Trait Extension 

pub trait Extension {
    // Required method
    fn extend<'life0, 'life1, 'async_trait>(
        &'life0 mut self,
        request: &'life1 (dyn Request + Sync),
    ) -> Pin<Box<dyn Future<Output = Result<Extensions, ()>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
}

A system of addons provided additional data.

An endpoint not having any extension may use &mut () as the result of system.

Required Methods

fn extend<'life0, 'life1, 'async_trait>( &'life0 mut self, request: &'life1 (dyn Request + Sync), ) -> Pin<Box<dyn Future<Output = Result<Extensions, ()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Inspect the request to produce extension data.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl Extension for ()

fn extend<'life0, 'life1, 'async_trait>( &'life0 mut self, _: &'life1 (dyn Request + Sync), ) -> Pin<Box<dyn Future<Output = Result<Extensions, ()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

impl Extension for AddonList

fn extend<'life0, 'life1, 'async_trait>( &'life0 mut self, request: &'life1 (dyn Request + Sync), ) -> Pin<Box<dyn Future<Output = Result<Extensions, ()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Implementors