Struct wayland_backend::rs::client::ObjectId
source · pub struct ObjectId {
pub(crate) id: InnerObjectId,
}
Expand description
An ID representing a Wayland object
The backend internally tracks which IDs are still valid, invalidates them when the protocol object they
represent is destroyed. As such even though the Wayland protocol reuses IDs, you can confidently compare
two ObjectId
for equality, they will only compare as equal if they both represent the same protocol
object.
Fields§
§id: InnerObjectId
Implementations§
source§impl ObjectId
impl ObjectId
sourcepub fn is_null(&self) -> bool
pub fn is_null(&self) -> bool
Check if this is a null ID
Note: This is not the same as checking if the ID is still valid, which cannot be done without the
Backend
. A null ID is the ID equivalent of a null pointer: it never has been valid and never will
be.
sourcepub fn null() -> ObjectId
pub fn null() -> ObjectId
Create a null object ID
This object ID is always invalid, and should be used as placeholder in requests that create objects,
or for request with an optional Object
argument.
See Backend::send_request()
for details.
Trait Implementations§
source§impl PartialEq for ObjectId
impl PartialEq for ObjectId
impl Eq for ObjectId
impl StructuralPartialEq for ObjectId
Auto Trait Implementations§
impl Freeze for ObjectId
impl RefUnwindSafe for ObjectId
impl Send for ObjectId
impl Sync for ObjectId
impl Unpin for ObjectId
impl UnwindSafe for ObjectId
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.