Trait Weak 

pub trait Weak: Sealed {
    type A: ?Sized;
    type Strong: Ptr<A = Self::A, Weak = Self>;

    // Required methods
    fn upgrade_ptr(&self) -> Option<Self::Strong>;
    fn value(&self) -> *const Self::A;
    fn is_alive(&self) -> bool;
}

Required Associated Types

type A: ?Sized

type Strong: Ptr<A = Self::A, Weak = Self>

Required Methods

fn upgrade_ptr(&self) -> Option<Self::Strong>

fn value(&self) -> *const Self::A

fn is_alive(&self) -> bool

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl<A: ?Sized> Weak for Weak<A>

type A = A

type Strong = Rc<A>

fn upgrade_ptr(&self) -> Option<Self::Strong>

fn value(&self) -> *const A

fn is_alive(&self) -> bool

impl<A: ?Sized> Weak for Weak<A>

type A = A

type Strong = Arc<A>

fn upgrade_ptr(&self) -> Option<Self::Strong>

fn value(&self) -> *const A

fn is_alive(&self) -> bool

Implementors