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;
451 int cio = check_type_name.LastIndexOf ('+');
452 string container = check_type_name.Substring (0, cio);
455 // Check if the check_type is a nested class of the current type
457 if (check_type_name.StartsWith (container + "+"))
463 // Access level of a type.
465 enum AccessLevel { // Each column represents `is this scope larger or equal to Blah scope'
466 // Public Assembly Protected
467 Protected = (0 << 0) | (0 << 1) | (X << 2),
468 Public = (X << 0) | (X << 1) | (X << 2),
469 Private = (0 << 0) | (0 << 1) | (0 << 2),
470 Internal = (0 << 0) | (X << 1) | (0 << 2),
471 ProtectedOrInternal = (0 << 0) | (X << 1) | (X << 2),
474 static AccessLevel GetAccessLevelFromModifiers (int flags)
476 if ((flags & Modifiers.INTERNAL) != 0) {
478 if ((flags & Modifiers.PROTECTED) != 0)
479 return AccessLevel.ProtectedOrInternal;
481 return AccessLevel.Internal;
483 } else if ((flags & Modifiers.PROTECTED) != 0)
484 return AccessLevel.Protected;
486 else if ((flags & Modifiers.PRIVATE) != 0)
487 return AccessLevel.Private;
490 return AccessLevel.Public;
493 // What is the effective access level of this?
495 AccessLevel EffectiveAccessLevel {
497 AccessLevel myAccess = GetAccessLevelFromModifiers (ModFlags);
498 if (!IsTopLevel && (Parent != null))
499 return myAccess & Parent.EffectiveAccessLevel;
505 // Return the access level for type `t'
506 static AccessLevel TypeEffectiveAccessLevel (Type t)
509 return AccessLevel.Public;
510 if (t.IsNestedPrivate)
511 return AccessLevel.Private;
513 return AccessLevel.Internal;
515 // By now, it must be nested
516 AccessLevel parentLevel = TypeEffectiveAccessLevel (t.DeclaringType);
518 if (t.IsNestedPublic)
520 if (t.IsNestedAssembly)
521 return parentLevel & AccessLevel.Internal;
522 if (t.IsNestedFamily)
523 return parentLevel & AccessLevel.Protected;
524 if (t.IsNestedFamORAssem)
525 return parentLevel & AccessLevel.ProtectedOrInternal;
526 if (t.IsNestedFamANDAssem)
527 throw new NotImplementedException ("NestedFamANDAssem not implemented, cant make this kind of type from c# anyways");
529 // nested private is taken care of
531 throw new Exception ("I give up, what are you?");
535 // This answers `is the type P, as accessible as a member M which has the
536 // accessability @flags which is declared as a nested member of the type T, this declspace'
538 public bool AsAccessible (Type p, int flags)
541 // 1) if M is private, its accessability is the same as this declspace.
542 // we already know that P is accessible to T before this method, so we
546 if ((flags & Modifiers.PRIVATE) != 0)
549 while (p.IsArray || p.IsPointer || p.IsByRef)
550 p = TypeManager.GetElementType (p);
552 AccessLevel pAccess = TypeEffectiveAccessLevel (p);
553 AccessLevel mAccess = this.EffectiveAccessLevel &
554 GetAccessLevelFromModifiers (flags);
556 // for every place from which we can access M, we must
557 // be able to access P as well. So, we want
558 // For every bit in M and P, M_i -> P_1 == true
559 // or, ~ (M -> P) == 0 <-> ~ ( ~M | P) == 0
561 return ~ (~ mAccess | pAccess) == 0;
564 static DoubleHash dh = new DoubleHash (1000);
566 Type LookupInterfaceOrClass (string ns, string name, out bool error)
574 if (dh.Lookup (ns, name, out r))
578 if (Namespace.IsNamespace (ns)){
579 string fullname = (ns != "") ? ns + "." + name : name;
580 t = TypeManager.LookupType (fullname);
584 t = TypeManager.LookupType (name);
588 dh.Insert (ns, name, t);
593 // In case we are fed a composite name, normalize it.
595 int p = name.LastIndexOf ('.');
597 ns = MakeFQN (ns, name.Substring (0, p));
598 name = name.Substring (p+1);
601 parent = RootContext.Tree.LookupByNamespace (ns, name);
602 if (parent == null) {
603 dh.Insert (ns, name, null);
607 t = parent.DefineType ();
613 dh.Insert (ns, name, t);
617 public static void Error_AmbiguousTypeReference (Location loc, string name, Type t1, Type t2)
619 Report.Error (104, loc,
620 String.Format ("`{0}' is an ambiguous reference ({1} or {2}) ", name,
621 t1.FullName, t2.FullName));
625 /// GetType is used to resolve type names at the DeclSpace level.
626 /// Use this to lookup class/struct bases, interface bases or
627 /// delegate type references
631 /// Contrast this to LookupType which is used inside method bodies to
632 /// lookup types that have already been defined. GetType is used
633 /// during the tree resolution process and potentially define
634 /// recursively the type
636 public Type FindType (Location loc, string name)
642 // For the case the type we are looking for is nested within this one
643 // or is in any base class
645 DeclSpace containing_ds = this;
647 while (containing_ds != null){
648 Type container_type = containing_ds.TypeBuilder;
649 Type current_type = container_type;
651 while (current_type != null && current_type != TypeManager.object_type) {
652 string pre = current_type.FullName;
654 t = LookupInterfaceOrClass (pre, name, out error);
658 if ((t != null) && containing_ds.CheckAccessLevel (t))
661 current_type = current_type.BaseType;
663 containing_ds = containing_ds.Parent;
667 // Attempt to lookup the class on our namespace and all it's implicit parents
669 for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.ImplicitParent) {
670 t = LookupInterfaceOrClass (ns.FullName, name, out error);
679 // Attempt to do a direct unqualified lookup
681 t = LookupInterfaceOrClass ("", name, out error);
689 // Attempt to lookup the class on any of the `using'
693 for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.Parent){
695 t = LookupInterfaceOrClass (ns.FullName, name, out error);
703 // Now check the using clause list
706 foreach (Namespace using_ns in ns.GetUsingTable ()) {
707 match = LookupInterfaceOrClass (using_ns.Name, name, out error);
713 if (CheckAccessLevel (match)) {
714 Error_AmbiguousTypeReference (loc, name, t, match);
727 //Report.Error (246, Location, "Can not find type `"+name+"'");
732 /// This function is broken and not what you're looking for. It should only
733 /// be used while the type is still being created since it doesn't use the cache
734 /// and relies on the filter doing the member name check.
736 public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
737 MemberFilter filter, object criteria);
740 /// If we have a MemberCache, return it. This property may return null if the
741 /// class doesn't have a member cache or while it's still being created.
743 public abstract MemberCache MemberCache {
749 /// This is a readonly list of MemberInfo's.
751 public class MemberList : IList {
752 public readonly IList List;
756 /// Create a new MemberList from the given IList.
758 public MemberList (IList list)
763 this.List = new ArrayList ();
768 /// Concatenate the ILists `first' and `second' to a new MemberList.
770 public MemberList (IList first, IList second)
772 ArrayList list = new ArrayList ();
773 list.AddRange (first);
774 list.AddRange (second);
779 public static readonly MemberList Empty = new MemberList (new ArrayList ());
782 /// Cast the MemberList into a MemberInfo[] array.
785 /// This is an expensive operation, only use it if it's really necessary.
787 public static explicit operator MemberInfo [] (MemberList list)
789 Timer.StartTimer (TimerType.MiscTimer);
790 MemberInfo [] result = new MemberInfo [list.Count];
791 list.CopyTo (result, 0);
792 Timer.StopTimer (TimerType.MiscTimer);
804 public bool IsSynchronized {
806 return List.IsSynchronized;
810 public object SyncRoot {
812 return List.SyncRoot;
816 public void CopyTo (Array array, int index)
818 List.CopyTo (array, index);
823 public IEnumerator GetEnumerator ()
825 return List.GetEnumerator ();
830 public bool IsFixedSize {
836 public bool IsReadOnly {
842 object IList.this [int index] {
848 throw new NotSupportedException ();
852 // FIXME: try to find out whether we can avoid the cast in this indexer.
853 public MemberInfo this [int index] {
855 return (MemberInfo) List [index];
859 public int Add (object value)
861 throw new NotSupportedException ();
866 throw new NotSupportedException ();
869 public bool Contains (object value)
871 return List.Contains (value);
874 public int IndexOf (object value)
876 return List.IndexOf (value);
879 public void Insert (int index, object value)
881 throw new NotSupportedException ();
884 public void Remove (object value)
886 throw new NotSupportedException ();
889 public void RemoveAt (int index)
891 throw new NotSupportedException ();
896 /// This interface is used to get all members of a class when creating the
897 /// member cache. It must be implemented by all DeclSpace derivatives which
898 /// want to support the member cache and by TypeHandle to get caching of
899 /// non-dynamic types.
901 public interface IMemberContainer {
903 /// The name of the IMemberContainer. This is only used for
904 /// debugging purposes.
911 /// The type of this IMemberContainer.
918 /// Returns the IMemberContainer of the parent class or null if this
919 /// is an interface or TypeManger.object_type.
920 /// This is used when creating the member cache for a class to get all
921 /// members from the parent class.
923 IMemberContainer Parent {
928 /// Whether this is an interface.
935 /// Returns all members of this class with the corresponding MemberTypes
936 /// and BindingFlags.
939 /// When implementing this method, make sure not to return any inherited
940 /// members and check the MemberTypes and BindingFlags properly.
941 /// Unfortunately, System.Reflection is lame and doesn't provide a way to
942 /// get the BindingFlags (static/non-static,public/non-public) in the
943 /// MemberInfo class, but the cache needs this information. That's why
944 /// this method is called multiple times with different BindingFlags.
946 MemberList GetMembers (MemberTypes mt, BindingFlags bf);
949 /// Return the container's member cache.
951 MemberCache MemberCache {
957 /// The MemberCache is used by dynamic and non-dynamic types to speed up
958 /// member lookups. It has a member name based hash table; it maps each member
959 /// name to a list of CacheEntry objects. Each CacheEntry contains a MemberInfo
960 /// and the BindingFlags that were initially used to get it. The cache contains
961 /// all members of the current class and all inherited members. If this cache is
962 /// for an interface types, it also contains all inherited members.
964 /// There are two ways to get a MemberCache:
965 /// * if this is a dynamic type, lookup the corresponding DeclSpace and then
966 /// use the DeclSpace.MemberCache property.
967 /// * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
968 /// TypeHandle instance for the type and then use TypeHandle.MemberCache.
970 public class MemberCache {
971 public readonly IMemberContainer Container;
972 protected Hashtable member_hash;
973 protected Hashtable method_hash;
975 Hashtable interface_hash;
978 /// Create a new MemberCache for the given IMemberContainer `container'.
980 public MemberCache (IMemberContainer container)
982 this.Container = container;
984 Timer.IncrementCounter (CounterType.MemberCache);
985 Timer.StartTimer (TimerType.CacheInit);
989 // If we have a parent class (we have a parent class unless we're
990 // TypeManager.object_type), we deep-copy its MemberCache here.
991 if (Container.IsInterface) {
993 interface_hash = new Hashtable ();
995 if (Container.Parent != null)
996 parent = Container.Parent.MemberCache;
998 parent = TypeHandle.ObjectType.MemberCache;
999 member_hash = SetupCacheForInterface (parent);
1000 } else if (Container.Parent != null)
1001 member_hash = SetupCache (Container.Parent.MemberCache);
1003 member_hash = new Hashtable ();
1005 // If this is neither a dynamic type nor an interface, create a special
1006 // method cache with all declared and inherited methods.
1007 Type type = container.Type;
1008 if (!(type is TypeBuilder) && !type.IsInterface) {
1009 method_hash = new Hashtable ();
1013 // Add all members from the current class.
1014 AddMembers (Container);
1016 Timer.StopTimer (TimerType.CacheInit);
1020 /// Bootstrap this member cache by doing a deep-copy of our parent.
1022 Hashtable SetupCache (MemberCache parent)
1024 Hashtable hash = new Hashtable ();
1026 IDictionaryEnumerator it = parent.member_hash.GetEnumerator ();
1027 while (it.MoveNext ()) {
1028 hash [it.Key] = ((ArrayList) it.Value).Clone ();
1036 /// Add the contents of `new_hash' to `hash'.
1038 void AddHashtable (Hashtable hash, Hashtable new_hash)
1040 IDictionaryEnumerator it = new_hash.GetEnumerator ();
1041 while (it.MoveNext ()) {
1042 ArrayList list = (ArrayList) hash [it.Key];
1044 list.AddRange ((ArrayList) it.Value);
1046 hash [it.Key] = ((ArrayList) it.Value).Clone ();
1051 /// Bootstrap the member cache for an interface type.
1052 /// Type.GetMembers() won't return any inherited members for interface types,
1053 /// so we need to do this manually. Interfaces also inherit from System.Object.
1055 Hashtable SetupCacheForInterface (MemberCache parent)
1057 Hashtable hash = SetupCache (parent);
1058 TypeExpr [] ifaces = TypeManager.GetInterfaces (Container.Type);
1060 foreach (TypeExpr iface in ifaces) {
1061 Type itype = iface.Type;
1063 if (interface_hash.Contains (itype))
1066 interface_hash [itype] = null;
1068 IMemberContainer iface_container =
1069 TypeManager.LookupMemberContainer (itype);
1071 MemberCache iface_cache = iface_container.MemberCache;
1073 AddHashtable (hash, iface_cache.member_hash);
1075 if (iface_cache.interface_hash == null)
1078 foreach (Type parent_contains in iface_cache.interface_hash.Keys)
1079 interface_hash [parent_contains] = null;
1086 /// Add all members from class `container' to the cache.
1088 void AddMembers (IMemberContainer container)
1090 // We need to call AddMembers() with a single member type at a time
1091 // to get the member type part of CacheEntry.EntryType right.
1092 AddMembers (MemberTypes.Constructor, container);
1093 AddMembers (MemberTypes.Field, container);
1094 AddMembers (MemberTypes.Method, container);
1095 AddMembers (MemberTypes.Property, container);
1096 AddMembers (MemberTypes.Event, container);
1097 // Nested types are returned by both Static and Instance searches.
1098 AddMembers (MemberTypes.NestedType,
1099 BindingFlags.Static | BindingFlags.Public, container);
1100 AddMembers (MemberTypes.NestedType,
1101 BindingFlags.Static | BindingFlags.NonPublic, container);
1104 void AddMembers (MemberTypes mt, IMemberContainer container)
1106 AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
1107 AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
1108 AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
1109 AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
1113 /// Add all members from class `container' with the requested MemberTypes and
1114 /// BindingFlags to the cache. This method is called multiple times with different
1115 /// MemberTypes and BindingFlags.
1117 void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
1119 MemberList members = container.GetMembers (mt, bf);
1121 foreach (MemberInfo member in members) {
1122 string name = member.Name;
1124 // We use a name-based hash table of ArrayList's.
1125 ArrayList list = (ArrayList) member_hash [name];
1127 list = new ArrayList ();
1128 member_hash.Add (name, list);
1131 // When this method is called for the current class, the list will
1132 // already contain all inherited members from our parent classes.
1133 // We cannot add new members in front of the list since this'd be an
1134 // expensive operation, that's why the list is sorted in reverse order
1135 // (ie. members from the current class are coming last).
1136 list.Add (new CacheEntry (container, member, mt, bf));
1141 /// Add all declared and inherited methods from class `type' to the method cache.
1143 void AddMethods (Type type)
1145 AddMethods (BindingFlags.Static | BindingFlags.Public |
1146 BindingFlags.FlattenHierarchy, type);
1147 AddMethods (BindingFlags.Static | BindingFlags.NonPublic |
1148 BindingFlags.FlattenHierarchy, type);
1149 AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
1150 AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
1153 void AddMethods (BindingFlags bf, Type type)
1155 MemberInfo [] members = type.GetMethods (bf);
1157 Array.Reverse (members);
1159 foreach (MethodBase member in members) {
1160 string name = member.Name;
1162 // Varargs methods aren't allowed in C# code.
1163 if ((member.CallingConvention & CallingConventions.VarArgs) != 0)
1166 // We use a name-based hash table of ArrayList's.
1167 ArrayList list = (ArrayList) method_hash [name];
1169 list = new ArrayList ();
1170 method_hash.Add (name, list);
1173 // Unfortunately, the elements returned by Type.GetMethods() aren't
1174 // sorted so we need to do this check for every member.
1175 BindingFlags new_bf = bf;
1176 if (member.DeclaringType == type)
1177 new_bf |= BindingFlags.DeclaredOnly;
1179 list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
1186 /// Compute and return a appropriate `EntryType' magic number for the given
1187 /// MemberTypes and BindingFlags.
1189 protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
1191 EntryType type = EntryType.None;
1193 if ((mt & MemberTypes.Constructor) != 0)
1194 type |= EntryType.Constructor;
1195 if ((mt & MemberTypes.Event) != 0)
1196 type |= EntryType.Event;
1197 if ((mt & MemberTypes.Field) != 0)
1198 type |= EntryType.Field;
1199 if ((mt & MemberTypes.Method) != 0)
1200 type |= EntryType.Method;
1201 if ((mt & MemberTypes.Property) != 0)
1202 type |= EntryType.Property;
1203 // Nested types are returned by static and instance searches.
1204 if ((mt & MemberTypes.NestedType) != 0)
1205 type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;
1207 if ((bf & BindingFlags.Instance) != 0)
1208 type |= EntryType.Instance;
1209 if ((bf & BindingFlags.Static) != 0)
1210 type |= EntryType.Static;
1211 if ((bf & BindingFlags.Public) != 0)
1212 type |= EntryType.Public;
1213 if ((bf & BindingFlags.NonPublic) != 0)
1214 type |= EntryType.NonPublic;
1215 if ((bf & BindingFlags.DeclaredOnly) != 0)
1216 type |= EntryType.Declared;
1222 /// The `MemberTypes' enumeration type is a [Flags] type which means that it may
1223 /// denote multiple member types. Returns true if the given flags value denotes a
1224 /// single member types.
1226 public static bool IsSingleMemberType (MemberTypes mt)
1229 case MemberTypes.Constructor:
1230 case MemberTypes.Event:
1231 case MemberTypes.Field:
1232 case MemberTypes.Method:
1233 case MemberTypes.Property:
1234 case MemberTypes.NestedType:
1243 /// We encode the MemberTypes and BindingFlags of each members in a "magic"
1244 /// number to speed up the searching process.
1247 protected enum EntryType {
1252 MaskStatic = Instance|Static,
1256 MaskProtection = Public|NonPublic,
1260 Constructor = 0x020,
1267 MaskType = Constructor|Event|Field|Method|Property|NestedType
1270 protected struct CacheEntry {
1271 public readonly IMemberContainer Container;
1272 public readonly EntryType EntryType;
1273 public readonly MemberInfo Member;
1275 public CacheEntry (IMemberContainer container, MemberInfo member,
1276 MemberTypes mt, BindingFlags bf)
1278 this.Container = container;
1279 this.Member = member;
1280 this.EntryType = GetEntryType (mt, bf);
1285 /// This is called each time we're walking up one level in the class hierarchy
1286 /// and checks whether we can abort the search since we've already found what
1287 /// we were looking for.
1289 protected bool DoneSearching (ArrayList list)
1292 // We've found exactly one member in the current class and it's not
1293 // a method or constructor.
1295 if (list.Count == 1 && !(list [0] is MethodBase))
1299 // Multiple properties: we query those just to find out the indexer
1302 if ((list.Count > 0) && (list [0] is PropertyInfo))
1309 /// Looks up members with name `name'. If you provide an optional
1310 /// filter function, it'll only be called with members matching the
1311 /// requested member name.
1313 /// This method will try to use the cache to do the lookup if possible.
1315 /// Unlike other FindMembers implementations, this method will always
1316 /// check all inherited members - even when called on an interface type.
1318 /// If you know that you're only looking for methods, you should use
1319 /// MemberTypes.Method alone since this speeds up the lookup a bit.
1320 /// When doing a method-only search, it'll try to use a special method
1321 /// cache (unless it's a dynamic type or an interface) and the returned
1322 /// MemberInfo's will have the correct ReflectedType for inherited methods.
1323 /// The lookup process will automatically restart itself in method-only
1324 /// search mode if it discovers that it's about to return methods.
1326 ArrayList global = new ArrayList ();
1327 bool using_global = false;
1329 public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
1330 MemberFilter filter, object criteria)
1333 throw new Exception ();
1335 bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
1336 bool method_search = mt == MemberTypes.Method;
1337 // If we have a method cache and we aren't already doing a method-only search,
1338 // then we restart a method search if the first match is a method.
1339 bool do_method_search = !method_search && (method_hash != null);
1341 ArrayList applicable;
1343 // If this is a method-only search, we try to use the method cache if
1344 // possible; a lookup in the method cache will return a MemberInfo with
1345 // the correct ReflectedType for inherited methods.
1347 if (method_search && (method_hash != null))
1348 applicable = (ArrayList) method_hash [name];
1350 applicable = (ArrayList) member_hash [name];
1352 if (applicable == null)
1353 return MemberList.Empty;
1356 // 32 slots gives 53 rss/54 size
1357 // 2/4 slots gives 55 rss
1359 // Strange: from 25,000 calls, only 1,800
1360 // are above 2. Why does this impact it?
1363 using_global = true;
1365 Timer.StartTimer (TimerType.CachedLookup);
1367 EntryType type = GetEntryType (mt, bf);
1369 IMemberContainer current = Container;
1371 // `applicable' is a list of all members with the given member name `name'
1372 // in the current class and all its parent classes. The list is sorted in
1373 // reverse order due to the way how the cache is initialy created (to speed
1374 // things up, we're doing a deep-copy of our parent).
1376 for (int i = applicable.Count-1; i >= 0; i--) {
1377 CacheEntry entry = (CacheEntry) applicable [i];
1379 // This happens each time we're walking one level up in the class
1380 // hierarchy. If we're doing a DeclaredOnly search, we must abort
1381 // the first time this happens (this may already happen in the first
1382 // iteration of this loop if there are no members with the name we're
1383 // looking for in the current class).
1384 if (entry.Container != current) {
1385 if (declared_only || DoneSearching (global))
1388 current = entry.Container;
1391 // Is the member of the correct type ?
1392 if ((entry.EntryType & type & EntryType.MaskType) == 0)
1395 // Is the member static/non-static ?
1396 if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
1399 // Apply the filter to it.
1400 if (filter (entry.Member, criteria)) {
1401 if ((entry.EntryType & EntryType.MaskType) != EntryType.Method)
1402 do_method_search = false;
1403 global.Add (entry.Member);
1407 Timer.StopTimer (TimerType.CachedLookup);
1409 // If we have a method cache and we aren't already doing a method-only
1410 // search, we restart in method-only search mode if the first match is
1411 // a method. This ensures that we return a MemberInfo with the correct
1412 // ReflectedType for inherited methods.
1413 if (do_method_search && (global.Count > 0)){
1414 using_global = false;
1416 return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
1419 using_global = false;
1420 MemberInfo [] copy = new MemberInfo [global.Count];
1421 global.CopyTo (copy);
1422 return new MemberList (copy);