diff --git a/src/parser/parser.cc b/src/parser/parser.cc
index de0bc86..5415d61 100644
--- a/src/parser/parser.cc
+++ b/src/parser/parser.cc
@@ -7,6 +7,7 @@
 #include <stdbool.h>
 
 std::unordered_set<std::string> type_names;
+std::unordered_set<std::string> class_names;
 
 extern FILE * yyin;
 
@@ -260,3 +261,13 @@ void set_translation_unit_node(Node * _translation_unit_node)
 {
     translation_unit_node = _translation_unit_node;
 }
+
+void observe_class_name(const std::string & name)
+{
+    class_names.insert(name);
+}
+
+bool is_class_name(const std::string & name)
+{
+    return class_names.count(name) != 0u;
+}
diff --git a/src/parser/parser.h b/src/parser/parser.h
index a6ded94..07eb21c 100644
--- a/src/parser/parser.h
+++ b/src/parser/parser.h
@@ -15,5 +15,7 @@ void handle_parse_error(const char * str, const YYLTYPE * yylloc);
 void observe_type_name(const Node * node);
 bool is_type_name(const std::string & type_name);
 void set_translation_unit_node(Node * _translation_unit_node);
+void observe_class_name(const std::string & name);
+bool is_class_name(const std::string & name);
 
 #endif
diff --git a/src/parser/parser.yc b/src/parser/parser.yc
index 85b5e6a..431df85 100644
--- a/src/parser/parser.yc
+++ b/src/parser/parser.yc
@@ -749,9 +749,11 @@ enumerator
 class_specifier
     : CLASS IDENTIFIER LCURLY RCURLY {
         $$ = new Node(NODE_TYPE_LIST);
+        observe_class_name(*$2->token.text);
     }
     | CLASS IDENTIFIER LCURLY external_declaration_list RCURLY {
         $$ = new Node(NODE_TYPE_LIST);
+        observe_class_name(*$2->token.text);
     }
     ;