Struct Maybe

pub struct Maybe<T> { /* private fields */ }

Equivalent to an UnsafeCell<MaybeUninit<T>>, this cell may hold uninitialized data.

Implementations

impl<T> Maybe<T>

pub const fn empty() -> Self

Create a new, empty Maybe<T>.

pub const fn new(data: T) -> Self

Create a new, populated Maybe<T>.

pub unsafe fn as_ptr(&self) -> *const T

Access the contained value as a constant pointer.

pub unsafe fn as_mut_ptr(&mut self) -> *mut T

Access the contained value as a mutable pointer.

pub unsafe fn as_ref(&self) -> &T

Obtain a reference to the contained value. This method is unsafe because the value may not have been initialized.

pub unsafe fn as_mut(&mut self) -> &mut T

Obtain a mutable reference to the contained value.

pub fn set_loaded(&self, loaded: bool)

Override the loaded flag of the cell. This method is a no-op when using the unchecked implementation. It may be used when a value is inserted manually, for example by assigning to the dereferenced pointer.

pub unsafe fn clear(&self)

Drop the contained value in place.

pub unsafe fn load(&self) -> T

Load the contained value.

pub unsafe fn replace(&self, value: T) -> T

Store a new value in an occupied cell.

pub unsafe fn store(&self, value: T)

Store a new value in an empty cell.

Trait Implementations

impl<T: Debug> Debug for Maybe<T>

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

Formats the value using the given formatter.

impl<T> Drop for Maybe<T>

fn drop(&mut self)

Executes the destructor for this type.

impl<T> From<T> for Maybe<T>

fn from(value: T) -> Self

Converts to this type from the input type.