Trait AsLocalQueryKey 

pub trait AsLocalQueryKey: QueryKey {
    type LocalQueryKey;

    // Required method
    fn as_local_key(&self) -> Option<Self::LocalQueryKey>;
}

Required Associated Types

type LocalQueryKey

Required Methods

fn as_local_key(&self) -> Option<Self::LocalQueryKey>

Given an instance of this key, what crate is it referring to? This is used to find the provider.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl AsLocalQueryKey for (CrateNum, DefId)

type LocalQueryKey = DefId

fn as_local_key(&self) -> Option<Self::LocalQueryKey>

impl AsLocalQueryKey for (CrateNum, SimplifiedType)

type LocalQueryKey = SimplifiedType<DefId>

fn as_local_key(&self) -> Option<Self::LocalQueryKey>

impl AsLocalQueryKey for CrateNum

type LocalQueryKey = LocalCrate

fn as_local_key(&self) -> Option<Self::LocalQueryKey>

impl AsLocalQueryKey for DefId

type LocalQueryKey = LocalDefId

fn as_local_key(&self) -> Option<Self::LocalQueryKey>

Implementors