Struct AnyPtr 

pub struct AnyPtr { /* private fields */ }

A pointer to a Sized type or to a dyn Trait.

modified from: quinedot

Rust has two main type of pointers:

• thin pointer: same size as usize. we store those directly in .data
• fat pointers: they have a data pointer and a vtable pointer.

Unfortunately in fat pointers there is no guerantee on which is first (data or vtable), so we need to check every time.
We store this information as a 1-byte offset in the .meta field.
Vtable pointers are guaranteed to be word-aligned.

Implementations

impl AnyPtr

pub fn from<T: ?Sized>(ptr: *const T) -> Self

Create a type-erased mutable pointer

Panics

If ptr is Null.

pub fn from_mut<T: ?Sized>(ptr: *mut T) -> Self

Create a type-erased pointer

Panics

If ptr is Null.

pub unsafe fn to_ptr<T: ?Sized>(self) -> NonNull<T>

Convert this pointer into a NonNull<T>.

Safety

self MUST have been created by a call to either:

• AnyPtr::of::<T>(ptr)
• AnyPtr::of_mut::<T>(ptr)

Trait Implementations

impl Clone for AnyPtr

fn clone(&self) -> AnyPtr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AnyPtr

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

Formats the value using the given formatter.

impl Copy for AnyPtr