================
@@ -268,17 +268,34 @@ class alignas(8) Decl {
/// }
/// void A::f(); // SemanticDC == namespace 'A'
/// // LexicalDC == global namespace
- llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;
+ llvm::PointerIntPair<
----------------
ChuanqiXu9 wrote:
+1 for more comments. I spent more time to understand the structure here. Also
maybe we can make the code self explained by:
```suggestion
using DeclCtxTy = llvm::PointerUnion<DeclContext*, MultipleDC*>;
using DeclCtxAndHasAttrTy = llvm::PointerIntPair<llvm::PointerUnion<DeclContext
*, MultipleDC *>, 1,
bool>;
using DeclCtxAndHasAttrTyOrInvalidDeclTy = ...
```
https://github.com/llvm/llvm-project/pull/87361
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