Trait Extension

pub trait Extension:
    Serialize
    + DeserializeOwned
    + Clone {
    type Forks: IsForks;

    // Required methods
    fn get<T: 'static>(&self) -> Option<&T>;
    fn get_any(&self, t: TypeId) -> &dyn Any;
    fn get_any_mut(&mut self, t: TypeId) -> &mut dyn Any;

    // Provided method
    fn forks<BlockNumber, T>(&self) -> Option<Forks<BlockNumber, T>>
       where BlockNumber: Ord + Clone + 'static,
             T: Group + 'static,
             <Self::Forks as IsForks>::Extension: Extension,
             <<Self::Forks as IsForks>::Extension as Group>::Fork: Extension { ... }
}

A collection of ChainSpec extensions.

This type can be passed around and allows the core modules to request a strongly-typed, but optional configuration.

Required Associated Types

type Forks: IsForks

Required Methods

fn get<T: 'static>(&self) -> Option<&T>

Get an extension of specific type.

fn get_any(&self, t: TypeId) -> &dyn Any

Get an extension of specific type as reference to Any.

fn get_any_mut(&mut self, t: TypeId) -> &mut dyn Any

Get an extension of specific type as mutable reference to Any.

Provided Methods

fn forks<BlockNumber, T>(&self) -> Option<Forks<BlockNumber, T>>

where BlockNumber: Ord + Clone + 'static, T: Group + 'static, <Self::Forks as IsForks>::Extension: Extension, <<Self::Forks as IsForks>::Extension as Group>::Fork: Extension,

Get forkable extensions of specific type.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl Extension for NoExtension

type Forks = Option<()>

impl<B, E> Extension for Forks<B, E>

where B: Serialize + DeserializeOwned + Ord + Clone + 'static, E: Extension + Group + 'static,

type Forks = Forks<B, E>