Trait Lookup

pub trait Lookup {
    type Source;
    type Target;

    // Required method
    fn lookup(&self, s: Self::Source) -> Result<Self::Target, LookupError>;
}

Means of changing one type into another in a manner dependent on the source type.

Required Associated Types

type Source

Type to lookup from.

type Target

Type to lookup into.

Required Methods

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

Attempt a lookup.

Implementors

impl<T> Lookup for IdentityLookup<T>

type Source = T

type Target = T

impl<T: Config> Lookup for ChainContext<T>