Struct vptr::ThinRef

pub struct ThinRef<'a, Trait: ?Sized> { /* fields omitted */ }

A thin reference (size = size_of::<usize>()) to an object implementing the trait Trait

This is like a reference to a trait (&dyn Trait) for struct that used the macro #[vptr(Trait)]

See the crate documentation for example of usage.

The size is only the size of a single pointer:

assert_eq!(mem::size_of::<ThinRef<dyn Trait>>(), mem::size_of::<usize>());
assert_eq!(mem::size_of::<Option<ThinRef<dyn Trait>>>(), mem::size_of::<usize>());

Trait Implementations

impl<'a, Trait: ?Sized> Clone for ThinRef<'a, Trait>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a, Trait: ?Sized + 'a, T: HasVPtr<Trait>> From<&'a T> for ThinRef<'a, Trait>

fn from(f: &'a T) -> Self

Performs the conversion.

impl<'a, Trait: ?Sized> Copy for ThinRef<'a, Trait>

impl<'a, Trait: ?Sized + 'a> Deref for ThinRef<'a, Trait>

type Target = Trait

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a, Trait: ?Sized + 'a> Borrow<Trait> for ThinRef<'a, Trait>

fn borrow(&self) -> &Trait

Immutably borrows from an owned value.