rustc_borrowck::region_infer

Struct RegionTracker

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pub struct RegionTracker {
    max_placeholder_universe_reached: UniverseIndex,
    min_reachable_universe: UniverseIndex,
    pub(crate) representative: RegionVid,
    representative_is_placeholder: bool,
    representative_is_existential: bool,
}
Expand description

An annotation for region graph SCCs that tracks the values of its elements.

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§max_placeholder_universe_reached: UniverseIndex

The largest universe of a placeholder reached from this SCC. This includes placeholders within this SCC.

§min_reachable_universe: UniverseIndex

The smallest universe index reachable form the nodes of this SCC.

§representative: RegionVid

The representative Region Variable Id for this SCC. We prefer placeholders over existentially quantified variables, otherwise it’s the one with the smallest Region Variable ID.

§representative_is_placeholder: bool

Is the current representative a placeholder?

§representative_is_existential: bool

Is the current representative existentially quantified?

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impl RegionTracker

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pub(crate) fn new(rvid: RegionVid, definition: &RegionDefinition<'_>) -> Self

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fn min_universe(self) -> UniverseIndex

The smallest-indexed universe reachable from and/or in this SCC.

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fn merge_min_max_seen(&mut self, other: &Self)

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pub(crate) fn has_incompatible_universes(&self) -> bool

Returns true if during the annotated SCC reaches a placeholder with a universe larger than the smallest reachable one, false otherwise.

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impl Annotation for RegionTracker

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fn merge_scc(self, other: Self) -> Self

Merge two existing annotations into one during path compression.o
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fn merge_reached(self, other: Self) -> Self

Merge a successor into this annotation.
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fn update_scc(&mut self, other: Self)

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fn update_reachable(&mut self, other: Self)

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impl Clone for RegionTracker

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fn clone(&self) -> RegionTracker

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for RegionTracker

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Copy for RegionTracker

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_query_param(self) -> P

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type Error = !

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const ALIGN: usize = _

The alignment of pointer.
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The resulting type after obtaining ownership.
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes