Trait iron::Plugin

pub trait Plugin {
    fn get<P>(&mut self) -> Result<P::Value, P::Error> where P: Plugin<Self>, Self: Extensible, P::Value: Clone, P::Value: Any { ... }
    fn get_ref<P>(&mut self) -> Result<&P::Value, P::Error> where P: Plugin<Self>, Self: Extensible, P::Value: Any { ... }
    fn get_mut<P>(&mut self) -> Result<&mut P::Value, P::Error> where P: Plugin<Self>, Self: Extensible, P::Value: Any { ... }
    fn compute<P>(&mut self) -> Result<P::Value, P::Error> where P: Plugin<Self> { ... }
}

[−] Expand description

An interface for plugins that cache values between calls.

R is the type of the plugin's return value, which must be cloneable.

Provided Methods

fn get<P>(&mut self) -> Result<P::Value, P::Error> where P: Plugin<Self>, Self: Extensible, P::Value: Clone, P::Value: Any[−]

Return a copy of the plugin's produced value.

The plugin will be created if it doesn't exist already. If plugin creation fails, an error is returned.

P is the plugin type.

fn get_ref<P>(&mut self) -> Result<&P::Value, P::Error> where P: Plugin<Self>, Self: Extensible, P::Value: Any[−]

Return a reference to the plugin's produced value.

The plugin will be created if it doesn't exist already. If plugin creation fails an error is returned.

P is the plugin type.

fn get_mut<P>(&mut self) -> Result<&mut P::Value, P::Error> where P: Plugin<Self>, Self: Extensible, P::Value: Any[−]

Return a mutable reference to the plugin's produced value.

The plugin will be created if it doesn't exist already. If plugin creation fail an error is returned.

P is the plugin type.

fn compute<P>(&mut self) -> Result<P::Value, P::Error> where P: Plugin<Self>[−]

Create and evaluate a once-off instance of a plugin.

Implementors

• impl Plugin for Response
• impl<'a, 'b> Plugin for Request<'a, 'b>
• impl<'a, 'b, P: Key> Plugin<Request<'a, 'b>> for State<P> where P::Value: Send + Sync
• impl<'a, 'b, P: Key> Plugin<Request<'a, 'b>> for Read<P> where P::Value: Send + Sync
• impl<'a, 'b, P: Key> Plugin<Request<'a, 'b>> for Write<P> where P::Value: Send
• impl<'a, 'b> Plugin<Request<'a, 'b>> for Raw
• impl<'a, 'b> Plugin<Request<'a, 'b>> for Json
• impl<'a, 'b, T> Plugin<Request<'a, 'b>> for Struct<T> where T: Deserialize + Any
• impl<'a, 'b> Plugin<Request<'a, 'b>> for UrlEncodedQuery
• impl<'a, 'b> Plugin<Request<'a, 'b>> for UrlEncodedBody
• impl<'a, 'b> Plugin<Request<'a, 'b>> for Params