Struct EmptyBox

pub struct EmptyBox<T> { /* private fields */ }

An “emptied” Box. Constructed via EmptyBox::take(), an EmptyBox<T> is a Box from which the contents have been moved. This allows for reuse of the Box via EmptyBox::put(), which moves the contents back in, turning the EmptyBox back into a Box<T>.

Implementations

impl<T> EmptyBox<T>

pub fn take(bx: Box<T>) -> (T, EmptyBox<T>)

Move the value out of the Box, creating a T and an EmptyBox which preserves the original Box’s allocation.

pub fn put(self, t: T) -> Box<T>

Restore a value to an EmptyBox, creating a new Box and reusing the allocation of whatever Box was destroyed to create the EmptyBox.

Trait Implementations

impl<T> Drop for EmptyBox<T>

fn drop(&mut self)

Executes the destructor for this type.