Trait Metadata 

pub trait Metadata {
    // Required method
    fn access<F, R>(&self, f: F) -> R
       where F: FnOnce(&Node<'_>) -> R;
}

A trait for types that can provide access to a Node for the purpose of metadata retrieval.

Required Methods

fn access<F, R>(&self, f: F) -> R

where F: FnOnce(&Node<'_>) -> R,

Access the Node associated with this metadata provider.

Arguments

• f: A closure that takes a reference to a Node and returns a value of type R.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

impl<M, H> Metadata for (M, H)

where M: Metadata,

fn access<F, R>(&self, f: F) -> R

where F: FnOnce(&Node<'_>) -> R,

impl<T> Metadata for &T

where T: Metadata,

fn access<F, R>(&self, f: F) -> R

where F: FnOnce(&Node<'_>) -> R,

Implementors

impl Metadata for Node<'_>

impl<T> Metadata for Async<T>

where T: Metadata,