embedded_threadsafe_rp2040

Struct LazyCell

Source 
pub struct LazyCell<T, I = fn() -> T> { /* private fields */ }
Expand description

A lazily instantiated cell

Implementations§

Source§

impl<T, I> LazyCell<T, I>

Source

pub const fn new(init: I) -> LazyCell<T, I>

Creates a new lazy cell with the given initializer

Source

pub unsafe fn scope<F, FR>(&self, scope: F) -> FR
where I: FnOnce() -> T, F: FnOnce(&mut T) -> FR,

Provides scoped access to the underlying value, initializes it if necessary

§Safety

This function provides unchecked, mutable access to the underlying value, so incorrect use of this function may lead to race conditions or undefined behavior.

Source

pub fn scope_mut<F, FR>(&self, scope: F) -> FR
where I: FnOnce() -> T, F: FnOnce(&mut T) -> FR,

Provides scoped access to the underlying value, initializes it if necessary

Auto Trait Implementations§

§

impl<T, I = fn() -> T> !Freeze for LazyCell<T, I>

§

impl<T, I = fn() -> T> !RefUnwindSafe for LazyCell<T, I>

§

impl<T, I> Send for LazyCell<T, I>
where I: Send, T: Send,

§

impl<T, I = fn() -> T> !Sync for LazyCell<T, I>

§

impl<T, I> Unpin for LazyCell<T, I>
where I: Unpin, T: Unpin,

§

impl<T, I> UnwindSafe for LazyCell<T, I>
where I: UnwindSafe, T: UnwindSafe,

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

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

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T> IntoEither for T

Source§

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
Source§

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.