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
 223                         return GetParametersInternal ();
 224                 }
 225
 226                 internal override ParameterInfo[] GetParametersInternal ()
 227                 {
 228                         if (parameters == null)
 229                                 return null;
 230
 231                         ParameterInfo[] retval = new ParameterInfo [parameters.Length];
 232                         for (int i = 0; i < parameters.Length; i++) {
 233                                 retval [i] = ParameterInfo.New (pinfo == null ? null : pinfo [i + 1], parameters [i], this, i + 1);
 234                         }
 235                         return retval;
 236                 }
 237
 238                 internal override int GetParametersCount ()
 239                 {
 240                         if (parameters == null)
 241                                 return 0;
 242
 243                         return parameters.Length;
 244                 }
 245
 246                 internal override Type GetParameterType (int pos) {
 247                         return parameters [pos];
 248                 }
 249
 250                 public Module GetModule ()
 251                 {
 252                         return type.Module;
 253                 }
 254
 255                 public void CreateMethodBody (byte[] il, int count)
 256                 {
 257                         if ((il != null) && ((count < 0) || (count > il.Length)))
 258                                 throw new ArgumentOutOfRangeException ("Index was out of range.  Must be non-negative and less than the size of the collection.");
 259
 260                         if ((code != null) || type.is_created)
 261                                 throw new InvalidOperationException ("Type definition of the method is complete.");
 262
 263                         if (il == null)
 264                                 code = null;
 265                         else {
 266                                 code = new byte [count];
 267                                 System.Array.Copy(il, code, count);
 268                         }
 269                 }
 270
 271                 public override Object Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
 272                 {
 273                         throw NotSupported ();
 274                 }
 275
 276                 public override bool IsDefined (Type attributeType, bool inherit)
 277                 {
 278                         throw NotSupported ();
 279                 }
 280
 281                 public override object[] GetCustomAttributes (bool inherit)
 282                 {
 283                         /*
 284                          * On MS.NET, this always returns not_supported, but we can't do this
 285                          * since there would be no way to obtain custom attributes of
 286                          * dynamically created ctors.
 287                          */
 288                         if (type.is_created)
 289                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 290                         else
 291                                 throw NotSupported ();
 292                 }
 293
 294                 public override object[] GetCustomAttributes (Type attributeType, bool inherit)
 295                 {
 296                         if (type.is_created)
 297                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 298                         else
 299                                 throw NotSupported ();
 300                 }
 301
 302                 public ILGenerator GetILGenerator ()
 303                 {
 304                         return GetILGenerator (64);
 305                 }
 306
 307                 public ILGenerator GetILGenerator (int size)
 308                 {
 309                         if (((iattrs & MethodImplAttributes.CodeTypeMask) !=
 310                                  MethodImplAttributes.IL) ||
 311                                 ((iattrs & MethodImplAttributes.ManagedMask) !=
 312                                  MethodImplAttributes.Managed))
 313                                 throw new InvalidOperationException ("Method body should not exist.");
 314                         if (ilgen != null)
 315                                 return ilgen;
 316                         ilgen = new ILGenerator (type.Module, ((ModuleBuilder)type.Module).GetTokenGenerator (), size);
 317                         return ilgen;
 318                 }
 319
 320                 public ParameterBuilder DefineParameter (int position, ParameterAttributes attributes, string strParamName)
 321                 {
 322                         RejectIfCreated ();
 323
 324                         //
 325                         // Extension: Mono allows position == 0 for the return attribute
 326                         //
 327                         if ((position < 0) || (position > parameters.Length))
 328                                 throw new ArgumentOutOfRangeException ("position");
 329
 330                         ParameterBuilder pb = new ParameterBuilder (this, position, attributes, strParamName);
 331                         if (pinfo == null)
 332                                 pinfo = new ParameterBuilder [parameters.Length + 1];
 333                         pinfo [position] = pb;
 334                         return pb;
 335                 }
 336
 337                 internal void check_override ()
 338                 {
 339                         if (override_methods != null) {
 340                                 foreach (var m in override_methods) {
 341                                         if (m.IsVirtual && !IsVirtual)
 342                                                 throw new TypeLoadException (String.Format("Method '{0}' override '{1}' but it is not virtual", name, m));
 343                                 }
 344                         }
 345                 }
 346
 347                 internal void fixup ()
 348                 {
 349                         if (((attrs & (MethodAttributes.Abstract | MethodAttributes.PinvokeImpl)) == 0) && ((iattrs & (MethodImplAttributes.Runtime | MethodImplAttributes.InternalCall)) == 0)) {
 350                                 // do not allow zero length method body on MS.NET 2.0 (and higher)
 351                                 if (((ilgen == null) || (ilgen.ILOffset == 0)) && (code == null || code.Length == 0))
 352                                         throw new InvalidOperationException (
 353                                                                              String.Format ("Method '{0}.{1}' does not have a method body.",
 354                                                                                             DeclaringType.FullName, Name));
 355                         }
 356                         if (ilgen != null)
 357                                 ilgen.label_fixup (this);
 358                 }
 359
 360                 internal void GenerateDebugInfo (ISymbolWriter symbolWriter)
 361                 {
 362                         if (ilgen != null && ilgen.HasDebugInfo) {
 363                                 SymbolToken token = new SymbolToken (GetToken().Token);
 364                                 symbolWriter.OpenMethod (token);
 365                                 symbolWriter.SetSymAttribute (token, "__name", System.Text.Encoding.UTF8.GetBytes (Name));
 366                                 ilgen.GenerateDebugInfo (symbolWriter);
 367                                 symbolWriter.CloseMethod ();
 368                         }
 369                 }
 370
 371                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder)
 372                 {
 373                         if (customBuilder == null)
 374                                 throw new ArgumentNullException ("customBuilder");
 375
 376                         switch (customBuilder.Ctor.ReflectedType.FullName) {
 377                                 case "System.Runtime.CompilerServices.MethodImplAttribute":
 378                                         byte[] data = customBuilder.Data;
 379                                         int impla; // the (stupid) ctor takes a short or an int ...
 380                                         impla = (int)data [2];
 381                                         impla |= ((int)data [3]) << 8;
 382                                         iattrs |= (MethodImplAttributes)impla;
 383                                         return;
 384
 385                                 case "System.Runtime.InteropServices.DllImportAttribute":
 386                                         CustomAttributeBuilder.CustomAttributeInfo attr = CustomAttributeBuilder.decode_cattr (customBuilder);
 387                                         bool preserveSig = true;
 388
 389                                         /*
 390                                          * It would be easier to construct a DllImportAttribute from
 391                                          * the custom attribute builder, but the DllImportAttribute
 392                                          * does not contain all the information required here, ie.
 393                                          * - some parameters, like BestFitMapping has three values
 394                                          *   ("on", "off", "missing"), but DllImportAttribute only
 395                                          *   contains two (on/off).
 396                                          * - PreserveSig is true by default, while it is false by
 397                                          *   default in DllImportAttribute.
 398                                          */
 399
 400                                         pi_dll = (string)attr.ctorArgs[0];
 401                                         if (pi_dll == null || pi_dll.Length == 0)
 402                                                 throw new ArgumentException ("DllName cannot be empty");
 403
 404                                         native_cc = System.Runtime.InteropServices.CallingConvention.Winapi;
 405
 406                                         for (int i = 0; i < attr.namedParamNames.Length; ++i) {
 407                                                 string name = attr.namedParamNames [i];
 408                                                 object value = attr.namedParamValues [i];
 409
 410                                                 if (name == "CallingConvention")
 411                                                         native_cc = (CallingConvention)value;
 412                                                 else if (name == "CharSet")
 413                                                         charset = (CharSet)value;
 414                                                 else if (name == "EntryPoint")
 415                                                         pi_entry = (string)value;
 416                                                 else if (name == "ExactSpelling")
 417                                                         ExactSpelling = (bool)value;
 418                                                 else if (name == "SetLastError")
 419                                                         SetLastError = (bool)value;
 420                                                 else if (name == "PreserveSig")
 421                                                         preserveSig = (bool)value;
 422                                         else if (name == "BestFitMapping")
 423                                                 BestFitMapping = (bool)value;
 424                                         else if (name == "ThrowOnUnmappableChar")
 425                                                 ThrowOnUnmappableChar = (bool)value;
 426                                         }
 427
 428                                         attrs |= MethodAttributes.PinvokeImpl;
 429                                         if (preserveSig)
 430                                                 iattrs |= MethodImplAttributes.PreserveSig;
 431                                         return;
 432
 433                                 case "System.Runtime.InteropServices.PreserveSigAttribute":
 434                                         iattrs |= MethodImplAttributes.PreserveSig;
 435                                         return;
 436                                 case "System.Runtime.CompilerServices.SpecialNameAttribute":
 437                                         attrs |= MethodAttributes.SpecialName;
 438                                         return;
 439                                 case "System.Security.SuppressUnmanagedCodeSecurityAttribute":
 440                                         attrs |= MethodAttributes.HasSecurity;
 441                                         break;
 442                         }
 443
 444                         if (cattrs != null) {
 445                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 446                                 cattrs.CopyTo (new_array, 0);
 447                                 new_array [cattrs.Length] = customBuilder;
 448                                 cattrs = new_array;
 449                         } else {
 450                                 cattrs = new CustomAttributeBuilder [1];
 451                                 cattrs [0] = customBuilder;
 452                         }
 453                 }
 454
 455                 [ComVisible (true)]
 456                 public void SetCustomAttribute (ConstructorInfo con, byte[] binaryAttribute)
 457                 {
 458                         if (con == null)
 459                                 throw new ArgumentNullException ("con");
 460                         if (binaryAttribute == null)
 461                                 throw new ArgumentNullException ("binaryAttribute");
 462                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 463                 }
 464
 465                 public void SetImplementationFlags (MethodImplAttributes attributes)
 466                 {
 467                         RejectIfCreated ();
 468                         iattrs = attributes;
 469                 }
 470
 471                 public void AddDeclarativeSecurity (SecurityAction action, PermissionSet pset)
 472                 {
 473 #if !NET_2_1
 474                         if (pset == null)
 475                                 throw new ArgumentNullException ("pset");
 476                         if ((action == SecurityAction.RequestMinimum) ||
 477                                 (action == SecurityAction.RequestOptional) ||
 478                                 (action == SecurityAction.RequestRefuse))
 479                                 throw new ArgumentOutOfRangeException ("Request* values are not permitted", "action");
 480
 481                         RejectIfCreated ();
 482
 483                         if (permissions != null) {
 484                                 /* Check duplicate actions */
 485                                 foreach (RefEmitPermissionSet set in permissions)
 486                                         if (set.action == action)
 487                                                 throw new InvalidOperationException ("Multiple permission sets specified with the same SecurityAction.");
 488
 489                                 RefEmitPermissionSet[] new_array = new RefEmitPermissionSet [permissions.Length + 1];
 490                                 permissions.CopyTo (new_array, 0);
 491                                 permissions = new_array;
 492                         }
 493                         else
 494                                 permissions = new RefEmitPermissionSet [1];
 495
 496                         permissions [permissions.Length - 1] = new RefEmitPermissionSet (action, pset.ToXml ().ToString ());
 497                         attrs |= MethodAttributes.HasSecurity;
 498 #endif
 499                 }
 500
 501                 [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
 502                 public void SetMarshal (UnmanagedMarshal unmanagedMarshal)
 503                 {
 504                         RejectIfCreated ();
 505                         throw new NotImplementedException ();
 506                 }
 507
 508                 [MonoTODO]
 509                 public void SetSymCustomAttribute (string name, byte[] data)
 510                 {
 511                         RejectIfCreated ();
 512                         throw new NotImplementedException ();
 513                 }
 514
 515                 public override string ToString()
 516                 {
 517                         return "MethodBuilder [" + type.Name + "::" + name + "]";
 518                 }
 519
 520                 [MonoTODO]
 521                 public override bool Equals (object obj)
 522                 {
 523                         return base.Equals (obj);
 524                 }
 525
 526                 public override int GetHashCode ()
 527                 {
 528                         return name.GetHashCode ();
 529                 }
 530
 531                 internal override int get_next_table_index (object obj, int table, bool inc)
 532                 {
 533                         return type.get_next_table_index (obj, table, inc);
 534                 }
 535
 536                 void ExtendArray<T> (ref T[] array, T elem) {
 537                         if (array == null) {
 538                                 array = new T [1];
 539                         } else {
 540                                 var newa = new T [array.Length + 1];
 541                                 Array.Copy (array, newa, array.Length);
 542                                 array = newa;
 543                         }
 544                         array [array.Length - 1] = elem;
 545                 }
 546
 547                 internal void set_override (MethodInfo mdecl)
 548                 {
 549                         ExtendArray<MethodInfo> (ref override_methods, mdecl);
 550                 }
 551
 552                 private void RejectIfCreated ()
 553                 {
 554                         if (type.is_created)
 555                                 throw new InvalidOperationException ("Type definition of the method is complete.");
 556                 }
 557
 558                 private Exception NotSupported ()
 559                 {
 560                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 561                 }
 562
 563                 public override MethodInfo MakeGenericMethod (params Type [] typeArguments)
 564                 {
 565                         if (!IsGenericMethodDefinition)
 566                                 throw new InvalidOperationException ("Method is not a generic method definition");
 567                         if (typeArguments == null)
 568                                 throw new ArgumentNullException ("typeArguments");
 569                         if (generic_params.Length != typeArguments.Length)
 570                                 throw new ArgumentException ("Incorrect length", "typeArguments");
 571                         foreach (Type type in typeArguments) {
 572                                 if (type == null)
 573                                         throw new ArgumentNullException ("typeArguments");
 574                         }
 575
 576                         return new MethodOnTypeBuilderInst (this, typeArguments);
 577                 }
 578
 579                 public override bool IsGenericMethodDefinition {
 580                         get {
 581                                 return generic_params != null;
 582                         }
 583                 }
 584
 585                 public override bool IsGenericMethod {
 586                         get {
 587                                 return generic_params != null;
 588                         }
 589                 }
 590
 591                 public override MethodInfo GetGenericMethodDefinition ()
 592                 {
 593                         if (!IsGenericMethodDefinition)
 594                                 throw new InvalidOperationException ();
 595
 596                         return this;
 597                 }
 598
 599                 public override Type[] GetGenericArguments ()
 600                 {
 601                         if (generic_params == null)
 602                                 return null;
 603
 604                         Type[] result = new Type [generic_params.Length];
 605                         for (int i = 0; i < generic_params.Length; i++)
 606                                 result [i] = generic_params [i];
 607
 608                         return result;
 609                 }
 610
 611                 public GenericTypeParameterBuilder[] DefineGenericParameters (params string[] names)
 612                 {
 613                         if (names == null)
 614                                 throw new ArgumentNullException ("names");
 615                         if (names.Length == 0)
 616                                 throw new ArgumentException ("names");
 617
 618                         generic_params = new GenericTypeParameterBuilder [names.Length];
 619                         for (int i = 0; i < names.Length; i++) {
 620                                 string item = names [i];
 621                                 if (item == null)
 622                                         throw new ArgumentNullException ("names");
 623                                 generic_params [i] = new GenericTypeParameterBuilder (type, this, item, i);
 624                         }
 625
 626                         return generic_params;
 627                 }
 628
 629                 public void SetReturnType (Type returnType)
 630                 {
 631                         rtype = returnType;
 632                 }
 633
 634                 public void SetParameters (params Type[] parameterTypes)
 635                 {
 636                         if (parameterTypes != null) {
 637                                 for (int i = 0; i < parameterTypes.Length; ++i)
 638                                         if (parameterTypes [i] == null)
 639                                                 throw new ArgumentException ("Elements of the parameterTypes array cannot be null", "parameterTypes");
 640
 641                                 this.parameters = new Type [parameterTypes.Length];
 642                                 System.Array.Copy (parameterTypes, this.parameters, parameterTypes.Length);
 643                         }
 644                 }
 645
 646                 public void SetSignature (Type returnType, Type[] returnTypeRequiredCustomModifiers, Type[] returnTypeOptionalCustomModifiers, Type[] parameterTypes, Type[][] parameterTypeRequiredCustomModifiers, Type[][] parameterTypeOptionalCustomModifiers)
 647                 {
 648                         SetReturnType (returnType);
 649                         SetParameters (parameterTypes);
 650                         this.returnModReq = returnTypeRequiredCustomModifiers;
 651                         this.returnModOpt = returnTypeOptionalCustomModifiers;
 652                         this.paramModReq = parameterTypeRequiredCustomModifiers;
 653                         this.paramModOpt = parameterTypeOptionalCustomModifiers;
 654                 }
 655
 656                 public override Module Module {
 657                         get {
 658                                 return GetModule ();
 659                         }
 660                 }
 661
 662                 void _MethodBuilder.GetIDsOfNames([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 663                 {
 664                         throw new NotImplementedException ();
 665                 }
 666
 667                 void _MethodBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 668                 {
 669                         throw new NotImplementedException ();
 670                 }
 671
 672                 void _MethodBuilder.GetTypeInfoCount (out uint pcTInfo)
 673                 {
 674                         throw new NotImplementedException ();
 675                 }
 676
 677                 void _MethodBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 678                 {
 679                         throw new NotImplementedException ();
 680                 }
 681
 682                 public override ParameterInfo ReturnParameter {
 683                         get { return base.ReturnParameter; }
 684                 }
 685         }
 686 }
 687 #endif