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.EmitContext);
 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.EmitContext);
 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 (HasClsCompliantAttribute && RootContext.WarningLevel >= 2) {
 360                                         if (!IsExposedFromAssembly (ds))
 361                                                 Report.Warning (3019, Location, "CLS compliance checking will not be performed on '{0}' because it is private or internal", GetSignatureForError ());
 362                                         if (!CodeGen.Assembly.IsClsCompliant)
 363                                                 Report.Warning (3021, Location, "'{0}' does not need a CLSCompliant attribute because the assembly does not have a CLSCompliant attribute", GetSignatureForError ());
 364                                 }
 365                                 return false;
 366                         }
 367
 368                         if (!CodeGen.Assembly.IsClsCompliant) {
 369                                 if (HasClsCompliantAttribute) {
 370                                         Report.Error (3014, Location, "'{0}' cannot be marked as CLS-compliant because the assembly does not have a CLSCompliant attribute", GetSignatureForError ());
 371                                 }
 372                                 return false;
 373                         }
 374
 375                         int index = Name.LastIndexOf ('.');
 376                         if (Name [index > 0 ? index + 1 : 0] == '_') {
 377                                 Report.Error (3008, Location, "Identifier '{0}' is not CLS-compliant", GetSignatureForError () );
 378                         }
 379                         return true;
 380                 }
 381
 382                 protected abstract void VerifyObsoleteAttribute ();
 383
 384                 //
 385                 // Raised (and passed an XmlElement that contains the comment)
 386                 // when GenerateDocComment is writing documentation expectedly.
 387                 //
 388                 internal virtual void OnGenerateDocComment (DeclSpace ds, XmlElement intermediateNode)
 389                 {
 390                 }
 391
 392                 //
 393                 // Returns a string that represents the signature for this
 394                 // member which should be used in XML documentation.
 395                 //
 396                 public virtual string GetDocCommentName (DeclSpace ds)
 397                 {
 398                         if (ds == null || this is DeclSpace)
 399                                 return DocCommentHeader + Name;
 400                         else
 401                                 return String.Concat (DocCommentHeader, ds.Name, ".", Name);
 402                 }
 403
 404                 //
 405                 // Generates xml doc comments (if any), and if required,
 406                 // handle warning report.
 407                 //
 408                 internal virtual void GenerateDocComment (DeclSpace ds)
 409                 {
 410                         DocUtil.GenerateDocComment (this, ds);
 411                 }
 412         }
 413
 414         /// <summary>
 415         ///   Base class for structs, classes, enumerations and interfaces.
 416         /// </summary>
 417         /// <remarks>
 418         ///   They all create new declaration spaces.  This
 419         ///   provides the common foundation for managing those name
 420         ///   spaces.
 421         /// </remarks>
 422         public abstract class DeclSpace : MemberCore, IAlias {
 423                 /// <summary>
 424                 ///   This points to the actual definition that is being
 425                 ///   created with System.Reflection.Emit
 426                 /// </summary>
 427                 public TypeBuilder TypeBuilder;
 428
 429                 //
 430                 // This is the namespace in which this typecontainer
 431                 // was declared.  We use this to resolve names.
 432                 //
 433                 public NamespaceEntry NamespaceEntry;
 434
 435                 public Hashtable Cache = new Hashtable ();
 436
 437                 public string Basename;
 438
 439                 protected Hashtable defined_names;
 440
 441                 // The emit context for toplevel objects.
 442                 protected EmitContext ec;
 443
 444                 public EmitContext EmitContext {
 445                         get { return ec; }
 446                 }
 447
 448                 static string[] attribute_targets = new string [] { "type" };
 449
 450                 public DeclSpace (NamespaceEntry ns, TypeContainer parent, MemberName name,
 451                                   Attributes attrs, Location l)
 452                         : base (parent, name, attrs, l)
 453                 {
 454                         NamespaceEntry = ns;
 455                         Basename = name.Name;
 456                         defined_names = new Hashtable ();
 457                 }
 458
 459                 /// <summary>
 460                 /// Adds the member to defined_names table. It tests for duplications and enclosing name conflicts
 461                 /// </summary>
 462                 protected bool AddToContainer (MemberCore symbol, bool is_method, string fullname, string basename)
 463                 {
 464                         if (basename == Basename && !(this is Interface)) {
 465                                 Report.SymbolRelatedToPreviousError (this);
 466                                 Report.Error (542,  symbol.Location, "'{0}': member names cannot be the same as their enclosing type", symbol.GetSignatureForError ());
 467                                 return false;
 468                         }
 469
 470                         MemberCore mc = (MemberCore)defined_names [fullname];
 471
 472                         if (is_method && (mc is MethodCore || mc is IMethodData)) {
 473                                 symbol.caching_flags |= Flags.TestMethodDuplication;
 474                                 mc.caching_flags |= Flags.TestMethodDuplication;
 475                                 return true;
 476                         }
 477
 478                         if (mc != null) {
 479                                 Report.SymbolRelatedToPreviousError (mc);
 480                                 Report.Error (102, symbol.Location, "The type '{0}' already contains a definition for '{1}'", GetSignatureForError (), basename);
 481                                 return false;
 482                         }
 483
 484                         defined_names.Add (fullname, symbol);
 485                         return true;
 486                 }
 487
 488                 public void RecordDecl ()
 489                 {
 490                         if ((NamespaceEntry != null) && (Parent == RootContext.Tree.Types))
 491                                 NamespaceEntry.DefineName (MemberName.Basename, this);
 492                 }
 493
 494                 /// <summary>
 495                 ///   Returns the MemberCore associated with a given name in the declaration
 496                 ///   space. It doesn't return method based symbols !!
 497                 /// </summary>
 498                 ///
 499                 public MemberCore GetDefinition (string name)
 500                 {
 501                         return (MemberCore)defined_names [name];
 502                 }
 503
 504                 bool in_transit = false;
 505
 506                 /// <summary>
 507                 ///   This function is used to catch recursive definitions
 508                 ///   in declarations.
 509                 /// </summary>
 510                 public bool InTransit {
 511                         get {
 512                                 return in_transit;
 513                         }
 514
 515                         set {
 516                                 in_transit = value;
 517                         }
 518                 }
 519
 520                 /// <summary>
 521                 ///   Looks up the alias for the name
 522                 /// </summary>
 523                 public IAlias LookupAlias (string name)
 524                 {
 525                         if (NamespaceEntry != null)
 526                                 return NamespaceEntry.LookupAlias (name);
 527                         else
 528                                 return null;
 529                 }
 530
 531                 //
 532                 // root_types contains all the types.  All TopLevel types
 533                 // hence have a parent that points to `root_types', that is
 534                 // why there is a non-obvious test down here.
 535                 //
 536                 public bool IsTopLevel {
 537                         get {
 538                                 if (Parent != null){
 539                                         if (Parent.Parent == null)
 540                                                 return true;
 541                                 }
 542                                 return false;
 543                         }
 544                 }
 545
 546                 public virtual void CloseType ()
 547                 {
 548                         if ((caching_flags & Flags.CloseTypeCreated) == 0){
 549                                 try {
 550                                         TypeBuilder.CreateType ();
 551                                 } catch {
 552                                         //
 553                                         // The try/catch is needed because
 554                                         // nested enumerations fail to load when they
 555                                         // are defined.
 556                                         //
 557                                         // Even if this is the right order (enumerations
 558                                         // declared after types).
 559                                         //
 560                                         // Note that this still creates the type and
 561                                         // it is possible to save it
 562                                 }
 563                                 caching_flags |= Flags.CloseTypeCreated;
 564                         }
 565                 }
 566
 567                 /// <remarks>
 568                 ///  Should be overriten by the appropriate declaration space
 569                 /// </remarks>
 570                 public abstract TypeBuilder DefineType ();
 571
 572                 /// <summary>
 573                 ///   Define all members, but don't apply any attributes or do anything which may
 574                 ///   access not-yet-defined classes.  This method also creates the MemberCache.
 575                 /// </summary>
 576                 public abstract bool DefineMembers (TypeContainer parent);
 577
 578                 //
 579                 // Whether this is an `unsafe context'
 580                 //
 581                 public bool UnsafeContext {
 582                         get {
 583                                 if ((ModFlags & Modifiers.UNSAFE) != 0)
 584                                         return true;
 585                                 if (Parent != null)
 586                                         return Parent.UnsafeContext;
 587                                 return false;
 588                         }
 589                 }
 590
 591                 public static string MakeFQN (string nsn, string name)
 592                 {
 593                         if (nsn == "")
 594                                 return name;
 595                         return String.Concat (nsn, ".", name);
 596                 }
 597
 598                 EmitContext type_resolve_ec;
 599                 EmitContext GetTypeResolveEmitContext (TypeContainer parent, Location loc)
 600                 {
 601                         type_resolve_ec = new EmitContext (parent, this, loc, null, null, ModFlags, false);
 602                         type_resolve_ec.ResolvingTypeTree = true;
 603
 604                         return type_resolve_ec;
 605                 }
 606
 607                 // <summary>
 608                 //    Looks up the type, as parsed into the expression `e'.
 609                 // </summary>
 610                 //[Obsolete ("This method is going away soon")]
 611                 public Type ResolveType (Expression e, bool silent, Location loc)
 612                 {
 613                         TypeExpr d = ResolveTypeExpr (e, silent, loc);
 614                         return d == null ? null : d.Type;
 615                 }
 616
 617                 // <summary>
 618                 //    Resolves the expression `e' for a type, and will recursively define
 619                 //    types.  This should only be used for resolving base types.
 620                 // </summary>
 621                 public TypeExpr ResolveTypeExpr (Expression e, bool silent, Location loc)
 622                 {
 623                         if (type_resolve_ec == null)
 624                                 type_resolve_ec = GetTypeResolveEmitContext (Parent, loc);
 625                         type_resolve_ec.loc = loc;
 626                         type_resolve_ec.ContainerType = TypeBuilder;
 627
 628                         return e.ResolveAsTypeTerminal (type_resolve_ec, silent);
 629                 }
 630
 631                 public bool CheckAccessLevel (Type check_type)
 632                 {
 633                         if (check_type == TypeBuilder)
 634                                 return true;
 635
 636                         TypeAttributes check_attr = check_type.Attributes & TypeAttributes.VisibilityMask;
 637
 638                         //
 639                         // Broken Microsoft runtime, return public for arrays, no matter what
 640                         // the accessibility is for their underlying class, and they return
 641                         // NonPublic visibility for pointers
 642                         //
 643                         if (check_type.IsArray || check_type.IsPointer)
 644                                 return CheckAccessLevel (TypeManager.GetElementType (check_type));
 645
 646                         if (TypeBuilder == null)
 647                                 // FIXME: TypeBuilder will be null when invoked by Class.GetNormalBases().
 648                                 //        However, this is invoked again later -- so safe to return true.
 649                                 //        May also be null when resolving top-level attributes.
 650                                 return true;
 651
 652                         switch (check_attr){
 653                         case TypeAttributes.Public:
 654                                 return true;
 655
 656                         case TypeAttributes.NotPublic:
 657                                 //
 658                                 // This test should probably use the declaringtype.
 659                                 //
 660                                 return check_type.Assembly == TypeBuilder.Assembly;
 661
 662                         case TypeAttributes.NestedPublic:
 663                                 return true;
 664
 665                         case TypeAttributes.NestedPrivate:
 666                                 return NestedAccessible (check_type);
 667
 668                         case TypeAttributes.NestedFamily:
 669                                 return FamilyAccessible (check_type);
 670
 671                         case TypeAttributes.NestedFamANDAssem:
 672                                 return (check_type.Assembly == TypeBuilder.Assembly) &&
 673                                         FamilyAccessible (check_type);
 674
 675                         case TypeAttributes.NestedFamORAssem:
 676                                 return (check_type.Assembly == TypeBuilder.Assembly) ||
 677                                         FamilyAccessible (check_type);
 678
 679                         case TypeAttributes.NestedAssembly:
 680                                 return check_type.Assembly == TypeBuilder.Assembly;
 681                         }
 682
 683                         Console.WriteLine ("HERE: " + check_attr);
 684                         return false;
 685
 686                 }
 687
 688                 protected bool NestedAccessible (Type check_type)
 689                 {
 690                         string check_type_name = check_type.FullName;
 691
 692                         // At this point, we already know check_type is a nested class.
 693                         int cio = check_type_name.LastIndexOf ('+');
 694
 695                         // Ensure that the string 'container' has a '+' in it to avoid false matches
 696                         string container = check_type_name.Substring (0, cio + 1);
 697
 698                         // Ensure that type_name ends with a '+' so that it can match 'container', if necessary
 699                         string type_name = TypeBuilder.FullName + "+";
 700
 701                         // If the current class is nested inside the container of check_type,
 702                         // we can access check_type even if it is private or protected.
 703                         return type_name.StartsWith (container);
 704                 }
 705
 706                 protected bool FamilyAccessible (Type check_type)
 707                 {
 708                         Type declaring = check_type.DeclaringType;
 709                         if (TypeBuilder == declaring ||
 710                             TypeBuilder.IsSubclassOf (declaring))
 711                                 return true;
 712
 713                         return NestedAccessible (check_type);
 714                 }
 715
 716                 // Access level of a type.
 717                 const int X = 1;
 718                 enum AccessLevel { // Each column represents `is this scope larger or equal to Blah scope'
 719                                             // Public    Assembly   Protected
 720                         Protected           = (0 << 0) | (0 << 1) | (X << 2),
 721                         Public              = (X << 0) | (X << 1) | (X << 2),
 722                         Private             = (0 << 0) | (0 << 1) | (0 << 2),
 723                         Internal            = (0 << 0) | (X << 1) | (0 << 2),
 724                         ProtectedOrInternal = (0 << 0) | (X << 1) | (X << 2),
 725                 }
 726
 727                 static AccessLevel GetAccessLevelFromModifiers (int flags)
 728                 {
 729                         if ((flags & Modifiers.INTERNAL) != 0) {
 730
 731                                 if ((flags & Modifiers.PROTECTED) != 0)
 732                                         return AccessLevel.ProtectedOrInternal;
 733                                 else
 734                                         return AccessLevel.Internal;
 735
 736                         } else if ((flags & Modifiers.PROTECTED) != 0)
 737                                 return AccessLevel.Protected;
 738
 739                         else if ((flags & Modifiers.PRIVATE) != 0)
 740                                 return AccessLevel.Private;
 741
 742                         else
 743                                 return AccessLevel.Public;
 744                 }
 745
 746                 // What is the effective access level of this?
 747                 // TODO: Cache this?
 748                 AccessLevel EffectiveAccessLevel {
 749                         get {
 750                                 AccessLevel myAccess = GetAccessLevelFromModifiers (ModFlags);
 751                                 if (!IsTopLevel && (Parent != null))
 752                                         return myAccess & Parent.EffectiveAccessLevel;
 753                                 else
 754                                         return myAccess;
 755                         }
 756                 }
 757
 758                 // Return the access level for type `t'
 759                 static AccessLevel TypeEffectiveAccessLevel (Type t)
 760                 {
 761                         if (t.IsPublic)
 762                                 return AccessLevel.Public;
 763                         if (t.IsNestedPrivate)
 764                                 return AccessLevel.Private;
 765                         if (t.IsNotPublic)
 766                                 return AccessLevel.Internal;
 767
 768                         // By now, it must be nested
 769                         AccessLevel parentLevel = TypeEffectiveAccessLevel (t.DeclaringType);
 770
 771                         if (t.IsNestedPublic)
 772                                 return parentLevel;
 773                         if (t.IsNestedAssembly)
 774                                 return parentLevel & AccessLevel.Internal;
 775                         if (t.IsNestedFamily)
 776                                 return parentLevel & AccessLevel.Protected;
 777                         if (t.IsNestedFamORAssem)
 778                                 return parentLevel & AccessLevel.ProtectedOrInternal;
 779                         if (t.IsNestedFamANDAssem)
 780                                 throw new NotImplementedException ("NestedFamANDAssem not implemented, cant make this kind of type from c# anyways");
 781
 782                         // nested private is taken care of
 783
 784                         throw new Exception ("I give up, what are you?");
 785                 }
 786
 787                 //
 788                 // This answers `is the type P, as accessible as a member M which has the
 789                 // accessability @flags which is declared as a nested member of the type T, this declspace'
 790                 //
 791                 public bool AsAccessible (Type p, int flags)
 792                 {
 793                         //
 794                         // 1) if M is private, its accessability is the same as this declspace.
 795                         // we already know that P is accessible to T before this method, so we
 796                         // may return true.
 797                         //
 798
 799                         if ((flags & Modifiers.PRIVATE) != 0)
 800                                 return true;
 801
 802                         while (p.IsArray || p.IsPointer || p.IsByRef)
 803                                 p = TypeManager.GetElementType (p);
 804
 805                         AccessLevel pAccess = TypeEffectiveAccessLevel (p);
 806                         AccessLevel mAccess = this.EffectiveAccessLevel &
 807                                 GetAccessLevelFromModifiers (flags);
 808
 809                         // for every place from which we can access M, we must
 810                         // be able to access P as well. So, we want
 811                         // For every bit in M and P, M_i -> P_1 == true
 812                         // or, ~ (M -> P) == 0 <-> ~ ( ~M | P) == 0
 813
 814                         return ~ (~ mAccess | pAccess) == 0;
 815                 }
 816
 817                 static DoubleHash dh = new DoubleHash (1000);
 818
 819                 Type DefineTypeAndParents (DeclSpace tc)
 820                 {
 821                         DeclSpace container = tc.Parent;
 822
 823                         if (container.TypeBuilder == null && container.Name != "")
 824                                 DefineTypeAndParents (container);
 825
 826                         return tc.DefineType ();
 827                 }
 828
 829                 Type LookupInterfaceOrClass (string ns, string name, out bool error)
 830                 {
 831                         DeclSpace parent;
 832                         Type t;
 833                         object r;
 834
 835                         error = false;
 836                         int p = name.LastIndexOf ('.');
 837
 838                         if (dh.Lookup (ns, name, out r))
 839                                 return (Type) r;
 840                         else {
 841                                 //
 842                                 // If the type is not a nested type, we do not need `LookupType's processing.
 843                                 // If the @name does not have a `.' in it, this cant be a nested type.
 844                                 //
 845                                 if (ns != ""){
 846                                         if (Namespace.IsNamespace (ns)) {
 847                                                 if (p != -1)
 848                                                         t = TypeManager.LookupType (ns + "." + name);
 849                                                 else
 850                                                         t = TypeManager.LookupTypeDirect (ns + "." + name);
 851                                         } else
 852                                                 t = null;
 853                                 } else if (p != -1)
 854                                         t = TypeManager.LookupType (name);
 855                                 else
 856                                         t = TypeManager.LookupTypeDirect (name);
 857                         }
 858
 859                         if (t != null) {
 860                                 dh.Insert (ns, name, t);
 861                                 return t;
 862                         }
 863
 864                         //
 865                         // In case we are fed a composite name, normalize it.
 866                         //
 867
 868                         if (p != -1){
 869                                 ns = MakeFQN (ns, name.Substring (0, p));
 870                                 name = name.Substring (p+1);
 871                         }
 872
 873                         parent = RootContext.Tree.LookupByNamespace (ns, name);
 874                         if (parent == null) {
 875                                 dh.Insert (ns, name, null);
 876                                 return null;
 877                         }
 878
 879                         t = DefineTypeAndParents (parent);
 880                         if (t == null){
 881                                 error = true;
 882                                 return null;
 883                         }
 884
 885                         dh.Insert (ns, name, t);
 886                         return t;
 887                 }
 888
 889                 public static void Error_AmbiguousTypeReference (Location loc, string name, string t1, string t2)
 890                 {
 891                         Report.Error (104, loc,
 892                                       "`{0}' is an ambiguous reference ({1} or {2})",
 893                                       name, t1, t2);
 894                 }
 895
 896                 /// <summary>
 897                 ///   GetType is used to resolve type names at the DeclSpace level.
 898                 ///   Use this to lookup class/struct bases, interface bases or
 899                 ///   delegate type references
 900                 /// </summary>
 901                 ///
 902                 /// <remarks>
 903                 ///   Contrast this to LookupType which is used inside method bodies to
 904                 ///   lookup types that have already been defined.  GetType is used
 905                 ///   during the tree resolution process and potentially define
 906                 ///   recursively the type
 907                 /// </remarks>
 908                 public Type FindType (Location loc, string name)
 909                 {
 910                         Type t;
 911                         bool error;
 912
 913                         //
 914                         // For the case the type we are looking for is nested within this one
 915                         // or is in any base class
 916                         //
 917                         DeclSpace containing_ds = this;
 918
 919                         while (containing_ds != null){
 920                                 Type container_type = containing_ds.TypeBuilder;
 921                                 Type current_type = container_type;
 922
 923                                 while (current_type != null && current_type != TypeManager.object_type) {
 924                                         string pre = current_type.FullName;
 925
 926                                         t = LookupInterfaceOrClass (pre, name, out error);
 927                                         if (error)
 928                                                 return null;
 929
 930                                         if ((t != null) && containing_ds.CheckAccessLevel (t))
 931                                                 return t;
 932
 933                                         current_type = current_type.BaseType;
 934                                 }
 935                                 containing_ds = containing_ds.Parent;
 936                         }
 937
 938                         //
 939                         // Attempt to lookup the class on our namespace and all it's implicit parents
 940                         //
 941                         for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.ImplicitParent) {
 942                                 t = LookupInterfaceOrClass (ns.FullName, name, out error);
 943                                 if (error)
 944                                         return null;
 945
 946                                 if (t != null)
 947                                         return t;
 948                         }
 949
 950                         //
 951                         // Attempt to do a direct unqualified lookup
 952                         //
 953                         t = LookupInterfaceOrClass ("", name, out error);
 954                         if (error)
 955                                 return null;
 956
 957                         if (t != null)
 958                                 return t;
 959
 960                         //
 961                         // Attempt to lookup the class on any of the `using'
 962                         // namespaces
 963                         //
 964
 965                         for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.Parent){
 966
 967                                 t = LookupInterfaceOrClass (ns.FullName, name, out error);
 968                                 if (error)
 969                                         return null;
 970
 971                                 if (t != null)
 972                                         return t;
 973
 974                                 if (name.IndexOf ('.') > 0)
 975                                         continue;
 976
 977                                 IAlias alias_value = ns.LookupAlias (name);
 978                                 if (alias_value != null) {
 979                                         t = LookupInterfaceOrClass ("", alias_value.Name, out error);
 980                                         if (error)
 981                                                 return null;
 982
 983                                         if (t != null)
 984                                                 return t;
 985                                 }
 986
 987                                 //
 988                                 // Now check the using clause list
 989                                 //
 990                                 Type match = null;
 991                                 foreach (Namespace using_ns in ns.GetUsingTable ()) {
 992                                         match = LookupInterfaceOrClass (using_ns.Name, name, out error);
 993                                         if (error)
 994                                                 return null;
 995
 996                                         if (match != null){
 997                                                 if (t != null){
 998                                                         if (CheckAccessLevel (match)) {
 999                                                                 Error_AmbiguousTypeReference (loc, name, t.FullName, match.FullName);
1000                                                                 return null;
1001                                                         }
1002                                                         continue;
1003                                                 }
1004
1005                                                 t = match;
1006                                         }
1007                                 }
1008                                 if (t != null)
1009                                         return t;
1010                         }
1011
1012                         //Report.Error (246, Location, "Can not find type `"+name+"'");
1013                         return null;
1014                 }
1015
1016                 /// <remarks>
1017                 ///   This function is broken and not what you're looking for.  It should only
1018                 ///   be used while the type is still being created since it doesn't use the cache
1019                 ///   and relies on the filter doing the member name check.
1020                 /// </remarks>
1021                 public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
1022                                                         MemberFilter filter, object criteria);
1023
1024                 /// <remarks>
1025                 ///   If we have a MemberCache, return it.  This property may return null if the
1026                 ///   class doesn't have a member cache or while it's still being created.
1027                 /// </remarks>
1028                 public abstract MemberCache MemberCache {
1029                         get;
1030                 }
1031
1032                 public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
1033                 {
1034                         try {
1035                                 TypeBuilder.SetCustomAttribute (cb);
1036                         } catch (System.ArgumentException e) {
1037                                 Report.Warning (-21, a.Location,
1038                                                 "The CharSet named property on StructLayout\n"+
1039                                                 "\tdoes not work correctly on Microsoft.NET\n"+
1040                                                 "\tYou might want to remove the CharSet declaration\n"+
1041                                                 "\tor compile using the Mono runtime instead of the\n"+
1042                                                 "\tMicrosoft .NET runtime\n"+
1043                                                 "\tThe runtime gave the error: " + e);
1044                         }
1045                 }
1046
1047                 /// <summary>
1048                 /// Goes through class hierarchy and get value of first CLSCompliantAttribute that found.
1049                 /// If no is attribute exists then return assembly CLSCompliantAttribute.
1050                 /// </summary>
1051                 public bool GetClsCompliantAttributeValue ()
1052                 {
1053                         if ((caching_flags & Flags.HasCompliantAttribute_Undetected) == 0)
1054                                 return (caching_flags & Flags.ClsCompliantAttributeTrue) != 0;
1055
1056                         caching_flags &= ~Flags.HasCompliantAttribute_Undetected;
1057
1058                         if (OptAttributes != null) {
1059                                 Attribute cls_attribute = OptAttributes.Search (TypeManager.cls_compliant_attribute_type, ec);
1060                                 if (cls_attribute != null) {
1061                                         caching_flags |= Flags.HasClsCompliantAttribute;
1062                                         if (cls_attribute.GetClsCompliantAttributeValue (ec)) {
1063                                                 caching_flags |= Flags.ClsCompliantAttributeTrue;
1064                                                 return true;
1065                                         }
1066                                         return false;
1067                                 }
1068                         }
1069
1070                         if (Parent == null) {
1071                                 if (CodeGen.Assembly.IsClsCompliant) {
1072                                         caching_flags |= Flags.ClsCompliantAttributeTrue;
1073                                         return true;
1074                                 }
1075                                 return false;
1076                         }
1077
1078                         if (Parent.GetClsCompliantAttributeValue ()) {
1079                                 caching_flags |= Flags.ClsCompliantAttributeTrue;
1080                                 return true;
1081                         }
1082                         return false;
1083                 }
1084
1085                 public override string[] ValidAttributeTargets {
1086                         get {
1087                                 return attribute_targets;
1088                         }
1089                 }
1090
1091                 bool IAlias.IsType {
1092                         get { return true; }
1093                 }
1094
1095                 string IAlias.Name {
1096                         get { return Name; }
1097                 }
1098
1099                 TypeExpr IAlias.ResolveAsType (EmitContext ec)
1100                 {
1101                         if (TypeBuilder == null)
1102                                 throw new InvalidOperationException ();
1103
1104                         return new TypeExpression (TypeBuilder, Location);
1105                 }
1106         }
1107
1108         /// <summary>
1109         ///   This is a readonly list of MemberInfo's.
1110         /// </summary>
1111         public class MemberList : IList {
1112                 public readonly IList List;
1113                 int count;
1114
1115                 /// <summary>
1116                 ///   Create a new MemberList from the given IList.
1117                 /// </summary>
1118                 public MemberList (IList list)
1119                 {
1120                         if (list != null)
1121                                 this.List = list;
1122                         else
1123                                 this.List = new ArrayList ();
1124                         count = List.Count;
1125                 }
1126
1127                 /// <summary>
1128                 ///   Concatenate the ILists `first' and `second' to a new MemberList.
1129                 /// </summary>
1130                 public MemberList (IList first, IList second)
1131                 {
1132                         ArrayList list = new ArrayList ();
1133                         list.AddRange (first);
1134                         list.AddRange (second);
1135                         count = list.Count;
1136                         List = list;
1137                 }
1138
1139                 public static readonly MemberList Empty = new MemberList (new ArrayList ());
1140
1141                 /// <summary>
1142                 ///   Cast the MemberList into a MemberInfo[] array.
1143                 /// </summary>
1144                 /// <remarks>
1145                 ///   This is an expensive operation, only use it if it's really necessary.
1146                 /// </remarks>
1147                 public static explicit operator MemberInfo [] (MemberList list)
1148                 {
1149                         Timer.StartTimer (TimerType.MiscTimer);
1150                         MemberInfo [] result = new MemberInfo [list.Count];
1151                         list.CopyTo (result, 0);
1152                         Timer.StopTimer (TimerType.MiscTimer);
1153                         return result;
1154                 }
1155
1156                 // ICollection
1157
1158                 public int Count {
1159                         get {
1160                                 return count;
1161                         }
1162                 }
1163
1164                 public bool IsSynchronized {
1165                         get {
1166                                 return List.IsSynchronized;
1167                         }
1168                 }
1169
1170                 public object SyncRoot {
1171                         get {
1172                                 return List.SyncRoot;
1173                         }
1174                 }
1175
1176                 public void CopyTo (Array array, int index)
1177                 {
1178                         List.CopyTo (array, index);
1179                 }
1180
1181                 // IEnumerable
1182
1183                 public IEnumerator GetEnumerator ()
1184                 {
1185                         return List.GetEnumerator ();
1186                 }
1187
1188                 // IList
1189
1190                 public bool IsFixedSize {
1191                         get {
1192                                 return true;
1193                         }
1194                 }
1195
1196                 public bool IsReadOnly {
1197                         get {
1198                                 return true;
1199                         }
1200                 }
1201
1202                 object IList.this [int index] {
1203                         get {
1204                                 return List [index];
1205                         }
1206
1207                         set {
1208                                 throw new NotSupportedException ();
1209                         }
1210                 }
1211
1212                 // FIXME: try to find out whether we can avoid the cast in this indexer.
1213                 public MemberInfo this [int index] {
1214                         get {
1215                                 return (MemberInfo) List [index];
1216                         }
1217                 }
1218
1219                 public int Add (object value)
1220                 {
1221                         throw new NotSupportedException ();
1222                 }
1223
1224                 public void Clear ()
1225                 {
1226                         throw new NotSupportedException ();
1227                 }
1228
1229                 public bool Contains (object value)
1230                 {
1231                         return List.Contains (value);
1232                 }
1233
1234                 public int IndexOf (object value)
1235                 {
1236                         return List.IndexOf (value);
1237                 }
1238
1239                 public void Insert (int index, object value)
1240                 {
1241                         throw new NotSupportedException ();
1242                 }
1243
1244                 public void Remove (object value)
1245                 {
1246                         throw new NotSupportedException ();
1247                 }
1248
1249                 public void RemoveAt (int index)
1250                 {
1251                         throw new NotSupportedException ();
1252                 }
1253         }
1254
1255         /// <summary>
1256         ///   This interface is used to get all members of a class when creating the
1257         ///   member cache.  It must be implemented by all DeclSpace derivatives which
1258         ///   want to support the member cache and by TypeHandle to get caching of
1259         ///   non-dynamic types.
1260         /// </summary>
1261         public interface IMemberContainer {
1262                 /// <summary>
1263                 ///   The name of the IMemberContainer.  This is only used for
1264                 ///   debugging purposes.
1265                 /// </summary>
1266                 string Name {
1267                         get;
1268                 }
1269
1270                 /// <summary>
1271                 ///   The type of this IMemberContainer.
1272                 /// </summary>
1273                 Type Type {
1274                         get;
1275                 }
1276
1277                 /// <summary>
1278                 ///   Returns the IMemberContainer of the base class or null if this
1279                 ///   is an interface or TypeManger.object_type.
1280                 ///   This is used when creating the member cache for a class to get all
1281                 ///   members from the base class.
1282                 /// </summary>
1283                 MemberCache BaseCache {
1284                         get;
1285                 }
1286
1287                 /// <summary>
1288                 ///   Whether this is an interface.
1289                 /// </summary>
1290                 bool IsInterface {
1291                         get;
1292                 }
1293
1294                 /// <summary>
1295                 ///   Returns all members of this class with the corresponding MemberTypes
1296                 ///   and BindingFlags.
1297                 /// </summary>
1298                 /// <remarks>
1299                 ///   When implementing this method, make sure not to return any inherited
1300                 ///   members and check the MemberTypes and BindingFlags properly.
1301                 ///   Unfortunately, System.Reflection is lame and doesn't provide a way to
1302                 ///   get the BindingFlags (static/non-static,public/non-public) in the
1303                 ///   MemberInfo class, but the cache needs this information.  That's why
1304                 ///   this method is called multiple times with different BindingFlags.
1305                 /// </remarks>
1306                 MemberList GetMembers (MemberTypes mt, BindingFlags bf);
1307
1308                 /// <summary>
1309                 ///   Return the container's member cache.
1310                 /// </summary>
1311                 MemberCache MemberCache {
1312                         get;
1313                 }
1314         }
1315
1316         /// <summary>
1317         ///   The MemberCache is used by dynamic and non-dynamic types to speed up
1318         ///   member lookups.  It has a member name based hash table; it maps each member
1319         ///   name to a list of CacheEntry objects.  Each CacheEntry contains a MemberInfo
1320         ///   and the BindingFlags that were initially used to get it.  The cache contains
1321         ///   all members of the current class and all inherited members.  If this cache is
1322         ///   for an interface types, it also contains all inherited members.
1323         ///
1324         ///   There are two ways to get a MemberCache:
1325         ///   * if this is a dynamic type, lookup the corresponding DeclSpace and then
1326         ///     use the DeclSpace.MemberCache property.
1327         ///   * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
1328         ///     TypeHandle instance for the type and then use TypeHandle.MemberCache.
1329         /// </summary>
1330         public class MemberCache {
1331                 public readonly IMemberContainer Container;
1332                 protected Hashtable member_hash;
1333                 protected Hashtable method_hash;
1334
1335                 /// <summary>
1336                 ///   Create a new MemberCache for the given IMemberContainer `container'.
1337                 /// </summary>
1338                 public MemberCache (IMemberContainer container)
1339                 {
1340                         this.Container = container;
1341
1342                         Timer.IncrementCounter (CounterType.MemberCache);
1343                         Timer.StartTimer (TimerType.CacheInit);
1344
1345                         // If we have a base class (we have a base class unless we're
1346                         // TypeManager.object_type), we deep-copy its MemberCache here.
1347                         if (Container.BaseCache != null)
1348                                 member_hash = SetupCache (Container.BaseCache);
1349                         else
1350                                 member_hash = new Hashtable ();
1351
1352                         // If this is neither a dynamic type nor an interface, create a special
1353                         // method cache with all declared and inherited methods.
1354                         Type type = container.Type;
1355                         if (!(type is TypeBuilder) && !type.IsInterface) {
1356                                 method_hash = new Hashtable ();
1357                                 AddMethods (type);
1358                         }
1359
1360                         // Add all members from the current class.
1361                         AddMembers (Container);
1362
1363                         Timer.StopTimer (TimerType.CacheInit);
1364                 }
1365
1366                 public MemberCache (Type[] ifaces)
1367                 {
1368                         //
1369                         // The members of this cache all belong to other caches.
1370                         // So, 'Container' will not be used.
1371                         //
1372                         this.Container = null;
1373
1374                         member_hash = new Hashtable ();
1375                         if (ifaces == null)
1376                                 return;
1377
1378                         foreach (Type itype in ifaces)
1379                                 AddCacheContents (TypeManager.LookupMemberCache (itype));
1380                 }
1381
1382                 /// <summary>
1383                 ///   Bootstrap this member cache by doing a deep-copy of our base.
1384                 /// </summary>
1385                 Hashtable SetupCache (MemberCache base_class)
1386                 {
1387                         Hashtable hash = new Hashtable ();
1388
1389                         if (base_class == null)
1390                                 return hash;
1391
1392                         IDictionaryEnumerator it = base_class.member_hash.GetEnumerator ();
1393                         while (it.MoveNext ()) {
1394                                 hash [it.Key] = ((ArrayList) it.Value).Clone ();
1395                          }
1396
1397                         return hash;
1398                 }
1399
1400                 /// <summary>
1401                 ///   Add the contents of `cache' to the member_hash.
1402                 /// </summary>
1403                 void AddCacheContents (MemberCache cache)
1404                 {
1405                         IDictionaryEnumerator it = cache.member_hash.GetEnumerator ();
1406                         while (it.MoveNext ()) {
1407                                 ArrayList list = (ArrayList) member_hash [it.Key];
1408                                 if (list == null)
1409                                         member_hash [it.Key] = list = new ArrayList ();
1410
1411                                 ArrayList entries = (ArrayList) it.Value;
1412                                 for (int i = entries.Count-1; i >= 0; i--) {
1413                                         CacheEntry entry = (CacheEntry) entries [i];
1414
1415                                         if (entry.Container != cache.Container)
1416                                                 break;
1417                                         list.Add (entry);
1418                                 }
1419                         }
1420                 }
1421
1422                 /// <summary>
1423                 ///   Add all members from class `container' to the cache.
1424                 /// </summary>
1425                 void AddMembers (IMemberContainer container)
1426                 {
1427                         // We need to call AddMembers() with a single member type at a time
1428                         // to get the member type part of CacheEntry.EntryType right.
1429                         if (!container.IsInterface) {
1430                                 AddMembers (MemberTypes.Constructor, container);
1431                                 AddMembers (MemberTypes.Field, container);
1432                         }
1433                         AddMembers (MemberTypes.Method, container);
1434                         AddMembers (MemberTypes.Property, container);
1435                         AddMembers (MemberTypes.Event, container);
1436                         // Nested types are returned by both Static and Instance searches.
1437                         AddMembers (MemberTypes.NestedType,
1438                                     BindingFlags.Static | BindingFlags.Public, container);
1439                         AddMembers (MemberTypes.NestedType,
1440                                     BindingFlags.Static | BindingFlags.NonPublic, container);
1441                 }
1442
1443                 void AddMembers (MemberTypes mt, IMemberContainer container)
1444                 {
1445                         AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
1446                         AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
1447                         AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
1448                         AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
1449                 }
1450
1451                 /// <summary>
1452                 ///   Add all members from class `container' with the requested MemberTypes and
1453                 ///   BindingFlags to the cache.  This method is called multiple times with different
1454                 ///   MemberTypes and BindingFlags.
1455                 /// </summary>
1456                 void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
1457                 {
1458                         MemberList members = container.GetMembers (mt, bf);
1459
1460                         foreach (MemberInfo member in members) {
1461                                 string name = member.Name;
1462
1463                                 // We use a name-based hash table of ArrayList's.
1464                                 ArrayList list = (ArrayList) member_hash [name];
1465                                 if (list == null) {
1466                                         list = new ArrayList ();
1467                                         member_hash.Add (name, list);
1468                                 }
1469
1470                                 // When this method is called for the current class, the list will
1471                                 // already contain all inherited members from our base classes.
1472                                 // We cannot add new members in front of the list since this'd be an
1473                                 // expensive operation, that's why the list is sorted in reverse order
1474                                 // (ie. members from the current class are coming last).
1475                                 list.Add (new CacheEntry (container, member, mt, bf));
1476                         }
1477                 }
1478
1479                 /// <summary>
1480                 ///   Add all declared and inherited methods from class `type' to the method cache.
1481                 /// </summary>
1482                 void AddMethods (Type type)
1483                 {
1484                         AddMethods (BindingFlags.Static | BindingFlags.Public |
1485                                     BindingFlags.FlattenHierarchy, type);
1486                         AddMethods (BindingFlags.Static | BindingFlags.NonPublic |
1487                                     BindingFlags.FlattenHierarchy, type);
1488                         AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
1489                         AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
1490                 }
1491
1492                 void AddMethods (BindingFlags bf, Type type)
1493                 {
1494                         MemberInfo [] members = type.GetMethods (bf);
1495
1496                         Array.Reverse (members);
1497
1498                         foreach (MethodBase member in members) {
1499                                 string name = member.Name;
1500
1501                                 // We use a name-based hash table of ArrayList's.
1502                                 ArrayList list = (ArrayList) method_hash [name];
1503                                 if (list == null) {
1504                                         list = new ArrayList ();
1505                                         method_hash.Add (name, list);
1506                                 }
1507
1508                                 // Unfortunately, the elements returned by Type.GetMethods() aren't
1509                                 // sorted so we need to do this check for every member.
1510                                 BindingFlags new_bf = bf;
1511                                 if (member.DeclaringType == type)
1512                                         new_bf |= BindingFlags.DeclaredOnly;
1513
1514                                 list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
1515                         }
1516
1517
1518                 }
1519
1520                 /// <summary>
1521                 ///   Compute and return a appropriate `EntryType' magic number for the given
1522                 ///   MemberTypes and BindingFlags.
1523                 /// </summary>
1524                 protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
1525                 {
1526                         EntryType type = EntryType.None;
1527
1528                         if ((mt & MemberTypes.Constructor) != 0)
1529                                 type |= EntryType.Constructor;
1530                         if ((mt & MemberTypes.Event) != 0)
1531                                 type |= EntryType.Event;
1532                         if ((mt & MemberTypes.Field) != 0)
1533                                 type |= EntryType.Field;
1534                         if ((mt & MemberTypes.Method) != 0)
1535                                 type |= EntryType.Method;
1536                         if ((mt & MemberTypes.Property) != 0)
1537                                 type |= EntryType.Property;
1538                         // Nested types are returned by static and instance searches.
1539                         if ((mt & MemberTypes.NestedType) != 0)
1540                                 type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;
1541
1542                         if ((bf & BindingFlags.Instance) != 0)
1543                                 type |= EntryType.Instance;
1544                         if ((bf & BindingFlags.Static) != 0)
1545                                 type |= EntryType.Static;
1546                         if ((bf & BindingFlags.Public) != 0)
1547                                 type |= EntryType.Public;
1548                         if ((bf & BindingFlags.NonPublic) != 0)
1549                                 type |= EntryType.NonPublic;
1550                         if ((bf & BindingFlags.DeclaredOnly) != 0)
1551                                 type |= EntryType.Declared;
1552
1553                         return type;
1554                 }
1555
1556                 /// <summary>
1557                 ///   The `MemberTypes' enumeration type is a [Flags] type which means that it may
1558                 ///   denote multiple member types.  Returns true if the given flags value denotes a
1559                 ///   single member types.
1560                 /// </summary>
1561                 public static bool IsSingleMemberType (MemberTypes mt)
1562                 {
1563                         switch (mt) {
1564                         case MemberTypes.Constructor:
1565                         case MemberTypes.Event:
1566                         case MemberTypes.Field:
1567                         case MemberTypes.Method:
1568                         case MemberTypes.Property:
1569                         case MemberTypes.NestedType:
1570                                 return true;
1571
1572                         default:
1573                                 return false;
1574                         }
1575                 }
1576
1577                 /// <summary>
1578                 ///   We encode the MemberTypes and BindingFlags of each members in a "magic"
1579                 ///   number to speed up the searching process.
1580                 /// </summary>
1581                 [Flags]
1582                 protected enum EntryType {
1583                         None            = 0x000,
1584
1585                         Instance        = 0x001,
1586                         Static          = 0x002,
1587                         MaskStatic      = Instance|Static,
1588
1589                         Public          = 0x004,
1590                         NonPublic       = 0x008,
1591                         MaskProtection  = Public|NonPublic,
1592
1593                         Declared        = 0x010,
1594
1595                         Constructor     = 0x020,
1596                         Event           = 0x040,
1597                         Field           = 0x080,
1598                         Method          = 0x100,
1599                         Property        = 0x200,
1600                         NestedType      = 0x400,
1601
1602                         MaskType        = Constructor|Event|Field|Method|Property|NestedType
1603                 }
1604
1605                 protected struct CacheEntry {
1606                         public readonly IMemberContainer Container;
1607                         public readonly EntryType EntryType;
1608                         public readonly MemberInfo Member;
1609
1610                         public CacheEntry (IMemberContainer container, MemberInfo member,
1611                                            MemberTypes mt, BindingFlags bf)
1612                         {
1613                                 this.Container = container;
1614                                 this.Member = member;
1615                                 this.EntryType = GetEntryType (mt, bf);
1616                         }
1617
1618                         public override string ToString ()
1619                         {
1620                                 return String.Format ("CacheEntry ({0}:{1}:{2})", Container.Name,
1621                                                       EntryType, Member);
1622                         }
1623                 }
1624
1625                 /// <summary>
1626                 ///   This is called each time we're walking up one level in the class hierarchy
1627                 ///   and checks whether we can abort the search since we've already found what
1628                 ///   we were looking for.
1629                 /// </summary>
1630                 protected bool DoneSearching (ArrayList list)
1631                 {
1632                         //
1633                         // We've found exactly one member in the current class and it's not
1634                         // a method or constructor.
1635                         //
1636                         if (list.Count == 1 && !(list [0] is MethodBase))
1637                                 return true;
1638
1639                         //
1640                         // Multiple properties: we query those just to find out the indexer
1641                         // name
1642                         //
1643                         if ((list.Count > 0) && (list [0] is PropertyInfo))
1644                                 return true;
1645
1646                         return false;
1647                 }
1648
1649                 /// <summary>
1650                 ///   Looks up members with name `name'.  If you provide an optional
1651                 ///   filter function, it'll only be called with members matching the
1652                 ///   requested member name.
1653                 ///
1654                 ///   This method will try to use the cache to do the lookup if possible.
1655                 ///
1656                 ///   Unlike other FindMembers implementations, this method will always
1657                 ///   check all inherited members - even when called on an interface type.
1658                 ///
1659                 ///   If you know that you're only looking for methods, you should use
1660                 ///   MemberTypes.Method alone since this speeds up the lookup a bit.
1661                 ///   When doing a method-only search, it'll try to use a special method
1662                 ///   cache (unless it's a dynamic type or an interface) and the returned
1663                 ///   MemberInfo's will have the correct ReflectedType for inherited methods.
1664                 ///   The lookup process will automatically restart itself in method-only
1665                 ///   search mode if it discovers that it's about to return methods.
1666                 /// </summary>
1667                 ArrayList global = new ArrayList ();
1668                 bool using_global = false;
1669
1670                 static MemberInfo [] emptyMemberInfo = new MemberInfo [0];
1671
1672                 public MemberInfo [] FindMembers (MemberTypes mt, BindingFlags bf, string name,
1673                                                   MemberFilter filter, object criteria)
1674                 {
1675                         if (using_global)
1676                                 throw new Exception ();
1677
1678                         bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
1679                         bool method_search = mt == MemberTypes.Method;
1680                         // If we have a method cache and we aren't already doing a method-only search,
1681                         // then we restart a method search if the first match is a method.
1682                         bool do_method_search = !method_search && (method_hash != null);
1683
1684                         ArrayList applicable;
1685
1686                         // If this is a method-only search, we try to use the method cache if
1687                         // possible; a lookup in the method cache will return a MemberInfo with
1688                         // the correct ReflectedType for inherited methods.
1689
1690                         if (method_search && (method_hash != null))
1691                                 applicable = (ArrayList) method_hash [name];
1692                         else
1693                                 applicable = (ArrayList) member_hash [name];
1694
1695                         if (applicable == null)
1696                                 return emptyMemberInfo;
1697
1698                         //
1699                         // 32  slots gives 53 rss/54 size
1700                         // 2/4 slots gives 55 rss
1701                         //
1702                         // Strange: from 25,000 calls, only 1,800
1703                         // are above 2.  Why does this impact it?
1704                         //
1705                         global.Clear ();
1706                         using_global = true;
1707
1708                         Timer.StartTimer (TimerType.CachedLookup);
1709
1710                         EntryType type = GetEntryType (mt, bf);
1711
1712                         IMemberContainer current = Container;
1713
1714
1715                         // `applicable' is a list of all members with the given member name `name'
1716                         // in the current class and all its base classes.  The list is sorted in
1717                         // reverse order due to the way how the cache is initialy created (to speed
1718                         // things up, we're doing a deep-copy of our base).
1719
1720                         for (int i = applicable.Count-1; i >= 0; i--) {
1721                                 CacheEntry entry = (CacheEntry) applicable [i];
1722
1723                                 // This happens each time we're walking one level up in the class
1724                                 // hierarchy.  If we're doing a DeclaredOnly search, we must abort
1725                                 // the first time this happens (this may already happen in the first
1726                                 // iteration of this loop if there are no members with the name we're
1727                                 // looking for in the current class).
1728                                 if (entry.Container != current) {
1729                                         if (declared_only || DoneSearching (global))
1730                                                 break;
1731
1732                                         current = entry.Container;
1733                                 }
1734
1735                                 // Is the member of the correct type ?
1736                                 if ((entry.EntryType & type & EntryType.MaskType) == 0)
1737                                         continue;
1738
1739                                 // Is the member static/non-static ?
1740                                 if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
1741                                         continue;
1742
1743                                 // Apply the filter to it.
1744                                 if (filter (entry.Member, criteria)) {
1745                                         if ((entry.EntryType & EntryType.MaskType) != EntryType.Method)
1746                                                 do_method_search = false;
1747                                         global.Add (entry.Member);
1748                                 }
1749                         }
1750
1751                         Timer.StopTimer (TimerType.CachedLookup);
1752
1753                         // If we have a method cache and we aren't already doing a method-only
1754                         // search, we restart in method-only search mode if the first match is
1755                         // a method.  This ensures that we return a MemberInfo with the correct
1756                         // ReflectedType for inherited methods.
1757                         if (do_method_search && (global.Count > 0)){
1758                                 using_global = false;
1759
1760                                 return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
1761                         }
1762
1763                         using_global = false;
1764                         MemberInfo [] copy = new MemberInfo [global.Count];
1765                         global.CopyTo (copy);
1766                         return copy;
1767                 }
1768
1769                 // find the nested type @name in @this.
1770                 public Type FindNestedType (string name)
1771                 {
1772                         ArrayList applicable = (ArrayList) member_hash [name];
1773                         if (applicable == null)
1774                                 return null;
1775
1776                         for (int i = applicable.Count-1; i >= 0; i--) {
1777                                 CacheEntry entry = (CacheEntry) applicable [i];
1778                                 if ((entry.EntryType & EntryType.NestedType & EntryType.MaskType) != 0)
1779                                         return (Type) entry.Member;
1780                         }
1781
1782                         return null;
1783                 }
1784
1785                 //
1786                 // This finds the method or property for us to override. invocationType is the type where
1787                 // the override is going to be declared, name is the name of the method/property, and
1788                 // paramTypes is the parameters, if any to the method or property
1789                 //
1790                 // Because the MemberCache holds members from this class and all the base classes,
1791                 // we can avoid tons of reflection stuff.
1792                 //
1793                 public MemberInfo FindMemberToOverride (Type invocationType, string name, Type [] paramTypes, bool is_property)
1794                 {
1795                         ArrayList applicable;
1796                         if (method_hash != null && !is_property)
1797                                 applicable = (ArrayList) method_hash [name];
1798                         else
1799                                 applicable = (ArrayList) member_hash [name];
1800
1801                         if (applicable == null)
1802                                 return null;
1803                         //
1804                         // Walk the chain of methods, starting from the top.
1805                         //
1806                         for (int i = applicable.Count - 1; i >= 0; i--) {
1807                                 CacheEntry entry = (CacheEntry) applicable [i];
1808
1809                                 if ((entry.EntryType & (is_property ? (EntryType.Property | EntryType.Field) : EntryType.Method)) == 0)
1810                                         continue;
1811
1812                                 PropertyInfo pi = null;
1813                                 MethodInfo mi = null;
1814                                 FieldInfo fi = null;
1815                                 Type [] cmpAttrs = null;
1816
1817                                 if (is_property) {
1818                                         if ((entry.EntryType & EntryType.Field) != 0) {
1819                                                 fi = (FieldInfo)entry.Member;
1820
1821                                                 // TODO: For this case we ignore member type
1822                                                 //fb = TypeManager.GetField (fi);
1823                                                 //cmpAttrs = new Type[] { fb.MemberType };
1824                                         } else {
1825                                                 pi = (PropertyInfo) entry.Member;
1826                                                 cmpAttrs = TypeManager.GetArgumentTypes (pi);
1827                                         }
1828                                 } else {
1829                                         mi = (MethodInfo) entry.Member;
1830                                         cmpAttrs = TypeManager.GetArgumentTypes (mi);
1831                                 }
1832
1833                                 if (fi != null) {
1834                                         // TODO: Almost duplicate !
1835                                         // Check visibility
1836                                         switch (fi.Attributes & FieldAttributes.FieldAccessMask) {
1837                                                 case FieldAttributes.Private:
1838                                                         //
1839                                                         // A private method is Ok if we are a nested subtype.
1840                                                         // The spec actually is not very clear about this, see bug 52458.
1841                                                         //
1842                                                         if (invocationType != entry.Container.Type &
1843                                                                 TypeManager.IsNestedChildOf (invocationType, entry.Container.Type))
1844                                                                 continue;
1845
1846                                                         break;
1847                                                 case FieldAttributes.FamANDAssem:
1848                                                 case FieldAttributes.Assembly:
1849                                                         //
1850                                                         // Check for assembly methods
1851                                                         //
1852                                                         if (mi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
1853                                                                 continue;
1854                                                         break;
1855                                         }
1856                                         return entry.Member;
1857                                 }
1858
1859                                 //
1860                                 // Check the arguments
1861                                 //
1862                                 if (cmpAttrs.Length != paramTypes.Length)
1863                                         continue;
1864
1865                                 for (int j = cmpAttrs.Length - 1; j >= 0; j --)
1866                                         if (paramTypes [j] != cmpAttrs [j])
1867                                                 goto next;
1868
1869                                 //
1870                                 // get one of the methods because this has the visibility info.
1871                                 //
1872                                 if (is_property) {
1873                                         mi = pi.GetGetMethod (true);
1874                                         if (mi == null)
1875                                                 mi = pi.GetSetMethod (true);
1876                                 }
1877
1878                                 //
1879                                 // Check visibility
1880                                 //
1881                                 switch (mi.Attributes & MethodAttributes.MemberAccessMask) {
1882                                 case MethodAttributes.Private:
1883                                         //
1884                                         // A private method is Ok if we are a nested subtype.
1885                                         // The spec actually is not very clear about this, see bug 52458.
1886                                         //
1887                                         if (invocationType == entry.Container.Type ||
1888                                             TypeManager.IsNestedChildOf (invocationType, entry.Container.Type))
1889                                                 return entry.Member;
1890
1891                                         break;
1892                                 case MethodAttributes.FamANDAssem:
1893                                 case MethodAttributes.Assembly:
1894                                         //
1895                                         // Check for assembly methods
1896                                         //
1897                                         if (mi.DeclaringType.Assembly == CodeGen.Assembly.Builder)
1898                                                 return entry.Member;
1899
1900                                         break;
1901                                 default:
1902                                         //
1903                                         // A protected method is ok, because we are overriding.
1904                                         // public is always ok.
1905                                         //
1906                                         return entry.Member;
1907                                 }
1908                         next:
1909                                 ;
1910                         }
1911
1912                         return null;
1913                 }
1914
1915                 /// <summary>
1916                 /// The method is looking for conflict with inherited symbols (errors CS0108, CS0109).
1917                 /// We handle two cases. The first is for types without parameters (events, field, properties).
1918                 /// The second are methods, indexers and this is why ignore_complex_types is here.
1919                 /// The latest param is temporary hack. See DoDefineMembers method for more info.
1920                 /// </summary>
1921                 public MemberInfo FindMemberWithSameName (string name, bool ignore_complex_types, MemberInfo ignore_member)
1922                 {
1923                         ArrayList applicable = null;
1924
1925                         if (method_hash != null)
1926                                 applicable = (ArrayList) method_hash [name];
1927
1928                         if (applicable != null) {
1929                                 for (int i = applicable.Count - 1; i >= 0; i--) {
1930                                         CacheEntry entry = (CacheEntry) applicable [i];
1931                                         if ((entry.EntryType & EntryType.Public) != 0)
1932                                                 return entry.Member;
1933                                 }
1934                         }
1935
1936                         if (member_hash == null)
1937                                 return null;
1938                         applicable = (ArrayList) member_hash [name];
1939
1940                         if (applicable != null) {
1941                                 for (int i = applicable.Count - 1; i >= 0; i--) {
1942                                         CacheEntry entry = (CacheEntry) applicable [i];
1943                                         if ((entry.EntryType & EntryType.Public) != 0 & entry.Member != ignore_member) {
1944                                                 if (ignore_complex_types) {
1945                                                         if ((entry.EntryType & EntryType.Method) != 0)
1946                                                                 continue;
1947
1948                                                         // Does exist easier way how to detect indexer ?
1949                                                         if ((entry.EntryType & EntryType.Property) != 0) {
1950                                                                 Type[] arg_types = TypeManager.GetArgumentTypes ((PropertyInfo)entry.Member);
1951                                                                 if (arg_types.Length > 0)
1952                                                                         continue;
1953                                                         }
1954                                                 }
1955                                                 return entry.Member;
1956                                         }
1957                                 }
1958                         }
1959                         return null;
1960                 }
1961
1962                 Hashtable locase_table;
1963
1964                 /// <summary>
1965                 /// Builds low-case table for CLS Compliance test
1966                 /// </summary>
1967                 public Hashtable GetPublicMembers ()
1968                 {
1969                         if (locase_table != null)
1970                                 return locase_table;
1971
1972                         locase_table = new Hashtable ();
1973                         foreach (DictionaryEntry entry in member_hash) {
1974                                 ArrayList members = (ArrayList)entry.Value;
1975                                 for (int ii = 0; ii < members.Count; ++ii) {
1976                                         CacheEntry member_entry = (CacheEntry) members [ii];
1977
1978                                         if ((member_entry.EntryType & EntryType.Public) == 0)
1979                                                 continue;
1980
1981                                         // TODO: Does anyone know easier way how to detect that member is internal ?
1982                                         switch (member_entry.EntryType & EntryType.MaskType) {
1983                                                 case EntryType.Constructor:
1984                                                         continue;
1985
1986                                                 case EntryType.Field:
1987                                                         if ((((FieldInfo)member_entry.Member).Attributes & (FieldAttributes.Assembly | FieldAttributes.Public)) == FieldAttributes.Assembly)
1988                                                                 continue;
1989                                                         break;
1990
1991                                                 case EntryType.Method:
1992                                                         if ((((MethodInfo)member_entry.Member).Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
1993                                                                 continue;
1994                                                         break;
1995
1996                                                 case EntryType.Property:
1997                                                         PropertyInfo pi = (PropertyInfo)member_entry.Member;
1998                                                         if (pi.GetSetMethod () == null && pi.GetGetMethod () == null)
1999                                                                 continue;
2000                                                         break;
2001
2002                                                 case EntryType.Event:
2003                                                         EventInfo ei = (EventInfo)member_entry.Member;
2004                                                         MethodInfo mi = ei.GetAddMethod ();
2005                                                         if ((mi.Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
2006                                                                 continue;
2007                                                         break;
2008                                         }
2009                                         string lcase = ((string)entry.Key).ToLower (System.Globalization.CultureInfo.InvariantCulture);
2010                                         locase_table [lcase] = member_entry.Member;
2011                                         break;
2012                                 }
2013                         }
2014                         return locase_table;
2015                 }
2016
2017                 public Hashtable Members {
2018                         get {
2019                                 return member_hash;
2020                         }
2021                 }
2022
2023                 /// <summary>
2024                 /// Cls compliance check whether methods or constructors parameters differing only in ref or out, or in array rank
2025                 /// </summary>
2026                 public void VerifyClsParameterConflict (ArrayList al, MethodCore method, MemberInfo this_builder)
2027                 {
2028                         EntryType tested_type = (method is Constructor ? EntryType.Constructor : EntryType.Method) | EntryType.Public;
2029
2030                         for (int i = 0; i < al.Count; ++i) {
2031                                 MemberCache.CacheEntry entry = (MemberCache.CacheEntry) al [i];
2032
2033                                 // skip itself
2034                                 if (entry.Member == this_builder)
2035                                         continue;
2036
2037                                 if ((entry.EntryType & tested_type) != tested_type)
2038                                         continue;
2039
2040                                 MethodBase method_to_compare = (MethodBase)entry.Member;
2041                                 if (AttributeTester.AreOverloadedMethodParamsClsCompliant (method.ParameterTypes, TypeManager.GetArgumentTypes (method_to_compare)))
2042                                         continue;
2043
2044                                 IMethodData md = TypeManager.GetMethod (method_to_compare);
2045
2046                                 // TODO: now we are ignoring CLSCompliance(false) on method from other assembly which is buggy.
2047                                 // However it is exactly what csc does.
2048                                 if (md != null && !md.IsClsCompliaceRequired (method.Parent))
2049                                         continue;
2050
2051                                 Report.SymbolRelatedToPreviousError (entry.Member);
2052                                 Report.Error (3006, method.Location, "Overloaded method '{0}' differing only in ref or out, or in array rank, is not CLS-compliant", method.GetSignatureForError ());
2053                         }
2054                 }
2055         }
2056 }