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

[via cfe-commits]

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@@ -860,9 +861,15 @@ bool Preprocessor::HandleIdentifier(Token &Identifier) {
     ModuleImportLoc = Identifier.getLocation();
     NamedModuleImportPath.clear();
     IsAtImport = true;
-    ModuleImportExpectsIdentifier = true;
     CurLexerCallback = CLK_LexAfterModuleImport;
   }
+
+  if ((II.isModulesDeclaration() || Identifier.is(tok::kw_module)) &&
+      !InMacroArgs && !DisableMacroExpansion &&
+      (getLangOpts().CPlusPlusModules || getLangOpts().DebuggerSupport) &&
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cor3ntin wrote:

Remind me why we should parse modules in "DebuggerSupport" mode?

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