mcs/mcs/enum.cs

   1 //
   2 // enum.cs: Enum handling.
   3 //
   4 // Author: Miguel de Icaza (miguel@gnu.org)
   5 //         Ravi Pratap     (ravi@ximian.com)
   6 //
   7 // Licensed under the terms of the GNU GPL
   8 //
   9 // (C) 2001 Ximian, Inc (http://www.ximian.com)
  10 //
  11
  12 using System;
  13 using System.Collections;
  14 using System.Reflection;
  15 using System.Reflection.Emit;
  16 using System.Globalization;
  17
  18 namespace Mono.CSharp {
  19
  20         class EnumMember: MemberCore {
  21                 static string[] attribute_targets = new string [] { "field" };
  22
  23                 Enum parent_enum;
  24                 public FieldBuilder builder;
  25                 internal readonly Expression Type;
  26
  27                 public EnumMember (Enum parent_enum, Expression expr, string name,
  28                                    Location loc, Attributes attrs):
  29                         base (null, new MemberName (name), attrs, loc)
  30                 {
  31                         this.parent_enum = parent_enum;
  32                         this.ModFlags = parent_enum.ModFlags;
  33                         this.Type = expr;
  34                 }
  35
  36                 public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
  37                 {
  38                         if (a.Type == TypeManager.marshal_as_attr_type) {
  39                                 UnmanagedMarshal marshal = a.GetMarshal (this);
  40                                 if (marshal != null) {
  41                                         builder.SetMarshal (marshal);
  42                                 }
  43                                 return;
  44                         }
  45
  46                         if (a.Type.IsSubclassOf (TypeManager.security_attr_type)) {
  47                                 a.Error_InvalidSecurityParent ();
  48                                 return;
  49                         }
  50
  51                         builder.SetCustomAttribute (cb);
  52                 }
  53
  54                 public override AttributeTargets AttributeTargets {
  55                         get {
  56                                 return AttributeTargets.Field;
  57                         }
  58                 }
  59
  60                 public void DefineMember (TypeBuilder tb)
  61                 {
  62                         FieldAttributes attr = FieldAttributes.Public | FieldAttributes.Static
  63                                 | FieldAttributes.Literal;
  64
  65                         builder = tb.DefineField (Name, tb, attr);
  66                 }
  67
  68                 public override bool Define ()
  69                 {
  70                         throw new NotImplementedException ();
  71                 }
  72
  73                 public void Emit (EmitContext ec)
  74                 {
  75                         if (OptAttributes != null)
  76                                 OptAttributes.Emit (ec, this);
  77
  78                         Emit ();
  79                 }
  80
  81                 public override string GetSignatureForError()
  82                 {
  83                         return String.Concat (parent_enum.GetSignatureForError (), '.', base.GetSignatureForError ());
  84                 }
  85
  86                 public override string[] ValidAttributeTargets {
  87                         get {
  88                                 return attribute_targets;
  89                         }
  90                 }
  91
  92                 protected override bool VerifyClsCompliance(DeclSpace ds)
  93                 {
  94                         // Because parent is TypeContainer and we have only DeclSpace parent.
  95                         // Parameter replacing is required
  96                         return base.VerifyClsCompliance (parent_enum);
  97                 }
  98
  99                 // There is no base type
 100                 protected override void VerifyObsoleteAttribute()
 101                 {
 102                 }
 103
 104                 public override string DocCommentHeader {
 105                         get { return "F:"; }
 106                 }
 107         }
 108
 109         /// <summary>
 110         ///   Enumeration container
 111         /// </summary>
 112         public class Enum : DeclSpace {
 113                 public ArrayList ordered_enums;
 114
 115                 public Expression BaseType;
 116
 117                 public Type UnderlyingType;
 118
 119                 Hashtable member_to_location;
 120
 121                 //
 122                 // This is for members that have been defined
 123                 //
 124                 Hashtable member_to_value;
 125
 126                 //
 127                 // This is used to mark members we're currently defining
 128                 //
 129                 Hashtable in_transit;
 130
 131                 ArrayList field_builders;
 132
 133                 public const int AllowedModifiers =
 134                         Modifiers.NEW |
 135                         Modifiers.PUBLIC |
 136                         Modifiers.PROTECTED |
 137                         Modifiers.INTERNAL |
 138                         Modifiers.PRIVATE;
 139
 140                 public Enum (NamespaceEntry ns, TypeContainer parent, Expression type,
 141                              int mod_flags, MemberName name, Attributes attrs, Location l)
 142                         : base (ns, parent, name, attrs, l)
 143                 {
 144                         this.BaseType = type;
 145                         ModFlags = Modifiers.Check (AllowedModifiers, mod_flags,
 146                                                     IsTopLevel ? Modifiers.INTERNAL : Modifiers.PRIVATE, l);
 147
 148                         ordered_enums = new ArrayList ();
 149                         member_to_location = new Hashtable ();
 150                         member_to_value = new Hashtable ();
 151                         in_transit = new Hashtable ();
 152                         field_builders = new ArrayList ();
 153                 }
 154
 155                 /// <summary>
 156                 ///   Adds @name to the enumeration space, with @expr
 157                 ///   being its definition.
 158                 /// </summary>
 159                 public void AddEnumMember (string name, Expression expr, Location loc, Attributes opt_attrs, string documentation)
 160                 {
 161                         if (name == "value__") {
 162                                 Report.Error (76, loc, "An item in an enumeration cannot have an identifier `value__'");
 163                                 return;
 164                         }
 165
 166                         EnumMember em = new EnumMember (this, expr, name, loc, opt_attrs);
 167                         em.DocComment = documentation;
 168                         if (!AddToContainer (em, name))
 169                                 return;
 170
 171
 172                         // TODO: can be almost deleted
 173                         ordered_enums.Add (name);
 174                         member_to_location.Add (name, loc);
 175                 }
 176
 177                 public override TypeBuilder DefineType ()
 178                 {
 179                         if (TypeBuilder != null)
 180                                 return TypeBuilder;
 181
 182                         ec = new EmitContext (this, this, Location, null, null, ModFlags, false);
 183                         ec.InEnumContext = true;
 184
 185                         if (!(BaseType is TypeLookupExpression)) {
 186                                 Report.Error (1008, Location,
 187                                         "Type byte, sbyte, short, ushort, int, uint, long or ulong expected");
 188                                 return null;
 189                         }
 190
 191                         TypeExpr ute = ResolveBaseTypeExpr (BaseType, false, Location);
 192                         UnderlyingType = ute.Type;
 193
 194                         if (UnderlyingType != TypeManager.int32_type &&
 195                             UnderlyingType != TypeManager.uint32_type &&
 196                             UnderlyingType != TypeManager.int64_type &&
 197                             UnderlyingType != TypeManager.uint64_type &&
 198                             UnderlyingType != TypeManager.short_type &&
 199                             UnderlyingType != TypeManager.ushort_type &&
 200                             UnderlyingType != TypeManager.byte_type  &&
 201                             UnderlyingType != TypeManager.sbyte_type) {
 202                                 Report.Error (1008, Location,
 203                                         "Type byte, sbyte, short, ushort, int, uint, long or ulong expected");
 204                                 return null;
 205                         }
 206
 207                         if (IsTopLevel) {
 208                                 if (TypeManager.NamespaceClash (Name, Location))
 209                                         return null;
 210
 211                                 ModuleBuilder builder = CodeGen.Module.Builder;
 212
 213                                 TypeBuilder = builder.DefineType (Name, TypeAttr, TypeManager.enum_type);
 214                         } else {
 215                                 TypeBuilder builder = Parent.TypeBuilder;
 216
 217                                 TypeBuilder = builder.DefineNestedType (
 218                                         Basename, TypeAttr, TypeManager.enum_type);
 219                         }
 220
 221                         ec.ContainerType = TypeBuilder;
 222
 223                         //
 224                         // Call MapToInternalType for corlib
 225                         //
 226                         TypeBuilder.DefineField ("value__", UnderlyingType,
 227                                                  FieldAttributes.Public | FieldAttributes.SpecialName
 228                                                  | FieldAttributes.RTSpecialName);
 229
 230                         TypeManager.AddEnumType (Name, TypeBuilder, this);
 231
 232                         return TypeBuilder;
 233                 }
 234
 235                 bool IsValidEnumConstant (Expression e)
 236                 {
 237                         if (!(e is Constant))
 238                                 return false;
 239
 240                         if (e is IntConstant || e is UIntConstant || e is LongConstant ||
 241                             e is ByteConstant || e is SByteConstant || e is ShortConstant ||
 242                             e is UShortConstant || e is ULongConstant || e is EnumConstant ||
 243                             e is CharConstant)
 244                                 return true;
 245                         else
 246                                 return false;
 247                 }
 248
 249                 object GetNextDefaultValue (object default_value)
 250                 {
 251                         if (UnderlyingType == TypeManager.int32_type) {
 252                                 int i = (int) default_value;
 253
 254                                 if (i < System.Int32.MaxValue)
 255                                         return ++i;
 256                                 else
 257                                         return null;
 258                         } else if (UnderlyingType == TypeManager.uint32_type) {
 259                                 uint i = (uint) default_value;
 260
 261                                 if (i < System.UInt32.MaxValue)
 262                                         return ++i;
 263                                 else
 264                                         return null;
 265                         } else if (UnderlyingType == TypeManager.int64_type) {
 266                                 long i = (long) default_value;
 267
 268                                 if (i < System.Int64.MaxValue)
 269                                         return ++i;
 270                                 else
 271                                         return null;
 272                         } else if (UnderlyingType == TypeManager.uint64_type) {
 273                                 ulong i = (ulong) default_value;
 274
 275                                 if (i < System.UInt64.MaxValue)
 276                                         return ++i;
 277                                 else
 278                                         return null;
 279                         } else if (UnderlyingType == TypeManager.short_type) {
 280                                 short i = (short) default_value;
 281
 282                                 if (i < System.Int16.MaxValue)
 283                                         return ++i;
 284                                 else
 285                                         return null;
 286                         } else if (UnderlyingType == TypeManager.ushort_type) {
 287                                 ushort i = (ushort) default_value;
 288
 289                                 if (i < System.UInt16.MaxValue)
 290                                         return ++i;
 291                                 else
 292                                         return null;
 293                         } else if (UnderlyingType == TypeManager.byte_type) {
 294                                 byte i = (byte) default_value;
 295
 296                                 if (i < System.Byte.MaxValue)
 297                                         return ++i;
 298                                 else
 299                                         return null;
 300                         } else if (UnderlyingType == TypeManager.sbyte_type) {
 301                                 sbyte i = (sbyte) default_value;
 302
 303                                 if (i < System.SByte.MaxValue)
 304                                         return ++i;
 305                                 else
 306                                         return null;
 307                         }
 308
 309                         return null;
 310                 }
 311
 312                 void Error_ConstantValueCannotBeConverted (object val, Location loc)
 313                 {
 314                         Report.Error (31, loc, "Constant value `{0}' cannot be converted to a `{1}'",
 315                                 val is Constant ? ((Constant) val).AsString () : val,
 316                                 TypeManager.CSharpName (UnderlyingType));
 317                 }
 318
 319                 /// <summary>
 320                 ///  Determines if a standard implicit conversion exists from
 321                 ///  expr_type to target_type
 322                 /// </summary>
 323                 public static bool ImplicitConversionExists (Type expr_type, Type target_type)
 324                 {
 325                         expr_type = TypeManager.TypeToCoreType (expr_type);
 326
 327                         if (expr_type == TypeManager.void_type)
 328                                 return false;
 329
 330                         if (expr_type == target_type)
 331                                 return true;
 332
 333                         // First numeric conversions
 334
 335                         if (expr_type == TypeManager.sbyte_type){
 336                                 //
 337                                 // From sbyte to short, int, long, float, double.
 338                                 //
 339                                 if ((target_type == TypeManager.int32_type) ||
 340                                     (target_type == TypeManager.int64_type) ||
 341                                     (target_type == TypeManager.double_type) ||
 342                                     (target_type == TypeManager.float_type)  ||
 343                                     (target_type == TypeManager.short_type) ||
 344                                     (target_type == TypeManager.decimal_type))
 345                                         return true;
 346
 347                         } else if (expr_type == TypeManager.byte_type){
 348                                 //
 349                                 // From byte to short, ushort, int, uint, long, ulong, float, double
 350                                 //
 351                                 if ((target_type == TypeManager.short_type) ||
 352                                     (target_type == TypeManager.ushort_type) ||
 353                                     (target_type == TypeManager.int32_type) ||
 354                                     (target_type == TypeManager.uint32_type) ||
 355                                     (target_type == TypeManager.uint64_type) ||
 356                                     (target_type == TypeManager.int64_type) ||
 357                                     (target_type == TypeManager.float_type) ||
 358                                     (target_type == TypeManager.double_type) ||
 359                                     (target_type == TypeManager.decimal_type))
 360                                         return true;
 361
 362                         } else if (expr_type == TypeManager.short_type){
 363                                 //
 364                                 // From short to int, long, float, double
 365                                 //
 366                                 if ((target_type == TypeManager.int32_type) ||
 367                                     (target_type == TypeManager.int64_type) ||
 368                                     (target_type == TypeManager.double_type) ||
 369                                     (target_type == TypeManager.float_type) ||
 370                                     (target_type == TypeManager.decimal_type))
 371                                         return true;
 372
 373                         } else if (expr_type == TypeManager.ushort_type){
 374                                 //
 375                                 // From ushort to int, uint, long, ulong, float, double
 376                                 //
 377                                 if ((target_type == TypeManager.uint32_type) ||
 378                                     (target_type == TypeManager.uint64_type) ||
 379                                     (target_type == TypeManager.int32_type) ||
 380                                     (target_type == TypeManager.int64_type) ||
 381                                     (target_type == TypeManager.double_type) ||
 382                                     (target_type == TypeManager.float_type) ||
 383                                     (target_type == TypeManager.decimal_type))
 384                                         return true;
 385
 386                         } else if (expr_type == TypeManager.int32_type){
 387                                 //
 388                                 // From int to long, float, double
 389                                 //
 390                                 if ((target_type == TypeManager.int64_type) ||
 391                                     (target_type == TypeManager.double_type) ||
 392                                     (target_type == TypeManager.float_type) ||
 393                                     (target_type == TypeManager.decimal_type))
 394                                         return true;
 395
 396                         } else if (expr_type == TypeManager.uint32_type){
 397                                 //
 398                                 // From uint to long, ulong, float, double
 399                                 //
 400                                 if ((target_type == TypeManager.int64_type) ||
 401                                     (target_type == TypeManager.uint64_type) ||
 402                                     (target_type == TypeManager.double_type) ||
 403                                     (target_type == TypeManager.float_type) ||
 404                                     (target_type == TypeManager.decimal_type))
 405                                         return true;
 406
 407                         } else if ((expr_type == TypeManager.uint64_type) ||
 408                                    (expr_type == TypeManager.int64_type)) {
 409                                 //
 410                                 // From long/ulong to float, double
 411                                 //
 412                                 if ((target_type == TypeManager.double_type) ||
 413                                     (target_type == TypeManager.float_type) ||
 414                                     (target_type == TypeManager.decimal_type))
 415                                         return true;
 416
 417                         } else if (expr_type == TypeManager.char_type){
 418                                 //
 419                                 // From char to ushort, int, uint, long, ulong, float, double
 420                                 //
 421                                 if ((target_type == TypeManager.ushort_type) ||
 422                                     (target_type == TypeManager.int32_type) ||
 423                                     (target_type == TypeManager.uint32_type) ||
 424                                     (target_type == TypeManager.uint64_type) ||
 425                                     (target_type == TypeManager.int64_type) ||
 426                                     (target_type == TypeManager.float_type) ||
 427                                     (target_type == TypeManager.double_type) ||
 428                                     (target_type == TypeManager.decimal_type))
 429                                         return true;
 430
 431                         } else if (expr_type == TypeManager.float_type){
 432                                 //
 433                                 // float to double
 434                                 //
 435                                 if (target_type == TypeManager.double_type)
 436                                         return true;
 437                         }
 438
 439                         return false;
 440                 }
 441
 442                 /// <summary>
 443                 ///  This is used to lookup the value of an enum member. If the member is undefined,
 444                 ///  it attempts to define it and return its value
 445                 /// </summary>
 446                 public object LookupEnumValue (string name, Location loc)
 447                 {
 448                         if (ec == null)
 449                                 Report.Error (-1, loc, "Enum.LookupEnumValue () called too soon");
 450
 451                         object default_value = null;
 452                         Constant c = null;
 453
 454                         default_value = member_to_value [name];
 455
 456                         if (default_value != null)
 457                                 return default_value;
 458
 459                         //
 460                         // This may happen if we're calling a method in System.Enum, for instance
 461                         // Enum.IsDefined().
 462                         //
 463                         if (!defined_names.Contains (name))
 464                                 return null;
 465
 466                         if (in_transit.Contains (name)) {
 467                                 Report.Error (110, loc, "The evaluation of the constant value for `" +
 468                                               Name + "." + name + "' involves a circular definition.");
 469                                 return null;
 470                         }
 471
 472                         //
 473                         // So if the above doesn't happen, we have a member that is undefined
 474                         // We now proceed to define it
 475                         //
 476                         Expression val = this [name];
 477
 478                         if (val == null) {
 479
 480                                 int idx = ordered_enums.IndexOf (name);
 481
 482                                 if (idx == 0)
 483                                         default_value = 0;
 484                                 else {
 485                                         for (int i = 0; i < idx; ++i) {
 486                                                 string n = (string) ordered_enums [i];
 487                                                 Location m_loc = (Mono.CSharp.Location)
 488                                                         member_to_location [n];
 489                                                 in_transit.Add (name, true);
 490                                                 default_value = LookupEnumValue (n, m_loc);
 491                                                 in_transit.Remove (name);
 492                                                 if (default_value == null)
 493                                                         return null;
 494                                         }
 495
 496                                         default_value = GetNextDefaultValue (default_value);
 497                                 }
 498
 499                         } else {
 500                                 in_transit.Add (name, true);
 501                                 val = val.Resolve (EmitContext);
 502                                 in_transit.Remove (name);
 503
 504                                 if (val == null)
 505                                         return null;
 506
 507                                 if (!IsValidEnumConstant (val)) {
 508                                         Report.Error (1008, loc,
 509                                                 "Type byte, sbyte, short, ushort, int, uint, long or ulong expected");
 510                                         return null;
 511                                 }
 512
 513                                 c = (Constant) val;
 514                                 default_value = c.GetValue ();
 515
 516                                 if (default_value == null) {
 517                                         Error_ConstantValueCannotBeConverted (c, loc);
 518                                         return null;
 519                                 }
 520
 521                                 if (val is EnumConstant){
 522                                         Type etype = TypeManager.EnumToUnderlying (c.Type);
 523
 524                                         if (!ImplicitConversionExists (etype, UnderlyingType)){
 525                                                 Convert.Error_CannotImplicitConversion (
 526                                                         loc, c.Type, UnderlyingType);
 527                                                 return null;
 528                                         }
 529                                 }
 530                         }
 531
 532                         EnumMember em = (EnumMember) defined_names [name];
 533                         em.DefineMember (TypeBuilder);
 534
 535                         bool fail;
 536                         default_value = TypeManager.ChangeType (default_value, UnderlyingType, out fail);
 537                         if (fail){
 538                                 Error_ConstantValueCannotBeConverted (c, loc);
 539                                 return null;
 540                         }
 541
 542                         em.builder.SetConstant (default_value);
 543                         field_builders.Add (em.builder);
 544                         member_to_value [name] = default_value;
 545
 546                         if (!TypeManager.RegisterFieldValue (em.builder, default_value))
 547                                 return null;
 548
 549                         return default_value;
 550                 }
 551
 552                 public override bool Define ()
 553                 {
 554                         //
 555                         // If there was an error during DefineEnum, return
 556                         //
 557                         if (TypeBuilder == null)
 558                                 return false;
 559
 560                         if (ec == null)
 561                                 throw new InternalErrorException ("Enum.Define () called too soon");
 562
 563                         object default_value = 0;
 564
 565
 566                         foreach (string name in ordered_enums) {
 567                                 //
 568                                 // Have we already been defined, thanks to some cross-referencing ?
 569                                 //
 570                                 if (member_to_value.Contains (name))
 571                                         continue;
 572
 573                                 Location loc = (Mono.CSharp.Location) member_to_location [name];
 574
 575                                 if (this [name] != null) {
 576                                         default_value = LookupEnumValue (name, loc);
 577
 578                                         if (default_value == null)
 579                                                 return true;
 580                                 } else {
 581                                         EnumMember em = (EnumMember) defined_names [name];
 582
 583                                         em.DefineMember (TypeBuilder);
 584                                         FieldBuilder fb = em.builder;
 585
 586                                         if (default_value == null) {
 587                                            Report.Error (543, loc, "The enumerator value `{0}.{1}' is too large to fit in its type `{2}'",
 588                                                    GetSignatureForError (), name, TypeManager.CSharpName (this.UnderlyingType));
 589                                                 return false;
 590                                         }
 591
 592                                         bool fail;
 593                                         default_value = TypeManager.ChangeType (default_value, UnderlyingType, out fail);
 594                                         if (fail){
 595                                                 Error_ConstantValueCannotBeConverted (default_value, loc);
 596                                                 return false;
 597                                         }
 598
 599                                         fb.SetConstant (default_value);
 600                                         field_builders.Add (fb);
 601                                         member_to_value [name] = default_value;
 602
 603                                         if (!TypeManager.RegisterFieldValue (fb, default_value))
 604                                                 return false;
 605                                 }
 606
 607                                 default_value = GetNextDefaultValue (default_value);
 608                         }
 609
 610                         return true;
 611                 }
 612
 613                 public override void Emit ()
 614                 {
 615                         if (OptAttributes != null) {
 616                                 OptAttributes.Emit (ec, this);
 617                         }
 618
 619                         foreach (EnumMember em in defined_names.Values) {
 620                                 em.Emit (ec);
 621                         }
 622
 623                         base.Emit ();
 624                 }
 625
 626                 void VerifyClsName ()
 627                 {
 628                         Hashtable ht = new Hashtable ();
 629                         foreach (string name in ordered_enums) {
 630                                 string locase = name.ToLower (System.Globalization.CultureInfo.InvariantCulture);
 631                                 if (!ht.Contains (locase)) {
 632                                         ht.Add (locase, defined_names [name]);
 633                                         continue;
 634                                 }
 635
 636                                 MemberCore conflict = (MemberCore)ht [locase];
 637                                 Report.SymbolRelatedToPreviousError (conflict);
 638                                 conflict = GetDefinition (name);
 639                                 Report.Error (3005, conflict.Location, "Identifier `{0}' differing only in case is not CLS-compliant", conflict.GetSignatureForError ());
 640                         }
 641                 }
 642
 643                 protected override bool VerifyClsCompliance (DeclSpace ds)
 644                 {
 645                         if (!base.VerifyClsCompliance (ds))
 646                                 return false;
 647
 648                         VerifyClsName ();
 649
 650                         if (!AttributeTester.IsClsCompliant (UnderlyingType)) {
 651                                 Report.Error (3009, Location, "`{0}': base type `{1}' is not CLS-compliant", GetSignatureForError (), TypeManager.CSharpName (UnderlyingType));
 652                         }
 653
 654                         return true;
 655                 }
 656
 657                 //
 658                 // IMemberFinder
 659                 //
 660                 public override MemberList FindMembers (MemberTypes mt, BindingFlags bf,
 661                                                         MemberFilter filter, object criteria)
 662                 {
 663                         ArrayList members = new ArrayList ();
 664
 665                         if ((mt & MemberTypes.Field) != 0) {
 666                                 if (criteria is string && member_to_value [criteria] == null) {
 667                                         LookupEnumValue ((string) criteria, Location.Null);
 668                                 }
 669
 670                                 foreach (FieldBuilder fb in field_builders)
 671                                         if (filter (fb, criteria) == true)
 672                                                 members.Add (fb);
 673                         }
 674
 675                         return new MemberList (members);
 676                 }
 677
 678                 public override MemberCache MemberCache {
 679                         get {
 680                                 return null;
 681                         }
 682                 }
 683
 684                 public ArrayList ValueNames {
 685                         get {
 686                                 return ordered_enums;
 687                         }
 688                 }
 689
 690                 // indexer
 691                 public Expression this [string name] {
 692                         get {
 693                                 return ((EnumMember) defined_names [name]).Type;
 694                         }
 695                 }
 696
 697                 public override AttributeTargets AttributeTargets {
 698                         get {
 699                                 return AttributeTargets.Enum;
 700                         }
 701                 }
 702
 703                 protected override TypeAttributes TypeAttr {
 704                         get {
 705                                 return Modifiers.TypeAttr (ModFlags, IsTopLevel) |
 706                                 TypeAttributes.Class | TypeAttributes.Sealed |
 707                                 base.TypeAttr;
 708                         }
 709                 }
 710
 711
 712                 protected override void VerifyObsoleteAttribute()
 713                 {
 714                         // UnderlyingType is never obsolete
 715                 }
 716
 717                 //
 718                 // Generates xml doc comments (if any), and if required,
 719                 // handle warning report.
 720                 //
 721                 internal override void GenerateDocComment (DeclSpace ds)
 722                 {
 723                         DocUtil.GenerateEnumDocComment (this, ds);
 724                 }
 725
 726                 //
 727                 //   Represents header string for documentation comment.
 728                 //
 729                 public override string DocCommentHeader {
 730                         get { return "T:"; }
 731                 }
 732         }
 733 }