diff --git a/tmpl/parser.cc b/tmpl/parser.cc
index 2b7625a..38b81bb 100644
--- a/tmpl/parser.cc
+++ b/tmpl/parser.cc
@@ -136,6 +136,35 @@ refptr<Node> Node::operator[](const std::string & index)
         : NULL;
 }
 
+void Token::process()
+{
+}
+
+MatchSet::MatchSet(const char * data, int * ovector, int ovec_size)
+    : m_data(data), m_ovector(ovector), m_ovec_size(ovec_size)
+{
+}
+
+std::string MatchSet::operator[](int index)
+{
+    if (0 <= index && index < (m_ovec_size / 3))
+    {
+        int idx = 2 * index;
+        if (m_ovector[idx] >= 0 && m_ovector[idx + 1] >= 0)
+        {
+            return string(m_data, m_ovector[idx],
+                    m_ovector[idx + 1] - m_ovector[idx]);
+        }
+    }
+    return "";
+}
+
+std::string MatchSet::operator[](const std::string & index)
+{
+    /* FIXME */
+    return "";
+}
+
 #ifdef I_NAMESPACE
 };
 #endif
diff --git a/tmpl/parser.h b/tmpl/parser.h
index 6aa8cac..6118daf 100644
--- a/tmpl/parser.h
+++ b/tmpl/parser.h
@@ -121,6 +121,20 @@ class I_CLASSNAME
         const char * m_errstr;
 };
 
+class MatchSet
+{
+    public:
+        MatchSet(const char * data, int * ovector, int ovec_size);
+        std::string operator[](int index);
+        std::string operator[](const std::string & index);
+
+    protected:
+        const char * m_data;
+        int * m_ovector;
+        int m_ovec_size;
+};
+typedef refptr<MatchSet> MatchSetRef;
+
 class Node
 {
     public:
@@ -131,14 +145,16 @@ class Node
         std::map< std::string, refptr<Node> > m_named_children;
         std::vector< refptr<Node> > m_indexed_children;
 };
-
 typedef refptr<Node> NodeRef;
 
 class Token : public Node
 {
     public:
+        virtual void process();
+
     protected:
 };
+typedef refptr<Token> TokenRef;
 
 #ifdef I_NAMESPACE
 };