================
@@ -3767,6 +3767,57 @@ void
DependentDecltypeType::Profile(llvm::FoldingSetNodeID &ID,
E->Profile(ID, Context, true);
}
+PackIndexingType::PackIndexingType(const ASTContext &Context,
+ QualType Canonical, QualType Pattern,
+ Expr *IndexExpr,
+ ArrayRef<QualType> Expansions)
+ : Type(PackIndexing, Canonical,
+ computeDependence(Pattern, IndexExpr, Expansions)),
+ Context(Context), Pattern(Pattern), IndexExpr(IndexExpr),
+ Size(Expansions.size()) {
+
+ std::uninitialized_copy(Expansions.begin(), Expansions.end(),
+ getTrailingObjects<QualType>());
+}
+
+std::optional<unsigned> PackIndexingType::getSelectedIndex() const {
+ if (isInstantiationDependentType())
+ return std::nullopt;
+ // Should only be not a constant for error recovery.
+ ConstantExpr *CE = dyn_cast<ConstantExpr>(getIndexExpr());
+ if (!CE)
----------------
cor3ntin wrote:
```
int i = 0;
using foo = pack...[i];
```
We need to somehow parse that (if we fail to parse it it's going to at best not
be classified as a type),
but i is not a constant expression. So it's error recovery in the general
sense, not a RecoveryExpr
https://github.com/llvm/llvm-project/pull/72644
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