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[ConstraintSystem] Create opened pack element generic environments lazily

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in the constraint system.
This commit is contained in:
Holly Borla
2023-01-06 18:55:11 -08:00
parent 319ae65636
commit 6e28f996ce
10 changed files with 63 additions and 69 deletions
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21
lib/Sema/ConstraintSystem.cpp
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@@ -637,6 +637,26 @@ std::pair<Type, OpenedArchetypeType *> ConstraintSystem::openExistentialType(
return {result, opened};
}
void ConstraintSystem::addPackElementEnvironment(PackExpansionExpr *expr) {
auto *locator = getConstraintLocator(expr);
PackExpansionEnvironments[locator] = UUID::fromTime();
}
GenericEnvironment *
ConstraintSystem::getPackElementEnvironment(ConstraintLocator *locator) {
auto result = PackExpansionEnvironments.find(locator);
if (result == PackExpansionEnvironments.end())
return nullptr;
auto uuid = result->second;
auto &ctx = getASTContext();
auto elementSig = ctx.getOpenedElementSignature(
DC->getGenericSignatureOfContext().getCanonicalSignature());
auto *contextEnv = DC->getGenericEnvironmentOfContext();
auto contextSubs = contextEnv->getForwardingSubstitutionMap();
return GenericEnvironment::forOpenedElement(elementSig, uuid, contextSubs);
}
/// Extend the given depth map by adding depths for all of the subexpressions
/// of the given expression.
static void extendDepthMap(
@@ -5378,7 +5398,6 @@ void constraints::simplifyLocator(ASTNode &anchor,
break;
case ConstraintLocator::PackElement:
case ConstraintLocator::OpenedPackElement:
case ConstraintLocator::PackShape:
break;