--- parser3/src/include/Attic/pa_vclass.h	2001/02/25 10:11:49	1.16
+++ parser3/src/include/Attic/pa_vclass.h	2001/03/07 13:54:46	1.21
@@ -1,92 +1,109 @@
 /*
-  $Id: pa_vclass.h,v 1.16 2001/02/25 10:11:49 paf Exp $
+  $Id: pa_vclass.h,v 1.21 2001/03/07 13:54:46 paf Exp $
 */
 
 #ifndef PA_VCLASS_H
 #define PA_VCLASS_H
 
-#include "pa_value.h"
+#include "pa_valiased.h"
 #include "pa_vhash.h"
 #include "pa_vstring.h"
 #include "pa_vjunction.h"
 
-class VClass : public Value {
+#define CLASS_NAME "CLASS"
+#define BASE_NAME "BASE"
+
+class VClass : public VAliased {
 public: // Value
 	
 	// all: for error reporting after fail(), etc
-	const char *type() const { return "Class"; }
+	const char *type() const { return "class"; }
 
 	// object_class: (field)=STATIC.value;(STATIC)=hash;(method)=method_ref with self=object_class
-	Value *get_element(const String& aname) {
-		// $NAME=name()
+	Value *get_element(String& aname) {
+		// $NAME=my name
 		if(aname==NAME_NAME)
-			return NEW VString(name());
-		// $PARENTS=parents table
-		if(aname==PARENTS_NAME)
-			return 0;// TODO: table of parents
-		// $STATIC=STATIC hash
-		if(aname==STATICS_NAME)
-			return &STATICS;
-
-		// $method=junction(this+method)
-		if(Method *method=static_cast<Method *>(methods().get(aname))) {
-			Junction& j=*NEW Junction(pool(), 
-				*this,
-				method,0,0,0,0);
-
-			return NEW VJunction(j);
-		}
-
-		// $field=STATIC.field
-		return STATICS.get_element(aname);
+			return NEW VString(class_alias->name());
+		// $CLASS=my class=myself
+		if(aname==CLASS_NAME)
+			return class_alias;
+		// $BASE=my parent
+		if(aname==BASE_NAME)
+			return class_alias->base();
+		// $method=junction(self+class+method)
+		if(Junction *junction=get_junction(*this, aname))
+			return NEW VJunction(*junction);
+		// $field=static field
+		return get_field(aname);
 	}
 
 	// object_class, operator_class: (field)=value - static values only
 	void put_element(const String& name, Value *value) {
-		STATICS.put_element(name, value);
+		set_field(name, value);
 	}
 
 	// object_class, object_instance: object_class
-	VClass *get_class() { return this; /*TODO: think when?*/ }
+	VClass *get_class() { return this; }
 
 public: // usage
 
-	VClass(Pool& apool) : 
-		Value(apool), 
-		STATICS(apool),
+	VClass(Pool& apool) : VAliased(apool, *this), 
+		fields(apool),
 		fmethods(apool),
-		parents(apool),
-		parents_hash(apool) {
+		fbase(0) {
 	}
 
 	void add_method(const String& name, Method& method) {
 		fmethods.put(name, &method);
 	}
-	Hash& methods() { return fmethods; }
+//	Hash& methods() { return fmethods; }
 	
-	void add_parent(VClass& parent) {
-		parents+=&parent;
-		parents_hash.put(*parent.name(), &parent);
-		// TODO: monkey immediate_parent
-			// fill parents & parents_hash
-	}
-/*
-	// true when me_or_ancestor is me or my ancestor
-	bool is_or_derived_from(VClass& me_or_ancestor) {
-		if(this==&me_or_ancestor)
-			return true; // it's me
-
-		return parents_hash.get(*me_or_ancestor.name())!=0;
+	void set_base(VClass& abase) {
+		// remember the guy
+		fbase=&abase;
+	}
+	VClass *base() { return fbase; }
+
+	bool is_or_derived_from(VClass& vclass) {
+		return 
+			this==&vclass || 
+			fbase && fbase->is_or_derived_from(vclass);
+	}
+
+	Junction *get_junction(VAliased& self, const String& name) {
+		if(Method *method=static_cast<Method *>(fmethods.get(name)))
+			return NEW Junction(pool(), self, this, method, 0,0,0,0);
+		if(fbase)
+			return fbase->get_junction(self, name);
+		return 0; 
 	}
-*/
-public: //usage
 
-	VHash STATICS;
+private:
 
+	Value *get_field(const String& name) {
+		Value *result=static_cast<Value *>(fields.get(name));
+		if(!result && fbase)
+			result=fbase->get_field(name);
+		return result;
+	}
+		
+	void set_field(const String& name, Value *value) {
+		if(fbase && fbase->replace_field(name, value))
+			return;
+
+		fields.put(name, value);
+	}
+	bool replace_field(const String& name, Value *value) {
+		return 
+			(fbase && fbase->replace_field(name, value)) ||
+			fields.put_replace(name, value);
+	}
+	
 private:
 
+	VClass *fbase;
+	Hash fields;
 	Hash fmethods;
-	Array parents;  Hash parents_hash;
 };
 
 #endif