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

   1
   2 //
   3 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24
  25 //
  26 // System.Reflection.Emit/CustomAttributeBuilder.cs
  27 //
  28 // Author:
  29 //   Paolo Molaro (lupus@ximian.com)
  30 //
  31 // (C) 2001 Ximian, Inc.  http://www.ximian.com
  32 //
  33
  34 #if !FULL_AOT_RUNTIME
  35 using System;
  36 using System.Reflection;
  37 using System.Reflection.Emit;
  38 using System.Runtime.CompilerServices;
  39 using System.Runtime.InteropServices;
  40
  41 namespace System.Reflection.Emit {
  42         [ComVisible (true)]
  43         [ComDefaultInterface (typeof (_CustomAttributeBuilder))]
  44         [ClassInterface (ClassInterfaceType.None)]
  45         [StructLayout (LayoutKind.Sequential)]
  46         public class CustomAttributeBuilder : _CustomAttributeBuilder {
  47                 ConstructorInfo ctor;
  48                 byte[] data;
  49
  50                 internal ConstructorInfo Ctor {
  51                         get {return ctor;}
  52                 }
  53
  54                 internal byte[] Data {
  55                         get {return data;}
  56                 }
  57
  58                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  59                 static extern byte[] GetBlob(Assembly asmb, ConstructorInfo con, object[] constructorArgs, PropertyInfo[] namedProperties, object[] propertyValues, FieldInfo[] namedFields, object[] fieldValues);
  60
  61                 internal CustomAttributeBuilder( ConstructorInfo con, byte[] cdata) {
  62                         ctor = con;
  63                         data = (byte[])cdata.Clone ();
  64                         /* should we check that the user supplied data is correct? */
  65                 }
  66
  67                 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs)
  68                 {
  69                         Initialize (con, constructorArgs, new PropertyInfo [0], new object [0],
  70                                         new FieldInfo [0], new object [0]);
  71                 }
  72                 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
  73                                 FieldInfo[] namedFields, object[] fieldValues)
  74                 {
  75                         Initialize (con, constructorArgs, new PropertyInfo [0], new object [0],
  76                                         namedFields, fieldValues);
  77                 }
  78                 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
  79                                 PropertyInfo[] namedProperties, object[] propertyValues)
  80                 {
  81                         Initialize (con, constructorArgs, namedProperties, propertyValues, new FieldInfo [0],
  82                                         new object [0]);
  83                 }
  84                 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
  85                                 PropertyInfo[] namedProperties, object[] propertyValues,
  86                                 FieldInfo[] namedFields, object[] fieldValues)
  87                 {
  88                         Initialize (con, constructorArgs, namedProperties, propertyValues, namedFields, fieldValues);
  89                 }
  90
  91                 private bool IsValidType (Type t)
  92                 {
  93                         /* FIXME: Add more checks */
  94                         if (t.IsArray && t.GetArrayRank () > 1)
  95                                 return false;
  96                         if (t is TypeBuilder && t.IsEnum) {
  97                                 // Check that the enum is properly constructed, the unmanaged code
  98                                 // depends on this
  99                                 Enum.GetUnderlyingType (t);
 100                         }
 101                         if (t.IsClass && !(t.IsArray || t == typeof (object) || t == typeof (Type) || t == typeof (string) || t.Assembly.GetName ().Name == "mscorlib"))
 102                                 return false;
 103                         if (t.IsValueType && !(t.IsPrimitive || t.IsEnum || ((t.Assembly is AssemblyBuilder) && t.Assembly.GetName ().Name == "mscorlib")))
 104                                 return false;
 105                         return true;
 106                 }
 107
 108                 private bool IsValidParam (object o, Type paramType)
 109                 {
 110                         Type t = o.GetType ();
 111                         if (!IsValidType (t))
 112                                 return false;
 113                         if (paramType == typeof (object)) {
 114                                 if (t.IsArray && t.GetArrayRank () == 1)
 115                                         return IsValidType (t.GetElementType ());
 116                                 if (!t.IsPrimitive && !typeof (Type).IsAssignableFrom (t) && t != typeof (string) && !t.IsEnum)
 117                                         return false;
 118                         }
 119                         return true;
 120                 }
 121
 122                 static bool IsValidValue (Type type, object value) {
 123                         if (type.IsValueType && value == null)
 124                                 return false;
 125                         if (type.IsArray && type.GetElementType ().IsValueType) {
 126                                 foreach (var v in (Array)value) {
 127                                         if (v == null)
 128                                                 return false;
 129                                 }
 130                         }
 131                         return true;
 132                 }
 133
 134                 private void Initialize (ConstructorInfo con, object [] constructorArgs,
 135                                 PropertyInfo [] namedProperties, object [] propertyValues,
 136                                 FieldInfo [] namedFields, object [] fieldValues)
 137                 {
 138                         ctor = con;
 139                         if (con == null)
 140                                 throw new ArgumentNullException ("con");
 141                         if (constructorArgs == null)
 142                                 throw new ArgumentNullException ("constructorArgs");
 143                         if (namedProperties == null)
 144                                 throw new ArgumentNullException ("namedProperties");
 145                         if (propertyValues == null)
 146                                 throw new ArgumentNullException ("propertyValues");
 147                         if (namedFields == null)
 148                                 throw new ArgumentNullException ("namedFields");
 149                         if (fieldValues == null)
 150                                 throw new ArgumentNullException ("fieldValues");
 151                         if (con.GetParametersCount () != constructorArgs.Length)
 152                                 throw new ArgumentException ("Parameter count does not match " +
 153                                                 "passed in argument value count.");
 154                         if (namedProperties.Length != propertyValues.Length)
 155                                 throw new ArgumentException ("Array lengths must be the same.",
 156                                                 "namedProperties, propertyValues");
 157                         if (namedFields.Length != fieldValues.Length)
 158                                 throw new ArgumentException ("Array lengths must be the same.",
 159                                                 "namedFields, fieldValues");
 160                         if ((con.Attributes & MethodAttributes.Static) == MethodAttributes.Static ||
 161                                         (con.Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private)
 162                                 throw new ArgumentException ("Cannot have private or static constructor.");
 163
 164                         Type atype = ctor.DeclaringType;
 165                         int i;
 166                         i = 0;
 167                         foreach (FieldInfo fi in namedFields) {
 168                                 Type t = fi.DeclaringType;
 169                                 if ((atype != t) && (!t.IsSubclassOf (atype)) && (!atype.IsSubclassOf (t)))
 170                                         throw new ArgumentException ("Field '" + fi.Name + "' does not belong to the same class as the constructor");
 171                                 if (!IsValidType (fi.FieldType))
 172                                         throw new ArgumentException ("Field '" + fi.Name + "' does not have a valid type.");
 173                                 if (!IsValidValue (fi.FieldType, fieldValues [i]))
 174                                         throw new ArgumentException ("Field " + fi.Name + " is not a valid value.");
 175                                 // FIXME: Check enums and TypeBuilders as well
 176                                 if (fieldValues [i] != null)
 177                                         // IsEnum does not seem to work on TypeBuilders
 178                                         if (!(fi.FieldType is TypeBuilder) && !fi.FieldType.IsEnum && !fi.FieldType.IsInstanceOfType (fieldValues [i])) {
 179                                                 //
 180                                                 // mcs allways uses object[] for array types and
 181                                                 // MS.NET allows this
 182                                                 //
 183                                                 if (!fi.FieldType.IsArray)
 184                                                         throw new ArgumentException ("Value of field '" + fi.Name + "' does not match field type: " + fi.FieldType);
 185                                                 }
 186                                 i ++;
 187                         }
 188
 189                         i = 0;
 190                         foreach (PropertyInfo pi in namedProperties) {
 191                                 if (!pi.CanWrite)
 192                                         throw new ArgumentException ("Property '" + pi.Name + "' does not have a setter.");
 193                                 Type t = pi.DeclaringType;
 194                                 if ((atype != t) && (!t.IsSubclassOf (atype)) && (!atype.IsSubclassOf (t)))
 195                                         throw new ArgumentException ("Property '" + pi.Name + "' does not belong to the same class as the constructor");
 196                                 if (!IsValidType (pi.PropertyType))
 197                                         throw new ArgumentException ("Property '" + pi.Name + "' does not have a valid type.");
 198                                 if (!IsValidValue (pi.PropertyType, propertyValues [i]))
 199                                         throw new ArgumentException ("Property " + pi.Name + " is not a valid value.");
 200                                 if (propertyValues [i] != null) {
 201                                         if (!(pi.PropertyType is TypeBuilder) && !pi.PropertyType.IsEnum && !pi.PropertyType.IsInstanceOfType (propertyValues [i]))
 202                                                 if (!pi.PropertyType.IsArray)
 203                                                         throw new ArgumentException ("Value of property '" + pi.Name + "' does not match property type: " + pi.PropertyType + " -> " + propertyValues [i]);
 204                                 }
 205                                 i ++;
 206                         }
 207
 208                         i = 0;
 209                         foreach (ParameterInfo pi in GetParameters (con)) {
 210                                 if (pi != null) {
 211                                         Type paramType = pi.ParameterType;
 212                                         if (!IsValidType (paramType))
 213                                                 throw new ArgumentException ("Parameter " + i + " does not have a valid type.");
 214                                         if (!IsValidValue (paramType, constructorArgs [i]))
 215                                                 throw new ArgumentException ("Parameter " + i + " is not a valid value.");
 216
 217                                         if (constructorArgs [i] != null) {
 218                                                 if (!(paramType is TypeBuilder) && !paramType.IsEnum && !paramType.IsInstanceOfType (constructorArgs [i]))
 219                                                         if (!paramType.IsArray)
 220                                                                 throw new ArgumentException ("Value of argument " + i + " does not match parameter type: " + paramType + " -> " + constructorArgs [i]);
 221                                                 if (!IsValidParam (constructorArgs [i], paramType))
 222                                                         throw new ArgumentException ("Cannot emit a CustomAttribute with argument of type " + constructorArgs [i].GetType () + ".");
 223                                         }
 224                                 }
 225                                 i ++;
 226                         }
 227
 228                         data = GetBlob (atype.Assembly, con, constructorArgs, namedProperties, propertyValues, namedFields, fieldValues);
 229                 }
 230
 231                 /* helper methods */
 232                 internal static int decode_len (byte[] data, int pos, out int rpos) {
 233                         int len = 0;
 234                         if ((data [pos] & 0x80) == 0) {
 235                                 len = (int)(data [pos++] & 0x7f);
 236                         } else if ((data [pos] & 0x40) == 0) {
 237                                 len = ((data [pos] & 0x3f) << 8) + data [pos + 1];
 238                                 pos += 2;
 239                         } else {
 240                                 len = ((data [pos] & 0x1f) << 24) + (data [pos + 1] << 16) + (data [pos + 2] << 8) + data [pos + 3];
 241                                 pos += 4;
 242                         }
 243                         rpos = pos;
 244                         return len;
 245                 }
 246
 247                 internal static string string_from_bytes (byte[] data, int pos, int len)
 248                 {
 249                         return System.Text.Encoding.UTF8.GetString(data, pos, len);
 250                 }
 251
 252                 internal string string_arg ()
 253                 {
 254                         int pos = 2;
 255                         int len = decode_len (data, pos, out pos);
 256                         return string_from_bytes (data, pos, len);
 257                 }
 258
 259                 internal static UnmanagedMarshal get_umarshal (CustomAttributeBuilder customBuilder, bool is_field) {
 260                         byte[] data = customBuilder.Data;
 261                         UnmanagedType subtype = (UnmanagedType)0x50; /* NATIVE_MAX */
 262                         int sizeConst = -1;
 263                         int sizeParamIndex = -1;
 264                         bool hasSize = false;
 265                         int value;
 266                         int utype; /* the (stupid) ctor takes a short or an enum ... */
 267                         string marshalTypeName = null;
 268                         Type marshalTypeRef = null;
 269                         string marshalCookie = String.Empty;
 270                         utype = (int)data [2];
 271                         utype |= ((int)data [3]) << 8;
 272
 273                         string first_type_name = GetParameters (customBuilder.Ctor) [0].ParameterType.FullName;
 274                         int pos = 6;
 275                         if (first_type_name == "System.Int16")
 276                                 pos = 4;
 277                         int nnamed = (int)data [pos++];
 278                         nnamed |= ((int)data [pos++]) << 8;
 279
 280                         for (int i = 0; i < nnamed; ++i) {
 281                                 int paramType; // What is this ?
 282
 283                                 /* Skip field/property signature */
 284                                 pos ++;
 285                                 /* Read type */
 286                                 paramType = ((int)data [pos++]);
 287                                 if (paramType == 0x55) {
 288                                         /* enums, the value is preceeded by the type */
 289                                         int len2 = decode_len (data, pos, out pos);
 290                                         string_from_bytes (data, pos, len2);
 291                                         pos += len2;
 292                                 }
 293                                 int len = decode_len (data, pos, out pos);
 294                                 string named_name = string_from_bytes (data, pos, len);
 295                                 pos += len;
 296
 297                                 switch (named_name) {
 298                                 case "ArraySubType":
 299                                         value = (int)data [pos++];
 300                                         value |= ((int)data [pos++]) << 8;
 301                                         value |= ((int)data [pos++]) << 16;
 302                                         value |= ((int)data [pos++]) << 24;
 303                                         subtype = (UnmanagedType)value;
 304                                         break;
 305                                 case "SizeConst":
 306                                         value = (int)data [pos++];
 307                                         value |= ((int)data [pos++]) << 8;
 308                                         value |= ((int)data [pos++]) << 16;
 309                                         value |= ((int)data [pos++]) << 24;
 310                                         sizeConst = value;
 311                                         hasSize = true;
 312                                         break;
 313                                 case "SafeArraySubType":
 314                                         value = (int)data[pos++];
 315                                         value |= ((int)data[pos++]) << 8;
 316                                         value |= ((int)data[pos++]) << 16;
 317                                         value |= ((int)data[pos++]) << 24;
 318                                         subtype = (UnmanagedType)value;
 319                                         break;
 320                                 case "IidParameterIndex":
 321                                         pos += 4;
 322                                         break;
 323                                 case "SafeArrayUserDefinedSubType":
 324                                         len = decode_len (data, pos, out pos);
 325                                         string_from_bytes (data, pos, len);
 326                                         pos += len;
 327                                         break;
 328                                 case "SizeParamIndex":
 329                                         value = (int)data [pos++];
 330                                         value |= ((int)data [pos++]) << 8;
 331                                         sizeParamIndex = value;
 332                                         hasSize = true;
 333                                         break;
 334                                 case "MarshalType":
 335                                         len = decode_len (data, pos, out pos);
 336                                         marshalTypeName = string_from_bytes (data, pos, len);
 337                                         pos += len;
 338                                         break;
 339                                 case "MarshalTypeRef":
 340                                         len = decode_len (data, pos, out pos);
 341                                         marshalTypeName = string_from_bytes (data, pos, len);
 342                                         marshalTypeRef = Type.GetType (marshalTypeName);
 343                                         pos += len;
 344                                         break;
 345                                 case "MarshalCookie":
 346                                         len = decode_len (data, pos, out pos);
 347                                         marshalCookie = string_from_bytes (data, pos, len);
 348                                         pos += len;
 349                                         break;
 350                                 default:
 351                                         throw new Exception ("Unknown MarshalAsAttribute field: " + named_name);
 352                                 }
 353                         }
 354
 355                         switch ((UnmanagedType)utype) {
 356                         case UnmanagedType.LPArray:
 357                                 if (hasSize)
 358                                         return UnmanagedMarshal.DefineLPArrayInternal (subtype, sizeConst, sizeParamIndex);
 359                                 else
 360                                         return UnmanagedMarshal.DefineLPArray (subtype);
 361 #if FEATURE_COMINTEROP
 362                         case UnmanagedType.SafeArray:
 363                                 return UnmanagedMarshal.DefineSafeArray (subtype);
 364 #endif
 365                         case UnmanagedType.ByValArray:
 366                                 if (!is_field)
 367                                         throw new ArgumentException ("Specified unmanaged type is only valid on fields");
 368
 369                                 return UnmanagedMarshal.DefineByValArray (sizeConst);
 370                         case UnmanagedType.ByValTStr:
 371                                 return UnmanagedMarshal.DefineByValTStr (sizeConst);
 372 #if FEATURE_COMINTEROP
 373                         case UnmanagedType.CustomMarshaler:
 374                                 return UnmanagedMarshal.DefineCustom (marshalTypeRef, marshalCookie, marshalTypeName, Guid.Empty);
 375 #endif
 376                         default:
 377                                 return UnmanagedMarshal.DefineUnmanagedMarshal ((UnmanagedType)utype);
 378                         }
 379                 }
 380
 381                 static Type elementTypeToType (int elementType) {
 382                         /* Partition II, section 23.1.16 */
 383                         switch (elementType) {
 384                         case 0x02:
 385                                 return typeof (bool);
 386                         case 0x03:
 387                                 return typeof (char);
 388                         case 0x04:
 389                                 return typeof (sbyte);
 390                         case 0x05:
 391                                 return typeof (byte);
 392                         case 0x06:
 393                                 return typeof (short);
 394                         case 0x07:
 395                                 return typeof (ushort);
 396                         case 0x08:
 397                                 return typeof (int);
 398                         case 0x09:
 399                                 return typeof (uint);
 400                         case 0x0a:
 401                                 return typeof (long);
 402                         case 0x0b:
 403                                 return typeof (ulong);
 404                         case 0x0c:
 405                                 return typeof (float);
 406                         case 0x0d:
 407                                 return typeof (double);
 408                         case 0x0e:
 409                                 return typeof (string);
 410                         default:
 411                                 throw new Exception ("Unknown element type '" + elementType + "'");
 412                         }
 413                 }
 414
 415                 static object decode_cattr_value (Type t, byte[] data, int pos, out int rpos) {
 416                         switch (Type.GetTypeCode (t)) {
 417                         case TypeCode.String:
 418                                 if (data [pos] == 0xff) {
 419                                         rpos = pos + 1;
 420                                         return null;
 421                                 }
 422                                 int len = decode_len (data, pos, out pos);
 423                                 rpos = pos + len;
 424                                 return string_from_bytes (data, pos, len);
 425                         case TypeCode.Int32:
 426                                 rpos = pos + 4;
 427                                 return data [pos] + (data [pos + 1] << 8) + (data [pos + 2] << 16) + (data [pos + 3] << 24);
 428                         case TypeCode.Boolean:
 429                                 rpos = pos + 1;
 430                                 return (data [pos] == 0) ? false : true;
 431                         case TypeCode.Object:
 432                                 int subtype = data [pos];
 433                                 pos += 1;
 434
 435                                 if (subtype >= 0x02 && subtype <= 0x0e)
 436                                         return decode_cattr_value (elementTypeToType (subtype), data, pos, out rpos);
 437                                 else
 438                                         throw new Exception ("Subtype '" + subtype + "' of type object not yet handled in decode_cattr_value");
 439                         default:
 440                                 throw new Exception ("FIXME: Type " + t + " not yet handled in decode_cattr_value.");
 441                         }
 442                 }
 443
 444                 internal struct CustomAttributeInfo {
 445                         public ConstructorInfo ctor;
 446                         public object[] ctorArgs;
 447                         public string[] namedParamNames;
 448                         public object[] namedParamValues;
 449                 }
 450
 451                 internal static CustomAttributeInfo decode_cattr (CustomAttributeBuilder customBuilder) {
 452                         byte[] data = customBuilder.Data;
 453                         ConstructorInfo ctor = customBuilder.Ctor;
 454                         int pos = 0;
 455
 456                         CustomAttributeInfo info = new CustomAttributeInfo ();
 457
 458                         // Prolog
 459                         if (data.Length < 2)
 460                                 throw new Exception ("Custom attr length is only '" + data.Length + "'");
 461                         if ((data [0] != 0x1) || (data [1] != 0x00))
 462                                 throw new Exception ("Prolog invalid");
 463                         pos = 2;
 464
 465                         ParameterInfo [] pi = GetParameters (ctor);
 466                         info.ctor = ctor;
 467                         info.ctorArgs = new object [pi.Length];
 468                         for (int i = 0; i < pi.Length; ++i)
 469                                 info.ctorArgs [i] = decode_cattr_value (pi [i].ParameterType, data, pos, out pos);
 470
 471                         int num_named = data [pos] + (data [pos + 1] * 256);
 472                         pos += 2;
 473
 474                         info.namedParamNames = new string [num_named];
 475                         info.namedParamValues = new object [num_named];
 476                         for (int i = 0; i < num_named; ++i) {
 477                                 int named_type = data [pos++];
 478                                 int data_type = data [pos++];
 479                                 string enum_type_name = null;
 480
 481                                 if (data_type == 0x55) {
 482                                         int len2 = decode_len (data, pos, out pos);
 483                                         enum_type_name = string_from_bytes (data, pos, len2);
 484                                         pos += len2;
 485                                 }
 486
 487                                 int len = decode_len (data, pos, out pos);
 488                                 string name = string_from_bytes (data, pos, len);
 489                                 info.namedParamNames [i] = name;
 490                                 pos += len;
 491
 492                                 if (named_type == 0x53) {
 493                                         /* Field */
 494                                         FieldInfo fi = ctor.DeclaringType.GetField (name, BindingFlags.Public|BindingFlags.NonPublic|BindingFlags.Instance);
 495                                         if (fi == null)
 496                                                 throw new Exception ("Custom attribute type '" + ctor.DeclaringType + "' doesn't contain a field named '" + name + "'");
 497
 498                                         object val = decode_cattr_value (fi.FieldType, data, pos, out pos);
 499                                         if (enum_type_name != null) {
 500                                                 Type enumType = Type.GetType (enum_type_name);
 501                                                 val = Enum.ToObject (enumType, val);
 502                                         }
 503
 504                                         info.namedParamValues [i] = val;
 505                                 }
 506                                 else
 507                                         // FIXME:
 508                                         throw new Exception ("Unknown named type: " + named_type);
 509                         }
 510
 511                         return info;
 512                 }
 513
 514                 void _CustomAttributeBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 515                 {
 516                         throw new NotImplementedException ();
 517                 }
 518
 519                 void _CustomAttributeBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 520                 {
 521                         throw new NotImplementedException ();
 522                 }
 523
 524                 void _CustomAttributeBuilder.GetTypeInfoCount (out uint pcTInfo)
 525                 {
 526                         throw new NotImplementedException ();
 527                 }
 528
 529                 void _CustomAttributeBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 530                 {
 531                         throw new NotImplementedException ();
 532                 }
 533
 534                 static ParameterInfo [] GetParameters (ConstructorInfo ctor)
 535                 {
 536                         ConstructorBuilder cb = ctor as ConstructorBuilder;
 537                         if (cb != null)
 538                                 return cb.GetParametersInternal ();
 539
 540                         return ctor.GetParametersInternal ();
 541                 }
 542         }
 543 }
 544 #endif