Enum parity_db::Operation

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pub enum Operation<Key, Value> {
    Set(Key, Value),
    Dereference(Key),
    Reference(Key),
}
Expand description

Different operations allowed for a commit. Behavior may differs depending on column configuration.

Variants§

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Set(Key, Value)

Insert or update the value for a given key.

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Dereference(Key)

Dereference at a given key, resulting in either removal of a key value or decrement of its reference count counter.

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Reference(Key)

Increment the reference count counter of an existing value for a given key. If no value exists for the key, this operation is skipped.

Implementations§

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impl<Key, Value> Operation<Key, Value>

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pub fn key(&self) -> &Key

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pub fn into_key(self) -> Key

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impl<K: AsRef<[u8]>, Value> Operation<K, Value>

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pub fn to_key_vec(self) -> Operation<Vec<u8>, Value>

Trait Implementations§

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impl<Key: Debug, Value: Debug> Debug for Operation<Key, Value>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<Key: Ord, Value: Eq> Ord for Operation<Key, Value>

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fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more
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impl<Key: PartialEq, Value: PartialEq> PartialEq<Operation<Key, Value>> for Operation<Key, Value>

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fn eq(&self, other: &Operation<Key, Value>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<Key: Ord, Value: Eq> PartialOrd<Operation<Key, Value>> for Operation<Key, Value>

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fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<Key: Eq, Value: Eq> Eq for Operation<Key, Value>

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impl<Key, Value> StructuralEq for Operation<Key, Value>

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impl<Key, Value> StructuralPartialEq for Operation<Key, Value>

Auto Trait Implementations§

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impl<Key, Value> RefUnwindSafe for Operation<Key, Value>where Key: RefUnwindSafe, Value: RefUnwindSafe,

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impl<Key, Value> Send for Operation<Key, Value>where Key: Send, Value: Send,

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impl<Key, Value> Sync for Operation<Key, Value>where Key: Sync, Value: Sync,

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impl<Key, Value> Unpin for Operation<Key, Value>where Key: Unpin, Value: Unpin,

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impl<Key, Value> UnwindSafe for Operation<Key, Value>where Key: UnwindSafe, Value: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same<T> for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V