pub trait Userdata: Any + Traverseable + Debug + Send + Sync {
fn deep_clone(
&self,
deep_cloner: &mut Cloner<'_>
) -> Result<GcPtr<Box<dyn Userdata>>> { ... }
}
Provided Methods
Implementations
sourceimpl dyn Userdata
impl dyn Userdata
sourcepub fn downcast_ref<T: Userdata>(&self) -> Option<&T>
pub fn downcast_ref<T: Userdata>(&self) -> Option<&T>
Returns some reference to the boxed value if it is of type T
, or
None
if it isn’t.
sourcepub unsafe fn downcast_ref_unchecked<T: Userdata>(&self) -> &T
pub unsafe fn downcast_ref_unchecked<T: Userdata>(&self) -> &T
Returns a reference to the boxed value, blindly assuming it to be of type T
.
If you are not absolutely certain of T
, you must not call this.
sourcepub fn downcast_mut<T: Userdata>(&mut self) -> Option<&mut T>
pub fn downcast_mut<T: Userdata>(&mut self) -> Option<&mut T>
Returns some mutable reference to the boxed value if it is of type T
, or
None
if it isn’t.
sourcepub unsafe fn downcast_mut_unchecked<T: Userdata>(&mut self) -> &mut T
pub unsafe fn downcast_mut_unchecked<T: Userdata>(&mut self) -> &mut T
Returns a mutable reference to the boxed value, blindly assuming it to be of type T
.
If you are not absolutely certain of T
, you must not call this.
sourceimpl dyn Userdata
impl dyn Userdata
sourcepub fn downcast<T: Userdata>(self: Box<Self>) -> Result<Box<T>, Box<Self>>
pub fn downcast<T: Userdata>(self: Box<Self>) -> Result<Box<T>, Box<Self>>
Returns the boxed value if it is of type T
, or Err(Self)
if it isn’t.
sourcepub unsafe fn downcast_unchecked<T: Userdata>(self: Box<Self>) -> Box<T>
pub unsafe fn downcast_unchecked<T: Userdata>(self: Box<Self>) -> Box<T>
Returns the boxed value, blindly assuming it to be of type T
.
If you are not absolutely certain of T
, you must not call this.