Trait tp_runtime::traits::Lookup[−][src]

pub trait Lookup {
    type Source;
    type Target;
    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.

Associated Types

type Source[src]

Type to lookup from.

type Target[src]

Type to lookup into.

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Required methods

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

Attempt a lookup.

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Implementors

impl<T> Lookup for IdentityLookup<T>[src]

type Source = T

type Target = T

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