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RetainBuilder

blazinterner

Struct RetainBuilder 

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pub struct RetainBuilder<T: ?Sized, Storage = T> { /* private fields */ }
Available on crate feature retain only.
Expand description

A builder to select items to retain in an Arena.

This struct is created by the retain_builder() method on Arena.

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impl<T: ?Sized, Storage> RetainBuilder<T, Storage>

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pub fn insert(&mut self, value: Interned<T, Storage>) -> bool

Marks the given item as retained.

Returns true if the item is newly inserted and false if it was already inserted before.

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pub fn build(self) -> Mapping

Returns a mapping to build an Arena containing only the items that have been retained via insert().

Auto Trait Implementations§

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impl<T, Storage> Freeze for RetainBuilder<T, Storage>
where T: ?Sized,

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impl<T, Storage> RefUnwindSafe for RetainBuilder<T, Storage>
where T: ?Sized,

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impl<T, Storage> Send for RetainBuilder<T, Storage>
where T: ?Sized,

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impl<T, Storage> Sync for RetainBuilder<T, Storage>
where T: ?Sized,

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impl<T, Storage> Unpin for RetainBuilder<T, Storage>
where T: ?Sized,

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impl<T, Storage> UnsafeUnpin for RetainBuilder<T, Storage>
where T: ?Sized,

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impl<T, Storage> UnwindSafe for RetainBuilder<T, Storage>
where T: ?Sized,

Blanket Implementations§

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impl<T> Any for T
where 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 T
where 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 T
where 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 T
where 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 T
where 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 T
where 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.