pub enum StorageEntryModifierIR {
Optional,
Default,
}
Expand description
A storage entry modifier indicates how a storage entry is returned when fetched and what the value will be if the key is not present. Specifically this refers to the “return type” when fetching a storage entry, and what the value will be if the key is not present.
Optional
means you should expect an Option<T>
, with None
returned if the key is not
present. Default
means you should expect a T
with the default value of default if the key is
not present.
Variants§
Optional
The storage entry returns an Option<T>
, with None
if the key is not present.
Default
The storage entry returns T::Default
if the key is not present.
Trait Implementations§
source§impl Clone for StorageEntryModifierIR
impl Clone for StorageEntryModifierIR
source§fn clone(&self) -> StorageEntryModifierIR
fn clone(&self) -> StorageEntryModifierIR
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for StorageEntryModifierIR
impl Debug for StorageEntryModifierIR
source§impl Encode for StorageEntryModifierIR
impl Encode for StorageEntryModifierIR
source§fn encode_to<__CodecOutputEdqy: Output + ?Sized>(
&self,
__codec_dest_edqy: &mut __CodecOutputEdqy
)
fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy )
Convert self to a slice and append it to the destination.
source§fn size_hint(&self) -> usize
fn size_hint(&self) -> usize
If possible give a hint of expected size of the encoding. Read more
source§fn using_encoded<R, F>(&self, f: F) -> Rwhere
F: FnOnce(&[u8]) -> R,
fn using_encoded<R, F>(&self, f: F) -> Rwhere F: FnOnce(&[u8]) -> R,
Convert self to a slice and then invoke the given closure with it.
source§fn encoded_size(&self) -> usize
fn encoded_size(&self) -> usize
Calculates the encoded size. Read more
source§impl From<StorageEntryModifierIR> for StorageEntryModifier
impl From<StorageEntryModifierIR> for StorageEntryModifier
source§fn from(ir: StorageEntryModifierIR) -> Self
fn from(ir: StorageEntryModifierIR) -> Self
Converts to this type from the input type.
source§impl PartialEq<StorageEntryModifierIR> for StorageEntryModifierIR
impl PartialEq<StorageEntryModifierIR> for StorageEntryModifierIR
source§fn eq(&self, other: &StorageEntryModifierIR) -> bool
fn eq(&self, other: &StorageEntryModifierIR) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.impl EncodeLike<StorageEntryModifierIR> for StorageEntryModifierIR
impl Eq for StorageEntryModifierIR
impl StructuralEq for StorageEntryModifierIR
impl StructuralPartialEq for StorageEntryModifierIR
Auto Trait Implementations§
impl RefUnwindSafe for StorageEntryModifierIR
impl Send for StorageEntryModifierIR
impl Sync for StorageEntryModifierIR
impl Unpin for StorageEntryModifierIR
impl UnwindSafe for StorageEntryModifierIR
Blanket Implementations§
source§impl<T> CheckedConversion for T
impl<T> CheckedConversion for T
§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere T: Any,
§fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>
fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>
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
.§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
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
.§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
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.source§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.§impl<Q, K> Equivalent<K> for Qwhere
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Checks if this value is equivalent to the given key. Read more
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T, Outer> IsWrappedBy<Outer> for Twhere
Outer: AsRef<T> + AsMut<T> + From<T>,
T: From<Outer>,
impl<T, Outer> IsWrappedBy<Outer> for Twhere Outer: AsRef<T> + AsMut<T> + From<T>, T: From<Outer>,
source§impl<T> SaturatedConversion for T
impl<T> SaturatedConversion for T
source§fn saturated_from<T>(t: T) -> Selfwhere
Self: UniqueSaturatedFrom<T>,
fn saturated_from<T>(t: T) -> Selfwhere Self: UniqueSaturatedFrom<T>,
source§fn saturated_into<T>(self) -> Twhere
Self: UniqueSaturatedInto<T>,
fn saturated_into<T>(self) -> Twhere Self: UniqueSaturatedInto<T>,
Consume self to return an equivalent value of
T
. Read moresource§impl<S, T> UncheckedInto<T> for Swhere
T: UncheckedFrom<S>,
impl<S, T> UncheckedInto<T> for Swhere T: UncheckedFrom<S>,
source§fn unchecked_into(self) -> T
fn unchecked_into(self) -> T
The counterpart to
unchecked_from
.source§impl<T, S> UniqueSaturatedInto<T> for Swhere
T: Bounded,
S: TryInto<T>,
impl<T, S> UniqueSaturatedInto<T> for Swhere T: Bounded, S: TryInto<T>,
source§fn unique_saturated_into(self) -> T
fn unique_saturated_into(self) -> T
Consume self to return an equivalent value of
T
.