Struct lazy_init::LazyInit

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

A wrapper of a lazy initialized value.

It implements Deref and DerefMut. The caller must use the dereference operation after initialization, otherwise it will panic.

Implementations

impl<T> LazyInit<T>

pub const fn new() -> Self

Creates a new uninitialized value.

pub fn init_by(&self, data: T)

Initializes the value.

Panics

Panics if the value is already initialized.

pub fn is_init(&self) -> bool

Checks whether the value is initialized.

pub fn try_get(&self) -> Option<&T>

Gets a reference to the value.

Returns None if the value is not initialized.

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

Gets the reference to the value without checking if it is initialized.

Safety

Must be called after initialization.

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

Get a mutable reference to the value without checking if it is initialized.

Safety

Must be called after initialization.

Trait Implementations

impl<T: Debug> Debug for LazyInit<T>

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

Formats the value using the given formatter.

impl<T> Deref for LazyInit<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T> DerefMut for LazyInit<T>

fn deref_mut(&mut self) -> &mut T

Mutably dereferences the value.

impl<T> Drop for LazyInit<T>

fn drop(&mut self)

Executes the destructor for this type.

impl<T: Send> Send for LazyInit<T>

impl<T: Send + Sync> Sync for LazyInit<T>