[clang] [clang] Reject 'auto' storage class with type specifier in C++ (PR #166004)

[Aaron Ballman via cfe-commits]

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@@ -415,6 +415,12 @@ class DeclSpec {
   SourceLocation FriendLoc, ModulePrivateLoc, ConstexprLoc;
   SourceLocation TQ_pipeLoc;
 
+  // Track conflicting type specifier when 'auto' is set (for Finish()
+  // detection)
+  LLVM_PREFERRED_TYPE(TST)
+  unsigned ConflictingTypeSpecifier : 7;
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AaronBallman wrote:

This should be moved up so it's grouped with the other bit-fields, otherwise it won't pack together. I'd put it up with the other type-specifier fields.

https://github.com/llvm/llvm-project/pull/166004