pub enum MaybeBoxed<'a, B: 'a + ?Sized> {
    Borrowed(&'a B),
    Boxed(Box<B>),
}
Expand description

An optionally-owning (boxed) reference

This is related but not identical to Cow.

Variants§

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Borrowed(&'a B)

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Boxed(Box<B>)

Trait Implementations§

Converts this type into a shared reference of the (usually inferred) input type.

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Cast from Self to T Read more
Try converting from Self to T Read more
Try approximate conversion from Self to T Read more
Cast approximately from Self to T Read more
Cast to integer, truncating Read more
Cast to the nearest integer Read more
Cast the floor to an integer Read more
Cast the ceiling to an integer Read more
Try converting to integer with truncation Read more
Try converting to the nearest integer Read more
Try converting the floor to an integer Read more
Try convert the ceiling to an integer Read more

Returns the argument unchanged.

Calls U::from(self).

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

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.