[−][src]Struct sp_state_machine::OverlayedChanges
The overlayed changes to state to be queried on top of the backend.
A transaction shares all prospective changes within an inner overlay that can be cleared.
Methods
impl OverlayedChanges[src]
pub fn is_empty(&self) -> bool[src]
Whether the overlayed changes are empty.
pub fn storage(&self, key: &[u8]) -> Option<Option<&[u8]>>[src]
Returns a double-Option: None if the key is unknown (i.e. and the query should be refered to the backend); Some(None) if the key has been deleted. Some(Some(...)) for a key whose value has been set.
pub fn child_storage(
&self,
storage_key: &[u8],
key: &[u8]
) -> Option<Option<&[u8]>>[src]
&self,
storage_key: &[u8],
key: &[u8]
) -> Option<Option<&[u8]>>
Returns a double-Option: None if the key is unknown (i.e. and the query should be refered to the backend); Some(None) if the key has been deleted. Some(Some(...)) for a key whose value has been set.
pub fn discard_prospective(&mut self)[src]
Discard prospective changes to state.
pub fn commit_prospective(&mut self)[src]
Commit prospective changes to state.
pub fn into_committed(
self
) -> (impl Iterator<Item = (Vec<u8>, Option<Vec<u8>>)>, impl Iterator<Item = (Vec<u8>, (impl Iterator<Item = (Vec<u8>, Option<Vec<u8>>)>, OwnedChildInfo))>)[src]
self
) -> (impl Iterator<Item = (Vec<u8>, Option<Vec<u8>>)>, impl Iterator<Item = (Vec<u8>, (impl Iterator<Item = (Vec<u8>, Option<Vec<u8>>)>, OwnedChildInfo))>)
Consume OverlayedChanges and take committed set.
Panics: Will panic if there are any uncommitted prospective changes.
pub fn child_info(&self, storage_key: &[u8]) -> Option<&OwnedChildInfo>[src]
Get child info for a storage key. Take the latest value so prospective first.
pub fn next_storage_key_change(
&self,
key: &[u8]
) -> Option<(&[u8], &OverlayedValue)>[src]
&self,
key: &[u8]
) -> Option<(&[u8], &OverlayedValue)>
Returns the next (in lexicographic order) storage key in the overlayed alongside its value.
If no value is next then None is returned.
pub fn next_child_storage_key_change(
&self,
storage_key: &[u8],
key: &[u8]
) -> Option<(&[u8], &OverlayedValue)>[src]
&self,
storage_key: &[u8],
key: &[u8]
) -> Option<(&[u8], &OverlayedValue)>
Returns the next (in lexicographic order) child storage key in the overlayed alongside its
value. If no value is next then None is returned.
Trait Implementations
impl Clone for OverlayedChanges[src]
fn clone(&self) -> OverlayedChanges[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Debug for OverlayedChanges[src]
impl Default for OverlayedChanges[src]
fn default() -> OverlayedChanges[src]
Auto Trait Implementations
impl RefUnwindSafe for OverlayedChanges
impl Send for OverlayedChanges
impl Sync for OverlayedChanges
impl Unpin for OverlayedChanges
impl UnwindSafe for OverlayedChanges
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T[src]
impl<T> Clear for T where
T: InitializableFromZeroed + ?Sized, [src]
T: InitializableFromZeroed + ?Sized,
impl<T> From<T> for T[src]
impl<T> InitializableFromZeroed for T where
T: Default, [src]
T: Default,
unsafe fn initialize(place: *mut T)[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T, Outer> IsWrappedBy<Outer> for T where
Outer: AsRef<T> + AsMut<T> + From<T>,
T: From<Outer>, [src]
Outer: AsRef<T> + AsMut<T> + From<T>,
T: From<Outer>,
fn from_ref(outer: &Outer) -> &T[src]
Get a reference to the inner from the outer.
fn from_mut(outer: &mut Outer) -> &mut T[src]
Get a mutable reference to the inner from the outer.
impl<T> MaybeDebug for T where
T: Debug, [src]
T: Debug,
impl<T> MaybeDebug for T where
T: Debug, [src]
T: Debug,
impl<T> MaybeDebug for T where
T: Debug, [src]
T: Debug,
impl<T> Same<T> for T[src]
type Output = T
Should always be Self
impl<T> ToOwned for T where
T: Clone, [src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T[src]
fn clone_into(&self, target: &mut T)[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
impl<S, T> UncheckedInto<T> for S where
T: UncheckedFrom<S>, [src]
T: UncheckedFrom<S>,
fn unchecked_into(self) -> T[src]
impl<V, T> VZip<V> for T where
V: MultiLane<T>, [src]
V: MultiLane<T>,