Struct cxx::WeakPtr

#[repr(C)]pub struct WeakPtr<T> where
    T: WeakPtrTarget,  { /* fields omitted */ }

Binding to C++ std::weak_ptr<T>.

The typical way to construct a WeakPtr from Rust is by downgrading from a SharedPtr.

Implementations

impl<T> WeakPtr<T> where
    T: WeakPtrTarget, 

pub fn null() -> Self

Makes a new WeakPtr wrapping a null pointer.

Matches the behavior of default-constructing a std::weak_ptr.

pub fn upgrade(&self) -> SharedPtr<T> where
    T: SharedPtrTarget, 

Upgrades a non-owning reference into an owning reference if possible, otherwise to a null reference.

Matches the behavior of std::weak_ptr<T>::lock.

Trait Implementations

impl<T> Clone for WeakPtr<T> where
    T: WeakPtrTarget, 

fn clone(&self) -> Self

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for WeakPtr<T> where
    T: Debug + WeakPtrTarget + SharedPtrTarget, 

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> Drop for WeakPtr<T> where
    T: WeakPtrTarget, 

fn drop(&mut self)

Executes the destructor for this type.

impl<T> Send for WeakPtr<T> where
    T: Send + Sync + WeakPtrTarget, 

impl<T> Sync for WeakPtr<T> where
    T: Send + Sync + WeakPtrTarget,