Trait dfdi_core::Provider

pub trait Provider<'cx, S: Service>: 'cx {
    fn provide(&'cx self, cx: &'cx Context<'_>) -> S::Output<'cx>;
}

A can construct a Service which references objects either inside itself or the provided Context.

Any type implementing the appropriate Fn trait can be used as a provider:

// A service providing a random number
#[derive(Service)]
struct Random(u64);

// Create a context and bind Random to a provider
let mut cx = Context::new();
cx.bind_fn::<Random>(|_cx: &Context| Random(rand::random()));

// Print a random number
println!("{}", cx.resolve::<Random>().0);

Required Methods

fn provide(&'cx self, cx: &'cx Context<'_>) -> S::Output<'cx>

Build the output object

Implementations on Foreign Types

impl<'cx, S, P> Provider<'cx, Option<S>> for Option<P>where
    S: Service,
    P: Provider<'cx, S>,

fn provide(&'cx self, cx: &'cx Context<'_>) -> Option<S::Output<'cx>>

Implementors

impl<'cx, F, S> Provider<'cx, S> for Fwhere
    F: Fn(&'cx Context<'_>) -> S::Output<'cx> + 'cx,
    S: Service,

Allow Fn functions to act as providers.