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SIL: Stub out type lowering of function types containing pack expansions

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This commit is contained in:
Slava Pestov
2022-12-05 14:09:32 -05:00
parent 5b9aef91f8
commit f9141e1aa1
3 changed files with 49 additions and 4 deletions
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35
lib/SIL/IR/AbstractionPattern.cpp
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@@ -1584,7 +1584,15 @@ public:
// If so, let's put a fresh generic parameter in the substituted signature
// here.
unsigned paramIndex = substGenericParams.size();
auto gp = GenericTypeParamType::get(false, 0, paramIndex, TC.Context);
bool isParameterPack = false;
if (substTy->isParameterPack() || substTy->is<PackArchetypeType>())
isParameterPack = true;
else if (pattern.isTypeParameterPack())
isParameterPack = true;
auto gp = GenericTypeParamType::get(isParameterPack, 0, paramIndex,
TC.Context);
substGenericParams.push_back(gp);
substReplacementTypes.push_back(substTy);
@@ -1881,11 +1889,30 @@ public:
}
CanType visitPackType(PackType *pack, AbstractionPattern pattern) {
llvm_unreachable("Unimplemented!");
if (auto gp = handleTypeParameterInAbstractionPattern(pattern, pack))
return gp;
// Break down the pack.
SmallVector<Type, 4> packElts;
for (unsigned i = 0; i < pack->getNumElements(); ++i) {
packElts.push_back(visit(pack->getElementType(i),
pattern.getPackElementType(i)));
}
return CanType(PackType::get(TC.Context, packElts));
}
CanType visitPackExpansionType(PackExpansionType *pack, AbstractionPattern pattern) {
llvm_unreachable("Unimplemented!");
CanType visitPackExpansionType(PackExpansionType *pack,
AbstractionPattern pattern) {
// Avoid walking into the pattern and count type if we can help it.
if (!pack->hasTypeParameter() && !pack->hasArchetype() &&
!pack->hasOpaqueArchetype()) {
return CanType(pack);
}
return CanType(PackExpansionType::get(
visit(pack->getPatternType(), pattern.getPackExpansionPatternType()),
visit(pack->getCountType(), pattern.getPackExpansionCountType())));
}
CanType visitExistentialType(ExistentialType *exist,