Struct supercow::ext::BoxedStorage

pub struct BoxedStorage;

Causes the OWNED or SHARED value of a Supercow to be stored in a Box.

This makes allocation of owned Supercows more expensive, but incurs zero space overhead within the Supercow. It also results in a faster Deref implementation.

Trait Implementations

impl Debug for BoxedStorage

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for BoxedStorage

fn clone(&self) -> BoxedStorage

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for BoxedStorage

impl Default for BoxedStorage

fn default() -> BoxedStorage

Returns the "default value" for a type.

impl<A, B> OwnedStorage<A, B> for BoxedStorage

fn allocate_a(&mut self, value: A) -> *mut ()

Allocates the given owned value.

fn allocate_b(&mut self, value: B) -> *mut ()

See allocate_a.

unsafe fn get_ptr_a<'a>(&'a self, ptr: *mut ()) -> &'a A

Extracts the immutable reference from the saved pointer and storage.

unsafe fn get_ptr_b<'a>(&'a self, ptr: *mut ()) -> &'a B

See get_ptr_a.

unsafe fn get_mut_a<'a>(&'a mut self, ptr: *mut ()) -> &'a mut A

Extracts the mutable reference from the saved pointer and storage.

unsafe fn get_mut_b<'a>(&'a mut self, ptr: *mut ()) -> &'a mut B

See get_mut_a.

unsafe fn deallocate_a(&mut self, ptr: *mut ())

Releases any allocations that would not be released by Stored being dropped.

unsafe fn deallocate_b(&mut self, ptr: *mut ())

See deallocate_b.

unsafe fn deallocate_into_a(&mut self, ptr: *mut ()) -> A

Like deallocate_a(), but also return the owned value.

unsafe fn deallocate_into_b(&mut self, ptr: *mut ()) -> B

See deallocate_into_a.

fn is_internal_storage() -> bool

Returns whether this storage implementation ever causes the owned object to be stored internally to the Supercow.