Template problem ... Post: 302239595

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Top Forums Programming Template problem ... Post 302239595 by spirtle on Wednesday 24th of September 2008 04:52:56 AM

09-24-2008

Registered User

You didn't post the code that doesn't work, but I guess that you want to define the method template in a separate file rather than in the definition of the class, as one often does for normal class methods.
Short answer; you can't.

There is, no doubt, a better explanation in a text book somewhere, but here goes...
Templates are not like normal code; you cannot define them where ever you like. When the compiler sees your call to

Code:

int a;
Base_class::fun(a,check);

here is no method with signature

Code:

fun(int, string&);

so it has to create one from the template you supplied. This means that the compiler has to be able to see the both the template (so it knows how to build the function) and the call (so it knows what types to build the function with) at the same time. So the template and the code calling the method must be in the same compilation unit.
You don't have to have the method template defined inline, but you must have it defined where the class is defined.

spirtle

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dancer::template::templatetoolkit

Dancer::Template::TemplateToolkit(3pm)			User Contributed Perl Documentation		    Dancer::Template::TemplateToolkit(3pm)

NAME

       Dancer::Template::TemplateToolkit - Template Toolkit wrapper for Dancer

DESCRIPTION

       This class is an interface between Dancer's template engine abstraction layer and the Template module.

       This template engine is recomended for production purposes, but depends on the Template module.

       In order to use this engine, use the template setting:

	   template: template_toolkit

       This can be done in your config.yml file or directly in your app code with the set keyword.

       Note that by default,  Dancer configures the Template::Toolkit engine to use <% %> brackets instead of its default [% %] brackets.  This
       can be changed within your config file - for example:

	   template: template_toolkit
	   engines:
	       template_toolkit:
		   start_tag: '[%'
		   stop_tag: '%]'

       You can also add any options you would normally add to the Template module's initialization. You could, for instance, enable saving the
       compiled templates:

	   engines:
	       template_toolkit:
		   COMPILE_DIR: 'caches/templates'
		   COMPILE_EXT: '.ttc'

       By default, Template is used, but you can configure Dancer to use a subclass with the "subclass" option.

	   engines:
	       template_toolkit:
		   subclass: My::Template

WRAPPER, META variables, SETs
       Dancer already provides a WRAPPER-like ability, which we call a "layout". The reason we do not use TT's WRAPPER (which also makes it
       incompatible with it) is because not all template systems support it. Actually, most don't.

       However, you might want to use it, and be able to define META variables and regular Template::Toolkit variables.

       These few steps will get you there:

       o   Disable the layout in Dancer

	   You can do this by simply commenting (or removing) the "layout" configuration in the config.yml file.

       o   Use Template Toolkit template engine

	   Change the configuration of the template to Template Toolkit:

	       # in config.yml
	       template: "template_toolkit"

       o   Tell the Template Toolkit engine who's your wrapper

	       # in config.yml
	       # ...
	       engines:
		   template_toolkit:
		       WRAPPER: layouts/main.tt

       Done! Everything will work fine out of the box, including variables and META variables.

SEE ALSO

       Dancer, Template

AUTHOR

       This module has been written by Alexis Sukrieh

LICENSE

       This module is free software and is released under the same terms as Perl itself.

perl v5.14.2							    2012-01-27				    Dancer::Template::TemplateToolkit(3pm)