[−][src]Trait sp_runtime::traits::StaticLookup

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

    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

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

Attempt a lookup.

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>[src]

type Source = T

type Target = T

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