Fix ScopeReflectionTest issue

Author: mcbarton

unittests/CppInterOp/ScopeReflectionTest.cpp

@@ -772,7 +772,11 @@ template<class T> constexpr T pi = T(3.1415926535897932385L);
   VarTemplateDecl* VDTD1 = VD->getSpecializedTemplate();
   EXPECT_TRUE(VDTD1->isThisDeclarationADefinition());
 #if CLANG_VERSION_MAJOR > 13
+#if CLANG_VERSION_MAJOR > 18
+  TemplateArgument TA1 = (*VD->getTemplateArgsAsWritten())[0].getArgument();
+#else
   TemplateArgument TA1 = (*VD->getTemplateArgsInfo())[0].getArgument();
+#endif // CLANG_VERSION_MAJOR
 #else
   TemplateArgument TA1 = VD->getTemplateArgsInfo()[0].getArgument();
 #endif // CLANG_VERSION_MAJOR