[−][src]Trait rustc_data_structures::unify::UnificationStore

pub trait UnificationStore: Index<usize, Output = VarValue<Self::Key>> + Clone + Default where
    <Self::Key as UnifyKey>::Value == Self::Value, {
    type Key: UnifyKey;
    type Value: UnifyValue;
    type Snapshot;
    fn start_snapshot(&mut self) -> Self::Snapshot;

    fn rollback_to(&mut self, snapshot: Self::Snapshot);

    fn commit(&mut self, snapshot: Self::Snapshot);

    fn values_since_snapshot(&self, snapshot: &Self::Snapshot) -> Range<usize>;

    fn reset_unifications<impl FnMut(u32) -> VarValue>(
        &mut self, 
        value: impl FnMut(u32) -> VarValue
    )
    where
        impl FnMut(u32) -> VarValue: FnMut(u32) -> VarValue<Self::Key>;

    fn len(&self) -> usize;

    fn push(&mut self, value: VarValue<Self::Key>);

    fn reserve(&mut self, num_new_values: usize);

    fn update<F>(&mut self, index: usize, op: F)
    where
        F: FnOnce(&mut VarValue<Self::Key>);

    fn tag() -> &'static str { ... }
}

Largely internal trait implemented by the unification table backing store types. The most common such type is InPlace, which indicates a standard, mutable unification table.

Associated Types

type Key: UnifyKey

type Value: UnifyValue

type Snapshot

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Required methods

fn start_snapshot(&mut self) -> Self::Snapshot

fn rollback_to(&mut self, snapshot: Self::Snapshot)

fn commit(&mut self, snapshot: Self::Snapshot)

ⓘImportant traits for Range<A>
fn values_since_snapshot(&self, snapshot: &Self::Snapshot) -> Range<usize>

fn reset_unifications<impl FnMut(u32) -> VarValue>(
    &mut self,
    value: impl FnMut(u32) -> VarValue
) where
    impl FnMut(u32) -> VarValue: FnMut(u32) -> VarValue<Self::Key>, 

fn len(&self) -> usize

fn push(&mut self, value: VarValue<Self::Key>)

fn reserve(&mut self, num_new_values: usize)

fn update<F>(&mut self, index: usize, op: F) where
    F: FnOnce(&mut VarValue<Self::Key>), 

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Provided methods

fn tag() -> &'static str

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Implementors

impl<K> UnificationStore for InPlace<K> where
    K: UnifyKey, [src]

type Key = K

type Value = <K as UnifyKey>::Value

type Snapshot = Snapshot

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