[clang] [clang-tools-extra] [llvm] [clang] WIP: Improved Context Declaration tracking (PR #107942)

[Younan Zhang via cfe-commits]

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@@ -254,6 +254,33 @@ class CXXBaseSpecifier {
   TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; }
 };
 
+class ContextDeclOrSentinel {
+  uintptr_t Pointer;
+
+public:
+  ContextDeclOrSentinel(Decl *Pointer) : Pointer(uintptr_t(Pointer)) {}
+  explicit ContextDeclOrSentinel(unsigned TemplateDepth)
+      : Pointer(TemplateDepth << 1 | 1) {}
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zyn0217 wrote:

NVM, this is a different situation; the TemplateDepth might be large enough that a `PointerIntPair` couldn't hold.

https://github.com/llvm/llvm-project/pull/107942