Trait StateReads 

pub trait StateReads: Send + Sync {
    type Error: Debug + Display + Send;
    type Pre: StateRead<Error = Self::Error>;
    type Post: StateRead<Error = Self::Error>;

    // Required methods
    fn pre(&self) -> &Self::Pre;
    fn post(&self) -> &Self::Post;
}

Pre and post sync state reads.

Required Associated Types

type Error: Debug + Display + Send

Common error type

type Pre: StateRead<Error = Self::Error>

Pre state read

type Post: StateRead<Error = Self::Error>

Post state read

Required Methods

fn pre(&self) -> &Self::Pre

Get the pre state read

fn post(&self) -> &Self::Post

Get the post state read

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl<S, P> StateReads for (S, P)

where S: StateRead, P: StateRead<Error = S::Error>, S::Error: Send,

type Error = <S as StateRead>::Error

type Pre = S

type Post = P

fn pre(&self) -> &Self::Pre

fn post(&self) -> &Self::Post

Implementors