"> <span class="about">Click to hide the menu and go all widescreen!</span> </a> <div class="pager"> <a href="../../modules/Template/Document.html" title="Template::Document" class="go back">Back<span class="about"><h4>Template::Document</h4>Compiled template document object</span></a> <a href="../../modules/Template/index.html" title="Template::* Modules" class="go up">Up<span class="about"><h4>Template::* Modules</h4></span></a> <a href="../../modules/Template/Filters.html" title="Template::Filters" class="go next">Next<span class="about"><h4>Template::Filters</h4>Post-processing filters for template blocks</span></a> </div> </div> <h1 class="headline">Template::Exception</h1> <h2 class="subhead">Exception handling class module</h1> </div> <div id="page"> <div id="sidebar"> <a href="../../index.html" id="logo"></a> <div id="menu"> <ul class="menu"> <li class="l0 first"><a href="../../manual/index.html">Manual</a></li> <li class="l0"><a href="../../modules/index.html" class="warm">Modules</a></li> <li class="l1"><a href="../../modules/Template.html">Template.pm</a></li> <li class="l1"><a href="../../modules/Template/index.html" class="warm">Template::*</a></li> <li class="l2"><a href="../../modules/Template/Base.html">Base.pm</a></li> <li class="l2"><a href="../../modules/Template/Config.html">Config.pm</a></li> <li class="l2"><a href="../../modules/Template/Constants.html">Constants.pm</a></li> <li class="l2"><a href="../../modules/Template/Context.html">Context.pm</a></li> <li class="l2"><a href="../../modules/Template/Directive.html">Directive.pm</a></li> <li class="l2"><a href="../../modules/Template/Document.html">Document.pm</a></li> <li class="l2"><a href="../../modules/Template/Exception.html" class="warm">Exception.pm</a></li> <li class="l2"><a href="../../modules/Template/Filters.html">Filters.pm</a></li> <li class="l2"><a href="../../modules/Template/Grammar.html">Grammar.pm</a></li> <li class="l2"><a href="../../modules/Template/Iterator.html">Iterator.pm</a></li> <li class="l2"><a href="../../modules/Template/Namespace/index.html">Namespace::*</a></li> <li class="l2"><a href="../../modules/Template/Parser.html">Parser.pm</a></li> <li class="l2"><a href="../../modules/Template/Plugin.html">Plugin.pm</a></li> <li class="l2"><a href="../../modules/Template/Plugin/index.html">Plugin::*</a></li> <li class="l2"><a href="../../modules/Template/Plugins.html">Plugins.pm</a></li> <li class="l2"><a href="../../modules/Template/Provider.html">Provider.pm</a></li> <li class="l2"><a href="../../modules/Template/Service.html">Service.pm</a></li> <li class="l2"><a href="../../modules/Template/Stash.html">Stash.pm</a></li> <li class="l2"><a href="../../modules/Template/Stash/index.html">Stash::*</a></li> <li class="l2"><a href="../../modules/Template/Test.html">Test.pm</a></li> <li class="l2"><a href="../../modules/Template/VMethods.html">VMethods.pm</a></li> <li class="l2"><a href="../../modules/Template/View.html">View.pm</a></li> <li class="l0"><a href="../../tools/index.html">Tools</a></li> <li class="l0 last"><a href="../../tutorial/index.html">Tutorial</a></li> </ul> <div class="foot"></div> </div> </div> <div id="content"> <div class="section"> <div class="head"> <h1 id="contents" onclick="switch_section(this)" title="Click title to show/hide section content.">Contents</h1> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <ul class="toc"> <li class=""><a href="#SYNOPSIS">SYNOPSIS</a></li> <li class=""><a href="#DESCRIPTION">DESCRIPTION</a></li> <li class=""><a href="#METHODS">METHODS</a></li> <li class="sub"><a href="#method_type">type()</a></li> <li class="sub"><a href="#method_info">info()</a></li> <li class=""><a href="#AUTHOR">AUTHOR</a></li> <li class=""><a href="#COPYRIGHT">COPYRIGHT</a></li> <li class=""><a href="#SEE_ALSO">SEE ALSO</a></li> </ul> </div> </div> <div class="pod"> <div class="section"> <div class="head"> <h1 id="SYNOPSIS" onclick="switch_section(this)" title="Click title to show/hide section content.">SYNOPSIS</h1> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <pre>use Template::Exception; my $exception = Template::Exception-&gt;new($type, $info); $type = $exception-&gt;type; $info = $exception-&gt;info; ($type, $info) = $exception-&gt;type_info; print $exception-&gt;as_string(); $handler = $exception-&gt;select_handler(\@candidates);</pre> </div> </div> <div class="section"> <div class="head"> <h1 id="DESCRIPTION" onclick="switch_section(this)" title="Click title to show/hide section content.">DESCRIPTION</h1> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <p> The <code>Template::Exception</code> module defines an object class for representing exceptions within the template processing life cycle. Exceptions can be raised by modules within the Template Toolkit, or can be generated and returned by user code bound to template variables. </p> <p> Exceptions can be raised in a template using the <code>THROW</code> directive, </p> <pre>[% THROW user.login 'no user id: please login' %]</pre> <p> or by calling the <a href="../../modules/Template/Context.html#method_throw">throw()</a> method on the current <a href="../../modules/Template/Context.html">Template::Context</a> object, </p> <pre>$context-&gt;throw('user.passwd', 'Incorrect Password'); $context-&gt;throw('Incorrect Password'); # type 'undef'</pre> <p> or from Perl code by calling <code>die()</code> with a <code>Template::Exception</code> object, </p> <pre>die (Template::Exception-&gt;new('user.denied', 'Invalid User ID'));</pre> <p> or by simply calling <code>die()</code> with an error string. This is automagically caught and converted to an exception of '<code>undef</code>' type (that's the literal string '<code>undef</code>' rather than Perl's undefined value) which can then be handled in the usual way. </p> <pre>die "I'm sorry Dave, I can't do that";</pre> <p> Each exception is defined by its type and a information component (e.g. error message). The type can be any identifying string and may contain dotted components (e.g. '<code>foo</code>', '<code>foo.bar</code>', '<code>foo.bar.baz</code>'). Exception types are considered to be hierarchical such that '<code>foo.bar</code>' would be a specific type of the more general '<code>foo</code>' type. </p> </div> </div> <div class="section"> <div class="head"> <h1 id="METHODS" onclick="switch_section(this)" title="Click title to show/hide section content.">METHODS</h1> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <div class="subsection"> <div class="head"> <h2 id="method_type" class="method" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">type()</h2> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <p> Returns the exception type. </p> </div> </div> <div class="subsection"> <div class="head"> <h2 id="method_info" class="method" onclick="switch_subsection(this)" title="Click title to show/hide sub-section content.">info()</h2> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <p> Returns the exception information. </p> </div> </div> </div> </div> <div class="section"> <div class="head"> <h1 id="AUTHOR" onclick="switch_section(this)" title="Click title to show/hide section content.">AUTHOR</h1> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <p> Andy Wardley &lt;abw@wardley.org&gt; <a href="http://wardley.org/">http://wardley.org/</a> </p> </div> </div> <div class="section"> <div class="head"> <h1 id="COPYRIGHT" onclick="switch_section(this)" title="Click title to show/hide section content.">COPYRIGHT</h1> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <p> Copyright (C) 1996-2007 Andy Wardley. All Rights Reserved. </p> <p> This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. </p> </div> </div> <div class="section"> <div class="head"> <h1 id="SEE_ALSO" onclick="switch_section(this)" title="Click title to show/hide section content.">SEE ALSO</h1> <a href="#body" class="top" title="Back up to the top of the page" >Top</a> </div> <div class="body"> <p> <a href="../../modules/Template.html">Template</a>, <a href="../../modules/Template/Context.html">Template::Context</a> </p> </div> </div> </div></div> <br class="clear" /> <div class="pageinfo"> /modules/Template/Exception.html last modified 10:57:47 31-May-2007 </div> </div> <div id="footer"> <a href="http://opensource.org/" class="osi"></a> <div class="controls"> <div class="pager"> <a href="../../modules/Template/Document.html" title="Template::Document" class="go back">Back<span class="about"><h4>Template::Document</h4></span></a> <a href="../../modules/Template/index.html" title="Template::* Modules" class="go up">Up<span class="about"><h4>Template::* Modules</h4></span></a> <a href="../../modules/Template/Filters.html" title="Template::Filters" class="go next">Next<span class="about"><h4>Template::Filters</h4></span></a> </div> </div> <div class="copyright"> Copyright &copy; 1996-2007 <a href="http://wardley.org/">Andy Wardley</a>. 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