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Merge pull request #65861 from xedin/rdar-109160060

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[CSSimplify] Allow conversions between tuples with pack expansions and `Any`
This commit is contained in:
Pavel Yaskevich
2023-05-15 16:20:50 -07:00
committed by GitHub
parent 406b7a62c7 181d2d1371
commit 96cbc01822
2 changed files with 25 additions and 1 deletions
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6
lib/Sema/CSSimplify.cpp
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@@ -6831,9 +6831,13 @@ ConstraintSystem::matchTypes(Type type1, Type type2, ConstraintKind kind,
// becuase expansion could be defaulted to an empty pack which means
// that under substitution that element would disappear and the type
// would be just `(Int)`.
//
// Notable exception here is `Any` which doesn't require wrapping and
// would be handled by existental promotion in cases where it's allowed.
if (isTupleWithUnresolvedPackExpansion(origType1) ||
isTupleWithUnresolvedPackExpansion(origType2)) {
if (desugar1->is<TupleType>() != desugar2->is<TupleType>()) {
if (desugar1->is<TupleType>() != desugar2->is<TupleType>() &&
(!desugar1->isAny() && !desugar2->isAny())) {
return matchTypes(
desugar1->is<TupleType>() ? type1
: TupleType::get({type1}, getASTContext()),