================
@@ -1642,6 +1661,50 @@ void
Sema::CheckCompleteDecompositionDeclaration(DecompositionDecl *DD) {
DD->setInvalidDecl();
}
+std::optional<unsigned> Sema::GetDecompositionElementCount(QualType T,
+ SourceLocation Loc)
{
+ const ASTContext &Ctx = getASTContext();
+ assert(!T->isDependentType());
+ if (auto *CAT = Ctx.getAsConstantArrayType(T))
+ return CAT->getSize().getZExtValue();
+ if (auto *VT = T->getAs<VectorType>())
+ return VT->getNumElements();
+ if (T->getAs<ComplexType>())
+ return 2;
+
+ llvm::APSInt TupleSize(Ctx.getTypeSize(Ctx.getSizeType()));
+ switch (isTupleLike(*this, Loc, T, TupleSize)) {
+ case IsTupleLike::Error:
+ return {};
+ case IsTupleLike::TupleLike:
+ return TupleSize.getExtValue();
+ case IsTupleLike::NotTupleLike:
+ break;
+ }
+ CXXRecordDecl *OrigRD = T->getAsCXXRecordDecl();
+ if (!OrigRD || OrigRD->isUnion()) {
----------------
erichkeane wrote:
single-line curleys.
https://github.com/llvm/llvm-project/pull/131515
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