Summary
This class is responsible to load a template and transform it in the PHPBoost parsed template syntax.
Normally a loader is able to load a template and provide its parsed form. The parsing is done by a TemplateParser it embeds and is a quite heavy operation. To be more efficient, we've introduced the parsed files caching which enables us to parse each file only once and then reuse the cache. Even if the TemplateLoader interface knows the cache notion, that doesn't mean that the implementation has to support caching. It's the reason why there is the \supports_caching() method.