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.CSharp {
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 public abstract bool Define (TypeContainer parent);
49 // Whehter is it ok to use an unsafe pointer in this type container
51 public bool UnsafeOK (DeclSpace parent)
54 // First check if this MemberCore modifier flags has unsafe set
56 if ((ModFlags & Modifiers.UNSAFE) != 0)
59 if (parent.UnsafeContext)
62 Expression.UnsafeError (Location);
68 /// Base class for structs, classes, enumerations and interfaces.
71 /// They all create new declaration spaces. This
72 /// provides the common foundation for managing those name
75 public abstract class DeclSpace : MemberCore {
77 /// this points to the actual definition that is being
78 /// created with System.Reflection.Emit
80 public TypeBuilder TypeBuilder;
83 /// This variable tracks whether we have Closed the type
85 public bool Created = false;
88 // This is the namespace in which this typecontainer
89 // was declared. We use this to resolve names.
91 public NamespaceEntry NamespaceEntry;
93 public Hashtable Cache = new Hashtable ();
95 public string Basename;
98 /// defined_names is used for toplevel objects
100 protected Hashtable defined_names;
102 TypeContainer parent;
104 public DeclSpace (NamespaceEntry ns, TypeContainer parent, string name, Location l)
108 Basename = name.Substring (1 + name.LastIndexOf ('.'));
109 defined_names = new Hashtable ();
110 this.parent = parent;
113 public void RecordDecl ()
115 if ((NamespaceEntry != null) && (parent == RootContext.Tree.Types))
116 NamespaceEntry.DefineName (Basename, this);
120 /// The result value from adding an declaration into
121 /// a struct or a class
123 public enum AdditionResult {
125 /// The declaration has been successfully
126 /// added to the declation space.
131 /// The symbol has already been defined.
136 /// Returned if the declation being added to the
137 /// name space clashes with its container name.
139 /// The only exceptions for this are constructors
140 /// and static constructors
145 /// Returned if a constructor was created (because syntactically
146 /// it looked like a constructor) but was not (because the name
147 /// of the method is not the same as the container class
152 /// This is only used by static constructors to emit the
153 /// error 111, but this error for other things really
154 /// happens at another level for other functions.
159 /// Some other error.
165 /// Returns a status code based purely on the name
166 /// of the member being added
168 protected AdditionResult IsValid (string basename, string name)
170 if (basename == Basename)
171 return AdditionResult.EnclosingClash;
173 if (defined_names.Contains (name))
174 return AdditionResult.NameExists;
176 return AdditionResult.Success;
179 public static int length;
180 public static int small;
183 /// Introduce @name into this declaration space and
184 /// associates it with the object @o. Note that for
185 /// methods this will just point to the first method. o
187 protected void DefineName (string name, object o)
189 defined_names.Add (name, o);
192 int p = name.LastIndexOf ('.');
200 /// Returns the object associated with a given name in the declaration
201 /// space. This is the inverse operation of `DefineName'
203 public object GetDefinition (string name)
205 return defined_names [name];
208 bool in_transit = false;
211 /// This function is used to catch recursive definitions
214 public bool InTransit {
224 public TypeContainer Parent {
231 /// Looks up the alias for the name
233 public string LookupAlias (string name)
235 if (NamespaceEntry != null)
236 return NamespaceEntry.LookupAlias (name);
242 // root_types contains all the types. All TopLevel types
243 // hence have a parent that points to `root_types', that is
244 // why there is a non-obvious test down here.
246 public bool IsTopLevel {
249 if (parent.parent == null)
256 public virtual void CloseType ()
260 TypeBuilder.CreateType ();
263 // The try/catch is needed because
264 // nested enumerations fail to load when they
267 // Even if this is the right order (enumerations
268 // declared after types).
270 // Note that this still creates the type and
271 // it is possible to save it
278 /// Should be overriten by the appropriate declaration space
280 public abstract TypeBuilder DefineType ();
283 /// Define all members, but don't apply any attributes or do anything which may
284 /// access not-yet-defined classes. This method also creates the MemberCache.
286 public abstract bool DefineMembers (TypeContainer parent);
289 // Whether this is an `unsafe context'
291 public bool UnsafeContext {
293 if ((ModFlags & Modifiers.UNSAFE) != 0)
296 return parent.UnsafeContext;
301 public static string MakeFQN (string nsn, string name)
305 return String.Concat (nsn, ".", name);
308 EmitContext type_resolve_ec;
309 EmitContext GetTypeResolveEmitContext (TypeContainer parent, Location loc)
311 type_resolve_ec = new EmitContext (parent, this, loc, null, null, ModFlags, false);
312 type_resolve_ec.ResolvingTypeTree = true;
314 return type_resolve_ec;
318 // Looks up the type, as parsed into the expression `e'
320 public Type ResolveType (Expression e, bool silent, Location loc)
322 if (type_resolve_ec == null)
323 type_resolve_ec = GetTypeResolveEmitContext (parent, loc);
324 type_resolve_ec.loc = loc;
325 type_resolve_ec.ContainerType = TypeBuilder;
327 int errors = Report.Errors;
328 TypeExpr d = e.ResolveAsTypeTerminal (type_resolve_ec);
330 if (d == null || d.eclass != ExprClass.Type){
331 if (!silent && errors == Report.Errors){
332 Report.Error (246, loc, "Cannot find type `"+ e.ToString () +"'");
337 if (!d.CheckAccessLevel (this)) {
338 Report. Error (122, loc, "`" + d.Name + "' " +
339 "is inaccessible because of its protection level");
347 // Resolves the expression `e' for a type, and will recursively define
350 public TypeExpr ResolveTypeExpr (Expression e, bool silent, Location loc)
352 if (type_resolve_ec == null)
353 type_resolve_ec = GetTypeResolveEmitContext (parent, loc);
354 type_resolve_ec.loc = loc;
355 type_resolve_ec.ContainerType = TypeBuilder;
357 TypeExpr d = e.ResolveAsTypeTerminal (type_resolve_ec);
359 if (d == null || d.eclass != ExprClass.Type){
361 Report.Error (246, loc, "Cannot find type `"+ e +"'");
369 public bool CheckAccessLevel (Type check_type)
371 if (check_type == TypeBuilder)
374 TypeAttributes check_attr = check_type.Attributes & TypeAttributes.VisibilityMask;
377 // Broken Microsoft runtime, return public for arrays, no matter what
378 // the accessibility is for their underlying class, and they return
379 // NonPublic visibility for pointers
381 if (check_type.IsArray || check_type.IsPointer)
382 return CheckAccessLevel (TypeManager.GetElementType (check_type));
385 case TypeAttributes.Public:
388 case TypeAttributes.NotPublic:
390 // This test should probably use the declaringtype.
392 if (check_type.Assembly == TypeBuilder.Assembly){
397 case TypeAttributes.NestedPublic:
400 case TypeAttributes.NestedPrivate:
401 string check_type_name = check_type.FullName;
402 string type_name = TypeBuilder.FullName;
404 int cio = check_type_name.LastIndexOf ('+');
405 string container = check_type_name.Substring (0, cio);
408 // Check if the check_type is a nested class of the current type
410 if (check_type_name.StartsWith (type_name + "+")){
414 if (type_name.StartsWith (container)){
420 case TypeAttributes.NestedFamily:
422 // Only accessible to methods in current type or any subtypes
424 return FamilyAccessible (check_type);
426 case TypeAttributes.NestedFamANDAssem:
427 return (check_type.Assembly == TypeBuilder.Assembly) &&
428 FamilyAccessible (check_type);
430 case TypeAttributes.NestedFamORAssem:
431 return (check_type.Assembly == TypeBuilder.Assembly) ||
432 FamilyAccessible (check_type);
434 case TypeAttributes.NestedAssembly:
435 return check_type.Assembly == TypeBuilder.Assembly;
438 Console.WriteLine ("HERE: " + check_attr);
443 protected bool FamilyAccessible (Type check_type)
445 Type declaring = check_type.DeclaringType;
446 if (TypeBuilder.IsSubclassOf (declaring))
449 string check_type_name = check_type.FullName;
450 string type_name = TypeBuilder.FullName;
452 int cio = check_type_name.LastIndexOf ('+');
453 string container = check_type_name.Substring (0, cio);
456 // Check if the check_type is a nested class of the current type
458 if (check_type_name.StartsWith (container + "+"))
464 // Access level of a type.
467 ProtectedInternal = 1,
473 // Check whether `flags' denotes a more restricted access than `level'
474 // and return the new level.
475 static AccessLevel CheckAccessLevel (AccessLevel level, int flags)
477 AccessLevel old_level = level;
479 if ((flags & Modifiers.INTERNAL) != 0) {
480 if ((flags & Modifiers.PROTECTED) != 0) {
481 if ((int) level < (int) AccessLevel.ProtectedInternal)
482 level = AccessLevel.ProtectedInternal;
484 if ((int) level < (int) AccessLevel.Internal)
485 level = AccessLevel.Internal;
487 } else if ((flags & Modifiers.PROTECTED) != 0) {
488 if ((int) level < (int) AccessLevel.Protected)
489 level = AccessLevel.Protected;
490 } else if ((flags & Modifiers.PRIVATE) != 0)
491 level = AccessLevel.Private;
496 // Return the access level for a new member which is defined in the current
497 // TypeContainer with access modifiers `flags'.
498 AccessLevel GetAccessLevel (int flags)
500 if ((flags & Modifiers.PRIVATE) != 0)
501 return AccessLevel.Private;
504 if (!IsTopLevel && (Parent != null))
505 level = Parent.GetAccessLevel (flags);
507 level = AccessLevel.Public;
509 return CheckAccessLevel (CheckAccessLevel (level, flags), ModFlags);
512 // Return the access level for type `t', but don't give more access than `flags'.
513 static AccessLevel GetAccessLevel (Type t, int flags)
515 if (((flags & Modifiers.PRIVATE) != 0) || t.IsNestedPrivate)
516 return AccessLevel.Private;
519 if (TypeManager.IsBuiltinType (t))
520 return AccessLevel.Public;
521 else if ((t.DeclaringType != null) && (t != t.DeclaringType))
522 level = GetAccessLevel (t.DeclaringType, flags);
524 level = CheckAccessLevel (AccessLevel.Public, flags);
527 if (t.IsNestedPublic)
530 if (t.IsNestedAssembly || t.IsNotPublic) {
531 if ((int) level < (int) AccessLevel.Internal)
532 level = AccessLevel.Internal;
535 if (t.IsNestedFamily) {
536 if ((int) level < (int) AccessLevel.Protected)
537 level = AccessLevel.Protected;
540 if (t.IsNestedFamORAssem) {
541 if ((int) level < (int) AccessLevel.ProtectedInternal)
542 level = AccessLevel.ProtectedInternal;
549 // Returns true if `parent' is as accessible as the flags `flags'
550 // given for this member.
552 public bool AsAccessible (Type parent, int flags)
554 while (parent.IsArray || parent.IsPointer || parent.IsByRef)
555 parent = TypeManager.GetElementType (parent);
557 AccessLevel level = GetAccessLevel (flags);
558 AccessLevel level2 = GetAccessLevel (parent, flags);
560 return (int) level >= (int) level2;
563 static DoubleHash dh = new DoubleHash (1000);
565 Type LookupInterfaceOrClass (string ns, string name, out bool error)
573 if (dh.Lookup (ns, name, out r))
577 if (Namespace.IsNamespace (ns)){
578 string fullname = (ns != "") ? ns + "." + name : name;
579 t = TypeManager.LookupType (fullname);
583 t = TypeManager.LookupType (name);
587 dh.Insert (ns, name, t);
592 // In case we are fed a composite name, normalize it.
594 int p = name.LastIndexOf ('.');
596 ns = MakeFQN (ns, name.Substring (0, p));
597 name = name.Substring (p+1);
600 parent = RootContext.Tree.LookupByNamespace (ns, name);
601 if (parent == null) {
602 dh.Insert (ns, name, null);
606 t = parent.DefineType ();
612 dh.Insert (ns, name, t);
616 public static void Error_AmbiguousTypeReference (Location loc, string name, Type t1, Type t2)
618 Report.Error (104, loc,
619 String.Format ("`{0}' is an ambiguous reference ({1} or {2}) ", name,
620 t1.FullName, t2.FullName));
624 /// GetType is used to resolve type names at the DeclSpace level.
625 /// Use this to lookup class/struct bases, interface bases or
626 /// delegate type references
630 /// Contrast this to LookupType which is used inside method bodies to
631 /// lookup types that have already been defined. GetType is used
632 /// during the tree resolution process and potentially define
633 /// recursively the type
635 public Type FindType (Location loc, string name)
641 // For the case the type we are looking for is nested within this one
642 // or is in any base class
644 DeclSpace containing_ds = this;
646 while (containing_ds != null){
647 Type container_type = containing_ds.TypeBuilder;
648 Type current_type = container_type;
650 while (current_type != null && current_type != TypeManager.object_type) {
651 string pre = current_type.FullName;
653 t = LookupInterfaceOrClass (pre, name, out error);
657 if ((t != null) && containing_ds.CheckAccessLevel (t))
660 current_type = current_type.BaseType;
662 containing_ds = containing_ds.Parent;
666 // Attempt to lookup the class on our namespace and all it's implicit parents
668 for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.ImplicitParent) {
669 t = LookupInterfaceOrClass (ns.FullName, name, out error);
678 // Attempt to do a direct unqualified lookup
680 t = LookupInterfaceOrClass ("", name, out error);
688 // Attempt to lookup the class on any of the `using'
692 for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.Parent){
694 t = LookupInterfaceOrClass (ns.FullName, name, out error);
702 // Now check the using clause list
705 foreach (Namespace using_ns in ns.GetUsingTable ()) {
706 match = LookupInterfaceOrClass (using_ns.Name, name, out error);
712 if (CheckAccessLevel (match)) {
713 Error_AmbiguousTypeReference (loc, name, t, match);
726 //Report.Error (246, Location, "Can not find type `"+name+"'");
731 /// This function is broken and not what you're looking for. It should only
732 /// be used while the type is still being created since it doesn't use the cache
733 /// and relies on the filter doing the member name check.
735 public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
736 MemberFilter filter, object criteria);
739 /// If we have a MemberCache, return it. This property may return null if the
740 /// class doesn't have a member cache or while it's still being created.
742 public abstract MemberCache MemberCache {
748 /// This is a readonly list of MemberInfo's.
750 public class MemberList : IList {
751 public readonly IList List;
755 /// Create a new MemberList from the given IList.
757 public MemberList (IList list)
762 this.List = new ArrayList ();
767 /// Concatenate the ILists `first' and `second' to a new MemberList.
769 public MemberList (IList first, IList second)
771 ArrayList list = new ArrayList ();
772 list.AddRange (first);
773 list.AddRange (second);
778 public static readonly MemberList Empty = new MemberList (new ArrayList ());
781 /// Cast the MemberList into a MemberInfo[] array.
784 /// This is an expensive operation, only use it if it's really necessary.
786 public static explicit operator MemberInfo [] (MemberList list)
788 Timer.StartTimer (TimerType.MiscTimer);
789 MemberInfo [] result = new MemberInfo [list.Count];
790 list.CopyTo (result, 0);
791 Timer.StopTimer (TimerType.MiscTimer);
803 public bool IsSynchronized {
805 return List.IsSynchronized;
809 public object SyncRoot {
811 return List.SyncRoot;
815 public void CopyTo (Array array, int index)
817 List.CopyTo (array, index);
822 public IEnumerator GetEnumerator ()
824 return List.GetEnumerator ();
829 public bool IsFixedSize {
835 public bool IsReadOnly {
841 object IList.this [int index] {
847 throw new NotSupportedException ();
851 // FIXME: try to find out whether we can avoid the cast in this indexer.
852 public MemberInfo this [int index] {
854 return (MemberInfo) List [index];
858 public int Add (object value)
860 throw new NotSupportedException ();
865 throw new NotSupportedException ();
868 public bool Contains (object value)
870 return List.Contains (value);
873 public int IndexOf (object value)
875 return List.IndexOf (value);
878 public void Insert (int index, object value)
880 throw new NotSupportedException ();
883 public void Remove (object value)
885 throw new NotSupportedException ();
888 public void RemoveAt (int index)
890 throw new NotSupportedException ();
895 /// This interface is used to get all members of a class when creating the
896 /// member cache. It must be implemented by all DeclSpace derivatives which
897 /// want to support the member cache and by TypeHandle to get caching of
898 /// non-dynamic types.
900 public interface IMemberContainer {
902 /// The name of the IMemberContainer. This is only used for
903 /// debugging purposes.
910 /// The type of this IMemberContainer.
917 /// Returns the IMemberContainer of the parent class or null if this
918 /// is an interface or TypeManger.object_type.
919 /// This is used when creating the member cache for a class to get all
920 /// members from the parent class.
922 IMemberContainer Parent {
927 /// Whether this is an interface.
934 /// Returns all members of this class with the corresponding MemberTypes
935 /// and BindingFlags.
938 /// When implementing this method, make sure not to return any inherited
939 /// members and check the MemberTypes and BindingFlags properly.
940 /// Unfortunately, System.Reflection is lame and doesn't provide a way to
941 /// get the BindingFlags (static/non-static,public/non-public) in the
942 /// MemberInfo class, but the cache needs this information. That's why
943 /// this method is called multiple times with different BindingFlags.
945 MemberList GetMembers (MemberTypes mt, BindingFlags bf);
948 /// Return the container's member cache.
950 MemberCache MemberCache {
956 /// The MemberCache is used by dynamic and non-dynamic types to speed up
957 /// member lookups. It has a member name based hash table; it maps each member
958 /// name to a list of CacheEntry objects. Each CacheEntry contains a MemberInfo
959 /// and the BindingFlags that were initially used to get it. The cache contains
960 /// all members of the current class and all inherited members. If this cache is
961 /// for an interface types, it also contains all inherited members.
963 /// There are two ways to get a MemberCache:
964 /// * if this is a dynamic type, lookup the corresponding DeclSpace and then
965 /// use the DeclSpace.MemberCache property.
966 /// * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
967 /// TypeHandle instance for the type and then use TypeHandle.MemberCache.
969 public class MemberCache {
970 public readonly IMemberContainer Container;
971 protected Hashtable member_hash;
972 protected Hashtable method_hash;
973 protected Hashtable interface_hash;
976 /// Create a new MemberCache for the given IMemberContainer `container'.
978 public MemberCache (IMemberContainer container)
980 this.Container = container;
982 Timer.IncrementCounter (CounterType.MemberCache);
983 Timer.StartTimer (TimerType.CacheInit);
985 interface_hash = new Hashtable ();
987 // If we have a parent class (we have a parent class unless we're
988 // TypeManager.object_type), we deep-copy its MemberCache here.
989 if (Container.IsInterface) {
991 if (Container.Parent != null)
992 parent = Container.Parent.MemberCache;
994 parent = TypeHandle.ObjectType.MemberCache;
995 member_hash = SetupCacheForInterface (parent);
996 } else if (Container.Parent != null)
997 member_hash = SetupCache (Container.Parent.MemberCache);
999 member_hash = new Hashtable ();
1001 // If this is neither a dynamic type nor an interface, create a special
1002 // method cache with all declared and inherited methods.
1003 Type type = container.Type;
1004 if (!(type is TypeBuilder) && !type.IsInterface) {
1005 method_hash = new Hashtable ();
1009 // Add all members from the current class.
1010 AddMembers (Container);
1012 Timer.StopTimer (TimerType.CacheInit);
1016 /// Bootstrap this member cache by doing a deep-copy of our parent.
1018 Hashtable SetupCache (MemberCache parent)
1020 Hashtable hash = new Hashtable ();
1022 IDictionaryEnumerator it = parent.member_hash.GetEnumerator ();
1023 while (it.MoveNext ()) {
1024 hash [it.Key] = ((ArrayList) it.Value).Clone ();
1030 void AddInterfaces (MemberCache parent)
1032 foreach (Type iface in parent.interface_hash.Keys) {
1033 if (!interface_hash.Contains (iface))
1034 interface_hash.Add (iface, true);
1039 /// Add the contents of `new_hash' to `hash'.
1041 void AddHashtable (Hashtable hash, Hashtable new_hash)
1043 IDictionaryEnumerator it = new_hash.GetEnumerator ();
1044 while (it.MoveNext ()) {
1045 ArrayList list = (ArrayList) hash [it.Key];
1047 list.AddRange ((ArrayList) it.Value);
1049 hash [it.Key] = ((ArrayList) it.Value).Clone ();
1054 /// Bootstrap the member cache for an interface type.
1055 /// Type.GetMembers() won't return any inherited members for interface types,
1056 /// so we need to do this manually. Interfaces also inherit from System.Object.
1058 Hashtable SetupCacheForInterface (MemberCache parent)
1060 Hashtable hash = SetupCache (parent);
1061 TypeExpr [] ifaces = TypeManager.GetInterfaces (Container.Type);
1063 foreach (TypeExpr iface in ifaces) {
1064 Type itype = iface.Type;
1066 if (interface_hash.Contains (itype))
1068 interface_hash.Add (itype, true);
1070 IMemberContainer iface_container =
1071 TypeManager.LookupMemberContainer (itype);
1073 MemberCache iface_cache = iface_container.MemberCache;
1075 AddHashtable (hash, iface_cache.member_hash);
1076 AddInterfaces (iface_cache);
1083 /// Add all members from class `container' to the cache.
1085 void AddMembers (IMemberContainer container)
1087 // We need to call AddMembers() with a single member type at a time
1088 // to get the member type part of CacheEntry.EntryType right.
1089 AddMembers (MemberTypes.Constructor, container);
1090 AddMembers (MemberTypes.Field, container);
1091 AddMembers (MemberTypes.Method, container);
1092 AddMembers (MemberTypes.Property, container);
1093 AddMembers (MemberTypes.Event, container);
1094 // Nested types are returned by both Static and Instance searches.
1095 AddMembers (MemberTypes.NestedType,
1096 BindingFlags.Static | BindingFlags.Public, container);
1097 AddMembers (MemberTypes.NestedType,
1098 BindingFlags.Static | BindingFlags.NonPublic, container);
1101 void AddMembers (MemberTypes mt, IMemberContainer container)
1103 AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
1104 AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
1105 AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
1106 AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
1110 /// Add all members from class `container' with the requested MemberTypes and
1111 /// BindingFlags to the cache. This method is called multiple times with different
1112 /// MemberTypes and BindingFlags.
1114 void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
1116 MemberList members = container.GetMembers (mt, bf);
1117 BindingFlags new_bf = (container == Container) ?
1118 bf | BindingFlags.DeclaredOnly : bf;
1120 foreach (MemberInfo member in members) {
1121 string name = member.Name;
1123 // We use a name-based hash table of ArrayList's.
1124 ArrayList list = (ArrayList) member_hash [name];
1126 list = new ArrayList ();
1127 member_hash.Add (name, list);
1130 // When this method is called for the current class, the list will
1131 // already contain all inherited members from our parent classes.
1132 // We cannot add new members in front of the list since this'd be an
1133 // expensive operation, that's why the list is sorted in reverse order
1134 // (ie. members from the current class are coming last).
1135 list.Add (new CacheEntry (container, member, mt, bf));
1140 /// Add all declared and inherited methods from class `type' to the method cache.
1142 void AddMethods (Type type)
1144 AddMethods (BindingFlags.Static | BindingFlags.Public |
1145 BindingFlags.FlattenHierarchy, type);
1146 AddMethods (BindingFlags.Static | BindingFlags.NonPublic |
1147 BindingFlags.FlattenHierarchy, type);
1148 AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
1149 AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
1152 void AddMethods (BindingFlags bf, Type type)
1154 MemberInfo [] members = type.GetMethods (bf);
1156 Array.Reverse (members);
1158 foreach (MethodBase member in members) {
1159 string name = member.Name;
1161 // Varargs methods aren't allowed in C# code.
1162 if ((member.CallingConvention & CallingConventions.VarArgs) != 0)
1165 // We use a name-based hash table of ArrayList's.
1166 ArrayList list = (ArrayList) method_hash [name];
1168 list = new ArrayList ();
1169 method_hash.Add (name, list);
1172 // Unfortunately, the elements returned by Type.GetMethods() aren't
1173 // sorted so we need to do this check for every member.
1174 BindingFlags new_bf = bf;
1175 if (member.DeclaringType == type)
1176 new_bf |= BindingFlags.DeclaredOnly;
1178 list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
1185 /// Compute and return a appropriate `EntryType' magic number for the given
1186 /// MemberTypes and BindingFlags.
1188 protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
1190 EntryType type = EntryType.None;
1192 if ((mt & MemberTypes.Constructor) != 0)
1193 type |= EntryType.Constructor;
1194 if ((mt & MemberTypes.Event) != 0)
1195 type |= EntryType.Event;
1196 if ((mt & MemberTypes.Field) != 0)
1197 type |= EntryType.Field;
1198 if ((mt & MemberTypes.Method) != 0)
1199 type |= EntryType.Method;
1200 if ((mt & MemberTypes.Property) != 0)
1201 type |= EntryType.Property;
1202 // Nested types are returned by static and instance searches.
1203 if ((mt & MemberTypes.NestedType) != 0)
1204 type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;
1206 if ((bf & BindingFlags.Instance) != 0)
1207 type |= EntryType.Instance;
1208 if ((bf & BindingFlags.Static) != 0)
1209 type |= EntryType.Static;
1210 if ((bf & BindingFlags.Public) != 0)
1211 type |= EntryType.Public;
1212 if ((bf & BindingFlags.NonPublic) != 0)
1213 type |= EntryType.NonPublic;
1214 if ((bf & BindingFlags.DeclaredOnly) != 0)
1215 type |= EntryType.Declared;
1221 /// The `MemberTypes' enumeration type is a [Flags] type which means that it may
1222 /// denote multiple member types. Returns true if the given flags value denotes a
1223 /// single member types.
1225 public static bool IsSingleMemberType (MemberTypes mt)
1228 case MemberTypes.Constructor:
1229 case MemberTypes.Event:
1230 case MemberTypes.Field:
1231 case MemberTypes.Method:
1232 case MemberTypes.Property:
1233 case MemberTypes.NestedType:
1242 /// We encode the MemberTypes and BindingFlags of each members in a "magic"
1243 /// number to speed up the searching process.
1246 protected enum EntryType {
1251 MaskStatic = Instance|Static,
1255 MaskProtection = Public|NonPublic,
1259 Constructor = 0x020,
1266 MaskType = Constructor|Event|Field|Method|Property|NestedType
1269 protected struct CacheEntry {
1270 public readonly IMemberContainer Container;
1271 public readonly EntryType EntryType;
1272 public readonly MemberInfo Member;
1274 public CacheEntry (IMemberContainer container, MemberInfo member,
1275 MemberTypes mt, BindingFlags bf)
1277 this.Container = container;
1278 this.Member = member;
1279 this.EntryType = GetEntryType (mt, bf);
1284 /// This is called each time we're walking up one level in the class hierarchy
1285 /// and checks whether we can abort the search since we've already found what
1286 /// we were looking for.
1288 protected bool DoneSearching (ArrayList list)
1291 // We've found exactly one member in the current class and it's not
1292 // a method or constructor.
1294 if (list.Count == 1 && !(list [0] is MethodBase))
1298 // Multiple properties: we query those just to find out the indexer
1301 if ((list.Count > 0) && (list [0] is PropertyInfo))
1308 /// Looks up members with name `name'. If you provide an optional
1309 /// filter function, it'll only be called with members matching the
1310 /// requested member name.
1312 /// This method will try to use the cache to do the lookup if possible.
1314 /// Unlike other FindMembers implementations, this method will always
1315 /// check all inherited members - even when called on an interface type.
1317 /// If you know that you're only looking for methods, you should use
1318 /// MemberTypes.Method alone since this speeds up the lookup a bit.
1319 /// When doing a method-only search, it'll try to use a special method
1320 /// cache (unless it's a dynamic type or an interface) and the returned
1321 /// MemberInfo's will have the correct ReflectedType for inherited methods.
1322 /// The lookup process will automatically restart itself in method-only
1323 /// search mode if it discovers that it's about to return methods.
1325 ArrayList global = new ArrayList ();
1326 bool using_global = false;
1328 public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
1329 MemberFilter filter, object criteria)
1332 throw new Exception ();
1334 bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
1335 bool method_search = mt == MemberTypes.Method;
1336 // If we have a method cache and we aren't already doing a method-only search,
1337 // then we restart a method search if the first match is a method.
1338 bool do_method_search = !method_search && (method_hash != null);
1340 ArrayList applicable;
1342 // If this is a method-only search, we try to use the method cache if
1343 // possible; a lookup in the method cache will return a MemberInfo with
1344 // the correct ReflectedType for inherited methods.
1346 if (method_search && (method_hash != null))
1347 applicable = (ArrayList) method_hash [name];
1349 applicable = (ArrayList) member_hash [name];
1351 if (applicable == null)
1352 return MemberList.Empty;
1355 // 32 slots gives 53 rss/54 size
1356 // 2/4 slots gives 55 rss
1358 // Strange: from 25,000 calls, only 1,800
1359 // are above 2. Why does this impact it?
1362 using_global = true;
1364 Timer.StartTimer (TimerType.CachedLookup);
1366 EntryType type = GetEntryType (mt, bf);
1368 IMemberContainer current = Container;
1370 // `applicable' is a list of all members with the given member name `name'
1371 // in the current class and all its parent classes. The list is sorted in
1372 // reverse order due to the way how the cache is initialy created (to speed
1373 // things up, we're doing a deep-copy of our parent).
1375 for (int i = applicable.Count-1; i >= 0; i--) {
1376 CacheEntry entry = (CacheEntry) applicable [i];
1378 // This happens each time we're walking one level up in the class
1379 // hierarchy. If we're doing a DeclaredOnly search, we must abort
1380 // the first time this happens (this may already happen in the first
1381 // iteration of this loop if there are no members with the name we're
1382 // looking for in the current class).
1383 if (entry.Container != current) {
1384 if (declared_only || DoneSearching (global))
1387 current = entry.Container;
1390 // Is the member of the correct type ?
1391 if ((entry.EntryType & type & EntryType.MaskType) == 0)
1394 // Is the member static/non-static ?
1395 if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
1398 // Apply the filter to it.
1399 if (filter (entry.Member, criteria)) {
1400 if ((entry.EntryType & EntryType.MaskType) != EntryType.Method)
1401 do_method_search = false;
1402 global.Add (entry.Member);
1406 Timer.StopTimer (TimerType.CachedLookup);
1408 // If we have a method cache and we aren't already doing a method-only
1409 // search, we restart in method-only search mode if the first match is
1410 // a method. This ensures that we return a MemberInfo with the correct
1411 // ReflectedType for inherited methods.
1412 if (do_method_search && (global.Count > 0)){
1413 using_global = false;
1415 return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
1418 using_global = false;
1419 MemberInfo [] copy = new MemberInfo [global.Count];
1420 global.CopyTo (copy);
1421 return new MemberList (copy);