Struct frame_support::storage::types::ValueQuery

pub struct ValueQuery;

Expand description

Implements QueryKindTrait with Query type being Value.

Trait Implementations§

impl<Value, OnEmpty> QueryKindTrait<Value, OnEmpty> for ValueQuery
where Value: FullCodec + 'static, OnEmpty: Get<Value>,

const METADATA: StorageEntryModifierIR = StorageEntryModifierIR::Default

Metadata for the storage kind.

type Query = Value

Type returned on query

fn from_optional_value_to_query(v: Option<Value>) -> Self::Query

Convert an optional value (i.e. some if trie contains the value or none otherwise) to the query.

fn from_query_to_optional_value(v: Self::Query) -> Option<Value>

Convert a query to an optional value.

Auto Trait Implementations§

impl Freeze for ValueQuery

impl RefUnwindSafe for ValueQuery

impl Send for ValueQuery

impl Sync for ValueQuery

impl Unpin for ValueQuery

impl UnwindSafe for ValueQuery

Blanket Implementations§

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where T: 'static + ?Sized,

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