Enum MaybeHashed

pub enum MaybeHashed<T, Hash> {
    Value(T),
    Hash(Hash),
}

Type representing an encodable value or the hash of the encoding of such a value.

Variants

Value(T)

The value itself.

Hash(Hash)

The hash of the encoded value which this value represents.

Implementations

impl<T: Decode, H> MaybeHashed<T, H>

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

pub fn as_hash(&self) -> Option<&H>

pub fn ensure_requested<P: PreimageProvider<H>>(&self)

pub fn ensure_unrequested<P: PreimageProvider<H>>(&self)

pub fn resolved<P: PreimageProvider<H>>(self) -> (Self, Option<H>)

Trait Implementations

impl<T: Clone, Hash: Clone> Clone for MaybeHashed<T, Hash>

fn clone(&self) -> MaybeHashed<T, Hash>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T, Hash> Debug for MaybeHashed<T, Hash>

where T: Debug, Hash: Debug,

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

Formats the value using the given formatter.

impl<T, Hash> Decode for MaybeHashed<T, Hash>

where T: Decode, Hash: Decode,

fn decode<__CodecInputEdqy: Input>( __codec_input_edqy: &mut __CodecInputEdqy, ) -> Result<Self, Error>

Attempt to deserialise the value from input.

fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self>, ) -> Result<DecodeFinished, Error>

where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl<T, Hash> Encode for MaybeHashed<T, Hash>

where T: Encode, Hash: Encode,

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encode_to<__CodecOutputEdqy: Output + ?Sized>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy, )

Convert self to a slice and append it to the destination.

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

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> R

where F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl<T, H> From<T> for MaybeHashed<T, H>

fn from(t: T) -> Self

Converts to this type from the input type.

impl<T, Hash> MaxEncodedLen for MaybeHashed<T, Hash>

where T: MaxEncodedLen, Hash: MaxEncodedLen,

fn max_encoded_len() -> usize

Upper bound, in bytes, of the maximum encoded size of this item.

impl<T: PartialEq, Hash: PartialEq> PartialEq for MaybeHashed<T, Hash>

fn eq(&self, other: &MaybeHashed<T, Hash>) -> 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, Hash> TypeInfo for MaybeHashed<T, Hash>

where T: TypeInfo + 'static, Hash: TypeInfo + 'static,

type Identity = MaybeHashed<T, Hash>

The type identifying for which type info is provided.

fn type_info() -> Type

Returns the static type identifier for Self.

impl<T, Hash> EncodeLike for MaybeHashed<T, Hash>

where T: Encode, Hash: Encode,

impl<T: Eq, Hash: Eq> Eq for MaybeHashed<T, Hash>

impl<T, Hash> StructuralPartialEq for MaybeHashed<T, Hash>