Trait rustc_data_structures::unify::UnificationStore

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

Required Methods

fn new() -> Self

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

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

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

fn len(&self) -> usize

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

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

Provided Methods

fn tag() -> &'static str

Implementors

• impl<K> UnificationStore for InPlace<K> where
    K: UnifyKey,  type Key = K; type Value = <K as UnifyKey>::Value; type Snapshot = Snapshot;