mcs/class/corlib/System.Reflection.Emit/MethodBuilder.cs

   1 //
   2 // System.Reflection.Emit/MethodBuilder.cs
   3 //
   4 // Author:
   5 //   Paolo Molaro (lupus@ximian.com)
   6 //
   7 // (C) 2001 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 #if !FULL_AOT_RUNTIME
  34 using System;
  35 using System.Reflection;
  36 using System.Reflection.Emit;
  37 using System.Globalization;
  38 using System.Security;
  39 using System.Security.Permissions;
  40 using System.Runtime.CompilerServices;
  41 using System.Runtime.InteropServices;
  42 using System.Diagnostics.SymbolStore;
  43
  44 namespace System.Reflection.Emit
  45 {
  46         [ComVisible (true)]
  47         [ComDefaultInterface (typeof (_MethodBuilder))]
  48         [ClassInterface (ClassInterfaceType.None)]
  49         [StructLayout (LayoutKind.Sequential)]
  50         public sealed class MethodBuilder : MethodInfo, _MethodBuilder
  51         {
  52 #pragma warning disable 169, 414
  53                 private RuntimeMethodHandle mhandle;
  54                 private Type rtype;
  55                 internal Type[] parameters;
  56                 private MethodAttributes attrs; /* It's used directly by MCS */
  57                 private MethodImplAttributes iattrs;
  58                 private string name;
  59                 private int table_idx;
  60                 private byte[] code;
  61                 private ILGenerator ilgen;
  62                 private TypeBuilder type;
  63                 internal ParameterBuilder[] pinfo;
  64                 private CustomAttributeBuilder[] cattrs;
  65                 private MethodInfo[] override_methods;
  66                 private string pi_dll;
  67                 private string pi_entry;
  68                 private CharSet charset;
  69                 private uint extra_flags; /* this encodes set_last_error etc */
  70                 private CallingConvention native_cc;
  71                 private CallingConventions call_conv;
  72                 private bool init_locals = true;
  73                 private IntPtr generic_container;
  74                 internal GenericTypeParameterBuilder[] generic_params;
  75                 private Type[] returnModReq;
  76                 private Type[] returnModOpt;
  77                 private Type[][] paramModReq;
  78                 private Type[][] paramModOpt;
  79                 private RefEmitPermissionSet[] permissions;
  80 #pragma warning restore 169, 414
  81
  82                 internal MethodBuilder (TypeBuilder tb, string name, MethodAttributes attributes, CallingConventions callingConvention, Type returnType, Type[] returnModReq, Type[] returnModOpt, Type[] parameterTypes, Type[][] paramModReq, Type[][] paramModOpt)
  83                 {
  84                         this.name = name;
  85                         this.attrs = attributes;
  86                         this.call_conv = callingConvention;
  87                         this.rtype = returnType;
  88                         this.returnModReq = returnModReq;
  89                         this.returnModOpt = returnModOpt;
  90                         this.paramModReq = paramModReq;
  91                         this.paramModOpt = paramModOpt;
  92                         // The MSDN docs does not specify this, but the MS MethodBuilder
  93                         // appends a HasThis flag if the method is not static
  94                         if ((attributes & MethodAttributes.Static) == 0)
  95                                 this.call_conv |= CallingConventions.HasThis;
  96                         if (parameterTypes != null) {
  97                                 for (int i = 0; i < parameterTypes.Length; ++i)
  98                                         if (parameterTypes [i] == null)
  99                                                 throw new ArgumentException ("Elements of the parameterTypes array cannot be null", "parameterTypes");
 100
 101                                 this.parameters = new Type [parameterTypes.Length];
 102                                 System.Array.Copy (parameterTypes, this.parameters, parameterTypes.Length);
 103                         }
 104                         type = tb;
 105                         table_idx = get_next_table_index (this, 0x06, true);
 106
 107                         ((ModuleBuilder)tb.Module).RegisterToken (this, GetToken ().Token);
 108                 }
 109
 110                 internal MethodBuilder (TypeBuilder tb, string name, MethodAttributes attributes,
 111                                                                 CallingConventions callingConvention, Type returnType, Type[] returnModReq, Type[] returnModOpt, Type[] parameterTypes, Type[][] paramModReq, Type[][] paramModOpt,
 112                         String dllName, String entryName, CallingConvention nativeCConv, CharSet nativeCharset)
 113                         : this (tb, name, attributes, callingConvention, returnType, returnModReq, returnModOpt, parameterTypes, paramModReq, paramModOpt)
 114                 {
 115                         pi_dll = dllName;
 116                         pi_entry = entryName;
 117                         native_cc = nativeCConv;
 118                         charset = nativeCharset;
 119                 }
 120
 121                 public override bool ContainsGenericParameters {
 122                         get { throw new NotSupportedException (); }
 123                 }
 124
 125                 public bool InitLocals {
 126                         get {return init_locals;}
 127                         set {init_locals = value;}
 128                 }
 129
 130                 internal TypeBuilder TypeBuilder {
 131                         get {return type;}
 132                 }
 133
 134                 public override RuntimeMethodHandle MethodHandle {
 135                         get {
 136                                 throw NotSupported ();
 137                         }
 138                 }
 139
 140                 public override Type ReturnType {
 141                         get { return rtype; }
 142                 }
 143
 144                 public override Type ReflectedType {
 145                         get { return type; }
 146                 }
 147
 148                 public override Type DeclaringType {
 149                         get { return type; }
 150                 }
 151
 152                 public override string Name {
 153                         get { return name; }
 154                 }
 155
 156                 public override MethodAttributes Attributes {
 157                         get { return attrs; }
 158                 }
 159
 160                 public override ICustomAttributeProvider ReturnTypeCustomAttributes {
 161                         get { return null; }
 162                 }
 163
 164                 public override CallingConventions CallingConvention {
 165                         get { return call_conv; }
 166                 }
 167
 168                 [MonoTODO("Not implemented")]
 169                 public string Signature {
 170                         get {
 171                                 throw new NotImplementedException ();
 172                         }
 173                 }
 174
 175                 /* Used by mcs */
 176                 internal bool BestFitMapping {
 177                         set {
 178                                 extra_flags = (uint) ((extra_flags & ~0x30) | (uint)(value ? 0x10 : 0x20));
 179                         }
 180                 }
 181
 182                 /* Used by mcs */
 183                 internal bool ThrowOnUnmappableChar {
 184                         set {
 185                                 extra_flags = (uint) ((extra_flags & ~0x3000) | (uint)(value ? 0x1000 : 0x2000));
 186                         }
 187                 }
 188
 189                 /* Used by mcs */
 190                 internal bool ExactSpelling {
 191                         set {
 192                                 extra_flags = (uint) ((extra_flags & ~0x01) | (uint)(value ? 0x01 : 0x00));
 193                         }
 194                 }
 195
 196                 /* Used by mcs */
 197                 internal bool SetLastError {
 198                         set {
 199                                 extra_flags = (uint) ((extra_flags & ~0x40) | (uint)(value ? 0x40 : 0x00));
 200                         }
 201                 }
 202
 203                 public MethodToken GetToken()
 204                 {
 205                         return new MethodToken(0x06000000 | table_idx);
 206                 }
 207
 208                 public override MethodInfo GetBaseDefinition()
 209                 {
 210                         return this;
 211                 }
 212
 213                 public override MethodImplAttributes GetMethodImplementationFlags()
 214                 {
 215                         return iattrs;
 216                 }
 217
 218                 public override ParameterInfo[] GetParameters()
 219                 {
 220                         if (!type.is_created)
 221                                 throw NotSupported ();
 222                         if (parameters == null)
 223                                 return null;
 224
 225                         ParameterInfo[] retval = new ParameterInfo [parameters.Length];
 226                         for (int i = 0; i < parameters.Length; i++) {
 227                                 retval [i] = new ParameterInfo (pinfo == null ? null : pinfo [i + 1], parameters [i], this, i + 1);
 228                         }
 229                         return retval;
 230                 }
 231
 232                 internal override int GetParameterCount ()
 233                 {
 234                         if (parameters == null)
 235                                 return 0;
 236
 237                         return parameters.Length;
 238                 }
 239
 240                 internal override Type GetParameterType (int pos) {
 241                         return parameters [pos];
 242                 }
 243
 244                 public Module GetModule ()
 245                 {
 246                         return type.Module;
 247                 }
 248
 249                 public void CreateMethodBody (byte[] il, int count)
 250                 {
 251                         if ((il != null) && ((count < 0) || (count > il.Length)))
 252                                 throw new ArgumentOutOfRangeException ("Index was out of range.  Must be non-negative and less than the size of the collection.");
 253
 254                         if ((code != null) || type.is_created)
 255                                 throw new InvalidOperationException ("Type definition of the method is complete.");
 256
 257                         if (il == null)
 258                                 code = null;
 259                         else {
 260                                 code = new byte [count];
 261                                 System.Array.Copy(il, code, count);
 262                         }
 263                 }
 264
 265                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 266                 {
 267                         throw NotSupported ();
 268                 }
 269
 270                 public override bool IsDefined (Type attributeType, bool inherit)
 271                 {
 272                         throw NotSupported ();
 273                 }
 274
 275                 public override object[] GetCustomAttributes (bool inherit)
 276                 {
 277                         /*
 278                          * On MS.NET, this always returns not_supported, but we can't do this
 279                          * since there would be no way to obtain custom attributes of
 280                          * dynamically created ctors.
 281                          */
 282                         if (type.is_created)
 283                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 284                         else
 285                                 throw NotSupported ();
 286                 }
 287
 288                 public override object[] GetCustomAttributes (Type attributeType, bool inherit)
 289                 {
 290                         if (type.is_created)
 291                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 292                         else
 293                                 throw NotSupported ();
 294                 }
 295
 296                 public ILGenerator GetILGenerator ()
 297                 {
 298                         return GetILGenerator (64);
 299                 }
 300
 301                 public ILGenerator GetILGenerator (int size)
 302                 {
 303                         if (((iattrs & MethodImplAttributes.CodeTypeMask) !=
 304                                  MethodImplAttributes.IL) ||
 305                                 ((iattrs & MethodImplAttributes.ManagedMask) !=
 306                                  MethodImplAttributes.Managed))
 307                                 throw new InvalidOperationException ("Method body should not exist.");
 308                         if (ilgen != null)
 309                                 return ilgen;
 310                         ilgen = new ILGenerator (type.Module, ((ModuleBuilder)type.Module).GetTokenGenerator (), size);
 311                         return ilgen;
 312                 }
 313
 314                 public ParameterBuilder DefineParameter (int position, ParameterAttributes attributes, string strParamName)
 315                 {
 316                         RejectIfCreated ();
 317
 318                         //
 319                         // Extension: Mono allows position == 0 for the return attribute
 320                         //
 321                         if ((position < 0) || (position > parameters.Length))
 322                                 throw new ArgumentOutOfRangeException ("position");
 323
 324                         ParameterBuilder pb = new ParameterBuilder (this, position, attributes, strParamName);
 325                         if (pinfo == null)
 326                                 pinfo = new ParameterBuilder [parameters.Length + 1];
 327                         pinfo [position] = pb;
 328                         return pb;
 329                 }
 330
 331                 internal void check_override ()
 332                 {
 333                         if (override_methods != null) {
 334                                 foreach (var m in override_methods) {
 335                                         if (m.IsVirtual && !IsVirtual)
 336                                                 throw new TypeLoadException (String.Format("Method '{0}' override '{1}' but it is not virtual", name, m));
 337                                 }
 338                         }
 339                 }
 340
 341                 internal void fixup ()
 342                 {
 343                         if (((attrs & (MethodAttributes.Abstract | MethodAttributes.PinvokeImpl)) == 0) && ((iattrs & (MethodImplAttributes.Runtime | MethodImplAttributes.InternalCall)) == 0)) {
 344                                 // do not allow zero length method body on MS.NET 2.0 (and higher)
 345                                 if (((ilgen == null) || (ilgen.ILOffset == 0)) && (code == null || code.Length == 0))
 346                                         throw new InvalidOperationException (
 347                                                                              String.Format ("Method '{0}.{1}' does not have a method body.",
 348                                                                                             DeclaringType.FullName, Name));
 349                         }
 350                         if (ilgen != null)
 351                                 ilgen.label_fixup ();
 352                 }
 353
 354                 internal void GenerateDebugInfo (ISymbolWriter symbolWriter)
 355                 {
 356                         if (ilgen != null && ilgen.HasDebugInfo) {
 357                                 SymbolToken token = new SymbolToken (GetToken().Token);
 358                                 symbolWriter.OpenMethod (token);
 359                                 symbolWriter.SetSymAttribute (token, "__name", System.Text.Encoding.UTF8.GetBytes (Name));
 360                                 ilgen.GenerateDebugInfo (symbolWriter);
 361                                 symbolWriter.CloseMethod ();
 362                         }
 363                 }
 364
 365                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder)
 366                 {
 367                         if (customBuilder == null)
 368                                 throw new ArgumentNullException ("customBuilder");
 369
 370                         switch (customBuilder.Ctor.ReflectedType.FullName) {
 371                                 case "System.Runtime.CompilerServices.MethodImplAttribute":
 372                                         byte[] data = customBuilder.Data;
 373                                         int impla; // the (stupid) ctor takes a short or an int ...
 374                                         impla = (int)data [2];
 375                                         impla |= ((int)data [3]) << 8;
 376                                         iattrs |= (MethodImplAttributes)impla;
 377                                         return;
 378
 379                                 case "System.Runtime.InteropServices.DllImportAttribute":
 380                                         CustomAttributeBuilder.CustomAttributeInfo attr = CustomAttributeBuilder.decode_cattr (customBuilder);
 381                                         bool preserveSig = true;
 382
 383                                         /*
 384                                          * It would be easier to construct a DllImportAttribute from
 385                                          * the custom attribute builder, but the DllImportAttribute
 386                                          * does not contain all the information required here, ie.
 387                                          * - some parameters, like BestFitMapping has three values
 388                                          *   ("on", "off", "missing"), but DllImportAttribute only
 389                                          *   contains two (on/off).
 390                                          * - PreserveSig is true by default, while it is false by
 391                                          *   default in DllImportAttribute.
 392                                          */
 393
 394                                         pi_dll = (string)attr.ctorArgs[0];
 395                                         if (pi_dll == null || pi_dll.Length == 0)
 396                                                 throw new ArgumentException ("DllName cannot be empty");
 397
 398                                         native_cc = System.Runtime.InteropServices.CallingConvention.Winapi;
 399
 400                                         for (int i = 0; i < attr.namedParamNames.Length; ++i) {
 401                                                 string name = attr.namedParamNames [i];
 402                                                 object value = attr.namedParamValues [i];
 403
 404                                                 if (name == "CallingConvention")
 405                                                         native_cc = (CallingConvention)value;
 406                                                 else if (name == "CharSet")
 407                                                         charset = (CharSet)value;
 408                                                 else if (name == "EntryPoint")
 409                                                         pi_entry = (string)value;
 410                                                 else if (name == "ExactSpelling")
 411                                                         ExactSpelling = (bool)value;
 412                                                 else if (name == "SetLastError")
 413                                                         SetLastError = (bool)value;
 414                                                 else if (name == "PreserveSig")
 415                                                         preserveSig = (bool)value;
 416                                         else if (name == "BestFitMapping")
 417                                                 BestFitMapping = (bool)value;
 418                                         else if (name == "ThrowOnUnmappableChar")
 419                                                 ThrowOnUnmappableChar = (bool)value;
 420                                         }
 421
 422                                         attrs |= MethodAttributes.PinvokeImpl;
 423                                         if (preserveSig)
 424                                                 iattrs |= MethodImplAttributes.PreserveSig;
 425                                         return;
 426
 427                                 case "System.Runtime.InteropServices.PreserveSigAttribute":
 428                                         iattrs |= MethodImplAttributes.PreserveSig;
 429                                         return;
 430                                 case "System.Runtime.CompilerServices.SpecialNameAttribute":
 431                                         attrs |= MethodAttributes.SpecialName;
 432                                         return;
 433                                 case "System.Security.SuppressUnmanagedCodeSecurityAttribute":
 434                                         attrs |= MethodAttributes.HasSecurity;
 435                                         break;
 436                         }
 437
 438                         if (cattrs != null) {
 439                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 440                                 cattrs.CopyTo (new_array, 0);
 441                                 new_array [cattrs.Length] = customBuilder;
 442                                 cattrs = new_array;
 443                         } else {
 444                                 cattrs = new CustomAttributeBuilder [1];
 445                                 cattrs [0] = customBuilder;
 446                         }
 447                 }
 448
 449                 [ComVisible (true)]
 450                 public void SetCustomAttribute (ConstructorInfo con, byte[] binaryAttribute)
 451                 {
 452                         if (con == null)
 453                                 throw new ArgumentNullException ("con");
 454                         if (binaryAttribute == null)
 455                                 throw new ArgumentNullException ("binaryAttribute");
 456                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 457                 }
 458
 459                 public void SetImplementationFlags (MethodImplAttributes attributes)
 460                 {
 461                         RejectIfCreated ();
 462                         iattrs = attributes;
 463                 }
 464
 465                 public void AddDeclarativeSecurity (SecurityAction action, PermissionSet pset)
 466                 {
 467 #if !NET_2_1
 468                         if (pset == null)
 469                                 throw new ArgumentNullException ("pset");
 470                         if ((action == SecurityAction.RequestMinimum) ||
 471                                 (action == SecurityAction.RequestOptional) ||
 472                                 (action == SecurityAction.RequestRefuse))
 473                                 throw new ArgumentOutOfRangeException ("Request* values are not permitted", "action");
 474
 475                         RejectIfCreated ();
 476
 477                         if (permissions != null) {
 478                                 /* Check duplicate actions */
 479                                 foreach (RefEmitPermissionSet set in permissions)
 480                                         if (set.action == action)
 481                                                 throw new InvalidOperationException ("Multiple permission sets specified with the same SecurityAction.");
 482
 483                                 RefEmitPermissionSet[] new_array = new RefEmitPermissionSet [permissions.Length + 1];
 484                                 permissions.CopyTo (new_array, 0);
 485                                 permissions = new_array;
 486                         }
 487                         else
 488                                 permissions = new RefEmitPermissionSet [1];
 489
 490                         permissions [permissions.Length - 1] = new RefEmitPermissionSet (action, pset.ToXml ().ToString ());
 491                         attrs |= MethodAttributes.HasSecurity;
 492 #endif
 493                 }
 494
 495                 [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
 496                 public void SetMarshal (UnmanagedMarshal unmanagedMarshal)
 497                 {
 498                         RejectIfCreated ();
 499                         throw new NotImplementedException ();
 500                 }
 501
 502                 [MonoTODO]
 503                 public void SetSymCustomAttribute (string name, byte[] data)
 504                 {
 505                         RejectIfCreated ();
 506                         throw new NotImplementedException ();
 507                 }
 508
 509                 public override string ToString()
 510                 {
 511                         return "MethodBuilder [" + type.Name + "::" + name + "]";
 512                 }
 513
 514                 [MonoTODO]
 515                 public override bool Equals (object obj)
 516                 {
 517                         return base.Equals (obj);
 518                 }
 519
 520                 public override int GetHashCode ()
 521                 {
 522                         return name.GetHashCode ();
 523                 }
 524
 525                 internal override int get_next_table_index (object obj, int table, bool inc)
 526                 {
 527                         return type.get_next_table_index (obj, table, inc);
 528                 }
 529
 530                 void ExtendArray<T> (ref T[] array, T elem) {
 531                         if (array == null) {
 532                                 array = new T [1];
 533                         } else {
 534                                 var newa = new T [array.Length + 1];
 535                                 Array.Copy (array, newa, array.Length);
 536                                 array = newa;
 537                         }
 538                         array [array.Length - 1] = elem;
 539                 }
 540
 541                 internal void set_override (MethodInfo mdecl)
 542                 {
 543                         ExtendArray<MethodInfo> (ref override_methods, mdecl);
 544                 }
 545
 546                 private void RejectIfCreated ()
 547                 {
 548                         if (type.is_created)
 549                                 throw new InvalidOperationException ("Type definition of the method is complete.");
 550                 }
 551
 552                 private Exception NotSupported ()
 553                 {
 554                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 555                 }
 556
 557                 public override MethodInfo MakeGenericMethod (params Type [] typeArguments)
 558                 {
 559                         if (!IsGenericMethodDefinition)
 560                                 throw new InvalidOperationException ("Method is not a generic method definition");
 561                         if (typeArguments == null)
 562                                 throw new ArgumentNullException ("typeArguments");
 563                         if (generic_params.Length != typeArguments.Length)
 564                                 throw new ArgumentException ("Incorrect length", "typeArguments");
 565                         foreach (Type type in typeArguments) {
 566                                 if (type == null)
 567                                         throw new ArgumentNullException ("typeArguments");
 568                         }
 569
 570                         return new MethodOnTypeBuilderInst (this, typeArguments);
 571                 }
 572
 573                 public override bool IsGenericMethodDefinition {
 574                         get {
 575                                 return generic_params != null;
 576                         }
 577                 }
 578
 579                 public override bool IsGenericMethod {
 580                         get {
 581                                 return generic_params != null;
 582                         }
 583                 }
 584
 585                 public override MethodInfo GetGenericMethodDefinition ()
 586                 {
 587                         if (!IsGenericMethodDefinition)
 588                                 throw new InvalidOperationException ();
 589
 590                         return this;
 591                 }
 592
 593                 public override Type[] GetGenericArguments ()
 594                 {
 595                         if (generic_params == null)
 596                                 return null;
 597
 598                         Type[] result = new Type [generic_params.Length];
 599                         for (int i = 0; i < generic_params.Length; i++)
 600                                 result [i] = generic_params [i];
 601
 602                         return result;
 603                 }
 604
 605                 public GenericTypeParameterBuilder[] DefineGenericParameters (params string[] names)
 606                 {
 607                         if (names == null)
 608                                 throw new ArgumentNullException ("names");
 609                         if (names.Length == 0)
 610                                 throw new ArgumentException ("names");
 611
 612                         generic_params = new GenericTypeParameterBuilder [names.Length];
 613                         for (int i = 0; i < names.Length; i++) {
 614                                 string item = names [i];
 615                                 if (item == null)
 616                                         throw new ArgumentNullException ("names");
 617                                 generic_params [i] = new GenericTypeParameterBuilder (type, this, item, i);
 618                         }
 619
 620                         return generic_params;
 621                 }
 622
 623                 public void SetReturnType (Type returnType)
 624                 {
 625                         rtype = returnType;
 626                 }
 627
 628                 public void SetParameters (params Type[] parameterTypes)
 629                 {
 630                         if (parameterTypes != null) {
 631                                 for (int i = 0; i < parameterTypes.Length; ++i)
 632                                         if (parameterTypes [i] == null)
 633                                                 throw new ArgumentException ("Elements of the parameterTypes array cannot be null", "parameterTypes");
 634
 635                                 this.parameters = new Type [parameterTypes.Length];
 636                                 System.Array.Copy (parameterTypes, this.parameters, parameterTypes.Length);
 637                         }
 638                 }
 639
 640                 public void SetSignature (Type returnType, Type[] returnTypeRequiredCustomModifiers, Type[] returnTypeOptionalCustomModifiers, Type[] parameterTypes, Type[][] parameterTypeRequiredCustomModifiers, Type[][] parameterTypeOptionalCustomModifiers)
 641                 {
 642                         SetReturnType (returnType);
 643                         SetParameters (parameterTypes);
 644                         this.returnModReq = returnTypeRequiredCustomModifiers;
 645                         this.returnModOpt = returnTypeOptionalCustomModifiers;
 646                         this.paramModReq = parameterTypeRequiredCustomModifiers;
 647                         this.paramModOpt = parameterTypeOptionalCustomModifiers;
 648                 }
 649
 650                 public override Module Module {
 651                         get {
 652                                 return base.Module;
 653                         }
 654                 }
 655
 656                 void _MethodBuilder.GetIDsOfNames([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 657                 {
 658                         throw new NotImplementedException ();
 659                 }
 660
 661                 void _MethodBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 662                 {
 663                         throw new NotImplementedException ();
 664                 }
 665
 666                 void _MethodBuilder.GetTypeInfoCount (out uint pcTInfo)
 667                 {
 668                         throw new NotImplementedException ();
 669                 }
 670
 671                 void _MethodBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 672                 {
 673                         throw new NotImplementedException ();
 674                 }
 675
 676 #if NET_4_0 || MOONLIGHT
 677                 public override ParameterInfo ReturnParameter {
 678                         get { return base.ReturnParameter; }
 679                 }
 680 #endif
 681         }
 682 }
 683 #endif