Enum primitives::storage::MptValue

pub enum MptValue<ValueType> {
    None,
    TombStone,
    Some(ValueType),
}

Variants

None

TombStone

Some(ValueType)

Implementations

impl<ValueType: Default> MptValue<ValueType>

pub fn is_some(&self) -> bool

pub fn is_tombstone(&self) -> bool

pub fn into_option(self) -> Option<ValueType>

pub fn take(&mut self) -> Self

pub fn unwrap(self) -> ValueType

Trait Implementations

impl<ValueType: Clone> Clone for MptValue<ValueType>

fn clone(&self) -> MptValue<ValueType>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<ValueType: Debug> Debug for MptValue<ValueType>

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

Formats the value using the given formatter.

impl Decodable for MptValue<H256>

fn decode(rlp: &Rlp<'_>) -> Result<Self, DecoderError>

Decode a value from RLP bytes

impl<'a, ValueType: Deserialize<'a> + From<String>> Deserialize<'a> for MptValue<ValueType>

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'a>,

Deserialize this value from the given Serde deserializer.

impl Encodable for MptValue<H256>

fn rlp_append(&self, s: &mut RlpStream)

Append a value to the stream

fn rlp_bytes(&self) -> Vec<u8>

Get rlp-encoded bytes for this instance

impl<ValueType> From<Option<ValueType>> for MptValue<ValueType>

fn from(opt: Option<ValueType>) -> MptValue<ValueType>

Converts to this type from the input type.

impl<ValueType: PartialEq> PartialEq for MptValue<ValueType>

fn eq(&self, other: &MptValue<ValueType>) -> bool

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

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.

impl<ValueType: Serialize> Serialize for MptValue<ValueType>

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<ValueType> StructuralPartialEq for MptValue<ValueType>