mcs/mcs/decl.cs

   1 //
   2 // decl.cs: Declaration base class for structs, classes, enums and interfaces.
   3 //
   4 // Author: Miguel de Icaza (miguel@gnu.org)
   5 //         Marek Safar (marek.safar@seznam.cz)
   6 //
   7 // Licensed under the terms of the GNU GPL
   8 //
   9 // (C) 2001 Ximian, Inc (http://www.ximian.com)
  10 // (C) 2004 Novell, Inc
  11 //
  12 // TODO: Move the method verification stuff from the class.cs and interface.cs here
  13 //
  14
  15 using System;
  16 using System.Collections;
  17 using System.Globalization;
  18 using System.Reflection.Emit;
  19 using System.Reflection;
  20
  21 #if BOOTSTRAP_WITH_OLDLIB
  22 using XmlElement = System.Object;
  23 #else
  24 using System.Xml;
  25 #endif
  26
  27 namespace Mono.CSharp {
  28
  29         public class MemberName {
  30                 public string Name;
  31                 public readonly MemberName Left;
  32
  33                 public static readonly MemberName Null = new MemberName ("");
  34
  35                 public MemberName (string name)
  36                 {
  37                         this.Name = name;
  38                 }
  39
  40                 public MemberName (MemberName left, string name)
  41                         : this (name)
  42                 {
  43                         this.Left = left;
  44                 }
  45
  46                 public MemberName (MemberName left, MemberName right)
  47                         : this (left, right.Name)
  48                 {
  49                 }
  50
  51                 public string GetName ()
  52                 {
  53                         return GetName (false);
  54                 }
  55
  56                 public string GetName (bool is_generic)
  57                 {
  58                         string name = is_generic ? Basename : Name;
  59                         if (Left != null)
  60                                 return Left.GetName (is_generic) + "." + name;
  61                         else
  62                                 return name;
  63                 }
  64
  65                 ///
  66                 /// This returns exclusively the name as seen on the source code
  67                 /// it is not the fully qualifed type after resolution
  68                 ///
  69                 public string GetPartialName ()
  70                 {
  71                         if (Left != null)
  72                                 return Left.GetPartialName () + "." + Name;
  73                         else
  74                                 return Name;
  75                 }
  76
  77                 public string GetTypeName ()
  78                 {
  79                         if (Left != null)
  80                                 return Left.GetTypeName () + "." + Name;
  81                         else
  82                                 return Name;
  83                 }
  84
  85                 public Expression GetTypeExpression (Location loc)
  86                 {
  87                         if (Left != null) {
  88                                 Expression lexpr = Left.GetTypeExpression (loc);
  89
  90                                 return new MemberAccess (lexpr, Name, loc);
  91                         } else {
  92                                 return new SimpleName (Name, loc);
  93                         }
  94                 }
  95
  96                 public MemberName Clone ()
  97                 {
  98                         if (Left != null)
  99                                 return new MemberName (Left.Clone (), Name);
 100                         else
 101                                 return new MemberName (Name);
 102                 }
 103
 104                 public string Basename {
 105                         get {
 106                                 return Name;
 107                         }
 108                 }
 109
 110                 public override string ToString ()
 111                 {
 112                         if (Left != null)
 113                                 return Left + "." + Name;
 114                         else
 115                                 return Name;
 116                 }
 117         }
 118
 119         /// <summary>
 120         ///   Base representation for members.  This is used to keep track
 121         ///   of Name, Location and Modifier flags, and handling Attributes.
 122         /// </summary>
 123         public abstract class MemberCore : Attributable {
 124                 /// <summary>
 125                 ///   Public name
 126                 /// </summary>
 127                 public string Name {
 128                         get {
 129                                 // !(this is GenericMethod) && !(this is Method)
 130                                 return MemberName.GetName (false);
 131                         }
 132                 }
 133
 134                 // Is not readonly because of IndexerName attribute
 135                 public MemberName MemberName;
 136
 137                 /// <summary>
 138                 ///   Modifier flags that the user specified in the source code
 139                 /// </summary>
 140                 public int ModFlags;
 141
 142                 public readonly TypeContainer Parent;
 143
 144                 /// <summary>
 145                 ///   Location where this declaration happens
 146                 /// </summary>
 147                 public readonly Location Location;
 148
 149                 /// <summary>
 150                 ///   XML documentation comment
 151                 /// </summary>
 152                 public string DocComment;
 153
 154                 /// <summary>
 155                 ///   Represents header string for documentation comment
 156                 ///   for each member types.
 157                 /// </summary>
 158                 public abstract string DocCommentHeader { get; }
 159
 160                 [Flags]
 161                 public enum Flags {
 162                         Obsolete_Undetected = 1,                // Obsolete attribute has not been detected yet
 163                         Obsolete = 1 << 1,                      // Type has obsolete attribute
 164                         ClsCompliance_Undetected = 1 << 2,      // CLS Compliance has not been detected yet
 165                         ClsCompliant = 1 << 3,                  // Type is CLS Compliant
 166                         CloseTypeCreated = 1 << 4,              // Tracks whether we have Closed the type
 167                         HasCompliantAttribute_Undetected = 1 << 5,      // Presence of CLSCompliantAttribute has not been detected
 168                         HasClsCompliantAttribute = 1 << 6,                      // Type has CLSCompliantAttribute
 169                         ClsCompliantAttributeTrue = 1 << 7,                     // Type has CLSCompliant (true)
 170                         Excluded_Undetected = 1 << 8,           // Conditional attribute has not been detected yet
 171                         Excluded = 1 << 9,                                      // Method is conditional
 172                         TestMethodDuplication = 1 << 10         // Test for duplication must be performed
 173                 }
 174
 175                 /// <summary>
 176                 ///   MemberCore flags at first detected then cached
 177                 /// </summary>
 178                 internal Flags caching_flags;
 179
 180                 public MemberCore (TypeContainer parent, MemberName name, Attributes attrs,
 181                                    Location loc)
 182                         : base (attrs)
 183                 {
 184                         Parent = parent;
 185                         MemberName = name;
 186                         Location = loc;
 187                         caching_flags = Flags.Obsolete_Undetected | Flags.ClsCompliance_Undetected | Flags.HasCompliantAttribute_Undetected | Flags.Excluded_Undetected;
 188                 }
 189
 190                 /// <summary>
 191                 /// Tests presence of ObsoleteAttribute and report proper error
 192                 /// </summary>
 193                 protected void CheckUsageOfObsoleteAttribute (Type type)
 194                 {
 195                         if (type == null)
 196                                 return;
 197
 198                         ObsoleteAttribute obsolete_attr = AttributeTester.GetObsoleteAttribute (type);
 199                         if (obsolete_attr == null)
 200                                 return;
 201
 202                         AttributeTester.Report_ObsoleteMessage (obsolete_attr, type.FullName, Location);
 203                 }
 204
 205                 public abstract bool Define ();
 206
 207                 //
 208                 // Returns full member name for error message
 209                 //
 210                 public virtual string GetSignatureForError ()
 211                 {
 212                         return Name;
 213                 }
 214
 215                 /// <summary>
 216                 /// Use this method when MethodBuilder is null
 217                 /// </summary>
 218                 public virtual string GetSignatureForError (TypeContainer tc)
 219                 {
 220                         return Name;
 221                 }
 222
 223                 /// <summary>
 224                 /// Base Emit method. This is also entry point for CLS-Compliant verification.
 225                 /// </summary>
 226                 public virtual void Emit ()
 227                 {
 228                         // Hack with Parent == null is for EnumMember
 229                         if (Parent == null || (GetObsoleteAttribute (Parent) == null && Parent.GetObsoleteAttribute (Parent) == null))
 230                                 VerifyObsoleteAttribute ();
 231
 232                         if (!RootContext.VerifyClsCompliance)
 233                                 return;
 234
 235                         VerifyClsCompliance (Parent);
 236                 }
 237
 238                 public bool InUnsafe {
 239                         get {
 240                                 return ((ModFlags & Modifiers.UNSAFE) != 0) || Parent.UnsafeContext;
 241                         }
 242                 }
 243
 244                 //
 245                 // Whehter is it ok to use an unsafe pointer in this type container
 246                 //
 247                 public bool UnsafeOK (DeclSpace parent)
 248                 {
 249                         //
 250                         // First check if this MemberCore modifier flags has unsafe set
 251                         //
 252                         if ((ModFlags & Modifiers.UNSAFE) != 0)
 253                                 return true;
 254
 255                         if (parent.UnsafeContext)
 256                                 return true;
 257
 258                         Expression.UnsafeError (Location);
 259                         return false;
 260                 }
 261
 262                 /// <summary>
 263                 /// Returns instance of ObsoleteAttribute for this MemberCore
 264                 /// </summary>
 265                 public ObsoleteAttribute GetObsoleteAttribute (DeclSpace ds)
 266                 {
 267                         // ((flags & (Flags.Obsolete_Undetected | Flags.Obsolete)) == 0) is slower, but why ?
 268                         if ((caching_flags & Flags.Obsolete_Undetected) == 0 && (caching_flags & Flags.Obsolete) == 0) {
 269                                 return null;
 270                         }
 271
 272                         caching_flags &= ~Flags.Obsolete_Undetected;
 273
 274                         if (OptAttributes == null)
 275                                 return null;
 276
 277                         Attribute obsolete_attr = OptAttributes.Search (
 278                                 TypeManager.obsolete_attribute_type, ds.EmitContext);
 279                         if (obsolete_attr == null)
 280                                 return null;
 281
 282                         ObsoleteAttribute obsolete = obsolete_attr.GetObsoleteAttribute (ds);
 283                         if (obsolete == null)
 284                                 return null;
 285
 286                         caching_flags |= Flags.Obsolete;
 287                         return obsolete;
 288                 }
 289
 290                 /// <summary>
 291                 /// Analyze whether CLS-Compliant verification must be execute for this MemberCore.
 292                 /// </summary>
 293                 public override bool IsClsCompliaceRequired (DeclSpace container)
 294                 {
 295                         if ((caching_flags & Flags.ClsCompliance_Undetected) == 0)
 296                                 return (caching_flags & Flags.ClsCompliant) != 0;
 297
 298                         if (GetClsCompliantAttributeValue (container) && IsExposedFromAssembly (container)) {
 299                                 caching_flags &= ~Flags.ClsCompliance_Undetected;
 300                                 caching_flags |= Flags.ClsCompliant;
 301                                 return true;
 302                         }
 303
 304                         caching_flags &= ~Flags.ClsCompliance_Undetected;
 305                         return false;
 306                 }
 307
 308                 /// <summary>
 309                 /// Returns true when MemberCore is exposed from assembly.
 310                 /// </summary>
 311                 public bool IsExposedFromAssembly (DeclSpace ds)
 312                 {
 313                         if ((ModFlags & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
 314                                 return false;
 315
 316                         DeclSpace parentContainer = ds;
 317                         while (parentContainer != null && parentContainer.ModFlags != 0) {
 318                                 if ((parentContainer.ModFlags & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
 319                                         return false;
 320                                 parentContainer = parentContainer.Parent;
 321                         }
 322                         return true;
 323                 }
 324
 325                 /// <summary>
 326                 /// Resolve CLSCompliantAttribute value or gets cached value.
 327                 /// </summary>
 328                 bool GetClsCompliantAttributeValue (DeclSpace ds)
 329                 {
 330                         if (OptAttributes != null) {
 331                                 Attribute cls_attribute = OptAttributes.Search (
 332                                         TypeManager.cls_compliant_attribute_type, ds.EmitContext);
 333                                 if (cls_attribute != null) {
 334                                         caching_flags |= Flags.HasClsCompliantAttribute;
 335                                         return cls_attribute.GetClsCompliantAttributeValue (ds);
 336                                 }
 337                         }
 338                         return ds.GetClsCompliantAttributeValue ();
 339                 }
 340
 341                 /// <summary>
 342                 /// Returns true if MemberCore is explicitly marked with CLSCompliantAttribute
 343                 /// </summary>
 344                 protected bool HasClsCompliantAttribute {
 345                         get {
 346                                 return (caching_flags & Flags.HasClsCompliantAttribute) != 0;
 347                         }
 348                 }
 349
 350                 /// <summary>
 351                 /// The main virtual method for CLS-Compliant verifications.
 352                 /// The method returns true if member is CLS-Compliant and false if member is not
 353                 /// CLS-Compliant which means that CLS-Compliant tests are not necessary. A descendants override it
 354                 /// and add their extra verifications.
 355                 /// </summary>
 356                 protected virtual bool VerifyClsCompliance (DeclSpace ds)
 357                 {
 358                         if (!IsClsCompliaceRequired (ds)) {
 359                                 if ((RootContext.WarningLevel >= 2) && HasClsCompliantAttribute && !IsExposedFromAssembly (ds)) {
 360                                         Report.Warning (3019, Location, "CLS compliance checking will not be performed on '{0}' because it is private or internal", GetSignatureForError ());
 361                                 }
 362                                 return false;
 363                         }
 364
 365                         if (!CodeGen.Assembly.IsClsCompliant) {
 366                                 if (HasClsCompliantAttribute) {
 367                                         Report.Error (3014, Location, "'{0}' cannot be marked as CLS-compliant because the assembly does not have a CLSCompliant attribute", GetSignatureForError ());
 368                                 }
 369                                 return false;
 370                         }
 371
 372                         int index = Name.LastIndexOf ('.');
 373                         if (Name [index > 0 ? index + 1 : 0] == '_') {
 374                                 Report.Error (3008, Location, "Identifier '{0}' is not CLS-compliant", GetSignatureForError () );
 375                         }
 376                         return true;
 377                 }
 378
 379                 protected abstract void VerifyObsoleteAttribute ();
 380
 381                 //
 382                 // Raised (and passed an XmlElement that contains the comment)
 383                 // when GenerateDocComment is writing documentation expectedly.
 384                 //
 385                 internal virtual void OnGenerateDocComment (DeclSpace ds, XmlElement intermediateNode)
 386                 {
 387                 }
 388
 389                 //
 390                 // Returns a string that represents the signature for this
 391                 // member which should be used in XML documentation.
 392                 //
 393                 public virtual string GetDocCommentName (DeclSpace ds)
 394                 {
 395                         if (ds == null || this is DeclSpace)
 396                                 return DocCommentHeader + Name;
 397                         else
 398                                 return String.Concat (DocCommentHeader, ds.Name, ".", Name);
 399                 }
 400
 401                 //
 402                 // Generates xml doc comments (if any), and if required,
 403                 // handle warning report.
 404                 //
 405                 internal virtual void GenerateDocComment (DeclSpace ds)
 406                 {
 407                         DocUtil.GenerateDocComment (this, ds);
 408                 }
 409         }
 410
 411         /// <summary>
 412         ///   Base class for structs, classes, enumerations and interfaces.
 413         /// </summary>
 414         /// <remarks>
 415         ///   They all create new declaration spaces.  This
 416         ///   provides the common foundation for managing those name
 417         ///   spaces.
 418         /// </remarks>
 419         public abstract class DeclSpace : MemberCore, IAlias {
 420                 /// <summary>
 421                 ///   This points to the actual definition that is being
 422                 ///   created with System.Reflection.Emit
 423                 /// </summary>
 424                 public TypeBuilder TypeBuilder;
 425
 426                 //
 427                 // This is the namespace in which this typecontainer
 428                 // was declared.  We use this to resolve names.
 429                 //
 430                 public NamespaceEntry NamespaceEntry;
 431
 432                 public Hashtable Cache = new Hashtable ();
 433
 434                 public string Basename;
 435
 436                 protected Hashtable defined_names;
 437
 438                 // The emit context for toplevel objects.
 439                 protected EmitContext ec;
 440
 441                 public EmitContext EmitContext {
 442                         get { return ec; }
 443                 }
 444
 445                 static string[] attribute_targets = new string [] { "type" };
 446
 447                 public DeclSpace (NamespaceEntry ns, TypeContainer parent, MemberName name,
 448                                   Attributes attrs, Location l)
 449                         : base (parent, name, attrs, l)
 450                 {
 451                         NamespaceEntry = ns;
 452                         Basename = name.Name;
 453                         defined_names = new Hashtable ();
 454                 }
 455
 456                 /// <summary>
 457                 /// Adds the member to defined_names table. It tests for duplications and enclosing name conflicts
 458                 /// </summary>
 459                 protected bool AddToContainer (MemberCore symbol, bool is_method, string fullname, string basename)
 460                 {
 461                         if (basename == Basename && !(this is Interface)) {
 462                                 Report.SymbolRelatedToPreviousError (this);
 463                                 Report.Error (542, "'{0}': member names cannot be the same as their enclosing type", symbol.Location, symbol.GetSignatureForError ());
 464                                 return false;
 465                         }
 466
 467                         MemberCore mc = (MemberCore)defined_names [fullname];
 468
 469                         if (is_method && (mc is MethodCore || mc is IMethodData)) {
 470                                 symbol.caching_flags |= Flags.TestMethodDuplication;
 471                                 mc.caching_flags |= Flags.TestMethodDuplication;
 472                                 return true;
 473                         }
 474
 475                         if (mc != null) {
 476                                 Report.SymbolRelatedToPreviousError (mc);
 477                                 Report.Error (102, symbol.Location, "The type '{0}' already contains a definition for '{1}'", GetSignatureForError (), basename);
 478                                 return false;
 479                         }
 480
 481                         defined_names.Add (fullname, symbol);
 482                         return true;
 483                 }
 484
 485                 public void RecordDecl ()
 486                 {
 487                         if ((NamespaceEntry != null) && (Parent == RootContext.Tree.Types))
 488                                 NamespaceEntry.DefineName (MemberName.Basename, this);
 489                 }
 490
 491                 /// <summary>
 492                 ///   Returns the MemberCore associated with a given name in the declaration
 493                 ///   space. It doesn't return method based symbols !!
 494                 /// </summary>
 495                 ///
 496                 public MemberCore GetDefinition (string name)
 497                 {
 498                         return (MemberCore)defined_names [name];
 499                 }
 500
 501                 bool in_transit = false;
 502
 503                 /// <summary>
 504                 ///   This function is used to catch recursive definitions
 505                 ///   in declarations.
 506                 /// </summary>
 507                 public bool InTransit {
 508                         get {
 509                                 return in_transit;
 510                         }
 511
 512                         set {
 513                                 in_transit = value;
 514                         }
 515                 }
 516
 517                 /// <summary>
 518                 ///   Looks up the alias for the name
 519                 /// </summary>
 520                 public IAlias LookupAlias (string name)
 521                 {
 522                         if (NamespaceEntry != null)
 523                                 return NamespaceEntry.LookupAlias (name);
 524                         else
 525                                 return null;
 526                 }
 527
 528                 //
 529                 // root_types contains all the types.  All TopLevel types
 530                 // hence have a parent that points to `root_types', that is
 531                 // why there is a non-obvious test down here.
 532                 //
 533                 public bool IsTopLevel {
 534                         get {
 535                                 if (Parent != null){
 536                                         if (Parent.Parent == null)
 537                                                 return true;
 538                                 }
 539                                 return false;
 540                         }
 541                 }
 542
 543                 public virtual void CloseType ()
 544                 {
 545                         if ((caching_flags & Flags.CloseTypeCreated) == 0){
 546                                 try {
 547                                         TypeBuilder.CreateType ();
 548                                 } catch {
 549                                         //
 550                                         // The try/catch is needed because
 551                                         // nested enumerations fail to load when they
 552                                         // are defined.
 553                                         //
 554                                         // Even if this is the right order (enumerations
 555                                         // declared after types).
 556                                         //
 557                                         // Note that this still creates the type and
 558                                         // it is possible to save it
 559                                 }
 560                                 caching_flags |= Flags.CloseTypeCreated;
 561                         }
 562                 }
 563
 564                 /// <remarks>
 565                 ///  Should be overriten by the appropriate declaration space
 566                 /// </remarks>
 567                 public abstract TypeBuilder DefineType ();
 568
 569                 /// <summary>
 570                 ///   Define all members, but don't apply any attributes or do anything which may
 571                 ///   access not-yet-defined classes.  This method also creates the MemberCache.
 572                 /// </summary>
 573                 public abstract bool DefineMembers (TypeContainer parent);
 574
 575                 //
 576                 // Whether this is an `unsafe context'
 577                 //
 578                 public bool UnsafeContext {
 579                         get {
 580                                 if ((ModFlags & Modifiers.UNSAFE) != 0)
 581                                         return true;
 582                                 if (Parent != null)
 583                                         return Parent.UnsafeContext;
 584                                 return false;
 585                         }
 586                 }
 587
 588                 public static string MakeFQN (string nsn, string name)
 589                 {
 590                         if (nsn == "")
 591                                 return name;
 592                         return String.Concat (nsn, ".", name);
 593                 }
 594
 595                 EmitContext type_resolve_ec;
 596                 EmitContext GetTypeResolveEmitContext (TypeContainer parent, Location loc)
 597                 {
 598                         type_resolve_ec = new EmitContext (parent, this, loc, null, null, ModFlags, false);
 599                         type_resolve_ec.ResolvingTypeTree = true;
 600
 601                         return type_resolve_ec;
 602                 }
 603
 604                 // <summary>
 605                 //    Looks up the type, as parsed into the expression `e'.
 606                 // </summary>
 607                 //[Obsolete ("This method is going away soon")]
 608                 public Type ResolveType (Expression e, bool silent, Location loc)
 609                 {
 610                         TypeExpr d = ResolveTypeExpr (e, silent, loc);
 611                         return d == null ? null : d.Type;
 612                 }
 613
 614                 // <summary>
 615                 //    Resolves the expression `e' for a type, and will recursively define
 616                 //    types.  This should only be used for resolving base types.
 617                 // </summary>
 618                 public TypeExpr ResolveTypeExpr (Expression e, bool silent, Location loc)
 619                 {
 620                         if (type_resolve_ec == null)
 621                                 type_resolve_ec = GetTypeResolveEmitContext (Parent, loc);
 622                         type_resolve_ec.loc = loc;
 623                         type_resolve_ec.ContainerType = TypeBuilder;
 624
 625                         return e.ResolveAsTypeTerminal (type_resolve_ec, silent);
 626                 }
 627
 628                 public bool CheckAccessLevel (Type check_type)
 629                 {
 630                         if (check_type == TypeBuilder)
 631                                 return true;
 632
 633                         TypeAttributes check_attr = check_type.Attributes & TypeAttributes.VisibilityMask;
 634
 635                         //
 636                         // Broken Microsoft runtime, return public for arrays, no matter what
 637                         // the accessibility is for their underlying class, and they return
 638                         // NonPublic visibility for pointers
 639                         //
 640                         if (check_type.IsArray || check_type.IsPointer)
 641                                 return CheckAccessLevel (TypeManager.GetElementType (check_type));
 642
 643                         if (TypeBuilder == null)
 644                                 // FIXME: TypeBuilder will be null when invoked by Class.GetNormalBases().
 645                                 //        However, this is invoked again later -- so safe to return true.
 646                                 //        May also be null when resolving top-level attributes.
 647                                 return true;
 648
 649                         switch (check_attr){
 650                         case TypeAttributes.Public:
 651                                 return true;
 652
 653                         case TypeAttributes.NotPublic:
 654                                 //
 655                                 // This test should probably use the declaringtype.
 656                                 //
 657                                 return check_type.Assembly == TypeBuilder.Assembly;
 658
 659                         case TypeAttributes.NestedPublic:
 660                                 return true;
 661
 662                         case TypeAttributes.NestedPrivate:
 663                                 return NestedAccessible (check_type);
 664
 665                         case TypeAttributes.NestedFamily:
 666                                 return FamilyAccessible (check_type);
 667
 668                         case TypeAttributes.NestedFamANDAssem:
 669                                 return (check_type.Assembly == TypeBuilder.Assembly) &&
 670                                         FamilyAccessible (check_type);
 671
 672                         case TypeAttributes.NestedFamORAssem:
 673                                 return (check_type.Assembly == TypeBuilder.Assembly) ||
 674                                         FamilyAccessible (check_type);
 675
 676                         case TypeAttributes.NestedAssembly:
 677                                 return check_type.Assembly == TypeBuilder.Assembly;
 678                         }
 679
 680                         Console.WriteLine ("HERE: " + check_attr);
 681                         return false;
 682
 683                 }
 684
 685                 protected bool NestedAccessible (Type check_type)
 686                 {
 687                         string check_type_name = check_type.FullName;
 688
 689                         // At this point, we already know check_type is a nested class.
 690                         int cio = check_type_name.LastIndexOf ('+');
 691
 692                         // Ensure that the string 'container' has a '+' in it to avoid false matches
 693                         string container = check_type_name.Substring (0, cio + 1);
 694
 695                         // Ensure that type_name ends with a '+' so that it can match 'container', if necessary
 696                         string type_name = TypeBuilder.FullName + "+";
 697
 698                         // If the current class is nested inside the container of check_type,
 699                         // we can access check_type even if it is private or protected.
 700                         return type_name.StartsWith (container);
 701                 }
 702
 703                 protected bool FamilyAccessible (Type check_type)
 704                 {
 705                         Type declaring = check_type.DeclaringType;
 706                         if (TypeBuilder == declaring ||
 707                             TypeBuilder.IsSubclassOf (declaring))
 708                                 return true;
 709
 710                         return NestedAccessible (check_type);
 711                 }
 712
 713                 // Access level of a type.
 714                 const int X = 1;
 715                 enum AccessLevel { // Each column represents `is this scope larger or equal to Blah scope'
 716                                             // Public    Assembly   Protected
 717                         Protected           = (0 << 0) | (0 << 1) | (X << 2),
 718                         Public              = (X << 0) | (X << 1) | (X << 2),
 719                         Private             = (0 << 0) | (0 << 1) | (0 << 2),
 720                         Internal            = (0 << 0) | (X << 1) | (0 << 2),
 721                         ProtectedOrInternal = (0 << 0) | (X << 1) | (X << 2),
 722                 }
 723
 724                 static AccessLevel GetAccessLevelFromModifiers (int flags)
 725                 {
 726                         if ((flags & Modifiers.INTERNAL) != 0) {
 727
 728                                 if ((flags & Modifiers.PROTECTED) != 0)
 729                                         return AccessLevel.ProtectedOrInternal;
 730                                 else
 731                                         return AccessLevel.Internal;
 732
 733                         } else if ((flags & Modifiers.PROTECTED) != 0)
 734                                 return AccessLevel.Protected;
 735
 736                         else if ((flags & Modifiers.PRIVATE) != 0)
 737                                 return AccessLevel.Private;
 738
 739                         else
 740                                 return AccessLevel.Public;
 741                 }
 742
 743                 // What is the effective access level of this?
 744                 // TODO: Cache this?
 745                 AccessLevel EffectiveAccessLevel {
 746                         get {
 747                                 AccessLevel myAccess = GetAccessLevelFromModifiers (ModFlags);
 748                                 if (!IsTopLevel && (Parent != null))
 749                                         return myAccess & Parent.EffectiveAccessLevel;
 750                                 else
 751                                         return myAccess;
 752                         }
 753                 }
 754
 755                 // Return the access level for type `t'
 756                 static AccessLevel TypeEffectiveAccessLevel (Type t)
 757                 {
 758                         if (t.IsPublic)
 759                                 return AccessLevel.Public;
 760                         if (t.IsNestedPrivate)
 761                                 return AccessLevel.Private;
 762                         if (t.IsNotPublic)
 763                                 return AccessLevel.Internal;
 764
 765                         // By now, it must be nested
 766                         AccessLevel parentLevel = TypeEffectiveAccessLevel (t.DeclaringType);
 767
 768                         if (t.IsNestedPublic)
 769                                 return parentLevel;
 770                         if (t.IsNestedAssembly)
 771                                 return parentLevel & AccessLevel.Internal;
 772                         if (t.IsNestedFamily)
 773                                 return parentLevel & AccessLevel.Protected;
 774                         if (t.IsNestedFamORAssem)
 775                                 return parentLevel & AccessLevel.ProtectedOrInternal;
 776                         if (t.IsNestedFamANDAssem)
 777                                 throw new NotImplementedException ("NestedFamANDAssem not implemented, cant make this kind of type from c# anyways");
 778
 779                         // nested private is taken care of
 780
 781                         throw new Exception ("I give up, what are you?");
 782                 }
 783
 784                 //
 785                 // This answers `is the type P, as accessible as a member M which has the
 786                 // accessability @flags which is declared as a nested member of the type T, this declspace'
 787                 //
 788                 public bool AsAccessible (Type p, int flags)
 789                 {
 790                         //
 791                         // 1) if M is private, its accessability is the same as this declspace.
 792                         // we already know that P is accessible to T before this method, so we
 793                         // may return true.
 794                         //
 795
 796                         if ((flags & Modifiers.PRIVATE) != 0)
 797                                 return true;
 798
 799                         while (p.IsArray || p.IsPointer || p.IsByRef)
 800                                 p = TypeManager.GetElementType (p);
 801
 802                         AccessLevel pAccess = TypeEffectiveAccessLevel (p);
 803                         AccessLevel mAccess = this.EffectiveAccessLevel &
 804                                 GetAccessLevelFromModifiers (flags);
 805
 806                         // for every place from which we can access M, we must
 807                         // be able to access P as well. So, we want
 808                         // For every bit in M and P, M_i -> P_1 == true
 809                         // or, ~ (M -> P) == 0 <-> ~ ( ~M | P) == 0
 810
 811                         return ~ (~ mAccess | pAccess) == 0;
 812                 }
 813
 814                 static DoubleHash dh = new DoubleHash (1000);
 815
 816                 Type DefineTypeAndParents (DeclSpace tc)
 817                 {
 818                         DeclSpace container = tc.Parent;
 819
 820                         if (container.TypeBuilder == null && container.Name != "")
 821                                 DefineTypeAndParents (container);
 822
 823                         return tc.DefineType ();
 824                 }
 825
 826                 Type LookupInterfaceOrClass (string ns, string name, out bool error)
 827                 {
 828                         DeclSpace parent;
 829                         Type t;
 830                         object r;
 831
 832                         error = false;
 833                         int p = name.LastIndexOf ('.');
 834
 835                         if (dh.Lookup (ns, name, out r))
 836                                 return (Type) r;
 837                         else {
 838                                 //
 839                                 // If the type is not a nested type, we do not need `LookupType's processing.
 840                                 // If the @name does not have a `.' in it, this cant be a nested type.
 841                                 //
 842                                 if (ns != ""){
 843                                         if (Namespace.IsNamespace (ns)) {
 844                                                 if (p != -1)
 845                                                         t = TypeManager.LookupType (ns + "." + name);
 846                                                 else
 847                                                         t = TypeManager.LookupTypeDirect (ns + "." + name);
 848                                         } else
 849                                                 t = null;
 850                                 } else if (p != -1)
 851                                         t = TypeManager.LookupType (name);
 852                                 else
 853                                         t = TypeManager.LookupTypeDirect (name);
 854                         }
 855
 856                         if (t != null) {
 857                                 dh.Insert (ns, name, t);
 858                                 return t;
 859                         }
 860
 861                         //
 862                         // In case we are fed a composite name, normalize it.
 863                         //
 864
 865                         if (p != -1){
 866                                 ns = MakeFQN (ns, name.Substring (0, p));
 867                                 name = name.Substring (p+1);
 868                         }
 869
 870                         parent = RootContext.Tree.LookupByNamespace (ns, name);
 871                         if (parent == null) {
 872                                 dh.Insert (ns, name, null);
 873                                 return null;
 874                         }
 875
 876                         t = DefineTypeAndParents (parent);
 877                         if (t == null){
 878                                 error = true;
 879                                 return null;
 880                         }
 881
 882                         dh.Insert (ns, name, t);
 883                         return t;
 884                 }
 885
 886                 public static void Error_AmbiguousTypeReference (Location loc, string name, string t1, string t2)
 887                 {
 888                         Report.Error (104, loc,
 889                                       "`{0}' is an ambiguous reference ({1} or {2})",
 890                                       name, t1, t2);
 891                 }
 892
 893                 /// <summary>
 894                 ///   GetType is used to resolve type names at the DeclSpace level.
 895                 ///   Use this to lookup class/struct bases, interface bases or
 896                 ///   delegate type references
 897                 /// </summary>
 898                 ///
 899                 /// <remarks>
 900                 ///   Contrast this to LookupType which is used inside method bodies to
 901                 ///   lookup types that have already been defined.  GetType is used
 902                 ///   during the tree resolution process and potentially define
 903                 ///   recursively the type
 904                 /// </remarks>
 905                 public Type FindType (Location loc, string name)
 906                 {
 907                         Type t;
 908                         bool error;
 909
 910                         //
 911                         // For the case the type we are looking for is nested within this one
 912                         // or is in any base class
 913                         //
 914                         DeclSpace containing_ds = this;
 915
 916                         while (containing_ds != null){
 917                                 Type container_type = containing_ds.TypeBuilder;
 918                                 Type current_type = container_type;
 919
 920                                 while (current_type != null && current_type != TypeManager.object_type) {
 921                                         string pre = current_type.FullName;
 922
 923                                         t = LookupInterfaceOrClass (pre, name, out error);
 924                                         if (error)
 925                                                 return null;
 926
 927                                         if ((t != null) && containing_ds.CheckAccessLevel (t))
 928                                                 return t;
 929
 930                                         current_type = current_type.BaseType;
 931                                 }
 932                                 containing_ds = containing_ds.Parent;
 933                         }
 934
 935                         //
 936                         // Attempt to lookup the class on our namespace and all it's implicit parents
 937                         //
 938                         for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.ImplicitParent) {
 939                                 t = LookupInterfaceOrClass (ns.FullName, name, out error);
 940                                 if (error)
 941                                         return null;
 942
 943                                 if (t != null)
 944                                         return t;
 945                         }
 946
 947                         //
 948                         // Attempt to do a direct unqualified lookup
 949                         //
 950                         t = LookupInterfaceOrClass ("", name, out error);
 951                         if (error)
 952                                 return null;
 953
 954                         if (t != null)
 955                                 return t;
 956
 957                         //
 958                         // Attempt to lookup the class on any of the `using'
 959                         // namespaces
 960                         //
 961
 962                         for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.Parent){
 963
 964                                 t = LookupInterfaceOrClass (ns.FullName, name, out error);
 965                                 if (error)
 966                                         return null;
 967
 968                                 if (t != null)
 969                                         return t;
 970
 971                                 if (name.IndexOf ('.') > 0)
 972                                         continue;
 973
 974                                 IAlias alias_value = ns.LookupAlias (name);
 975                                 if (alias_value != null) {
 976                                         t = LookupInterfaceOrClass ("", alias_value.Name, out error);
 977                                         if (error)
 978                                                 return null;
 979
 980                                         if (t != null)
 981                                                 return t;
 982                                 }
 983
 984                                 //
 985                                 // Now check the using clause list
 986                                 //
 987                                 Type match = null;
 988                                 foreach (Namespace using_ns in ns.GetUsingTable ()) {
 989                                         match = LookupInterfaceOrClass (using_ns.Name, name, out error);
 990                                         if (error)
 991                                                 return null;
 992
 993                                         if (match != null){
 994                                                 if (t != null){
 995                                                         if (CheckAccessLevel (match)) {
 996                                                                 Error_AmbiguousTypeReference (loc, name, t.FullName, match.FullName);
 997                                                                 return null;
 998                                                         }
 999                                                         continue;
1000                                                 }
1001
1002                                                 t = match;
1003                                         }
1004                                 }
1005                                 if (t != null)
1006                                         return t;
1007                         }
1008
1009                         //Report.Error (246, Location, "Can not find type `"+name+"'");
1010                         return null;
1011                 }
1012
1013                 /// <remarks>
1014                 ///   This function is broken and not what you're looking for.  It should only
1015                 ///   be used while the type is still being created since it doesn't use the cache
1016                 ///   and relies on the filter doing the member name check.
1017                 /// </remarks>
1018                 public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
1019                                                         MemberFilter filter, object criteria);
1020
1021                 /// <remarks>
1022                 ///   If we have a MemberCache, return it.  This property may return null if the
1023                 ///   class doesn't have a member cache or while it's still being created.
1024                 /// </remarks>
1025                 public abstract MemberCache MemberCache {
1026                         get;
1027                 }
1028
1029                 public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
1030                 {
1031                         try {
1032                                 TypeBuilder.SetCustomAttribute (cb);
1033                         } catch (System.ArgumentException e) {
1034                                 Report.Warning (-21, a.Location,
1035                                                 "The CharSet named property on StructLayout\n"+
1036                                                 "\tdoes not work correctly on Microsoft.NET\n"+
1037                                                 "\tYou might want to remove the CharSet declaration\n"+
1038                                                 "\tor compile using the Mono runtime instead of the\n"+
1039                                                 "\tMicrosoft .NET runtime\n"+
1040                                                 "\tThe runtime gave the error: " + e);
1041                         }
1042                 }
1043
1044                 /// <summary>
1045                 /// Goes through class hierarchy and get value of first CLSCompliantAttribute that found.
1046                 /// If no is attribute exists then return assembly CLSCompliantAttribute.
1047                 /// </summary>
1048                 public bool GetClsCompliantAttributeValue ()
1049                 {
1050                         if ((caching_flags & Flags.HasCompliantAttribute_Undetected) == 0)
1051                                 return (caching_flags & Flags.ClsCompliantAttributeTrue) != 0;
1052
1053                         caching_flags &= ~Flags.HasCompliantAttribute_Undetected;
1054
1055                         if (OptAttributes != null) {
1056                                 Attribute cls_attribute = OptAttributes.Search (TypeManager.cls_compliant_attribute_type, ec);
1057                                 if (cls_attribute != null) {
1058                                         caching_flags |= Flags.HasClsCompliantAttribute;
1059                                         if (cls_attribute.GetClsCompliantAttributeValue (this)) {
1060                                                 caching_flags |= Flags.ClsCompliantAttributeTrue;
1061                                                 return true;
1062                                         }
1063                                         return false;
1064                                 }
1065                         }
1066
1067                         if (Parent == null) {
1068                                 if (CodeGen.Assembly.IsClsCompliant) {
1069                                         caching_flags |= Flags.ClsCompliantAttributeTrue;
1070                                         return true;
1071                                 }
1072                                 return false;
1073                         }
1074
1075                         if (Parent.GetClsCompliantAttributeValue ()) {
1076                                 caching_flags |= Flags.ClsCompliantAttributeTrue;
1077                                 return true;
1078                         }
1079                         return false;
1080                 }
1081
1082                 public override string[] ValidAttributeTargets {
1083                         get {
1084                                 return attribute_targets;
1085                         }
1086                 }
1087
1088                 bool IAlias.IsType {
1089                         get { return true; }
1090                 }
1091
1092                 string IAlias.Name {
1093                         get { return Name; }
1094                 }
1095
1096                 TypeExpr IAlias.ResolveAsType (EmitContext ec)
1097                 {
1098                         if (TypeBuilder == null)
1099                                 throw new InvalidOperationException ();
1100
1101                         return new TypeExpression (TypeBuilder, Location);
1102                 }
1103         }
1104
1105         /// <summary>
1106         ///   This is a readonly list of MemberInfo's.
1107         /// </summary>
1108         public class MemberList : IList {
1109                 public readonly IList List;
1110                 int count;
1111
1112                 /// <summary>
1113                 ///   Create a new MemberList from the given IList.
1114                 /// </summary>
1115                 public MemberList (IList list)
1116                 {
1117                         if (list != null)
1118                                 this.List = list;
1119                         else
1120                                 this.List = new ArrayList ();
1121                         count = List.Count;
1122                 }
1123
1124                 /// <summary>
1125                 ///   Concatenate the ILists `first' and `second' to a new MemberList.
1126                 /// </summary>
1127                 public MemberList (IList first, IList second)
1128                 {
1129                         ArrayList list = new ArrayList ();
1130                         list.AddRange (first);
1131                         list.AddRange (second);
1132                         count = list.Count;
1133                         List = list;
1134                 }
1135
1136                 public static readonly MemberList Empty = new MemberList (new ArrayList ());
1137
1138                 /// <summary>
1139                 ///   Cast the MemberList into a MemberInfo[] array.
1140                 /// </summary>
1141                 /// <remarks>
1142                 ///   This is an expensive operation, only use it if it's really necessary.
1143                 /// </remarks>
1144                 public static explicit operator MemberInfo [] (MemberList list)
1145                 {
1146                         Timer.StartTimer (TimerType.MiscTimer);
1147                         MemberInfo [] result = new MemberInfo [list.Count];
1148                         list.CopyTo (result, 0);
1149                         Timer.StopTimer (TimerType.MiscTimer);
1150                         return result;
1151                 }
1152
1153                 // ICollection
1154
1155                 public int Count {
1156                         get {
1157                                 return count;
1158                         }
1159                 }
1160
1161                 public bool IsSynchronized {
1162                         get {
1163                                 return List.IsSynchronized;
1164                         }
1165                 }
1166
1167                 public object SyncRoot {
1168                         get {
1169                                 return List.SyncRoot;
1170                         }
1171                 }
1172
1173                 public void CopyTo (Array array, int index)
1174                 {
1175                         List.CopyTo (array, index);
1176                 }
1177
1178                 // IEnumerable
1179
1180                 public IEnumerator GetEnumerator ()
1181                 {
1182                         return List.GetEnumerator ();
1183                 }
1184
1185                 // IList
1186
1187                 public bool IsFixedSize {
1188                         get {
1189                                 return true;
1190                         }
1191                 }
1192
1193                 public bool IsReadOnly {
1194                         get {
1195                                 return true;
1196                         }
1197                 }
1198
1199                 object IList.this [int index] {
1200                         get {
1201                                 return List [index];
1202                         }
1203
1204                         set {
1205                                 throw new NotSupportedException ();
1206                         }
1207                 }
1208
1209                 // FIXME: try to find out whether we can avoid the cast in this indexer.
1210                 public MemberInfo this [int index] {
1211                         get {
1212                                 return (MemberInfo) List [index];
1213                         }
1214                 }
1215
1216                 public int Add (object value)
1217                 {
1218                         throw new NotSupportedException ();
1219                 }
1220
1221                 public void Clear ()
1222                 {
1223                         throw new NotSupportedException ();
1224                 }
1225
1226                 public bool Contains (object value)
1227                 {
1228                         return List.Contains (value);
1229                 }
1230
1231                 public int IndexOf (object value)
1232                 {
1233                         return List.IndexOf (value);
1234                 }
1235
1236                 public void Insert (int index, object value)
1237                 {
1238                         throw new NotSupportedException ();
1239                 }
1240
1241                 public void Remove (object value)
1242                 {
1243                         throw new NotSupportedException ();
1244                 }
1245
1246                 public void RemoveAt (int index)
1247                 {
1248                         throw new NotSupportedException ();
1249                 }
1250         }
1251
1252         /// <summary>
1253         ///   This interface is used to get all members of a class when creating the
1254         ///   member cache.  It must be implemented by all DeclSpace derivatives which
1255         ///   want to support the member cache and by TypeHandle to get caching of
1256         ///   non-dynamic types.
1257         /// </summary>
1258         public interface IMemberContainer {
1259                 /// <summary>
1260                 ///   The name of the IMemberContainer.  This is only used for
1261                 ///   debugging purposes.
1262                 /// </summary>
1263                 string Name {
1264                         get;
1265                 }
1266
1267                 /// <summary>
1268                 ///   The type of this IMemberContainer.
1269                 /// </summary>
1270                 Type Type {
1271                         get;
1272                 }
1273
1274                 /// <summary>
1275                 ///   Returns the IMemberContainer of the parent class or null if this
1276                 ///   is an interface or TypeManger.object_type.
1277                 ///   This is used when creating the member cache for a class to get all
1278                 ///   members from the parent class.
1279                 /// </summary>
1280                 MemberCache ParentCache {
1281                         get;
1282                 }
1283
1284                 /// <summary>
1285                 ///   Whether this is an interface.
1286                 /// </summary>
1287                 bool IsInterface {
1288                         get;
1289                 }
1290
1291                 /// <summary>
1292                 ///   Returns all members of this class with the corresponding MemberTypes
1293                 ///   and BindingFlags.
1294                 /// </summary>
1295                 /// <remarks>
1296                 ///   When implementing this method, make sure not to return any inherited
1297                 ///   members and check the MemberTypes and BindingFlags properly.
1298                 ///   Unfortunately, System.Reflection is lame and doesn't provide a way to
1299                 ///   get the BindingFlags (static/non-static,public/non-public) in the
1300                 ///   MemberInfo class, but the cache needs this information.  That's why
1301                 ///   this method is called multiple times with different BindingFlags.
1302                 /// </remarks>
1303                 MemberList GetMembers (MemberTypes mt, BindingFlags bf);
1304
1305                 /// <summary>
1306                 ///   Return the container's member cache.
1307                 /// </summary>
1308                 MemberCache MemberCache {
1309                         get;
1310                 }
1311         }
1312
1313         /// <summary>
1314         ///   The MemberCache is used by dynamic and non-dynamic types to speed up
1315         ///   member lookups.  It has a member name based hash table; it maps each member
1316         ///   name to a list of CacheEntry objects.  Each CacheEntry contains a MemberInfo
1317         ///   and the BindingFlags that were initially used to get it.  The cache contains
1318         ///   all members of the current class and all inherited members.  If this cache is
1319         ///   for an interface types, it also contains all inherited members.
1320         ///
1321         ///   There are two ways to get a MemberCache:
1322         ///   * if this is a dynamic type, lookup the corresponding DeclSpace and then
1323         ///     use the DeclSpace.MemberCache property.
1324         ///   * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
1325         ///     TypeHandle instance for the type and then use TypeHandle.MemberCache.
1326         /// </summary>
1327         public class MemberCache {
1328                 public readonly IMemberContainer Container;
1329                 protected Hashtable member_hash;
1330                 protected Hashtable method_hash;
1331
1332                 /// <summary>
1333                 ///   Create a new MemberCache for the given IMemberContainer `container'.
1334                 /// </summary>
1335                 public MemberCache (IMemberContainer container)
1336                 {
1337                         this.Container = container;
1338
1339                         Timer.IncrementCounter (CounterType.MemberCache);
1340                         Timer.StartTimer (TimerType.CacheInit);
1341
1342                         // If we have a parent class (we have a parent class unless we're
1343                         // TypeManager.object_type), we deep-copy its MemberCache here.
1344                         if (Container.ParentCache != null)
1345                                 member_hash = SetupCache (Container.ParentCache);
1346                         else
1347                                 member_hash = new Hashtable ();
1348
1349                         // If this is neither a dynamic type nor an interface, create a special
1350                         // method cache with all declared and inherited methods.
1351                         Type type = container.Type;
1352                         if (!(type is TypeBuilder) && !type.IsInterface) {
1353                                 method_hash = new Hashtable ();
1354                                 AddMethods (type);
1355                         }
1356
1357                         // Add all members from the current class.
1358                         AddMembers (Container);
1359
1360                         Timer.StopTimer (TimerType.CacheInit);
1361                 }
1362
1363                 public MemberCache (Type[] ifaces)
1364                 {
1365                         //
1366                         // The members of this cache all belong to other caches.
1367                         // So, 'Container' will not be used.
1368                         //
1369                         this.Container = null;
1370
1371                         member_hash = new Hashtable ();
1372                         if (ifaces == null)
1373                                 return;
1374
1375                         foreach (Type itype in ifaces)
1376                                 AddCacheContents (TypeManager.LookupMemberCache (itype));
1377                 }
1378
1379                 /// <summary>
1380                 ///   Bootstrap this member cache by doing a deep-copy of our parent.
1381                 /// </summary>
1382                 Hashtable SetupCache (MemberCache parent)
1383                 {
1384                         Hashtable hash = new Hashtable ();
1385
1386                         if (parent == null)
1387                                 return hash;
1388
1389                         IDictionaryEnumerator it = parent.member_hash.GetEnumerator ();
1390                         while (it.MoveNext ()) {
1391                                 hash [it.Key] = ((ArrayList) it.Value).Clone ();
1392                          }
1393
1394                         return hash;
1395                 }
1396
1397                 /// <summary>
1398                 ///   Add the contents of `cache' to the member_hash.
1399                 /// </summary>
1400                 void AddCacheContents (MemberCache cache)
1401                 {
1402                         IDictionaryEnumerator it = cache.member_hash.GetEnumerator ();
1403                         while (it.MoveNext ()) {
1404                                 ArrayList list = (ArrayList) member_hash [it.Key];
1405                                 if (list == null)
1406                                         member_hash [it.Key] = list = new ArrayList ();
1407
1408                                 ArrayList entries = (ArrayList) it.Value;
1409                                 for (int i = entries.Count-1; i >= 0; i--) {
1410                                         CacheEntry entry = (CacheEntry) entries [i];
1411
1412                                         if (entry.Container != cache.Container)
1413                                                 break;
1414                                         list.Add (entry);
1415                                 }
1416                         }
1417                 }
1418
1419                 /// <summary>
1420                 ///   Add all members from class `container' to the cache.
1421                 /// </summary>
1422                 void AddMembers (IMemberContainer container)
1423                 {
1424                         // We need to call AddMembers() with a single member type at a time
1425                         // to get the member type part of CacheEntry.EntryType right.
1426                         if (!container.IsInterface) {
1427                                 AddMembers (MemberTypes.Constructor, container);
1428                                 AddMembers (MemberTypes.Field, container);
1429                         }
1430                         AddMembers (MemberTypes.Method, container);
1431                         AddMembers (MemberTypes.Property, container);
1432                         AddMembers (MemberTypes.Event, container);
1433                         // Nested types are returned by both Static and Instance searches.
1434                         AddMembers (MemberTypes.NestedType,
1435                                     BindingFlags.Static | BindingFlags.Public, container);
1436                         AddMembers (MemberTypes.NestedType,
1437                                     BindingFlags.Static | BindingFlags.NonPublic, container);
1438                 }
1439
1440                 void AddMembers (MemberTypes mt, IMemberContainer container)
1441                 {
1442                         AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
1443                         AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
1444                         AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
1445                         AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
1446                 }
1447
1448                 /// <summary>
1449                 ///   Add all members from class `container' with the requested MemberTypes and
1450                 ///   BindingFlags to the cache.  This method is called multiple times with different
1451                 ///   MemberTypes and BindingFlags.
1452                 /// </summary>
1453                 void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
1454                 {
1455                         MemberList members = container.GetMembers (mt, bf);
1456
1457                         foreach (MemberInfo member in members) {
1458                                 string name = member.Name;
1459
1460                                 // We use a name-based hash table of ArrayList's.
1461                                 ArrayList list = (ArrayList) member_hash [name];
1462                                 if (list == null) {
1463                                         list = new ArrayList ();
1464                                         member_hash.Add (name, list);
1465                                 }
1466
1467                                 // When this method is called for the current class, the list will
1468                                 // already contain all inherited members from our parent classes.
1469                                 // We cannot add new members in front of the list since this'd be an
1470                                 // expensive operation, that's why the list is sorted in reverse order
1471                                 // (ie. members from the current class are coming last).
1472                                 list.Add (new CacheEntry (container, member, mt, bf));
1473                         }
1474                 }
1475
1476                 /// <summary>
1477                 ///   Add all declared and inherited methods from class `type' to the method cache.
1478                 /// </summary>
1479                 void AddMethods (Type type)
1480                 {
1481                         AddMethods (BindingFlags.Static | BindingFlags.Public |
1482                                     BindingFlags.FlattenHierarchy, type);
1483                         AddMethods (BindingFlags.Static | BindingFlags.NonPublic |
1484                                     BindingFlags.FlattenHierarchy, type);
1485                         AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
1486                         AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
1487                 }
1488
1489                 void AddMethods (BindingFlags bf, Type type)
1490                 {
1491                         MemberInfo [] members = type.GetMethods (bf);
1492
1493                         Array.Reverse (members);
1494
1495                         foreach (MethodBase member in members) {
1496                                 string name = member.Name;
1497
1498                                 // We use a name-based hash table of ArrayList's.
1499                                 ArrayList list = (ArrayList) method_hash [name];
1500                                 if (list == null) {
1501                                         list = new ArrayList ();
1502                                         method_hash.Add (name, list);
1503                                 }
1504
1505                                 // Unfortunately, the elements returned by Type.GetMethods() aren't
1506                                 // sorted so we need to do this check for every member.
1507                                 BindingFlags new_bf = bf;
1508                                 if (member.DeclaringType == type)
1509                                         new_bf |= BindingFlags.DeclaredOnly;
1510
1511                                 list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
1512                         }
1513
1514
1515                 }
1516
1517                 /// <summary>
1518                 ///   Compute and return a appropriate `EntryType' magic number for the given
1519                 ///   MemberTypes and BindingFlags.
1520                 /// </summary>
1521                 protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
1522                 {
1523                         EntryType type = EntryType.None;
1524
1525                         if ((mt & MemberTypes.Constructor) != 0)
1526                                 type |= EntryType.Constructor;
1527                         if ((mt & MemberTypes.Event) != 0)
1528                                 type |= EntryType.Event;
1529                         if ((mt & MemberTypes.Field) != 0)
1530                                 type |= EntryType.Field;
1531                         if ((mt & MemberTypes.Method) != 0)
1532                                 type |= EntryType.Method;
1533                         if ((mt & MemberTypes.Property) != 0)
1534                                 type |= EntryType.Property;
1535                         // Nested types are returned by static and instance searches.
1536                         if ((mt & MemberTypes.NestedType) != 0)
1537                                 type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;
1538
1539                         if ((bf & BindingFlags.Instance) != 0)
1540                                 type |= EntryType.Instance;
1541                         if ((bf & BindingFlags.Static) != 0)
1542                                 type |= EntryType.Static;
1543                         if ((bf & BindingFlags.Public) != 0)
1544                                 type |= EntryType.Public;
1545                         if ((bf & BindingFlags.NonPublic) != 0)
1546                                 type |= EntryType.NonPublic;
1547                         if ((bf & BindingFlags.DeclaredOnly) != 0)
1548                                 type |= EntryType.Declared;
1549
1550                         return type;
1551                 }
1552
1553                 /// <summary>
1554                 ///   The `MemberTypes' enumeration type is a [Flags] type which means that it may
1555                 ///   denote multiple member types.  Returns true if the given flags value denotes a
1556                 ///   single member types.
1557                 /// </summary>
1558                 public static bool IsSingleMemberType (MemberTypes mt)
1559                 {
1560                         switch (mt) {
1561                         case MemberTypes.Constructor:
1562                         case MemberTypes.Event:
1563                         case MemberTypes.Field:
1564                         case MemberTypes.Method:
1565                         case MemberTypes.Property:
1566                         case MemberTypes.NestedType:
1567                                 return true;
1568
1569                         default:
1570                                 return false;
1571                         }
1572                 }
1573
1574                 /// <summary>
1575                 ///   We encode the MemberTypes and BindingFlags of each members in a "magic"
1576                 ///   number to speed up the searching process.
1577                 /// </summary>
1578                 [Flags]
1579                 protected enum EntryType {
1580                         None            = 0x000,
1581
1582                         Instance        = 0x001,
1583                         Static          = 0x002,
1584                         MaskStatic      = Instance|Static,
1585
1586                         Public          = 0x004,
1587                         NonPublic       = 0x008,
1588                         MaskProtection  = Public|NonPublic,
1589
1590                         Declared        = 0x010,
1591
1592                         Constructor     = 0x020,
1593                         Event           = 0x040,
1594                         Field           = 0x080,
1595                         Method          = 0x100,
1596                         Property        = 0x200,
1597                         NestedType      = 0x400,
1598
1599                         MaskType        = Constructor|Event|Field|Method|Property|NestedType
1600                 }
1601
1602                 protected struct CacheEntry {
1603                         public readonly IMemberContainer Container;
1604                         public readonly EntryType EntryType;
1605                         public readonly MemberInfo Member;
1606
1607                         public CacheEntry (IMemberContainer container, MemberInfo member,
1608                                            MemberTypes mt, BindingFlags bf)
1609                         {
1610                                 this.Container = container;
1611                                 this.Member = member;
1612                                 this.EntryType = GetEntryType (mt, bf);
1613                         }
1614
1615                         public override string ToString ()
1616                         {
1617                                 return String.Format ("CacheEntry ({0}:{1}:{2})", Container.Name,
1618                                                       EntryType, Member);
1619                         }
1620                 }
1621
1622                 /// <summary>
1623                 ///   This is called each time we're walking up one level in the class hierarchy
1624                 ///   and checks whether we can abort the search since we've already found what
1625                 ///   we were looking for.
1626                 /// </summary>
1627                 protected bool DoneSearching (ArrayList list)
1628                 {
1629                         //
1630                         // We've found exactly one member in the current class and it's not
1631                         // a method or constructor.
1632                         //
1633                         if (list.Count == 1 && !(list [0] is MethodBase))
1634                                 return true;
1635
1636                         //
1637                         // Multiple properties: we query those just to find out the indexer
1638                         // name
1639                         //
1640                         if ((list.Count > 0) && (list [0] is PropertyInfo))
1641                                 return true;
1642
1643                         return false;
1644                 }
1645
1646                 /// <summary>
1647                 ///   Looks up members with name `name'.  If you provide an optional
1648                 ///   filter function, it'll only be called with members matching the
1649                 ///   requested member name.
1650                 ///
1651                 ///   This method will try to use the cache to do the lookup if possible.
1652                 ///
1653                 ///   Unlike other FindMembers implementations, this method will always
1654                 ///   check all inherited members - even when called on an interface type.
1655                 ///
1656                 ///   If you know that you're only looking for methods, you should use
1657                 ///   MemberTypes.Method alone since this speeds up the lookup a bit.
1658                 ///   When doing a method-only search, it'll try to use a special method
1659                 ///   cache (unless it's a dynamic type or an interface) and the returned
1660                 ///   MemberInfo's will have the correct ReflectedType for inherited methods.
1661                 ///   The lookup process will automatically restart itself in method-only
1662                 ///   search mode if it discovers that it's about to return methods.
1663                 /// </summary>
1664                 ArrayList global = new ArrayList ();
1665                 bool using_global = false;
1666
1667                 static MemberInfo [] emptyMemberInfo = new MemberInfo [0];
1668
1669                 public MemberInfo [] FindMembers (MemberTypes mt, BindingFlags bf, string name,
1670                                                   MemberFilter filter, object criteria)
1671                 {
1672                         if (using_global)
1673                                 throw new Exception ();
1674
1675                         bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
1676                         bool method_search = mt == MemberTypes.Method;
1677                         // If we have a method cache and we aren't already doing a method-only search,
1678                         // then we restart a method search if the first match is a method.
1679                         bool do_method_search = !method_search && (method_hash != null);
1680
1681                         ArrayList applicable;
1682
1683                         // If this is a method-only search, we try to use the method cache if
1684                         // possible; a lookup in the method cache will return a MemberInfo with
1685                         // the correct ReflectedType for inherited methods.
1686
1687                         if (method_search && (method_hash != null))
1688                                 applicable = (ArrayList) method_hash [name];
1689                         else
1690                                 applicable = (ArrayList) member_hash [name];
1691
1692                         if (applicable == null)
1693                                 return emptyMemberInfo;
1694
1695                         //
1696                         // 32  slots gives 53 rss/54 size
1697                         // 2/4 slots gives 55 rss
1698                         //
1699                         // Strange: from 25,000 calls, only 1,800
1700                         // are above 2.  Why does this impact it?
1701                         //
1702                         global.Clear ();
1703                         using_global = true;
1704
1705                         Timer.StartTimer (TimerType.CachedLookup);
1706
1707                         EntryType type = GetEntryType (mt, bf);
1708
1709                         IMemberContainer current = Container;
1710
1711
1712                         // `applicable' is a list of all members with the given member name `name'
1713                         // in the current class and all its parent classes.  The list is sorted in
1714                         // reverse order due to the way how the cache is initialy created (to speed
1715                         // things up, we're doing a deep-copy of our parent).
1716
1717                         for (int i = applicable.Count-1; i >= 0; i--) {
1718                                 CacheEntry entry = (CacheEntry) applicable [i];
1719
1720                                 // This happens each time we're walking one level up in the class
1721                                 // hierarchy.  If we're doing a DeclaredOnly search, we must abort
1722                                 // the first time this happens (this may already happen in the first
1723                                 // iteration of this loop if there are no members with the name we're
1724                                 // looking for in the current class).
1725                                 if (entry.Container != current) {
1726                                         if (declared_only || DoneSearching (global))
1727                                                 break;
1728
1729                                         current = entry.Container;
1730                                 }
1731
1732                                 // Is the member of the correct type ?
1733                                 if ((entry.EntryType & type & EntryType.MaskType) == 0)
1734                                         continue;
1735
1736                                 // Is the member static/non-static ?
1737                                 if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
1738                                         continue;
1739
1740                                 // Apply the filter to it.
1741                                 if (filter (entry.Member, criteria)) {
1742                                         if ((entry.EntryType & EntryType.MaskType) != EntryType.Method)
1743                                                 do_method_search = false;
1744                                         global.Add (entry.Member);
1745                                 }
1746                         }
1747
1748                         Timer.StopTimer (TimerType.CachedLookup);
1749
1750                         // If we have a method cache and we aren't already doing a method-only
1751                         // search, we restart in method-only search mode if the first match is
1752                         // a method.  This ensures that we return a MemberInfo with the correct
1753                         // ReflectedType for inherited methods.
1754                         if (do_method_search && (global.Count > 0)){
1755                                 using_global = false;
1756
1757                                 return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
1758                         }
1759
1760                         using_global = false;
1761                         MemberInfo [] copy = new MemberInfo [global.Count];
1762                         global.CopyTo (copy);
1763                         return copy;
1764                 }
1765
1766                 // find the nested type @name in @this.
1767                 public Type FindNestedType (string name)
1768                 {
1769                         ArrayList applicable = (ArrayList) member_hash [name];
1770                         if (applicable == null)
1771                                 return null;
1772
1773                         for (int i = applicable.Count-1; i >= 0; i--) {
1774                                 CacheEntry entry = (CacheEntry) applicable [i];
1775                                 if ((entry.EntryType & EntryType.NestedType & EntryType.MaskType) != 0)
1776                                         return (Type) entry.Member;
1777                         }
1778
1779                         return null;
1780                 }
1781
1782                 //
1783                 // This finds the method or property for us to override. invocationType is the type where
1784                 // the override is going to be declared, name is the name of the method/property, and
1785                 // paramTypes is the parameters, if any to the method or property
1786                 //
1787                 // Because the MemberCache holds members from this class and all the base classes,
1788                 // we can avoid tons of reflection stuff.
1789                 //
1790                 public MemberInfo FindMemberToOverride (Type invocationType, string name, Type [] paramTypes, bool is_property)
1791                 {
1792                         ArrayList applicable;
1793                         if (method_hash != null && !is_property)
1794                                 applicable = (ArrayList) method_hash [name];
1795                         else
1796                                 applicable = (ArrayList) member_hash [name];
1797
1798                         if (applicable == null)
1799                                 return null;
1800                         //
1801                         // Walk the chain of methods, starting from the top.
1802                         //
1803                         for (int i = applicable.Count - 1; i >= 0; i--) {
1804                                 CacheEntry entry = (CacheEntry) applicable [i];
1805
1806                                 if ((entry.EntryType & (is_property ? (EntryType.Property | EntryType.Field) : EntryType.Method)) == 0)
1807                                         continue;
1808
1809                                 PropertyInfo pi = null;
1810                                 MethodInfo mi = null;
1811                                 FieldInfo fi = null;
1812                                 Type [] cmpAttrs = null;
1813
1814                                 if (is_property) {
1815                                         if ((entry.EntryType & EntryType.Field) != 0) {
1816                                                 fi = (FieldInfo)entry.Member;
1817
1818                                                 // TODO: For this case we ignore member type
1819                                                 //fb = TypeManager.GetField (fi);
1820                                                 //cmpAttrs = new Type[] { fb.MemberType };
1821                                         } else {
1822                                                 pi = (PropertyInfo) entry.Member;
1823                                                 cmpAttrs = TypeManager.GetArgumentTypes (pi);
1824                                         }
1825                                 } else {
1826                                         mi = (MethodInfo) entry.Member;
1827                                         cmpAttrs = TypeManager.GetArgumentTypes (mi);
1828                                 }
1829
1830                                 if (fi != null) {
1831                                         // TODO: Almost duplicate !
1832                                         // Check visibility
1833                                         switch (fi.Attributes & FieldAttributes.FieldAccessMask) {
1834                                                 case FieldAttributes.Private:
1835                                                         //
1836                                                         // A private method is Ok if we are a nested subtype.
1837                                                         // The spec actually is not very clear about this, see bug 52458.
1838                                                         //
1839                                                         if (invocationType != entry.Container.Type &
1840                                                                 TypeManager.IsNestedChildOf (invocationType, entry.Container.Type))
1841                                                                 continue;
1842
1843                                                         break;
1844                                                 case FieldAttributes.FamANDAssem:
1845                                                 case FieldAttributes.Assembly:
1846                                                         //
1847                                                         // Check for assembly methods
1848                                                         //
1849                                                         if (mi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
1850                                                                 continue;
1851                                                         break;
1852                                         }
1853                                         return entry.Member;
1854                                 }
1855
1856                                 //
1857                                 // Check the arguments
1858                                 //
1859                                 if (cmpAttrs.Length != paramTypes.Length)
1860                                         continue;
1861
1862                                 for (int j = cmpAttrs.Length - 1; j >= 0; j --)
1863                                         if (paramTypes [j] != cmpAttrs [j])
1864                                                 goto next;
1865
1866                                 //
1867                                 // get one of the methods because this has the visibility info.
1868                                 //
1869                                 if (is_property) {
1870                                         mi = pi.GetGetMethod (true);
1871                                         if (mi == null)
1872                                                 mi = pi.GetSetMethod (true);
1873                                 }
1874
1875                                 //
1876                                 // Check visibility
1877                                 //
1878                                 switch (mi.Attributes & MethodAttributes.MemberAccessMask) {
1879                                 case MethodAttributes.Private:
1880                                         //
1881                                         // A private method is Ok if we are a nested subtype.
1882                                         // The spec actually is not very clear about this, see bug 52458.
1883                                         //
1884                                         if (invocationType == entry.Container.Type ||
1885                                             TypeManager.IsNestedChildOf (invocationType, entry.Container.Type))
1886                                                 return entry.Member;
1887
1888                                         break;
1889                                 case MethodAttributes.FamANDAssem:
1890                                 case MethodAttributes.Assembly:
1891                                         //
1892                                         // Check for assembly methods
1893                                         //
1894                                         if (mi.DeclaringType.Assembly == CodeGen.Assembly.Builder)
1895                                                 return entry.Member;
1896
1897                                         break;
1898                                 default:
1899                                         //
1900                                         // A protected method is ok, because we are overriding.
1901                                         // public is always ok.
1902                                         //
1903                                         return entry.Member;
1904                                 }
1905                         next:
1906                                 ;
1907                         }
1908
1909                         return null;
1910                 }
1911
1912                 /// <summary>
1913                 /// The method is looking for conflict with inherited symbols (errors CS0108, CS0109).
1914                 /// We handle two cases. The first is for types without parameters (events, field, properties).
1915                 /// The second are methods, indexers and this is why ignore_complex_types is here.
1916                 /// The latest param is temporary hack. See DoDefineMembers method for more info.
1917                 /// </summary>
1918                 public MemberInfo FindMemberWithSameName (string name, bool ignore_complex_types, MemberInfo ignore_member)
1919                 {
1920                         ArrayList applicable = null;
1921
1922                         if (method_hash != null)
1923                                 applicable = (ArrayList) method_hash [name];
1924
1925                         if (applicable != null) {
1926                                 for (int i = applicable.Count - 1; i >= 0; i--) {
1927                                         CacheEntry entry = (CacheEntry) applicable [i];
1928                                         if ((entry.EntryType & EntryType.Public) != 0)
1929                                                 return entry.Member;
1930                                 }
1931                         }
1932
1933                         if (member_hash == null)
1934                                 return null;
1935                         applicable = (ArrayList) member_hash [name];
1936
1937                         if (applicable != null) {
1938                                 for (int i = applicable.Count - 1; i >= 0; i--) {
1939                                         CacheEntry entry = (CacheEntry) applicable [i];
1940                                         if ((entry.EntryType & EntryType.Public) != 0 & entry.Member != ignore_member) {
1941                                                 if (ignore_complex_types) {
1942                                                         if ((entry.EntryType & EntryType.Method) != 0)
1943                                                                 continue;
1944
1945                                                         // Does exist easier way how to detect indexer ?
1946                                                         if ((entry.EntryType & EntryType.Property) != 0) {
1947                                                                 Type[] arg_types = TypeManager.GetArgumentTypes ((PropertyInfo)entry.Member);
1948                                                                 if (arg_types.Length > 0)
1949                                                                         continue;
1950                                                         }
1951                                                 }
1952                                                 return entry.Member;
1953                                         }
1954                                 }
1955                         }
1956                         return null;
1957                 }
1958
1959                 Hashtable locase_table;
1960
1961                 /// <summary>
1962                 /// Builds low-case table for CLS Compliance test
1963                 /// </summary>
1964                 public Hashtable GetPublicMembers ()
1965                 {
1966                         if (locase_table != null)
1967                                 return locase_table;
1968
1969                         locase_table = new Hashtable ();
1970                         foreach (DictionaryEntry entry in member_hash) {
1971                                 ArrayList members = (ArrayList)entry.Value;
1972                                 for (int ii = 0; ii < members.Count; ++ii) {
1973                                         CacheEntry member_entry = (CacheEntry) members [ii];
1974
1975                                         if ((member_entry.EntryType & EntryType.Public) == 0)
1976                                                 continue;
1977
1978                                         // TODO: Does anyone know easier way how to detect that member is internal ?
1979                                         switch (member_entry.EntryType & EntryType.MaskType) {
1980                                                 case EntryType.Constructor:
1981                                                         continue;
1982
1983                                                 case EntryType.Field:
1984                                                         if ((((FieldInfo)member_entry.Member).Attributes & (FieldAttributes.Assembly | FieldAttributes.Public)) == FieldAttributes.Assembly)
1985                                                                 continue;
1986                                                         break;
1987
1988                                                 case EntryType.Method:
1989                                                         if ((((MethodInfo)member_entry.Member).Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
1990                                                                 continue;
1991                                                         break;
1992
1993                                                 case EntryType.Property:
1994                                                         PropertyInfo pi = (PropertyInfo)member_entry.Member;
1995                                                         if (pi.GetSetMethod () == null && pi.GetGetMethod () == null)
1996                                                                 continue;
1997                                                         break;
1998
1999                                                 case EntryType.Event:
2000                                                         EventInfo ei = (EventInfo)member_entry.Member;
2001                                                         MethodInfo mi = ei.GetAddMethod ();
2002                                                         if ((mi.Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
2003                                                                 continue;
2004                                                         break;
2005                                         }
2006                                         string lcase = ((string)entry.Key).ToLower (System.Globalization.CultureInfo.InvariantCulture);
2007                                         locase_table [lcase] = member_entry.Member;
2008                                         break;
2009                                 }
2010                         }
2011                         return locase_table;
2012                 }
2013
2014                 public Hashtable Members {
2015                         get {
2016                                 return member_hash;
2017                         }
2018                 }
2019
2020                 /// <summary>
2021                 /// Cls compliance check whether methods or constructors parameters differing only in ref or out, or in array rank
2022                 /// </summary>
2023                 public void VerifyClsParameterConflict (ArrayList al, MethodCore method, MemberInfo this_builder)
2024                 {
2025                         EntryType tested_type = (method is Constructor ? EntryType.Constructor : EntryType.Method) | EntryType.Public;
2026
2027                         for (int i = 0; i < al.Count; ++i) {
2028                                 MemberCache.CacheEntry entry = (MemberCache.CacheEntry) al [i];
2029
2030                                 // skip itself
2031                                 if (entry.Member == this_builder)
2032                                         continue;
2033
2034                                 if ((entry.EntryType & tested_type) != tested_type)
2035                                         continue;
2036
2037                                 MethodBase method_to_compare = (MethodBase)entry.Member;
2038                                 if (AttributeTester.AreOverloadedMethodParamsClsCompliant (method.ParameterTypes, TypeManager.GetArgumentTypes (method_to_compare)))
2039                                         continue;
2040
2041                                 IMethodData md = TypeManager.GetMethod (method_to_compare);
2042
2043                                 // TODO: now we are ignoring CLSCompliance(false) on method from other assembly which is buggy.
2044                                 // However it is exactly what csc does.
2045                                 if (md != null && !md.IsClsCompliaceRequired (method.Parent))
2046                                         continue;
2047
2048                                 Report.SymbolRelatedToPreviousError (entry.Member);
2049                                 Report.Error (3006, method.Location, "Overloaded method '{0}' differing only in ref or out, or in array rank, is not CLS-compliant", method.GetSignatureForError ());
2050                         }
2051                 }
2052         }
2053 }