Struct alloc::boxed::BoxStable
[-] [+]
[src]
pub struct Box<T>(_);
A pointer type for heap allocation.
See the module-level documentation for more.
Methods
impl<T> Box<T>
impl<T: ?Sized> Box<T>
unsafe fn from_raw(raw: *mut T) -> Self
Constructs a box from the raw pointer.
After this function call, pointer is owned by resulting box.
In particular, it means that Box destructor calls destructor
of T and releases memory. Since the way Box allocates and
releases memory is unspecified, the only valid pointer to pass
to this function is the one taken from another Box with
boxed::into_raw function.
Function is unsafe, because improper use of this function may lead to memory problems like double-free, for example if the function is called twice on the same raw pointer.
impl Box<Any>
fn downcast<T: Any>(self) -> Result<Box<T>, Box<Any>>
Attempt to downcast the box to a concrete type.
impl Box<Any + Send>
fn downcast<T: Any>(self) -> Result<Box<T>, Box<Any + Send>>
Attempt to downcast the box to a concrete type.
Trait Implementations
impl<T: Default> Default for Box<T>
impl<T> Default for Box<[T]>
impl<T: Clone> Clone for Box<T>
fn clone(&self) -> Box<T>
Returns a new box with a clone() of this box's contents.
Examples
let x = Box::new(5); let y = x.clone();
fn clone_from(&mut self, source: &Box<T>)
Copies source's contents into self without creating a new allocation.
Examples
let x = Box::new(5); let mut y = Box::new(10); y.clone_from(&x); assert_eq!(*y, 5);