2004-11-10 Martin Baulig <martin@localhost>
[mono.git] / mcs / gmcs / typemanager.cs
index 3b58e641c870fdfcb98dbfcdbcd7c5585c27ab21..7e08cc98e869e2dc961c620cfd63933cef7e337e 100755 (executable)
@@ -63,48 +63,65 @@ public class TypeManager {
        static public Type ienumerator_type;
        static public Type ienumerable_type;
        static public Type idisposable_type;
+       static public Type iconvertible_type;
        static public Type default_member_type;
        static public Type iasyncresult_type;
        static public Type asynccallback_type;
        static public Type intptr_type;
        static public Type monitor_type;
        static public Type runtime_field_handle_type;
+       static public Type runtime_argument_handle_type;
        static public Type attribute_type;
        static public Type attribute_usage_type;
        static public Type dllimport_type;
        static public Type unverifiable_code_type;
        static public Type methodimpl_attr_type;
        static public Type marshal_as_attr_type;
+       static public Type new_constraint_attr_type;
        static public Type param_array_type;
        static public Type guid_attr_type;
        static public Type void_ptr_type;
        static public Type indexer_name_type;
        static public Type exception_type;
+       static public Type activator_type;
        static public Type invalid_operation_exception_type;
-       static public object obsolete_attribute_type;
-       static public object conditional_attribute_type;
+       static public Type not_supported_exception_type;
+       static public Type obsolete_attribute_type;
+       static public Type conditional_attribute_type;
        static public Type in_attribute_type;
+       static public Type cls_compliant_attribute_type;
+       static public Type typed_reference_type;
+       static public Type arg_iterator_type;
+       static public Type mbr_type;
+       static public Type struct_layout_attribute_type;
+       static public Type field_offset_attribute_type;
+
+       static public Type generic_ienumerator_type;
+       static public Type generic_ienumerable_type;
 
        //
        // An empty array of types
        //
        static public Type [] NoTypes;
+       static public TypeExpr [] NoTypeExprs;
 
 
        // 
        // Expressions representing the internal types.  Used during declaration
        // definition.
        //
-       static public Expression system_object_expr, system_string_expr; 
-       static public Expression system_boolean_expr, system_decimal_expr;
-       static public Expression system_single_expr, system_double_expr;
-       static public Expression system_sbyte_expr, system_byte_expr;
-       static public Expression system_int16_expr, system_uint16_expr;
-       static public Expression system_int32_expr, system_uint32_expr;
-       static public Expression system_int64_expr, system_uint64_expr;
-       static public Expression system_char_expr, system_void_expr;
-       static public Expression system_asynccallback_expr;
-       static public Expression system_iasyncresult_expr;
+       static public TypeExpr system_object_expr, system_string_expr; 
+       static public TypeExpr system_boolean_expr, system_decimal_expr;
+       static public TypeExpr system_single_expr, system_double_expr;
+       static public TypeExpr system_sbyte_expr, system_byte_expr;
+       static public TypeExpr system_int16_expr, system_uint16_expr;
+       static public TypeExpr system_int32_expr, system_uint32_expr;
+       static public TypeExpr system_int64_expr, system_uint64_expr;
+       static public TypeExpr system_char_expr, system_void_expr;
+       static public TypeExpr system_asynccallback_expr;
+       static public TypeExpr system_iasyncresult_expr;
+       static public TypeExpr system_valuetype_expr;
+       static public TypeExpr system_intptr_expr;
 
        //
        // This is only used when compiling corlib
@@ -133,7 +150,10 @@ public class TypeManager {
        static public MethodInfo string_concat_string_string;
        static public MethodInfo string_concat_string_string_string;
        static public MethodInfo string_concat_string_string_string_string;
+       static public MethodInfo string_concat_string_dot_dot_dot;
        static public MethodInfo string_concat_object_object;
+       static public MethodInfo string_concat_object_object_object;
+       static public MethodInfo string_concat_object_dot_dot_dot;
        static public MethodInfo string_isinterneted_string;
        static public MethodInfo system_type_get_type_from_handle;
        static public MethodInfo object_getcurrent_void;
@@ -155,6 +175,7 @@ public class TypeManager {
        static public MethodInfo int_array_get_lower_bound_int;
        static public MethodInfo int_array_get_upper_bound_int;
        static public MethodInfo void_array_copyto_array_int;
+       static public MethodInfo activator_create_instance;
        
        //
        // The attribute constructors.
@@ -164,6 +185,7 @@ public class TypeManager {
        static public ConstructorInfo void_decimal_ctor_five_args;
        static public ConstructorInfo unverifiable_code_ctor;
        static public ConstructorInfo invalid_operation_ctor;
+       static public ConstructorInfo default_member_ctor;
        
        // <remarks>
        //   Holds the Array of Assemblies that have been loaded
@@ -173,10 +195,10 @@ public class TypeManager {
        static Assembly [] assemblies;
 
        // <remarks>
-       //  Keeps a list of module builders. We used this to do lookups
-       //  on the modulebuilder using GetType -- needed for arrays
+       //  Keeps a list of modules. We used this to do lookups
+       //  on the module using GetType -- needed for arrays
        // </remarks>
-       static ModuleBuilder [] modules;
+       static Module [] modules;
 
        // <remarks>
        //   This is the type_cache from the assemblies to avoid
@@ -204,6 +226,11 @@ public class TypeManager {
        // </remarks>
        static PtrHashtable builder_to_ifaces;
 
+       // <remarks>
+       //   Tracks the generic parameters.
+       // </remarks>
+       static PtrHashtable builder_to_type_param;
+
        // <remarks>
        //   Maps MethodBase.RuntimeTypeHandle to a Type array that contains
        //   the arguments to the method
@@ -223,22 +250,50 @@ public class TypeManager {
        static Hashtable method_internal_params;
 
        // <remarks>
-       //  Keeps track of attribute types
+       //  Keeps track of methods
        // </remarks>
 
-       static Hashtable builder_to_attr;
+       static Hashtable builder_to_method;
 
        // <remarks>
-       //  Keeps track of methods
+       //  Contains all public types from referenced assemblies.
+       //  This member is used only if CLS Compliance verification is required.
        // </remarks>
-
-       static Hashtable builder_to_method;
+       public static Hashtable all_imported_types;
 
        struct Signature {
                public string name;
                public Type [] args;
        }
 
+       public static void CleanUp ()
+       {
+               // Lets get everything clean so that we can collect before generating code
+               assemblies = null;
+               modules = null;
+               types = null;
+               typecontainers = null;
+               user_types = null;
+               builder_to_declspace = null;
+               builder_to_ifaces = null;
+               method_arguments = null;
+               indexer_arguments = null;
+               method_internal_params = null;
+               builder_to_method = null;
+               builder_to_type_param = null;
+               
+               fields = null;
+               references = null;
+               negative_hits = null;
+               builder_to_constant = null;
+               fieldbuilders_to_fields = null;
+               events = null;
+               priv_fields_events = null;
+               properties = null;
+               
+               TypeHandle.CleanUp ();
+       }
+
        /// <summary>
        ///   A filter for Findmembers that uses the Signature object to
        ///   extract objects
@@ -306,8 +361,10 @@ public class TypeManager {
                system_void_expr    = new TypeLookupExpression ("System.Void");
                system_asynccallback_expr = new TypeLookupExpression ("System.AsyncCallback");
                system_iasyncresult_expr = new TypeLookupExpression ("System.IAsyncResult");
+               system_valuetype_expr  = new TypeLookupExpression ("System.ValueType");
+               system_intptr_expr  = new TypeLookupExpression ("System.IntPtr");
        }
-       
+
        static TypeManager ()
        {
                assemblies = new Assembly [0];
@@ -318,14 +375,15 @@ public class TypeManager {
                typecontainers = new Hashtable ();
                
                builder_to_declspace = new PtrHashtable ();
-               builder_to_attr = new PtrHashtable ();
                builder_to_method = new PtrHashtable ();
                method_arguments = new PtrHashtable ();
                method_internal_params = new PtrHashtable ();
                indexer_arguments = new PtrHashtable ();
                builder_to_ifaces = new PtrHashtable ();
+               builder_to_type_param = new PtrHashtable ();
                
                NoTypes = new Type [0];
+               NoTypeExprs = new TypeExpr [0];
 
                signature_filter = new MemberFilter (SignatureFilter);
                InitExpressionTypes ();
@@ -344,7 +402,6 @@ public class TypeManager {
                        return;
                }
                
-               Location l;
                tc = builder_to_declspace [t] as TypeContainer;
                if (tc != null){
                        Report.Warning (
@@ -361,7 +418,7 @@ public class TypeManager {
                types.Add (name, t);
        }
        
-       public static void AddUserType (string name, TypeBuilder t, Type [] ifaces)
+       public static void AddUserType (string name, TypeBuilder t)
        {
                try {
                        types.Add (name, t);
@@ -369,25 +426,22 @@ public class TypeManager {
                        HandleDuplicate (name, t); 
                }
                user_types.Add (t);
-                       
-               if (ifaces != null)
-                       builder_to_ifaces [t] = ifaces;
        }
 
        //
        // This entry point is used by types that we define under the covers
        // 
-       public static void RegisterBuilder (TypeBuilder tb, Type [] ifaces)
+       public static void RegisterBuilder (Type tb, Type [] ifaces)
        {
                if (ifaces != null)
                        builder_to_ifaces [tb] = ifaces;
        }
        
-       public static void AddUserType (string name, TypeBuilder t, TypeContainer tc, Type [] ifaces)
+       public static void AddUserType (string name, TypeBuilder t, TypeContainer tc)
        {
                builder_to_declspace.Add (t, tc);
                typecontainers.Add (name, tc);
-               AddUserType (name, t, ifaces);
+               AddUserType (name, t);
        }
 
        public static void AddDelegateType (string name, TypeBuilder t, Delegate del)
@@ -411,20 +465,20 @@ public class TypeManager {
                builder_to_declspace.Add (t, en);
        }
 
-       public static void AddUserInterface (string name, TypeBuilder t, Interface i, Type [] ifaces)
+       public static void AddMethod (MethodBase builder, IMethodData method)
        {
-               AddUserType (name, t, ifaces);
-               builder_to_declspace.Add (t, i);
+               builder_to_method.Add (builder, method);
        }
 
-       public static void AddMethod (MethodBuilder builder, MethodData method)
+       public static IMethodData GetMethod (MethodBase builder)
        {
-               builder_to_method.Add (builder, method);
+               return (IMethodData) builder_to_method [builder];
        }
 
-       public static void RegisterAttrType (Type t, TypeContainer tc)
+       public static void AddTypeParameter (Type t, TypeParameter tparam)
        {
-               builder_to_attr.Add (t, tc);
+               if (!builder_to_type_param.Contains (t))
+                       builder_to_type_param.Add (t, tparam);
        }
 
        /// <summary>
@@ -444,6 +498,14 @@ public class TypeManager {
        {
                return builder_to_declspace [t] as TypeContainer;
        }
+
+       public static TypeContainer LookupGenericTypeContainer (Type t)
+       {
+               while (t.IsGenericInstance)
+                       t = t.GetGenericTypeDefinition ();
+
+               return LookupTypeContainer (t);
+       }
        
        public static IMemberContainer LookupMemberContainer (Type t)
        {
@@ -453,12 +515,23 @@ public class TypeManager {
                                return container;
                }
 
+               if (t is GenericTypeParameterBuilder) {
+                       IMemberContainer container = builder_to_type_param [t] as IMemberContainer;
+
+                       if (container != null)
+                               return container;
+               }
+
                return TypeHandle.GetTypeHandle (t);
        }
 
-       public static Interface LookupInterface (Type t)
+       public static TypeContainer LookupInterface (Type t)
        {
-               return builder_to_declspace [t] as Interface;
+               TypeContainer tc = (TypeContainer) builder_to_declspace [t];
+               if ((tc == null) || (tc.Kind != Kind.Interface))
+                       return null;
+
+               return tc;
        }
 
        public static Delegate LookupDelegate (Type t)
@@ -471,9 +544,35 @@ public class TypeManager {
                return builder_to_declspace [t] as Enum;
        }
        
-       public static TypeContainer LookupAttr (Type t)
+       public static Class LookupClass (Type t)
        {
-               return (TypeContainer) builder_to_attr [t];
+               return (Class) builder_to_declspace [t];
+       }
+
+       public static TypeParameter LookupTypeParameter (Type t)
+       {
+               return (TypeParameter) builder_to_type_param [t];
+       }
+
+       public static bool HasConstructorConstraint (Type t)
+       {
+               GenericConstraints gc = GetTypeParameterConstraints (t);
+               if (gc == null)
+                       return false;
+
+               return (gc.Attributes & GenericParameterAttributes.DefaultConstructorConstraint) != 0;
+       }
+
+       public static GenericConstraints GetTypeParameterConstraints (Type t)
+       {
+               if (!t.IsGenericParameter)
+                       throw new InvalidOperationException ();
+
+               TypeParameter tparam = LookupTypeParameter (t);
+               if (tparam != null)
+                       return tparam.GenericConstraints;
+
+               return new ReflectionConstraints (t);
        }
        
        /// <summary>
@@ -481,6 +580,11 @@ public class TypeManager {
        /// </summary>
        public static void AddAssembly (Assembly a)
        {
+               foreach (Assembly assembly in assemblies) {
+                       if (a == assembly)
+                               return;
+               }
+
                int top = assemblies.Length;
                Assembly [] n = new Assembly [top + 1];
 
@@ -490,13 +594,18 @@ public class TypeManager {
                assemblies = n;
        }
 
+        public static Assembly [] GetAssemblies ()
+        {
+                return assemblies;
+        }
+
        /// <summary>
        ///  Registers a module builder to lookup types from
        /// </summary>
-       public static void AddModule (ModuleBuilder mb)
+       public static void AddModule (Module mb)
        {
                int top = modules != null ? modules.Length : 0;
-               ModuleBuilder [] n = new ModuleBuilder [top + 1];
+               Module [] n = new Module [top + 1];
 
                if (modules != null)
                        modules.CopyTo (n, 0);
@@ -504,6 +613,12 @@ public class TypeManager {
                modules = n;
        }
 
+       public static Module[] Modules {
+               get {
+                       return modules;
+               }
+       }
+
        static Hashtable references = new Hashtable ();
        
        //
@@ -511,22 +626,7 @@ public class TypeManager {
        //
        public static Type GetReferenceType (Type t)
        {
-               string tname = t.FullName + "&";
-               
-               Type ret = t.Assembly.GetType (tname);
-
-               //
-               // If the type comes from the assembly we are building
-               // We need the Hashtable, because .NET 1.1 will return different instance types
-               // every time we call ModuleBuilder.GetType.
-               //
-               if (ret == null){
-                       if (references [t] == null)
-                               references [t] = CodeGen.ModuleBuilder.GetType (tname);
-                       ret = (Type) references [t];
-               }
-
-               return ret;
+               return t.MakeByRefType ();
        }
 
        static Hashtable pointers = new Hashtable ();
@@ -547,7 +647,7 @@ public class TypeManager {
                //
                if (ret == null){
                        if (pointers [t] == null)
-                               pointers [t] = CodeGen.ModuleBuilder.GetType (tname);
+                               pointers [t] = CodeGen.Module.Builder.GetType (tname);
                        
                        ret = (Type) pointers [t];
                }
@@ -589,7 +689,7 @@ public class TypeManager {
                        } while (t != null);
                }
 
-               foreach (ModuleBuilder mb in modules) {
+               foreach (Module mb in modules) {
                        t = mb.GetType (name);
                        if (t != null) 
                                return t;
@@ -622,6 +722,8 @@ public class TypeManager {
                return t;
        }
 
+       static readonly char [] dot_array = { '.' };
+
        /// <summary>
        ///   Returns the Type associated with @name, takes care of the fact that
        ///   reflection expects nested types to be separated from the main type
@@ -643,7 +745,8 @@ public class TypeManager {
                if (negative_hits.Contains (name))
                        return null;
 
-               string [] elements = name.Split ('.');
+               // Sadly, split takes a param array, so this ends up allocating *EVERY TIME*
+               string [] elements = name.Split (dot_array);
                int count = elements.Length;
 
                for (int n = 1; n <= count; n++){
@@ -657,7 +760,7 @@ public class TypeManager {
                        if (t == null){
                                t = LookupTypeReflection (top_level_type);
                                if (t == null){
-                                       negative_hits [top_level_type] = true;
+                                       negative_hits [top_level_type] = null;
                                        continue;
                                }
                        }
@@ -678,12 +781,12 @@ public class TypeManager {
                        //Console.WriteLine ("Looking up: " + newt + " " + name);
                        t = LookupTypeReflection (newt);
                        if (t == null)
-                               negative_hits [name] = true;
+                               negative_hits [name] = null;
                        else
                                types [name] = t;
                        return t;
                }
-               negative_hits [name] = true;
+               negative_hits [name] = null;
                return null;
        }
 
@@ -692,14 +795,13 @@ public class TypeManager {
        /// </summary>
        public static void ComputeNamespaces ()
        {
-               MethodInfo assembly_get_namespaces = typeof (Assembly).GetMethod ("GetNamespaces");
+               MethodInfo assembly_get_namespaces = typeof (Assembly).GetMethod ("GetNamespaces", BindingFlags.Instance|BindingFlags.NonPublic);
 
                //
                // First add the assembly namespaces
                //
                if (assembly_get_namespaces != null){
                        int count = assemblies.Length;
-                       int total;
 
                        for (int i = 0; i < count; i++){
                                Assembly a = assemblies [i];
@@ -711,19 +813,35 @@ public class TypeManager {
                                }
                        }
                } else {
-                       foreach (Assembly a in assemblies){
-                               foreach (Type t in a.GetTypes ()){
+                       Hashtable cache = new Hashtable ();
+                       cache.Add ("", null);
+                       foreach (Assembly a in assemblies) {
+                               foreach (Type t in a.GetExportedTypes ()) {
                                        string ns = t.Namespace;
-
-                                       // t.Namespace returns null for <PrivateImplDetails>
-                                       if (ns == ""|| ns == null)
+                                       if (ns == null || cache.Contains (ns))
                                                continue;
+
                                        Namespace.LookupNamespace (ns, true);
+                                       cache.Add (ns, null);
                                }
                        }
                }
        }
 
+       /// <summary>
+       /// Fills static table with exported types from all referenced assemblies.
+       /// This information is required for CLS Compliance tests.
+       /// </summary>
+       public static void LoadAllImportedTypes ()
+       {
+               all_imported_types = new Hashtable ();
+               foreach (Assembly a in assemblies) {
+                       foreach (Type t in a.GetExportedTypes ()) {
+                               all_imported_types [t.FullName] = t;
+                       }
+               }
+       }
+
        public static bool NamespaceClash (string name, Location loc)
        {
                if (Namespace.LookupNamespace (name, false) == null)
@@ -738,11 +856,14 @@ public class TypeManager {
        /// </summary>
        static public string CSharpName (Type t)
        {
+               if (t.FullName == null)
+                       return t.Name;
+
                return Regex.Replace (t.FullName, 
                        @"^System\." +
                        @"(Int32|UInt32|Int16|UInt16|Int64|UInt64|" +
                        @"Single|Double|Char|Decimal|Byte|SByte|Object|" +
-                       @"Boolean|String|Void)" +
+                       @"Boolean|String|Void|Null)" +
                        @"(\W+|\b)", 
                        new MatchEvaluator (CSharpNameMatch));
        }       
@@ -762,12 +883,90 @@ public class TypeManager {
                + match.Groups [2].Captures [0].Value;
        }
 
+        /// <summary>
+       ///  Returns the signature of the method with full namespace classification
+       /// </summary>
+       static public string GetFullNameSignature (MemberInfo mi)
+       {
+               return mi.DeclaringType.FullName.Replace ('+', '.') + '.' + mi.Name;
+       }
+               
+       static public string GetFullNameSignature (MethodBase mb)
+       {
+               string name = mb.Name;
+               if (name == ".ctor")
+                       name = mb.DeclaringType.Name;
+
+               if (mb.IsSpecialName) {
+                       if (name.StartsWith ("get_") || name.StartsWith ("set_")) {
+                               name = name.Remove (0, 4);
+                       }
+
+                       if (name == "Item")
+                               name = "this";
+               }
+
+               return mb.DeclaringType.FullName.Replace ('+', '.') + '.' + name;
+       }
+
+       static public string GetFullName (Type t)
+       {
+               if (t.FullName == null)
+                       return t.Name;
+
+               string name = t.FullName.Replace ('+', '.');
+
+               DeclSpace tc = LookupDeclSpace (t);
+               if ((tc != null) && tc.IsGeneric) {
+                       TypeParameter[] tparam = tc.TypeParameters;
+
+                       StringBuilder sb = new StringBuilder (name);
+                       sb.Append ("<");
+                       for (int i = 0; i < tparam.Length; i++) {
+                               if (i > 0)
+                                       sb.Append (",");
+                               sb.Append (tparam [i].Name);
+                       }
+                       sb.Append (">");
+                       return sb.ToString ();
+               } else if (t.HasGenericArguments && !t.IsGenericInstance) {
+                       Type[] tparam = t.GetGenericArguments ();
+
+                       StringBuilder sb = new StringBuilder (name);
+                       sb.Append ("<");
+                       for (int i = 0; i < tparam.Length; i++) {
+                               if (i > 0)
+                                       sb.Append (",");
+                               sb.Append (tparam [i].Name);
+                       }
+                       sb.Append (">");
+                       return sb.ToString ();
+               }
+
+               return name;
+       }
+
+       /// <summary>
+       ///   Returns the signature of the property and indexer
+       /// </summary>
+       static public string CSharpSignature (PropertyBuilder pb, bool is_indexer) 
+       {
+               if (!is_indexer) {
+                       return GetFullNameSignature (pb);
+               }
+
+               MethodBase mb = pb.GetSetMethod (true) != null ? pb.GetSetMethod (true) : pb.GetGetMethod (true);
+               string signature = GetFullNameSignature (mb);
+               string arg = TypeManager.LookupParametersByBuilder (mb).ParameterDesc (0);
+               return String.Format ("{0}.this[{1}]", signature.Substring (0, signature.LastIndexOf ('.')), arg);
+       }
+
         /// <summary>
         ///   Returns the signature of the method
         /// </summary>
         static public string CSharpSignature (MethodBase mb)
         {
-                string sig = "(";
+               StringBuilder sig = new StringBuilder ("(");
 
                //
                // FIXME: We should really have a single function to do
@@ -775,20 +974,28 @@ public class TypeManager {
                //
                 ParameterData iparams = LookupParametersByBuilder (mb);
 
-               if (iparams == null){
-                       ParameterInfo [] pi = mb.GetParameters ();
-                       iparams = new ReflectionParameters (pi);
-               }
+               if (iparams == null)
+                       iparams = new ReflectionParameters (mb);
+               
+               // Is property
+               if (mb.IsSpecialName && iparams.Count == 0 && !mb.IsConstructor)
+                       return GetFullNameSignature (mb);
                
                 for (int i = 0; i < iparams.Count; i++) {
                         if (i > 0) {
-                                sig += ", ";
+                               sig.Append (", ");
                         }
-                        sig += iparams.ParameterDesc(i);
+                       sig.Append (iparams.ParameterDesc (i));
                 }
-                sig += ")";
+               sig.Append (")");
+
+               // Is indexer
+               if (mb.IsSpecialName && iparams.Count == 1 && !mb.IsConstructor) {
+                       sig.Replace ('(', '[');
+                       sig.Replace (')', ']');
+               }
 
-                return mb.DeclaringType.Name + "." + mb.Name + sig;
+               return GetFullNameSignature (mb) + sig.ToString ();
         }
 
        /// <summary>
@@ -801,7 +1008,7 @@ public class TypeManager {
 
                if (t == null){
                        Report.Error (518, "The predefined type `" + name + "' is not defined or imported");
-                       Environment.Exit (0);
+                       Environment.Exit (1);
                }
 
                return t;
@@ -811,16 +1018,19 @@ public class TypeManager {
        ///   Returns the MethodInfo for a method named `name' defined
        ///   in type `t' which takes arguments of types `args'
        /// </summary>
-       static MethodInfo GetMethod (Type t, string name, Type [] args, bool report_errors)
+       static MethodInfo GetMethod (Type t, string name, Type [] args, bool is_private, bool report_errors)
        {
                MemberList list;
                Signature sig;
+               BindingFlags flags = instance_and_static | BindingFlags.Public;
 
                sig.name = name;
                sig.args = args;
                
-               list = FindMembers (t, MemberTypes.Method, instance_and_static | BindingFlags.Public,
-                                   signature_filter, sig);
+               if (is_private)
+                       flags |= BindingFlags.NonPublic;
+
+               list = FindMembers (t, MemberTypes.Method, flags, signature_filter, sig);
                if (list.Count == 0) {
                        if (report_errors)
                                Report.Error (-19, "Can not find the core function `" + name + "'");
@@ -837,6 +1047,11 @@ public class TypeManager {
                return mi;
        }
 
+       static MethodInfo GetMethod (Type t, string name, Type [] args, bool report_errors)
+       {
+               return GetMethod (t, name, args, false, report_errors);
+       }
+
        static MethodInfo GetMethod (Type t, string name, Type [] args)
        {
                return GetMethod (t, name, args, true);
@@ -913,6 +1128,7 @@ public class TypeManager {
                type_type     = CoreLookupType ("System.Type");
 
                runtime_field_handle_type = CoreLookupType ("System.RuntimeFieldHandle");
+               runtime_argument_handle_type = CoreLookupType ("System.RuntimeArgumentHandle");
                runtime_helpers_type = CoreLookupType ("System.Runtime.CompilerServices.RuntimeHelpers");
                default_member_type  = CoreLookupType ("System.Reflection.DefaultMemberAttribute");
                runtime_handle_type  = CoreLookupType ("System.RuntimeTypeHandle");
@@ -922,6 +1138,7 @@ public class TypeManager {
                ienumerable_type     = CoreLookupType ("System.Collections.IEnumerable");
                idisposable_type     = CoreLookupType ("System.IDisposable");
                icloneable_type      = CoreLookupType ("System.ICloneable");
+               iconvertible_type    = CoreLookupType ("System.IConvertible");
                monitor_type         = CoreLookupType ("System.Threading.Monitor");
                intptr_type          = CoreLookupType ("System.IntPtr");
 
@@ -930,8 +1147,12 @@ public class TypeManager {
                dllimport_type       = CoreLookupType ("System.Runtime.InteropServices.DllImportAttribute");
                methodimpl_attr_type = CoreLookupType ("System.Runtime.CompilerServices.MethodImplAttribute");
                marshal_as_attr_type = CoreLookupType ("System.Runtime.InteropServices.MarshalAsAttribute");
+               new_constraint_attr_type = CoreLookupType ("System.Runtime.CompilerServices.NewConstraintAttribute");
                param_array_type     = CoreLookupType ("System.ParamArrayAttribute");
                in_attribute_type    = CoreLookupType ("System.Runtime.InteropServices.InAttribute");
+               typed_reference_type = CoreLookupType ("System.TypedReference");
+               arg_iterator_type    = CoreLookupType ("System.ArgIterator");
+               mbr_type             = CoreLookupType ("System.MarshalByRefObject");
 
                //
                // Sigh. Remove this before the release.  Wonder what versions of Mono
@@ -946,13 +1167,25 @@ public class TypeManager {
                indexer_name_type     = CoreLookupType ("System.Runtime.CompilerServices.IndexerNameAttribute");
 
                exception_type        = CoreLookupType ("System.Exception");
+               activator_type        = CoreLookupType ("System.Activator");
                invalid_operation_exception_type = CoreLookupType ("System.InvalidOperationException");
+               not_supported_exception_type = CoreLookupType ("System.NotSupportedException");
 
                //
                // Attribute types
                //
                obsolete_attribute_type = CoreLookupType ("System.ObsoleteAttribute");
                conditional_attribute_type = CoreLookupType ("System.Diagnostics.ConditionalAttribute");
+               cls_compliant_attribute_type = CoreLookupType ("System.CLSCompliantAttribute");
+               struct_layout_attribute_type = CoreLookupType ("System.Runtime.InteropServices.StructLayoutAttribute");
+               field_offset_attribute_type = CoreLookupType ("System.Runtime.InteropServices.FieldOffsetAttribute");
+
+               //
+               // Generic types
+               //
+               generic_ienumerator_type     = CoreLookupType (MemberName.MakeName ("System.Collections.Generic.IEnumerator", 1));
+               generic_ienumerable_type     = CoreLookupType (MemberName.MakeName ("System.Collections.Generic.IEnumerable", 1));
+
 
                //
                // When compiling corlib, store the "real" types here.
@@ -990,7 +1223,7 @@ public class TypeManager {
 
                        MethodInfo set_corlib_type_builders = GetMethod (
                                system_assemblybuilder_type, "SetCorlibTypeBuilders",
-                               system_4_type_arg, false);
+                               system_4_type_arg, true, false);
 
                        if (set_corlib_type_builders != null) {
                                object[] args = new object [4];
@@ -999,12 +1232,12 @@ public class TypeManager {
                                args [2] = enum_type;
                                args [3] = void_type;
                                
-                               set_corlib_type_builders.Invoke (CodeGen.AssemblyBuilder, args);
+                               set_corlib_type_builders.Invoke (CodeGen.Assembly.Builder, args);
                        } else {
                                // Compatibility for an older version of the class libs.
                                set_corlib_type_builders = GetMethod (
                                        system_assemblybuilder_type, "SetCorlibTypeBuilders",
-                                       system_3_type_arg, true);
+                                       system_3_type_arg, true, true);
 
                                if (set_corlib_type_builders == null) {
                                        Report.Error (-26, "Corlib compilation is not supported in Microsoft.NET due to bugs in it");
@@ -1016,9 +1249,29 @@ public class TypeManager {
                                args [1] = value_type;
                                args [2] = enum_type;
                                
-                               set_corlib_type_builders.Invoke (CodeGen.AssemblyBuilder, args);
+                               set_corlib_type_builders.Invoke (CodeGen.Assembly.Builder, args);
                        }
                }
+
+               system_object_expr.Type = object_type;
+               system_string_expr.Type = string_type;
+               system_boolean_expr.Type = bool_type;
+               system_decimal_expr.Type = decimal_type;
+               system_single_expr.Type = float_type;
+               system_double_expr.Type = double_type;
+               system_sbyte_expr.Type = sbyte_type;
+               system_byte_expr.Type = byte_type;
+               system_int16_expr.Type = short_type;
+               system_uint16_expr.Type = ushort_type;
+               system_int32_expr.Type = int32_type;
+               system_uint32_expr.Type = uint32_type;
+               system_int64_expr.Type = int64_type;
+               system_uint64_expr.Type = uint64_type;
+               system_char_expr.Type = char_type;
+               system_void_expr.Type = void_type;
+               system_asynccallback_expr.Type = asynccallback_type;
+               system_iasyncresult_expr.Type = iasyncresult_type;
+               system_valuetype_expr.Type = value_type;
        }
 
        //
@@ -1038,10 +1291,19 @@ public class TypeManager {
                Type [] string_string_string_string = { string_type, string_type, string_type, string_type };
                string_concat_string_string_string_string = GetMethod (
                        string_type, "Concat", string_string_string_string);
+               Type[] params_string = { TypeManager.LookupType ("System.String[]") };
+               string_concat_string_dot_dot_dot = GetMethod (
+                       string_type, "Concat", params_string);
 
                Type [] object_object = { object_type, object_type };
                string_concat_object_object = GetMethod (
                        string_type, "Concat", object_object);
+               Type [] object_object_object = { object_type, object_type, object_type };
+               string_concat_object_object_object = GetMethod (
+                       string_type, "Concat", object_object_object);
+               Type[] params_object = { TypeManager.LookupType ("System.Object[]") };
+               string_concat_object_dot_dot_dot = GetMethod (
+                       string_type, "Concat", params_object);
 
                Type [] string_ = { string_type };
                string_isinterneted_string = GetMethod (
@@ -1135,6 +1397,8 @@ public class TypeManager {
                unverifiable_code_ctor = GetConstructor (
                        unverifiable_code_type, void_arg);
 
+               default_member_ctor = GetConstructor (default_member_type, string_);
+
                //
                // InvalidOperationException
                //
@@ -1145,12 +1409,14 @@ public class TypeManager {
                // Object
                object_ctor = GetConstructor (object_type, void_arg);
 
+               // Activator
+               Type [] type_arg = { type_type };
+               activator_create_instance = GetMethod (
+                       activator_type, "CreateInstance", type_arg);
        }
 
        const BindingFlags instance_and_static = BindingFlags.Static | BindingFlags.Instance;
 
-       static Hashtable type_hash = new Hashtable ();
-
        /// <remarks>
        ///   This is the "old", non-cache based FindMembers() function.  We cannot use
        ///   the cache here because there is no member name argument.
@@ -1179,6 +1445,16 @@ public class TypeManager {
                if (t.IsSubclassOf (TypeManager.array_type))
                        return new MemberList (TypeManager.array_type.FindMembers (mt, bf, filter, criteria));
 
+               if (t is GenericTypeParameterBuilder) {
+                       TypeParameter tparam = (TypeParameter) builder_to_type_param [t];
+
+                       Timer.StartTimer (TimerType.FindMembers);
+                       MemberList list = tparam.FindMembers (
+                               mt, bf | BindingFlags.DeclaredOnly, filter, criteria);
+                       Timer.StopTimer (TimerType.FindMembers);
+                       return list;
+               }
+
                //
                // Since FindMembers will not lookup both static and instance
                // members, we emulate this behaviour here.
@@ -1223,11 +1499,9 @@ public class TypeManager {
        ///   our return value will already contain all inherited members and the caller don't need
        ///   to check base classes and interfaces anymore.
        /// </summary>
-       private static MemberList MemberLookup_FindMembers (Type t, MemberTypes mt, BindingFlags bf,
+       private static MemberInfo [] MemberLookup_FindMembers (Type t, MemberTypes mt, BindingFlags bf,
                                                            string name, out bool used_cache)
        {
-                bool not_loaded_corlib = (t.Assembly == CodeGen.AssemblyBuilder);
-                
                //
                // We have to take care of arrays specially, because GetType on
                // a TypeBuilder array will return a Type, not a TypeBuilder,
@@ -1258,6 +1532,7 @@ public class TypeManager {
                        }
 
                        // If there is no MemberCache, we need to use the "normal" FindMembers.
+                       // Note, this is a VERY uncommon route!
 
                        MemberList list;
                        Timer.StartTimer (TimerType.FindMembers);
@@ -1265,7 +1540,19 @@ public class TypeManager {
                                                 FilterWithClosure_delegate, name);
                        Timer.StopTimer (TimerType.FindMembers);
                        used_cache = false;
-                       return list;
+                       return (MemberInfo []) list;
+               }
+
+               if (t is GenericTypeParameterBuilder) {
+                       TypeParameter tparam = (TypeParameter) builder_to_type_param [t];
+
+                       MemberList list;
+                       Timer.StartTimer (TimerType.FindMembers);
+                       list = tparam.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
+                                                  FilterWithClosure_delegate, name);
+                       Timer.StopTimer (TimerType.FindMembers);
+                       used_cache = false;
+                       return (MemberInfo []) list;
                }
 
                //
@@ -1290,6 +1577,11 @@ public class TypeManager {
                        return false;
        }
 
+       public static bool IsBuiltinType (TypeContainer tc)
+       {
+               return IsBuiltinType (tc.TypeBuilder);
+       }
+
        //
        // This is like IsBuiltinType, but lacks decimal_type, we should also clean up
        // the pieces in the code where we use IsBuiltinType and special case decimal_type.
@@ -1307,6 +1599,9 @@ public class TypeManager {
 
        public static bool IsDelegateType (Type t)
        {
+               if (t.IsGenericInstance)
+                       t = t.GetGenericTypeDefinition ();
+
                if (t.IsSubclassOf (TypeManager.delegate_type))
                        return true;
                else
@@ -1315,7 +1610,7 @@ public class TypeManager {
        
        public static bool IsEnumType (Type t)
        {
-               if (t == TypeManager.enum_type || t.IsSubclassOf (TypeManager.enum_type))
+               if (t.IsSubclassOf (TypeManager.enum_type))
                        return true;
                else
                        return false;
@@ -1340,6 +1635,40 @@ public class TypeManager {
 
                return ds.IsGeneric;
        }
+
+       public static bool HasGenericArguments (Type t)
+       {
+               return GetNumberOfTypeArguments (t) > 0;
+       }
+
+       public static int GetNumberOfTypeArguments (Type t)
+       {
+               DeclSpace tc = LookupDeclSpace (t);
+               if (tc != null)
+                       return tc.IsGeneric ? tc.CountTypeParameters : 0;
+               else
+                       return t.HasGenericArguments ? t.GetGenericArguments ().Length : 0;
+       }
+
+       public static Type[] GetTypeArguments (Type t)
+       {
+               DeclSpace tc = LookupDeclSpace (t);
+               if (tc != null) {
+                       if (!tc.IsGeneric)
+                               throw new InvalidOperationException ();
+
+                       TypeParameter[] tparam = tc.TypeParameters;
+                       Type[] ret = new Type [tparam.Length];
+                       for (int i = 0; i < tparam.Length; i++) {
+                               ret [i] = tparam [i].Type;
+                               if (ret [i] == null)
+                                       throw new InternalErrorException ();
+                       }
+
+                       return ret;
+               } else
+                       return t.GetGenericArguments ();
+       }
        
        //
        // Whether a type is unmanaged.  This is used by the unsafe code (25.2)
@@ -1359,12 +1688,15 @@ public class TypeManager {
                        if (t is TypeBuilder){
                                TypeContainer tc = LookupTypeContainer (t);
 
+                               if (tc.Fields != null){
                                foreach (Field f in tc.Fields){
                                        if (f.FieldBuilder.IsStatic)
                                                continue;
                                        if (!IsUnmanagedType (f.FieldBuilder.FieldType))
                                                return false;
                                }
+                               } else
+                                       return true;
                        } else {
                                FieldInfo [] fields = t.GetFields ();
 
@@ -1388,121 +1720,370 @@ public class TypeManager {
        
        public static bool IsInterfaceType (Type t)
        {
-               Interface iface = builder_to_declspace [t] as Interface;
-
-               if (iface != null)
-                       return true;
-               else
+               TypeContainer tc = (TypeContainer) builder_to_declspace [t];
+               if (tc == null)
                        return false;
-       }
-
-       //
-       // Checks whether `type' is a subclass or nested child of `parent'.
-       //
-       public static bool IsSubclassOrNestedChildOf (Type type, Type parent)
-       {
-               do {
-                       if ((type == parent) || type.IsSubclassOf (parent))
-                               return true;
-
-                       // Handle nested types.
-                       type = type.DeclaringType;
-               } while (type != null);
 
-               return false;
+               return tc.Kind == Kind.Interface;
        }
 
-       //
-       // Checks whether `type' is a nested child of `parent'.
-       //
-       public static bool IsNestedChildOf (Type type, Type parent)
+       public static bool IsEqual (Type a, Type b)
        {
-               if (type == parent)
-                       return false;
+               if (a.Equals (b))
+                       return true;
 
-               type = type.DeclaringType;
-               while (type != null) {
-                       if (type == parent)
-                               return true;
+               if ((a is TypeBuilder) && a.IsGenericTypeDefinition && b.IsGenericInstance) {
+                       //
+                       // `a' is a generic type definition's TypeBuilder and `b' is a
+                       // generic instance of the same type.
+                       //
+                       // Example:
+                       //
+                       // class Stack<T>
+                       // {
+                       //     void Test (Stack<T> stack) { }
+                       // }
+                       //
+                       // The first argument of `Test' will be the generic instance
+                       // "Stack<!0>" - which is the same type than the "Stack" TypeBuilder.
+                       //
+                       //
+                       // We hit this via Closure.Filter() for gen-82.cs.
+                       //
+                       if (a != b.GetGenericTypeDefinition ())
+                               return false;
 
-                       type = type.DeclaringType;
-               }
+                       Type[] aparams = a.GetGenericArguments ();
+                       Type[] bparams = b.GetGenericArguments ();
 
-               return false;
-       }
+                       if (aparams.Length != bparams.Length)
+                               return false;
 
-        //
-        // Do the right thing when returning the element type of an
-        // array type based on whether we are compiling corlib or not
-        //
-        public static Type GetElementType (Type t)
-        {
-                if (RootContext.StdLib)
-                        return t.GetElementType ();
-                else
-                        return TypeToCoreType (t.GetElementType ());
-        }
+                       for (int i = 0; i < aparams.Length; i++)
+                               if (!IsEqual (aparams [i], bparams [i]))
+                                       return false;
 
-       /// <summary>
-       ///   Returns the User Defined Types
-       /// </summary>
-       public static ArrayList UserTypes {
-               get {
-                       return user_types;
+                       return true;
                }
-       }
 
-       public static Hashtable TypeContainers {
-               get {
-                       return typecontainers;
+               if (a.IsGenericParameter && b.IsGenericParameter) {
+                       if ((a.DeclaringMethod == null) || (b.DeclaringMethod == null))
+                               return false;
+                       return a.GenericParameterPosition == b.GenericParameterPosition;
                }
-       }
 
-       static Hashtable attr_to_allowmult;
+               if (a.IsArray && b.IsArray) {
+                       if (a.GetArrayRank () != b.GetArrayRank ())
+                               return false;
+                       return IsEqual (a.GetElementType (), b.GetElementType ());
+               }
 
-       public static void RegisterAttributeAllowMultiple (Type attr_type, bool allow)
-       {
-               if (attr_to_allowmult == null)
-                       attr_to_allowmult = new PtrHashtable ();
+               if (a.IsGenericInstance && b.IsGenericInstance) {
+                       Type at = a.GetGenericTypeDefinition ();
+                       Type bt = b.GetGenericTypeDefinition ();
 
-               if (attr_to_allowmult.Contains (attr_type))
-                       return;
+                       if (a.GetGenericTypeDefinition () != b.GetGenericTypeDefinition ())
+                               return false;
 
-               attr_to_allowmult.Add (attr_type, allow);
-                              
-       }
+                       Type[] aargs = a.GetGenericArguments ();
+                       Type[] bargs = b.GetGenericArguments ();
 
-       public static bool AreMultipleAllowed (Type attr_type)
-       {
-               if (!(attr_type is TypeBuilder)) {
-                       System.Attribute [] attrs = System.Attribute.GetCustomAttributes (attr_type);
+                       if (aargs.Length != bargs.Length)
+                               return false;
 
-                       foreach (System.Attribute tmp in attrs)
-                               if (tmp is AttributeUsageAttribute) {
-                                        return ((AttributeUsageAttribute) tmp).AllowMultiple;
-                                }
+                       for (int i = 0; i < aargs.Length; i++) {
+                               if (!IsEqual (aargs [i], bargs [i]))
+                                       return false;
+                       }
 
-                       return false;
+                       return true;
                }
-               
-               if (attr_to_allowmult == null)
-                       return false;
 
-               return (bool) attr_to_allowmult [attr_type];
+               return false;
        }
 
-       static Hashtable builder_to_constant;
-
-       public static void RegisterConstant (FieldBuilder fb, Const c)
+       public static bool MayBecomeEqualGenericTypes (Type a, Type b)
        {
-               if (builder_to_constant == null)
-                       builder_to_constant = new PtrHashtable ();
-
-               if (builder_to_constant.Contains (fb))
-                       return;
+               if (a.IsGenericParameter) {
+                       //
+                       // If a is an array of a's type, they may never
+                       // become equal.
+                       //
+                       while (b.IsArray) {
+                               b = b.GetElementType ();
+                               if (a.Equals (b))
+                                       return false;
+                       }
 
-               builder_to_constant.Add (fb, c);
-       }
+                       //
+                       // If b is a generic parameter or an actual type,
+                       // they may become equal:
+                       //
+                       //    class X<T,U> : I<T>, I<U>
+                       //    class X<T> : I<T>, I<float>
+                       // 
+                       if (b.IsGenericParameter || !b.IsGenericInstance)
+                               return true;
+
+                       //
+                       // We're now comparing a type parameter with a
+                       // generic instance.  They may become equal unless
+                       // the type parameter appears anywhere in the
+                       // generic instance:
+                       //
+                       //    class X<T,U> : I<T>, I<X<U>>
+                       //        -> error because you could instanciate it as
+                       //           X<X<int>,int>
+                       //
+                       //    class X<T> : I<T>, I<X<T>> -> ok
+                       //
+
+                       Type[] bargs = GetTypeArguments (b);
+                       for (int i = 0; i < bargs.Length; i++) {
+                               if (a.Equals (bargs [i]))
+                                       return false;
+                       }
+
+                       return true;
+               }
+
+               if (b.IsGenericParameter)
+                       return MayBecomeEqualGenericTypes (b, a);
+
+               //
+               // At this point, neither a nor b are a type parameter.
+               //
+               // If one of them is a generic instance, let
+               // MayBecomeEqualGenericInstances() compare them (if the
+               // other one is not a generic instance, they can never
+               // become equal).
+               //
+
+               if (a.IsGenericInstance || b.IsGenericInstance)
+                       return MayBecomeEqualGenericInstances (a, b);
+
+               //
+               // If both of them are arrays.
+               //
+
+               if (a.IsArray && b.IsArray) {
+                       if (a.GetArrayRank () != b.GetArrayRank ())
+                               return false;
+                       
+                       a = a.GetElementType ();
+                       b = b.GetElementType ();
+
+                       return MayBecomeEqualGenericTypes (a, b);
+               }
+
+               //
+               // Ok, two ordinary types.
+               //
+
+               return a.Equals (b);
+       }
+
+       //
+       // Checks whether two generic instances may become equal for some
+       // particular instantiation (26.3.1).
+       //
+       public static bool MayBecomeEqualGenericInstances (Type a, Type b)
+       {
+               if (!a.IsGenericInstance || !b.IsGenericInstance)
+                       return false;
+               if (a.GetGenericTypeDefinition () != b.GetGenericTypeDefinition ())
+                       return false;
+
+               Type[] aargs = GetTypeArguments (a);
+               Type[] bargs = GetTypeArguments (b);
+
+               if (aargs.Length != bargs.Length)
+                       return false;
+
+               for (int i = 0; i < aargs.Length; i++) {
+                       if (MayBecomeEqualGenericTypes (aargs [i], bargs [i]))
+                               return true;
+               }
+
+               return false;
+       }
+
+       public static bool IsEqualGenericInstance (Type type, Type parent)
+       {
+               int tcount = GetNumberOfTypeArguments (type);
+               int pcount = GetNumberOfTypeArguments (parent);
+
+               if (type.IsGenericInstance)
+                       type = type.GetGenericTypeDefinition ();
+               if (parent.IsGenericInstance)
+                       parent = parent.GetGenericTypeDefinition ();
+
+               if (tcount != pcount)
+                       return false;
+
+               return type.Equals (parent);
+       }
+
+       public static bool IsSubclassOf (Type type, Type parent)
+       {
+               TypeParameter tparam = LookupTypeParameter (type);
+               TypeParameter pparam = LookupTypeParameter (parent);
+
+               if ((tparam != null) && (pparam != null)) {
+                       if (tparam == pparam)
+                               return true;
+
+                       return tparam.IsSubclassOf (parent);
+               }
+
+               do {
+                       if (type.Equals (parent))
+                               return true;
+
+                       type = type.BaseType;
+               } while (type != null);
+
+               return false;
+       }
+
+       public static bool IsPrivateAccessible (Type type, Type parent)
+       {
+               if (type.Equals (parent))
+                       return true;
+
+               if ((type is TypeBuilder) && type.IsGenericTypeDefinition && parent.IsGenericInstance) {
+                       //
+                       // `a' is a generic type definition's TypeBuilder and `b' is a
+                       // generic instance of the same type.
+                       //
+                       // Example:
+                       //
+                       // class Stack<T>
+                       // {
+                       //     void Test (Stack<T> stack) { }
+                       // }
+                       //
+                       // The first argument of `Test' will be the generic instance
+                       // "Stack<!0>" - which is the same type than the "Stack" TypeBuilder.
+                       //
+                       //
+                       // We hit this via Closure.Filter() for gen-82.cs.
+                       //
+                       if (type != parent.GetGenericTypeDefinition ())
+                               return false;
+
+                       return true;
+               }
+
+               if (type.IsGenericInstance && parent.IsGenericInstance) {
+                       Type tdef = type.GetGenericTypeDefinition ();
+                       Type pdef = parent.GetGenericTypeDefinition ();
+
+                       if (type.GetGenericTypeDefinition () != parent.GetGenericTypeDefinition ())
+                               return false;
+
+                       return true;
+               }
+
+               return false;
+       }
+
+       public static bool IsFamilyAccessible (Type type, Type parent)
+       {
+               TypeParameter tparam = LookupTypeParameter (type);
+               TypeParameter pparam = LookupTypeParameter (parent);
+
+               if ((tparam != null) && (pparam != null)) {
+                       if (tparam == pparam)
+                               return true;
+
+                       return tparam.IsSubclassOf (parent);
+               }
+
+               do {
+                       if (IsEqualGenericInstance (type, parent))
+                               return true;
+
+                       type = type.BaseType;
+               } while (type != null);
+
+               return false;
+       }
+
+       //
+       // Checks whether `type' is a subclass or nested child of `parent'.
+       //
+       public static bool IsNestedFamilyAccessible (Type type, Type parent)
+       {
+               do {
+                       if (IsFamilyAccessible (type, parent))
+                               return true;
+
+                       // Handle nested types.
+                       type = type.DeclaringType;
+               } while (type != null);
+
+               return false;
+       }
+
+       //
+       // Checks whether `type' is a nested child of `parent'.
+       //
+       public static bool IsNestedChildOf (Type type, Type parent)
+       {
+               if (IsEqual (type, parent))
+                       return false;
+
+               type = type.DeclaringType;
+               while (type != null) {
+                       if (IsEqual (type, parent))
+                               return true;
+
+                       type = type.DeclaringType;
+               }
+
+               return false;
+       }
+
+        //
+        // Do the right thing when returning the element type of an
+        // array type based on whether we are compiling corlib or not
+        //
+        public static Type GetElementType (Type t)
+        {
+                if (RootContext.StdLib)
+                        return t.GetElementType ();
+                else
+                        return TypeToCoreType (t.GetElementType ());
+        }
+
+       /// <summary>
+       ///   Returns the User Defined Types
+       /// </summary>
+       public static ArrayList UserTypes {
+               get {
+                       return user_types;
+               }
+       }
+
+       public static Hashtable TypeContainers {
+               get {
+                       return typecontainers;
+               }
+       }
+
+       static Hashtable builder_to_constant;
+
+       public static void RegisterConstant (FieldBuilder fb, Const c)
+       {
+               if (builder_to_constant == null)
+                       builder_to_constant = new PtrHashtable ();
+
+               if (builder_to_constant.Contains (fb))
+                       return;
+
+               builder_to_constant.Add (fb, c);
+       }
 
        public static Const LookupConstant (FieldBuilder fb)
        {
@@ -1521,15 +2102,13 @@ public class TypeManager {
        ///   for anything which is dynamic, and we need this in a number of places,
        ///   we register this information here, and use it afterwards.
        /// </remarks>
-       static public bool RegisterMethod (MethodBase mb, InternalParameters ip, Type [] args)
+       static public void RegisterMethod (MethodBase mb, InternalParameters ip, Type [] args)
        {
                if (args == null)
                        args = NoTypes;
                                
                method_arguments.Add (mb, args);
                method_internal_params.Add (mb, ip);
-               
-               return true;
        }
        
        static public InternalParameters LookupParametersByBuilder (MethodBase mb)
@@ -1552,20 +2131,24 @@ public class TypeManager {
        /// </summary>
        static public Type [] GetArgumentTypes (MethodBase mb)
        {
-               if (method_arguments.Contains (mb))
-                       return (Type []) method_arguments [mb];
-               else {
+               object t = method_arguments [mb];
+               if (t != null)
+                       return (Type []) t;
+
                        ParameterInfo [] pi = mb.GetParameters ();
                        int c = pi.Length;
-                       Type [] types = new Type [c];
+               Type [] types;
                        
+               if (c == 0) {
+                       types = NoTypes;
+               } else {
+                       types = new Type [c];
                        for (int i = 0; i < c; i++)
                                types [i] = pi [i].ParameterType;
-
+               }
                        method_arguments.Add (mb, types);
                        return types;
                }
-       }
 
        /// <summary>
        ///    Returns the argument types for an indexer based on its PropertyInfo
@@ -1641,17 +2224,14 @@ public class TypeManager {
        
        static Hashtable events;
 
-       static public bool RegisterEvent (MyEventBuilder eb, MethodBase add, MethodBase remove)
+       static public void RegisterEvent (MyEventBuilder eb, MethodBase add, MethodBase remove)
        {
                if (events == null)
                        events = new Hashtable ();
 
-               if (events.Contains (eb))
-                       return false;
-
+               if (!events.Contains (eb)) {
                events.Add (eb, new Pair (add, remove));
-
-               return true;
+               }
        }
 
        static public MethodInfo GetAddMethod (EventInfo ei)
@@ -1660,8 +2240,8 @@ public class TypeManager {
                        Pair pair = (Pair) events [ei];
 
                        return (MethodInfo) pair.First;
-               } else
-                       return ei.GetAddMethod ();
+               }
+               return ei.GetAddMethod (true);
        }
 
        static public MethodInfo GetRemoveMethod (EventInfo ei)
@@ -1670,8 +2250,8 @@ public class TypeManager {
                        Pair pair = (Pair) events [ei];
 
                        return (MethodInfo) pair.Second;
-               } else
-                       return ei.GetRemoveMethod ();
+               }
+               return ei.GetRemoveMethod (true);
        }
 
        static Hashtable priv_fields_events;
@@ -1723,6 +2303,64 @@ public class TypeManager {
                return true;
        }
 
+       public static bool CheckStructCycles (TypeContainer tc, Hashtable seen)
+       {
+               Hashtable hash = new Hashtable ();
+               return CheckStructCycles (tc, seen, hash);
+       }
+
+       public static bool CheckStructCycles (TypeContainer tc, Hashtable seen,
+                                             Hashtable hash)
+       {
+               if ((tc.Kind != Kind.Struct) || IsBuiltinType (tc))
+                       return true;
+
+               //
+               // `seen' contains all types we've already visited.
+               //
+               if (seen.Contains (tc))
+                       return true;
+               seen.Add (tc, null);
+
+               if (tc.Fields == null)
+                       return true;
+
+               foreach (Field field in tc.Fields) {
+                       if (field.FieldBuilder.IsStatic)
+                               continue;
+
+                       Type ftype = field.FieldBuilder.FieldType;
+                       TypeContainer ftc = LookupTypeContainer (ftype);
+                       if (ftc == null)
+                               continue;
+
+                       if (hash.Contains (ftc)) {
+                               Report.Error (523, tc.Location,
+                                             "Struct member `{0}.{1}' of type `{2}' " +
+                                             "causes a cycle in the struct layout",
+                                             tc.Name, field.Name, ftc.Name);
+                               return false;
+                       }
+
+                       //
+                       // `hash' contains all types in the current path.
+                       //
+                       hash.Add (tc, null);
+
+                       bool ok = CheckStructCycles (ftc, seen, hash);
+
+                       hash.Remove (tc);
+
+                       if (!ok)
+                               return false;
+
+                       if (!seen.Contains (ftc))
+                               seen.Add (ftc, null);
+               }
+
+               return true;
+       }
+
        /// <summary>
        ///   Given an array of interface types, expand and eliminate repeated ocurrences
        ///   of an interface.  
@@ -1732,15 +2370,19 @@ public class TypeManager {
        ///   This expands in context like: IA; IB : IA; IC : IA, IB; the interface "IC" to
        ///   be IA, IB, IC.
        /// </remarks>
-       public static Type [] ExpandInterfaces (Type [] base_interfaces)
+       public static Type[] ExpandInterfaces (EmitContext ec, TypeExpr [] base_interfaces)
        {
                ArrayList new_ifaces = new ArrayList ();
                
-               foreach (Type iface in base_interfaces){
-                       if (!new_ifaces.Contains (iface))
-                               new_ifaces.Add (iface);
+               foreach (TypeExpr iface in base_interfaces){
+                       Type itype = iface.ResolveType (ec);
+                       if (itype == null)
+                               return null;
+
+                       if (!new_ifaces.Contains (itype))
+                               new_ifaces.Add (itype);
                        
-                       Type [] implementing = TypeManager.GetInterfaces (iface);
+                       Type [] implementing = itype.GetInterfaces ();
                        
                        foreach (Type imp in implementing){
                                if (!new_ifaces.Contains (imp))
@@ -1752,12 +2394,19 @@ public class TypeManager {
                return ret;
        }
                
+       static PtrHashtable iface_cache = new PtrHashtable ();
+               
        /// <summary>
        ///   This function returns the interfaces in the type `t'.  Works with
        ///   both types and TypeBuilders.
        /// </summary>
        public static Type [] GetInterfaces (Type t)
        {
+               
+               Type [] cached = iface_cache [t] as Type [];
+               if (cached != null)
+                       return cached;
+               
                //
                // The reason for catching the Array case is that Reflection.Emit
                // will not return a TypeBuilder for Array types of TypeBuilder types,
@@ -1772,24 +2421,43 @@ public class TypeManager {
                        t = TypeManager.array_type;
                
                if (t is TypeBuilder){
-                       Type [] parent_ifaces;
+                       Type[] parent_ifaces;
                        
                        if (t.BaseType == null)
                                parent_ifaces = NoTypes;
                        else
                                parent_ifaces = GetInterfaces (t.BaseType);
-                       Type [] type_ifaces = (Type []) builder_to_ifaces [t];
+                       Type[] type_ifaces = (Type []) builder_to_ifaces [t];
                        if (type_ifaces == null)
                                type_ifaces = NoTypes;
 
                        int parent_count = parent_ifaces.Length;
-                       Type [] result = new Type [parent_count + type_ifaces.Length];
+                       Type[] result = new Type [parent_count + type_ifaces.Length];
                        parent_ifaces.CopyTo (result, 0);
                        type_ifaces.CopyTo (result, parent_count);
 
+                       iface_cache [t] = result;
                        return result;
-               } else
-                       return t.GetInterfaces ();
+               } else if (t is GenericTypeParameterBuilder){
+                       Type[] type_ifaces = (Type []) builder_to_ifaces [t];
+                       if (type_ifaces == null)
+                               type_ifaces = NoTypes;
+
+                       iface_cache [t] = type_ifaces;
+                       return type_ifaces;
+               } else {
+                       Type[] ifaces = t.GetInterfaces ();
+                       iface_cache [t] = ifaces;
+                       return ifaces;
+               }
+       }
+       
+       //
+       // gets the interfaces that are declared explicitly on t
+       //
+       public static Type [] GetExplicitInterfaces (TypeBuilder t)
+       {
+               return (Type []) builder_to_ifaces [t];
        }
        
        /// <remarks>
@@ -1985,6 +2653,8 @@ public class TypeManager {
                                return TypeManager.object_type;
                        if (t == typeof (System.Type))
                                return TypeManager.type_type;
+                       if (t == typeof (System.IntPtr))
+                               return TypeManager.intptr_type;
                        return t;
                }
        }
@@ -2021,28 +2691,18 @@ public class TypeManager {
        /// </summary>
        /// <remarks>
        ///   The default is not always `Item'.  The user can change this behaviour by
-       ///   using the DefaultMemberAttribute in the class.
+       ///   using the IndexerNameAttribute in the container.
        ///
        ///   For example, the String class indexer is named `Chars' not `Item' 
        /// </remarks>
        public static string IndexerPropertyName (Type t)
        {
-               if (t is TypeBuilder) {
-                       if (t.IsInterface) {
-                               Interface i = LookupInterface (t);
-
-                               if ((i == null) || (i.IndexerName == null))
-                                       return "Item";
-
-                               return i.IndexerName;
-                       } else {
-                               TypeContainer tc = LookupTypeContainer (t);
-
-                               if ((tc == null) || (tc.IndexerName == null))
-                                       return "Item";
+               if (t.IsGenericInstance)
+                       t = t.GetGenericTypeDefinition ();
 
-                               return tc.IndexerName;
-                       }
+               if (t is TypeBuilder) {
+                       TypeContainer tc = t.IsInterface ? LookupInterface (t) : LookupTypeContainer (t);
+                       return tc == null ? TypeContainer.DefaultIndexerName : tc.IndexerName;
                }
                
                System.Attribute attr = System.Attribute.GetCustomAttribute (
@@ -2052,18 +2712,30 @@ public class TypeManager {
                        return dma.MemberName;
                }
 
-               return "Item";
+               return TypeContainer.DefaultIndexerName;
        }
 
-       public static void MakePinned (LocalBuilder builder)
-       {
-               //
-               // FIXME: Flag the "LocalBuilder" type as being
-               // pinned.  Figure out API.
-               //
+       static MethodInfo declare_local_method = null;
+       
+       public static LocalBuilder DeclareLocalPinned (ILGenerator ig, Type t)
+       {
+               if (declare_local_method == null){
+                       declare_local_method = typeof (ILGenerator).GetMethod (
+                               "DeclareLocal",
+                               BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
+                               null, 
+                               new Type [] { typeof (Type), typeof (bool)},
+                               null);
+                       if (declare_local_method == null){
+                               Report.Warning (-24, new Location (-1),
+                                               "This version of the runtime does not support making pinned local variables.  " +
+                                       "This code may cause errors on a runtime with a moving GC");
+                               return ig.DeclareLocal (t);
+                       }
+               }
+               return (LocalBuilder) declare_local_method.Invoke (ig, new object [] { t, true });
        }
 
-
        //
        // Returns whether the array of memberinfos contains the given method
        //
@@ -2106,7 +2778,7 @@ public class TypeManager {
        //
        // The name is assumed to be the same.
        //
-       public static ArrayList CopyNewMethods (ArrayList target_list, MemberList new_members)
+       public static ArrayList CopyNewMethods (ArrayList target_list, IList new_members)
        {
                if (target_list == null){
                        target_list = new ArrayList ();
@@ -2130,152 +2802,95 @@ public class TypeManager {
                return target_list;
        }
 
-       [Flags]
-       public enum MethodFlags {
-               IsObsolete = 1,
-               IsObsoleteError = 1 << 1,
-               ShouldIgnore = 1 << 2
-       }
-       
-       //
-       // Returns the TypeManager.MethodFlags for this method.
-       // This emits an error 619 / warning 618 if the method is obsolete.
-       // In the former case, TypeManager.MethodFlags.IsObsoleteError is returned.
-       //
-       static public MethodFlags GetMethodFlags (MethodBase mb, Location loc)
+       static public bool IsGenericMethod (MethodBase mb)
        {
-               MethodFlags flags = 0;
-               
-               if (mb.DeclaringType is TypeBuilder){
-                       MethodData method = (MethodData) builder_to_method [mb];
-                       if (method == null) {
-                               // FIXME: implement Obsolete attribute on Property,
-                               //        Indexer and Event.
-                               return 0;
-                       }
-
-                       return method.GetMethodFlags (loc);
-               }
-
-#if FIXME
-               if (mb.IsInflatedGeneric) {
-                       MethodBase generic = mb.GetGenericMethodDefinition ();
-
-                       return GetMethodFlags (generic, loc);
-               }
-#endif
-
-               object [] attrs = mb.GetCustomAttributes (true);
-               foreach (object ta in attrs){
-                       if (!(ta is System.Attribute)){
-                               Console.WriteLine ("Unknown type in GetMethodFlags: " + ta);
-                               continue;
-                       }
-                       System.Attribute a = (System.Attribute) ta;
-                       if (a.TypeId == TypeManager.obsolete_attribute_type){
-                               ObsoleteAttribute oa = (ObsoleteAttribute) a;
-
-                               string method_desc = TypeManager.CSharpSignature (mb);
-
-                               if (oa.IsError) {
-                                       Report.Error (619, loc, "Method `" + method_desc +
-                                                     "' is obsolete: `" + oa.Message + "'");
-                                       return MethodFlags.IsObsoleteError;
-                               } else
-                                       Report.Warning (618, loc, "Method `" + method_desc +
-                                                       "' is obsolete: `" + oa.Message + "'");
-
-                               flags |= MethodFlags.IsObsolete;
-
-                               continue;
-                       }
-                       
-                       //
-                       // Skip over conditional code.
-                       //
-                       if (a.TypeId == TypeManager.conditional_attribute_type){
-                               ConditionalAttribute ca = (ConditionalAttribute) a;
+               if (mb.DeclaringType is TypeBuilder) {
+                       IMethodData method = (IMethodData) builder_to_method [mb];
+                       if (method == null)
+                               return false;
 
-                               if (RootContext.AllDefines [ca.ConditionString] == null)
-                                       flags |= MethodFlags.ShouldIgnore;
-                       }
+                       return method.GenericMethod != null;
                }
 
-               return flags;
+               return mb.IsGenericMethodDefinition;
        }
        
 #region MemberLookup implementation
        
-       //
-       // Name of the member
-       //
-       static string   closure_name;
-
        //
        // Whether we allow private members in the result (since FindMembers
        // uses NonPublic for both protected and private), we need to distinguish.
        //
-       static bool     closure_private_ok;
-
-       //
-       // Who is invoking us and which type is being queried currently.
-       //
-       static Type     closure_invocation_type;
-       static Type     closure_queried_type;
-       static Type     closure_qualifier_type;
-
-       //
-       // The assembly that defines the type is that is calling us
-       //
-       static Assembly closure_invocation_assembly;
 
        static internal bool FilterNone (MemberInfo m, object filter_criteria)
        {
                return true;
        }
-       
-       //
-       // This filter filters by name + whether it is ok to include private
-       // members in the search
-       //
-       static internal bool FilterWithClosure (MemberInfo m, object filter_criteria)
-       {
-               //
-               // Hack: we know that the filter criteria will always be in the `closure'
-               // fields. 
-               //
 
-               if ((filter_criteria != null) && (m.Name != (string) filter_criteria))
-                       return false;
+       internal class Closure {
+               internal bool     private_ok;
 
-               if (((closure_qualifier_type == null) || (closure_qualifier_type == closure_invocation_type)) &&
-                   (m.DeclaringType == closure_invocation_type))
-                       return true;
+               // Who is invoking us and which type is being queried currently.
+               internal Type     invocation_type;
+               internal Type     qualifier_type;
 
-               //
-               // Ugly: we need to find out the type of `m', and depending
-               // on this, tell whether we accept or not
-               //
-               if (m is MethodBase){
-                       MethodBase mb = (MethodBase) m;
+               // The assembly that defines the type is that is calling us
+               internal Assembly invocation_assembly;
+               internal IList almost_match;
+
+               private bool CheckValidFamilyAccess (bool is_static, MemberInfo m)
+               {
+                       if (invocation_type == null)
+                               return false;
+
+                       if (is_static)
+                               return true;
+                       
+                       // A nested class has access to all the protected members visible
+                       // to its parent.
+                       if (qualifier_type != null
+                           && TypeManager.IsNestedChildOf (invocation_type, qualifier_type))
+                               return true;
+
+                       if (invocation_type == m.DeclaringType
+                           || invocation_type.IsSubclassOf (m.DeclaringType)) {
+                               // Although a derived class can access protected members of
+                               // its base class it cannot do so through an instance of the
+                               // base class (CS1540).
+                               // => Ancestry should be: declaring_type ->* invocation_type
+                               //      ->*  qualified_type
+                               if (qualifier_type == null
+                                   || qualifier_type == invocation_type
+                                   || qualifier_type.IsSubclassOf (invocation_type))
+                                       return true;
+                       }
+       
+                       if (almost_match != null)
+                               almost_match.Add (m);
+                       return false;
+               }
+
+               bool Filter (MethodBase mb, object filter_criteria)
+               {
                        MethodAttributes ma = mb.Attributes & MethodAttributes.MemberAccessMask;
 
                        if (ma == MethodAttributes.Private)
-                               return closure_private_ok || (closure_invocation_type == m.DeclaringType) ||
-                                       IsNestedChildOf (closure_invocation_type, m.DeclaringType);
+                               return private_ok ||
+                                       IsPrivateAccessible (invocation_type, mb.DeclaringType) ||
+                                       IsNestedChildOf (invocation_type, mb.DeclaringType);
 
                        //
                        // FamAndAssem requires that we not only derivate, but we are on the
                        // same assembly.  
                        //
                        if (ma == MethodAttributes.FamANDAssem){
-                               if (closure_invocation_assembly != mb.DeclaringType.Assembly)
+                               if (invocation_assembly != mb.DeclaringType.Assembly)
                                        return false;
                        }
 
                        // Assembly and FamORAssem succeed if we're in the same assembly.
                        if ((ma == MethodAttributes.Assembly) || (ma == MethodAttributes.FamORAssem)){
-                               if (closure_invocation_assembly == mb.DeclaringType.Assembly)
+                               if (invocation_assembly == mb.DeclaringType.Assembly)
                                        return true;
                        }
 
@@ -2285,17 +2900,18 @@ public class TypeManager {
 
                        // Family and FamANDAssem require that we derive.
                        if ((ma == MethodAttributes.Family) || (ma == MethodAttributes.FamANDAssem)){
-                               if (closure_invocation_type == null)
+                               if (invocation_type == null)
                                        return false;
 
-                               if (!IsSubclassOrNestedChildOf (closure_invocation_type, mb.DeclaringType))
+                               if (!IsNestedFamilyAccessible (invocation_type, mb.DeclaringType))
                                        return false;
 
                                // Although a derived class can access protected members of its base class
                                // it cannot do so through an instance of the base class (CS1540).
-                               if (!mb.IsStatic && (closure_invocation_type != closure_qualifier_type) &&
-                                   (closure_qualifier_type != null) &&
-                                   closure_invocation_type.IsSubclassOf (closure_qualifier_type))
+                               if (!mb.IsStatic && (qualifier_type != null) &&
+                                   !IsEqualGenericInstance (invocation_type, qualifier_type) &&
+                                   TypeManager.IsFamilyAccessible (invocation_type, qualifier_type) &&
+                                   !TypeManager.IsNestedChildOf (invocation_type, qualifier_type))
                                        return false;
 
                                return true;
@@ -2305,26 +2921,27 @@ public class TypeManager {
                        return true;
                }
 
-               if (m is FieldInfo){
-                       FieldInfo fi = (FieldInfo) m;
+               bool Filter (FieldInfo fi, object filter_criteria)
+               {
                        FieldAttributes fa = fi.Attributes & FieldAttributes.FieldAccessMask;
 
                        if (fa == FieldAttributes.Private)
-                               return closure_private_ok || (closure_invocation_type == m.DeclaringType) ||
-                                       IsNestedChildOf (closure_invocation_type, m.DeclaringType);
+                               return private_ok ||
+                                       IsPrivateAccessible (invocation_type, fi.DeclaringType) ||
+                                       IsNestedChildOf (invocation_type, fi.DeclaringType);
 
                        //
                        // FamAndAssem requires that we not only derivate, but we are on the
                        // same assembly.  
                        //
                        if (fa == FieldAttributes.FamANDAssem){
-                               if (closure_invocation_assembly != fi.DeclaringType.Assembly)
+                               if (invocation_assembly != fi.DeclaringType.Assembly)
                                        return false;
                        }
 
                        // Assembly and FamORAssem succeed if we're in the same assembly.
                        if ((fa == FieldAttributes.Assembly) || (fa == FieldAttributes.FamORAssem)){
-                               if (closure_invocation_assembly == fi.DeclaringType.Assembly)
+                               if (invocation_assembly == fi.DeclaringType.Assembly)
                                        return true;
                        }
 
@@ -2334,17 +2951,18 @@ public class TypeManager {
 
                        // Family and FamANDAssem require that we derive.
                        if ((fa == FieldAttributes.Family) || (fa == FieldAttributes.FamANDAssem)){
-                               if (closure_invocation_type == null)
+                               if (invocation_type == null)
                                        return false;
 
-                               if (!IsSubclassOrNestedChildOf (closure_invocation_type, fi.DeclaringType))
+                               if (!IsNestedFamilyAccessible (invocation_type, fi.DeclaringType))
                                        return false;
 
                                // Although a derived class can access protected members of its base class
                                // it cannot do so through an instance of the base class (CS1540).
-                               if (!fi.IsStatic && (closure_invocation_type != closure_qualifier_type) &&
-                                   (closure_qualifier_type != null) &&
-                                   closure_invocation_type.IsSubclassOf (closure_qualifier_type))
+                               if (!fi.IsStatic && (qualifier_type != null) &&
+                                   !IsEqualGenericInstance (invocation_type, qualifier_type) &&
+                                   TypeManager.IsFamilyAccessible (invocation_type, qualifier_type) &&
+                                   !TypeManager.IsNestedChildOf (invocation_type, qualifier_type))
                                        return false;
 
                                return true;
@@ -2353,16 +2971,46 @@ public class TypeManager {
                        // Public.
                        return true;
                }
-
+               
                //
-               // EventInfos and PropertyInfos, return true because they lack permission
-               // informaiton, so we need to check later on the methods.
+               // This filter filters by name + whether it is ok to include private
+               // members in the search
                //
-               return true;
+               internal bool Filter (MemberInfo m, object filter_criteria)
+               {
+                       //
+                       // Hack: we know that the filter criteria will always be in the
+                       // `closure' // fields. 
+                       //
+
+                       if ((filter_criteria != null) && (m.Name != (string) filter_criteria))
+                               return false;
+
+                       if (((qualifier_type == null) || (qualifier_type == invocation_type)) &&
+                           (invocation_type != null) &&
+                           IsPrivateAccessible (m.DeclaringType, invocation_type))
+                               return true;
+
+                       //
+                       // Ugly: we need to find out the type of `m', and depending
+                       // on this, tell whether we accept or not
+                       //
+                       if (m is MethodBase)
+                               return Filter ((MethodBase) m, filter_criteria);
+
+                       if (m is FieldInfo)
+                               return Filter ((FieldInfo) m, filter_criteria);
+
+                       //
+                       // EventInfos and PropertyInfos, return true because they lack
+                       // permission information, so we need to check later on the methods.
+                       //
+                       return true;
+               }
        }
 
-       static MemberFilter FilterWithClosure_delegate = new MemberFilter (FilterWithClosure);
-       static MemberFilter FilterNone_delegate = new MemberFilter (FilterNone);
+       static Closure closure = new Closure ();
+       static MemberFilter FilterWithClosure_delegate = new MemberFilter (closure.Filter);
 
        //
        // Looks up a member called `name' in the `queried_type'.  This lookup
@@ -2389,17 +3037,19 @@ public class TypeManager {
        // is allowed to access (using the specified `qualifier_type' if given); only use
        // BindingFlags.NonPublic to bypass the permission check.
        //
+       // The 'almost_match' argument is used for reporting error CS1540.
+       //
        // Returns an array of a single element for everything but Methods/Constructors
        // that might return multiple matches.
        //
        public static MemberInfo [] MemberLookup (Type invocation_type, Type qualifier_type,
-                                                 Type queried_type,  MemberTypes mt,
-                                                 BindingFlags original_bf, string name)
+                                                 Type queried_type, MemberTypes mt,
+                                                 BindingFlags original_bf, string name, IList almost_match)
        {
                Timer.StartTimer (TimerType.MemberLookup);
 
                MemberInfo[] retval = RealMemberLookup (invocation_type, qualifier_type,
-                                                       queried_type, mt, original_bf, name);
+                                                       queried_type, mt, original_bf, name, almost_match);
 
                Timer.StopTimer (TimerType.MemberLookup);
 
@@ -2408,7 +3058,7 @@ public class TypeManager {
 
        static MemberInfo [] RealMemberLookup (Type invocation_type, Type qualifier_type,
                                               Type queried_type, MemberTypes mt,
-                                              BindingFlags original_bf, string name)
+                                              BindingFlags original_bf, string name, IList almost_match)
        {
                BindingFlags bf = original_bf;
                
@@ -2418,10 +3068,10 @@ public class TypeManager {
                bool skip_iface_check = true, used_cache = false;
                bool always_ok_flag = false;
 
-               closure_name = name;
-               closure_invocation_type = invocation_type;
-               closure_invocation_assembly = invocation_type != null ? invocation_type.Assembly : null;
-               closure_qualifier_type = qualifier_type;
+               closure.invocation_type = invocation_type;
+               closure.invocation_assembly = invocation_type != null ? invocation_type.Assembly : null;
+               closure.qualifier_type = qualifier_type;
+               closure.almost_match = almost_match;
 
                //
                // If we are a nested class, we always have access to our container
@@ -2429,7 +3079,7 @@ public class TypeManager {
                //
                if (invocation_type != null){
                        string invocation_name = invocation_type.FullName;
-                       if (invocation_name.IndexOf ('+') != -1){
+                       if ((invocation_name != null) && (invocation_name.IndexOf ('+') != -1)){
                                string container = queried_type.FullName + "+";
                                int container_length = container.Length;
 
@@ -2442,8 +3092,14 @@ public class TypeManager {
                        }
                }
                
+               // This is from the first time we find a method
+               // in most cases, we do not actually find a method in the base class
+               // so we can just ignore it, and save the arraylist allocation
+               MemberInfo [] first_members_list = null;
+               bool use_first_members_list = false;
+               
                do {
-                       MemberList list;
+                       MemberInfo [] list;
 
                        //
                        // `NonPublic' is lame, because it includes both protected and
@@ -2462,12 +3118,12 @@ public class TypeManager {
                        else
                                bf = original_bf;
 
-                       closure_private_ok = (original_bf & BindingFlags.NonPublic) != 0;
-                       closure_queried_type = current_type;
+                       closure.private_ok = (original_bf & BindingFlags.NonPublic) != 0;
 
                        Timer.StopTimer (TimerType.MemberLookup);
 
-                       list = MemberLookup_FindMembers (current_type, mt, bf, name, out used_cache);
+                       list = MemberLookup_FindMembers (
+                               current_type, mt, bf, name, out used_cache);
 
                        Timer.StartTimer (TimerType.MemberLookup);
 
@@ -2498,7 +3154,7 @@ public class TypeManager {
                                        current_type = TypeManager.object_type;
                        }
                        
-                       if (list.Count == 0)
+                       if (list.Length == 0)
                                continue;
 
                        //
@@ -2506,8 +3162,8 @@ public class TypeManager {
                        // searches, which means that our above FindMembers will
                        // return two copies of the same.
                        //
-                       if (list.Count == 1 && !(list [0] is MethodBase)){
-                               return (MemberInfo []) list;
+                       if (list.Length == 1 && !(list [0] is MethodBase)){
+                               return list;
                        }
 
                        //
@@ -2515,14 +3171,14 @@ public class TypeManager {
                        // name
                        //
                        if (list [0] is PropertyInfo)
-                               return (MemberInfo []) list;
+                               return list;
 
                        //
                        // We found an event: the cache lookup returns both the event and
                        // its private field.
                        //
                        if (list [0] is EventInfo) {
-                               if ((list.Count == 2) && (list [1] is FieldInfo))
+                               if ((list.Length == 2) && (list [1] is FieldInfo))
                                        return new MemberInfo [] { list [0] };
 
                                // Oooops
@@ -2534,10 +3190,31 @@ public class TypeManager {
                        // mode.
                        //
 
-                       method_list = CopyNewMethods (method_list, list);
-                       mt &= (MemberTypes.Method | MemberTypes.Constructor);
+                       if (first_members_list != null) {
+                               if (use_first_members_list) {
+                                       method_list = CopyNewMethods (method_list, first_members_list);
+                                       use_first_members_list = false;
+                               }
+                               
+                               method_list = CopyNewMethods (method_list, list);
+                       } else {
+                               first_members_list = list;
+                               use_first_members_list = true;
+
+                               mt &= (MemberTypes.Method | MemberTypes.Constructor);
+                       }
                } while (searching);
 
+               if (use_first_members_list) {
+                       foreach (MemberInfo mi in first_members_list) {
+                               if (! (mi is MethodBase)) {
+                                       method_list = CopyNewMethods (method_list, first_members_list);
+                                       return (MemberInfo []) method_list.ToArray (typeof (MemberInfo));
+                               }
+                       }
+                       return (MemberInfo []) first_members_list;
+               }
+
                if (method_list != null && method_list.Count > 0) {
                         return (MemberInfo []) method_list.ToArray (typeof (MemberInfo));
                 }
@@ -2565,7 +3242,7 @@ public class TypeManager {
                foreach (Type itype in ifaces){
                        MemberInfo [] x;
 
-                       x = MemberLookup (null, null, itype, mt, bf, name);
+                       x = MemberLookup (null, null, itype, mt, bf, name, null);
                        if (x != null)
                                return x;
                }
@@ -2573,85 +3250,30 @@ public class TypeManager {
                return null;
        }
 
-       //
-       // This is used to extract properties and event declarations from a type
-       //
-       static MemberInfo [] SpecialContainerLookup (Type t, bool is_static)
-       {
-               BindingFlags bf = BindingFlags.DeclaredOnly | (is_static ? BindingFlags.Static : BindingFlags.Instance);
-
-               bf |= BindingFlags.Public | BindingFlags.NonPublic;
-               
-               if (t is TypeBuilder) {
-                       DeclSpace decl = (DeclSpace) builder_to_declspace [t];
-
-                       return (MemberInfo []) decl.FindMembers (
-                               MemberTypes.Property | MemberTypes.Event,
-                               bf, FilterNone_delegate, null);
-               } else {
-                       return t.FindMembers (MemberTypes.Property | MemberTypes.Event,
-                                             bf, FilterNone_delegate, null);
-
-               }
-       }
-       
+       // Tests whether external method is really special
        public static bool IsSpecialMethod (MethodBase mb)
        {
-               Type t = mb.DeclaringType;
-               
-               MemberInfo [] matches = TypeManager.SpecialContainerLookup (t, mb.IsStatic);
-               if (matches == null)
-                       return false;
-               
-               foreach (MemberInfo mi in matches){
-                       if (mi is PropertyBuilder){
-                               Pair p = (Pair) properties [mi];
-
-                               if (p.First == mb || p.Second == mb)
-                                       return true;
-                       } else if (mi is PropertyInfo){
-                               MethodInfo [] methods = ((PropertyInfo) mi).GetAccessors (true);
+               string name = mb.Name;
+               if (name.StartsWith ("get_") || name.StartsWith ("set_"))
+                       return mb.DeclaringType.GetProperty (name.Substring (4)) != null;
                                
-                               foreach (MethodInfo m in methods){
-                                       if (m == mb)
-                                               return true;
-                               }
-                       } else if (mi is MyEventBuilder){
-                               Pair p = (Pair) events [mi];
+               if (name.StartsWith ("add_"))
+                       return mb.DeclaringType.GetEvent (name.Substring (4)) != null;
 
-                               if (p.First == mb || p.Second == mb)
-                                       return true;
-                       } else if (mi is EventInfo){
-                               EventInfo ei = ((EventInfo) mi);
-                               
-                               if (ei.GetAddMethod (true) == mb)
-                                       return true;
-                               
-                               if (ei.GetRemoveMethod (true) == mb)
-                                       return true;
-                               
-                               if (ei.GetRaiseMethod (true) == mb)
-                                       return true;
-                       }
-               }
+               if (name.StartsWith ("remove_"))
+                       return mb.DeclaringType.GetEvent (name.Substring (7)) != null;
 
-               //
-               // Now check if it is an operator method
-               //
-               string s = mb.Name;
-
-               if (s.StartsWith ("op_")){
-                       foreach (string name in Unary.oper_names){
-                               if (s == name)
+               if (name.StartsWith ("op_")){
+                       foreach (string oname in Unary.oper_names) {
+                               if (oname == name)
                                        return true;
                        }
 
-                       foreach (string name in Binary.oper_names){
-                               if (s == name)
+                       foreach (string oname in Binary.oper_names) {
+                               if (oname == name)
                                        return true;
                        }
                }
-               
                return false;
        }
                
@@ -2683,6 +3305,11 @@ public sealed class TypeHandle : IMemberContainer {
                type_hash.Add (t, handle);
                return handle;
        }
+       
+       public static void CleanUp ()
+       {
+               type_hash = null;
+       }
 
        /// <summary>
        ///   Returns the TypeHandle for TypeManager.object_type.
@@ -2718,15 +3345,17 @@ public sealed class TypeHandle : IMemberContainer {
        private static TypeHandle array_type = null;
 
        private Type type;
+       private string full_name;
        private bool is_interface;
        private MemberCache member_cache;
 
        private TypeHandle (Type type)
        {
                this.type = type;
+               full_name = type.FullName != null ? type.FullName : type.Name;
                if (type.BaseType != null)
                        BaseType = GetTypeHandle (type.BaseType);
-               this.is_interface = type.IsInterface;
+               this.is_interface = type.IsInterface || type.IsGenericParameter;
                this.member_cache = new MemberCache (this);
        }
 
@@ -2734,7 +3363,7 @@ public sealed class TypeHandle : IMemberContainer {
 
        public string Name {
                get {
-                       return type.FullName;
+                       return full_name;
                }
        }
 
@@ -2744,7 +3373,7 @@ public sealed class TypeHandle : IMemberContainer {
                }
        }
 
-       public IMemberContainer Parent {
+       public IMemberContainer ParentContainer {
                get {
                        return BaseType;
                }
@@ -2759,6 +3388,8 @@ public sealed class TypeHandle : IMemberContainer {
        public MemberList GetMembers (MemberTypes mt, BindingFlags bf)
        {
                 MemberInfo [] members;
+               if (type is GenericTypeParameterBuilder)
+                       return MemberList.Empty;
                if (mt == MemberTypes.Event)
                         members = type.GetEvents (bf | BindingFlags.DeclaredOnly);
                 else
@@ -2774,7 +3405,7 @@ public sealed class TypeHandle : IMemberContainer {
        public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
                                       MemberFilter filter, object criteria)
        {
-               return member_cache.FindMembers (mt, bf, name, filter, criteria);
+               return new MemberList (member_cache.FindMembers (mt, bf, name, filter, criteria));
        }
 
        public MemberCache MemberCache {