mcs/class/corlib/System/Type.cs

   1 //
   2 // System.Type.cs
   3 //
   4 // Authors:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //   Marek Safar (marek.safar@gmail.com)
   7 //
   8 // (C) Ximian, Inc.  http://www.ximian.com
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System.Diagnostics;
  35 using System.Reflection;
  36 using System.Reflection.Emit;
  37 using System.Collections;
  38 using System.Collections.Generic;
  39 using System.Runtime.InteropServices;
  40 using System.Runtime.CompilerServices;
  41 using System.Globalization;
  42
  43 namespace System {
  44
  45         [Serializable]
  46         [ClassInterface (ClassInterfaceType.None)]
  47         [ComVisible (true)]
  48         [ComDefaultInterface (typeof (_Type))]
  49         [StructLayout (LayoutKind.Sequential)]
  50         public abstract class Type : MemberInfo, IReflect, _Type {
  51
  52                 internal RuntimeTypeHandle _impl;
  53
  54                 public static readonly char Delimiter = '.';
  55                 public static readonly Type[] EmptyTypes = {};
  56                 public static readonly MemberFilter FilterAttribute = new MemberFilter (FilterAttribute_impl);
  57                 public static readonly MemberFilter FilterName = new MemberFilter (FilterName_impl);
  58                 public static readonly MemberFilter FilterNameIgnoreCase = new MemberFilter (FilterNameIgnoreCase_impl);
  59                 public static readonly object Missing = System.Reflection.Missing.Value;
  60
  61                 internal const BindingFlags DefaultBindingFlags =
  62                 BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance;
  63
  64                 /* implementation of the delegates for MemberFilter */
  65                 static bool FilterName_impl (MemberInfo m, object filterCriteria)
  66                 {
  67                         string name = (string) filterCriteria;
  68                         if (name == null || name.Length == 0 )
  69                                 return false; // because m.Name cannot be null or empty
  70
  71                         if (name [name.Length-1] == '*')
  72                                 return string.CompareOrdinal (name, 0, m.Name, 0, name.Length-1) == 0;
  73
  74                 return name.Equals (m.Name);
  75                 }
  76
  77                 static bool FilterNameIgnoreCase_impl (MemberInfo m, object filterCriteria)
  78                 {
  79                         string name = (string) filterCriteria;
  80                         if (name == null || name.Length == 0 )
  81                                 return false; // because m.Name cannot be null or empty
  82
  83                         if (name [name.Length-1] == '*')
  84                                 return string.Compare (name, 0, m.Name, 0, name.Length-1, StringComparison.OrdinalIgnoreCase) == 0;
  85
  86                         return string.Equals (name, m.Name, StringComparison.OrdinalIgnoreCase);
  87                 }
  88
  89                 static bool FilterAttribute_impl (MemberInfo m, object filterCriteria)
  90                 {
  91                         int flags = ((IConvertible)filterCriteria).ToInt32 (null);
  92                         if (m is MethodInfo)
  93                                 return ((int)((MethodInfo)m).Attributes & flags) != 0;
  94                         if (m is FieldInfo)
  95                                 return ((int)((FieldInfo)m).Attributes & flags) != 0;
  96                         if (m is PropertyInfo)
  97                                 return ((int)((PropertyInfo)m).Attributes & flags) != 0;
  98                         if (m is EventInfo)
  99                                 return ((int)((EventInfo)m).Attributes & flags) != 0;
 100                         return false;
 101                 }
 102
 103                 protected Type ()
 104                 {
 105                 }
 106
 107                 /// <summary>
 108                 ///   The assembly where the type is defined.
 109                 /// </summary>
 110                 public abstract Assembly Assembly {
 111                         get;
 112                 }
 113
 114                 /// <summary>
 115                 ///   Gets the fully qualified name for the type including the
 116                 ///   assembly name where the type is defined.
 117                 /// </summary>
 118                 public abstract string AssemblyQualifiedName {
 119                         get;
 120                 }
 121
 122                 /// <summary>
 123                 ///   Returns the Attributes associated with the type.
 124                 /// </summary>
 125                 public TypeAttributes Attributes {
 126                         get {
 127                                 return GetAttributeFlagsImpl ();
 128                         }
 129                 }
 130
 131                 /// <summary>
 132                 ///   Returns the basetype for this type
 133                 /// </summary>
 134                 public abstract Type BaseType {
 135                         get;
 136                 }
 137
 138                 /// <summary>
 139                 ///   Returns the class that declares the member.
 140                 /// </summary>
 141                 public override Type DeclaringType {
 142                         get {
 143                                 return null;
 144                         }
 145                 }
 146
 147                 /// <summary>
 148                 ///
 149                 /// </summary>
 150                 public static Binder DefaultBinder {
 151                         get {
 152                                 return Binder.DefaultBinder;
 153                         }
 154                 }
 155
 156                 /// <summary>
 157                 ///    The full name of the type including its namespace
 158                 /// </summary>
 159                 public abstract string FullName {
 160                         get;
 161                 }
 162
 163                 public abstract Guid GUID {
 164                         get;
 165                 }
 166
 167                 public bool HasElementType {
 168                         get {
 169                                 return HasElementTypeImpl ();
 170                         }
 171                 }
 172
 173                 public bool IsAbstract {
 174                         get {
 175                                 return (Attributes & TypeAttributes.Abstract) != 0;
 176                         }
 177                 }
 178
 179                 public bool IsAnsiClass {
 180                         get {
 181                                 return (Attributes & TypeAttributes.StringFormatMask)
 182                                 == TypeAttributes.AnsiClass;
 183                         }
 184                 }
 185
 186                 public bool IsArray {
 187                         get {
 188                                 return IsArrayImpl ();
 189                         }
 190                 }
 191
 192                 public bool IsAutoClass {
 193                         get {
 194                                 return (Attributes & TypeAttributes.StringFormatMask) == TypeAttributes.AutoClass;
 195                         }
 196                 }
 197
 198                 public bool IsAutoLayout {
 199                         get {
 200                                 return (Attributes & TypeAttributes.LayoutMask) == TypeAttributes.AutoLayout;
 201                         }
 202                 }
 203
 204                 public bool IsByRef {
 205                         get {
 206                                 return IsByRefImpl ();
 207                         }
 208                 }
 209
 210                 public bool IsClass {
 211                         get {
 212                                 if (IsInterface)
 213                                         return false;
 214
 215                                 return !IsValueType;
 216                         }
 217                 }
 218
 219                 public bool IsCOMObject {
 220                         get {
 221                                 return IsCOMObjectImpl ();
 222                         }
 223                 }
 224
 225 #if NET_4_5
 226                 public virtual bool IsConstructedGenericType {
 227                         get {
 228                                 throw new NotImplementedException ();
 229                         }
 230                 }
 231 #endif
 232
 233                 public bool IsContextful {
 234                         get {
 235                                 return IsContextfulImpl ();
 236                         }
 237                 }
 238
 239                 public
 240 #if NET_4_0
 241                 virtual
 242 #endif
 243                 bool IsEnum {
 244                         get {
 245                                 return IsSubclassOf (typeof (Enum));
 246                         }
 247                 }
 248
 249                 public bool IsExplicitLayout {
 250                         get {
 251                                 return (Attributes & TypeAttributes.LayoutMask) == TypeAttributes.ExplicitLayout;
 252                         }
 253                 }
 254
 255                 public bool IsImport {
 256                         get {
 257                                 return (Attributes & TypeAttributes.Import) != 0;
 258                         }
 259                 }
 260
 261                 public bool IsInterface {
 262                         get {
 263                                 return (Attributes & TypeAttributes.ClassSemanticsMask) == TypeAttributes.Interface;
 264                         }
 265                 }
 266
 267                 public bool IsLayoutSequential {
 268                         get {
 269                                 return (Attributes & TypeAttributes.LayoutMask) == TypeAttributes.SequentialLayout;
 270                         }
 271                 }
 272
 273                 public bool IsMarshalByRef {
 274                         get {
 275                                 return IsMarshalByRefImpl ();
 276                         }
 277                 }
 278
 279                 public bool IsNestedAssembly {
 280                         get {
 281                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedAssembly;
 282                         }
 283                 }
 284
 285                 public bool IsNestedFamANDAssem {
 286                         get {
 287                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedFamANDAssem;
 288                         }
 289                 }
 290
 291                 public bool IsNestedFamily {
 292                         get {
 293                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedFamily;
 294                         }
 295                 }
 296
 297                 public bool IsNestedFamORAssem {
 298                         get {
 299                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedFamORAssem;
 300                         }
 301                 }
 302
 303                 public bool IsNestedPrivate {
 304                         get {
 305                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedPrivate;
 306                         }
 307                 }
 308
 309                 public bool IsNestedPublic {
 310                         get {
 311                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NestedPublic;
 312                         }
 313                 }
 314
 315                 public bool IsNotPublic {
 316                         get {
 317                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.NotPublic;
 318                         }
 319                 }
 320
 321                 public bool IsPointer {
 322                         get {
 323                                 return IsPointerImpl ();
 324                         }
 325                 }
 326
 327                 public bool IsPrimitive {
 328                         get {
 329                                 return IsPrimitiveImpl ();
 330                         }
 331                 }
 332
 333                 public bool IsPublic {
 334                         get {
 335                                 return (Attributes & TypeAttributes.VisibilityMask) == TypeAttributes.Public;
 336                         }
 337                 }
 338
 339                 public bool IsSealed {
 340                         get {
 341                                 return (Attributes & TypeAttributes.Sealed) != 0;
 342                         }
 343                 }
 344
 345                 public
 346 #if NET_4_0
 347                 virtual
 348 #endif
 349                 bool IsSerializable {
 350                         get {
 351                                 if ((Attributes & TypeAttributes.Serializable) != 0)
 352                                         return true;
 353
 354                                 // Enums and delegates are always serializable
 355
 356                                 Type type = UnderlyingSystemType;
 357                                 if (type == null)
 358                                         return false;
 359
 360                                 // Fast check for system types
 361                                 if (type.IsSystemType)
 362                                         return type_is_subtype_of (type, typeof (Enum), false) || type_is_subtype_of (type, typeof (Delegate), false);
 363
 364                                 // User defined types depend on this behavior
 365                                 do {
 366                                         if ((type == typeof (Enum)) || (type == typeof (Delegate)))
 367                                                 return true;
 368
 369                                         type = type.BaseType;
 370                                 } while (type != null);
 371
 372                                 return false;
 373                         }
 374                 }
 375
 376                 public bool IsSpecialName {
 377                         get {
 378                                 return (Attributes & TypeAttributes.SpecialName) != 0;
 379                         }
 380                 }
 381
 382                 public bool IsUnicodeClass {
 383                         get {
 384                                 return (Attributes & TypeAttributes.StringFormatMask) == TypeAttributes.UnicodeClass;
 385                         }
 386                 }
 387
 388                 public bool IsValueType {
 389                         get {
 390                                 return IsValueTypeImpl ();
 391                         }
 392                 }
 393
 394                 public override MemberTypes MemberType {
 395                         get {
 396                                 return MemberTypes.TypeInfo;
 397                         }
 398                 }
 399
 400                 public abstract override Module Module {
 401                         get;
 402                 }
 403
 404                 public abstract string Namespace {get;}
 405
 406                 public override Type ReflectedType {
 407                         get {
 408                                 return null;
 409                         }
 410                 }
 411
 412                 public virtual RuntimeTypeHandle TypeHandle {
 413                         get { throw new ArgumentException ("Derived class must provide implementation."); }
 414                 }
 415
 416                 [ComVisible (true)]
 417                 public ConstructorInfo TypeInitializer {
 418                         get {
 419                                 return GetConstructorImpl (
 420                                         BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static,
 421                                         null,
 422                                         CallingConventions.Any,
 423                                         EmptyTypes,
 424                                         null);
 425                         }
 426                 }
 427
 428                 /*
 429                  * This has NOTHING to do with getting the base type of an enum. Use
 430                  * Enum.GetUnderlyingType () for that.
 431                  */
 432                 public abstract Type UnderlyingSystemType {get;}
 433
 434                 public override bool Equals (object o)
 435                 {
 436 #if NET_4_0
 437                         return Equals (o as Type);
 438 #else
 439                         if (o == this)
 440                                 return true;
 441
 442                         Type me = UnderlyingSystemType;
 443                         if (me == null)
 444                                 return false;
 445                         return me.EqualsInternal (o as Type);
 446 #endif
 447                 }
 448
 449 #if NET_4_0
 450                 public virtual bool Equals (Type o)
 451                 {
 452                         if ((object)o == (object)this)
 453                                 return true;
 454                         if ((object)o == null)
 455                                 return false;
 456                         Type me = UnderlyingSystemType;
 457                         if ((object)me == null)
 458                                 return false;
 459
 460                         o = o.UnderlyingSystemType;
 461                         if ((object)o == null)
 462                                 return false;
 463                         if ((object)o == (object)this)
 464                                 return true;
 465                         return me.EqualsInternal (o);
 466                 }
 467 #else
 468                 public bool Equals (Type o)
 469                 {
 470
 471                         if (o == this)
 472                                 return true;
 473                         if (o == null)
 474                                 return false;
 475                         Type me = UnderlyingSystemType;
 476                         if (me == null)
 477                                 return false;
 478                         return me.EqualsInternal (o.UnderlyingSystemType);
 479                 }
 480 #endif
 481 #if NET_4_0
 482                 [MonoTODO ("Implement it properly once 4.0 impl details are known.")]
 483                 public static bool operator == (Type left, Type right)
 484                 {
 485                         return Object.ReferenceEquals (left, right);
 486                 }
 487
 488                 [MonoTODO ("Implement it properly once 4.0 impl details are known.")]
 489                 public static bool operator != (Type left, Type right)
 490                 {
 491                         return !Object.ReferenceEquals (left, right);
 492                 }
 493
 494                 [MonoInternalNote ("Reimplement this in MonoType for bonus speed")]
 495                 public virtual Type GetEnumUnderlyingType () {
 496                         if (!IsEnum)
 497                                 throw new ArgumentException ("Type is not an enumeration", "enumType");
 498
 499                         var fields = GetFields (BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
 500
 501                         if (fields == null || fields.Length != 1)
 502                                 throw new ArgumentException ("An enum must have exactly one instance field", "enumType");
 503
 504                         return fields [0].FieldType;
 505                 }
 506
 507                 [MonoInternalNote ("Reimplement this in MonoType for bonus speed")]
 508                 public virtual string[] GetEnumNames () {
 509                         if (!IsEnum)
 510                                 throw new ArgumentException ("Type is not an enumeration", "enumType");
 511
 512                         var fields = GetFields (BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
 513
 514                         string [] names = new string [fields.Length];
 515                         if (0 != names.Length) {
 516                                 for (int i = 0; i < fields.Length; ++i)
 517                                         names [i] = fields [i].Name;
 518
 519                                 var et = GetEnumUnderlyingType ();
 520                                 var values = Array.CreateInstance (et, names.Length);
 521                                 for (int i = 0; i < fields.Length; ++i)
 522                                         values.SetValue (fields [i].GetValue (null), i);
 523                                 MonoEnumInfo.SortEnums (et, values, names);
 524                         }
 525
 526                         return names;
 527                 }
 528
 529                 static NotImplementedException CreateNIE () {
 530                         return new NotImplementedException ();
 531                 }
 532
 533                 public virtual Array GetEnumValues () {
 534                         if (!IsEnum)
 535                                 throw new ArgumentException ("Type is not an enumeration", "enumType");
 536
 537                         throw CreateNIE ();
 538                 }
 539
 540                 bool IsValidEnumType (Type type) {
 541                         return (type.IsPrimitive && type != typeof (bool) && type != typeof (double) && type != typeof (float)) || type.IsEnum;
 542                 }
 543
 544                 [MonoInternalNote ("Reimplement this in MonoType for bonus speed")]
 545                 public virtual string GetEnumName (object value) {
 546                         if (value == null)
 547                                 throw new ArgumentException ("Value is null", "value");
 548                         if (!IsValidEnumType (value.GetType ()))
 549                                 throw new ArgumentException ("Value is not the enum or a valid enum underlying type", "value");
 550                         if (!IsEnum)
 551                                 throw new ArgumentException ("Type is not an enumeration", "enumType");
 552
 553                         object obj = null;
 554                         var fields = GetFields (BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
 555
 556                         for (int i = 0; i < fields.Length; ++i) {
 557                                 var fv = fields [i].GetValue (null);
 558                                 if (obj == null) {
 559                                         try {
 560                                                 //XXX we can't use 'this' as argument as it might be an UserType
 561                                                 obj = Enum.ToObject (fv.GetType (), value);
 562                                         } catch (OverflowException) {
 563                                                 return null;
 564                                         } catch (InvalidCastException) {
 565                                                 throw new ArgumentException ("Value is not valid", "value");
 566                                         }
 567                                 }
 568                                 if (fv.Equals (obj))
 569                                         return fields [i].Name;
 570                         }
 571
 572                         return null;
 573                 }
 574
 575                 [MonoInternalNote ("Reimplement this in MonoType for bonus speed")]
 576                 public virtual bool IsEnumDefined (object value) {
 577                         if (value == null)
 578                                 throw new ArgumentException ("Value is null", "value");
 579                         if (!IsEnum)
 580                                 throw new ArgumentException ("Type is not an enumeration", "enumType");
 581
 582                         Type vt = value.GetType ();
 583                         if (!IsValidEnumType (vt) && vt != typeof (string))
 584                                 throw new InvalidOperationException ("Value is not the enum or a valid enum underlying type");
 585
 586                         var fields = GetFields (BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
 587
 588                         if (value is string) {
 589                                 for (int i = 0; i < fields.Length; ++i) {
 590                                         if (fields [i].Name.Equals (value))
 591                                                 return true;
 592                                 }
 593                         } else {
 594                                 if (vt != this && vt != GetEnumUnderlyingType ())
 595                                         throw new ArgumentException ("Value is not the enum or a valid enum underlying type", "value");
 596
 597                                 object obj = null;
 598                                 for (int i = 0; i < fields.Length; ++i) {
 599                                         var fv = fields [i].GetValue (null);
 600                                         if (obj == null) {
 601                                                 try {
 602                                                         //XXX we can't use 'this' as argument as it might be an UserType
 603                                                         obj = Enum.ToObject (fv.GetType (), value);
 604                                                 } catch (OverflowException) {
 605                                                         return false;
 606                                                 } catch (InvalidCastException) {
 607                                                         throw new ArgumentException ("Value is not valid", "value");
 608                                                 }
 609                                         }
 610                                         if (fv.Equals (obj))
 611                                                 return true;
 612                                 }
 613                         }
 614                         return false;
 615                 }
 616
 617                 public static Type GetType (string typeName, Func<AssemblyName,Assembly> assemblyResolver, Func<Assembly,string,bool,Type> typeResolver)
 618                 {
 619                         return GetType (typeName, assemblyResolver, typeResolver, false, false);
 620                 }
 621
 622                 public static Type GetType (string typeName, Func<AssemblyName,Assembly> assemblyResolver, Func<Assembly,string,bool,Type> typeResolver, bool throwOnError)
 623                 {
 624                         return GetType (typeName, assemblyResolver, typeResolver, throwOnError, false);
 625                 }
 626
 627                 public static Type GetType (string typeName, Func<AssemblyName,Assembly> assemblyResolver, Func<Assembly,string,bool,Type> typeResolver, bool throwOnError, bool ignoreCase)
 628                 {
 629                         TypeSpec spec = TypeSpec.Parse (typeName);
 630                         return spec.Resolve (assemblyResolver, typeResolver, throwOnError, ignoreCase);
 631                 }
 632
 633                 public virtual bool IsSecurityTransparent
 634                 {
 635                         get { throw CreateNIE (); }
 636                 }
 637
 638                 public virtual bool IsSecurityCritical
 639                 {
 640                         get { throw CreateNIE (); }
 641                 }
 642
 643                 public virtual bool IsSecuritySafeCritical
 644                 {
 645                         get { throw CreateNIE (); }
 646                 }
 647 #endif
 648
 649                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 650                 internal extern bool EqualsInternal (Type type);
 651
 652                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 653                 private static extern Type internal_from_handle (IntPtr handle);
 654
 655                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 656                 private static extern Type internal_from_name (string name, bool throwOnError, bool ignoreCase);
 657
 658                 public static Type GetType(string typeName)
 659                 {
 660                         if (typeName == null)
 661                                 throw new ArgumentNullException ("TypeName");
 662
 663                         return internal_from_name (typeName, false, false);
 664                 }
 665
 666                 public static Type GetType(string typeName, bool throwOnError)
 667                 {
 668                         if (typeName == null)
 669                                 throw new ArgumentNullException ("TypeName");
 670
 671                         Type type = internal_from_name (typeName, throwOnError, false);
 672                         if (throwOnError && type == null)
 673                                 throw new TypeLoadException ("Error loading '" + typeName + "'");
 674
 675                         return type;
 676                 }
 677
 678                 public static Type GetType(string typeName, bool throwOnError, bool ignoreCase)
 679                 {
 680                         if (typeName == null)
 681                                 throw new ArgumentNullException ("TypeName");
 682
 683                         Type t = internal_from_name (typeName, throwOnError, ignoreCase);
 684                         if (throwOnError && t == null)
 685                                 throw new TypeLoadException ("Error loading '" + typeName + "'");
 686
 687                         return t;
 688                 }
 689
 690                 public static Type[] GetTypeArray (object[] args) {
 691                         if (args == null)
 692                                 throw new ArgumentNullException ("args");
 693
 694                         Type[] ret;
 695                         ret = new Type [args.Length];
 696                         for (int i = 0; i < args.Length; ++i)
 697                                 ret [i] = args[i].GetType ();
 698                         return ret;
 699                 }
 700
 701                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 702                 internal extern static TypeCode GetTypeCodeInternal (Type type);
 703
 704 #if NET_4_0
 705                 protected virtual
 706 #endif
 707                 TypeCode GetTypeCodeImpl () {
 708                         Type type = this;
 709                         if (type is MonoType)
 710                                 return GetTypeCodeInternal (type);
 711                         if (type is TypeBuilder)
 712                                 return ((TypeBuilder)type).GetTypeCodeInternal ();
 713
 714                         type = type.UnderlyingSystemType;
 715
 716                         if (!type.IsSystemType)
 717                                 return TypeCode.Object;
 718                         else
 719                                 return GetTypeCodeInternal (type);
 720                 }
 721
 722                 public static TypeCode GetTypeCode (Type type) {
 723                         if (type == null)
 724                                 /* MS.NET returns this */
 725                                 return TypeCode.Empty;
 726                         return type.GetTypeCodeImpl ();
 727                 }
 728
 729                 [MonoTODO("This operation is currently not supported by Mono")]
 730                 public static Type GetTypeFromCLSID (Guid clsid)
 731                 {
 732                         throw new NotImplementedException ();
 733                 }
 734
 735                 [MonoTODO("This operation is currently not supported by Mono")]
 736                 public static Type GetTypeFromCLSID (Guid clsid, bool throwOnError)
 737                 {
 738                         throw new NotImplementedException ();
 739                 }
 740
 741                 [MonoTODO("This operation is currently not supported by Mono")]
 742                 public static Type GetTypeFromCLSID (Guid clsid, string server)
 743                 {
 744                         throw new NotImplementedException ();
 745                 }
 746
 747                 [MonoTODO("This operation is currently not supported by Mono")]
 748                 public static Type GetTypeFromCLSID (Guid clsid, string server, bool throwOnError)
 749                 {
 750                         throw new NotImplementedException ();
 751                 }
 752
 753                 public static Type GetTypeFromHandle (RuntimeTypeHandle handle)
 754                 {
 755                         if (handle.Value == IntPtr.Zero)
 756                                 // This is not consistent with the other GetXXXFromHandle methods, but
 757                                 // MS.NET seems to do this
 758                                 return null;
 759
 760                         return internal_from_handle (handle.Value);
 761                 }
 762
 763                 [MonoTODO("Mono does not support COM")]
 764                 public static Type GetTypeFromProgID (string progID)
 765                 {
 766                         throw new NotImplementedException ();
 767                 }
 768
 769                 [MonoTODO("Mono does not support COM")]
 770                 public static Type GetTypeFromProgID (string progID, bool throwOnError)
 771                 {
 772                         throw new NotImplementedException ();
 773                 }
 774
 775                 [MonoTODO("Mono does not support COM")]
 776                 public static Type GetTypeFromProgID (string progID, string server)
 777                 {
 778                         throw new NotImplementedException ();
 779                 }
 780
 781                 [MonoTODO("Mono does not support COM")]
 782                 public static Type GetTypeFromProgID (string progID, string server, bool throwOnError)
 783                 {
 784                         throw new NotImplementedException ();
 785                 }
 786
 787                 public static RuntimeTypeHandle GetTypeHandle (object o)
 788                 {
 789                         if (o == null)
 790                                 throw new ArgumentNullException ();
 791
 792                         return o.GetType().TypeHandle;
 793                 }
 794
 795                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 796                 internal static extern bool type_is_subtype_of (Type a, Type b, bool check_interfaces);
 797
 798                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 799                 internal static extern bool type_is_assignable_from (Type a, Type b);
 800
 801                 public new Type GetType ()
 802                 {
 803                         return base.GetType ();
 804                 }
 805
 806                 [ComVisible (true)]
 807                 public virtual bool IsSubclassOf (Type c)
 808                 {
 809                         if (c == null || c == this)
 810                                 return false;
 811
 812                         // Fast check for system types
 813                         if (IsSystemType)
 814                                 return c.IsSystemType && type_is_subtype_of (this, c, false);
 815
 816                         // User defined types depend on this behavior
 817                         for (Type type = BaseType; type != null; type = type.BaseType)
 818                                 if (type == c)
 819                                         return true;
 820
 821                         return false;
 822                 }
 823
 824                 public virtual Type[] FindInterfaces (TypeFilter filter, object filterCriteria)
 825                 {
 826                         if (filter == null)
 827                                 throw new ArgumentNullException ("filter");
 828
 829                         var ifaces = new List<Type> ();
 830                         foreach (Type iface in GetInterfaces ()) {
 831                                 if (filter (iface, filterCriteria))
 832                                         ifaces.Add (iface);
 833                         }
 834
 835                         return ifaces.ToArray ();
 836                 }
 837
 838                 public Type GetInterface (string name) {
 839                         return GetInterface (name, false);
 840                 }
 841
 842                 public abstract Type GetInterface (string name, bool ignoreCase);
 843
 844                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 845                 internal static extern void GetInterfaceMapData (Type t, Type iface, out MethodInfo[] targets, out MethodInfo[] methods);
 846
 847                 [ComVisible (true)]
 848                 public virtual InterfaceMapping GetInterfaceMap (Type interfaceType) {
 849                         if (!IsSystemType)
 850                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
 851                         if (interfaceType == null)
 852                                 throw new ArgumentNullException ("interfaceType");
 853                         if (!interfaceType.IsSystemType)
 854                                 throw new ArgumentException ("interfaceType", "Type is an user type");
 855                         InterfaceMapping res;
 856                         if (!interfaceType.IsInterface)
 857                                 throw new ArgumentException (Locale.GetText ("Argument must be an interface."), "interfaceType");
 858                         if (IsInterface)
 859                                 throw new ArgumentException ("'this' type cannot be an interface itself");
 860                         res.TargetType = this;
 861                         res.InterfaceType = interfaceType;
 862                         GetInterfaceMapData (this, interfaceType, out res.TargetMethods, out res.InterfaceMethods);
 863                         if (res.TargetMethods == null)
 864                                 throw new ArgumentException (Locale.GetText ("Interface not found"), "interfaceType");
 865
 866                         return res;
 867                 }
 868
 869                 public abstract Type[] GetInterfaces ();
 870
 871                 public virtual bool IsAssignableFrom (Type c)
 872                 {
 873                         if (c == null)
 874                                 return false;
 875
 876                         if (Equals (c))
 877                                 return true;
 878
 879                         if (c is TypeBuilder)
 880                                 return ((TypeBuilder)c).IsAssignableTo (this);
 881
 882                         /* Handle user defined type classes */
 883                         if (!IsSystemType) {
 884                                 Type systemType = UnderlyingSystemType;
 885                                 if (!systemType.IsSystemType)
 886                                         return false;
 887
 888                                 Type other = c.UnderlyingSystemType;
 889                                 if (!other.IsSystemType)
 890                                         return false;
 891
 892                                 return systemType.IsAssignableFrom (other);
 893                         }
 894
 895                         if (!c.IsSystemType) {
 896                                 Type underlyingType = c.UnderlyingSystemType;
 897                                 if (!underlyingType.IsSystemType)
 898                                         return false;
 899                                 return IsAssignableFrom (underlyingType);
 900                         }
 901
 902                         return type_is_assignable_from (this, c);
 903                 }
 904
 905                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 906                 extern static bool IsInstanceOfType (Type type, object o);
 907
 908                 public virtual bool IsInstanceOfType (object o)
 909                 {
 910                         Type type = UnderlyingSystemType;
 911                         if (!type.IsSystemType)
 912                                 return false;
 913                         return IsInstanceOfType (type, o);
 914                 }
 915
 916                 public virtual int GetArrayRank ()
 917                 {
 918                         throw new NotSupportedException ();     // according to MSDN
 919                 }
 920
 921                 public abstract Type GetElementType ();
 922
 923                 public EventInfo GetEvent (string name)
 924                 {
 925                         return GetEvent (name, DefaultBindingFlags);
 926                 }
 927
 928                 public abstract EventInfo GetEvent (string name, BindingFlags bindingAttr);
 929
 930                 public virtual EventInfo[] GetEvents ()
 931                 {
 932                         return GetEvents (DefaultBindingFlags);
 933                 }
 934
 935                 public abstract EventInfo[] GetEvents (BindingFlags bindingAttr);
 936
 937                 public FieldInfo GetField( string name)
 938                 {
 939                         return GetField (name, DefaultBindingFlags);
 940                 }
 941
 942                 public abstract FieldInfo GetField( string name, BindingFlags bindingAttr);
 943
 944                 public FieldInfo[] GetFields ()
 945                 {
 946                         return GetFields (DefaultBindingFlags);
 947                 }
 948
 949                 public abstract FieldInfo[] GetFields (BindingFlags bindingAttr);
 950
 951                 public override int GetHashCode()
 952                 {
 953                         Type t = UnderlyingSystemType;
 954                         if (t != null && t != this)
 955                                 return t.GetHashCode ();
 956                         return (int)_impl.Value;
 957                 }
 958
 959                 public MemberInfo[] GetMember (string name)
 960                 {
 961                         return GetMember (name, MemberTypes.All, DefaultBindingFlags);
 962                 }
 963
 964                 public virtual MemberInfo[] GetMember (string name, BindingFlags bindingAttr)
 965                 {
 966                         return GetMember (name, MemberTypes.All, bindingAttr);
 967                 }
 968
 969                 public virtual MemberInfo[] GetMember (string name, MemberTypes type, BindingFlags bindingAttr)
 970                 {
 971                         if (name == null)
 972                                 throw new ArgumentNullException ("name");
 973                         if ((bindingAttr & BindingFlags.IgnoreCase) != 0)
 974                                 return FindMembers (type, bindingAttr, FilterNameIgnoreCase, name);
 975                         else
 976                                 return FindMembers (type, bindingAttr, FilterName, name);
 977                 }
 978
 979                 public MemberInfo[] GetMembers ()
 980                 {
 981                         return GetMembers (DefaultBindingFlags);
 982                 }
 983
 984                 public abstract MemberInfo[] GetMembers (BindingFlags bindingAttr);
 985
 986                 public MethodInfo GetMethod (string name)
 987                 {
 988                         if (name == null)
 989                                 throw new ArgumentNullException ("name");
 990                         return GetMethodImpl (name, DefaultBindingFlags, null, CallingConventions.Any, null, null);
 991                 }
 992
 993                 public MethodInfo GetMethod (string name, BindingFlags bindingAttr)
 994                 {
 995                         if (name == null)
 996                                 throw new ArgumentNullException ("name");
 997
 998                         return GetMethodImpl (name, bindingAttr, null, CallingConventions.Any, null, null);
 999                 }
1000
1001                 public MethodInfo GetMethod (string name, Type[] types)
1002                 {
1003                         return GetMethod (name, DefaultBindingFlags, null, CallingConventions.Any, types, null);
1004                 }
1005
1006                 public MethodInfo GetMethod (string name, Type[] types, ParameterModifier[] modifiers)
1007                 {
1008                         return GetMethod (name, DefaultBindingFlags, null, CallingConventions.Any, types, modifiers);
1009                 }
1010
1011                 public MethodInfo GetMethod (string name, BindingFlags bindingAttr, Binder binder,
1012                                              Type[] types, ParameterModifier[] modifiers)
1013                 {
1014                         return GetMethod (name, bindingAttr, binder, CallingConventions.Any, types, modifiers);
1015                 }
1016
1017                 public MethodInfo GetMethod (string name, BindingFlags bindingAttr, Binder binder,
1018                                              CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers)
1019                 {
1020                         if (name == null)
1021                                 throw new ArgumentNullException ("name");
1022                         if (types == null)
1023                                 throw new ArgumentNullException ("types");
1024
1025                         for (int i = 0; i < types.Length; i++)
1026                                 if (types[i] == null)
1027                                         throw new ArgumentNullException ("types");
1028
1029                         return GetMethodImpl (name, bindingAttr, binder, callConvention, types, modifiers);
1030                 }
1031
1032                 protected abstract MethodInfo GetMethodImpl (string name, BindingFlags bindingAttr, Binder binder,
1033                                                              CallingConventions callConvention, Type[] types,
1034                                                              ParameterModifier[] modifiers);
1035
1036                 internal MethodInfo GetMethodImplInternal (string name, BindingFlags bindingAttr, Binder binder,
1037                                                                                                                         CallingConventions callConvention, Type[] types,
1038                                                                                                                         ParameterModifier[] modifiers)
1039                 {
1040                         return GetMethodImpl (name, bindingAttr, binder, callConvention, types, modifiers);
1041                 }
1042
1043                 internal virtual MethodInfo GetMethod (MethodInfo fromNoninstanciated)
1044                 {
1045                         throw new System.InvalidOperationException ("can only be called in generic type");
1046                 }
1047
1048                 internal virtual ConstructorInfo GetConstructor (ConstructorInfo fromNoninstanciated)
1049                 {
1050                         throw new System.InvalidOperationException ("can only be called in generic type");
1051                 }
1052
1053                 internal virtual FieldInfo GetField (FieldInfo fromNoninstanciated)
1054                 {
1055                         throw new System.InvalidOperationException ("can only be called in generic type");
1056                 }
1057
1058
1059                 public MethodInfo[] GetMethods ()
1060                 {
1061                         return GetMethods (DefaultBindingFlags);
1062                 }
1063
1064                 public abstract MethodInfo[] GetMethods (BindingFlags bindingAttr);
1065
1066                 public Type GetNestedType (string name)
1067                 {
1068                         return GetNestedType (name, DefaultBindingFlags);
1069                 }
1070
1071                 public abstract Type GetNestedType (string name, BindingFlags bindingAttr);
1072
1073                 public Type[] GetNestedTypes ()
1074                 {
1075                         return GetNestedTypes (DefaultBindingFlags);
1076                 }
1077
1078                 public abstract Type[] GetNestedTypes (BindingFlags bindingAttr);
1079
1080
1081                 public PropertyInfo[] GetProperties ()
1082                 {
1083                         return GetProperties (DefaultBindingFlags);
1084                 }
1085
1086                 public abstract PropertyInfo[] GetProperties (BindingFlags bindingAttr);
1087
1088
1089                 public PropertyInfo GetProperty (string name)
1090                 {
1091                         if (name == null)
1092                                 throw new ArgumentNullException ("name");
1093
1094                         return GetPropertyImpl (name, DefaultBindingFlags, null, null, null, null);
1095                 }
1096
1097                 public PropertyInfo GetProperty (string name, BindingFlags bindingAttr)
1098                 {
1099                         if (name == null)
1100                                 throw new ArgumentNullException ("name");
1101                         return GetPropertyImpl (name, bindingAttr, null, null, null, null);
1102                 }
1103
1104                 public PropertyInfo GetProperty (string name, Type returnType)
1105                 {
1106                         if (name == null)
1107                                 throw new ArgumentNullException ("name");
1108                         return GetPropertyImpl (name, DefaultBindingFlags, null, returnType, null, null);
1109                 }
1110
1111                 public PropertyInfo GetProperty (string name, Type[] types)
1112                 {
1113                         return GetProperty (name, DefaultBindingFlags, null, null, types, null);
1114                 }
1115
1116                 public PropertyInfo GetProperty (string name, Type returnType, Type[] types)
1117                 {
1118                         return GetProperty (name, DefaultBindingFlags, null, returnType, types, null);
1119                 }
1120
1121                 public PropertyInfo GetProperty( string name, Type returnType, Type[] types, ParameterModifier[] modifiers)
1122                 {
1123                         return GetProperty (name, DefaultBindingFlags, null, returnType, types, modifiers);
1124                 }
1125
1126                 public PropertyInfo GetProperty (string name, BindingFlags bindingAttr, Binder binder, Type returnType,
1127                                                  Type[] types, ParameterModifier[] modifiers)
1128                 {
1129                         if (name == null)
1130                                 throw new ArgumentNullException ("name");
1131                         if (types == null)
1132                                 throw new ArgumentNullException ("types");
1133
1134                         foreach (Type t in types) {
1135                                 if (t == null)
1136                                         throw new ArgumentNullException ("types");
1137                         }
1138
1139                         return GetPropertyImpl (name, bindingAttr, binder, returnType, types, modifiers);
1140                 }
1141
1142                 protected abstract PropertyInfo GetPropertyImpl (string name, BindingFlags bindingAttr, Binder binder,
1143                                                                  Type returnType, Type[] types, ParameterModifier[] modifiers);
1144
1145                 internal PropertyInfo GetPropertyImplInternal (string name, BindingFlags bindingAttr, Binder binder,
1146                                                                                                            Type returnType, Type[] types, ParameterModifier[] modifiers)
1147                 {
1148                         return GetPropertyImpl (name, bindingAttr, binder, returnType, types, modifiers);
1149                 }
1150
1151                 protected abstract ConstructorInfo GetConstructorImpl (BindingFlags bindingAttr,
1152                                                                        Binder binder,
1153                                                                        CallingConventions callConvention,
1154                                                                        Type[] types,
1155                                                                        ParameterModifier[] modifiers);
1156
1157                 protected abstract TypeAttributes GetAttributeFlagsImpl ();
1158                 protected abstract bool HasElementTypeImpl ();
1159                 protected abstract bool IsArrayImpl ();
1160                 protected abstract bool IsByRefImpl ();
1161                 protected abstract bool IsCOMObjectImpl ();
1162                 protected abstract bool IsPointerImpl ();
1163                 protected abstract bool IsPrimitiveImpl ();
1164
1165                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1166                 internal static extern bool IsArrayImpl (Type type);
1167
1168                 protected virtual bool IsValueTypeImpl ()
1169                 {
1170                         if (this == typeof (ValueType) || this == typeof (Enum))
1171                                 return false;
1172
1173                         return IsSubclassOf (typeof (ValueType));
1174                 }
1175
1176                 protected virtual bool IsContextfulImpl ()
1177                 {
1178                         return typeof (ContextBoundObject).IsAssignableFrom (this);
1179                 }
1180
1181                 protected virtual bool IsMarshalByRefImpl ()
1182                 {
1183                         return typeof (MarshalByRefObject).IsAssignableFrom (this);
1184                 }
1185
1186                 [ComVisible (true)]
1187                 public ConstructorInfo GetConstructor (Type[] types)
1188                 {
1189                         return GetConstructor (BindingFlags.Public|BindingFlags.Instance, null, CallingConventions.Any, types, null);
1190                 }
1191
1192                 [ComVisible (true)]
1193                 public ConstructorInfo GetConstructor (BindingFlags bindingAttr, Binder binder,
1194                                                        Type[] types, ParameterModifier[] modifiers)
1195                 {
1196                         return GetConstructor (bindingAttr, binder, CallingConventions.Any, types, modifiers);
1197                 }
1198
1199                 [ComVisible (true)]
1200                 public ConstructorInfo GetConstructor (BindingFlags bindingAttr, Binder binder,
1201                                                        CallingConventions callConvention,
1202                                                        Type[] types, ParameterModifier[] modifiers)
1203                 {
1204                         if (types == null)
1205                                 throw new ArgumentNullException ("types");
1206
1207                         foreach (Type t in types) {
1208                                 if (t == null)
1209                                         throw new ArgumentNullException ("types");
1210                         }
1211
1212                         return GetConstructorImpl (bindingAttr, binder, callConvention, types, modifiers);
1213                 }
1214
1215                 [ComVisible (true)]
1216                 public ConstructorInfo[] GetConstructors ()
1217                 {
1218                         return GetConstructors (BindingFlags.Public | BindingFlags.Instance);
1219                 }
1220
1221                 [ComVisible (true)]
1222                 public abstract ConstructorInfo[] GetConstructors (BindingFlags bindingAttr);
1223
1224                 public virtual MemberInfo[] GetDefaultMembers ()
1225                 {
1226                         object [] att = GetCustomAttributes (typeof (DefaultMemberAttribute), true);
1227                         if (att.Length == 0)
1228                                 return new MemberInfo [0];
1229
1230                         MemberInfo [] member = GetMember (((DefaultMemberAttribute) att [0]).MemberName);
1231                         return (member != null) ? member : new MemberInfo [0];
1232                 }
1233
1234                 public virtual MemberInfo[] FindMembers (MemberTypes memberType, BindingFlags bindingAttr,
1235                                                          MemberFilter filter, object filterCriteria)
1236                 {
1237                         MemberInfo[] result;
1238                         ArrayList l = new ArrayList ();
1239
1240                         // Console.WriteLine ("FindMembers for {0} (Type: {1}): {2}",
1241                         // this.FullName, this.GetType().FullName, this.obj_address());
1242                         if ((memberType & MemberTypes.Method) != 0) {
1243                                 MethodInfo[] c = GetMethods (bindingAttr);
1244                                 if (filter != null) {
1245                                         foreach (MemberInfo m in c) {
1246                                                 if (filter (m, filterCriteria))
1247                                                         l.Add (m);
1248                                         }
1249                                 } else {
1250                                         l.AddRange (c);
1251                                 }
1252                         }
1253                         if ((memberType & MemberTypes.Constructor) != 0) {
1254                                 ConstructorInfo[] c = GetConstructors (bindingAttr);
1255                                 if (filter != null) {
1256                                         foreach (MemberInfo m in c) {
1257                                                 if (filter (m, filterCriteria))
1258                                                         l.Add (m);
1259                                         }
1260                                 } else {
1261                                         l.AddRange (c);
1262                                 }
1263                         }
1264                         if ((memberType & MemberTypes.Property) != 0) {
1265                                 PropertyInfo[] c = GetProperties (bindingAttr);
1266
1267
1268                                 if (filter != null) {
1269                                         foreach (MemberInfo m in c) {
1270                                                 if (filter (m, filterCriteria))
1271                                                         l.Add (m);
1272                                         }
1273                                 } else {
1274                                         l.AddRange (c);
1275                                 }
1276
1277                         }
1278                         if ((memberType & MemberTypes.Event) != 0) {
1279                                 EventInfo[] c = GetEvents (bindingAttr);
1280                                 if (filter != null) {
1281                                         foreach (MemberInfo m in c) {
1282                                                 if (filter (m, filterCriteria))
1283                                                         l.Add (m);
1284                                         }
1285                                 } else {
1286                                         l.AddRange (c);
1287                                 }
1288                         }
1289                         if ((memberType & MemberTypes.Field) != 0) {
1290                                 FieldInfo[] c = GetFields (bindingAttr);
1291                                 if (filter != null) {
1292                                         foreach (MemberInfo m in c) {
1293                                                 if (filter (m, filterCriteria))
1294                                                         l.Add (m);
1295                                         }
1296                                 } else {
1297                                         l.AddRange (c);
1298                                 }
1299                         }
1300                         if ((memberType & MemberTypes.NestedType) != 0) {
1301                                 Type[] c = GetNestedTypes (bindingAttr);
1302                                 if (filter != null) {
1303                                         foreach (MemberInfo m in c) {
1304                                                 if (filter (m, filterCriteria)) {
1305                                                         l.Add (m);
1306                                                 }
1307                                         }
1308                                 } else {
1309                                         l.AddRange (c);
1310                                 }
1311                         }
1312
1313                         switch (memberType) {
1314                         case MemberTypes.Constructor :
1315                                 result = new ConstructorInfo [l.Count];
1316                                 break;
1317                         case MemberTypes.Event :
1318                                 result = new EventInfo [l.Count];
1319                                 break;
1320                         case MemberTypes.Field :
1321                                 result = new FieldInfo [l.Count];
1322                                 break;
1323                         case MemberTypes.Method :
1324                                 result = new MethodInfo [l.Count];
1325                                 break;
1326                         case MemberTypes.NestedType :
1327                         case MemberTypes.TypeInfo :
1328                                 result = new Type [l.Count];
1329                                 break;
1330                         case MemberTypes.Property :
1331                                 result = new PropertyInfo [l.Count];
1332                                 break;
1333                         default :
1334                                 result = new MemberInfo [l.Count];
1335                                 break;
1336                         }
1337                         l.CopyTo (result);
1338                         return result;
1339                 }
1340
1341                 [DebuggerHidden]
1342                 [DebuggerStepThrough]
1343                 public object InvokeMember (string name, BindingFlags invokeAttr, Binder binder, object target, object[] args)
1344                 {
1345                         return InvokeMember (name, invokeAttr, binder, target, args, null, null, null);
1346                 }
1347
1348                 [DebuggerHidden]
1349                 [DebuggerStepThrough]
1350                 public object InvokeMember (string name, BindingFlags invokeAttr, Binder binder,
1351                                             object target, object[] args, CultureInfo culture)
1352                 {
1353                         return InvokeMember (name, invokeAttr, binder, target, args, null, culture, null);
1354                 }
1355
1356                 public abstract object InvokeMember (string name, BindingFlags invokeAttr,
1357                                                      Binder binder, object target, object[] args,
1358                                                      ParameterModifier[] modifiers,
1359                                                      CultureInfo culture, string[] namedParameters);
1360
1361                 public override string ToString()
1362                 {
1363                         return FullName;
1364                 }
1365
1366                 internal virtual Type InternalResolve ()
1367                 {
1368                         return UnderlyingSystemType;
1369                 }
1370
1371                 internal bool IsSystemType {
1372                         get {
1373                                 return _impl.Value != IntPtr.Zero;
1374                         }
1375                 }
1376
1377 #if NET_4_5
1378                 public virtual Type[] GenericTypeArguments {
1379                         get {
1380                                 return IsGenericType ? GetGenericArguments () : EmptyTypes;
1381                         }
1382                 }
1383 #endif
1384
1385                 public virtual Type[] GetGenericArguments ()
1386                 {
1387                         throw new NotSupportedException ();
1388                 }
1389
1390                 public virtual bool ContainsGenericParameters {
1391                         get { return false; }
1392                 }
1393
1394                 public virtual extern bool IsGenericTypeDefinition {
1395                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1396                         get;
1397                 }
1398
1399                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1400                 internal extern Type GetGenericTypeDefinition_impl ();
1401
1402                 public virtual Type GetGenericTypeDefinition ()
1403                 {
1404                         throw new NotSupportedException ("Derived classes must provide an implementation.");
1405                 }
1406
1407                 public virtual extern bool IsGenericType {
1408                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1409                         get;
1410                 }
1411
1412                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1413                 static extern Type MakeGenericType (Type gt, Type [] types);
1414
1415                 static AssemblyBuilder PeelAssemblyBuilder (Type type)
1416                 {
1417                         if (type.Assembly is AssemblyBuilder)
1418                                 return (AssemblyBuilder)type.Assembly;
1419
1420                         if (type.HasElementType)
1421                                 return PeelAssemblyBuilder (type.GetElementType ());
1422
1423                         if (!type.IsGenericType || type.IsGenericParameter || type.IsGenericTypeDefinition)
1424                                 return null;
1425
1426                         foreach (Type arg in type.GetGenericArguments ()) {
1427                                 AssemblyBuilder ab = PeelAssemblyBuilder (arg);
1428                                 if (ab != null)
1429                                         return ab;
1430                         }
1431                         return null;
1432                 }
1433
1434                 public virtual Type MakeGenericType (params Type[] typeArguments)
1435                 {
1436                         if (IsUserType)
1437                                 throw new NotSupportedException ();
1438                         if (!IsGenericTypeDefinition)
1439                                 throw new InvalidOperationException ("not a generic type definition");
1440                         if (typeArguments == null)
1441                                 throw new ArgumentNullException ("typeArguments");
1442                         if (GetGenericArguments().Length != typeArguments.Length)
1443                                 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");
1444
1445                         bool hasUserType = false;
1446
1447                         Type[] systemTypes = new Type[typeArguments.Length];
1448                         for (int i = 0; i < typeArguments.Length; ++i) {
1449                                 Type t = typeArguments [i];
1450                                 if (t == null)
1451                                         throw new ArgumentNullException ("typeArguments");
1452
1453                                 if (!(t is MonoType))
1454                                         hasUserType = true;
1455                                 systemTypes [i] = t;
1456                         }
1457
1458                         if (hasUserType) {
1459                                 return new MonoGenericClass (this, typeArguments);
1460                         }
1461
1462                         Type res = MakeGenericType (this, systemTypes);
1463                         if (res == null)
1464                                 throw new TypeLoadException ();
1465                         return res;
1466                 }
1467
1468                 public virtual bool IsGenericParameter {
1469                         get {
1470                                 return false;
1471                         }
1472                 }
1473
1474                 public bool IsNested {
1475                         get {
1476                                 return DeclaringType != null;
1477                         }
1478                 }
1479
1480                 public bool IsVisible {
1481                         get {
1482                                 if (IsNestedPublic)
1483                                         return DeclaringType.IsVisible;
1484
1485                                 return IsPublic;
1486                         }
1487                 }
1488
1489                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1490                 extern int GetGenericParameterPosition ();
1491
1492                 public virtual int GenericParameterPosition {
1493                         get {
1494                                 int res = GetGenericParameterPosition ();
1495                                 if (res < 0)
1496                                         throw new InvalidOperationException ();
1497                                 return res;
1498                         }
1499                 }
1500
1501                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1502                 extern GenericParameterAttributes GetGenericParameterAttributes ();
1503
1504                 public virtual GenericParameterAttributes GenericParameterAttributes {
1505                         get {
1506                                 if (!IsSystemType)
1507                                         throw new NotSupportedException ("Derived classes must provide an implementation.");
1508
1509                                 if (!IsGenericParameter)
1510                                         throw new InvalidOperationException ();
1511
1512                                 return GetGenericParameterAttributes ();
1513                         }
1514                 }
1515
1516                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1517                 extern Type[] GetGenericParameterConstraints_impl ();
1518
1519                 public virtual Type[] GetGenericParameterConstraints ()
1520                 {
1521                         if (!IsSystemType)
1522                                 throw new InvalidOperationException ();
1523
1524                         if (!IsGenericParameter)
1525                                 throw new InvalidOperationException ();
1526
1527                         return GetGenericParameterConstraints_impl ();
1528                 }
1529
1530                 public virtual MethodBase DeclaringMethod {
1531                         get {
1532                                 return null;
1533                         }
1534                 }
1535
1536                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1537                 extern Type make_array_type (int rank);
1538
1539                 public virtual Type MakeArrayType ()
1540                 {
1541                         if (!IsSystemType)
1542                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
1543                         return make_array_type (0);
1544                 }
1545
1546                 public virtual Type MakeArrayType (int rank)
1547                 {
1548                         if (!IsSystemType)
1549                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
1550                         if (rank < 1 || rank > 255)
1551                                 throw new IndexOutOfRangeException ();
1552                         return make_array_type (rank);
1553                 }
1554
1555                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1556                 extern Type make_byref_type ();
1557
1558                 public virtual Type MakeByRefType ()
1559                 {
1560                         if (!IsSystemType)
1561                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
1562                         if (IsByRef)
1563                                 throw new TypeLoadException ("Can not call MakeByRefType on a ByRef type");
1564                         return make_byref_type ();
1565                 }
1566
1567                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1568                 static extern Type MakePointerType (Type type);
1569
1570                 public virtual Type MakePointerType ()
1571                 {
1572                         if (!IsSystemType)
1573                                 throw new NotSupportedException ("Derived classes must provide an implementation.");
1574                         return MakePointerType (this);
1575                 }
1576
1577                 public static Type ReflectionOnlyGetType (string typeName,
1578                                                           bool throwIfNotFound,
1579                                                           bool ignoreCase)
1580                 {
1581                         if (typeName == null)
1582                                 throw new ArgumentNullException ("typeName");
1583                         int idx = typeName.IndexOf (',');
1584                         if (idx < 0 || idx == 0 || idx == typeName.Length - 1)
1585                                 throw new ArgumentException ("Assembly qualifed type name is required", "typeName");
1586                         string an = typeName.Substring (idx + 1);
1587                         Assembly a;
1588                         try {
1589                                 a = Assembly.ReflectionOnlyLoad (an);
1590                         } catch {
1591                                 if (throwIfNotFound)
1592                                         throw;
1593                                 return null;
1594                         }
1595                         return a.GetType (typeName.Substring (0, idx), throwIfNotFound, ignoreCase);
1596                 }
1597
1598                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1599                 extern void GetPacking (out int packing, out int size);
1600
1601                 public virtual StructLayoutAttribute StructLayoutAttribute {
1602                         get {
1603 #if NET_4_0
1604                                 throw new NotSupportedException ();
1605 #else
1606                                 return GetStructLayoutAttribute ();
1607 #endif
1608                         }
1609                 }
1610
1611                 internal StructLayoutAttribute GetStructLayoutAttribute ()
1612                 {
1613                         LayoutKind kind;
1614
1615                         if (IsLayoutSequential)
1616                                 kind = LayoutKind.Sequential;
1617                         else if (IsExplicitLayout)
1618                                 kind = LayoutKind.Explicit;
1619                         else
1620                                 kind = LayoutKind.Auto;
1621
1622                         StructLayoutAttribute attr = new StructLayoutAttribute (kind);
1623
1624                         if (IsUnicodeClass)
1625                                 attr.CharSet = CharSet.Unicode;
1626                         else if (IsAnsiClass)
1627                                 attr.CharSet = CharSet.Ansi;
1628                         else
1629                                 attr.CharSet = CharSet.Auto;
1630
1631                         if (kind != LayoutKind.Auto) {
1632                                 int packing;
1633                                 GetPacking (out packing, out attr.Size);
1634                                 // 0 means no data provided, we end up with default value
1635                                 if (packing != 0)
1636                                         attr.Pack = packing;
1637                         }
1638
1639                         return attr;
1640                 }
1641
1642                 internal object[] GetPseudoCustomAttributes ()
1643                 {
1644                         int count = 0;
1645
1646                         /* IsSerializable returns true for delegates/enums as well */
1647                         if ((Attributes & TypeAttributes.Serializable) != 0)
1648                                 count ++;
1649                         if ((Attributes & TypeAttributes.Import) != 0)
1650                                 count ++;
1651
1652                         if (count == 0)
1653                                 return null;
1654                         object[] attrs = new object [count];
1655                         count = 0;
1656
1657                         if ((Attributes & TypeAttributes.Serializable) != 0)
1658                                 attrs [count ++] = new SerializableAttribute ();
1659                         if ((Attributes & TypeAttributes.Import) != 0)
1660                                 attrs [count ++] = new ComImportAttribute ();
1661
1662                         return attrs;
1663                 }
1664
1665
1666 #if NET_4_0
1667                 public virtual bool IsEquivalentTo (Type other)
1668                 {
1669                         return this == other;
1670                 }
1671 #endif
1672
1673                 /*
1674                  * Return whenever this object is an instance of a user defined subclass
1675                  * of System.Type or an instance of TypeDelegator.
1676                  */
1677                 internal bool IsUserType {
1678                         get {
1679                                 /*
1680                                  * subclasses cannot modify _impl so if it is zero, it means the
1681                                  * type is not created by the runtime.
1682                                  */
1683                                 return _impl.Value == IntPtr.Zero &&
1684                                         (GetType ().Assembly != typeof (Type).Assembly || GetType () == typeof (TypeDelegator));
1685                         }
1686                 }
1687
1688                 void _Type.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
1689                 {
1690                         throw new NotImplementedException ();
1691                 }
1692
1693                 void _Type.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
1694                 {
1695                         throw new NotImplementedException ();
1696                 }
1697
1698                 void _Type.GetTypeInfoCount (out uint pcTInfo)
1699                 {
1700                         throw new NotImplementedException ();
1701                 }
1702
1703                 void _Type.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
1704                 {
1705                         throw new NotImplementedException ();
1706                 }
1707         }
1708 }