Struct frame_support::traits::GetDefault [−][src]
pub struct GetDefault;
Expand description
Implement Get by returning Default for any type that implements Default.
Trait Implementations
impl<Value> QueryKindTrait<Value, GetDefault> for OptionQuery where
Value: FullCodec + 'static,
impl<Value> QueryKindTrait<Value, GetDefault> for OptionQuery where
Value: FullCodec + 'static,
Metadata for the storage kind.
Convert an optional value (i.e. some if trie contains the value or none otherwise) to the query. Read more
Convert a query to an optional value.
Auto Trait Implementations
impl RefUnwindSafe for GetDefault
impl Send for GetDefault
impl Sync for GetDefault
impl Unpin for GetDefault
impl UnwindSafe for GetDefault
Blanket Implementations
Mutably borrows from an owned value. Read more
impl<T> Downcast for T where
T: Any,
impl<T> Downcast for T where
T: Any,
Convert 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
. Read more
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert &mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s. Read more
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
type Output = T
type Output = T
Should always be Self
The counterpart to unchecked_from
.
Consume self to return an equivalent value of T
.
pub fn vzip(self) -> V