Struct take_mut::scoped::Hole

source · 
pub struct Hole<'c, 'm, T: 'm, F: FnOnce() -> T> { /* private fields */ }
Expand description

A Hole<'c, 'm, T, F> represents an unfilled &'m mut T which must be filled before the end of the Scope with lifetime 'c and recovery closure F.

An unfilled Hole<'c, 'm, T, F> that is destructed will try to use F` to fill the hole.

If the scope ends without the Hole being filled, the program will std::process::abort().

Implementations§

source§

impl<'c, 'm, T: 'm, F: FnOnce() -> T> Hole<'c, 'm, T, F>

source

pub fn fill(self, t: T)

Fills the Hole.

Trait Implementations§

source§

impl<'c, 'm, T: 'm, F: FnOnce() -> T> Drop for Hole<'c, 'm, T, F>

source§

fn drop(&mut self)

Executes the destructor for this type. Read more

Auto Trait Implementations§

§

impl<'c, 'm, T, F> Freeze for Hole<'c, 'm, T, F>
where F: Freeze,

§

impl<'c, 'm, T, F> !RefUnwindSafe for Hole<'c, 'm, T, F>

§

impl<'c, 'm, T, F> !Send for Hole<'c, 'm, T, F>

§

impl<'c, 'm, T, F> !Sync for Hole<'c, 'm, T, F>

§

impl<'c, 'm, T, F> Unpin for Hole<'c, 'm, T, F>
where F: Unpin,

§

impl<'c, 'm, T, F> !UnwindSafe for Hole<'c, 'm, T, F>

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

§

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>,

§

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.