X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=mcs%2Fmbas%2Finterface.cs;h=61204498e3a5be8684c68e6e3f007d990ec6aa7a;hb=ffbfd01518734e113823e048e1f8b8e753c2337c;hp=ed04dea14be0f36126d3b4c34abba9e6cccad0c7;hpb=a8ef2806b43ec0b5e237014c33dcdcfe9742b9d6;p=mono.git

diff --git a/mcs/mbas/interface.cs b/mcs/mbas/interface.cs
index ed04dea14be..61204498e3a 100644
--- a/mcs/mbas/interface.cs
+++ b/mcs/mbas/interface.cs
@@ -1,859 +1,181 @@
-//
-// interface.cs: Interface handler
-//
-// Author: Miguel de Icaza (miguel@gnu.org)
-//
-// Licensed under the terms of the GNU GPL
-//
-// (C) 2001 Ximian, Inc (http://www.ximian.com)
-//
-
-using System.Collections;
-using System;
-using System.IO;
-using System.Reflection;
-using System.Reflection.Emit;
-
-namespace Mono.CSharp {
-
-	/// <summary>
-	///   Interfaces
-	/// </summary>
-	public class Interface : DeclSpace {
-		const MethodAttributes interface_method_attributes =
-			MethodAttributes.Public |
-			MethodAttributes.Abstract |
-			MethodAttributes.HideBySig |
-			MethodAttributes.NewSlot |
-			MethodAttributes.Virtual;
-
-		const MethodAttributes property_attributes =
-			MethodAttributes.Public |
-			MethodAttributes.Abstract |
-			MethodAttributes.HideBySig |
-			MethodAttributes.NewSlot |
-			MethodAttributes.SpecialName |
-			MethodAttributes.Virtual;
-		
-		ArrayList bases;
-		
-		ArrayList defined_method;
-		ArrayList defined_indexer;
-		ArrayList defined_events;
-		ArrayList defined_properties;
-
-		ArrayList method_builders;
-		ArrayList property_builders;
-		
-		Attributes OptAttributes;
-
-		// These will happen after the semantic analysis
-		
-		// Hashtable defined_indexers;
-		// Hashtable defined_methods;
-		
-		/// <summary>
-		///   Modifiers allowed in a class declaration
-		/// </summary>
-		public const int AllowedModifiers =
-			Modifiers.NEW       |
-			Modifiers.PUBLIC    |
-			Modifiers.PROTECTED |
-			Modifiers.INTERNAL  |
-		 	Modifiers.UNSAFE    |
-			Modifiers.PRIVATE;
-
-		public Interface (TypeContainer parent, string name, int mod, Attributes attrs, Location l)
-			: base (parent, name, l)
-		{
-			ModFlags = Modifiers.Check (AllowedModifiers, mod, Modifiers.PRIVATE, l);
-			OptAttributes = attrs;
-			
-			method_builders = new ArrayList ();
-			property_builders = new ArrayList ();
-		}
-
-		public AdditionResult AddMethod (InterfaceMethod imethod)
-		{
-			string name = imethod.Name;
-			Object value = defined_names [name];
-
-			if (value != null){
-				if (!(value is InterfaceMethod))
-					return AdditionResult.NameExists;
-			} 
-
-			if (defined_method == null)
-				defined_method = new ArrayList ();
-
-			defined_method.Add (imethod);
-			if (value == null)
-				DefineName (name, imethod);
-			
-			return AdditionResult.Success;
-		}
-
-		public AdditionResult AddProperty (InterfaceProperty iprop)
-		{
-			AdditionResult res;
-			string name = iprop.Name;
-
-			if ((res = IsValid (name)) != AdditionResult.Success)
-				return res;
-
-			DefineName (name, iprop);
-
-			if (defined_properties == null)
-				defined_properties = new ArrayList ();
-
-			defined_properties.Add (iprop);
-			return AdditionResult.Success;
-		}
-
-		public AdditionResult AddEvent (InterfaceEvent ievent)
-		{
-			string name = ievent.Name;
-			AdditionResult res;
-			
-			if ((res = IsValid (name)) != AdditionResult.Success)
-				return res;
-
-			DefineName (name, ievent);
-
-			if (defined_events == null)
-				defined_events = new ArrayList ();
-
-			defined_events.Add (ievent);
-			return AdditionResult.Success;
-		}
-
-		public bool AddIndexer (InterfaceIndexer iindexer)
-		{
-			if (defined_indexer == null)
-				defined_indexer = new ArrayList ();
-			
-			defined_indexer.Add (iindexer);
-			return true;
-		}
-		
-		public ArrayList InterfaceMethods {
-			get {
-				return defined_method;
-			}
-		}
-
-		public ArrayList InterfaceProperties {
-			get {
-				return defined_properties;
-			}
-		}
-
-		public ArrayList InterfaceEvents {
-			get {
-				return defined_events;
-			}
-		}
-
-		public ArrayList InterfaceIndexers {
-			get {
-				return defined_indexer;
-			}
-		}
-
-		public ArrayList Bases {
-			get {
-				return bases;
-			}
-
-			set {
-				bases = value;
-			}
-		}
-
-		public bool IsTopLevel {
-			get {
-				if (Parent != null){
-					if (Parent.Parent == null)
-						return true;
-				}
-				return false;
-			}
-		}
-
-		public virtual TypeAttributes InterfaceAttr {
-			get {
-				TypeAttributes x = TypeAttributes.Interface | TypeAttributes.Abstract;
-
-				if (IsTopLevel == false) {
-					
-					if ((ModFlags & Modifiers.PROTECTED) != 0
-					    && (ModFlags & Modifiers.INTERNAL) != 0)
-						x |= TypeAttributes.NestedFamORAssem;
-					else if ((ModFlags & Modifiers.PROTECTED) != 0)
-						x |= TypeAttributes.NestedFamily;
-					else if ((ModFlags & Modifiers.INTERNAL) != 0)
-						x |= TypeAttributes.NestedAssembly;
-					else if ((ModFlags & Modifiers.PUBLIC) != 0)
-						x |= TypeAttributes.NestedPublic;
-					else
-						x |= TypeAttributes.NestedPrivate;
-				} else {
-					if ((ModFlags & Modifiers.PUBLIC) != 0)
-						x |= TypeAttributes.Public;
-					else if ((ModFlags & Modifiers.PRIVATE) != 0)
-						x |= TypeAttributes.NotPublic;
-				}
-				
-				if ((ModFlags & Modifiers.ABSTRACT) != 0)
-					x |= TypeAttributes.Abstract;
-				
-				if ((ModFlags & Modifiers.SEALED) != 0)
-					x |= TypeAttributes.Sealed;
-
-				return x;
-			}
-		}
-		
-		void Error111 (InterfaceMemberBase ib)
-		{
-			Report.Error (
-				111,
-				"Interface `" + Name + "' already contains a definition with the " +
-				"same return value and parameter types for member `" + ib.Name + "'");
-		}
-
-		bool RegisterMethod (MethodBase mb, InternalParameters ip, Type [] types)
-		{
-			if (!TypeManager.RegisterMethod (mb, ip, types))
-				return false;
-
-			method_builders.Add (mb);
-			return true;
-		}
-
-		public MethodInfo [] GetMethods ()
-		{
-			int n = method_builders.Count;
-			MethodInfo [] mi = new MethodInfo [n];
-			
-			method_builders.CopyTo (mi, 0);
-
-			return mi;
-		}
-
-		// Hack around System.Reflection as found everywhere else
-		public MemberInfo [] FindMembers (MemberTypes mt, BindingFlags bf, MemberFilter filter, object criteria)
-		{
-			ArrayList members = new ArrayList ();
-
-			if ((mt & MemberTypes.Method) != 0) {
-				foreach (MethodBuilder mb in method_builders)
-					if (filter (mb, criteria))
-						members.Add (mb);
-			}
-
-			if ((mt & MemberTypes.Property) != 0) {
-				foreach (PropertyBuilder pb in property_builders)
-				        if (filter (pb, criteria))
-				                members.Add (pb);
-			}
-
-			if ((bf & BindingFlags.DeclaredOnly) == 0){
-				MemberInfo [] parent_mi;
-				
-				parent_mi = TypeContainer.FindMembers (
-					TypeBuilder.BaseType, mt, bf, filter, criteria);
-
-				if (parent_mi != null)
-					members.AddRange (parent_mi);
-			}
-			
-			// The rest of the cases, if any, are unhandled at present.
-
-			int count = members.Count;
-
-			if (count > 0) {
-				MemberInfo [] mi = new MemberInfo [count];
-				members.CopyTo (mi, 0);
-				return mi;
-			}
-
-			return null;
-		}
-
-		//
-		// Populates the methods in the interface
-		//
-		void PopulateMethod (InterfaceMethod im)
-		{
-			Type return_type = RootContext.LookupType (this, im.ReturnType, false, im.Location);
-			Type [] arg_types = im.ParameterTypes (this);
-			MethodBuilder mb;
-			Parameter [] p;
-			int i;
-
-			if (return_type == null)
-				return;
-
-			if (return_type.IsPointer && !UnsafeOK (this))
-				return;
-
-			foreach (Type t in arg_types){
-
-				if (t == null)
-					return;
-				
-				if (t.IsPointer && !UnsafeOK (this))
-					return;
-			}
-			
-			//
-			// Create the method
-			//
-			mb = TypeBuilder.DefineMethod (
-				im.Name, interface_method_attributes,
-				return_type, arg_types);
-
-			InternalParameters ip = new InternalParameters (arg_types, im.Parameters);
-			
-			if (!RegisterMethod (mb, ip, arg_types)) {
-				Error111 (im);
-				return;
-			}
-
-			//
-			// Define each type attribute (in/out/ref) and
-			// the argument names.
-			//
-			p = im.Parameters.FixedParameters;
-			if (p != null){
-				for (i = 0; i < p.Length; i++)
-					mb.DefineParameter (i + 1, p [i].Attributes, p [i].Name);
-
-				if (i != arg_types.Length)
-					Console.WriteLine ("Implement the type definition for params");
-			}
-		}
-
-		//
-		// Populates the properties in the interface
-		//
-		void PopulateProperty (InterfaceProperty ip)
-		{
-			PropertyBuilder pb;
-			MethodBuilder get = null, set = null;
-			Type prop_type = RootContext.LookupType (this, ip.Type, false, ip.Location);
-			Type [] setter_args = new Type [1];
-
-			if (prop_type == null)
-				return;
-
-			if (prop_type.IsPointer && !UnsafeOK (this))
-				return;
-			
-			setter_args [0] = prop_type;
-
-			//
-			// FIXME: properties are missing the following
-			// flags: hidebysig newslot specialname
-			//
-			pb = TypeBuilder.DefineProperty (
-				ip.Name, PropertyAttributes.None,
-				prop_type, null);
-
-			if (ip.HasGet){
-				get = TypeBuilder.DefineMethod (
-					"get_" + ip.Name, property_attributes ,
-					prop_type, null);
-
-				//
-				// HACK because System.Reflection.Emit is lame
-				//
-				Type [] null_types = null;
-				InternalParameters inp = new InternalParameters
-					(null_types, Parameters.GetEmptyReadOnlyParameters ());
-				
-				if (!RegisterMethod (get, inp, null)) {
-					Error111 (ip);
-					return;
-				}
-				
-				pb.SetGetMethod (get);
-			}
-
-			if (ip.HasSet){
-				setter_args [0] = prop_type;
-
-				set = TypeBuilder.DefineMethod (
-					"set_" + ip.Name, property_attributes,
-					TypeManager.void_type, setter_args);
-
-				set.DefineParameter (1, ParameterAttributes.None, "value");
-				pb.SetSetMethod (set);
-
-				//
-				// HACK because System.Reflection.Emit is lame
-				//
-				Parameter [] parms = new Parameter [1];
-				parms [0] = new Parameter (ip.Type, "value", Parameter.Modifier.NONE, null);
-				InternalParameters ipp = new InternalParameters (
-					Parent, new Parameters (parms, null, Location.Null));
-					
-				if (!RegisterMethod (set, ipp, setter_args)) {
-					Error111 (ip);
-					return;
-				}
-			}
-
-			TypeManager.RegisterProperty (pb, get, set);
-			property_builders.Add (pb);
-		}
-
-		//
-		// Populates the events in the interface
-		//
-		void PopulateEvent (InterfaceEvent ie)
-		{
-			//
-		        // FIXME: We need to do this after delegates have been
-			// declared or we declare them recursively.
-			//
-		}
-
-		//
-		// Populates the indexers in the interface
-		//
-		void PopulateIndexer (InterfaceIndexer ii)
-		{
-			PropertyBuilder pb;
-			Type prop_type = RootContext.LookupType (this, ii.Type, false, ii.Location);
-			Type [] arg_types = ii.ParameterTypes (this);
-			Type [] value_arg_types;
-
-			if (prop_type == null)
-				return;
-
-			if (prop_type.IsPointer && !UnsafeOK (this))
-				return;
-			
-			//
-			// Sets up the extra invisible `value' argument for setters.
-			// 
-			if (arg_types != null){
-				int count = arg_types.Length;
-				value_arg_types = new Type [count + 1];
-
-				arg_types.CopyTo (value_arg_types, 0);
-				value_arg_types [count] = prop_type;
-
-				foreach (Type t in arg_types){
-					if (t.IsPointer && !UnsafeOK (this))
-						return;
-				}
-			} else {
-				value_arg_types = new Type [1];
-
-				value_arg_types [1] = prop_type;
-			}
-
-			pb = TypeBuilder.DefineProperty (
-				"Item", PropertyAttributes.None,
-				prop_type, arg_types);
-
-			if (ii.HasGet){
-				MethodBuilder get_item;
-				Parameter [] p = ii.Parameters.FixedParameters;
-				
-				get_item = TypeBuilder.DefineMethod (
-					"get_Item", property_attributes, prop_type, arg_types);
-				pb.SetGetMethod (get_item);
-				//
-				// HACK because System.Reflection.Emit is lame
-				//
-				InternalParameters ip = new InternalParameters (
-					arg_types, ii.Parameters);
-				
-				if (!RegisterMethod (get_item, ip, arg_types)) {
-					Error111 (ii);
-					return;
-				}
-
-				if (p != null){
-					for (int i = 0; i < p.Length; i++)
-						get_item.DefineParameter (
-							i + 1,
-							p [i].Attributes, p [i].Name);
-				}
-			}
-
-			if (ii.HasSet){
-				Parameter [] p = ii.Parameters.FixedParameters;
-				MethodBuilder set_item;
-				int i = 0;
-				
-				set_item = TypeBuilder.DefineMethod (
-					"set_Item", property_attributes,
-					TypeManager.void_type, value_arg_types);
-				pb.SetSetMethod (set_item);
-				//
-				// HACK because System.Reflection.Emit is lame
-				//
-				InternalParameters ip = new InternalParameters (
-					value_arg_types, ii.Parameters);
-				if (!RegisterMethod (set_item, ip, value_arg_types)) {
-					Error111 (ii);
-					return;
-				}
-
-				if (p != null){
-					for (; i < p.Length; i++)
-						set_item.DefineParameter (
-							i + 1,
-							p [i].Attributes, p [i].Name);
-				}
-				
-				set_item.DefineParameter (i + 1, ParameterAttributes.None, "value");
-			}
-		}
-
-		/// <summary>
-		///   Performs the semantic analysis for all the interface members
-		///   that were declared
-		/// </summary>
-		bool SemanticAnalysis ()
-		{
-			Hashtable methods = new Hashtable ();
-
-			
-			if (defined_method != null){
-				foreach (InterfaceMethod im in defined_method){
-					string sig = im.GetSignature (this);
-					
-					//
-					// If there was an undefined Type on the signatures
-					// 
-					if (sig == null)
-						continue;
-					
-					if (methods [sig] != null){
-						Error111 (im);
-						return false;
-					}
-				}
-			}
-
-			//
-			// FIXME: Here I should check i
-			// 
-			return true;
-		}
-
-		//
-		// Returns the Type that represents the interface whose name
-		// is `name'.
-		//
-		
-		Type GetInterfaceTypeByName (object builder, string name)
-		{
-			Interface parent;
-			Type t = RootContext.LookupType (this, name, false, Location);
-			
-			if (t != null) {
-				if (t.IsInterface)
-					return t;
-				
-				string cause;
-				
-				if (t.IsValueType)
-					cause = "is a struct";
-				else if (t.IsClass) 
-					cause = "is a class";
-				else
-					cause = "Should not happen.";
-
-				Report.Error (527, Location, "`"+name+"' " + cause +
-					      ", need an interface instead");
-				
-				return null;
-			}
-
-			Tree tree = RootContext.Tree;
-			parent = (Interface) tree.Interfaces [name];
-			if (parent == null){
-				string cause = null;
-				Hashtable container;
-				
-				container = tree.Classes;
-				if (container != null && container [name] != null)
-					cause = "is a class";
-				else {
-					container = tree.Structs;
-					
-					if (container != null && container [name] != null)
-						cause = "is a struct";
-				}
-
-				if (cause == null){
-					Report.Error (246, Location, "Can not find type `"+name+"'");
-				} else {
-					Report.Error (527, Location, "`"+name+"' " + cause +
-						      ", need an interface instead");
-				}
-				return null;
-			}
-			
-			t = parent.DefineInterface (builder);
-			if (t == null){
-				Report.Error (529,
-					      "Inherited interface `"+name+"' is circular");
-				return null;
-			}
-
-			return t;
-		}
-		
-		//
-		// Returns the list of interfaces that this interface implements
-		// Or null if it does not implement any interface.
-		//
-		// Sets the error boolean accoringly.
-		//
-		Type [] GetInterfaceBases (object builder, out bool error)
-		{
-			Type [] tbases;
-			int i;
-
-			error = false;
-			if (Bases == null)
-				return null;
-			
-			tbases = new Type [Bases.Count];
-			i = 0;
-
-			foreach (string name in Bases){
-				Type t;
-				
-				t = GetInterfaceTypeByName (builder, name);
-				if (t == null){
-					error = true;
-					return null;
-				}
-				
-				tbases [i++] = t;
-			}
-			
-			return tbases;
-		}
-		
-		//
-		// <summary>
-		//  Defines the Interface in the appropriate ModuleBuilder or TypeBuilder
-		// </summary>
-		// TODO:
-		//   Rework the way we recurse, because for recursive
-		//   definitions of interfaces (A:B and B:A) we report the
-		//   error twice, rather than once.  
-		
-		public TypeBuilder DefineInterface (object parent_builder)
-		{
-			Type [] ifaces;
-			bool error;
-
-			if (InTransit)
-				return null;
-			
-			InTransit = true;
-			
-			ifaces = GetInterfaceBases (parent_builder, out error);
-
-			if (error)
-				return null;
-
-			if (parent_builder is ModuleBuilder) {
-				ModuleBuilder builder = (ModuleBuilder) parent_builder;
-				
-				TypeBuilder = builder.DefineType (
-					Name,
-					InterfaceAttr,
-					(Type)null,   // Parent Type
-					ifaces);
-				RootContext.RegisterOrder (this);
-			} else {
-				TypeBuilder builder = (System.Reflection.Emit.TypeBuilder) parent_builder;
-
-				TypeBuilder = builder.DefineNestedType (
-					Basename,
-					InterfaceAttr,
-					(Type) null, //parent type
-					ifaces);
-
-				TypeContainer tc = TypeManager.LookupTypeContainer (builder);
-				tc.RegisterOrder (this);
-			}
-			
-			RootContext.TypeManager.AddUserInterface (Name, TypeBuilder, this);
-			InTransit = false;
-			
-			return TypeBuilder;
-		}
-		
-		/// <summary>
-		///   Performs semantic analysis, and then generates the IL interfaces
-		/// </summary>
-		public override bool Define (TypeContainer parent)
-		{
-			if (!SemanticAnalysis ())
-				return false;
-
-			if (defined_method != null){
-				foreach (InterfaceMethod im in defined_method)
-					PopulateMethod (im);
-			}
-
-			if (defined_properties != null){
-				foreach (InterfaceProperty ip in defined_properties)
-					PopulateProperty (ip);
-			}
-
-			if (defined_events != null)
-				foreach (InterfaceEvent ie in defined_events)
-					PopulateEvent (ie);
-
-			if (defined_indexer != null) {
-				foreach (InterfaceIndexer ii in defined_indexer)
-					PopulateIndexer (ii);
-
-				CustomAttributeBuilder cb = EmitDefaultMemberAttr (parent, ModFlags, Location);
-				TypeBuilder.SetCustomAttribute (cb);
-			}
-			
-			return true;
-		}
-
-		public static CustomAttributeBuilder EmitDefaultMemberAttr (TypeContainer parent, int flags,
-									    Location loc)
-		{
-			EmitContext ec = new EmitContext (parent, loc, null, null, flags);
-
-			Expression ml = Expression.MemberLookup (ec, TypeManager.default_member_type,
-								 ".ctor", MemberTypes.Constructor,
-								 BindingFlags.Public | BindingFlags.Instance,
-								 Location.Null);
-			
-			if (!(ml is MethodGroupExpr)) {
-				Console.WriteLine ("Internal error !!!!");
-				return null;
-			}
-			
-			MethodGroupExpr mg = (MethodGroupExpr) ml;
-
-			MethodBase constructor = mg.Methods [0];
-
-			string [] vals = { "Item" };
-
-			CustomAttributeBuilder cb = new CustomAttributeBuilder ((ConstructorInfo) constructor, vals);
-
-			return cb;
-		}
-
-	}
-
-	public class InterfaceMemberBase {
-		public readonly string Name;
-		public readonly bool IsNew;
-		public Attributes OptAttributes;
-		
-		public InterfaceMemberBase (string name, bool is_new, Attributes attrs)
-		{
-			Name = name;
-			IsNew = is_new;
-			OptAttributes = attrs;
-		}
-	}
-	
-	public class InterfaceProperty : InterfaceMemberBase {
-		public readonly bool HasSet;
-		public readonly bool HasGet;
-		public readonly string Type;
-		public readonly string type;
-		public readonly Location Location;
-		
-		public InterfaceProperty (string type, string name,
-					  bool is_new, bool has_get, bool has_set,
-					  Attributes attrs, Location loc)
-			: base (name, is_new, attrs)
-		{
-			Type = type;
-			HasGet = has_get;
-			HasSet = has_set;
-			Location = loc;
-		}
-	}
-
-	public class InterfaceEvent : InterfaceMemberBase {
-		public readonly string Type;
-		
-		public InterfaceEvent (string type, string name, bool is_new, Attributes attrs)
-			: base (name, is_new, attrs)
-		{
-			Type = type;
-		}
-	}
-	
-	public class InterfaceMethod : InterfaceMemberBase {
-		public readonly string     ReturnType;
-		public readonly Parameters Parameters;
-		public readonly Location Location;
-		
-		public InterfaceMethod (string return_type, string name, bool is_new, Parameters args,
-					Attributes attrs, Location l)
-			: base (name, is_new, attrs)
-		{
-			this.ReturnType = return_type;
-			this.Parameters = args;
-			Location = l;
-		}
-
-		/// <summary>
-		///   Returns the signature for this interface method
-		/// </summary>
-		public string GetSignature (DeclSpace ds)
-		{
-			Type ret = RootContext.LookupType (ds, ReturnType, false, Location);
-			string args = Parameters.GetSignature (ds);
-
-			if ((ret == null) || (args == null))
-				return null;
-			
-			return (IsNew ? "new-" : "") + ret.FullName + "(" + args + ")";
-		}
-
-		public Type [] ParameterTypes (DeclSpace ds)
-		{
-			return Parameters.GetParameterInfo (ds);
-		}
-	}
-
-	public class InterfaceIndexer : InterfaceMemberBase {
-		public readonly bool HasGet, HasSet;
-		public readonly Parameters Parameters;
-		public readonly string Type;
-		public readonly Location Location;
-		
-		public InterfaceIndexer (string type, Parameters args, bool do_get, bool do_set,
-					 bool is_new, Attributes attrs, Location loc)
-			: base ("", is_new, attrs)
-		{
-			Type = type;
-			Parameters = args;
-			HasGet = do_get;
-			HasSet = do_set;
-			Location = loc;
-		}
-
-		public Type [] ParameterTypes (DeclSpace ds)
-		{
-			return Parameters.GetParameterInfo (ds);
-		}
-	}
-}
+//
+// interface.cs: Interface handler
+//
+// Author: Miguel de Icaza (miguel@gnu.org)
+//		   Anirban Bhattacharjee (banirban@novell.com)
+//
+// Licensed under the terms of the GNU GPL
+//
+// (C) 2001 Ximian, Inc (http://www.ximian.com)
+//
+
+#define CACHE
+
+/*This file will go off shortly
+ * after copying the interface class 
+ * in class.cs file
+ */
+
+using System.Collections;
+using System;
+using System.IO;
+using System.Reflection;
+using System.Reflection.Emit;
+
+namespace Mono.MonoBASIC {
+
+	/// <summary>
+	///   Interfaces
+	/// </summary>
+
+
+	/// <summary>
+	///   Interfaces
+	/// </summary>
+	public class Interface : Mono.MonoBASIC.Class /*TypeContainer , IMemberContainer */
+	{
+		/// <summary>
+		///   Modifiers allowed in a class declaration
+		/// </summary>
+		public new const int AllowedModifiers =
+			Modifiers.NEW       |
+			Modifiers.PUBLIC    |
+			Modifiers.PROTECTED |
+			Modifiers.INTERNAL  |
+			Modifiers.PRIVATE;
+
+		public Interface (TypeContainer parent, string name, int mod,
+							Attributes attrs, Location l)
+			: base (parent, name, 0, attrs, l)
+		{
+			int accmods;
+
+			if (parent.Parent == null)
+				accmods = Modifiers.INTERNAL;
+			else
+				accmods = Modifiers.PUBLIC;
+
+			this.ModFlags = Modifiers.Check (AllowedModifiers, mod, accmods, l);
+			this.ModFlags |= Modifiers.ABSTRACT;
+		}
+
+		public override AttributeTargets AttributeTargets {
+			get {
+				return AttributeTargets.Interface;
+			}
+		}
+
+		public override TypeAttributes TypeAttr 
+		{
+			get 
+			{
+				return base.TypeAttr |
+					TypeAttributes.AutoLayout |
+					TypeAttributes.Abstract |
+					TypeAttributes.Interface;
+			}
+		}
+	}
+
+/*
+	public class InterfaceMemberBase {
+		public readonly string Name;
+		public readonly bool IsNew;
+		public Attributes OptAttributes;
+		
+		public InterfaceMemberBase (string name, bool is_new, Attributes attrs)
+		{
+			Name = name;
+			IsNew = is_new;
+			OptAttributes = attrs;
+		}
+	}
+	
+	public class InterfaceProperty : InterfaceMemberBase {
+		public readonly bool HasSet;
+		public readonly bool HasGet;
+		public readonly Location Location;
+		public Expression Type;
+		
+		public InterfaceProperty (Expression type, string name,
+					  bool is_new, bool has_get, bool has_set,
+					  Attributes attrs, Location loc)
+			: base (name, is_new, attrs)
+		{
+			Type = type;
+			HasGet = has_get;
+			HasSet = has_set;
+			Location = loc;
+		}
+	}
+*/
+/*	public class InterfaceEvent : InterfaceMemberBase {
+		public readonly Location Location;
+		public Expression Type;
+		
+		public InterfaceEvent (Expression type, string name, bool is_new, Attributes attrs,
+				       Location loc)
+			: base (name, is_new, attrs)
+		{
+			Type = type;
+			Location = loc;
+		}
+	}
+/*	
+	public class InterfaceMethod : InterfaceMemberBase {
+		public readonly Expression ReturnType;
+		public readonly Parameters Parameters;
+		public readonly Location Location;
+		
+		public InterfaceMethod (Expression return_type, string name, bool is_new, Parameters args,
+					Attributes attrs, Location l)
+			: base (name, is_new, attrs)
+		{
+			this.ReturnType = return_type;
+			this.Parameters = args;
+			Location = l;
+		}
+
+		/// <summary>
+		///   Returns the signature for this interface method
+		/// </summary>
+		public string GetSignature (DeclSpace ds)
+		{
+			Type ret = ds.ResolveType (ReturnType, false, Location);
+			string args = Parameters.GetSignature (ds);
+
+			if ((ret == null) || (args == null))
+				return null;
+			
+			return (IsNew ? "new-" : "") + ret.FullName + "(" + args + ")";
+		}
+
+		public Type [] ParameterTypes (DeclSpace ds)
+		{
+			return Parameters.GetParameterInfo (ds);
+		}
+	}
+
+	public class InterfaceIndexer : InterfaceMemberBase {
+		public readonly bool HasGet, HasSet;
+		public readonly Parameters Parameters;
+		public readonly Location Location;
+		public Expression Type;
+		
+		public InterfaceIndexer (Expression type, Parameters args, bool do_get, bool do_set,
+					 bool is_new, Attributes attrs, Location loc)
+			: base ("", is_new, attrs)
+		{
+			Type = type;
+			Parameters = args;
+			HasGet = do_get;
+			HasSet = do_set;
+			Location = loc;
+		}
+
+		public Type [] ParameterTypes (DeclSpace ds)
+		{
+			return Parameters.GetParameterInfo (ds);
+		}
+	}*/
+}