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[ConstraintSystem] NFC: Associate transitive binding inference with PotentialBindings

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This commit is contained in:
Pavel Yaskevich
2020-07-01 14:31:51 -07:00
parent fa553ab83d
commit 8df19d2c87
2 changed files with 36 additions and 34 deletions
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33
lib/Sema/ConstraintSystem.h
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@@ -4557,6 +4557,23 @@ private:
/// if it has only concrete types or would resolve a closure.
bool favoredOverDisjunction(Constraint *disjunction) const;
/// Detect `subtype` relationship between two type variables and
/// attempt to infer supertype bindings transitively e.g.
///
/// Given A <: T1 <: T2 transitively A <: T2
///
/// Which gives us a new (superclass A) binding for T2 as well as T1.
///
/// \param cs The constraint system this type variable is associated with.
///
/// \param inferredBindings The set of all bindings inferred for type
/// variables in the workset.
void inferTransitiveBindings(
ConstraintSystem &cs,
const llvm::SmallDenseMap<TypeVariableType *,
ConstraintSystem::PotentialBindings>
&inferredBindings);
void dump(llvm::raw_ostream &out,
unsigned indent = 0) const LLVM_ATTRIBUTE_USED {
out.indent(indent);
@@ -4625,22 +4642,6 @@ private:
bool &addOptionalSupertypeBindings) const;
PotentialBindings getPotentialBindings(TypeVariableType *typeVar) const;
/// Detect `subtype` relationship between two type variables and
/// attempt to infer supertype bindings transitively e.g.
///
/// Given A <: T1 <: T2 transitively A <: T2
///
/// Which gives us a new (superclass A) binding for T2 as well as T1.
///
/// \param inferredBindings The set of all bindings inferred for type
/// variables in the workset.
/// \param bindings The type variable we aim to infer new supertype
/// bindings for.
void inferTransitiveSupertypeBindings(
const llvm::SmallDenseMap<TypeVariableType *, PotentialBindings>
&inferredBindings,
PotentialBindings &bindings);
private:
/// Add a constraint to the constraint system.
SolutionKind addConstraintImpl(ConstraintKind kind, Type first, Type second,