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 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 From<StorageEntryModifierIR> for StorageEntryModifier

fn from(ir: StorageEntryModifierIR) -> Self

Converts to this type from the input type.

impl PartialEq 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 for StorageEntryModifierIR

impl Eq for StorageEntryModifierIR

impl StructuralEq for StorageEntryModifierIR

impl StructuralPartialEq for StorageEntryModifierIR