[lldb][NFC] Implement RTTI for DWARFASTParserSwift

Author: augusto2112

lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParser.h

@@ -26,7 +26,7 @@ class SymbolFileDWARF;
 
 class DWARFASTParser {
 public:
-  enum class Kind { DWARFASTParserClang };
+  enum class Kind { DWARFASTParserClang, DWARFASTParserSwift};
   DWARFASTParser(Kind kind) : m_kind(kind) {}
 
   virtual ~DWARFASTParser() = default;

lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserSwift.cpp

@@ -40,7 +40,8 @@ using namespace lldb_private::dwarf;
 
 DWARFASTParserSwift::DWARFASTParserSwift(
     TypeSystemSwiftTypeRef &swift_typesystem)
-    : m_swift_typesystem(swift_typesystem) {}
+    : DWARFASTParser(Kind::DWARFASTParserSwift),
+      m_swift_typesystem(swift_typesystem) {}
 
 DWARFASTParserSwift::~DWARFASTParserSwift() {}
 

lldb/source/Plugins/SymbolFile/DWARF/DWARFASTParserSwift.h

@@ -67,6 +67,10 @@ class DWARFASTParserSwift : public DWARFASTParser {
     return lldb_private::ConstString();
   }
 
+  static bool classof(const DWARFASTParser *Parser) {
+    return Parser->GetKind() == Kind::DWARFASTParserSwift;
+  }
+
 protected:
   lldb_private::TypeSystemSwiftTypeRef &m_swift_typesystem;
 };