mcs/class/corlib/System/Type.cs

   1 //
   2 // System.Type.cs
   3 //
   4 // Author:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //
   7 // (C) Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System.Diagnostics;
  34 using System.Reflection;
  35 using System.Reflection.Emit;
  36 using System.Collections;
  37 using System.Runtime.InteropServices;
  38 using System.Runtime.CompilerServices;
  39 using System.Globalization;
  40
  41 namespace System {
  42
  43         [Serializable]
  44         [ClassInterface (ClassInterfaceType.None)]
  45         [ComVisible (true)]
  46         [ComDefaultInterface (typeof (_Type))]
  47         public abstract class Type : MemberInfo, IReflect, _Type {
  48
  49                 internal RuntimeTypeHandle _impl;
  50
  51                 public static readonly char Delimiter = '.';
  52                 public static readonly Type[] EmptyTypes = {};
  53                 public static readonly MemberFilter FilterAttribute = new MemberFilter (FilterAttribute_impl);
  54                 public static readonly MemberFilter FilterName = new MemberFilter (FilterName_impl);
  55                 public static readonly MemberFilter FilterNameIgnoreCase = new MemberFilter (FilterNameIgnoreCase_impl);
  56                 public static readonly object Missing = System.Reflection.Missing.Value;
  57
  58                 internal const BindingFlags DefaultBindingFlags =
  59                 BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance;
  60
  61                 /* implementation of the delegates for MemberFilter */
  62                 static bool FilterName_impl (MemberInfo m, object filterCriteria)
  63                 {
  64                         string name = (string) filterCriteria;
  65                         if (name == null || name.Length == 0 )
  66                                 return false; // because m.Name cannot be null or empty
  67
  68                         if (name [name.Length-1] == '*')
  69                                 return string.CompareOrdinal (name, 0, m.Name, 0, name.Length-1) == 0;
  70
  71                 return name.Equals (m.Name);
  72                 }
  73
  74                 static bool FilterNameIgnoreCase_impl (MemberInfo m, object filterCriteria)
  75                 {
  76                         string name = (string) filterCriteria;
  77                         if (name == null || name.Length == 0 )
  78                                 return false; // because m.Name cannot be null or empty
  79
  80                         if (name [name.Length-1] == '*')
  81                                 return string.Compare (name, 0, m.Name, 0, name.Length-1, StringComparison.OrdinalIgnoreCase) == 0;
  82
  83                         return string.Equals (name, m.Name, StringComparison.OrdinalIgnoreCase);
  84                 }
  85
  86                 static bool FilterAttribute_impl (MemberInfo m, object filterCriteria)
  87                 {
  88                         int flags = ((IConvertible)filterCriteria).ToInt32 (null);
  89                         if (m is MethodInfo)
  90                                 return ((int)((MethodInfo)m).Attributes & flags) != 0;
  91                         if (m is FieldInfo)
  92                                 return ((int)((FieldInfo)m).Attributes & flags) != 0;
  93                         if (m is PropertyInfo)
  94                                 return ((int)((PropertyInfo)m).Attributes & flags) != 0;
  95                         if (m is EventInfo)
  96                                 return ((int)((EventInfo)m).Attributes & flags) != 0;
  97                         return false;
  98                 }
  99
 100                 protected Type ()
 101                 {
 102                 }
 103
 104                 /// <summary>
 105                 ///   The assembly where the type is defined.
 106                 /// </summary>
 107                 public abstract Assembly Assembly {
 108                         get;
 109                 }
 110
 111                 /// <summary>
 112                 ///   Gets the fully qualified name for the type including the
 113                 ///   assembly name where the type is defined.
 114                 /// </summary>
 115                 public abstract string AssemblyQualifiedName {
 116                         get;
 117                 }
 118
 119                 /// <summary>
 120                 ///   Returns the Attributes associated with the type.
 121                 /// </summary>
 122                 public TypeAttributes Attributes {
 123                         get {
 124                                 return GetAttributeFlagsImpl ();
 125                         }
 126                 }
 127
 128                 /// <summary>
 129                 ///   Returns the basetype for this type
 130                 /// </summary>
 131                 public abstract Type BaseType {
 132                         get;
 133                 }
 134
 135                 /// <summary>
 136                 ///   Returns the class that declares the member.
 137                 /// </summary>
 138                 public override Type DeclaringType {
 139                         get {
 140                                 return null;
 141                         }
 142                 }
 143
 144                 /// <summary>
 145                 ///
 146                 /// </summary>
 147                 public static Binder DefaultBinder {
 148                         get {
 149                                 return Binder.DefaultBinder;
 150                         }
 151                 }
 152
 153                 /// <summary>
 154                 ///    The full name of the type including its namespace
 155                 /// </summary>
 156                 public abstract string FullName {
 157                         get;
 158                 }
 159
 160                 public abstract Guid GUID {
 161                         get;
 162                 }
 163
 164                 public bool HasElementType {
 165                         get {
 166                                 return HasElementTypeImpl ();
 167                         }
 168                 }
 169
 170                 public bool IsAbstract {
 171                         get {
 172                                 return (Attributes & TypeAttributes.Abstract) != 0;
 173                         }
 174                 }
 175
 176                 public bool IsAnsiClass {
 177                         get {
 178                                 return (Attributes & TypeAttributes.StringFormatMask)
 179                                 == TypeAttributes.AnsiClass;
 180                         }
 181                 }
 182
 183                 public bool IsArray {
 184                         get {
 185                                 return IsArrayImpl ();
 186                         }
 187                 }
 188
 189                 public bool IsAutoClass {
 190                         get {
 191                                 return (Attributes & TypeAttributes.StringFormatMask) == TypeAttributes.AutoClass;
 192                         }
 193                 }
 194
 195                 public bool IsAutoLayout {
 196                         get {
 197                                 return (Attributes & TypeAttributes.LayoutMask) == TypeAttributes.AutoLayout;
 198                         }
 199                 }
 200
 201                 public bool IsByRef {
 202                         get {
 203                                 return IsByRefImpl ();
 204                         }
 205                 }
 206
 207                 public bool IsClass {
 208                         get {
 209                                 if (IsInterface)
 210                                         return false;
 211
 212                                 return !IsValueType;
 213                         }
 214                 }
 215
 216                 public bool IsCOMObject {
 217                         get {
 218                                 return IsCOMObjectImpl ();
 219                         }
 220                 }
 221
 222                 public bool IsContextful {
 223                         get {
 224                                 return IsContextfulImpl ();
 225                         }
 226                 }
 227
 228                 public bool IsEnum {
 229                         get {
 230                                 return IsSubclassOf (typeof (Enum));
 231                         }
 232                 }
 233
 234                 public bool IsExplicitLayout {
 235                         get {
 236                                 return (Attributes & TypeAttributes.LayoutMask) == TypeAttributes.ExplicitLayout;
 237                         }
 238                 }
 239
 240                 public bool IsImport {
 241                         get {
 242                                 return (Attributes & TypeAttributes.Import) != 0;
 243                         }
 244                 }
 245
 246                 public bool IsInterface {
 247                         get {
 248                                 return (Attributes & TypeAttributes.ClassSemanticsMask) == TypeAttributes.Interface;
 249                         }
 250                 }
 251
 252                 public bool IsLayoutSequential {
 253                         get {
 254                                 return (Attributes & TypeAttributes.LayoutMask) == TypeAttributes.SequentialLayout;
 255                         }
 256                 }
 257
 258                 public bool IsMarshalByRef {
 259                         get {
 260                                 return IsMarshalByRefImpl ();
 261                         }
 262                 }
 263
 264                 public bool IsNestedAssembly {
 265                         get {
 266                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedAssembly;
 267                         }
 268                 }
 269
 270                 public bool IsNestedFamANDAssem {
 271                         get {
 272                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedFamANDAssem;
 273                         }
 274                 }
 275
 276                 public bool IsNestedFamily {
 277                         get {
 278                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedFamily;
 279                         }
 280                 }
 281
 282                 public bool IsNestedFamORAssem {
 283                         get {
 284                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedFamORAssem;
 285                         }
 286                 }
 287
 288                 public bool IsNestedPrivate {
 289                         get {
 290                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedPrivate;
 291                         }
 292                 }
 293
 294                 public bool IsNestedPublic {
 295                         get {
 296                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedPublic;
 297                         }
 298                 }
 299
 300                 public bool IsNotPublic {
 301                         get {
 302                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NotPublic;
 303                         }
 304                 }
 305
 306                 public bool IsPointer {
 307                         get {
 308                                 return IsPointerImpl ();
 309                         }
 310                 }
 311
 312                 public bool IsPrimitive {
 313                         get {
 314                                 return IsPrimitiveImpl ();
 315                         }
 316                 }
 317
 318                 public bool IsPublic {
 319                         get {
 320                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.Public;
 321                         }
 322                 }
 323
 324                 public bool IsSealed {
 325                         get {
 326                                 return (Attributes & TypeAttributes.Sealed) != 0;
 327                         }
 328                 }
 329
 330                 public bool IsSerializable {
 331                         get {
 332                                 if ((Attributes & TypeAttributes.Serializable) != 0)
 333                                         return true;
 334
 335                                 // Enums and delegates are always serializable
 336
 337                                 Type type = UnderlyingSystemType;
 338                                 if (type == null)
 339                                         return false;
 340
 341                                 // Fast check for system types
 342                                 if (type.IsSystemType)
 343                                         return type_is_subtype_of (type, typeof (Enum), false) || type_is_subtype_of (type, typeof (Delegate), false);
 344
 345                                 // User defined types depend on this behavior
 346                                 do {
 347                                         if ((type == typeof (Enum)) || (type == typeof (Delegate)))
 348                                                 return true;
 349
 350                                         type = type.BaseType;
 351                                 } while (type != null);
 352
 353                                 return false;
 354                         }
 355                 }
 356
 357                 public bool IsSpecialName {
 358                         get {
 359                                 return (Attributes & TypeAttributes.SpecialName) != 0;
 360                         }
 361                 }
 362
 363                 public bool IsUnicodeClass {
 364                         get {
 365                                 return (Attributes & TypeAttributes.StringFormatMask) == TypeAttributes.UnicodeClass;
 366                         }
 367                 }
 368
 369                 public bool IsValueType {
 370                         get {
 371                                 return IsValueTypeImpl ();
 372                         }
 373                 }
 374
 375                 public override MemberTypes MemberType {
 376                         get {return MemberTypes.TypeInfo;}
 377                 }
 378
 379                 override
 380                 public abstract Module Module {get;}
 381
 382                 public abstract string Namespace {get;}
 383
 384                 public override Type ReflectedType {
 385                         get {
 386                                 return null;
 387                         }
 388                 }
 389
 390                 public virtual RuntimeTypeHandle TypeHandle {
 391                         get { throw new ArgumentException ("Derived class must provide implementation."); }
 392                 }
 393
 394                 [ComVisible (true)]
 395                 public ConstructorInfo TypeInitializer {
 396                         get {
 397                                 return GetConstructorImpl (
 398                                         BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static,
 399                                         null,
 400                                         CallingConventions.Any,
 401                                         EmptyTypes,
 402                                         null);
 403                         }
 404                 }
 405
 406                 /*
 407                  * This has NOTHING to do with getting the base type of an enum. Use
 408                  * Enum.GetUnderlyingType () for that.
 409                  */
 410                 public abstract Type UnderlyingSystemType {get;}
 411
 412                 public override bool Equals (object o)
 413                 {
 414                         if (o == this)
 415                                 return true;
 416                         Type me = UnderlyingSystemType;
 417                         if (me == null)
 418                                 return false;
 419                         return me.EqualsInternal (o as Type);
 420                 }
 421
 422                 public bool Equals (Type o) {
 423                         if (o == this)
 424                                 return true;
 425                         if (o == null)
 426                                 return false;
 427                         Type me = UnderlyingSystemType;
 428                         if (me == null)
 429                                 return false;
 430                         return me.EqualsInternal (o.UnderlyingSystemType);
 431                 }
 432
 433 #if NET_4_0
 434                 [MonoTODO ("Implement it properly once 4.0 impl details are known.")]
 435                 public static bool operator == (Type left, Type right)
 436                 {
 437                         return Object.ReferenceEquals (left, right);
 438                 }
 439
 440                 [MonoTODO ("Implement it properly once 4.0 impl details are known.")]
 441                 public static bool operator != (Type left, Type right)
 442                 {
 443                         return !Object.ReferenceEquals (left, right);
 444                 }
 445 #endif
 446
 447                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 448                 internal extern bool EqualsInternal (Type type);
 449
 450                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 451                 private static extern Type internal_from_handle (IntPtr handle);
 452
 453                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 454                 private static extern Type internal_from_name (string name, bool throwOnError, bool ignoreCase);
 455
 456                 public static Type GetType(string typeName)
 457                 {
 458                         if (typeName == null)
 459                                 throw new ArgumentNullException ("TypeName");
 460
 461                         return internal_from_name (typeName, false, false);
 462                 }
 463
 464                 public static Type GetType(string typeName, bool throwOnError)
 465                 {
 466                         if (typeName == null)
 467                                 throw new ArgumentNullException ("TypeName");
 468
 469                         Type type = internal_from_name (typeName, throwOnError, false);
 470                         if (throwOnError && type == null)
 471                                 throw new TypeLoadException ("Error loading '" + typeName + "'");
 472
 473                         return type;
 474                 }
 475
 476                 public static Type GetType(string typeName, bool throwOnError, bool ignoreCase)
 477                 {
 478                         if (typeName == null)
 479                                 throw new ArgumentNullException ("TypeName");
 480
 481                         Type t = internal_from_name (typeName, throwOnError, ignoreCase);
 482                         if (throwOnError && t == null)
 483                                 throw new TypeLoadException ("Error loading '" + typeName + "'");
 484
 485                         return t;
 486                 }
 487
 488                 public static Type[] GetTypeArray (object[] args) {
 489                         if (args == null)
 490                                 throw new ArgumentNullException ("args");
 491
 492                         Type[] ret;
 493                         ret = new Type [args.Length];
 494                         for (int i = 0; i < args.Length; ++i)
 495                                 ret [i] = args[i].GetType ();
 496                         return ret;
 497                 }
 498
 499                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 500                 internal extern static TypeCode GetTypeCodeInternal (Type type);
 501
 502                 public static TypeCode GetTypeCode (Type type) {
 503                         if (type is MonoType)
 504                                 return GetTypeCodeInternal (type);
 505                         if (type == null)
 506                                 /* MS.NET returns this */
 507                                 return TypeCode.Empty;
 508
 509                         type = type.UnderlyingSystemType;
 510
 511                         if (!type.IsSystemType)
 512                                 return TypeCode.Object;
 513                         else
 514                                 return GetTypeCodeInternal (type);
 515                 }
 516
 517                 [MonoTODO("This operation is currently not supported by Mono")]
 518                 public static Type GetTypeFromCLSID (Guid clsid)
 519                 {
 520                         throw new NotImplementedException ();
 521                 }
 522
 523                 [MonoTODO("This operation is currently not supported by Mono")]
 524                 public static Type GetTypeFromCLSID (Guid clsid, bool throwOnError)
 525                 {
 526                         throw new NotImplementedException ();
 527                 }
 528
 529                 [MonoTODO("This operation is currently not supported by Mono")]
 530                 public static Type GetTypeFromCLSID (Guid clsid, string server)
 531                 {
 532                         throw new NotImplementedException ();
 533                 }
 534
 535                 [MonoTODO("This operation is currently not supported by Mono")]
 536                 public static Type GetTypeFromCLSID (Guid clsid, string server, bool throwOnError)
 537                 {
 538                         throw new NotImplementedException ();
 539                 }
 540
 541                 public static Type GetTypeFromHandle (RuntimeTypeHandle handle)
 542                 {
 543                         if (handle.Value == IntPtr.Zero)
 544                                 // This is not consistent with the other GetXXXFromHandle methods, but
 545                                 // MS.NET seems to do this
 546                                 return null;
 547
 548                         return internal_from_handle (handle.Value);
 549                 }
 550
 551                 [MonoTODO("Mono does not support COM")]
 552                 public static Type GetTypeFromProgID (string progID)
 553                 {
 554                         throw new NotImplementedException ();
 555                 }
 556
 557                 [MonoTODO("Mono does not support COM")]
 558                 public static Type GetTypeFromProgID (string progID, bool throwOnError)
 559                 {
 560                         throw new NotImplementedException ();
 561                 }
 562
 563                 [MonoTODO("Mono does not support COM")]
 564                 public static Type GetTypeFromProgID (string progID, string server)
 565                 {
 566                         throw new NotImplementedException ();
 567                 }
 568
 569                 [MonoTODO("Mono does not support COM")]
 570                 public static Type GetTypeFromProgID (string progID, string server, bool throwOnError)
 571                 {
 572                         throw new NotImplementedException ();
 573                 }
 574
 575                 public static RuntimeTypeHandle GetTypeHandle (object o)
 576                 {
 577                         if (o == null)
 578                                 throw new ArgumentNullException ();
 579
 580                         return o.GetType().TypeHandle;
 581                 }
 582
 583                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 584                 internal static extern bool type_is_subtype_of (Type a, Type b, bool check_interfaces);
 585
 586                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 587                 internal static extern bool type_is_assignable_from (Type a, Type b);
 588
 589                 public new Type GetType ()
 590                 {
 591                         return base.GetType ();
 592                 }
 593
 594                 [ComVisible (true)]
 595                 public virtual bool IsSubclassOf (Type c)
 596                 {
 597                         if (c == null || c == this)
 598                                 return false;
 599
 600                         // Fast check for system types
 601                         if (IsSystemType)
 602                                 return c.IsSystemType && type_is_subtype_of (this, c, false);
 603
 604                         // User defined types depend on this behavior
 605                         for (Type type = BaseType; type != null; type = type.BaseType)
 606                                 if (type == c)
 607                                         return true;
 608
 609                         return false;
 610                 }
 611
 612                 public virtual Type[] FindInterfaces (TypeFilter filter, object filterCriteria)
 613                 {
 614                         if (filter == null)
 615                                 throw new ArgumentNullException ("filter");
 616
 617                         ArrayList ifaces = new ArrayList ();
 618                         foreach (Type iface in GetInterfaces ()) {
 619                                 if (filter (iface, filterCriteria))
 620                                         ifaces.Add (iface);
 621                         }
 622
 623                         return (Type []) ifaces.ToArray (typeof (Type));
 624                 }
 625
 626                 public Type GetInterface (string name) {
 627                         return GetInterface (name, false);
 628                 }
 629
 630                 public abstract Type GetInterface (string name, bool ignoreCase);
 631
 632                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 633                 internal static extern void GetInterfaceMapData (Type t, Type iface, out MethodInfo[] targets, out MethodInfo[] methods);
 634
 635                 [ComVisible (true)]
 636                 public virtual InterfaceMapping GetInterfaceMap (Type interfaceType) {
 637                         if (!IsSystemType)
 638                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
 639                         if (!interfaceType.IsSystemType)
 640                                 throw new ArgumentException ("interfaceType", "Type is an user type");
 641                         InterfaceMapping res;
 642                         if (interfaceType == null)
 643                                 throw new ArgumentNullException ("interfaceType");
 644                         if (!interfaceType.IsInterface)
 645                                 throw new ArgumentException (Locale.GetText ("Argument must be an interface."), "interfaceType");
 646                         if (IsInterface)
 647                                 throw new ArgumentException ("'this' type cannot be an interface itself");
 648                         res.TargetType = this;
 649                         res.InterfaceType = interfaceType;
 650                         GetInterfaceMapData (this, interfaceType, out res.TargetMethods, out res.InterfaceMethods);
 651                         if (res.TargetMethods == null)
 652                                 throw new ArgumentException (Locale.GetText ("Interface not found"), "interfaceType");
 653
 654                         return res;
 655                 }
 656
 657                 public abstract Type[] GetInterfaces ();
 658
 659                 public virtual bool IsAssignableFrom (Type c)
 660                 {
 661                         if (c == null)
 662                                 return false;
 663
 664                         if (Equals (c))
 665                                 return true;
 666
 667                         if (c is TypeBuilder)
 668                                 return ((TypeBuilder)c).IsAssignableTo (this);
 669
 670                         /* Handle user defined type classes */
 671                         if (!IsSystemType) {
 672                                 Type systemType = UnderlyingSystemType;
 673                                 if (!systemType.IsSystemType)
 674                                         return false;
 675
 676                                 Type other = c.UnderlyingSystemType;
 677                                 if (!other.IsSystemType)
 678                                         return false;
 679
 680                                 return systemType.IsAssignableFrom (other);
 681                         }
 682
 683                         if (!c.IsSystemType) {
 684                                 Type underlyingType = c.UnderlyingSystemType;
 685                                 if (!underlyingType.IsSystemType)
 686                                         return false;
 687                                 return IsAssignableFrom (underlyingType);
 688                         }
 689
 690                         return type_is_assignable_from (this, c);
 691                 }
 692
 693                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 694                 extern static bool IsInstanceOfType (Type type, object o);
 695
 696                 public virtual bool IsInstanceOfType (object o)
 697                 {
 698                         Type type = UnderlyingSystemType;
 699                         if (!type.IsSystemType)
 700                                 return false;
 701                         return IsInstanceOfType (type, o);
 702                 }
 703
 704                 public virtual int GetArrayRank ()
 705                 {
 706                         throw new NotSupportedException ();     // according to MSDN
 707                 }
 708
 709                 public abstract Type GetElementType ();
 710
 711                 public EventInfo GetEvent (string name)
 712                 {
 713                         return GetEvent (name, DefaultBindingFlags);
 714                 }
 715
 716                 public abstract EventInfo GetEvent (string name, BindingFlags bindingAttr);
 717
 718                 public virtual EventInfo[] GetEvents ()
 719                 {
 720                         return GetEvents (DefaultBindingFlags);
 721                 }
 722
 723                 public abstract EventInfo[] GetEvents (BindingFlags bindingAttr);
 724
 725                 public FieldInfo GetField( string name)
 726                 {
 727                         return GetField (name, DefaultBindingFlags);
 728                 }
 729
 730                 public abstract FieldInfo GetField( string name, BindingFlags bindingAttr);
 731
 732                 public FieldInfo[] GetFields ()
 733                 {
 734                         return GetFields (DefaultBindingFlags);
 735                 }
 736
 737                 public abstract FieldInfo[] GetFields (BindingFlags bindingAttr);
 738
 739                 public override int GetHashCode()
 740                 {
 741                         Type t = UnderlyingSystemType;
 742                         if (t != null && t != this)
 743                                 return t.GetHashCode ();
 744                         return (int)_impl.Value;
 745                 }
 746
 747                 public MemberInfo[] GetMember (string name)
 748                 {
 749                         return GetMember (name, MemberTypes.All, DefaultBindingFlags);
 750                 }
 751
 752                 public virtual MemberInfo[] GetMember (string name, BindingFlags bindingAttr)
 753                 {
 754                         return GetMember (name, MemberTypes.All, bindingAttr);
 755                 }
 756
 757                 public virtual MemberInfo[] GetMember (string name, MemberTypes type, BindingFlags bindingAttr)
 758                 {
 759                         if (name == null)
 760                                 throw new ArgumentNullException ("name");
 761                         if ((bindingAttr & BindingFlags.IgnoreCase) != 0)
 762                                 return FindMembers (type, bindingAttr, FilterNameIgnoreCase, name);
 763                         else
 764                                 return FindMembers (type, bindingAttr, FilterName, name);
 765                 }
 766
 767                 public MemberInfo[] GetMembers ()
 768                 {
 769                         return GetMembers (DefaultBindingFlags);
 770                 }
 771
 772                 public abstract MemberInfo[] GetMembers (BindingFlags bindingAttr);
 773
 774                 public MethodInfo GetMethod (string name)
 775                 {
 776                         if (name == null)
 777                                 throw new ArgumentNullException ("name");
 778                         return GetMethodImpl (name, DefaultBindingFlags, null, CallingConventions.Any, null, null);
 779                 }
 780
 781                 public MethodInfo GetMethod (string name, BindingFlags bindingAttr)
 782                 {
 783                         if (name == null)
 784                                 throw new ArgumentNullException ("name");
 785
 786                         return GetMethodImpl (name, bindingAttr, null, CallingConventions.Any, null, null);
 787                 }
 788
 789                 public MethodInfo GetMethod (string name, Type[] types)
 790                 {
 791                         return GetMethod (name, DefaultBindingFlags, null, CallingConventions.Any, types, null);
 792                 }
 793
 794                 public MethodInfo GetMethod (string name, Type[] types, ParameterModifier[] modifiers)
 795                 {
 796                         return GetMethod (name, DefaultBindingFlags, null, CallingConventions.Any, types, modifiers);
 797                 }
 798
 799                 public MethodInfo GetMethod (string name, BindingFlags bindingAttr, Binder binder,
 800                                              Type[] types, ParameterModifier[] modifiers)
 801                 {
 802                         return GetMethod (name, bindingAttr, binder, CallingConventions.Any, types, modifiers);
 803                 }
 804
 805                 public MethodInfo GetMethod (string name, BindingFlags bindingAttr, Binder binder,
 806                                              CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers)
 807                 {
 808                         if (name == null)
 809                                 throw new ArgumentNullException ("name");
 810                         if (types == null)
 811                                 throw new ArgumentNullException ("types");
 812
 813                         for (int i = 0; i < types.Length; i++)
 814                                 if (types[i] == null)
 815                                         throw new ArgumentNullException ("types");
 816
 817                         return GetMethodImpl (name, bindingAttr, binder, callConvention, types, modifiers);
 818                 }
 819
 820                 protected abstract MethodInfo GetMethodImpl (string name, BindingFlags bindingAttr, Binder binder,
 821                                                              CallingConventions callConvention, Type[] types,
 822                                                              ParameterModifier[] modifiers);
 823
 824                 internal MethodInfo GetMethodImplInternal (string name, BindingFlags bindingAttr, Binder binder,
 825                                                                                                                         CallingConventions callConvention, Type[] types,
 826                                                                                                                         ParameterModifier[] modifiers)
 827                 {
 828                         return GetMethodImpl (name, bindingAttr, binder, callConvention, types, modifiers);
 829                 }
 830
 831                 internal virtual MethodInfo GetMethod (MethodInfo fromNoninstanciated)
 832                 {
 833                         throw new System.InvalidOperationException ("can only be called in generic type");
 834                 }
 835
 836                 internal virtual ConstructorInfo GetConstructor (ConstructorInfo fromNoninstanciated)
 837                 {
 838                         throw new System.InvalidOperationException ("can only be called in generic type");
 839                 }
 840
 841                 internal virtual FieldInfo GetField (FieldInfo fromNoninstanciated)
 842                 {
 843                         throw new System.InvalidOperationException ("can only be called in generic type");
 844                 }
 845
 846
 847                 public MethodInfo[] GetMethods ()
 848                 {
 849                         return GetMethods (DefaultBindingFlags);
 850                 }
 851
 852                 public abstract MethodInfo[] GetMethods (BindingFlags bindingAttr);
 853
 854                 public Type GetNestedType (string name)
 855                 {
 856                         return GetNestedType (name, DefaultBindingFlags);
 857                 }
 858
 859                 public abstract Type GetNestedType (string name, BindingFlags bindingAttr);
 860
 861                 public Type[] GetNestedTypes ()
 862                 {
 863                         return GetNestedTypes (DefaultBindingFlags);
 864                 }
 865
 866                 public abstract Type[] GetNestedTypes (BindingFlags bindingAttr);
 867
 868
 869                 public PropertyInfo[] GetProperties ()
 870                 {
 871                         return GetProperties (DefaultBindingFlags);
 872                 }
 873
 874                 public abstract PropertyInfo[] GetProperties (BindingFlags bindingAttr);
 875
 876
 877                 public PropertyInfo GetProperty (string name)
 878                 {
 879                         if (name == null)
 880                                 throw new ArgumentNullException ("name");
 881
 882                         return GetPropertyImpl (name, DefaultBindingFlags, null, null, null, null);
 883                 }
 884
 885                 public PropertyInfo GetProperty (string name, BindingFlags bindingAttr)
 886                 {
 887                         if (name == null)
 888                                 throw new ArgumentNullException ("name");
 889                         return GetPropertyImpl (name, bindingAttr, null, null, null, null);
 890                 }
 891
 892                 public PropertyInfo GetProperty (string name, Type returnType)
 893                 {
 894                         if (name == null)
 895                                 throw new ArgumentNullException ("name");
 896                         return GetPropertyImpl (name, DefaultBindingFlags, null, returnType, null, null);
 897                 }
 898
 899                 public PropertyInfo GetProperty (string name, Type[] types)
 900                 {
 901                         return GetProperty (name, DefaultBindingFlags, null, null, types, null);
 902                 }
 903
 904                 public PropertyInfo GetProperty (string name, Type returnType, Type[] types)
 905                 {
 906                         return GetProperty (name, DefaultBindingFlags, null, returnType, types, null);
 907                 }
 908
 909                 public PropertyInfo GetProperty( string name, Type returnType, Type[] types, ParameterModifier[] modifiers)
 910                 {
 911                         return GetProperty (name, DefaultBindingFlags, null, returnType, types, modifiers);
 912                 }
 913
 914                 public PropertyInfo GetProperty (string name, BindingFlags bindingAttr, Binder binder, Type returnType,
 915                                                  Type[] types, ParameterModifier[] modifiers)
 916                 {
 917                         if (name == null)
 918                                 throw new ArgumentNullException ("name");
 919                         if (types == null)
 920                                 throw new ArgumentNullException ("types");
 921
 922                         foreach (Type t in types) {
 923                                 if (t == null)
 924                                         throw new ArgumentNullException ("types");
 925                         }
 926
 927                         return GetPropertyImpl (name, bindingAttr, binder, returnType, types, modifiers);
 928                 }
 929
 930                 protected abstract PropertyInfo GetPropertyImpl (string name, BindingFlags bindingAttr, Binder binder,
 931                                                                  Type returnType, Type[] types, ParameterModifier[] modifiers);
 932
 933                 internal PropertyInfo GetPropertyImplInternal (string name, BindingFlags bindingAttr, Binder binder,
 934                                                                                                            Type returnType, Type[] types, ParameterModifier[] modifiers)
 935                 {
 936                         return GetPropertyImpl (name, bindingAttr, binder, returnType, types, modifiers);
 937                 }
 938
 939                 protected abstract ConstructorInfo GetConstructorImpl (BindingFlags bindingAttr,
 940                                                                        Binder binder,
 941                                                                        CallingConventions callConvention,
 942                                                                        Type[] types,
 943                                                                        ParameterModifier[] modifiers);
 944
 945                 protected abstract TypeAttributes GetAttributeFlagsImpl ();
 946                 protected abstract bool HasElementTypeImpl ();
 947                 protected abstract bool IsArrayImpl ();
 948                 protected abstract bool IsByRefImpl ();
 949                 protected abstract bool IsCOMObjectImpl ();
 950                 protected abstract bool IsPointerImpl ();
 951                 protected abstract bool IsPrimitiveImpl ();
 952
 953                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 954                 internal static extern bool IsArrayImpl (Type type);
 955
 956                 protected virtual bool IsValueTypeImpl ()
 957                 {
 958                         if (this == typeof (ValueType) || this == typeof (Enum))
 959                                 return false;
 960
 961                         return IsSubclassOf (typeof (ValueType));
 962                 }
 963
 964                 protected virtual bool IsContextfulImpl ()
 965                 {
 966                         return typeof (ContextBoundObject).IsAssignableFrom (this);
 967                 }
 968
 969                 protected virtual bool IsMarshalByRefImpl ()
 970                 {
 971                         return typeof (MarshalByRefObject).IsAssignableFrom (this);
 972                 }
 973
 974                 [ComVisible (true)]
 975                 public ConstructorInfo GetConstructor (Type[] types)
 976                 {
 977                         return GetConstructor (BindingFlags.Public|BindingFlags.Instance, null, CallingConventions.Any, types, null);
 978                 }
 979
 980                 [ComVisible (true)]
 981                 public ConstructorInfo GetConstructor (BindingFlags bindingAttr, Binder binder,
 982                                                        Type[] types, ParameterModifier[] modifiers)
 983                 {
 984                         return GetConstructor (bindingAttr, binder, CallingConventions.Any, types, modifiers);
 985                 }
 986
 987                 [ComVisible (true)]
 988                 public ConstructorInfo GetConstructor (BindingFlags bindingAttr, Binder binder,
 989                                                        CallingConventions callConvention,
 990                                                        Type[] types, ParameterModifier[] modifiers)
 991                 {
 992                         if (types == null)
 993                                 throw new ArgumentNullException ("types");
 994
 995                         foreach (Type t in types) {
 996                                 if (t == null)
 997                                         throw new ArgumentNullException ("types");
 998                         }
 999
1000                         return GetConstructorImpl (bindingAttr, binder, callConvention, types, modifiers);
1001                 }
1002
1003                 [ComVisible (true)]
1004                 public ConstructorInfo[] GetConstructors ()
1005                 {
1006                         return GetConstructors (BindingFlags.Public | BindingFlags.Instance);
1007                 }
1008
1009                 [ComVisible (true)]
1010                 public abstract ConstructorInfo[] GetConstructors (BindingFlags bindingAttr);
1011
1012                 public virtual MemberInfo[] GetDefaultMembers ()
1013                 {
1014                         object [] att = GetCustomAttributes (typeof (DefaultMemberAttribute), true);
1015                         if (att.Length == 0)
1016                                 return new MemberInfo [0];
1017
1018                         MemberInfo [] member = GetMember (((DefaultMemberAttribute) att [0]).MemberName);
1019                         return (member != null) ? member : new MemberInfo [0];
1020                 }
1021
1022                 public virtual MemberInfo[] FindMembers (MemberTypes memberType, BindingFlags bindingAttr,
1023                                                          MemberFilter filter, object filterCriteria)
1024                 {
1025                         MemberInfo[] result;
1026                         ArrayList l = new ArrayList ();
1027
1028                         // Console.WriteLine ("FindMembers for {0} (Type: {1}): {2}",
1029                         // this.FullName, this.GetType().FullName, this.obj_address());
1030                         if ((memberType & MemberTypes.Method) != 0) {
1031                                 MethodInfo[] c = GetMethods (bindingAttr);
1032                                 if (filter != null) {
1033                                         foreach (MemberInfo m in c) {
1034                                                 if (filter (m, filterCriteria))
1035                                                         l.Add (m);
1036                                         }
1037                                 } else {
1038                                         l.AddRange (c);
1039                                 }
1040                         }
1041                         if ((memberType & MemberTypes.Constructor) != 0) {
1042                                 ConstructorInfo[] c = GetConstructors (bindingAttr);
1043                                 if (filter != null) {
1044                                         foreach (MemberInfo m in c) {
1045                                                 if (filter (m, filterCriteria))
1046                                                         l.Add (m);
1047                                         }
1048                                 } else {
1049                                         l.AddRange (c);
1050                                 }
1051                         }
1052                         if ((memberType & MemberTypes.Property) != 0) {
1053                                 PropertyInfo[] c;
1054                                 int count = l.Count;
1055                                 Type ptype;
1056                                 if (filter != null) {
1057                                         ptype = this;
1058                                         while ((l.Count == count) && (ptype != null)) {
1059                                                 c = ptype.GetProperties (bindingAttr);
1060                                                 foreach (MemberInfo m in c) {
1061                                                         if (filter (m, filterCriteria))
1062                                                                 l.Add (m);
1063                                                 }
1064                                                 ptype = ptype.BaseType;
1065                                         }
1066                                 } else {
1067                                         c = GetProperties (bindingAttr);
1068                                         l.AddRange (c);
1069                                 }
1070                         }
1071                         if ((memberType & MemberTypes.Event) != 0) {
1072                                 EventInfo[] c = GetEvents (bindingAttr);
1073                                 if (filter != null) {
1074                                         foreach (MemberInfo m in c) {
1075                                                 if (filter (m, filterCriteria))
1076                                                         l.Add (m);
1077                                         }
1078                                 } else {
1079                                         l.AddRange (c);
1080                                 }
1081                         }
1082                         if ((memberType & MemberTypes.Field) != 0) {
1083                                 FieldInfo[] c = GetFields (bindingAttr);
1084                                 if (filter != null) {
1085                                         foreach (MemberInfo m in c) {
1086                                                 if (filter (m, filterCriteria))
1087                                                         l.Add (m);
1088                                         }
1089                                 } else {
1090                                         l.AddRange (c);
1091                                 }
1092                         }
1093                         if ((memberType & MemberTypes.NestedType) != 0) {
1094                                 Type[] c = GetNestedTypes (bindingAttr);
1095                                 if (filter != null) {
1096                                         foreach (MemberInfo m in c) {
1097                                                 if (filter (m, filterCriteria)) {
1098                                                         l.Add (m);
1099                                                 }
1100                                         }
1101                                 } else {
1102                                         l.AddRange (c);
1103                                 }
1104                         }
1105
1106                         switch (memberType) {
1107                         case MemberTypes.Constructor :
1108                                 result = new ConstructorInfo [l.Count];
1109                                 break;
1110                         case MemberTypes.Event :
1111                                 result = new EventInfo [l.Count];
1112                                 break;
1113                         case MemberTypes.Field :
1114                                 result = new FieldInfo [l.Count];
1115                                 break;
1116                         case MemberTypes.Method :
1117                                 result = new MethodInfo [l.Count];
1118                                 break;
1119                         case MemberTypes.NestedType :
1120                         case MemberTypes.TypeInfo :
1121                                 result = new Type [l.Count];
1122                                 break;
1123                         case MemberTypes.Property :
1124                                 result = new PropertyInfo [l.Count];
1125                                 break;
1126                         default :
1127                                 result = new MemberInfo [l.Count];
1128                                 break;
1129                         }
1130                         l.CopyTo (result);
1131                         return result;
1132                 }
1133
1134                 [DebuggerHidden]
1135                 [DebuggerStepThrough]
1136                 public object InvokeMember (string name, BindingFlags invokeAttr, Binder binder, object target, object[] args)
1137                 {
1138                         return InvokeMember (name, invokeAttr, binder, target, args, null, null, null);
1139                 }
1140
1141                 [DebuggerHidden]
1142                 [DebuggerStepThrough]
1143                 public object InvokeMember (string name, BindingFlags invokeAttr, Binder binder,
1144                                             object target, object[] args, CultureInfo culture)
1145                 {
1146                         return InvokeMember (name, invokeAttr, binder, target, args, null, culture, null);
1147                 }
1148
1149                 public abstract object InvokeMember (string name, BindingFlags invokeAttr,
1150                                                      Binder binder, object target, object[] args,
1151                                                      ParameterModifier[] modifiers,
1152                                                      CultureInfo culture, string[] namedParameters);
1153
1154                 public override string ToString()
1155                 {
1156                         return FullName;
1157                 }
1158
1159                 internal virtual bool IsCompilerContext {
1160                         get {
1161                                 AssemblyBuilder builder = Assembly as AssemblyBuilder;
1162                                 return builder != null && builder.IsCompilerContext;
1163                         }
1164                 }
1165
1166                 internal bool IsSystemType {
1167                         get {
1168                                 return _impl.Value != IntPtr.Zero;
1169                         }
1170                 }
1171
1172                 public virtual Type[] GetGenericArguments ()
1173                 {
1174                         throw new NotSupportedException ();
1175                 }
1176
1177                 public virtual bool ContainsGenericParameters {
1178                         get { return false; }
1179                 }
1180
1181                 public virtual extern bool IsGenericTypeDefinition {
1182                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1183                         get;
1184                 }
1185
1186                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1187                 internal extern Type GetGenericTypeDefinition_impl ();
1188
1189                 public virtual Type GetGenericTypeDefinition ()
1190                 {
1191                         throw new NotSupportedException ("Derived classes must provide an implementation.");
1192                 }
1193
1194                 public virtual extern bool IsGenericType {
1195                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1196                         get;
1197                 }
1198
1199                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1200                 static extern Type MakeGenericType (Type gt, Type [] types);
1201
1202                 static AssemblyBuilder PeelAssemblyBuilder (Type type)
1203                 {
1204                         if (type.Assembly is AssemblyBuilder)
1205                                 return (AssemblyBuilder)type.Assembly;
1206
1207                         if (type.HasElementType)
1208                                 return PeelAssemblyBuilder (type.GetElementType ());
1209
1210                         if (!type.IsGenericType || type.IsGenericParameter || type.IsGenericTypeDefinition)
1211                                 return null;
1212
1213                         foreach (Type arg in type.GetGenericArguments ()) {
1214                                 AssemblyBuilder ab = PeelAssemblyBuilder (arg);
1215                                 if (ab != null)
1216                                         return ab;
1217                         }
1218                         return null;
1219                 }
1220
1221                 public virtual Type MakeGenericType (params Type[] typeArguments)
1222                 {
1223                         if (IsUserType)
1224                                 throw new NotSupportedException ();
1225                         if (!IsGenericTypeDefinition)
1226                                 throw new InvalidOperationException ("not a generic type definition");
1227                         if (typeArguments == null)
1228                                 throw new ArgumentNullException ("typeArguments");
1229                         if (GetGenericArguments().Length != typeArguments.Length)
1230                                 throw new ArgumentException (String.Format ("The type or method has {0} generic parameter(s) but {1} generic argument(s) where provided. A generic argument must be provided for each generic parameter.", GetGenericArguments ().Length, typeArguments.Length), "typeArguments");
1231
1232                         bool hasUserType = false;
1233                         AssemblyBuilder compilerContext = null;
1234
1235                         Type[] systemTypes = new Type[typeArguments.Length];
1236                         for (int i = 0; i < typeArguments.Length; ++i) {
1237                                 Type t = typeArguments [i];
1238                                 if (t == null)
1239                                         throw new ArgumentNullException ("typeArguments");
1240
1241                                 if (!(t is MonoType))
1242                                         hasUserType = true;
1243                                 if (t.IsCompilerContext)
1244                                         compilerContext = PeelAssemblyBuilder (t);
1245                                 systemTypes [i] = t;
1246                         }
1247
1248                         if (hasUserType) {
1249                                 if (compilerContext != null)
1250                                         return compilerContext.MakeGenericType (this, typeArguments);
1251                                 return new MonoGenericClass (this, typeArguments);
1252                         }
1253
1254                         Type res = MakeGenericType (this, systemTypes);
1255                         if (res == null)
1256                                 throw new TypeLoadException ();
1257                         return res;
1258                 }
1259
1260                 public virtual bool IsGenericParameter {
1261                         get {
1262                                 return false;
1263                         }
1264                 }
1265
1266                 public bool IsNested {
1267                         get {
1268                                 return DeclaringType != null;
1269                         }
1270                 }
1271
1272                 public bool IsVisible {
1273                         get {
1274                                 if (IsNestedPublic)
1275                                         return DeclaringType.IsVisible;
1276
1277                                 return IsPublic;
1278                         }
1279                 }
1280
1281                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1282                 extern int GetGenericParameterPosition ();
1283
1284                 public virtual int GenericParameterPosition {
1285                         get {
1286                                 int res = GetGenericParameterPosition ();
1287                                 if (res < 0)
1288                                         throw new InvalidOperationException ();
1289                                 return res;
1290                         }
1291                 }
1292
1293                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1294                 extern GenericParameterAttributes GetGenericParameterAttributes ();
1295
1296                 public virtual GenericParameterAttributes GenericParameterAttributes {
1297                         get {
1298                                 if (!IsSystemType)
1299                                         throw new NotSupportedException ("Derived classes must provide an implementation.");
1300
1301                                 if (!IsGenericParameter)
1302                                         throw new InvalidOperationException ();
1303
1304                                 return GetGenericParameterAttributes ();
1305                         }
1306                 }
1307
1308                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1309                 extern Type[] GetGenericParameterConstraints_impl ();
1310
1311                 public virtual Type[] GetGenericParameterConstraints ()
1312                 {
1313                         if (!IsSystemType)
1314                                 throw new InvalidOperationException ();
1315
1316                         if (!IsGenericParameter)
1317                                 throw new InvalidOperationException ();
1318
1319                         return GetGenericParameterConstraints_impl ();
1320                 }
1321
1322                 public virtual MethodBase DeclaringMethod {
1323                         get {
1324                                 return null;
1325                         }
1326                 }
1327
1328                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1329                 extern Type make_array_type (int rank);
1330
1331                 public virtual Type MakeArrayType ()
1332                 {
1333                         if (!IsSystemType)
1334                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
1335                         return make_array_type (0);
1336                 }
1337
1338                 public virtual Type MakeArrayType (int rank)
1339                 {
1340                         if (!IsSystemType)
1341                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
1342                         if (rank < 1 || rank > 255)
1343                                 throw new IndexOutOfRangeException ();
1344                         return make_array_type (rank);
1345                 }
1346
1347                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1348                 extern Type make_byref_type ();
1349
1350                 public virtual Type MakeByRefType ()
1351                 {
1352                         if (!IsSystemType)
1353                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
1354                         if (IsByRef)
1355                                 throw new TypeLoadException ("Can not call MakeByRefType on a ByRef type");
1356                         return make_byref_type ();
1357                 }
1358
1359                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1360                 static extern Type MakePointerType (Type type);
1361
1362                 public virtual Type MakePointerType ()
1363                 {
1364                         if (!IsSystemType)
1365                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
1366                         return MakePointerType (this);
1367                 }
1368
1369                 public static Type ReflectionOnlyGetType (string typeName,
1370                                                           bool throwIfNotFound,
1371                                                           bool ignoreCase)
1372                 {
1373                         if (typeName == null)
1374                                 throw new ArgumentNullException ("typeName");
1375                         int idx = typeName.IndexOf (',');
1376                         if (idx < 0 || idx == 0 || idx == typeName.Length - 1)
1377                                 throw new ArgumentException ("Assembly qualifed type name is required", "typeName");
1378                         string an = typeName.Substring (idx + 1);
1379                         Assembly a;
1380                         try {
1381                                 a = Assembly.ReflectionOnlyLoad (an);
1382                         } catch {
1383                                 if (throwIfNotFound)
1384                                         throw;
1385                                 return null;
1386                         }
1387                         return a.GetType (typeName.Substring (0, idx), throwIfNotFound, ignoreCase);
1388                 }
1389
1390                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1391                 extern void GetPacking (out int packing, out int size);
1392
1393                 public virtual StructLayoutAttribute StructLayoutAttribute {
1394                         get {
1395                                 LayoutKind kind;
1396
1397                                 if (IsLayoutSequential)
1398                                         kind = LayoutKind.Sequential;
1399                                 else if (IsExplicitLayout)
1400                                         kind = LayoutKind.Explicit;
1401                                 else
1402                                         kind = LayoutKind.Auto;
1403
1404                                 StructLayoutAttribute attr = new StructLayoutAttribute (kind);
1405
1406                                 if (IsUnicodeClass)
1407                                         attr.CharSet = CharSet.Unicode;
1408                                 else if (IsAnsiClass)
1409                                         attr.CharSet = CharSet.Ansi;
1410                                 else
1411                                         attr.CharSet = CharSet.Auto;
1412
1413                                 if (kind != LayoutKind.Auto)
1414                                         GetPacking (out attr.Pack, out attr.Size);
1415
1416                                 return attr;
1417                         }
1418                 }
1419
1420                 internal object[] GetPseudoCustomAttributes ()
1421                 {
1422                         int count = 0;
1423
1424                         /* IsSerializable returns true for delegates/enums as well */
1425                         if ((Attributes & TypeAttributes.Serializable) != 0)
1426                                 count ++;
1427                         if ((Attributes & TypeAttributes.Import) != 0)
1428                                 count ++;
1429
1430                         if (count == 0)
1431                                 return null;
1432                         object[] attrs = new object [count];
1433                         count = 0;
1434
1435                         if ((Attributes & TypeAttributes.Serializable) != 0)
1436                                 attrs [count ++] = new SerializableAttribute ();
1437                         if ((Attributes & TypeAttributes.Import) != 0)
1438                                 attrs [count ++] = new ComImportAttribute ();
1439
1440                         return attrs;
1441                 }
1442
1443
1444 #if NET_4_0 || BOOTSTRAP_NET_4_0
1445                 public virtual bool IsEquivalentTo (Type other)
1446                 {
1447                         return this == other;
1448                 }
1449 #endif
1450
1451                 /*
1452                  * Return whenever this object is an instance of a user defined subclass
1453                  * of System.Type or an instance of TypeDelegator.
1454                  */
1455                 internal bool IsUserType {
1456                         get {
1457                                 /*
1458                                  * subclasses cannot modify _impl so if it is zero, it means the
1459                                  * type is not created by the runtime.
1460                                  */
1461                                 return _impl.Value == IntPtr.Zero &&
1462                                         (GetType ().Assembly != typeof (Type).Assembly || GetType () == typeof (TypeDelegator));
1463                         }
1464                 }
1465
1466                 void _Type.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
1467                 {
1468                         throw new NotImplementedException ();
1469                 }
1470
1471                 void _Type.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
1472                 {
1473                         throw new NotImplementedException ();
1474                 }
1475
1476                 void _Type.GetTypeInfoCount (out uint pcTInfo)
1477                 {
1478                         throw new NotImplementedException ();
1479                 }
1480
1481                 void _Type.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
1482                 {
1483                         throw new NotImplementedException ();
1484                 }
1485         }
1486 }