Struct rustc_data_structures::snapshot_map::SnapshotMap

pub struct SnapshotMap<K, V> where
    K: Hash + Clone + Eq,  {
    map: FxHashMap<K, V>,
    undo_log: Vec<UndoLog<K, V>>,
}

🔬 This is a nightly-only experimental API. (rustc_private)

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Fields

map: FxHashMap<K, V>

🔬 This is a nightly-only experimental API. (rustc_private)

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undo_log: Vec<UndoLog<K, V>>

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Methods

impl<K, V> SnapshotMap<K, V> where     K: Hash + Clone + Eq,

pub fn new() -> Self

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pub fn clear(&mut self)

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pub fn insert(&mut self, key: K, value: V) -> bool

🔬 This is a nightly-only experimental API. (rustc_private)

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pub fn remove(&mut self, key: K) -> bool

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pub fn get(&self, key: &K) -> Option<&V>

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pub fn snapshot(&mut self) -> Snapshot

🔬 This is a nightly-only experimental API. (rustc_private)

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fn assert_open_snapshot(&self, snapshot: &Snapshot)

🔬 This is a nightly-only experimental API. (rustc_private)

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

🔬 This is a nightly-only experimental API. (rustc_private)

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pub fn partial_rollback<F>(     &mut self,     snapshot: &Snapshot,     should_revert_key: &F ) where     F: Fn(&K) -> bool,

🔬 This is a nightly-only experimental API. (rustc_private)

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

🔬 This is a nightly-only experimental API. (rustc_private)

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fn reverse(&mut self, entry: UndoLog<K, V>)

🔬 This is a nightly-only experimental API. (rustc_private)

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Trait Implementations

impl<'k, K, V> Index<&'k K> for SnapshotMap<K, V> where     K: Hash + Clone + Eq,

type Output = V

The returned type after indexing.

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn index(&self, key: &'k K) -> &V

Performs the indexing (container[index]) operation.