pub struct TrappedFlag { /* private fields */ }
Expand description

An RAII trap that ensures a drop flag is correctly cleared.

This type is similar to a DroppingFlag, except that it does not wrap a value and rather than leaking memory aborts the program if its flag is not cleared.

This type is useful for safely constructing MoveRefs.

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impl TrappedFlag

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pub fn new() -> Self

Creates a new trap with a dead flag.

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pub fn flag(&self) -> DropFlag<'_>

Returns a reference to the DropFlag.

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pub fn assert_cleared(&self)

Preemptively checks that this flag has been cleared.

Aborts (rather than panicking!) if the assertion fails.

Trait Implementations§

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impl Default for TrappedFlag

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Drop for TrappedFlag

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fn drop(&mut self)

Executes the destructor for this type. Read more

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.