Trait WithValue 

pub trait WithValue: DefinedAt {
    type Value: ?Sized;

    // Required method
    fn try_with_value<U>(
        &self,
        fun: impl FnOnce(&Self::Value) -> U,
    ) -> Option<U>;

    // Provided method
    fn with_value<U>(&self, fun: impl FnOnce(&Self::Value) -> U) -> U { ... }
}

A variation of the With trait that provides a signposted “always-non-reactive” API. E.g. for StoredValue.

Required Associated Types

type Value: ?Sized

The type of the value contained in the value.

Required Methods

fn try_with_value<U>(&self, fun: impl FnOnce(&Self::Value) -> U) -> Option<U>

Applies the closure to the value, non-reactively, and returns the result, or None if the value has already been disposed.

Provided Methods

fn with_value<U>(&self, fun: impl FnOnce(&Self::Value) -> U) -> U

Applies the closure to the value, non-reactively, and returns the result.

Panics

Panics if you try to access a value that has been disposed.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors

impl<T> WithValue for T

where T: DefinedAt + ReadValue,

type Value = <<T as ReadValue>::Value as Deref>::Target