Enum sp_metadata_ir::StorageEntryModifierIR

pub enum StorageEntryModifierIR {
    Optional,
    Default,
}

A storage entry modifier indicates how a storage entry is returned when fetched and what the value will be if the key is not present. Specifically this refers to the “return type” when fetching a storage entry, and what the value will be if the key is not present.

Optional means you should expect an Option<T>, with None returned if the key is not present. Default means you should expect a T with the default value of default if the key is not present.

Variants

Optional

The storage entry returns an Option<T>, with None if the key is not present.

Default

The storage entry returns T::Default if the key is not present.

Trait Implementations

impl Clone for StorageEntryModifierIR

fn clone(&self) -> StorageEntryModifierIR

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StorageEntryModifierIR

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

Formats the value using the given formatter.

impl Encode for StorageEntryModifierIR

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

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

fn size_hint(&self) -> usize

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

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

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> Rwhere 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 From<StorageEntryModifierIR> for StorageEntryModifier

fn from(ir: StorageEntryModifierIR) -> Self

Converts to this type from the input type.

impl PartialEq<StorageEntryModifierIR> for StorageEntryModifierIR

fn eq(&self, other: &StorageEntryModifierIR) -> 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 EncodeLike<StorageEntryModifierIR> for StorageEntryModifierIR

impl Eq for StorageEntryModifierIR

impl StructuralEq for StorageEntryModifierIR

impl StructuralPartialEq for StorageEntryModifierIR