Replace Action with Action* so can be polymorphic

parserstate.hpp

@@ -18,8 +18,8 @@ namespace Parser {
   public:
     void setfamily( StateFamily *s_family ) { family = s_family; }
     Transition input( wchar_t ch );
-    virtual Action enter( void ) { return Ignore(); };
-    virtual Action exit( void ) { return Ignore(); };
+    virtual Action *enter( void ) { return NULL; }
+    virtual Action *exit( void ) { return NULL; }
 
     State() : family( NULL ) {};
     virtual ~State() {};
@@ -33,7 +33,7 @@ namespace Parser {
   };
 
   class Escape : public State {
-    Action enter( void );
+    Action *enter( void );
     Transition input_state_rule( wchar_t ch );
   };
 
@@ -42,7 +42,7 @@ namespace Parser {
   };
 
   class CSI_Entry : public State {
-    Action enter( void );
+    Action *enter( void );
     Transition input_state_rule( wchar_t ch );
   };
   class CSI_Param : public State {
@@ -56,7 +56,7 @@ namespace Parser {
   };
   
   class DCS_Entry : public State {
-    Action enter( void );
+    Action *enter( void );
     Transition input_state_rule( wchar_t ch );
   };
   class DCS_Param : public State {
@@ -66,18 +66,18 @@ namespace Parser {
     Transition input_state_rule( wchar_t ch );
   };
   class DCS_Passthrough : public State {
-    Action enter( void );
+    Action *enter( void );
     Transition input_state_rule( wchar_t ch );
-    Action exit( void );
+    Action *exit( void );
   };
   class DCS_Ignore : public State {
     Transition input_state_rule( wchar_t ch );
   };
 
   class OSC_String : public State {
-    Action enter( void );
+    Action *enter( void );
     Transition input_state_rule( wchar_t ch );
-    Action exit( void );
+    Action *exit( void );
   };
   class SOS_PM_APC_String : public State {
     Transition input_state_rule( wchar_t ch );