mcs/mcs/membercache.cs

   1 //
   2 // membercache.cs: A container for all member lookups
   3 //
   4 // Author: Miguel de Icaza (miguel@gnu.org)
   5 //         Marek Safar (marek.safar@gmail.com)
   6 //
   7 // Dual licensed under the terms of the MIT X11 or GNU GPL
   8 //
   9 // Copyright 2001 Ximian, Inc (http://www.ximian.com)
  10 // Copyright 2004-2010 Novell, Inc
  11 //
  12 //
  13
  14 using System;
  15 using System.Text;
  16 using System.Collections.Generic;
  17 using System.Globalization;
  18 using System.Reflection.Emit;
  19 using System.Reflection;
  20
  21 namespace Mono.CSharp {
  22
  23         [Flags]
  24         public enum MemberKind
  25         {
  26                 Constructor = 1,
  27                 Event = 1 << 1,
  28                 Field = 1 << 2,
  29                 Method = 1 << 3,
  30                 Property = 1 << 4,
  31                 Indexer = 1 << 5,
  32                 Operator = 1 << 6,
  33                 Destructor      = 1 << 7,
  34                 //Constant = 1 << 8,
  35
  36                 NestedType      = 1 << 10,
  37
  38                 Class           = 1 << 11,
  39                 Struct          = 1 << 12,
  40                 Delegate        = 1 << 13,
  41                 Enum            = 1 << 14,
  42                 Interface       = 1 << 15,
  43
  44                 MaskType = Constructor | Event | Field | Method | Property | NestedType | Indexer | Operator | Destructor,
  45                 All = MaskType
  46         }
  47
  48         [Flags]
  49         public enum BindingRestriction
  50         {
  51                 None = 0,
  52
  53                 // Member has to be accessible
  54                 AccessibleOnly = 1,
  55
  56                 // Inspect only queried type members
  57                 DeclaredOnly = 1 << 1,
  58
  59                 // Excluded static
  60                 InstanceOnly = 1 << 2,
  61
  62                 //
  63                 NoOverloadableOverrides = 1 << 3
  64         }
  65 /*
  66         public struct MemberFilter : IEquatable<MemberCore>
  67         {
  68                 public readonly string Name;
  69                 public readonly MemberKind Kind;
  70                 public readonly TypeSpec[] Parameters;
  71                 public readonly TypeSpec MemberType;
  72
  73                 public MemberFilter (IMethod m)
  74                 {
  75                         Name = m.MethodBuilder.Name;
  76                         Kind = MemberKind.Method;
  77                         Parameters = m.Parameters.Types;
  78                         MemberType = m.ReturnType;
  79                 }
  80
  81                 public MemberFilter (string name, MemberKind kind)
  82                 {
  83                         Name = name;
  84                         Kind = kind;
  85                         Parameters = null;
  86                         MemberType = null;
  87                 }
  88
  89                 public MemberFilter (string name, MemberKind kind, TypeSpec[] param, TypeSpec type)
  90                         : this (name, kind)
  91                 {
  92                         Name = name;
  93                         Kind = kind;
  94                         Parameters = param;
  95                         MemberType = type;
  96                 }
  97
  98                 public static MemberFilter Constuctor (TypeSpec[] param)
  99                 {
 100                         return new MemberFilter (System.Reflection.ConstructorInfo.ConstructorName, MemberKind.Constructor, param, null);
 101                 }
 102
 103                 public static MemberFilter Property (string name, TypeSpec type)
 104                 {
 105                         return new MemberFilter (name, MemberKind.Property, null, type);
 106                 }
 107
 108                 public static MemberFilter Field (string name, TypeSpec type)
 109                 {
 110                         return new MemberFilter (name, MemberKind.Field, null, type);
 111                 }
 112
 113                 public static MemberFilter Method (string name, TypeSpec[] param, TypeSpec type)
 114                 {
 115                         return new MemberFilter (name, MemberKind.Method, param, type);
 116                 }
 117
 118                 #region IEquatable<MemberCore> Members
 119
 120                 public bool Equals (MemberCore other)
 121                 {
 122                         // Is the member of the correct type ?
 123                         if ((other.MemberKind & Kind & MemberKind.MaskType) == 0)
 124                                 return false;
 125
 126                         if (Parameters != null) {
 127                                 if (other is IParametersMember) {
 128                                         AParametersCollection other_param = ((IParametersMember) other).Parameters;
 129                                         if (TypeSpecArrayComparer.Default.Equals (Parameters, other_param.Types))
 130                                                 return true;
 131                                 }
 132
 133                                 return false;
 134                         }
 135
 136                         if (MemberType != null) {
 137                                 //throw new NotImplementedException ();
 138                         }
 139
 140                         return true;
 141                 }
 142
 143                 #endregion
 144         }
 145 */
 146         /// <summary>
 147         ///   This is a readonly list of MemberInfo's.
 148         /// </summary>
 149         public class MemberList : IList<MemberInfo> {
 150                 public readonly IList<MemberInfo> List;
 151                 int count;
 152
 153                 /// <summary>
 154                 ///   Create a new MemberList from the given IList.
 155                 /// </summary>
 156                 public MemberList (IList<MemberInfo> list)
 157                 {
 158                         if (list != null)
 159                                 this.List = list;
 160                         else
 161                                 this.List = new List<MemberInfo> ();
 162                         count = List.Count;
 163                 }
 164
 165                 /// <summary>
 166                 ///   Concatenate the ILists `first' and `second' to a new MemberList.
 167                 /// </summary>
 168                 public MemberList (IList<MemberInfo> first, IList<MemberInfo> second)
 169                 {
 170                         var list = new List<MemberInfo> ();
 171                         list.AddRange (first);
 172                         list.AddRange (second);
 173                         count = list.Count;
 174                         List = list;
 175                 }
 176
 177                 public static readonly MemberList Empty = new MemberList (Array.AsReadOnly (new MemberInfo[0]));
 178
 179                 /// <summary>
 180                 ///   Cast the MemberList into a MemberInfo[] array.
 181                 /// </summary>
 182                 /// <remarks>
 183                 ///   This is an expensive operation, only use it if it's really necessary.
 184                 /// </remarks>
 185                 public static explicit operator MemberInfo [] (MemberList list)
 186                 {
 187                         Timer.StartTimer (TimerType.MiscTimer);
 188                         MemberInfo [] result = new MemberInfo [list.Count];
 189                         list.CopyTo (result, 0);
 190                         Timer.StopTimer (TimerType.MiscTimer);
 191                         return result;
 192                 }
 193
 194                 // ICollection
 195
 196                 public int Count {
 197                         get {
 198                                 return count;
 199                         }
 200                 }
 201
 202                 public void CopyTo (MemberInfo[] array, int index)
 203                 {
 204                         List.CopyTo (array, index);
 205                 }
 206
 207                 // IEnumerable
 208
 209                 public IEnumerator<MemberInfo> GetEnumerator ()
 210                 {
 211                         return List.GetEnumerator ();
 212                 }
 213
 214                 System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator ()
 215                 {
 216                         return List.GetEnumerator ();
 217                 }
 218
 219                 // IList
 220
 221                 public bool IsFixedSize {
 222                         get {
 223                                 return true;
 224                         }
 225                 }
 226
 227                 public bool IsReadOnly {
 228                         get {
 229                                 return true;
 230                         }
 231                 }
 232
 233                 MemberInfo IList<MemberInfo>.this [int index] {
 234                         get {
 235                                 return List [index];
 236                         }
 237
 238                         set {
 239                                 throw new NotSupportedException ();
 240                         }
 241                 }
 242
 243                 // FIXME: try to find out whether we can avoid the cast in this indexer.
 244                 public MemberInfo this [int index] {
 245                         get {
 246                                 return (MemberInfo) List [index];
 247                         }
 248                 }
 249
 250                 public void Add (MemberInfo value)
 251                 {
 252                         throw new NotSupportedException ();
 253                 }
 254
 255                 public void Clear ()
 256                 {
 257                         throw new NotSupportedException ();
 258                 }
 259
 260                 public bool Contains (MemberInfo value)
 261                 {
 262                         return List.Contains (value);
 263                 }
 264
 265                 public int IndexOf (MemberInfo value)
 266                 {
 267                         return List.IndexOf (value);
 268                 }
 269
 270                 public void Insert (int index, MemberInfo value)
 271                 {
 272                         throw new NotSupportedException ();
 273                 }
 274
 275                 public bool Remove (MemberInfo value)
 276                 {
 277                         throw new NotSupportedException ();
 278                 }
 279
 280                 public void RemoveAt (int index)
 281                 {
 282                         throw new NotSupportedException ();
 283                 }
 284         }
 285
 286         /// <summary>
 287         ///   This interface is used to get all members of a class when creating the
 288         ///   member cache.  It must be implemented by all DeclSpace derivatives which
 289         ///   want to support the member cache and by TypeHandle to get caching of
 290         ///   non-dynamic types.
 291         /// </summary>
 292         public interface IMemberContainer {
 293                 /// <summary>
 294                 ///   The name of the IMemberContainer.  This is only used for
 295                 ///   debugging purposes.
 296                 /// </summary>
 297                 string Name {
 298                         get;
 299                 }
 300
 301                 /// <summary>
 302                 ///   The type of this IMemberContainer.
 303                 /// </summary>
 304                 Type Type {
 305                         get;
 306                 }
 307
 308                 /// <summary>
 309                 ///   Returns the IMemberContainer of the base class or null if this
 310                 ///   is an interface or TypeManger.object_type.
 311                 ///   This is used when creating the member cache for a class to get all
 312                 ///   members from the base class.
 313                 /// </summary>
 314                 MemberCache BaseCache {
 315                         get;
 316                 }
 317
 318                 /// <summary>
 319                 ///   Whether this is an interface.
 320                 /// </summary>
 321                 bool IsInterface {
 322                         get;
 323                 }
 324
 325                 /// <summary>
 326                 ///   Returns all members of this class with the corresponding MemberTypes
 327                 ///   and BindingFlags.
 328                 /// </summary>
 329                 /// <remarks>
 330                 ///   When implementing this method, make sure not to return any inherited
 331                 ///   members and check the MemberTypes and BindingFlags properly.
 332                 ///   Unfortunately, System.Reflection is lame and doesn't provide a way to
 333                 ///   get the BindingFlags (static/non-static,public/non-public) in the
 334                 ///   MemberInfo class, but the cache needs this information.  That's why
 335                 ///   this method is called multiple times with different BindingFlags.
 336                 /// </remarks>
 337                 MemberList GetMembers (MemberTypes mt, BindingFlags bf);
 338         }
 339
 340         /// <summary>
 341         ///   The MemberCache is used by dynamic and non-dynamic types to speed up
 342         ///   member lookups.  It has a member name based hash table; it maps each member
 343         ///   name to a list of CacheEntry objects.  Each CacheEntry contains a MemberInfo
 344         ///   and the BindingFlags that were initially used to get it.  The cache contains
 345         ///   all members of the current class and all inherited members.  If this cache is
 346         ///   for an interface types, it also contains all inherited members.
 347         ///
 348         ///   There are two ways to get a MemberCache:
 349         ///   * if this is a dynamic type, lookup the corresponding DeclSpace and then
 350         ///     use the DeclSpace.MemberCache property.
 351         ///   * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
 352         ///     TypeHandle instance for the type and then use TypeHandle.MemberCache.
 353         /// </summary>
 354         public class MemberCache {
 355                 public readonly IMemberContainer Container;
 356                 protected Dictionary<string, List<CacheEntry>> member_hash;
 357                 protected Dictionary<string, List<CacheEntry>> method_hash;
 358
 359                 Dictionary<string, object> locase_table;
 360
 361                 static List<MethodInfo> overrides = new List<MethodInfo> ();
 362
 363                 /// <summary>
 364                 ///   Create a new MemberCache for the given IMemberContainer `container'.
 365                 /// </summary>
 366                 public MemberCache (IMemberContainer container)
 367                 {
 368                         this.Container = container;
 369
 370                         Timer.IncrementCounter (CounterType.MemberCache);
 371                         Timer.StartTimer (TimerType.CacheInit);
 372
 373                         // If we have a base class (we have a base class unless we're
 374                         // TypeManager.object_type), we deep-copy its MemberCache here.
 375                         if (Container.BaseCache != null)
 376                                 member_hash = SetupCache (Container.BaseCache);
 377                         else
 378                                 member_hash = new Dictionary<string, List<CacheEntry>> ();
 379
 380                         // If this is neither a dynamic type nor an interface, create a special
 381                         // method cache with all declared and inherited methods.
 382                         Type type = container.Type;
 383                         if (!(type is TypeBuilder) && !type.IsInterface &&
 384                             // !(type.IsGenericType && (type.GetGenericTypeDefinition () is TypeBuilder)) &&
 385                             !TypeManager.IsGenericType (type) && !TypeManager.IsGenericParameter (type) &&
 386                             (Container.BaseCache == null || Container.BaseCache.method_hash != null)) {
 387                                         method_hash = new Dictionary<string, List<CacheEntry>> ();
 388                                         AddMethods (type);
 389                         }
 390
 391                         // Add all members from the current class.
 392                         AddMembers (Container);
 393
 394                         Timer.StopTimer (TimerType.CacheInit);
 395                 }
 396
 397                 public MemberCache (Type baseType, IMemberContainer container)
 398                 {
 399                         this.Container = container;
 400                         if (baseType == null)
 401                                 this.member_hash = new Dictionary<string, List<CacheEntry>> ();
 402                         else
 403                                 this.member_hash = SetupCache (TypeManager.LookupMemberCache (baseType));
 404                 }
 405
 406                 public MemberCache (Type[] ifaces)
 407                 {
 408                         //
 409                         // The members of this cache all belong to other caches.
 410                         // So, 'Container' will not be used.
 411                         //
 412                         this.Container = null;
 413
 414                         member_hash = new Dictionary<string, List<CacheEntry>> ();
 415                         if (ifaces == null)
 416                                 return;
 417
 418                         foreach (Type itype in ifaces)
 419                                 AddCacheContents (TypeManager.LookupMemberCache (itype));
 420                 }
 421
 422                 public MemberCache (IMemberContainer container, Type base_class, Type[] ifaces)
 423                 {
 424                         this.Container = container;
 425
 426                         // If we have a base class (we have a base class unless we're
 427                         // TypeManager.object_type), we deep-copy its MemberCache here.
 428                         if (Container.BaseCache != null)
 429                                 member_hash = SetupCache (Container.BaseCache);
 430                         else
 431                                 member_hash = new Dictionary<string, List<CacheEntry>> ();
 432
 433                         if (base_class != null)
 434                                 AddCacheContents (TypeManager.LookupMemberCache (base_class));
 435                         if (ifaces != null) {
 436                                 foreach (Type itype in ifaces) {
 437                                         MemberCache cache = TypeManager.LookupMemberCache (itype);
 438                                         if (cache != null)
 439                                                 AddCacheContents (cache);
 440                                 }
 441                         }
 442                 }
 443
 444                 /// <summary>
 445                 ///   Bootstrap this member cache by doing a deep-copy of our base.
 446                 /// </summary>
 447                 static Dictionary<string, List<CacheEntry>> SetupCache (MemberCache base_class)
 448                 {
 449                         if (base_class == null)
 450                                 return new Dictionary<string, List<CacheEntry>> ();
 451
 452                         var hash = new Dictionary<string, List<CacheEntry>> (base_class.member_hash.Count);
 453                         var it = base_class.member_hash.GetEnumerator ();
 454                         while (it.MoveNext ()) {
 455                                 hash.Add (it.Current.Key, new List<CacheEntry> (it.Current.Value));
 456                         }
 457
 458                         return hash;
 459                 }
 460
 461                 //
 462                 // Converts ModFlags to BindingFlags
 463                 //
 464                 static BindingFlags GetBindingFlags (Modifiers modifiers)
 465                 {
 466                         BindingFlags bf;
 467                         if ((modifiers & Modifiers.STATIC) != 0)
 468                                 bf = BindingFlags.Static;
 469                         else
 470                                 bf = BindingFlags.Instance;
 471
 472                         if ((modifiers & Modifiers.PRIVATE) != 0)
 473                                 bf |= BindingFlags.NonPublic;
 474                         else
 475                                 bf |= BindingFlags.Public;
 476
 477                         return bf;
 478                 }
 479
 480                 /// <summary>
 481                 ///   Add the contents of `cache' to the member_hash.
 482                 /// </summary>
 483                 void AddCacheContents (MemberCache cache)
 484                 {
 485                         var it = cache.member_hash.GetEnumerator ();
 486                         while (it.MoveNext ()) {
 487                                 List<CacheEntry> list;
 488                                 if (!member_hash.TryGetValue (it.Current.Key, out list))
 489                                         member_hash [it.Current.Key] = list = new List<CacheEntry> ();
 490
 491                                 var entries = it.Current.Value;
 492                                 for (int i = entries.Count-1; i >= 0; i--) {
 493                                         var entry = entries [i];
 494
 495                                         if (entry.Container != cache.Container)
 496                                                 break;
 497                                         list.Add (entry);
 498                                 }
 499                         }
 500                 }
 501
 502                 /// <summary>
 503                 ///   Add all members from class `container' to the cache.
 504                 /// </summary>
 505                 void AddMembers (IMemberContainer container)
 506                 {
 507                         // We need to call AddMembers() with a single member type at a time
 508                         // to get the member type part of CacheEntry.EntryType right.
 509                         if (!container.IsInterface) {
 510                                 AddMembers (MemberTypes.Constructor, container);
 511                                 AddMembers (MemberTypes.Field, container);
 512                         }
 513                         AddMembers (MemberTypes.Method, container);
 514                         AddMembers (MemberTypes.Property, container);
 515                         AddMembers (MemberTypes.Event, container);
 516                         // Nested types are returned by both Static and Instance searches.
 517                         AddMembers (MemberTypes.NestedType,
 518                                     BindingFlags.Static | BindingFlags.Public, container);
 519                         AddMembers (MemberTypes.NestedType,
 520                                     BindingFlags.Static | BindingFlags.NonPublic, container);
 521                 }
 522
 523                 void AddMembers (MemberTypes mt, IMemberContainer container)
 524                 {
 525                         AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
 526                         AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
 527                         AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
 528                         AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
 529                 }
 530
 531                 public void AddMember (MemberInfo mi, MemberCore mc)
 532                 {
 533                         AddMember (mi.MemberType, GetBindingFlags (mc.ModFlags), Container, mi.Name, mi);
 534                 }
 535
 536                 public void AddGenericMember (MemberInfo mi, InterfaceMemberBase mc)
 537                 {
 538                         AddMember (mi.MemberType, GetBindingFlags (mc.ModFlags), Container,
 539                                 MemberName.MakeName (mc.GetFullName (mc.MemberName), mc.MemberName.TypeArguments), mi);
 540                 }
 541
 542                 public void AddNestedType (DeclSpace type)
 543                 {
 544                         AddMember (MemberTypes.NestedType, GetBindingFlags (type.ModFlags), (IMemberContainer) type.Parent,
 545                                 type.TypeBuilder.Name, type.TypeBuilder);
 546                 }
 547
 548                 public void AddInterface (MemberCache baseCache)
 549                 {
 550                         if (baseCache.member_hash.Count > 0)
 551                                 AddCacheContents (baseCache);
 552                 }
 553
 554                 void AddMember (MemberTypes mt, BindingFlags bf, IMemberContainer container,
 555                                 string name, MemberInfo member)
 556                 {
 557                         // We use a name-based hash table of ArrayList's.
 558                         List<CacheEntry> list;
 559                         if (!member_hash.TryGetValue (name, out list)) {
 560                                 list = new List<CacheEntry> (1);
 561                                 member_hash.Add (name, list);
 562                         }
 563
 564                         // When this method is called for the current class, the list will
 565                         // already contain all inherited members from our base classes.
 566                         // We cannot add new members in front of the list since this'd be an
 567                         // expensive operation, that's why the list is sorted in reverse order
 568                         // (ie. members from the current class are coming last).
 569                         list.Add (new CacheEntry (container, member, mt, bf));
 570                 }
 571
 572                 /// <summary>
 573                 ///   Add all members from class `container' with the requested MemberTypes and
 574                 ///   BindingFlags to the cache.  This method is called multiple times with different
 575                 ///   MemberTypes and BindingFlags.
 576                 /// </summary>
 577                 void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
 578                 {
 579                         MemberList members = container.GetMembers (mt, bf);
 580
 581                         foreach (MemberInfo member in members) {
 582                                 string name = member.Name;
 583
 584                                 AddMember (mt, bf, container, name, member);
 585
 586                                 if (member is MethodInfo) {
 587                                         string gname = TypeManager.GetMethodName ((MethodInfo) member);
 588                                         if (gname != name)
 589                                                 AddMember (mt, bf, container, gname, member);
 590                                 }
 591                         }
 592                 }
 593
 594                 /// <summary>
 595                 ///   Add all declared and inherited methods from class `type' to the method cache.
 596                 /// </summary>
 597                 void AddMethods (Type type)
 598                 {
 599                         AddMethods (BindingFlags.Static | BindingFlags.Public |
 600                                     BindingFlags.FlattenHierarchy, type);
 601                         AddMethods (BindingFlags.Static | BindingFlags.NonPublic |
 602                                     BindingFlags.FlattenHierarchy, type);
 603                         AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
 604                         AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
 605                 }
 606
 607                 void AddMethods (BindingFlags bf, Type type)
 608                 {
 609                         MethodBase [] members = type.GetMethods (bf);
 610
 611                         Array.Reverse (members);
 612
 613                         foreach (MethodBase member in members) {
 614                                 string name = member.Name;
 615
 616                                 // We use a name-based hash table of ArrayList's.
 617                                 List<CacheEntry> list;
 618                                 if (!method_hash.TryGetValue (name, out list)) {
 619                                         list = new List<CacheEntry> (1);
 620                                         method_hash.Add (name, list);
 621                                 }
 622
 623                                 MethodInfo curr = (MethodInfo) member;
 624                                 while (curr.IsVirtual && (curr.Attributes & MethodAttributes.NewSlot) == 0) {
 625                                         MethodInfo base_method = curr.GetBaseDefinition ();
 626
 627                                         if (base_method == curr)
 628                                                 // Not every virtual function needs to have a NewSlot flag.
 629                                                 break;
 630
 631                                         overrides.Add (curr);
 632                                         list.Add (new CacheEntry (null, base_method, MemberTypes.Method, bf));
 633                                         curr = base_method;
 634                                 }
 635
 636                                 if (overrides.Count > 0) {
 637                                         for (int i = 0; i < overrides.Count; ++i)
 638                                                 TypeManager.RegisterOverride ((MethodBase) overrides [i], curr);
 639                                         overrides.Clear ();
 640                                 }
 641
 642                                 // Unfortunately, the elements returned by Type.GetMethods() aren't
 643                                 // sorted so we need to do this check for every member.
 644                                 BindingFlags new_bf = bf;
 645                                 if (member.DeclaringType == type)
 646                                         new_bf |= BindingFlags.DeclaredOnly;
 647
 648                                 list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
 649                         }
 650                 }
 651
 652                 /// <summary>
 653                 ///   Compute and return a appropriate `EntryType' magic number for the given
 654                 ///   MemberTypes and BindingFlags.
 655                 /// </summary>
 656                 protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
 657                 {
 658                         EntryType type = EntryType.None;
 659
 660                         if ((mt & MemberTypes.Constructor) != 0)
 661                                 type |= EntryType.Constructor;
 662                         if ((mt & MemberTypes.Event) != 0)
 663                                 type |= EntryType.Event;
 664                         if ((mt & MemberTypes.Field) != 0)
 665                                 type |= EntryType.Field;
 666                         if ((mt & MemberTypes.Method) != 0)
 667                                 type |= EntryType.Method;
 668                         if ((mt & MemberTypes.Property) != 0)
 669                                 type |= EntryType.Property;
 670                         // Nested types are returned by static and instance searches.
 671                         if ((mt & MemberTypes.NestedType) != 0)
 672                                 type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;
 673
 674                         if ((bf & BindingFlags.Instance) != 0)
 675                                 type |= EntryType.Instance;
 676                         if ((bf & BindingFlags.Static) != 0)
 677                                 type |= EntryType.Static;
 678                         if ((bf & BindingFlags.Public) != 0)
 679                                 type |= EntryType.Public;
 680                         if ((bf & BindingFlags.NonPublic) != 0)
 681                                 type |= EntryType.NonPublic;
 682                         if ((bf & BindingFlags.DeclaredOnly) != 0)
 683                                 type |= EntryType.Declared;
 684
 685                         return type;
 686                 }
 687
 688                 /// <summary>
 689                 ///   The `MemberTypes' enumeration type is a [Flags] type which means that it may
 690                 ///   denote multiple member types.  Returns true if the given flags value denotes a
 691                 ///   single member types.
 692                 /// </summary>
 693                 public static bool IsSingleMemberType (MemberTypes mt)
 694                 {
 695                         switch (mt) {
 696                         case MemberTypes.Constructor:
 697                         case MemberTypes.Event:
 698                         case MemberTypes.Field:
 699                         case MemberTypes.Method:
 700                         case MemberTypes.Property:
 701                         case MemberTypes.NestedType:
 702                                 return true;
 703
 704                         default:
 705                                 return false;
 706                         }
 707                 }
 708
 709                 /// <summary>
 710                 ///   We encode the MemberTypes and BindingFlags of each members in a "magic"
 711                 ///   number to speed up the searching process.
 712                 /// </summary>
 713                 [Flags]
 714                 public enum EntryType {
 715                         None            = 0x000,
 716
 717                         Instance        = 0x001,
 718                         Static          = 0x002,
 719                         MaskStatic      = Instance|Static,
 720
 721                         Public          = 0x004,
 722                         NonPublic       = 0x008,
 723                         MaskProtection  = Public|NonPublic,
 724
 725                         Declared        = 0x010,
 726
 727                         Constructor     = 0x020,
 728                         Event           = 0x040,
 729                         Field           = 0x080,
 730                         Method          = 0x100,
 731                         Property        = 0x200,
 732                         NestedType      = 0x400,
 733
 734                         NotExtensionMethod      = 0x800,
 735
 736                         MaskType        = Constructor|Event|Field|Method|Property|NestedType
 737                 }
 738
 739                 public class CacheEntry {
 740                         public readonly IMemberContainer Container;
 741                         public EntryType EntryType;
 742                         public readonly MemberInfo Member;
 743
 744                         public CacheEntry (IMemberContainer container, MemberInfo member,
 745                                            MemberTypes mt, BindingFlags bf)
 746                         {
 747                                 this.Container = container;
 748                                 this.Member = member;
 749                                 this.EntryType = GetEntryType (mt, bf);
 750                         }
 751
 752                         public override string ToString ()
 753                         {
 754                                 return String.Format ("CacheEntry ({0}:{1}:{2})", Container.Name,
 755                                                       EntryType, Member);
 756                         }
 757                 }
 758
 759                 /// <summary>
 760                 ///   This is called each time we're walking up one level in the class hierarchy
 761                 ///   and checks whether we can abort the search since we've already found what
 762                 ///   we were looking for.
 763                 /// </summary>
 764                 protected bool DoneSearching (IList<MemberInfo> list)
 765                 {
 766                         //
 767                         // We've found exactly one member in the current class and it's not
 768                         // a method or constructor.
 769                         //
 770                         if (list.Count == 1 && !(list [0] is MethodBase))
 771                                 return true;
 772
 773                         //
 774                         // Multiple properties: we query those just to find out the indexer
 775                         // name
 776                         //
 777                         if ((list.Count > 0) && (list [0] is PropertyInfo))
 778                                 return true;
 779
 780                         return false;
 781                 }
 782
 783                 /// <summary>
 784                 ///   Looks up members with name `name'.  If you provide an optional
 785                 ///   filter function, it'll only be called with members matching the
 786                 ///   requested member name.
 787                 ///
 788                 ///   This method will try to use the cache to do the lookup if possible.
 789                 ///
 790                 ///   Unlike other FindMembers implementations, this method will always
 791                 ///   check all inherited members - even when called on an interface type.
 792                 ///
 793                 ///   If you know that you're only looking for methods, you should use
 794                 ///   MemberTypes.Method alone since this speeds up the lookup a bit.
 795                 ///   When doing a method-only search, it'll try to use a special method
 796                 ///   cache (unless it's a dynamic type or an interface) and the returned
 797                 ///   MemberInfo's will have the correct ReflectedType for inherited methods.
 798                 ///   The lookup process will automatically restart itself in method-only
 799                 ///   search mode if it discovers that it's about to return methods.
 800                 /// </summary>
 801                 List<MemberInfo> global = new List<MemberInfo> ();
 802                 bool using_global;
 803
 804                 static MemberInfo [] emptyMemberInfo = new MemberInfo [0];
 805
 806                 public MemberInfo [] FindMembers (MemberTypes mt, BindingFlags bf, string name,
 807                                                   MemberFilter filter, object criteria)
 808                 {
 809                         if (using_global)
 810                                 throw new Exception ();
 811
 812                         bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
 813                         bool method_search = mt == MemberTypes.Method;
 814                         // If we have a method cache and we aren't already doing a method-only search,
 815                         // then we restart a method search if the first match is a method.
 816                         bool do_method_search = !method_search && (method_hash != null);
 817
 818                         List<CacheEntry> applicable;
 819
 820                         // If this is a method-only search, we try to use the method cache if
 821                         // possible; a lookup in the method cache will return a MemberInfo with
 822                         // the correct ReflectedType for inherited methods.
 823
 824                         if (method_search && (method_hash != null))
 825                                 method_hash.TryGetValue (name, out applicable);
 826                         else
 827                                 member_hash.TryGetValue (name, out applicable);
 828
 829                         if (applicable == null)
 830                                 return emptyMemberInfo;
 831
 832                         //
 833                         // 32  slots gives 53 rss/54 size
 834                         // 2/4 slots gives 55 rss
 835                         //
 836                         // Strange: from 25,000 calls, only 1,800
 837                         // are above 2.  Why does this impact it?
 838                         //
 839                         global.Clear ();
 840                         using_global = true;
 841
 842                         Timer.StartTimer (TimerType.CachedLookup);
 843
 844                         EntryType type = GetEntryType (mt, bf);
 845
 846                         IMemberContainer current = Container;
 847
 848                         bool do_interface_search = current.IsInterface;
 849
 850                         // `applicable' is a list of all members with the given member name `name'
 851                         // in the current class and all its base classes.  The list is sorted in
 852                         // reverse order due to the way how the cache is initialy created (to speed
 853                         // things up, we're doing a deep-copy of our base).
 854
 855                         for (int i = applicable.Count-1; i >= 0; i--) {
 856                                 CacheEntry entry = (CacheEntry) applicable [i];
 857
 858                                 // This happens each time we're walking one level up in the class
 859                                 // hierarchy.  If we're doing a DeclaredOnly search, we must abort
 860                                 // the first time this happens (this may already happen in the first
 861                                 // iteration of this loop if there are no members with the name we're
 862                                 // looking for in the current class).
 863                                 if (entry.Container != current) {
 864                                         if (declared_only)
 865                                                 break;
 866
 867                                         if (!do_interface_search && DoneSearching (global))
 868                                                 break;
 869
 870                                         current = entry.Container;
 871                                 }
 872
 873                                 // Is the member of the correct type ?
 874                                 if ((entry.EntryType & type & EntryType.MaskType) == 0)
 875                                         continue;
 876
 877                                 // Is the member static/non-static ?
 878                                 if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
 879                                         continue;
 880
 881                                 // Apply the filter to it.
 882                                 if (filter (entry.Member, criteria)) {
 883                                         if ((entry.EntryType & EntryType.MaskType) != EntryType.Method) {
 884                                                 do_method_search = false;
 885                                         }
 886
 887                                         // Because interfaces support multiple inheritance we have to be sure that
 888                                         // base member is from same interface, so only top level member will be returned
 889                                         if (do_interface_search && global.Count > 0) {
 890                                                 bool member_already_exists = false;
 891
 892                                                 foreach (MemberInfo mi in global) {
 893                                                         if (mi is MethodBase)
 894                                                                 continue;
 895
 896                                                         if (IsInterfaceBaseInterface (TypeManager.GetInterfaces (mi.DeclaringType), entry.Member.DeclaringType)) {
 897                                                                 member_already_exists = true;
 898                                                                 break;
 899                                                         }
 900                                                 }
 901                                                 if (member_already_exists)
 902                                                         continue;
 903                                         }
 904
 905                                         global.Add (entry.Member);
 906                                 }
 907                         }
 908
 909                         Timer.StopTimer (TimerType.CachedLookup);
 910
 911                         // If we have a method cache and we aren't already doing a method-only
 912                         // search, we restart in method-only search mode if the first match is
 913                         // a method.  This ensures that we return a MemberInfo with the correct
 914                         // ReflectedType for inherited methods.
 915                         if (do_method_search && (global.Count > 0)){
 916                                 using_global = false;
 917
 918                                 return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
 919                         }
 920
 921                         using_global = false;
 922                         MemberInfo [] copy = new MemberInfo [global.Count];
 923                         global.CopyTo (copy);
 924                         return copy;
 925                 }
 926
 927                 /// <summary>
 928                 /// Returns true if iterface exists in any base interfaces (ifaces)
 929                 /// </summary>
 930                 static bool IsInterfaceBaseInterface (Type[] ifaces, Type ifaceToFind)
 931                 {
 932                         foreach (Type iface in ifaces) {
 933                                 if (iface == ifaceToFind)
 934                                         return true;
 935
 936                                 Type[] base_ifaces = TypeManager.GetInterfaces (iface);
 937                                 if (base_ifaces.Length > 0 && IsInterfaceBaseInterface (base_ifaces, ifaceToFind))
 938                                         return true;
 939                         }
 940                         return false;
 941                 }
 942
 943                 // find the nested type @name in @this.
 944                 public Type FindNestedType (string name)
 945                 {
 946                         List<CacheEntry> applicable;
 947                         if (!member_hash.TryGetValue (name, out applicable))
 948                                 return null;
 949
 950                         for (int i = applicable.Count-1; i >= 0; i--) {
 951                                 CacheEntry entry = applicable [i];
 952                                 if ((entry.EntryType & EntryType.NestedType & EntryType.MaskType) != 0)
 953                                         return (Type) entry.Member;
 954                         }
 955
 956                         return null;
 957                 }
 958
 959                 public MemberInfo FindBaseEvent (Type invocation_type, string name)
 960                 {
 961                         List<CacheEntry> applicable;
 962                         if (!member_hash.TryGetValue (name, out applicable))
 963                                 return null;
 964
 965                         //
 966                         // Walk the chain of events, starting from the top.
 967                         //
 968                         for (int i = applicable.Count - 1; i >= 0; i--)
 969                         {
 970                                 CacheEntry entry = applicable [i];
 971                                 if ((entry.EntryType & EntryType.Event) == 0)
 972                                         continue;
 973
 974                                 EventInfo ei = (EventInfo)entry.Member;
 975                                 return ei.GetAddMethod (true);
 976                         }
 977
 978                         return null;
 979                 }
 980
 981                 //
 982                 // Looks for extension methods with defined name and extension type
 983                 //
 984                 public List<MethodSpec> FindExtensionMethods (Assembly thisAssembly, Type extensionType, string name, bool publicOnly)
 985                 {
 986                         List<CacheEntry> entries;
 987                         if (method_hash != null)
 988                                 method_hash.TryGetValue (name, out entries);
 989                         else {
 990                                 member_hash.TryGetValue (name, out entries);
 991                         }
 992
 993                         if (entries == null)
 994                                 return null;
 995
 996                         EntryType entry_type = EntryType.Static | EntryType.Method | EntryType.NotExtensionMethod;
 997                         EntryType found_entry_type = entry_type & ~EntryType.NotExtensionMethod;
 998
 999                         List<MethodSpec> candidates = null;
1000                         foreach (CacheEntry entry in entries) {
1001                                 if ((entry.EntryType & entry_type) == found_entry_type) {
1002                                         MethodBase mb = (MethodBase)entry.Member;
1003
1004                                         // Simple accessibility check
1005                                         if ((entry.EntryType & EntryType.Public) == 0 && publicOnly) {
1006                                                 MethodAttributes ma = mb.Attributes & MethodAttributes.MemberAccessMask;
1007                                                 if (ma != MethodAttributes.Assembly && ma != MethodAttributes.FamORAssem)
1008                                                         continue;
1009
1010                                                 if (!TypeManager.IsThisOrFriendAssembly (thisAssembly, mb.DeclaringType.Assembly))
1011                                                         continue;
1012                                         }
1013
1014                                         IMethodData md = TypeManager.GetMethod (mb);
1015                                         AParametersCollection pd = md == null ?
1016                                                 TypeManager.GetParameterData (mb) : md.ParameterInfo;
1017
1018                                         Type ex_type = pd.ExtensionMethodType;
1019                                         if (ex_type == null) {
1020                                                 entry.EntryType |= EntryType.NotExtensionMethod;
1021                                                 continue;
1022                                         }
1023
1024                                         if (candidates == null)
1025                                                 candidates = new List<MethodSpec> (2);
1026                                         candidates.Add (Import.CreateMethod (mb));
1027                                 }
1028                         }
1029
1030                         return candidates;
1031                 }
1032
1033                 //
1034                 // This finds the method or property for us to override. invocation_type is the type where
1035                 // the override is going to be declared, name is the name of the method/property, and
1036                 // param_types is the parameters, if any to the method or property
1037                 //
1038                 // Because the MemberCache holds members from this class and all the base classes,
1039                 // we can avoid tons of reflection stuff.
1040                 //
1041                 public MemberInfo FindMemberToOverride (Type invocation_type, string name, AParametersCollection parameters, GenericMethod generic_method, bool is_property)
1042                 {
1043                         List<CacheEntry> applicable;
1044                         if (method_hash != null && !is_property)
1045                                 method_hash.TryGetValue (name, out applicable);
1046                         else
1047                                 member_hash.TryGetValue (name, out applicable);
1048
1049                         if (applicable == null)
1050                                 return null;
1051                         //
1052                         // Walk the chain of methods, starting from the top.
1053                         //
1054                         for (int i = applicable.Count - 1; i >= 0; i--) {
1055                                 CacheEntry entry = applicable [i];
1056
1057                                 if ((entry.EntryType & (is_property ? (EntryType.Property | EntryType.Field) : EntryType.Method)) == 0)
1058                                         continue;
1059
1060                                 PropertyInfo pi = null;
1061                                 MethodInfo mi = null;
1062                                 FieldInfo fi = null;
1063                                 AParametersCollection cmp_attrs;
1064
1065                                 if (is_property) {
1066                                         if ((entry.EntryType & EntryType.Field) != 0) {
1067                                                 fi = (FieldInfo)entry.Member;
1068                                                 cmp_attrs = ParametersCompiled.EmptyReadOnlyParameters;
1069                                         } else {
1070                                                 pi = (PropertyInfo) entry.Member;
1071                                                 cmp_attrs = TypeManager.GetParameterData (pi);
1072                                         }
1073                                 } else {
1074                                         mi = (MethodInfo) entry.Member;
1075                                         cmp_attrs = TypeManager.GetParameterData (mi);
1076                                 }
1077
1078                                 if (fi != null) {
1079                                         // TODO: Almost duplicate !
1080                                         // Check visibility
1081                                         switch (fi.Attributes & FieldAttributes.FieldAccessMask) {
1082                                         case FieldAttributes.PrivateScope:
1083                                                 continue;
1084                                         case FieldAttributes.Private:
1085                                                 //
1086                                                 // A private method is Ok if we are a nested subtype.
1087                                                 // The spec actually is not very clear about this, see bug 52458.
1088                                                 //
1089                                                 if (!invocation_type.Equals (entry.Container.Type) &&
1090                                                     !TypeManager.IsNestedChildOf (invocation_type, entry.Container.Type))
1091                                                         continue;
1092                                                 break;
1093                                         case FieldAttributes.FamANDAssem:
1094                                         case FieldAttributes.Assembly:
1095                                                 //
1096                                                 // Check for assembly methods
1097                                                 //
1098                                                 if (fi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
1099                                                         continue;
1100                                                 break;
1101                                         }
1102                                         return entry.Member;
1103                                 }
1104
1105                                 //
1106                                 // Check the arguments
1107                                 //
1108                                 if (cmp_attrs.Count != parameters.Count)
1109                                         continue;
1110
1111                                 int j;
1112                                 for (j = 0; j < cmp_attrs.Count; ++j) {
1113                                         //
1114                                         // LAMESPEC: No idea why `params' modifier is ignored
1115                                         //
1116                                         if ((parameters.FixedParameters [j].ModFlags & ~Parameter.Modifier.PARAMS) !=
1117                                                 (cmp_attrs.FixedParameters [j].ModFlags & ~Parameter.Modifier.PARAMS))
1118                                                 break;
1119
1120                                         if (!TypeManager.IsEqual (parameters.Types [j], cmp_attrs.Types [j]))
1121                                                 break;
1122                                 }
1123
1124                                 if (j < cmp_attrs.Count)
1125                                         continue;
1126
1127                                 //
1128                                 // check generic arguments for methods
1129                                 //
1130                                 if (mi != null) {
1131                                         Type [] cmpGenArgs = TypeManager.GetGenericArguments (mi);
1132                                         if (generic_method == null && cmpGenArgs != null && cmpGenArgs.Length != 0)
1133                                                 continue;
1134                                         if (generic_method != null && cmpGenArgs != null && cmpGenArgs.Length != generic_method.TypeParameters.Length)
1135                                                 continue;
1136                                 }
1137
1138                                 //
1139                                 // get one of the methods because this has the visibility info.
1140                                 //
1141                                 if (is_property) {
1142                                         mi = pi.GetGetMethod (true);
1143                                         if (mi == null)
1144                                                 mi = pi.GetSetMethod (true);
1145                                 }
1146
1147                                 //
1148                                 // Check visibility
1149                                 //
1150                                 switch (mi.Attributes & MethodAttributes.MemberAccessMask) {
1151                                 case MethodAttributes.PrivateScope:
1152                                         continue;
1153                                 case MethodAttributes.Private:
1154                                         //
1155                                         // A private method is Ok if we are a nested subtype.
1156                                         // The spec actually is not very clear about this, see bug 52458.
1157                                         //
1158                                         if (!invocation_type.Equals (entry.Container.Type) &&
1159                                             !TypeManager.IsNestedChildOf (invocation_type, entry.Container.Type))
1160                                                 continue;
1161                                         break;
1162                                 case MethodAttributes.FamANDAssem:
1163                                 case MethodAttributes.Assembly:
1164                                         //
1165                                         // Check for assembly methods
1166                                         //
1167                                         if (!TypeManager.IsThisOrFriendAssembly (invocation_type.Assembly, mi.DeclaringType.Assembly))
1168                                                 continue;
1169                                         break;
1170                                 }
1171                                 return entry.Member;
1172                         }
1173
1174                         return null;
1175                 }
1176
1177                 /// <summary>
1178                 /// The method is looking for conflict with inherited symbols (errors CS0108, CS0109).
1179                 /// We handle two cases. The first is for types without parameters (events, field, properties).
1180                 /// The second are methods, indexers and this is why ignore_complex_types is here.
1181                 /// The latest param is temporary hack. See DoDefineMembers method for more info.
1182                 /// </summary>
1183                 public MemberInfo FindMemberWithSameName (string name, bool ignore_complex_types, MemberInfo ignore_member)
1184                 {
1185                         List<CacheEntry> applicable = null;
1186
1187                         if (method_hash != null)
1188                                 method_hash.TryGetValue (name, out applicable);
1189
1190                         if (applicable != null) {
1191                                 for (int i = applicable.Count - 1; i >= 0; i--) {
1192                                         CacheEntry entry = (CacheEntry) applicable [i];
1193                                         if ((entry.EntryType & EntryType.Public) != 0)
1194                                                 return entry.Member;
1195                                 }
1196                         }
1197
1198                         if (member_hash == null)
1199                                 return null;
1200
1201                         if (member_hash.TryGetValue (name, out applicable)) {
1202                                 for (int i = applicable.Count - 1; i >= 0; i--) {
1203                                         CacheEntry entry = (CacheEntry) applicable [i];
1204                                         if ((entry.EntryType & EntryType.Public) != 0 & entry.Member != ignore_member) {
1205                                                 if (ignore_complex_types) {
1206                                                         if ((entry.EntryType & EntryType.Method) != 0)
1207                                                                 continue;
1208
1209                                                         // Does exist easier way how to detect indexer ?
1210                                                         if ((entry.EntryType & EntryType.Property) != 0) {
1211                                                                 AParametersCollection arg_types = TypeManager.GetParameterData ((PropertyInfo)entry.Member);
1212                                                                 if (arg_types.Count > 0)
1213                                                                         continue;
1214                                                         }
1215                                                 }
1216                                                 return entry.Member;
1217                                         }
1218                                 }
1219                         }
1220                         return null;
1221                 }
1222
1223
1224                 /// <summary>
1225                 /// Builds low-case table for CLS Compliance test
1226                 /// </summary>
1227                 public Dictionary<string, object> GetPublicMembers ()
1228                 {
1229                         if (locase_table != null)
1230                                 return locase_table;
1231
1232                         locase_table = new Dictionary<string, object> ();
1233                         foreach (var entry in member_hash) {
1234                                 var members = entry.Value;
1235                                 for (int ii = 0; ii < members.Count; ++ii) {
1236                                         CacheEntry member_entry = members [ii];
1237
1238                                         if ((member_entry.EntryType & EntryType.Public) == 0)
1239                                                 continue;
1240
1241                                         // TODO: Does anyone know easier way how to detect that member is internal ?
1242                                         switch (member_entry.EntryType & EntryType.MaskType) {
1243                                         case EntryType.Constructor:
1244                                                 continue;
1245
1246                                         case EntryType.Field:
1247                                                 if ((((FieldInfo)member_entry.Member).Attributes & (FieldAttributes.Assembly | FieldAttributes.Public)) == FieldAttributes.Assembly)
1248                                                         continue;
1249                                                 break;
1250
1251                                         case EntryType.Method:
1252                                                 if ((((MethodInfo)member_entry.Member).Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
1253                                                         continue;
1254                                                 break;
1255
1256                                         case EntryType.Property:
1257                                                 PropertyInfo pi = (PropertyInfo)member_entry.Member;
1258                                                 if (pi.GetSetMethod () == null && pi.GetGetMethod () == null)
1259                                                         continue;
1260                                                 break;
1261
1262                                         case EntryType.Event:
1263                                                 EventInfo ei = (EventInfo)member_entry.Member;
1264                                                 MethodInfo mi = ei.GetAddMethod ();
1265                                                 if ((mi.Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
1266                                                         continue;
1267                                                 break;
1268                                         }
1269                                         string lcase = ((string)entry.Key).ToLower (System.Globalization.CultureInfo.InvariantCulture);
1270                                         locase_table [lcase] = member_entry.Member;
1271                                         break;
1272                                 }
1273                         }
1274                         return locase_table;
1275                 }
1276
1277                 public IDictionary<string, List<CacheEntry>> Members {
1278                         get {
1279                                 return member_hash;
1280                         }
1281                 }
1282
1283                 /// <summary>
1284                 /// Cls compliance check whether methods or constructors parameters differing only in ref or out, or in array rank
1285                 /// </summary>
1286                 ///
1287                 // TODO: refactor as method is always 'this'
1288                 public static void VerifyClsParameterConflict (IList<CacheEntry> al, MethodCore method, MemberInfo this_builder, Report Report)
1289                 {
1290                         EntryType tested_type = (method is Constructor ? EntryType.Constructor : EntryType.Method) | EntryType.Public;
1291
1292                         for (int i = 0; i < al.Count; ++i) {
1293                                 var entry = al [i];
1294
1295                                 // skip itself
1296                                 if (entry.Member == this_builder)
1297                                         continue;
1298
1299                                 if ((entry.EntryType & tested_type) != tested_type)
1300                                         continue;
1301
1302                                 MethodBase method_to_compare = (MethodBase)entry.Member;
1303                                 AttributeTester.Result result = AttributeTester.AreOverloadedMethodParamsClsCompliant (
1304                                         method.Parameters, TypeManager.GetParameterData (method_to_compare));
1305
1306                                 if (result == AttributeTester.Result.Ok)
1307                                         continue;
1308
1309                                 IMethodData md = TypeManager.GetMethod (method_to_compare);
1310
1311                                 // TODO: now we are ignoring CLSCompliance(false) on method from other assembly which is buggy.
1312                                 // However it is exactly what csc does.
1313                                 if (md != null && !md.IsClsComplianceRequired ())
1314                                         continue;
1315
1316                                 Report.SymbolRelatedToPreviousError (entry.Member);
1317                                 switch (result) {
1318                                 case AttributeTester.Result.RefOutArrayError:
1319                                         Report.Warning (3006, 1, method.Location,
1320                                                         "Overloaded method `{0}' differing only in ref or out, or in array rank, is not CLS-compliant",
1321                                                         method.GetSignatureForError ());
1322                                         continue;
1323                                 case AttributeTester.Result.ArrayArrayError:
1324                                         Report.Warning (3007, 1, method.Location,
1325                                                         "Overloaded method `{0}' differing only by unnamed array types is not CLS-compliant",
1326                                                         method.GetSignatureForError ());
1327                                         continue;
1328                                 }
1329
1330                                 throw new NotImplementedException (result.ToString ());
1331                         }
1332                 }
1333
1334                 public bool CheckExistingMembersOverloads (MemberCore member, string name, ParametersCompiled parameters, Report Report)
1335                 {
1336                         List<CacheEntry> entries;
1337                         if (!member_hash.TryGetValue (name, out entries))
1338                                 return true;
1339
1340                         int method_param_count = parameters.Count;
1341                         for (int i = entries.Count - 1; i >= 0; --i) {
1342                                 CacheEntry ce = (CacheEntry) entries [i];
1343
1344                                 if (ce.Container != member.Parent.PartialContainer)
1345                                         return true;
1346
1347                                 Type [] p_types;
1348                                 AParametersCollection pd;
1349                                 if ((ce.EntryType & EntryType.Property) != 0) {
1350                                         pd = TypeManager.GetParameterData ((PropertyInfo) ce.Member);
1351                                         p_types = pd.Types;
1352                                 } else {
1353                                         MethodBase mb = (MethodBase) ce.Member;
1354
1355                                         // TODO: This is more like a hack, because we are adding generic methods
1356                                         // twice with and without arity name
1357                                         if (TypeManager.IsGenericMethod (mb) && !member.MemberName.IsGeneric)
1358                                                 continue;
1359
1360                                         pd = TypeManager.GetParameterData (mb);
1361                                         p_types = pd.Types;
1362                                 }
1363
1364                                 if (p_types.Length != method_param_count)
1365                                         continue;
1366
1367                                 if (method_param_count > 0) {
1368                                         int ii = method_param_count - 1;
1369                                         Type type_a, type_b;
1370                                         do {
1371                                                 type_a = parameters.Types [ii];
1372                                                 type_b = p_types [ii];
1373
1374                                                 if (TypeManager.IsGenericParameter (type_a) && type_a.DeclaringMethod != null)
1375                                                         type_a = typeof (TypeParameter);
1376
1377                                                 if (TypeManager.IsGenericParameter (type_b) && type_b.DeclaringMethod != null)
1378                                                         type_b = typeof (TypeParameter);
1379
1380                                                 if ((pd.FixedParameters [ii].ModFlags & Parameter.Modifier.ISBYREF) !=
1381                                                         (parameters.FixedParameters [ii].ModFlags & Parameter.Modifier.ISBYREF))
1382                                                         break;
1383
1384                                         } while (TypeManager.IsEqual (type_a, type_b) && ii-- != 0);
1385
1386                                         if (ii >= 0)
1387                                                 continue;
1388
1389                                         //
1390                                         // Operators can differ in return type only
1391                                         //
1392                                         if (member is Operator) {
1393                                                 Operator op = TypeManager.GetMethod ((MethodBase) ce.Member) as Operator;
1394                                                 if (op != null && op.ReturnType != ((Operator) member).ReturnType)
1395                                                         continue;
1396                                         }
1397
1398                                         //
1399                                         // Report difference in parameter modifiers only
1400                                         //
1401                                         if (pd != null && member is MethodCore) {
1402                                                 ii = method_param_count;
1403                                                 while (ii-- != 0 && parameters.FixedParameters [ii].ModFlags == pd.FixedParameters [ii].ModFlags &&
1404                                                         parameters.ExtensionMethodType == pd.ExtensionMethodType);
1405
1406                                                 if (ii >= 0) {
1407                                                         MethodCore mc = TypeManager.GetMethod ((MethodBase) ce.Member) as MethodCore;
1408                                                         Report.SymbolRelatedToPreviousError (ce.Member);
1409                                                         if ((member.ModFlags & Modifiers.PARTIAL) != 0 && (mc.ModFlags & Modifiers.PARTIAL) != 0) {
1410                                                                 if (parameters.HasParams || pd.HasParams) {
1411                                                                         Report.Error (758, member.Location,
1412                                                                                 "A partial method declaration and partial method implementation cannot differ on use of `params' modifier");
1413                                                                 } else {
1414                                                                         Report.Error (755, member.Location,
1415                                                                                 "A partial method declaration and partial method implementation must be both an extension method or neither");
1416                                                                 }
1417                                                         } else {
1418                                                                 if (member is Constructor) {
1419                                                                         Report.Error (851, member.Location,
1420                                                                                 "Overloaded contructor `{0}' cannot differ on use of parameter modifiers only",
1421                                                                                 member.GetSignatureForError ());
1422                                                                 } else {
1423                                                                         Report.Error (663, member.Location,
1424                                                                                 "Overloaded method `{0}' cannot differ on use of parameter modifiers only",
1425                                                                                 member.GetSignatureForError ());
1426                                                                 }
1427                                                         }
1428                                                         return false;
1429                                                 }
1430                                         }
1431                                 }
1432
1433                                 if ((ce.EntryType & EntryType.Method) != 0) {
1434                                         Method method_a = member as Method;
1435                                         Method method_b = TypeManager.GetMethod ((MethodBase) ce.Member) as Method;
1436                                         if (method_a != null && method_b != null && (method_a.ModFlags & method_b.ModFlags & Modifiers.PARTIAL) != 0) {
1437                                                 const Modifiers partial_modifiers = Modifiers.STATIC | Modifiers.UNSAFE;
1438                                                 if (method_a.IsPartialDefinition == method_b.IsPartialImplementation) {
1439                                                         if ((method_a.ModFlags & partial_modifiers) == (method_b.ModFlags & partial_modifiers) ||
1440                                                                 method_a.Parent.IsUnsafe && method_b.Parent.IsUnsafe) {
1441                                                                 if (method_a.IsPartialImplementation) {
1442                                                                         method_a.SetPartialDefinition (method_b);
1443                                                                         entries.RemoveAt (i);
1444                                                                 } else {
1445                                                                         method_b.SetPartialDefinition (method_a);
1446                                                                         method_a.caching_flags |= MemberCore.Flags.PartialDefinitionExists;
1447                                                                 }
1448                                                                 continue;
1449                                                         }
1450
1451                                                         if ((method_a.ModFlags & Modifiers.STATIC) != (method_b.ModFlags & Modifiers.STATIC)) {
1452                                                                 Report.SymbolRelatedToPreviousError (ce.Member);
1453                                                                 Report.Error (763, member.Location,
1454                                                                         "A partial method declaration and partial method implementation must be both `static' or neither");
1455                                                         }
1456
1457                                                         Report.SymbolRelatedToPreviousError (ce.Member);
1458                                                         Report.Error (764, member.Location,
1459                                                                 "A partial method declaration and partial method implementation must be both `unsafe' or neither");
1460                                                         return false;
1461                                                 }
1462
1463                                                 Report.SymbolRelatedToPreviousError (ce.Member);
1464                                                 if (method_a.IsPartialDefinition) {
1465                                                         Report.Error (756, member.Location, "A partial method `{0}' declaration is already defined",
1466                                                                 member.GetSignatureForError ());
1467                                                 } else {
1468                                                         Report.Error (757, member.Location, "A partial method `{0}' implementation is already defined",
1469                                                                 member.GetSignatureForError ());
1470                                                 }
1471
1472                                                 return false;
1473                                         }
1474
1475                                         Report.SymbolRelatedToPreviousError (ce.Member);
1476                                         IMethodData duplicate_member = TypeManager.GetMethod ((MethodBase) ce.Member);
1477                                         if (member is Operator && duplicate_member is Operator) {
1478                                                 Report.Error (557, member.Location, "Duplicate user-defined conversion in type `{0}'",
1479                                                         member.Parent.GetSignatureForError ());
1480                                                 return false;
1481                                         }
1482
1483                                         bool is_reserved_a = member is AbstractPropertyEventMethod || member is Operator;
1484                                         bool is_reserved_b = duplicate_member is AbstractPropertyEventMethod || duplicate_member is Operator;
1485
1486                                         if (is_reserved_a || is_reserved_b) {
1487                                                 Report.Error (82, member.Location, "A member `{0}' is already reserved",
1488                                                         is_reserved_a ?
1489                                                         TypeManager.GetFullNameSignature (ce.Member) :
1490                                                         member.GetSignatureForError ());
1491                                                 return false;
1492                                         }
1493                                 } else {
1494                                         Report.SymbolRelatedToPreviousError (ce.Member);
1495                                 }
1496
1497                                 Report.Error (111, member.Location,
1498                                         "A member `{0}' is already defined. Rename this member or use different parameter types",
1499                                         member.GetSignatureForError ());
1500                                 return false;
1501                         }
1502
1503                         return true;
1504                 }
1505         }
1506 }