[clang] fix issue 73559. (PR #74926)

[Mariya Podchishchaeva via cfe-commits]

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@@ -2702,7 +2702,7 @@ Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS,
   bool MalformedTypeSpec = false;
   if (!TemplateInfo.Kind &&
       Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw___super)) {
-    if (TryAnnotateCXXScopeToken())
+    if (getLangOpts().CPlusPlus && TryAnnotateCXXScopeToken())
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Fznamznon wrote:

The caller is named `ParseCXXClassMemberDeclaration` so, I'm not sure it can and should be called outside of C++. Perhaps we should assert instead of checking that is its C++.

https://github.com/llvm/llvm-project/pull/74926