Struct vtable::VRefMut

#[repr(transparent)]pub struct VRefMut<'a, T: ?Sized + VTableMeta> { /* fields omitted */ }

VRefMut<'a MyTraitVTable> can be thought as a &'a mut dyn MyTrait

It will dereference to a structure that has the same members as MyTrait.

Implementations

impl<'a, T: ?Sized + VTableMeta> VRefMut<'a, T>

pub fn new<X: HasStaticVTable<T>>(value: &'a mut X) -> Self

Create a new VRef from a mutable reference of a type that can be associated with a VTable.

(the HasStaticVTable is implemented by the “MyTrait”VTable_static! macro generated by the #vtable macro)

pub unsafe fn from_raw(vtable: NonNull<T::VTable>, ptr: NonNull<u8>) -> Self

Safety: the ptr needs to be a valid for the vtable, and properly allocated so it can be dropped

pub fn borrow<'b>(&'b self) -> VRef<'b, T>

Borrow this to obtain a VRef.

pub fn borrow_mut<'b>(&'b mut self) -> VRefMut<'b, T>

Borrow this to obtain a new VRefMut.

pub fn into_ref(self) -> VRef<'a, T>

Create a VRef with the same lifetime as the original lifetime.

pub fn downcast<X: HasStaticVTable<T>>(&mut self) -> Option<&mut X>

Return a reference of the given type if the type is matching.

Trait Implementations

impl<'a, T: ?Sized + VTableMeta> Deref for VRefMut<'a, T>

type Target = T::Target

The resulting type after dereferencing.

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

Dereferences the value.

impl<'a, T: ?Sized + VTableMeta> DerefMut for VRefMut<'a, T>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.