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Merge pull request #40282 from hborla/existential-any

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[SE-0335] Introduce existential `any`
This commit is contained in:
Holly Borla
2021-12-10 08:56:03 -08:00
committed by GitHub
parent 5a6341bd65 f96104d2d5
commit 69be7b17fc
51 changed files with 1035 additions and 24 deletions
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15
lib/Sema/CSSimplify.cpp
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@@ -2920,7 +2920,13 @@ ConstraintSystem::matchExistentialTypes(Type type1, Type type2,
// Handle existential metatypes.
if (auto meta1 = type1->getAs<MetatypeType>()) {
if (auto meta2 = type2->getAs<ExistentialMetatypeType>()) {
ExistentialMetatypeType *meta2;
if (auto existential = type2->getAs<ExistentialType>()) {
meta2 = existential->getConstraintType()->getAs<ExistentialMetatypeType>();
} else {
meta2 = type2->getAs<ExistentialMetatypeType>();
}
if (meta2) {
return matchExistentialTypes(meta1->getInstanceType(),
meta2->getInstanceType(), kind, subflags,
locator.withPathElement(
@@ -5674,6 +5680,7 @@ ConstraintSystem::matchTypes(Type type1, Type type2, ConstraintKind kind,
case TypeKind::GenericFunction:
llvm_unreachable("Polymorphic function type should have been opened");
case TypeKind::Existential:
case TypeKind::ProtocolComposition:
switch (kind) {
case ConstraintKind::Equal:
@@ -6318,6 +6325,7 @@ ConstraintSystem::simplifyConstructionConstraint(
case TypeKind::DynamicSelf:
case TypeKind::ProtocolComposition:
case TypeKind::Protocol:
case TypeKind::Existential:
// Break out to handle the actual construction below.
break;
@@ -10694,6 +10702,11 @@ getDynamicCallableMethods(Type type, ConstraintSystem &CS,
if (auto protocolComp = dyn_cast<ProtocolCompositionType>(canType))
return calculateForComponentTypes(protocolComp->getMembers());
if (auto existential = dyn_cast<ExistentialType>(canType)) {
auto constraint = existential->getConstraintType();
return getDynamicCallableMethods(constraint, CS, locator);
}
// Otherwise, this must be a nominal type.
// Dynamic calling doesn't work for tuples, etc.
auto nominal = canType->getAnyNominal();