Trait sp_runtime::traits::StaticLookup

pub trait StaticLookup {
    type Source: Codec + Clone + PartialEq + Debug;
    type Target;
    pub fn lookup(s: Self::Source) -> Result<Self::Target, LookupError>;
    pub fn unlookup(t: Self::Target) -> Self::Source;
}

Means of changing one type into another in a manner dependent on the source type. This variant is different to Lookup in that it doesn't (can cannot) require any context.

Associated Types

type Source: Codec + Clone + PartialEq + Debug

Type to lookup from.

type Target

Type to lookup into.

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Required methods

pub fn lookup(s: Self::Source) -> Result<Self::Target, LookupError>

Attempt a lookup.

pub fn unlookup(t: Self::Target) -> Self::Source

Convert from Target back to Source.

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Implementors

impl<T: Codec + Clone + PartialEq + Debug> StaticLookup for IdentityLookup<T>

type Source = T

type Target = T

pub fn lookup(x: T) -> Result<T, LookupError>

pub fn unlookup(x: T) -> T

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