Trait nickel_mustache::TemplateCache [−] [src]

pub trait TemplateCache {
    fn handle<'a, P, F, R>(&self, path: &'a Path, handle: P, on_miss: F) -> R where P: FnOnce(Result<&Template, CompileError>) -> R, F: FnOnce(&'a Path) -> Result<Template, CompileError>;
}

Handle template caching through a borrowed reference.

Required Methods

fn handle<'a, P, F, R>(&self, path: &'a Path, handle: P, on_miss: F) -> R where P: FnOnce(Result<&Template, CompileError>) -> R, F: FnOnce(&'a Path) -> Result<Template, CompileError>

Handles a cache lookup for a given template.

Expected behavior

if let Some(template) = cache.get(path) {
    return handle(template)
} else {
    let template = on_miss(path);
    return handle(template)
}

Fix-me!

The signature is a bit crazy, but due to the nature of the interior mutability required it's difficult to express a general interface without restrictions on the kinds of type TemplateCache could be implemented for.

Any improvements to get it to a more entry-like design are welcome!

Implementors