rustc_query_system::query

Trait QueryCache

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pub trait QueryCache: Sized {
    type Key: Hash + Eq + Copy + Debug;
    type Value: Copy;

    // Required methods
    fn lookup(&self, key: &Self::Key) -> Option<(Self::Value, DepNodeIndex)>;
    fn complete(&self, key: Self::Key, value: Self::Value, index: DepNodeIndex);
    fn iter(&self, f: &mut dyn FnMut(&Self::Key, &Self::Value, DepNodeIndex));
}

Required Associated Types§

Required Methods§

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fn lookup(&self, key: &Self::Key) -> Option<(Self::Value, DepNodeIndex)>

Checks if the query is already computed and in the cache.

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fn complete(&self, key: Self::Key, value: Self::Value, index: DepNodeIndex)

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fn iter(&self, f: &mut dyn FnMut(&Self::Key, &Self::Value, DepNodeIndex))

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.

Implementors§

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impl<K, V> QueryCache for DefaultCache<K, V>
where K: Eq + Hash + Copy + Debug, V: Copy,

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type Key = K

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type Value = V

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impl<K, V> QueryCache for VecCache<K, V>
where K: Eq + Idx + Copy + Debug, V: Copy,

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type Key = K

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type Value = V

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impl<V> QueryCache for DefIdCache<V>
where V: Copy,

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impl<V> QueryCache for SingleCache<V>
where V: Copy,