pub(crate) struct OutlivesConstraintSet<'tcx> {
    outlives: IndexVec<OutlivesConstraintIndex, OutlivesConstraint<'tcx>>,
}
Expand description

A set of NLL region constraints. These include “outlives” constraints of the form R1: R2. Each constraint is identified by a unique OutlivesConstraintIndex and you can index into the set (constraint_set[i]) to access the constraint details.

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§outlives: IndexVec<OutlivesConstraintIndex, OutlivesConstraint<'tcx>>

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impl<'tcx> OutlivesConstraintSet<'tcx>

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pub(crate) fn push(&mut self, constraint: OutlivesConstraint<'tcx>)

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pub(crate) fn graph(&self, num_region_vars: usize) -> ConstraintGraph<Normal>

Constructs a “normal” graph from the constraint set; the graph makes it easy to find the constraints affecting a particular region.

N.B., this graph contains a “frozen” view of the current constraints. Any new constraints added to the OutlivesConstraintSet after the graph is built will not be present in the graph.

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pub(crate) fn reverse_graph( &self, num_region_vars: usize ) -> ConstraintGraph<Reverse>

Like graph, but constraints a reverse graph where R1: R2 represents an edge R2 -> R1.

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pub(crate) fn compute_sccs( &self, constraint_graph: &ConstraintGraph<Normal>, static_region: RegionVid ) -> Sccs<RegionVid, ConstraintSccIndex>

Computes cycles (SCCs) in the graph of regions. In particular, find all regions R1, R2 such that R1: R2 and R2: R1 and group them into an SCC, and find the relationships between SCCs.

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pub(crate) fn outlives( &self ) -> &IndexSlice<OutlivesConstraintIndex, OutlivesConstraint<'tcx>>

Trait Implementations§

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impl<'tcx> Clone for OutlivesConstraintSet<'tcx>

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fn clone(&self) -> OutlivesConstraintSet<'tcx>

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<'tcx> Debug for OutlivesConstraintSet<'tcx>

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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<'tcx> Default for OutlivesConstraintSet<'tcx>

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fn default() -> OutlivesConstraintSet<'tcx>

Returns the “default value” for a type. Read more
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impl<'tcx> Index<OutlivesConstraintIndex> for OutlivesConstraintSet<'tcx>

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type Output = OutlivesConstraint<'tcx>

The returned type after indexing.
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fn index(&self, i: OutlivesConstraintIndex) -> &Self::Output

Performs the indexing (container[index]) operation. Read more

Auto Trait Implementations§

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impl<'tcx> !RefUnwindSafe for OutlivesConstraintSet<'tcx>

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impl<'tcx> !Send for OutlivesConstraintSet<'tcx>

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impl<'tcx> !Sync for OutlivesConstraintSet<'tcx>

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impl<'tcx> Unpin for OutlivesConstraintSet<'tcx>

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impl<'tcx> !UnwindSafe for OutlivesConstraintSet<'tcx>

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

Layout§

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: 24 bytes