[clang] [Clang] Implement P3034R1 Module Declarations Shouldn’t be Macros (PR #90574)

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@@ -520,6 +524,18 @@ class alignas(IdentifierInfoAlignment) IdentifierInfo {
       RecomputeNeedsHandleIdentifier();
   }
 
+  /// Determine whether this is the contextual keyword \c module.
+  bool isModulesDecl() const { return IsModulesDecl; }
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yronglin wrote:

Agree!

https://github.com/llvm/llvm-project/pull/90574