2 // decl.cs: Declaration base class for structs, classes, enums and interfaces.
4 // Author: Miguel de Icaza (miguel@gnu.org)
6 // Licensed under the terms of the GNU GPL
8 // (C) 2001 Ximian, Inc (http://www.ximian.com)
10 // TODO: Move the method verification stuff from the class.cs and interface.cs here
14 using System.Collections;
15 using System.Reflection.Emit;
16 using System.Reflection;
18 namespace Mono.MonoBASIC {
21 /// Base representation for members. This is only used to keep track
22 /// of Name, Location and Modifier flags.
24 public abstract class MemberCore {
31 /// Modifier flags that the user specified in the source code
36 /// Location where this declaration happens
38 public readonly Location Location;
40 public MemberCore (string name, Location loc)
46 protected void WarningNotHiding (TypeContainer parent)
50 "The member " + parent.MakeName (Name) + " does not hide an " +
51 "inherited member. The keyword new is not required");
55 void Error_CannotChangeAccessModifiers (TypeContainer parent, MethodInfo parent_method,
59 // FIXME: report the old/new permissions?
62 507, Location, parent.MakeName (Name) +
63 ": can't change the access modifiers when overriding inherited " +
64 "member `" + name + "'");
68 // Performs various checks on the MethodInfo `mb' regarding the modifier flags
69 // that have been defined.
71 // `name' is the user visible name for reporting errors (this is used to
72 // provide the right name regarding method names and properties)
74 protected bool CheckMethodAgainstBase (TypeContainer parent, MethodAttributes my_attrs,
75 MethodInfo mb, string name)
79 if ((ModFlags & Modifiers.OVERRIDE) != 0){
80 if (!(mb.IsAbstract || mb.IsVirtual)){
82 506, Location, parent.MakeName (Name) +
83 ": cannot override inherited member `" +
84 name + "' because it is not " +
85 "virtual, abstract or override");
89 // Now we check that the overriden method is not final
92 Report.Error (239, Location, parent.MakeName (Name) + " : cannot " +
93 "override inherited member `" + name +
94 "' because it is sealed.");
99 // Check that the permissions are not being changed
101 MethodAttributes thisp = my_attrs & MethodAttributes.MemberAccessMask;
102 MethodAttributes parentp = mb.Attributes & MethodAttributes.MemberAccessMask;
104 if (thisp != parentp){
105 Error_CannotChangeAccessModifiers (parent, mb, name);
110 if (mb.IsVirtual || mb.IsAbstract){
111 if ((ModFlags & (Modifiers.NEW | Modifiers.OVERRIDE | Modifiers.SHADOWS)) == 0){
112 if (Name != "Finalize"){
114 40005, 2, Location, parent.MakeName (Name) +
115 " shadows overridable member `" + name +
116 "'. To make the current member override that " +
117 "implementation, add the overrides keyword." );
118 ModFlags |= Modifiers.SHADOWS;
122 if ((ModFlags & (Modifiers.NEW | Modifiers.OVERRIDE |
123 Modifiers.SHADOWS)) == 0)
125 if (Name != "Finalize"){
127 40004, 1, Location, "The keyword Shadows is required on " +
128 parent.MakeName (Name) + " because it hides " +
129 "inherited member `" + name + "'");
130 ModFlags |= Modifiers.SHADOWS;
138 public abstract bool Define (TypeContainer parent);
141 // Whehter is it ok to use an unsafe pointer in this type container
143 public bool UnsafeOK (DeclSpace parent)
146 // First check if this MemberCore modifier flags has unsafe set
148 if ((ModFlags & Modifiers.UNSAFE) != 0)
151 if (parent.UnsafeContext)
154 Expression.UnsafeError (Location);
160 // FIXME: This is temporary outside DeclSpace, because I have to fix a bug
161 // in MCS that makes it fail the lookup for the enum
165 /// The result value from adding an declaration into
166 /// a struct or a class
168 public enum AdditionResult {
170 /// The declaration has been successfully
171 /// added to the declation space.
176 /// The symbol has already been defined.
181 /// Returned if the declation being added to the
182 /// name space clashes with its container name.
184 /// The only exceptions for this are constructors
185 /// and static constructors
190 /// Returned if a constructor was created (because syntactically
191 /// it looked like a constructor) but was not (because the name
192 /// of the method is not the same as the container class
197 /// This is only used by static constructors to emit the
198 /// error 111, but this error for other things really
199 /// happens at another level for other functions.
205 /// Base class for structs, classes, enumerations and interfaces.
208 /// They all create new declaration spaces. This
209 /// provides the common foundation for managing those name
212 public abstract class DeclSpace : MemberCore {
214 /// this points to the actual definition that is being
215 /// created with System.Reflection.Emit
217 public TypeBuilder TypeBuilder;
220 /// This variable tracks whether we have Closed the type
222 public bool Created = false;
225 // This is the namespace in which this typecontainer
226 // was declared. We use this to resolve names.
228 public Namespace Namespace;
230 public Hashtable Cache = new Hashtable ();
232 public string Basename;
235 /// defined_names is used for toplevel objects
237 protected Hashtable defined_names;
239 TypeContainer parent;
241 public DeclSpace (TypeContainer parent, string name, Location l)
244 Basename = name.Substring (1 + name.LastIndexOf ('.'));
245 defined_names = new Hashtable ();
246 this.parent = parent;
250 /// Returns a status code based purely on the name
251 /// of the member being added
253 protected AdditionResult IsValid (string name)
255 if (name == Basename)
256 return AdditionResult.EnclosingClash;
258 if (defined_names.Contains (name))
259 return AdditionResult.NameExists;
261 return AdditionResult.Success;
265 /// Introduce @name into this declaration space and
266 /// associates it with the object @o. Note that for
267 /// methods this will just point to the first method. o
269 protected void DefineName (string name, object o)
271 defined_names.Add (name, o);
275 /// Returns the object associated with a given name in the declaration
276 /// space. This is the inverse operation of `DefineName'
278 public object GetDefinition (string name)
280 return defined_names [name];
283 bool in_transit = false;
286 /// This function is used to catch recursive definitions
289 public bool InTransit {
299 public TypeContainer Parent {
306 /// Looks up the alias for the name
308 public string LookupAlias (string name)
310 return RootContext.SourceBeingCompiled.LookupAlias (name);
314 // root_types contains all the types. All TopLevel types
315 // hence have a parent that points to `root_types', that is
316 // why there is a non-obvious test down here.
318 public bool IsTopLevel {
321 if (parent.parent == null)
328 public virtual void CloseType ()
332 TypeBuilder.CreateType ();
335 // The try/catch is needed because
336 // nested enumerations fail to load when they
339 // Even if this is the right order (enumerations
340 // declared after types).
342 // Note that this still creates the type and
343 // it is possible to save it
350 /// Should be overriten by the appropriate declaration space
352 public abstract TypeBuilder DefineType ();
355 /// Define all members, but don't apply any attributes or do anything which may
356 /// access not-yet-defined classes. This method also creates the MemberCache.
358 public abstract bool DefineMembers (TypeContainer parent);
361 // Whether this is an `unsafe context'
363 public bool UnsafeContext {
365 if ((ModFlags & Modifiers.UNSAFE) != 0)
368 return parent.UnsafeContext;
373 public static string MakeFQN (string nsn, string name)
375 string prefix = (nsn == "" ? "" : nsn + ".");
377 return prefix + name;
380 EmitContext type_resolve_ec;
381 EmitContext GetTypeResolveEmitContext (TypeContainer parent, Location loc)
383 type_resolve_ec = new EmitContext (parent, this, loc, null, null, ModFlags, false);
384 type_resolve_ec.ResolvingTypeTree = true;
386 return type_resolve_ec;
390 // Looks up the type, as parsed into the expression `e'
392 public Type ResolveType (Expression e, bool silent, Location loc)
394 if (type_resolve_ec == null)
395 type_resolve_ec = GetTypeResolveEmitContext (parent, loc);
396 type_resolve_ec.loc = loc;
398 int errors = Report.Errors;
399 Expression d = e.Resolve (type_resolve_ec, ResolveFlags.Type);
400 if (d == null || d.eclass != ExprClass.Type){
401 if (!silent && errors == Report.Errors){
402 Report.Error (246, loc, "Cannot find type `"+ e.ToString () +"'");
411 // Resolves the expression `e' for a type, and will recursively define
414 public Expression ResolveTypeExpr (Expression e, bool silent, Location loc)
416 if (type_resolve_ec == null)
417 type_resolve_ec = GetTypeResolveEmitContext (parent, loc);
419 Expression d = e.Resolve (type_resolve_ec, ResolveFlags.Type);
420 if (d == null || d.eclass != ExprClass.Type){
422 Report.Error (246, loc, "Cannot find type `"+ e +"'");
430 Type LookupInterfaceOrClass (string ns, string name, out bool error)
436 name = MakeFQN (ns, name);
438 t = TypeManager.LookupType (name);
442 parent = (DeclSpace) RootContext.Tree.Decls [name];
446 t = parent.DefineType ();
448 Report.Error (146, Location, "Class definition is circular: `"+name+"'");
455 public static void Error_AmbiguousTypeReference (Location loc, string name, Type t1, Type t2)
457 Report.Error (104, loc,
458 String.Format ("`{0}' is an ambiguous reference ({1} or {2}) ", name,
459 t1.FullName, t2.FullName));
463 /// GetType is used to resolve type names at the DeclSpace level.
464 /// Use this to lookup class/struct bases, interface bases or
465 /// delegate type references
469 /// Contrast this to LookupType which is used inside method bodies to
470 /// lookup types that have already been defined. GetType is used
471 /// during the tree resolution process and potentially define
472 /// recursively the type
474 public Type FindType (Location loc, string name)
480 // For the case the type we are looking for is nested within this one
481 // or is in any base class
483 DeclSpace containing_ds = this;
485 while (containing_ds != null){
486 Type current_type = containing_ds.TypeBuilder;
488 while (current_type != null) {
489 string pre = current_type.FullName;
491 t = LookupInterfaceOrClass (pre, name, out error);
498 current_type = current_type.BaseType;
500 containing_ds = containing_ds.Parent;
504 // Attempt to lookup the class on our namespace and all it's implicit parents
506 for (string ns = Namespace.Name; ns != null; ns = RootContext.ImplicitParent (ns)) {
508 t = LookupInterfaceOrClass (ns, name, out error);
517 // Attempt to do a direct unqualified lookup
519 t = LookupInterfaceOrClass ("", name, out error);
527 // Attempt to lookup the class on any of the `using'
531 for (Namespace ns = Namespace; ns != null; ns = ns.Parent){
533 t = LookupInterfaceOrClass (ns.Name, name, out error);
541 // Now check the using clause list
543 ICollection imports_list = RootContext.SourceBeingCompiled.ImportsTable;
\r
545 if (imports_list == null)
\r
549 foreach (SourceBeingCompiled.ImportsEntry ue in imports_list){
550 match = LookupInterfaceOrClass (ue.Name, name, out error);
556 Error_AmbiguousTypeReference (loc, name, t, match);
568 //Report.Error (246, Location, "Can not find type `"+name+"'");
573 /// This function is broken and not what you're looking for. It should only
574 /// be used while the type is still being created since it doesn't use the cache
575 /// and relies on the filter doing the member name check.
577 public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
578 MemberFilter filter, object criteria);
581 /// If we have a MemberCache, return it. This property may return null if the
582 /// class doesn't have a member cache or while it's still being created.
584 public abstract MemberCache MemberCache {
590 /// This is a readonly list of MemberInfo's.
592 public class MemberList : IList {
593 public readonly IList List;
597 /// Create a new MemberList from the given IList.
599 public MemberList (IList list)
604 this.List = new ArrayList ();
609 /// Concatenate the ILists `first' and `second' to a new MemberList.
611 public MemberList (IList first, IList second)
613 ArrayList list = new ArrayList ();
614 list.AddRange (first);
615 list.AddRange (second);
620 public static readonly MemberList Empty = new MemberList (new ArrayList ());
623 /// Cast the MemberList into a MemberInfo[] array.
626 /// This is an expensive operation, only use it if it's really necessary.
628 public static explicit operator MemberInfo [] (MemberList list)
630 Timer.StartTimer (TimerType.MiscTimer);
631 MemberInfo [] result = new MemberInfo [list.Count];
632 list.CopyTo (result, 0);
633 Timer.StopTimer (TimerType.MiscTimer);
645 public bool IsSynchronized {
647 return List.IsSynchronized;
651 public object SyncRoot {
653 return List.SyncRoot;
657 public void CopyTo (Array array, int index)
659 List.CopyTo (array, index);
664 public IEnumerator GetEnumerator ()
666 return List.GetEnumerator ();
671 public bool IsFixedSize {
677 public bool IsReadOnly {
683 object IList.this [int index] {
689 throw new NotSupportedException ();
693 // FIXME: try to find out whether we can avoid the cast in this indexer.
694 public MemberInfo this [int index] {
696 return (MemberInfo) List [index];
700 public int Add (object value)
702 throw new NotSupportedException ();
707 throw new NotSupportedException ();
710 public bool Contains (object value)
712 return List.Contains (value);
715 public int IndexOf (object value)
717 return List.IndexOf (value);
720 public void Insert (int index, object value)
722 throw new NotSupportedException ();
725 public void Remove (object value)
727 throw new NotSupportedException ();
730 public void RemoveAt (int index)
732 throw new NotSupportedException ();
737 /// This interface is used to get all members of a class when creating the
738 /// member cache. It must be implemented by all DeclSpace derivatives which
739 /// want to support the member cache and by TypeHandle to get caching of
740 /// non-dynamic types.
742 public interface IMemberContainer {
744 /// The name of the IMemberContainer. This is only used for
745 /// debugging purposes.
752 /// The type of this IMemberContainer.
759 /// Returns the IMemberContainer of the parent class or null if this
760 /// is an interface or TypeManger.object_type.
761 /// This is used when creating the member cache for a class to get all
762 /// members from the parent class.
764 IMemberContainer Parent {
769 /// Whether this is an interface.
776 /// Returns all members of this class with the corresponding MemberTypes
777 /// and BindingFlags.
780 /// When implementing this method, make sure not to return any inherited
781 /// members and check the MemberTypes and BindingFlags properly.
782 /// Unfortunately, System.Reflection is lame and doesn't provide a way to
783 /// get the BindingFlags (static/non-static,public/non-public) in the
784 /// MemberInfo class, but the cache needs this information. That's why
785 /// this method is called multiple times with different BindingFlags.
787 MemberList GetMembers (MemberTypes mt, BindingFlags bf);
790 /// Return the container's member cache.
792 MemberCache MemberCache {
798 /// The MemberCache is used by dynamic and non-dynamic types to speed up
799 /// member lookups. It has a member name based hash table; it maps each member
800 /// name to a list of CacheEntry objects. Each CacheEntry contains a MemberInfo
801 /// and the BindingFlags that were initially used to get it. The cache contains
802 /// all members of the current class and all inherited members. If this cache is
803 /// for an interface types, it also contains all inherited members.
805 /// There are two ways to get a MemberCache:
806 /// * if this is a dynamic type, lookup the corresponding DeclSpace and then
807 /// use the DeclSpace.MemberCache property.
808 /// * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
809 /// TypeHandle instance for the type and then use TypeHandle.MemberCache.
811 public class MemberCache {
812 public readonly IMemberContainer Container;
813 protected CaseInsensitiveHashtable member_hash;
814 protected CaseInsensitiveHashtable method_hash;
815 protected CaseInsensitiveHashtable interface_hash;
818 /// Create a new MemberCache for the given IMemberContainer `container'.
820 public MemberCache (IMemberContainer container)
822 this.Container = container;
824 Timer.IncrementCounter (CounterType.MemberCache);
825 Timer.StartTimer (TimerType.CacheInit);
827 interface_hash = new CaseInsensitiveHashtable ();
829 // If we have a parent class (we have a parent class unless we're
830 // TypeManager.object_type), we deep-copy its MemberCache here.
831 if (Container.Parent != null)
832 member_hash = SetupCache (Container.Parent.MemberCache);
833 else if (Container.IsInterface)
834 member_hash = SetupCacheForInterface ();
836 member_hash = new CaseInsensitiveHashtable ();
838 // If this is neither a dynamic type nor an interface, create a special
839 // method cache with all declared and inherited methods.
840 Type type = container.Type;
841 if (!(type is TypeBuilder) && !type.IsInterface) {
842 method_hash = new CaseInsensitiveHashtable ();
846 // Add all members from the current class.
847 AddMembers (Container);
849 Timer.StopTimer (TimerType.CacheInit);
853 /// Bootstrap this member cache by doing a deep-copy of our parent.
855 CaseInsensitiveHashtable SetupCache (MemberCache parent)
857 CaseInsensitiveHashtable hash = new CaseInsensitiveHashtable ();
859 IDictionaryEnumerator it = parent.member_hash.GetEnumerator ();
860 while (it.MoveNext ()) {
861 hash [it.Key] = ((ArrayList) it.Value).Clone ();
867 void AddInterfaces (MemberCache parent)
869 foreach (Type iface in parent.interface_hash.Keys) {
870 if (!interface_hash.Contains (iface))
871 interface_hash.Add (iface, true);
876 /// Add the contents of `new_hash' to `hash'.
878 void AddHashtable (Hashtable hash, Hashtable new_hash)
880 IDictionaryEnumerator it = new_hash.GetEnumerator ();
881 while (it.MoveNext ()) {
882 ArrayList list = (ArrayList) hash [it.Key];
884 list.AddRange ((ArrayList) it.Value);
886 hash [it.Key] = ((ArrayList) it.Value).Clone ();
891 /// Bootstrap the member cache for an interface type.
892 /// Type.GetMembers() won't return any inherited members for interface types,
893 /// so we need to do this manually. Interfaces also inherit from System.Object.
895 CaseInsensitiveHashtable SetupCacheForInterface ()
897 CaseInsensitiveHashtable hash = SetupCache (TypeHandle.ObjectType.MemberCache);
898 Type [] ifaces = TypeManager.GetInterfaces (Container.Type);
900 foreach (Type iface in ifaces) {
901 if (interface_hash.Contains (iface))
903 interface_hash.Add (iface, true);
905 IMemberContainer iface_container =
906 TypeManager.LookupMemberContainer (iface);
908 MemberCache iface_cache = iface_container.MemberCache;
909 AddHashtable (hash, iface_cache.member_hash);
910 AddInterfaces (iface_cache);
917 /// Add all members from class `container' to the cache.
919 void AddMembers (IMemberContainer container)
921 // We need to call AddMembers() with a single member type at a time
922 // to get the member type part of CacheEntry.EntryType right.
923 AddMembers (MemberTypes.Constructor, container);
924 AddMembers (MemberTypes.Field, container);
925 AddMembers (MemberTypes.Method, container);
926 AddMembers (MemberTypes.Property, container);
927 AddMembers (MemberTypes.Event, container);
928 // Nested types are returned by both Static and Instance searches.
929 AddMembers (MemberTypes.NestedType,
930 BindingFlags.Static | BindingFlags.Public, container);
931 AddMembers (MemberTypes.NestedType,
932 BindingFlags.Static | BindingFlags.NonPublic, container);
935 void AddMembers (MemberTypes mt, IMemberContainer container)
937 AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
938 AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
939 AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
940 AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
944 /// Add all members from class `container' with the requested MemberTypes and
945 /// BindingFlags to the cache. This method is called multiple times with different
946 /// MemberTypes and BindingFlags.
948 void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
950 MemberList members = container.GetMembers (mt, bf);
951 BindingFlags new_bf = (container == Container) ?
952 bf | BindingFlags.DeclaredOnly : bf;
954 foreach (MemberInfo member in members) {
955 string name = member.Name;
957 // We use a name-based hash table of ArrayList's.
958 ArrayList list = (ArrayList) member_hash [name];
960 list = new ArrayList ();
961 member_hash.Add (name, list);
964 // When this method is called for the current class, the list will
965 // already contain all inherited members from our parent classes.
966 // We cannot add new members in front of the list since this'd be an
967 // expensive operation, that's why the list is sorted in reverse order
968 // (ie. members from the current class are coming last).
969 list.Add (new CacheEntry (container, member, mt, bf));
974 /// Add all declared and inherited methods from class `type' to the method cache.
976 void AddMethods (Type type)
978 AddMethods (BindingFlags.Static | BindingFlags.Public, type);
979 AddMethods (BindingFlags.Static | BindingFlags.NonPublic, type);
980 AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
981 AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
984 void AddMethods (BindingFlags bf, Type type)
986 MemberInfo [] members = type.GetMethods (bf);
988 foreach (MethodBase member in members) {
989 string name = member.Name;
991 // Varargs methods aren't allowed in C# code.
992 if ((member.CallingConvention & CallingConventions.VarArgs) != 0)
995 // We use a name-based hash table of ArrayList's.
996 ArrayList list = (ArrayList) method_hash [name];
998 list = new ArrayList ();
999 method_hash.Add (name, list);
1002 // Unfortunately, the elements returned by Type.GetMethods() aren't
1003 // sorted so we need to do this check for every member.
1004 BindingFlags new_bf = bf;
1005 if (member.DeclaringType == type)
1006 new_bf |= BindingFlags.DeclaredOnly;
1008 list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
1013 /// Compute and return a appropriate `EntryType' magic number for the given
1014 /// MemberTypes and BindingFlags.
1016 protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
1018 EntryType type = EntryType.None;
1020 if ((mt & MemberTypes.Constructor) != 0)
1021 type |= EntryType.Constructor;
1022 if ((mt & MemberTypes.Event) != 0)
1023 type |= EntryType.Event;
1024 if ((mt & MemberTypes.Field) != 0)
1025 type |= EntryType.Field;
1026 if ((mt & MemberTypes.Method) != 0)
1027 type |= EntryType.Method;
1028 if ((mt & MemberTypes.Property) != 0)
1029 type |= EntryType.Property;
1030 // Nested types are returned by static and instance searches.
1031 if ((mt & MemberTypes.NestedType) != 0)
1032 type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;
1034 if ((bf & BindingFlags.Instance) != 0)
1035 type |= EntryType.Instance;
1036 if ((bf & BindingFlags.Static) != 0)
1037 type |= EntryType.Static;
1038 if ((bf & BindingFlags.Public) != 0)
1039 type |= EntryType.Public;
1040 if ((bf & BindingFlags.NonPublic) != 0)
1041 type |= EntryType.NonPublic;
1042 if ((bf & BindingFlags.DeclaredOnly) != 0)
1043 type |= EntryType.Declared;
1049 /// The `MemberTypes' enumeration type is a [Flags] type which means that it may
1050 /// denote multiple member types. Returns true if the given flags value denotes a
1051 /// single member types.
1053 public static bool IsSingleMemberType (MemberTypes mt)
1056 case MemberTypes.Constructor:
1057 case MemberTypes.Event:
1058 case MemberTypes.Field:
1059 case MemberTypes.Method:
1060 case MemberTypes.Property:
1061 case MemberTypes.NestedType:
1070 /// We encode the MemberTypes and BindingFlags of each members in a "magic"
1071 /// number to speed up the searching process.
1074 protected enum EntryType {
1079 MaskStatic = Instance|Static,
1083 MaskProtection = Public|NonPublic,
1087 Constructor = 0x020,
1094 MaskType = Constructor|Event|Field|Method|Property|NestedType
1097 protected struct CacheEntry {
1098 public readonly IMemberContainer Container;
1099 public readonly EntryType EntryType;
1100 public readonly MemberInfo Member;
1102 public CacheEntry (IMemberContainer container, MemberInfo member,
1103 MemberTypes mt, BindingFlags bf)
1105 this.Container = container;
1106 this.Member = member;
1107 this.EntryType = GetEntryType (mt, bf);
1112 /// This is called each time we're walking up one level in the class hierarchy
1113 /// and checks whether we can abort the search since we've already found what
1114 /// we were looking for.
1116 protected bool DoneSearching (ArrayList list)
1119 // We've found exactly one member in the current class and it's not
1120 // a method or constructor.
1122 if (list.Count == 1 && !(list [0] is MethodBase))
1126 // Multiple properties: we query those just to find out the indexer
1129 if ((list.Count > 0) && (list [0] is PropertyInfo))
1136 /// Looks up members with name `name'. If you provide an optional
1137 /// filter function, it'll only be called with members matching the
1138 /// requested member name.
1140 /// This method will try to use the cache to do the lookup if possible.
1142 /// Unlike other FindMembers implementations, this method will always
1143 /// check all inherited members - even when called on an interface type.
1145 /// If you know that you're only looking for methods, you should use
1146 /// MemberTypes.Method alone since this speeds up the lookup a bit.
1147 /// When doing a method-only search, it'll try to use a special method
1148 /// cache (unless it's a dynamic type or an interface) and the returned
1149 /// MemberInfo's will have the correct ReflectedType for inherited methods.
1150 /// The lookup process will automatically restart itself in method-only
1151 /// search mode if it discovers that it's about to return methods.
1153 public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
1154 MemberFilter filter, object criteria)
1156 bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
1157 bool method_search = mt == MemberTypes.Method;
1158 // If we have a method cache and we aren't already doing a method-only search,
1159 // then we restart a method search if the first match is a method.
1160 bool do_method_search = !method_search && (method_hash != null);
1161 bf |= BindingFlags.IgnoreCase;
1162 ArrayList applicable;
1164 // If this is a method-only search, we try to use the method cache if
1165 // possible; a lookup in the method cache will return a MemberInfo with
1166 // the correct ReflectedType for inherited methods.
1167 if (method_search && (method_hash != null))
1168 applicable = (ArrayList) method_hash [name];
1170 applicable = (ArrayList) member_hash [name];
1172 if (applicable == null)
1173 return MemberList.Empty;
1175 ArrayList list = new ArrayList ();
1177 Timer.StartTimer (TimerType.CachedLookup);
1179 EntryType type = GetEntryType (mt, bf);
1181 IMemberContainer current = Container;
1183 // `applicable' is a list of all members with the given member name `name'
1184 // in the current class and all its parent classes. The list is sorted in
1185 // reverse order due to the way how the cache is initialy created (to speed
1186 // things up, we're doing a deep-copy of our parent).
1188 for (int i = applicable.Count-1; i >= 0; i--) {
1189 CacheEntry entry = (CacheEntry) applicable [i];
1191 // This happens each time we're walking one level up in the class
1192 // hierarchy. If we're doing a DeclaredOnly search, we must abort
1193 // the first time this happens (this may already happen in the first
1194 // iteration of this loop if there are no members with the name we're
1195 // looking for in the current class).
1196 if (entry.Container != current) {
1197 if (declared_only || DoneSearching (list))
1200 current = entry.Container;
1203 // Is the member of the correct type ?
1204 if ((entry.EntryType & type & EntryType.MaskType) == 0)
1207 // Is the member static/non-static ?
1208 if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
1211 // Apply the filter to it.
1212 if (filter (entry.Member, criteria)) {
1213 if ((entry.EntryType & EntryType.MaskType) != EntryType.Method)
1214 do_method_search = false;
1215 list.Add (entry.Member);
1219 Timer.StopTimer (TimerType.CachedLookup);
1221 // If we have a method cache and we aren't already doing a method-only
1222 // search, we restart in method-only search mode if the first match is
1223 // a method. This ensures that we return a MemberInfo with the correct
1224 // ReflectedType for inherited methods.
1225 if (do_method_search && (list.Count > 0))
1226 return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
1228 return new MemberList (list);