2 // decl.cs: Declaration base class for structs, classes, enums and interfaces.
4 // Author: Miguel de Icaza (miguel@gnu.org)
5 // Marek Safar (marek.safar@seznam.cz)
7 // Licensed under the terms of the GNU GPL
9 // (C) 2001 Ximian, Inc (http://www.ximian.com)
11 // TODO: Move the method verification stuff from the class.cs and interface.cs here
16 using System.Collections;
17 using System.Globalization;
18 using System.Reflection.Emit;
19 using System.Reflection;
21 namespace Mono.CSharp {
23 public class MemberName {
24 public readonly string Name;
25 public readonly TypeArguments TypeArguments;
27 public readonly MemberName Left;
29 public static readonly MemberName Null = new MemberName ("");
31 public MemberName (string name)
36 public MemberName (string name, TypeArguments args)
39 this.TypeArguments = args;
42 public MemberName (MemberName left, string name, TypeArguments args)
48 public MemberName (MemberName left, MemberName right)
49 : this (left, right.Name, right.TypeArguments)
53 public string GetName ()
56 return Left.GetName () + "." + Name;
61 public bool IsGeneric {
63 if (TypeArguments != null)
65 else if (Left != null)
66 return Left.IsGeneric;
72 public string GetName (bool is_generic)
74 string name = is_generic ? Basename : Name;
76 return Left.GetName (is_generic) + "." + name;
81 public int CountTypeArguments {
83 if (TypeArguments == null)
86 return TypeArguments.Count;
90 public string GetFullName ()
93 if (TypeArguments != null)
94 full_name = Name + "<" + TypeArguments + ">";
98 return Left.GetFullName () + "." + full_name;
103 public string GetTypeName (bool full)
106 if (full && (TypeArguments != null))
107 suffix = "!" + TypeArguments.Count;
109 return Left.GetTypeName (full) + "." + Name + suffix;
111 return Name + suffix;
114 public Expression GetTypeExpression (Location loc)
117 Expression lexpr = Left.GetTypeExpression (loc);
119 return new MemberAccess (lexpr, Name, TypeArguments, loc);
121 if (TypeArguments != null)
122 return new ConstructedType (Name, TypeArguments, loc);
124 return new SimpleName (Name, loc);
128 public string Basename {
130 if (TypeArguments != null)
131 return Name + "!" + TypeArguments.Count;
137 public override string ToString ()
140 if (TypeArguments != null)
141 full_name = Name + "<" + TypeArguments + ">";
146 return Left + "." + full_name;
153 /// Base representation for members. This is used to keep track
154 /// of Name, Location and Modifier flags, and handling Attributes.
156 public abstract class MemberCore : Attributable {
162 public readonly MemberName MemberName;
165 /// Modifier flags that the user specified in the source code
170 /// Location where this declaration happens
172 public readonly Location Location;
176 Obsolete_Undetected = 1, // Obsolete attribute has not been detected yet
177 Obsolete = 1 << 1, // Type has obsolete attribute
178 ClsCompliance_Undetected = 1 << 2, // CLS Compliance has not been detected yet
179 ClsCompliant = 1 << 3, // Type is CLS Compliant
180 CloseTypeCreated = 1 << 4, // Tracks whether we have Closed the type
181 HasCompliantAttribute_Undetected = 1 << 5, // Presence of CLSCompliantAttribute has not been detected
182 HasClsCompliantAttribute = 1 << 6, // Type has CLSCompliantAttribute
183 ClsCompliantAttributeTrue = 1 << 7, // Type has CLSCompliant (true)
184 Excluded_Undetected = 1 << 8, // Conditional attribute has not been detected yet
185 Excluded = 1 << 9 // Method is conditional
190 /// MemberCore flags at first detected then cached
192 protected Flags caching_flags;
194 public MemberCore (MemberName name, Attributes attrs, Location loc)
197 Name = name.GetName (!(this is GenericMethod) && !(this is Method));
200 caching_flags = Flags.Obsolete_Undetected | Flags.ClsCompliance_Undetected | Flags.HasCompliantAttribute_Undetected | Flags.Excluded_Undetected;
204 /// Tests presence of ObsoleteAttribute and report proper error
206 protected void CheckUsageOfObsoleteAttribute (Type type)
211 ObsoleteAttribute obsolete_attr = AttributeTester.GetObsoleteAttribute (type);
212 if (obsolete_attr == null)
215 AttributeTester.Report_ObsoleteMessage (obsolete_attr, type.FullName, Location);
218 public abstract bool Define (TypeContainer parent);
221 // Returns full member name for error message
223 public virtual string GetSignatureForError ()
229 /// Base Emit method. This is also entry point for CLS-Compliant verification.
231 public virtual void Emit (TypeContainer container)
233 VerifyObsoleteAttribute ();
235 if (!RootContext.VerifyClsCompliance)
238 VerifyClsCompliance (container);
242 // Whehter is it ok to use an unsafe pointer in this type container
244 public bool UnsafeOK (DeclSpace parent)
247 // First check if this MemberCore modifier flags has unsafe set
249 if ((ModFlags & Modifiers.UNSAFE) != 0)
252 if (parent.UnsafeContext)
255 Expression.UnsafeError (Location);
260 /// Returns instance of ObsoleteAttribute for this MemberCore
262 public ObsoleteAttribute GetObsoleteAttribute (DeclSpace ds)
264 // ((flags & (Flags.Obsolete_Undetected | Flags.Obsolete)) == 0) is slower, but why ?
265 if ((caching_flags & Flags.Obsolete_Undetected) == 0 && (caching_flags & Flags.Obsolete) == 0) {
269 caching_flags &= ~Flags.Obsolete_Undetected;
271 if (OptAttributes == null)
274 // TODO: remove this allocation
275 EmitContext ec = new EmitContext (ds.Parent, ds, ds.Location,
276 null, null, ds.ModFlags, false);
278 Attribute obsolete_attr = OptAttributes.Search (TypeManager.obsolete_attribute_type, ec);
279 if (obsolete_attr == null)
282 ObsoleteAttribute obsolete = obsolete_attr.GetObsoleteAttribute (ds);
283 if (obsolete == null)
286 caching_flags |= Flags.Obsolete;
291 /// Analyze whether CLS-Compliant verification must be execute for this MemberCore.
293 public override bool IsClsCompliaceRequired (DeclSpace container)
295 if ((caching_flags & Flags.ClsCompliance_Undetected) == 0)
296 return (caching_flags & Flags.ClsCompliant) != 0;
298 if (GetClsCompliantAttributeValue (container) && IsExposedFromAssembly (container)) {
299 caching_flags &= ~Flags.ClsCompliance_Undetected;
300 caching_flags |= Flags.ClsCompliant;
304 caching_flags &= ~Flags.ClsCompliance_Undetected;
309 /// Returns true when MemberCore is exposed from assembly.
311 protected bool IsExposedFromAssembly (DeclSpace ds)
313 if ((ModFlags & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
316 DeclSpace parentContainer = ds;
317 while (parentContainer != null && parentContainer.ModFlags != 0) {
318 if ((parentContainer.ModFlags & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
320 parentContainer = parentContainer.Parent;
326 /// Resolve CLSCompliantAttribute value or gets cached value.
328 bool GetClsCompliantAttributeValue (DeclSpace ds)
330 if (OptAttributes != null) {
331 EmitContext ec = new EmitContext (ds.Parent, ds, ds.Location,
332 null, null, ds.ModFlags, false);
333 Attribute cls_attribute = OptAttributes.GetClsCompliantAttribute (ec);
334 if (cls_attribute != null) {
335 caching_flags |= Flags.HasClsCompliantAttribute;
336 return cls_attribute.GetClsCompliantAttributeValue (ds);
339 return ds.GetClsCompliantAttributeValue ();
343 /// Returns true if MemberCore is explicitly marked with CLSCompliantAttribute
345 protected bool HasClsCompliantAttribute {
347 return (caching_flags & Flags.HasClsCompliantAttribute) != 0;
352 /// This method is used to testing error 3005 (Method or parameter name collision).
354 protected abstract bool IsIdentifierClsCompliant (DeclSpace ds);
357 /// Common helper method for identifier and parameters CLS-Compliant testing.
358 /// When return false error 3005 is reported. True means no violation.
359 /// And error 3006 tests are peformed here because of speed.
361 protected bool IsIdentifierAndParamClsCompliant (DeclSpace ds, string name, MemberInfo methodBuilder, Type[] paramTypes)
363 MemberList ml = ds.FindMembers (MemberTypes.Event | MemberTypes.Field | MemberTypes.Method | MemberTypes.Property,
364 BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance, System.Type.FilterNameIgnoreCase, name);
369 bool error3006 = false;
370 for (int i = 0; i < ml.Count; ++i) {
371 MemberInfo mi = ml [i];
372 if (name == mi.Name) {
373 MethodBase method = mi as MethodBase;
374 if (method == null || method == methodBuilder || paramTypes == null || paramTypes.Length == 0)
377 if (AttributeTester.AreOverloadedMethodParamsClsCompliant (paramTypes, TypeManager.GetArgumentTypes (method))) {
385 // We need to test if member is not marked as CLSCompliant (false) and if type is not only internal
386 // because BindingFlags.Public returns internal types too
387 DeclSpace temp_ds = TypeManager.LookupDeclSpace (mi.DeclaringType);
389 // Type is external, we can get attribute directly
390 if (temp_ds == null) {
391 object[] cls_attribute = mi.GetCustomAttributes (TypeManager.cls_compliant_attribute_type, false);
392 if (cls_attribute.Length == 1 && (!((CLSCompliantAttribute)cls_attribute[0]).IsCompliant))
395 string tmp_name = String.Concat (temp_ds.Name, '.', mi.Name);
397 MemberCore mc = temp_ds.GetDefinition (tmp_name) as MemberCore;
398 if (!mc.IsClsCompliaceRequired (ds))
402 for (int ii = 0; ii < ml.Count; ++ii) {
406 Report.SymbolRelatedToPreviousError (mi);
410 Report.Error_T (3006, Location, GetSignatureForError ());
419 /// The main virtual method for CLS-Compliant verifications.
420 /// The method returns true if member is CLS-Compliant and false if member is not
421 /// CLS-Compliant which means that CLS-Compliant tests are not necessary. A descendants override it
422 /// and add their extra verifications.
424 protected virtual bool VerifyClsCompliance (DeclSpace ds)
426 if (!IsClsCompliaceRequired (ds)) {
427 if (HasClsCompliantAttribute && !IsExposedFromAssembly (ds)) {
428 Report.Warning_T (3019, Location, GetSignatureForError ());
433 if (!CodeGen.Assembly.IsClsCompliant) {
434 if (HasClsCompliantAttribute) {
435 Report.Error_T (3014, Location, GetSignatureForError ());
439 int index = Name.LastIndexOf ('.');
440 if (Name [index > 0 ? index + 1 : 0] == '_') {
441 Report.Error_T (3008, Location, GetSignatureForError () );
444 if (!IsIdentifierClsCompliant (ds)) {
445 Report.Error_T (3005, Location, GetSignatureForError ());
451 protected abstract void VerifyObsoleteAttribute ();
456 /// Base class for structs, classes, enumerations and interfaces.
459 /// They all create new declaration spaces. This
460 /// provides the common foundation for managing those name
463 public abstract class DeclSpace : MemberCore, IAlias {
465 /// This points to the actual definition that is being
466 /// created with System.Reflection.Emit
468 public TypeBuilder TypeBuilder;
471 /// If we are a generic type, this is the type we are
472 /// currently defining. We need to lookup members on this
473 /// instead of the TypeBuilder.
475 public TypeExpr CurrentType;
478 // This is the namespace in which this typecontainer
479 // was declared. We use this to resolve names.
481 public NamespaceEntry NamespaceEntry;
483 public Hashtable Cache = new Hashtable ();
485 public string Basename;
488 /// defined_names is used for toplevel objects
490 protected Hashtable defined_names;
492 readonly bool is_generic;
493 readonly int count_type_params;
496 // Whether we are Generic
498 public bool IsGeneric {
502 else if (parent != null)
503 return parent.IsGeneric;
509 TypeContainer parent;
511 static string[] attribute_targets = new string [] { "type" };
513 public DeclSpace (NamespaceEntry ns, TypeContainer parent, MemberName name,
514 Attributes attrs, Location l)
515 : base (name, attrs, l)
518 Basename = name.Name;
519 defined_names = new Hashtable ();
520 if (name.TypeArguments != null) {
522 count_type_params = name.TypeArguments.Count;
525 count_type_params += parent.count_type_params;
526 this.parent = parent;
529 public void RecordDecl ()
531 if ((NamespaceEntry != null) && (parent == RootContext.Tree.Types))
532 NamespaceEntry.DefineName (MemberName.Basename, this);
536 /// The result value from adding an declaration into
537 /// a struct or a class
539 public enum AdditionResult {
541 /// The declaration has been successfully
542 /// added to the declation space.
547 /// The symbol has already been defined.
552 /// Returned if the declation being added to the
553 /// name space clashes with its container name.
555 /// The only exceptions for this are constructors
556 /// and static constructors
561 /// Returned if a constructor was created (because syntactically
562 /// it looked like a constructor) but was not (because the name
563 /// of the method is not the same as the container class
568 /// This is only used by static constructors to emit the
569 /// error 111, but this error for other things really
570 /// happens at another level for other functions.
575 /// Some other error.
581 /// Returns a status code based purely on the name
582 /// of the member being added
584 protected AdditionResult IsValid (string basename, string name)
586 if (basename == Basename)
587 return AdditionResult.EnclosingClash;
589 if (defined_names.Contains (name))
590 return AdditionResult.NameExists;
592 return AdditionResult.Success;
595 public static int length;
596 public static int small;
599 /// Introduce @name into this declaration space and
600 /// associates it with the object @o. Note that for
601 /// methods this will just point to the first method. o
603 public void DefineName (string name, object o)
605 defined_names.Add (name, o);
608 int p = name.LastIndexOf ('.');
616 /// Returns the object associated with a given name in the declaration
617 /// space. This is the inverse operation of `DefineName'
619 public object GetDefinition (string name)
621 return defined_names [name];
624 bool in_transit = false;
627 /// This function is used to catch recursive definitions
630 public bool InTransit {
640 public TypeContainer Parent {
647 /// Looks up the alias for the name
649 public IAlias LookupAlias (string name)
651 if (NamespaceEntry != null)
652 return NamespaceEntry.LookupAlias (name);
658 // root_types contains all the types. All TopLevel types
659 // hence have a parent that points to `root_types', that is
660 // why there is a non-obvious test down here.
662 public bool IsTopLevel {
665 if (parent.parent == null)
672 public virtual void CloseType ()
674 if ((caching_flags & Flags.CloseTypeCreated) == 0){
676 TypeBuilder.CreateType ();
679 // The try/catch is needed because
680 // nested enumerations fail to load when they
683 // Even if this is the right order (enumerations
684 // declared after types).
686 // Note that this still creates the type and
687 // it is possible to save it
689 caching_flags |= Flags.CloseTypeCreated;
694 /// Should be overriten by the appropriate declaration space
696 public abstract TypeBuilder DefineType ();
699 /// Define all members, but don't apply any attributes or do anything which may
700 /// access not-yet-defined classes. This method also creates the MemberCache.
702 public abstract bool DefineMembers (TypeContainer parent);
705 // Whether this is an `unsafe context'
707 public bool UnsafeContext {
709 if ((ModFlags & Modifiers.UNSAFE) != 0)
712 return parent.UnsafeContext;
717 public static string MakeFQN (string nsn, string name)
721 return String.Concat (nsn, ".", name);
724 EmitContext type_resolve_ec;
725 EmitContext GetTypeResolveEmitContext (TypeContainer parent, Location loc)
727 type_resolve_ec = new EmitContext (parent, this, loc, null, null, ModFlags, false);
728 type_resolve_ec.ResolvingTypeTree = true;
730 return type_resolve_ec;
734 // Looks up the type, as parsed into the expression `e'
736 public Type ResolveType (Expression e, bool silent, Location loc)
738 TypeExpr d = ResolveTypeExpr (e, silent, loc);
742 return ResolveType (d, loc);
745 public Type ResolveType (TypeExpr d, Location loc)
747 if (!d.CheckAccessLevel (this)) {
748 Report.Error_T (122, loc, d.Name);
752 Type t = d.ResolveType (type_resolve_ec);
756 TypeContainer tc = TypeManager.LookupTypeContainer (t);
757 if ((tc != null) && tc.IsGeneric) {
759 int tnum = TypeManager.GetNumberOfTypeArguments (t);
760 Report.Error (305, loc,
761 "Using the generic type `{0}' " +
762 "requires {1} type arguments",
763 TypeManager.GetFullName (t), tnum);
767 ConstructedType ctype = new ConstructedType (
768 t, TypeParameters, loc);
770 t = ctype.ResolveType (type_resolve_ec);
777 // Resolves the expression `e' for a type, and will recursively define
780 public TypeExpr ResolveTypeExpr (Expression e, bool silent, Location loc)
782 if (type_resolve_ec == null)
783 type_resolve_ec = GetTypeResolveEmitContext (parent, loc);
784 type_resolve_ec.loc = loc;
785 if (this is GenericMethod)
786 type_resolve_ec.ContainerType = Parent.TypeBuilder;
788 type_resolve_ec.ContainerType = TypeBuilder;
790 int errors = Report.Errors;
792 TypeExpr d = e.ResolveAsTypeTerminal (type_resolve_ec);
794 if ((d != null) && (d.eclass == ExprClass.Type))
797 if (silent || (Report.Errors != errors))
800 if (e is SimpleName){
801 SimpleName s = new SimpleName (((SimpleName) e).Name, loc);
802 d = s.ResolveAsTypeTerminal (type_resolve_ec);
804 if ((d == null) || (d.Type == null)) {
805 Report.Error (246, loc, "Cannot find type `{0}'", e);
809 int num_args = TypeManager.GetNumberOfTypeArguments (d.Type);
812 Report.Error (308, loc,
813 "The non-generic type `{0}' cannot " +
814 "be used with type arguments.",
815 TypeManager.CSharpName (d.Type));
819 Report.Error (305, loc,
820 "Using the generic type `{0}' " +
821 "requires {1} type arguments",
822 TypeManager.GetFullName (d.Type), num_args);
826 Report.Error (246, loc, "Cannot find type `{0}'", e);
830 public bool CheckAccessLevel (Type check_type)
833 if (this is GenericMethod)
834 tb = Parent.TypeBuilder;
838 if (check_type.IsGenericInstance)
839 check_type = check_type.GetGenericTypeDefinition ();
841 if (check_type == tb)
844 if (check_type.IsGenericParameter)
845 return true; // FIXME
847 TypeAttributes check_attr = check_type.Attributes & TypeAttributes.VisibilityMask;
850 // Broken Microsoft runtime, return public for arrays, no matter what
851 // the accessibility is for their underlying class, and they return
852 // NonPublic visibility for pointers
854 if (check_type.IsArray || check_type.IsPointer)
855 return CheckAccessLevel (TypeManager.GetElementType (check_type));
858 case TypeAttributes.Public:
861 case TypeAttributes.NotPublic:
863 // In same cases is null.
864 if (TypeBuilder == null)
868 // This test should probably use the declaringtype.
870 return check_type.Assembly == TypeBuilder.Assembly;
872 case TypeAttributes.NestedPublic:
875 case TypeAttributes.NestedPrivate:
876 string check_type_name = check_type.FullName;
877 string type_name = CurrentType != null ?
878 CurrentType.Name : tb.FullName;
880 int cio = check_type_name.LastIndexOf ('+');
881 string container = check_type_name.Substring (0, cio);
884 // Check if the check_type is a nested class of the current type
886 if (check_type_name.StartsWith (type_name + "+")){
890 if (type_name.StartsWith (container)){
896 case TypeAttributes.NestedFamily:
898 // Only accessible to methods in current type or any subtypes
900 return FamilyAccessible (tb, check_type);
902 case TypeAttributes.NestedFamANDAssem:
903 return (check_type.Assembly == tb.Assembly) &&
904 FamilyAccessible (tb, check_type);
906 case TypeAttributes.NestedFamORAssem:
907 return (check_type.Assembly == tb.Assembly) ||
908 FamilyAccessible (tb, check_type);
910 case TypeAttributes.NestedAssembly:
911 return check_type.Assembly == tb.Assembly;
914 Console.WriteLine ("HERE: " + check_attr);
919 protected bool FamilyAccessible (TypeBuilder tb, Type check_type)
921 Type declaring = check_type.DeclaringType;
922 if (tb.IsSubclassOf (declaring))
925 string check_type_name = check_type.FullName;
927 int cio = check_type_name.LastIndexOf ('+');
928 string container = check_type_name.Substring (0, cio);
931 // Check if the check_type is a nested class of the current type
933 if (check_type_name.StartsWith (container + "+"))
939 // Access level of a type.
941 enum AccessLevel { // Each column represents `is this scope larger or equal to Blah scope'
942 // Public Assembly Protected
943 Protected = (0 << 0) | (0 << 1) | (X << 2),
944 Public = (X << 0) | (X << 1) | (X << 2),
945 Private = (0 << 0) | (0 << 1) | (0 << 2),
946 Internal = (0 << 0) | (X << 1) | (0 << 2),
947 ProtectedOrInternal = (0 << 0) | (X << 1) | (X << 2),
950 static AccessLevel GetAccessLevelFromModifiers (int flags)
952 if ((flags & Modifiers.INTERNAL) != 0) {
954 if ((flags & Modifiers.PROTECTED) != 0)
955 return AccessLevel.ProtectedOrInternal;
957 return AccessLevel.Internal;
959 } else if ((flags & Modifiers.PROTECTED) != 0)
960 return AccessLevel.Protected;
961 else if ((flags & Modifiers.PRIVATE) != 0)
962 return AccessLevel.Private;
964 return AccessLevel.Public;
967 // What is the effective access level of this?
969 AccessLevel EffectiveAccessLevel {
971 AccessLevel myAccess = GetAccessLevelFromModifiers (ModFlags);
972 if (!IsTopLevel && (Parent != null))
973 return myAccess & Parent.EffectiveAccessLevel;
978 // Return the access level for type `t'
979 static AccessLevel TypeEffectiveAccessLevel (Type t)
982 return AccessLevel.Public;
983 if (t.IsNestedPrivate)
984 return AccessLevel.Private;
986 return AccessLevel.Internal;
988 // By now, it must be nested
989 AccessLevel parentLevel = TypeEffectiveAccessLevel (t.DeclaringType);
991 if (t.IsNestedPublic)
993 if (t.IsNestedAssembly)
994 return parentLevel & AccessLevel.Internal;
995 if (t.IsNestedFamily)
996 return parentLevel & AccessLevel.Protected;
997 if (t.IsNestedFamORAssem)
998 return parentLevel & AccessLevel.ProtectedOrInternal;
999 if (t.IsNestedFamANDAssem)
1000 throw new NotImplementedException ("NestedFamANDAssem not implemented, cant make this kind of type from c# anyways");
1002 // nested private is taken care of
1004 throw new Exception ("I give up, what are you?");
1008 // This answers `is the type P, as accessible as a member M which has the
1009 // accessability @flags which is declared as a nested member of the type T, this declspace'
1011 public bool AsAccessible (Type p, int flags)
1013 if (p.IsGenericParameter)
1014 return true; // FIXME
1017 // 1) if M is private, its accessability is the same as this declspace.
1018 // we already know that P is accessible to T before this method, so we
1022 if ((flags & Modifiers.PRIVATE) != 0)
1025 while (p.IsArray || p.IsPointer || p.IsByRef)
1026 p = TypeManager.GetElementType (p);
1028 AccessLevel pAccess = TypeEffectiveAccessLevel (p);
1029 AccessLevel mAccess = this.EffectiveAccessLevel &
1030 GetAccessLevelFromModifiers (flags);
1032 // for every place from which we can access M, we must
1033 // be able to access P as well. So, we want
1034 // For every bit in M and P, M_i -> P_1 == true
1035 // or, ~ (M -> P) == 0 <-> ~ ( ~M | P) == 0
1037 return ~ (~ mAccess | pAccess) == 0;
1040 static DoubleHash dh = new DoubleHash (1000);
1042 Type DefineTypeAndParents (DeclSpace tc)
1044 DeclSpace container = tc.Parent;
1046 if (container.TypeBuilder == null && container.Name != "")
1047 DefineTypeAndParents (container);
1049 return tc.DefineType ();
1052 Type LookupInterfaceOrClass (string ns, string name, out bool error)
1060 if (dh.Lookup (ns, name, out r))
1064 if (Namespace.IsNamespace (ns)){
1065 string fullname = (ns != "") ? ns + "." + name : name;
1066 t = TypeManager.LookupType (fullname);
1070 t = TypeManager.LookupType (name);
1074 dh.Insert (ns, name, t);
1079 // In case we are fed a composite name, normalize it.
1081 int p = name.LastIndexOf ('.');
1083 ns = MakeFQN (ns, name.Substring (0, p));
1084 name = name.Substring (p+1);
1087 parent = RootContext.Tree.LookupByNamespace (ns, name);
1088 if (parent == null) {
1089 dh.Insert (ns, name, null);
1093 t = DefineTypeAndParents (parent);
1099 dh.Insert (ns, name, t);
1103 public static void Error_AmbiguousTypeReference (Location loc, string name, string t1, string t2)
1105 Report.Error (104, loc,
1106 "`{0}' is an ambiguous reference ({1} or {2})",
1110 public Type FindNestedType (Location loc, string name,
1111 out DeclSpace containing_ds)
1116 containing_ds = this;
1117 while (containing_ds != null){
1118 Type container_type = containing_ds.TypeBuilder;
1119 Type current_type = container_type;
1121 while (current_type != null && current_type != TypeManager.object_type) {
1122 string pre = current_type.FullName;
1124 t = LookupInterfaceOrClass (pre, name, out error);
1128 if ((t != null) && containing_ds.CheckAccessLevel (t))
1131 current_type = current_type.BaseType;
1133 containing_ds = containing_ds.Parent;
1140 /// GetType is used to resolve type names at the DeclSpace level.
1141 /// Use this to lookup class/struct bases, interface bases or
1142 /// delegate type references
1146 /// Contrast this to LookupType which is used inside method bodies to
1147 /// lookup types that have already been defined. GetType is used
1148 /// during the tree resolution process and potentially define
1149 /// recursively the type
1151 public Type FindType (Location loc, string name)
1157 // For the case the type we are looking for is nested within this one
1158 // or is in any base class
1160 DeclSpace containing_ds = this;
1162 while (containing_ds != null){
1163 Type container_type = containing_ds.TypeBuilder;
1164 Type current_type = container_type;
1166 while (current_type != null && current_type != TypeManager.object_type) {
1167 string pre = current_type.FullName;
1169 t = LookupInterfaceOrClass (pre, name, out error);
1173 if ((t != null) && containing_ds.CheckAccessLevel (t))
1176 current_type = current_type.BaseType;
1178 containing_ds = containing_ds.Parent;
1182 // Attempt to lookup the class on our namespace and all it's implicit parents
1184 for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.ImplicitParent) {
1185 t = LookupInterfaceOrClass (ns.FullName, name, out error);
1194 // Attempt to do a direct unqualified lookup
1196 t = LookupInterfaceOrClass ("", name, out error);
1204 // Attempt to lookup the class on any of the `using'
1208 for (NamespaceEntry ns = NamespaceEntry; ns != null; ns = ns.Parent){
1210 t = LookupInterfaceOrClass (ns.FullName, name, out error);
1217 if (name.IndexOf ('.') > 0)
1220 IAlias alias_value = ns.LookupAlias (name);
1221 if (alias_value != null) {
1222 t = LookupInterfaceOrClass ("", alias_value.Name, out error);
1231 // Now check the using clause list
1234 foreach (Namespace using_ns in ns.GetUsingTable ()) {
1235 match = LookupInterfaceOrClass (using_ns.Name, name, out error);
1239 if (match != null) {
1241 if (CheckAccessLevel (match)) {
1242 Error_AmbiguousTypeReference (loc, name, t.FullName, match.FullName);
1255 //Report.Error (246, Location, "Can not find type `"+name+"'");
1260 /// This function is broken and not what you're looking for. It should only
1261 /// be used while the type is still being created since it doesn't use the cache
1262 /// and relies on the filter doing the member name check.
1264 public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
1265 MemberFilter filter, object criteria);
1268 /// If we have a MemberCache, return it. This property may return null if the
1269 /// class doesn't have a member cache or while it's still being created.
1271 public abstract MemberCache MemberCache {
1275 public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
1278 TypeBuilder.SetCustomAttribute (cb);
1279 } catch (System.ArgumentException e) {
1280 Report.Warning (-21, a.Location,
1281 "The CharSet named property on StructLayout\n"+
1282 "\tdoes not work correctly on Microsoft.NET\n"+
1283 "\tYou might want to remove the CharSet declaration\n"+
1284 "\tor compile using the Mono runtime instead of the\n"+
1285 "\tMicrosoft .NET runtime\n"+
1286 "\tThe runtime gave the error: " + e);
1291 /// Goes through class hierarchy and get value of first CLSCompliantAttribute that found.
1292 /// If no is attribute exists then return assembly CLSCompliantAttribute.
1294 public bool GetClsCompliantAttributeValue ()
1296 if ((caching_flags & Flags.HasCompliantAttribute_Undetected) == 0)
1297 return (caching_flags & Flags.ClsCompliantAttributeTrue) != 0;
1299 caching_flags &= ~Flags.HasCompliantAttribute_Undetected;
1301 if (OptAttributes != null) {
1302 EmitContext ec = new EmitContext (parent, this, Location,
1303 null, null, ModFlags, false);
1304 Attribute cls_attribute = OptAttributes.GetClsCompliantAttribute (ec);
1305 if (cls_attribute != null) {
1306 caching_flags |= Flags.HasClsCompliantAttribute;
1307 if (cls_attribute.GetClsCompliantAttributeValue (this)) {
1308 caching_flags |= Flags.ClsCompliantAttributeTrue;
1315 if (parent == null) {
1316 if (CodeGen.Assembly.IsClsCompliant) {
1317 caching_flags |= Flags.ClsCompliantAttributeTrue;
1323 if (parent.GetClsCompliantAttributeValue ()) {
1324 caching_flags |= Flags.ClsCompliantAttributeTrue;
1331 // Tests container name for CLS-Compliant name (differing only in case)
1332 // Possible optimalization: search in same namespace only
1333 protected override bool IsIdentifierClsCompliant (DeclSpace ds)
1335 int l = Name.Length;
1337 if (Namespace.LookupNamespace (NamespaceEntry.FullName, false) != null) {
1338 // Seek through all imported types
1339 foreach (string type_name in TypeManager.all_imported_types.Keys)
1341 if (l != type_name.Length)
1344 if (String.Compare (Name, type_name, true, CultureInfo.InvariantCulture) == 0 &&
1345 AttributeTester.IsClsCompliant (TypeManager.all_imported_types [type_name] as Type)) {
1346 Report.SymbolRelatedToPreviousError ((Type)TypeManager.all_imported_types [type_name]);
1352 // Seek through generated types
1353 foreach (string name in RootContext.Tree.Decls.Keys) {
1354 if (l != name.Length)
1357 if (String.Compare (Name, name, true, CultureInfo.InvariantCulture) == 0) {
1362 DeclSpace found_ds = RootContext.Tree.Decls[name] as DeclSpace;
1363 if (found_ds.IsClsCompliaceRequired (found_ds.Parent)) {
1364 Report.SymbolRelatedToPreviousError (found_ds.Location, found_ds.GetSignatureForError ());
1374 // Extensions for generics
1376 TypeParameter[] type_params;
1377 TypeParameter[] type_param_list;
1379 protected string GetInstantiationName ()
1381 StringBuilder sb = new StringBuilder (Name);
1383 for (int i = 0; i < type_param_list.Length; i++) {
1386 sb.Append (type_param_list [i].Name);
1389 return sb.ToString ();
1392 bool check_type_parameter (ArrayList list, int start, string name)
1394 for (int i = 0; i < start; i++) {
1395 TypeParameter param = (TypeParameter) list [i];
1397 if (param.Name != name)
1400 if (RootContext.WarningLevel >= 3)
1403 "Type parameter `{0}' has same name " +
1404 "as type parameter from outer type `{1}'",
1405 name, parent.GetInstantiationName ());
1413 TypeParameter[] initialize_type_params ()
1415 if (type_param_list != null)
1416 return type_param_list;
1418 DeclSpace the_parent = parent;
1419 if (this is GenericMethod)
1423 TypeParameter[] parent_params = null;
1424 if ((the_parent != null) && the_parent.IsGeneric) {
1425 parent_params = the_parent.initialize_type_params ();
1426 start = parent_params != null ? parent_params.Length : 0;
1429 ArrayList list = new ArrayList ();
1430 if (parent_params != null)
1431 list.AddRange (parent_params);
1433 int count = type_params != null ? type_params.Length : 0;
1434 for (int i = 0; i < count; i++) {
1435 TypeParameter param = type_params [i];
1436 check_type_parameter (list, start, param.Name);
1440 type_param_list = new TypeParameter [list.Count];
1441 list.CopyTo (type_param_list, 0);
1442 return type_param_list;
1445 public AdditionResult SetParameterInfo (ArrayList constraints_list)
1448 if (constraints_list != null) {
1450 80, Location, "Contraints are not allowed " +
1451 "on non-generic declarations");
1452 return AdditionResult.Error;
1455 return AdditionResult.Success;
1458 string[] names = MemberName.TypeArguments.GetDeclarations ();
1459 type_params = new TypeParameter [names.Length];
1462 // Register all the names
1464 for (int i = 0; i < type_params.Length; i++) {
1465 string name = names [i];
1467 AdditionResult res = IsValid (name, name);
1469 if (res != AdditionResult.Success)
1472 Constraints constraints = null;
1473 if (constraints_list != null) {
1474 foreach (Constraints constraint in constraints_list) {
1475 if (constraint.TypeParameter == name) {
1476 constraints = constraint;
1482 type_params [i] = new TypeParameter (name, constraints, Location);
1484 DefineName (name, type_params [i]);
1487 return AdditionResult.Success;
1490 public TypeParameter[] TypeParameters {
1493 throw new InvalidOperationException ();
1494 if (type_param_list == null)
1495 initialize_type_params ();
1497 return type_param_list;
1501 protected TypeParameter[] CurrentTypeParameters {
1504 throw new InvalidOperationException ();
1505 if (type_params != null)
1508 return new TypeParameter [0];
1512 public int CountTypeParameters {
1514 return count_type_params;
1518 public TypeParameterExpr LookupGeneric (string name, Location loc)
1523 foreach (TypeParameter type_param in CurrentTypeParameters) {
1524 if (type_param.Name != name)
1527 return new TypeParameterExpr (type_param, loc);
1531 return parent.LookupGeneric (name, loc);
1536 bool IAlias.IsType {
1537 get { return true; }
1540 string IAlias.Name {
1541 get { return Name; }
1544 TypeExpr IAlias.Type
1547 if (TypeBuilder == null)
1548 throw new InvalidOperationException ();
1550 if (CurrentType != null)
1553 return new TypeExpression (TypeBuilder, Location);
1557 protected override string[] ValidAttributeTargets {
1559 return attribute_targets;
1565 /// This is a readonly list of MemberInfo's.
1567 public class MemberList : IList {
1568 public readonly IList List;
1572 /// Create a new MemberList from the given IList.
1574 public MemberList (IList list)
1579 this.List = new ArrayList ();
1584 /// Concatenate the ILists `first' and `second' to a new MemberList.
1586 public MemberList (IList first, IList second)
1588 ArrayList list = new ArrayList ();
1589 list.AddRange (first);
1590 list.AddRange (second);
1595 public static readonly MemberList Empty = new MemberList (new ArrayList ());
1598 /// Cast the MemberList into a MemberInfo[] array.
1601 /// This is an expensive operation, only use it if it's really necessary.
1603 public static explicit operator MemberInfo [] (MemberList list)
1605 Timer.StartTimer (TimerType.MiscTimer);
1606 MemberInfo [] result = new MemberInfo [list.Count];
1607 list.CopyTo (result, 0);
1608 Timer.StopTimer (TimerType.MiscTimer);
1620 public bool IsSynchronized {
1622 return List.IsSynchronized;
1626 public object SyncRoot {
1628 return List.SyncRoot;
1632 public void CopyTo (Array array, int index)
1634 List.CopyTo (array, index);
1639 public IEnumerator GetEnumerator ()
1641 return List.GetEnumerator ();
1646 public bool IsFixedSize {
1652 public bool IsReadOnly {
1658 object IList.this [int index] {
1660 return List [index];
1664 throw new NotSupportedException ();
1668 // FIXME: try to find out whether we can avoid the cast in this indexer.
1669 public MemberInfo this [int index] {
1671 return (MemberInfo) List [index];
1675 public int Add (object value)
1677 throw new NotSupportedException ();
1680 public void Clear ()
1682 throw new NotSupportedException ();
1685 public bool Contains (object value)
1687 return List.Contains (value);
1690 public int IndexOf (object value)
1692 return List.IndexOf (value);
1695 public void Insert (int index, object value)
1697 throw new NotSupportedException ();
1700 public void Remove (object value)
1702 throw new NotSupportedException ();
1705 public void RemoveAt (int index)
1707 throw new NotSupportedException ();
1712 /// This interface is used to get all members of a class when creating the
1713 /// member cache. It must be implemented by all DeclSpace derivatives which
1714 /// want to support the member cache and by TypeHandle to get caching of
1715 /// non-dynamic types.
1717 public interface IMemberContainer {
1719 /// The name of the IMemberContainer. This is only used for
1720 /// debugging purposes.
1727 /// The type of this IMemberContainer.
1734 /// Returns the IMemberContainer of the parent class or null if this
1735 /// is an interface or TypeManger.object_type.
1736 /// This is used when creating the member cache for a class to get all
1737 /// members from the parent class.
1739 IMemberContainer Parent {
1744 /// Whether this is an interface.
1751 /// Returns all members of this class with the corresponding MemberTypes
1752 /// and BindingFlags.
1755 /// When implementing this method, make sure not to return any inherited
1756 /// members and check the MemberTypes and BindingFlags properly.
1757 /// Unfortunately, System.Reflection is lame and doesn't provide a way to
1758 /// get the BindingFlags (static/non-static,public/non-public) in the
1759 /// MemberInfo class, but the cache needs this information. That's why
1760 /// this method is called multiple times with different BindingFlags.
1762 MemberList GetMembers (MemberTypes mt, BindingFlags bf);
1765 /// Return the container's member cache.
1767 MemberCache MemberCache {
1773 /// The MemberCache is used by dynamic and non-dynamic types to speed up
1774 /// member lookups. It has a member name based hash table; it maps each member
1775 /// name to a list of CacheEntry objects. Each CacheEntry contains a MemberInfo
1776 /// and the BindingFlags that were initially used to get it. The cache contains
1777 /// all members of the current class and all inherited members. If this cache is
1778 /// for an interface types, it also contains all inherited members.
1780 /// There are two ways to get a MemberCache:
1781 /// * if this is a dynamic type, lookup the corresponding DeclSpace and then
1782 /// use the DeclSpace.MemberCache property.
1783 /// * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
1784 /// TypeHandle instance for the type and then use TypeHandle.MemberCache.
1786 public class MemberCache {
1787 public readonly IMemberContainer Container;
1788 protected Hashtable member_hash;
1789 protected Hashtable method_hash;
1792 /// Create a new MemberCache for the given IMemberContainer `container'.
1794 public MemberCache (IMemberContainer container)
1796 this.Container = container;
1798 Timer.IncrementCounter (CounterType.MemberCache);
1799 Timer.StartTimer (TimerType.CacheInit);
1803 // If we have a parent class (we have a parent class unless we're
1804 // TypeManager.object_type), we deep-copy its MemberCache here.
1805 if (Container.IsInterface) {
1808 if (Container.Parent != null)
1809 parent = Container.Parent.MemberCache;
1811 parent = TypeHandle.ObjectType.MemberCache;
1812 member_hash = SetupCacheForInterface (parent);
1813 } else if (Container.Parent != null)
1814 member_hash = SetupCache (Container.Parent.MemberCache);
1816 member_hash = new Hashtable ();
1818 // If this is neither a dynamic type nor an interface, create a special
1819 // method cache with all declared and inherited methods.
1820 Type type = container.Type;
1821 if (!(type is TypeBuilder) && !type.IsInterface && !type.IsGenericParameter) {
1822 method_hash = new Hashtable ();
1826 // Add all members from the current class.
1827 AddMembers (Container);
1829 Timer.StopTimer (TimerType.CacheInit);
1833 /// Bootstrap this member cache by doing a deep-copy of our parent.
1835 Hashtable SetupCache (MemberCache parent)
1837 Hashtable hash = new Hashtable ();
1839 IDictionaryEnumerator it = parent.member_hash.GetEnumerator ();
1840 while (it.MoveNext ()) {
1841 hash [it.Key] = ((ArrayList) it.Value).Clone ();
1849 /// Add the contents of `new_hash' to `hash'.
1851 void AddHashtable (Hashtable hash, MemberCache cache)
1853 Hashtable new_hash = cache.member_hash;
1854 IDictionaryEnumerator it = new_hash.GetEnumerator ();
1855 while (it.MoveNext ()) {
1856 ArrayList list = (ArrayList) hash [it.Key];
1858 hash [it.Key] = list = new ArrayList ();
1860 foreach (CacheEntry entry in (ArrayList) it.Value) {
1861 if (entry.Container != cache.Container)
1869 /// Bootstrap the member cache for an interface type.
1870 /// Type.GetMembers() won't return any inherited members for interface types,
1871 /// so we need to do this manually. Interfaces also inherit from System.Object.
1873 Hashtable SetupCacheForInterface (MemberCache parent)
1875 Hashtable hash = SetupCache (parent);
1876 TypeExpr [] ifaces = TypeManager.GetInterfaces (Container.Type);
1878 foreach (TypeExpr iface in ifaces) {
1879 Type itype = iface.Type;
1881 IMemberContainer iface_container =
1882 TypeManager.LookupMemberContainer (itype);
1884 MemberCache iface_cache = iface_container.MemberCache;
1886 AddHashtable (hash, iface_cache);
1893 /// Add all members from class `container' to the cache.
1895 void AddMembers (IMemberContainer container)
1897 // We need to call AddMembers() with a single member type at a time
1898 // to get the member type part of CacheEntry.EntryType right.
1899 AddMembers (MemberTypes.Constructor, container);
1900 AddMembers (MemberTypes.Field, container);
1901 AddMembers (MemberTypes.Method, container);
1902 AddMembers (MemberTypes.Property, container);
1903 AddMembers (MemberTypes.Event, container);
1904 // Nested types are returned by both Static and Instance searches.
1905 AddMembers (MemberTypes.NestedType,
1906 BindingFlags.Static | BindingFlags.Public, container);
1907 AddMembers (MemberTypes.NestedType,
1908 BindingFlags.Static | BindingFlags.NonPublic, container);
1911 void AddMembers (MemberTypes mt, IMemberContainer container)
1913 AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
1914 AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
1915 AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
1916 AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
1920 /// Add all members from class `container' with the requested MemberTypes and
1921 /// BindingFlags to the cache. This method is called multiple times with different
1922 /// MemberTypes and BindingFlags.
1924 void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
1926 MemberList members = container.GetMembers (mt, bf);
1928 foreach (MemberInfo member in members) {
1929 string name = member.Name;
1931 int pos = name.IndexOf ('<');
1933 name = name.Substring (0, pos);
1935 // We use a name-based hash table of ArrayList's.
1936 ArrayList list = (ArrayList) member_hash [name];
1938 list = new ArrayList ();
1939 member_hash.Add (name, list);
1942 // When this method is called for the current class, the list will
1943 // already contain all inherited members from our parent classes.
1944 // We cannot add new members in front of the list since this'd be an
1945 // expensive operation, that's why the list is sorted in reverse order
1946 // (ie. members from the current class are coming last).
1947 list.Add (new CacheEntry (container, member, mt, bf));
1952 /// Add all declared and inherited methods from class `type' to the method cache.
1954 void AddMethods (Type type)
1956 AddMethods (BindingFlags.Static | BindingFlags.Public |
1957 BindingFlags.FlattenHierarchy, type);
1958 AddMethods (BindingFlags.Static | BindingFlags.NonPublic |
1959 BindingFlags.FlattenHierarchy, type);
1960 AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
1961 AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
1964 void AddMethods (BindingFlags bf, Type type)
1966 MemberInfo [] members = type.GetMethods (bf);
1968 Array.Reverse (members);
1970 foreach (MethodBase member in members) {
1971 string name = member.Name;
1973 // We use a name-based hash table of ArrayList's.
1974 ArrayList list = (ArrayList) method_hash [name];
1976 list = new ArrayList ();
1977 method_hash.Add (name, list);
1980 // Unfortunately, the elements returned by Type.GetMethods() aren't
1981 // sorted so we need to do this check for every member.
1982 BindingFlags new_bf = bf;
1983 if (member.DeclaringType == type)
1984 new_bf |= BindingFlags.DeclaredOnly;
1986 list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
1991 /// Compute and return a appropriate `EntryType' magic number for the given
1992 /// MemberTypes and BindingFlags.
1994 protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
1996 EntryType type = EntryType.None;
1998 if ((mt & MemberTypes.Constructor) != 0)
1999 type |= EntryType.Constructor;
2000 if ((mt & MemberTypes.Event) != 0)
2001 type |= EntryType.Event;
2002 if ((mt & MemberTypes.Field) != 0)
2003 type |= EntryType.Field;
2004 if ((mt & MemberTypes.Method) != 0)
2005 type |= EntryType.Method;
2006 if ((mt & MemberTypes.Property) != 0)
2007 type |= EntryType.Property;
2008 // Nested types are returned by static and instance searches.
2009 if ((mt & MemberTypes.NestedType) != 0)
2010 type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;
2012 if ((bf & BindingFlags.Instance) != 0)
2013 type |= EntryType.Instance;
2014 if ((bf & BindingFlags.Static) != 0)
2015 type |= EntryType.Static;
2016 if ((bf & BindingFlags.Public) != 0)
2017 type |= EntryType.Public;
2018 if ((bf & BindingFlags.NonPublic) != 0)
2019 type |= EntryType.NonPublic;
2020 if ((bf & BindingFlags.DeclaredOnly) != 0)
2021 type |= EntryType.Declared;
2027 /// The `MemberTypes' enumeration type is a [Flags] type which means that it may
2028 /// denote multiple member types. Returns true if the given flags value denotes a
2029 /// single member types.
2031 public static bool IsSingleMemberType (MemberTypes mt)
2034 case MemberTypes.Constructor:
2035 case MemberTypes.Event:
2036 case MemberTypes.Field:
2037 case MemberTypes.Method:
2038 case MemberTypes.Property:
2039 case MemberTypes.NestedType:
2048 /// We encode the MemberTypes and BindingFlags of each members in a "magic"
2049 /// number to speed up the searching process.
2052 protected enum EntryType {
2057 MaskStatic = Instance|Static,
2061 MaskProtection = Public|NonPublic,
2065 Constructor = 0x020,
2072 MaskType = Constructor|Event|Field|Method|Property|NestedType
2075 protected struct CacheEntry {
2076 public readonly IMemberContainer Container;
2077 public readonly EntryType EntryType;
2078 public readonly MemberInfo Member;
2080 public CacheEntry (IMemberContainer container, MemberInfo member,
2081 MemberTypes mt, BindingFlags bf)
2083 this.Container = container;
2084 this.Member = member;
2085 this.EntryType = GetEntryType (mt, bf);
2090 /// This is called each time we're walking up one level in the class hierarchy
2091 /// and checks whether we can abort the search since we've already found what
2092 /// we were looking for.
2094 protected bool DoneSearching (ArrayList list)
2097 // We've found exactly one member in the current class and it's not
2098 // a method or constructor.
2100 if (list.Count == 1 && !(list [0] is MethodBase))
2104 // Multiple properties: we query those just to find out the indexer
2107 if ((list.Count > 0) && (list [0] is PropertyInfo))
2114 /// Looks up members with name `name'. If you provide an optional
2115 /// filter function, it'll only be called with members matching the
2116 /// requested member name.
2118 /// This method will try to use the cache to do the lookup if possible.
2120 /// Unlike other FindMembers implementations, this method will always
2121 /// check all inherited members - even when called on an interface type.
2123 /// If you know that you're only looking for methods, you should use
2124 /// MemberTypes.Method alone since this speeds up the lookup a bit.
2125 /// When doing a method-only search, it'll try to use a special method
2126 /// cache (unless it's a dynamic type or an interface) and the returned
2127 /// MemberInfo's will have the correct ReflectedType for inherited methods.
2128 /// The lookup process will automatically restart itself in method-only
2129 /// search mode if it discovers that it's about to return methods.
2131 ArrayList global = new ArrayList ();
2132 bool using_global = false;
2134 static MemberInfo [] emptyMemberInfo = new MemberInfo [0];
2136 public MemberInfo [] FindMembers (MemberTypes mt, BindingFlags bf, string name,
2137 MemberFilter filter, object criteria)
2140 throw new Exception ();
2142 bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
2143 bool method_search = mt == MemberTypes.Method;
2144 // If we have a method cache and we aren't already doing a method-only search,
2145 // then we restart a method search if the first match is a method.
2146 bool do_method_search = !method_search && (method_hash != null);
2148 ArrayList applicable;
2150 // If this is a method-only search, we try to use the method cache if
2151 // possible; a lookup in the method cache will return a MemberInfo with
2152 // the correct ReflectedType for inherited methods.
2154 if (method_search && (method_hash != null))
2155 applicable = (ArrayList) method_hash [name];
2157 applicable = (ArrayList) member_hash [name];
2159 if (applicable == null)
2160 return emptyMemberInfo;
2163 // 32 slots gives 53 rss/54 size
2164 // 2/4 slots gives 55 rss
2166 // Strange: from 25,000 calls, only 1,800
2167 // are above 2. Why does this impact it?
2170 using_global = true;
2172 Timer.StartTimer (TimerType.CachedLookup);
2174 EntryType type = GetEntryType (mt, bf);
2176 IMemberContainer current = Container;
2179 // `applicable' is a list of all members with the given member name `name'
2180 // in the current class and all its parent classes. The list is sorted in
2181 // reverse order due to the way how the cache is initialy created (to speed
2182 // things up, we're doing a deep-copy of our parent).
2184 for (int i = applicable.Count-1; i >= 0; i--) {
2185 CacheEntry entry = (CacheEntry) applicable [i];
2187 // This happens each time we're walking one level up in the class
2188 // hierarchy. If we're doing a DeclaredOnly search, we must abort
2189 // the first time this happens (this may already happen in the first
2190 // iteration of this loop if there are no members with the name we're
2191 // looking for in the current class).
2192 if (entry.Container != current) {
2193 if (declared_only || DoneSearching (global))
2196 current = entry.Container;
2199 // Is the member of the correct type ?
2200 if ((entry.EntryType & type & EntryType.MaskType) == 0)
2203 // Is the member static/non-static ?
2204 if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
2207 // Apply the filter to it.
2208 if (filter (entry.Member, criteria)) {
2209 if ((entry.EntryType & EntryType.MaskType) != EntryType.Method)
2210 do_method_search = false;
2211 global.Add (entry.Member);
2215 Timer.StopTimer (TimerType.CachedLookup);
2217 // If we have a method cache and we aren't already doing a method-only
2218 // search, we restart in method-only search mode if the first match is
2219 // a method. This ensures that we return a MemberInfo with the correct
2220 // ReflectedType for inherited methods.
2221 if (do_method_search && (global.Count > 0)){
2222 using_global = false;
2224 return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
2227 using_global = false;
2228 MemberInfo [] copy = new MemberInfo [global.Count];
2229 global.CopyTo (copy);
2234 // This finds the method or property for us to override. invocationType is the type where
2235 // the override is going to be declared, name is the name of the method/property, and
2236 // paramTypes is the parameters, if any to the method or property
2238 // Because the MemberCache holds members from this class and all the base classes,
2239 // we can avoid tons of reflection stuff.
2241 public MemberInfo FindMemberToOverride (Type invocationType, string name, Type [] paramTypes, bool is_property)
2243 ArrayList applicable;
2244 if (method_hash != null && !is_property)
2245 applicable = (ArrayList) method_hash [name];
2247 applicable = (ArrayList) member_hash [name];
2249 if (applicable == null)
2252 // Walk the chain of methods, starting from the top.
2254 for (int i = applicable.Count - 1; i >= 0; i--) {
2255 CacheEntry entry = (CacheEntry) applicable [i];
2257 if ((entry.EntryType & (is_property ? (EntryType.Property | EntryType.Field) : EntryType.Method)) == 0)
2260 PropertyInfo pi = null;
2261 MethodInfo mi = null;
2262 FieldInfo fi = null;
2263 Type [] cmpAttrs = null;
2266 if ((entry.EntryType & EntryType.Field) != 0) {
2267 fi = (FieldInfo)entry.Member;
2269 // TODO: For this case we ignore member type
2270 //fb = TypeManager.GetField (fi);
2271 //cmpAttrs = new Type[] { fb.MemberType };
2273 pi = (PropertyInfo) entry.Member;
2274 cmpAttrs = TypeManager.GetArgumentTypes (pi);
2277 mi = (MethodInfo) entry.Member;
2278 cmpAttrs = TypeManager.GetArgumentTypes (mi);
2282 // TODO: Almost duplicate !
2284 switch (fi.Attributes & FieldAttributes.FieldAccessMask) {
2285 case FieldAttributes.Private:
2287 // A private method is Ok if we are a nested subtype.
2288 // The spec actually is not very clear about this, see bug 52458.
2290 if (invocationType != entry.Container.Type &
2291 TypeManager.IsNestedChildOf (invocationType, entry.Container.Type))
2295 case FieldAttributes.FamANDAssem:
2296 case FieldAttributes.Assembly:
2298 // Check for assembly methods
2300 if (mi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
2304 return entry.Member;
2308 // Check the arguments
2310 if (cmpAttrs.Length != paramTypes.Length)
2313 for (int j = cmpAttrs.Length - 1; j >= 0; j --) {
2314 if (!paramTypes [j].Equals (cmpAttrs [j]))
2319 // get one of the methods because this has the visibility info.
2322 mi = pi.GetGetMethod (true);
2324 mi = pi.GetSetMethod (true);
2330 switch (mi.Attributes & MethodAttributes.MemberAccessMask) {
2331 case MethodAttributes.Private:
2333 // A private method is Ok if we are a nested subtype.
2334 // The spec actually is not very clear about this, see bug 52458.
2336 if (invocationType == entry.Container.Type ||
2337 TypeManager.IsNestedChildOf (invocationType, entry.Container.Type))
2338 return entry.Member;
2341 case MethodAttributes.FamANDAssem:
2342 case MethodAttributes.Assembly:
2344 // Check for assembly methods
2346 if (mi.DeclaringType.Assembly == CodeGen.Assembly.Builder)
2347 return entry.Member;
2352 // A protected method is ok, because we are overriding.
2353 // public is always ok.
2355 return entry.Member;