Enum Operation

pub enum Operation<T> {
    None,
    Clear,
    Set(T),
}

Three-state operation that allows the ability to set, clear or do nothing with a value. Useful to use in lieu of an Option when the None variant could be ambiguous about whether to clear or do nothing.

Variants

None

Clear

Set(T)

Implementations

impl<T> Operation<T>

pub fn is_none(&self) -> bool

pub fn is_clear(&self) -> bool

pub fn is_set(&self) -> bool

pub fn value(&self) -> Option<&T>

pub fn into_value(self) -> Option<T>

Trait Implementations

impl<T> BorshDeserialize for Operation<T>

where T: BorshDeserialize,

fn deserialize_reader<R: Read>(reader: &mut R) -> Result<Self, Error>

fn deserialize(buf: &mut &[u8]) -> Result<Self, Error>

Deserializes this instance from a given slice of bytes. Updates the buffer to point at the remaining bytes.

fn try_from_slice(v: &[u8]) -> Result<Self, Error>

Deserialize this instance from a slice of bytes.

fn try_from_reader<R>(reader: &mut R) -> Result<Self, Error>

where R: Read,

impl<T> BorshSerialize for Operation<T>

where T: BorshSerialize,

fn serialize<W: Write>(&self, writer: &mut W) -> Result<(), Error>

fn try_to_vec(&self) -> Result<Vec<u8>, Error>

Serialize this instance into a vector of bytes.

impl<T: Clone> Clone for Operation<T>

fn clone(&self) -> Operation<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Operation<T>

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

Formats the value using the given formatter.

impl<T> EnumExt for Operation<T>

where T: BorshDeserialize,

fn deserialize_variant<R: Read>( reader: &mut R, variant_idx: u8, ) -> Result<Self, Error>

Deserialises given variant of an enum from the reader.

impl<T: Hash> Hash for Operation<T>

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: PartialEq> PartialEq for Operation<T>

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Eq> Eq for Operation<T>

impl<T> StructuralPartialEq for Operation<T>