Trait ContextProvides 

pub trait ContextProvides<V> {
    // Required method
    fn provide(&self) -> &V;
}

Signals that the context statically provides a certain type.

Writables may require this bound upon the output’s context in order to implement themselves. A context that is calculated at runtime should implement ContextProvides<T> for all T, and panic at runtime if a value is called that is not present. A context that is calculated statically should implement this trait only for the types it is statically known to provide.

Required Methods

fn provide(&self) -> &V

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl<'c, C, V> ContextProvides<V> for &'c C

where C: ContextProvides<V>,

fn provide(&self) -> &V

Implementors

impl<V> ContextProvides<V> for DynContext

where V: 'static,

impl<V> ContextProvides<V> for SingularContext<V>