Enum pour::mutation::Mutation

pub enum Mutation<K, V> {
    Null,
    Remove,
    Insert(K, V),
    Update(V),
}

A mutation to perform at a single key-value pair

Variants

Null

Leave the entry alone

Remove

Remove the entry

Insert(K, V)

Replace only a nonexisting entry with another value

Update(V)

Replace only an existing entry with another value

Implementations

impl<K, V> Mutation<K, V>

pub fn normalize(self, is_empty: bool) -> Mutation<K, V>

Transform an action into the appropriate action for a potentially empty entry

A user usually does not need to worry about this, as it is done automatically with the result of the mutate function

pub fn is_null(&self) -> bool

Check whether an action is null

Trait Implementations

impl<K: Clone, V: Clone> Clone for Mutation<K, V>

fn clone(&self) -> Mutation<K, V>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<K: Copy, V: Copy> Copy for Mutation<K, V>

impl<K: Debug, V: Debug> Debug for Mutation<K, V>

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

Formats the value using the given formatter.

impl<K: Eq, V: Eq> Eq for Mutation<K, V>

impl<K: Hash, V: Hash> Hash for Mutation<K, V>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<K: PartialEq, V: PartialEq> PartialEq<Mutation<K, V>> for Mutation<K, V>

fn eq(&self, other: &Mutation<K, V>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Mutation<K, V>) -> bool

This method tests for !=.

impl<K, V> StructuralEq for Mutation<K, V>

impl<K, V> StructuralPartialEq for Mutation<K, V>