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)
10 // (C) 2004 Novell, Inc
12 // TODO: Move the method verification stuff from the class.cs and interface.cs here
17 using System.Collections;
18 using System.Globalization;
19 using System.Reflection.Emit;
20 using System.Reflection;
22 #if BOOTSTRAP_WITH_OLDLIB
23 using XmlElement = System.Object;
28 namespace Mono.CSharp {
30 public class MemberName {
31 public readonly string Name;
32 public readonly TypeArguments TypeArguments;
34 public readonly MemberName Left;
35 public readonly Location Location;
37 public static readonly MemberName Null = new MemberName ("");
41 private MemberName (MemberName left, string name, bool is_double_colon,
46 this.is_double_colon = is_double_colon;
50 private MemberName (MemberName left, string name, bool is_double_colon,
51 TypeArguments args, Location loc)
52 : this (left, name, is_double_colon, loc)
54 this.TypeArguments = args;
57 public MemberName (string name)
58 : this (name, Location.Null)
61 public MemberName (string name, Location loc)
62 : this (null, name, false, loc)
65 public MemberName (string name, TypeArguments args, Location loc)
66 : this (null, name, false, args, loc)
69 public MemberName (MemberName left, string name)
70 : this (left, name, left != null ? left.Location : Location.Null)
73 public MemberName (MemberName left, string name, Location loc)
74 : this (left, name, false, loc)
77 public MemberName (MemberName left, string name, TypeArguments args, Location loc)
78 : this (left, name, false, args, loc)
81 public MemberName (string alias, string name, Location loc)
82 : this (new MemberName (alias, loc), name, true, loc)
85 public MemberName (MemberName left, MemberName right)
86 : this (left, right, right.Location)
89 public MemberName (MemberName left, MemberName right, Location loc)
90 : this (null, right.Name, false, right.TypeArguments, loc)
92 if (right.is_double_colon)
93 throw new InternalErrorException ("Cannot append double_colon member name");
94 this.Left = (right.Left == null) ? left : new MemberName (left, right.Left);
97 public string GetName ()
99 return GetName (false);
102 public bool IsGeneric {
104 if (TypeArguments != null)
106 else if (Left != null)
107 return Left.IsGeneric;
113 public string GetName (bool is_generic)
115 string name = is_generic ? Basename : Name;
116 string connect = is_double_colon ? "::" : ".";
118 return Left.GetName (is_generic) + connect + name;
123 public string GetTypeName ()
125 string connect = is_double_colon ? "::" : ".";
127 return Left.GetTypeName () + connect + MakeName (Name, TypeArguments);
129 return MakeName (Name, TypeArguments);
132 public Expression GetTypeExpression ()
136 if (!CheckUnbound (Location))
139 return new UnboundTypeExpression (this, Location);
144 if (TypeArguments != null)
145 return new SimpleName (Basename, TypeArguments, Location);
147 return new SimpleName (Name, Location);
150 if (is_double_colon) {
151 if (Left.Left != null)
152 throw new InternalErrorException ("The left side of a :: should be an identifier");
153 return new QualifiedAliasMember (Left.Name, Name, Location);
156 Expression lexpr = Left.GetTypeExpression ();
157 return new MemberAccess (lexpr, Name, TypeArguments, Location);
160 public MemberName Clone ()
162 MemberName left_clone = Left == null ? null : Left.Clone ();
163 return new MemberName (left_clone, Name, is_double_colon, TypeArguments, Location);
166 public string Basename {
168 if (TypeArguments != null)
169 return MakeName (Name, TypeArguments);
175 public string FullName {
177 if (TypeArguments != null)
178 return Name + "<" + TypeArguments + ">";
184 public string MethodName {
186 string connect = is_double_colon ? "::" : ".";
188 return Left.FullName + connect + Name;
194 public override string ToString ()
196 string connect = is_double_colon ? "::" : ".";
198 return Left.FullName + connect + FullName;
203 public override bool Equals (object other)
205 return Equals (other as MemberName);
208 public bool Equals (MemberName other)
212 if (other == null || Name != other.Name)
214 if (is_double_colon != other.is_double_colon)
217 if ((TypeArguments != null) &&
218 (other.TypeArguments == null || TypeArguments.Count != other.TypeArguments.Count))
221 if ((TypeArguments == null) && (other.TypeArguments != null))
225 return other.Left == null;
227 return Left.Equals (other.Left);
230 public override int GetHashCode ()
232 int hash = Name.GetHashCode ();
233 for (MemberName n = Left; n != null; n = n.Left)
234 hash ^= n.Name.GetHashCode ();
238 if (TypeArguments != null)
239 hash ^= TypeArguments.Count << 5;
241 return hash & 0x7FFFFFFF;
244 public int CountTypeArguments {
246 if (TypeArguments == null)
249 return TypeArguments.Count;
253 public static string MakeName (string name, TypeArguments args)
258 return name + "`" + args.Count;
261 public static string MakeName (string name, int count)
263 return name + "`" + count;
266 protected bool IsUnbound {
268 if ((Left != null) && Left.IsUnbound)
270 else if (TypeArguments == null)
273 return TypeArguments.IsUnbound;
277 protected bool CheckUnbound (Location loc)
279 if ((Left != null) && !Left.CheckUnbound (loc))
281 if ((TypeArguments != null) && !TypeArguments.IsUnbound) {
282 Report.Error (1031, loc, "Type expected");
291 /// Base representation for members. This is used to keep track
292 /// of Name, Location and Modifier flags, and handling Attributes.
294 public abstract class MemberCore : Attributable, IResolveContext {
299 protected string cached_name;
302 if (cached_name == null)
303 cached_name = MemberName.GetName (!(this is GenericMethod) && !(this is Method));
308 // Is not readonly because of IndexerName attribute
309 private MemberName member_name;
310 public MemberName MemberName {
311 get { return member_name; }
315 /// Modifier flags that the user specified in the source code
319 public readonly DeclSpace Parent;
322 /// Location where this declaration happens
324 public Location Location {
325 get { return member_name.Location; }
329 /// XML documentation comment
331 protected string comment;
334 /// Represents header string for documentation comment
335 /// for each member types.
337 public abstract string DocCommentHeader { get; }
341 Obsolete_Undetected = 1, // Obsolete attribute has not been detected yet
342 Obsolete = 1 << 1, // Type has obsolete attribute
343 ClsCompliance_Undetected = 1 << 2, // CLS Compliance has not been detected yet
344 ClsCompliant = 1 << 3, // Type is CLS Compliant
345 CloseTypeCreated = 1 << 4, // Tracks whether we have Closed the type
346 HasCompliantAttribute_Undetected = 1 << 5, // Presence of CLSCompliantAttribute has not been detected
347 HasClsCompliantAttribute = 1 << 6, // Type has CLSCompliantAttribute
348 ClsCompliantAttributeTrue = 1 << 7, // Type has CLSCompliant (true)
349 Excluded_Undetected = 1 << 8, // Conditional attribute has not been detected yet
350 Excluded = 1 << 9, // Method is conditional
351 TestMethodDuplication = 1 << 10, // Test for duplication must be performed
353 IsAssigned = 1 << 12, // Field is assigned
354 HasExplicitLayout = 1 << 13
358 /// MemberCore flags at first detected then cached
360 internal Flags caching_flags;
362 public MemberCore (DeclSpace parent, MemberName name, Attributes attrs)
365 this.Parent = parent;
367 caching_flags = Flags.Obsolete_Undetected | Flags.ClsCompliance_Undetected | Flags.HasCompliantAttribute_Undetected | Flags.Excluded_Undetected;
370 protected virtual void SetMemberName (MemberName new_name)
372 member_name = new_name;
376 public abstract bool Define ();
378 public virtual string DocComment {
388 // Returns full member name for error message
390 public virtual string GetSignatureForError ()
392 if (Parent == null || Parent.Parent == null)
393 return member_name.ToString ();
395 return String.Concat (Parent.GetSignatureForError (), '.', member_name.ToString ());
399 /// Base Emit method. This is also entry point for CLS-Compliant verification.
401 public virtual void Emit ()
403 if (!RootContext.VerifyClsCompliance)
406 VerifyClsCompliance ();
409 public virtual bool IsUsed {
410 get { return (caching_flags & Flags.IsUsed) != 0; }
413 public void SetMemberIsUsed ()
415 caching_flags |= Flags.IsUsed;
419 /// Returns instance of ObsoleteAttribute for this MemberCore
421 public virtual ObsoleteAttribute GetObsoleteAttribute ()
423 // ((flags & (Flags.Obsolete_Undetected | Flags.Obsolete)) == 0) is slower, but why ?
424 if ((caching_flags & Flags.Obsolete_Undetected) == 0 && (caching_flags & Flags.Obsolete) == 0) {
428 caching_flags &= ~Flags.Obsolete_Undetected;
430 if (OptAttributes == null)
433 Attribute obsolete_attr = OptAttributes.Search (
434 TypeManager.obsolete_attribute_type);
435 if (obsolete_attr == null)
438 ObsoleteAttribute obsolete = obsolete_attr.GetObsoleteAttribute ();
439 if (obsolete == null)
442 caching_flags |= Flags.Obsolete;
447 /// Checks for ObsoleteAttribute presence. It's used for testing of all non-types elements
449 public virtual void CheckObsoleteness (Location loc)
452 Parent.CheckObsoleteness (loc);
454 ObsoleteAttribute oa = GetObsoleteAttribute ();
459 AttributeTester.Report_ObsoleteMessage (oa, GetSignatureForError (), loc);
463 /// Analyze whether CLS-Compliant verification must be execute for this MemberCore.
465 public override bool IsClsComplianceRequired ()
467 if ((caching_flags & Flags.ClsCompliance_Undetected) == 0)
468 return (caching_flags & Flags.ClsCompliant) != 0;
470 if (GetClsCompliantAttributeValue () && IsExposedFromAssembly ()) {
471 caching_flags &= ~Flags.ClsCompliance_Undetected;
472 caching_flags |= Flags.ClsCompliant;
476 caching_flags &= ~Flags.ClsCompliance_Undetected;
481 /// Returns true when MemberCore is exposed from assembly.
483 public bool IsExposedFromAssembly ()
485 if ((ModFlags & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
488 DeclSpace parentContainer = Parent;
489 while (parentContainer != null && parentContainer.ModFlags != 0) {
490 if ((parentContainer.ModFlags & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
492 parentContainer = parentContainer.Parent;
498 /// Goes through class hierarchy and gets value of first found CLSCompliantAttribute.
499 /// If no is attribute exists then assembly CLSCompliantAttribute is returned.
501 public virtual bool GetClsCompliantAttributeValue ()
503 if ((caching_flags & Flags.HasCompliantAttribute_Undetected) == 0)
504 return (caching_flags & Flags.ClsCompliantAttributeTrue) != 0;
506 caching_flags &= ~Flags.HasCompliantAttribute_Undetected;
508 if (OptAttributes != null) {
509 Attribute cls_attribute = OptAttributes.Search (
510 TypeManager.cls_compliant_attribute_type);
511 if (cls_attribute != null) {
512 caching_flags |= Flags.HasClsCompliantAttribute;
513 bool value = cls_attribute.GetClsCompliantAttributeValue ();
515 caching_flags |= Flags.ClsCompliantAttributeTrue;
520 if (Parent.GetClsCompliantAttributeValue ()) {
521 caching_flags |= Flags.ClsCompliantAttributeTrue;
528 /// Returns true if MemberCore is explicitly marked with CLSCompliantAttribute
530 protected bool HasClsCompliantAttribute {
532 return (caching_flags & Flags.HasClsCompliantAttribute) != 0;
537 /// It helps to handle error 102 & 111 detection
539 public virtual bool MarkForDuplicationCheck ()
545 /// The main virtual method for CLS-Compliant verifications.
546 /// The method returns true if member is CLS-Compliant and false if member is not
547 /// CLS-Compliant which means that CLS-Compliant tests are not necessary. A descendants override it
548 /// and add their extra verifications.
550 protected virtual bool VerifyClsCompliance ()
552 if (!IsClsComplianceRequired ()) {
553 if (HasClsCompliantAttribute && RootContext.WarningLevel >= 2) {
554 if (!IsExposedFromAssembly ())
555 Report.Warning (3019, 2, Location, "CLS compliance checking will not be performed on `{0}' because it is not visible from outside this assembly", GetSignatureForError ());
556 if (!CodeGen.Assembly.IsClsCompliant)
557 Report.Warning (3021, 2, Location, "`{0}' does not need a CLSCompliant attribute because the assembly is not marked as CLS-compliant", GetSignatureForError ());
562 if (!CodeGen.Assembly.IsClsCompliant) {
563 if (HasClsCompliantAttribute) {
564 Report.Error (3014, Location,
565 "`{0}' cannot be marked as CLS-compliant because the assembly is not marked as CLS-compliant",
566 GetSignatureForError ());
571 if (member_name.Name [0] == '_') {
572 Report.Error (3008, Location, "Identifier `{0}' is not CLS-compliant", GetSignatureForError () );
578 // Raised (and passed an XmlElement that contains the comment)
579 // when GenerateDocComment is writing documentation expectedly.
581 internal virtual void OnGenerateDocComment (XmlElement intermediateNode)
586 // Returns a string that represents the signature for this
587 // member which should be used in XML documentation.
589 public virtual string GetDocCommentName (DeclSpace ds)
591 if (ds == null || this is DeclSpace)
592 return DocCommentHeader + Name;
594 return String.Concat (DocCommentHeader, ds.Name, ".", Name);
598 // Generates xml doc comments (if any), and if required,
599 // handle warning report.
601 internal virtual void GenerateDocComment (DeclSpace ds)
603 DocUtil.GenerateDocComment (this, ds);
606 public override IResolveContext ResolveContext {
610 #region IResolveContext Members
612 public DeclSpace DeclContainer {
613 get { return Parent; }
616 public virtual DeclSpace GenericDeclContainer {
617 get { return DeclContainer; }
620 public bool IsInObsoleteScope {
622 if (GetObsoleteAttribute () != null)
625 return Parent == null ? false : Parent.IsInObsoleteScope;
629 public bool IsInUnsafeScope {
631 if ((ModFlags & Modifiers.UNSAFE) != 0)
634 return Parent == null ? false : Parent.IsInUnsafeScope;
642 /// Base class for structs, classes, enumerations and interfaces.
645 /// They all create new declaration spaces. This
646 /// provides the common foundation for managing those name
649 public abstract class DeclSpace : MemberCore {
651 /// This points to the actual definition that is being
652 /// created with System.Reflection.Emit
654 public TypeBuilder TypeBuilder;
657 /// If we are a generic type, this is the type we are
658 /// currently defining. We need to lookup members on this
659 /// instead of the TypeBuilder.
661 public Type CurrentType;
664 // This is the namespace in which this typecontainer
665 // was declared. We use this to resolve names.
667 public NamespaceEntry NamespaceEntry;
669 private Hashtable Cache = new Hashtable ();
671 public readonly string Basename;
673 protected Hashtable defined_names;
675 public TypeContainer PartialContainer;
677 readonly bool is_generic;
678 readonly int count_type_params;
679 readonly int count_current_type_params;
682 // Whether we are Generic
684 public bool IsGeneric {
688 else if (Parent != null)
689 return Parent.IsGeneric;
695 static string[] attribute_targets = new string [] { "type" };
697 public DeclSpace (NamespaceEntry ns, DeclSpace parent, MemberName name,
699 : base (parent, name, attrs)
702 Basename = name.Basename;
703 defined_names = new Hashtable ();
704 PartialContainer = null;
705 if (name.TypeArguments != null) {
707 count_type_params = count_current_type_params = name.TypeArguments.Count;
710 count_type_params += parent.count_type_params;
713 public override DeclSpace GenericDeclContainer {
718 /// Adds the member to defined_names table. It tests for duplications and enclosing name conflicts
720 protected virtual bool AddToContainer (MemberCore symbol, string name)
722 MemberCore mc = (MemberCore) defined_names [name];
725 defined_names.Add (name, symbol);
729 if (symbol.MarkForDuplicationCheck () && mc.MarkForDuplicationCheck ())
732 Report.SymbolRelatedToPreviousError (mc);
733 if ((mc.ModFlags & Modifiers.PARTIAL) != 0 && (symbol is ClassOrStruct || symbol is Interface)) {
734 Error_MissingPartialModifier (symbol);
738 if (this is RootTypes) {
739 Report.Error (101, symbol.Location,
740 "The namespace `{0}' already contains a definition for `{1}'",
741 ((DeclSpace)symbol).NamespaceEntry.GetSignatureForError (), symbol.MemberName.Name);
742 } else if (symbol is TypeParameter) {
743 Report.Error (692, symbol.Location,
744 "Duplicate type parameter `{0}'", name);
746 Report.Error (102, symbol.Location,
747 "The type `{0}' already contains a definition for `{1}'",
748 GetSignatureForError (), symbol.MemberName.Name);
755 /// Returns the MemberCore associated with a given name in the declaration
756 /// space. It doesn't return method based symbols !!
759 public MemberCore GetDefinition (string name)
761 return (MemberCore)defined_names [name];
765 // root_types contains all the types. All TopLevel types
766 // hence have a parent that points to `root_types', that is
767 // why there is a non-obvious test down here.
769 public bool IsTopLevel {
770 get { return (Parent != null && Parent.Parent == null); }
773 public virtual void CloseType ()
775 if ((caching_flags & Flags.CloseTypeCreated) == 0){
777 TypeBuilder.CreateType ();
780 // The try/catch is needed because
781 // nested enumerations fail to load when they
784 // Even if this is the right order (enumerations
785 // declared after types).
787 // Note that this still creates the type and
788 // it is possible to save it
790 caching_flags |= Flags.CloseTypeCreated;
794 protected virtual TypeAttributes TypeAttr {
795 get { return CodeGen.Module.DefaultCharSetType; }
799 /// Should be overriten by the appropriate declaration space
801 public abstract TypeBuilder DefineType ();
804 /// Define all members, but don't apply any attributes or do anything which may
805 /// access not-yet-defined classes. This method also creates the MemberCache.
807 public virtual bool DefineMembers ()
809 if (((ModFlags & Modifiers.NEW) != 0) && IsTopLevel) {
810 Report.Error (1530, Location, "Keyword `new' is not allowed on namespace elements");
816 protected void Error_MissingPartialModifier (MemberCore type)
818 Report.Error (260, type.Location,
819 "Missing partial modifier on declaration of type `{0}'. Another partial declaration of this type exists",
820 type.GetSignatureForError ());
823 public override string GetSignatureForError ()
826 return SimpleName.RemoveGenericArity (Name) + TypeParameter.GetSignatureForError (CurrentTypeParameters);
828 // Parent.GetSignatureForError
832 public bool CheckAccessLevel (Type check_type)
835 if (this is GenericMethod)
836 tb = Parent.TypeBuilder;
840 check_type = TypeManager.DropGenericTypeArguments (check_type);
841 if (check_type == tb)
844 if (TypeBuilder == null)
845 // FIXME: TypeBuilder will be null when invoked by Class.GetNormalBases().
846 // However, this is invoked again later -- so safe to return true.
847 // May also be null when resolving top-level attributes.
850 if (TypeManager.IsGenericParameter (check_type))
851 return true; // FIXME
853 TypeAttributes check_attr = check_type.Attributes & TypeAttributes.VisibilityMask;
856 // Broken Microsoft runtime, return public for arrays, no matter what
857 // the accessibility is for their underlying class, and they return
858 // NonPublic visibility for pointers
860 if (check_type.IsArray || check_type.IsPointer)
861 return CheckAccessLevel (TypeManager.GetElementType (check_type));
864 case TypeAttributes.Public:
867 case TypeAttributes.NotPublic:
869 if (TypeBuilder == null)
870 // FIXME: TypeBuilder will be null when invoked by Class.GetNormalBases().
871 // However, this is invoked again later -- so safe to return true.
872 // May also be null when resolving top-level attributes.
875 // This test should probably use the declaringtype.
877 return check_type.Assembly == TypeBuilder.Assembly ||
878 TypeManager.IsFriendAssembly (check_type.Assembly);
880 case TypeAttributes.NestedPublic:
883 case TypeAttributes.NestedPrivate:
884 return NestedAccessible (tb, check_type);
886 case TypeAttributes.NestedFamily:
888 // Only accessible to methods in current type or any subtypes
890 return FamilyAccessible (tb, check_type);
892 case TypeAttributes.NestedFamANDAssem:
893 return ((check_type.Assembly == tb.Assembly) ||
894 TypeManager.IsFriendAssembly (check_type.Assembly)) &&
895 FamilyAccessible (tb, check_type);
897 case TypeAttributes.NestedFamORAssem:
898 return (check_type.Assembly == tb.Assembly) ||
899 FamilyAccessible (tb, check_type) ||
900 TypeManager.IsFriendAssembly (check_type.Assembly);
902 case TypeAttributes.NestedAssembly:
903 return check_type.Assembly == tb.Assembly ||
904 TypeManager.IsFriendAssembly (check_type.Assembly);
907 Console.WriteLine ("HERE: " + check_attr);
912 protected bool NestedAccessible (Type tb, Type check_type)
914 Type declaring = check_type.DeclaringType;
915 return TypeBuilder == declaring ||
916 TypeManager.IsNestedChildOf (TypeBuilder, declaring);
919 protected bool FamilyAccessible (Type tb, Type check_type)
921 Type declaring = check_type.DeclaringType;
922 return TypeManager.IsNestedFamilyAccessible (TypeBuilder, declaring);
925 // Access level of a type.
927 enum AccessLevel { // Each column represents `is this scope larger or equal to Blah scope'
928 // Public Assembly Protected
929 Protected = (0 << 0) | (0 << 1) | (X << 2),
930 Public = (X << 0) | (X << 1) | (X << 2),
931 Private = (0 << 0) | (0 << 1) | (0 << 2),
932 Internal = (0 << 0) | (X << 1) | (0 << 2),
933 ProtectedOrInternal = (0 << 0) | (X << 1) | (X << 2),
936 static AccessLevel GetAccessLevelFromModifiers (int flags)
938 if ((flags & Modifiers.INTERNAL) != 0) {
940 if ((flags & Modifiers.PROTECTED) != 0)
941 return AccessLevel.ProtectedOrInternal;
943 return AccessLevel.Internal;
945 } else if ((flags & Modifiers.PROTECTED) != 0)
946 return AccessLevel.Protected;
947 else if ((flags & Modifiers.PRIVATE) != 0)
948 return AccessLevel.Private;
950 return AccessLevel.Public;
953 // What is the effective access level of this?
955 AccessLevel EffectiveAccessLevel {
957 AccessLevel myAccess = GetAccessLevelFromModifiers (ModFlags);
958 if (!IsTopLevel && (Parent != null))
959 return myAccess & Parent.EffectiveAccessLevel;
964 // Return the access level for type `t'
965 static AccessLevel TypeEffectiveAccessLevel (Type t)
968 return AccessLevel.Public;
969 if (t.IsNestedPrivate)
970 return AccessLevel.Private;
972 return AccessLevel.Internal;
974 // By now, it must be nested
975 AccessLevel parentLevel = TypeEffectiveAccessLevel (t.DeclaringType);
977 if (t.IsNestedPublic)
979 if (t.IsNestedAssembly)
980 return parentLevel & AccessLevel.Internal;
981 if (t.IsNestedFamily)
982 return parentLevel & AccessLevel.Protected;
983 if (t.IsNestedFamORAssem)
984 return parentLevel & AccessLevel.ProtectedOrInternal;
985 if (t.IsNestedFamANDAssem)
986 throw new NotImplementedException ("NestedFamANDAssem not implemented, cant make this kind of type from c# anyways");
988 // nested private is taken care of
990 throw new Exception ("I give up, what are you?");
994 // This answers `is the type P, as accessible as a member M which has the
995 // accessability @flags which is declared as a nested member of the type T, this declspace'
997 public bool AsAccessible (Type p, int flags)
999 if (TypeManager.IsGenericParameter (p))
1000 return true; // FIXME
1003 // 1) if M is private, its accessability is the same as this declspace.
1004 // we already know that P is accessible to T before this method, so we
1008 if ((flags & Modifiers.PRIVATE) != 0)
1011 while (p.IsArray || p.IsPointer || p.IsByRef)
1012 p = TypeManager.GetElementType (p);
1014 AccessLevel pAccess = TypeEffectiveAccessLevel (p);
1015 AccessLevel mAccess = this.EffectiveAccessLevel &
1016 GetAccessLevelFromModifiers (flags);
1018 // for every place from which we can access M, we must
1019 // be able to access P as well. So, we want
1020 // For every bit in M and P, M_i -> P_1 == true
1021 // or, ~ (M -> P) == 0 <-> ~ ( ~M | P) == 0
1023 return ~ (~ mAccess | pAccess) == 0;
1026 private Type LookupNestedTypeInHierarchy (string name)
1028 // if the member cache has been created, lets use it.
1029 // the member cache is MUCH faster.
1030 if (MemberCache != null)
1031 return MemberCache.FindNestedType (name);
1033 // no member cache. Do it the hard way -- reflection
1035 for (Type current_type = TypeBuilder;
1036 current_type != null && current_type != TypeManager.object_type;
1037 current_type = current_type.BaseType) {
1038 current_type = TypeManager.DropGenericTypeArguments (current_type);
1039 if (current_type is TypeBuilder) {
1040 TypeContainer tc = current_type == TypeBuilder
1042 : TypeManager.LookupTypeContainer (current_type);
1044 t = tc.FindNestedType (name);
1046 t = TypeManager.GetNestedType (current_type, name);
1049 if (t != null && CheckAccessLevel (t))
1057 // Public function used to locate types.
1059 // Set 'ignore_cs0104' to true if you want to ignore cs0104 errors.
1061 // Returns: Type or null if they type can not be found.
1063 public FullNamedExpression LookupType (string name, Location loc, bool ignore_cs0104)
1065 if (Cache.Contains (name))
1066 return (FullNamedExpression) Cache [name];
1068 FullNamedExpression e;
1069 Type t = LookupNestedTypeInHierarchy (name);
1071 e = new TypeExpression (t, Location.Null);
1072 else if (Parent != null)
1073 e = Parent.LookupType (name, loc, ignore_cs0104);
1075 e = NamespaceEntry.LookupNamespaceOrType (this, name, loc, ignore_cs0104);
1082 /// This function is broken and not what you're looking for. It should only
1083 /// be used while the type is still being created since it doesn't use the cache
1084 /// and relies on the filter doing the member name check.
1086 public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
1087 MemberFilter filter, object criteria);
1090 /// If we have a MemberCache, return it. This property may return null if the
1091 /// class doesn't have a member cache or while it's still being created.
1093 public abstract MemberCache MemberCache {
1097 public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
1099 if (a.Type == TypeManager.required_attr_type) {
1100 Report.Error (1608, a.Location, "The RequiredAttribute attribute is not permitted on C# types");
1103 TypeBuilder.SetCustomAttribute (cb);
1107 // Extensions for generics
1109 TypeParameter[] type_params;
1110 TypeParameter[] type_param_list;
1112 protected string GetInstantiationName ()
1114 StringBuilder sb = new StringBuilder (Name);
1116 for (int i = 0; i < type_param_list.Length; i++) {
1119 sb.Append (type_param_list [i].Name);
1122 return sb.ToString ();
1125 bool check_type_parameter (ArrayList list, int start, string name)
1127 for (int i = 0; i < start; i++) {
1128 TypeParameter param = (TypeParameter) list [i];
1130 if (param.Name != name)
1133 Report.SymbolRelatedToPreviousError (Parent);
1134 // TODO: Location is wrong (parent instead of child)
1135 Report.Warning (693, 3, Location,
1136 "Type parameter `{0}' has the same name as the type parameter from outer type `{1}'",
1137 name, Parent.GetSignatureForError ());
1145 TypeParameter[] initialize_type_params ()
1147 if (type_param_list != null)
1148 return type_param_list;
1150 DeclSpace the_parent = Parent;
1151 if (this is GenericMethod)
1155 TypeParameter[] parent_params = null;
1156 if ((the_parent != null) && the_parent.IsGeneric) {
1157 parent_params = the_parent.initialize_type_params ();
1158 start = parent_params != null ? parent_params.Length : 0;
1161 ArrayList list = new ArrayList ();
1162 if (parent_params != null)
1163 list.AddRange (parent_params);
1165 int count = type_params != null ? type_params.Length : 0;
1166 for (int i = 0; i < count; i++) {
1167 TypeParameter param = type_params [i];
1168 check_type_parameter (list, start, param.Name);
1172 type_param_list = new TypeParameter [list.Count];
1173 list.CopyTo (type_param_list, 0);
1174 return type_param_list;
1177 public virtual void SetParameterInfo (ArrayList constraints_list)
1180 if (constraints_list != null) {
1182 80, Location, "Constraints are not allowed " +
1183 "on non-generic declarations");
1189 TypeParameterName[] names = MemberName.TypeArguments.GetDeclarations ();
1190 type_params = new TypeParameter [names.Length];
1193 // Register all the names
1195 for (int i = 0; i < type_params.Length; i++) {
1196 TypeParameterName name = names [i];
1198 Constraints constraints = null;
1199 if (constraints_list != null) {
1200 int total = constraints_list.Count;
1201 for (int ii = 0; ii < total; ++ii) {
1202 Constraints constraints_at = (Constraints)constraints_list[ii];
1203 // TODO: it is used by iterators only
1204 if (constraints_at == null) {
1205 constraints_list.RemoveAt (ii);
1209 if (constraints_at.TypeParameter == name.Name) {
1210 constraints = constraints_at;
1211 constraints_list.RemoveAt(ii);
1217 type_params [i] = new TypeParameter (
1218 Parent, this, name.Name, constraints, name.OptAttributes,
1221 AddToContainer (type_params [i], name.Name);
1224 if (constraints_list != null && constraints_list.Count > 0) {
1225 foreach (Constraints constraint in constraints_list) {
1226 Report.Error(699, constraint.Location, "`{0}': A constraint references nonexistent type parameter `{1}'",
1227 GetSignatureForError (), constraint.TypeParameter);
1232 public TypeParameter[] TypeParameters {
1235 throw new InvalidOperationException ();
1236 if (type_param_list == null)
1237 initialize_type_params ();
1239 return type_param_list;
1243 public TypeParameter[] CurrentTypeParameters {
1246 throw new InvalidOperationException ();
1247 if (type_params != null)
1250 return new TypeParameter [0];
1254 public int CountTypeParameters {
1256 return count_type_params;
1260 public int CountCurrentTypeParameters {
1262 return count_current_type_params;
1266 public TypeParameterExpr LookupGeneric (string name, Location loc)
1271 TypeParameter [] current_params;
1272 if (this is TypeContainer)
1273 current_params = PartialContainer.CurrentTypeParameters;
1275 current_params = CurrentTypeParameters;
1277 foreach (TypeParameter type_param in current_params) {
1278 if (type_param.Name == name)
1279 return new TypeParameterExpr (type_param, loc);
1283 return Parent.LookupGeneric (name, loc);
1288 public override string[] ValidAttributeTargets {
1289 get { return attribute_targets; }
1292 protected override bool VerifyClsCompliance ()
1294 if (!base.VerifyClsCompliance ()) {
1298 if (type_params != null) {
1299 foreach (TypeParameter tp in type_params) {
1300 if (tp.Constraints == null)
1303 tp.Constraints.VerifyClsCompliance ();
1307 IDictionary cache = TypeManager.AllClsTopLevelTypes;
1308 string lcase = Name.ToLower (System.Globalization.CultureInfo.InvariantCulture);
1309 if (!cache.Contains (lcase)) {
1310 cache.Add (lcase, this);
1314 object val = cache [lcase];
1316 Type t = AttributeTester.GetImportedIgnoreCaseClsType (lcase);
1319 Report.SymbolRelatedToPreviousError (t);
1322 Report.SymbolRelatedToPreviousError ((DeclSpace)val);
1325 Report.Warning (3005, 1, Location, "Identifier `{0}' differing only in case is not CLS-compliant", GetSignatureForError ());
1327 Report.Error (3005, Location, "Identifier `{0}' differing only in case is not CLS-compliant", GetSignatureForError ());
1334 /// This is a readonly list of MemberInfo's.
1336 public class MemberList : IList {
1337 public readonly IList List;
1341 /// Create a new MemberList from the given IList.
1343 public MemberList (IList list)
1348 this.List = new ArrayList ();
1353 /// Concatenate the ILists `first' and `second' to a new MemberList.
1355 public MemberList (IList first, IList second)
1357 ArrayList list = new ArrayList ();
1358 list.AddRange (first);
1359 list.AddRange (second);
1364 public static readonly MemberList Empty = new MemberList (new ArrayList ());
1367 /// Cast the MemberList into a MemberInfo[] array.
1370 /// This is an expensive operation, only use it if it's really necessary.
1372 public static explicit operator MemberInfo [] (MemberList list)
1374 Timer.StartTimer (TimerType.MiscTimer);
1375 MemberInfo [] result = new MemberInfo [list.Count];
1376 list.CopyTo (result, 0);
1377 Timer.StopTimer (TimerType.MiscTimer);
1389 public bool IsSynchronized {
1391 return List.IsSynchronized;
1395 public object SyncRoot {
1397 return List.SyncRoot;
1401 public void CopyTo (Array array, int index)
1403 List.CopyTo (array, index);
1408 public IEnumerator GetEnumerator ()
1410 return List.GetEnumerator ();
1415 public bool IsFixedSize {
1421 public bool IsReadOnly {
1427 object IList.this [int index] {
1429 return List [index];
1433 throw new NotSupportedException ();
1437 // FIXME: try to find out whether we can avoid the cast in this indexer.
1438 public MemberInfo this [int index] {
1440 return (MemberInfo) List [index];
1444 public int Add (object value)
1446 throw new NotSupportedException ();
1449 public void Clear ()
1451 throw new NotSupportedException ();
1454 public bool Contains (object value)
1456 return List.Contains (value);
1459 public int IndexOf (object value)
1461 return List.IndexOf (value);
1464 public void Insert (int index, object value)
1466 throw new NotSupportedException ();
1469 public void Remove (object value)
1471 throw new NotSupportedException ();
1474 public void RemoveAt (int index)
1476 throw new NotSupportedException ();
1481 /// This interface is used to get all members of a class when creating the
1482 /// member cache. It must be implemented by all DeclSpace derivatives which
1483 /// want to support the member cache and by TypeHandle to get caching of
1484 /// non-dynamic types.
1486 public interface IMemberContainer {
1488 /// The name of the IMemberContainer. This is only used for
1489 /// debugging purposes.
1496 /// The type of this IMemberContainer.
1503 /// Returns the IMemberContainer of the base class or null if this
1504 /// is an interface or TypeManger.object_type.
1505 /// This is used when creating the member cache for a class to get all
1506 /// members from the base class.
1508 MemberCache BaseCache {
1513 /// Whether this is an interface.
1520 /// Returns all members of this class with the corresponding MemberTypes
1521 /// and BindingFlags.
1524 /// When implementing this method, make sure not to return any inherited
1525 /// members and check the MemberTypes and BindingFlags properly.
1526 /// Unfortunately, System.Reflection is lame and doesn't provide a way to
1527 /// get the BindingFlags (static/non-static,public/non-public) in the
1528 /// MemberInfo class, but the cache needs this information. That's why
1529 /// this method is called multiple times with different BindingFlags.
1531 MemberList GetMembers (MemberTypes mt, BindingFlags bf);
1534 /// Return the container's member cache.
1536 MemberCache MemberCache {
1542 /// The MemberCache is used by dynamic and non-dynamic types to speed up
1543 /// member lookups. It has a member name based hash table; it maps each member
1544 /// name to a list of CacheEntry objects. Each CacheEntry contains a MemberInfo
1545 /// and the BindingFlags that were initially used to get it. The cache contains
1546 /// all members of the current class and all inherited members. If this cache is
1547 /// for an interface types, it also contains all inherited members.
1549 /// There are two ways to get a MemberCache:
1550 /// * if this is a dynamic type, lookup the corresponding DeclSpace and then
1551 /// use the DeclSpace.MemberCache property.
1552 /// * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
1553 /// TypeHandle instance for the type and then use TypeHandle.MemberCache.
1555 public class MemberCache {
1556 public readonly IMemberContainer Container;
1557 protected Hashtable member_hash;
1558 protected Hashtable method_hash;
1561 /// Create a new MemberCache for the given IMemberContainer `container'.
1563 public MemberCache (IMemberContainer container)
1565 this.Container = container;
1567 Timer.IncrementCounter (CounterType.MemberCache);
1568 Timer.StartTimer (TimerType.CacheInit);
1570 // If we have a base class (we have a base class unless we're
1571 // TypeManager.object_type), we deep-copy its MemberCache here.
1572 if (Container.BaseCache != null)
1573 member_hash = SetupCache (Container.BaseCache);
1575 member_hash = new Hashtable ();
1577 // If this is neither a dynamic type nor an interface, create a special
1578 // method cache with all declared and inherited methods.
1579 Type type = container.Type;
1580 if (!(type is TypeBuilder) && !type.IsInterface &&
1581 // !(type.IsGenericType && (type.GetGenericTypeDefinition () is TypeBuilder)) &&
1582 !TypeManager.IsGenericType (type) &&
1583 (Container.BaseCache == null || Container.BaseCache.method_hash != null)) {
1584 method_hash = new Hashtable ();
1588 // Add all members from the current class.
1589 AddMembers (Container);
1591 Timer.StopTimer (TimerType.CacheInit);
1594 public MemberCache (Type[] ifaces)
1597 // The members of this cache all belong to other caches.
1598 // So, 'Container' will not be used.
1600 this.Container = null;
1602 member_hash = new Hashtable ();
1606 foreach (Type itype in ifaces)
1607 AddCacheContents (TypeManager.LookupMemberCache (itype));
1611 /// Bootstrap this member cache by doing a deep-copy of our base.
1613 static Hashtable SetupCache (MemberCache base_class)
1615 Hashtable hash = new Hashtable ();
1617 if (base_class == null)
1620 IDictionaryEnumerator it = base_class.member_hash.GetEnumerator ();
1621 while (it.MoveNext ()) {
1622 hash [it.Key] = ((ArrayList) it.Value).Clone ();
1629 /// Add the contents of `cache' to the member_hash.
1631 void AddCacheContents (MemberCache cache)
1633 IDictionaryEnumerator it = cache.member_hash.GetEnumerator ();
1634 while (it.MoveNext ()) {
1635 ArrayList list = (ArrayList) member_hash [it.Key];
1637 member_hash [it.Key] = list = new ArrayList ();
1639 ArrayList entries = (ArrayList) it.Value;
1640 for (int i = entries.Count-1; i >= 0; i--) {
1641 CacheEntry entry = (CacheEntry) entries [i];
1643 if (entry.Container != cache.Container)
1651 /// Add all members from class `container' to the cache.
1653 void AddMembers (IMemberContainer container)
1655 // We need to call AddMembers() with a single member type at a time
1656 // to get the member type part of CacheEntry.EntryType right.
1657 if (!container.IsInterface) {
1658 AddMembers (MemberTypes.Constructor, container);
1659 AddMembers (MemberTypes.Field, container);
1661 AddMembers (MemberTypes.Method, container);
1662 AddMembers (MemberTypes.Property, container);
1663 AddMembers (MemberTypes.Event, container);
1664 // Nested types are returned by both Static and Instance searches.
1665 AddMembers (MemberTypes.NestedType,
1666 BindingFlags.Static | BindingFlags.Public, container);
1667 AddMembers (MemberTypes.NestedType,
1668 BindingFlags.Static | BindingFlags.NonPublic, container);
1671 void AddMembers (MemberTypes mt, IMemberContainer container)
1673 AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
1674 AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
1675 AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
1676 AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
1680 /// Add all members from class `container' with the requested MemberTypes and
1681 /// BindingFlags to the cache. This method is called multiple times with different
1682 /// MemberTypes and BindingFlags.
1684 void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
1686 MemberList members = container.GetMembers (mt, bf);
1688 foreach (MemberInfo member in members) {
1689 string name = member.Name;
1691 int pos = name.IndexOf ('<');
1693 name = name.Substring (0, pos);
1695 // We use a name-based hash table of ArrayList's.
1696 ArrayList list = (ArrayList) member_hash [name];
1698 list = new ArrayList ();
1699 member_hash.Add (name, list);
1702 // When this method is called for the current class, the list will
1703 // already contain all inherited members from our base classes.
1704 // We cannot add new members in front of the list since this'd be an
1705 // expensive operation, that's why the list is sorted in reverse order
1706 // (ie. members from the current class are coming last).
1707 list.Add (new CacheEntry (container, member, mt, bf));
1712 /// Add all declared and inherited methods from class `type' to the method cache.
1714 void AddMethods (Type type)
1716 AddMethods (BindingFlags.Static | BindingFlags.Public |
1717 BindingFlags.FlattenHierarchy, type);
1718 AddMethods (BindingFlags.Static | BindingFlags.NonPublic |
1719 BindingFlags.FlattenHierarchy, type);
1720 AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
1721 AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
1724 static ArrayList overrides = new ArrayList ();
1726 void AddMethods (BindingFlags bf, Type type)
1728 MethodBase [] members = type.GetMethods (bf);
1730 Array.Reverse (members);
1732 foreach (MethodBase member in members) {
1733 string name = member.Name;
1735 // We use a name-based hash table of ArrayList's.
1736 ArrayList list = (ArrayList) method_hash [name];
1738 list = new ArrayList ();
1739 method_hash.Add (name, list);
1742 MethodInfo curr = (MethodInfo) member;
1743 while (curr.IsVirtual && (curr.Attributes & MethodAttributes.NewSlot) == 0) {
1744 MethodInfo base_method = curr.GetBaseDefinition ();
1746 if (base_method == curr)
1747 // Not every virtual function needs to have a NewSlot flag.
1750 overrides.Add (curr);
1751 list.Add (new CacheEntry (null, base_method, MemberTypes.Method, bf));
1755 if (overrides.Count > 0) {
1756 for (int i = 0; i < overrides.Count; ++i)
1757 TypeManager.RegisterOverride ((MethodBase) overrides [i], curr);
1761 // Unfortunately, the elements returned by Type.GetMethods() aren't
1762 // sorted so we need to do this check for every member.
1763 BindingFlags new_bf = bf;
1764 if (member.DeclaringType == type)
1765 new_bf |= BindingFlags.DeclaredOnly;
1767 list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
1772 /// Compute and return a appropriate `EntryType' magic number for the given
1773 /// MemberTypes and BindingFlags.
1775 protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
1777 EntryType type = EntryType.None;
1779 if ((mt & MemberTypes.Constructor) != 0)
1780 type |= EntryType.Constructor;
1781 if ((mt & MemberTypes.Event) != 0)
1782 type |= EntryType.Event;
1783 if ((mt & MemberTypes.Field) != 0)
1784 type |= EntryType.Field;
1785 if ((mt & MemberTypes.Method) != 0)
1786 type |= EntryType.Method;
1787 if ((mt & MemberTypes.Property) != 0)
1788 type |= EntryType.Property;
1789 // Nested types are returned by static and instance searches.
1790 if ((mt & MemberTypes.NestedType) != 0)
1791 type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;
1793 if ((bf & BindingFlags.Instance) != 0)
1794 type |= EntryType.Instance;
1795 if ((bf & BindingFlags.Static) != 0)
1796 type |= EntryType.Static;
1797 if ((bf & BindingFlags.Public) != 0)
1798 type |= EntryType.Public;
1799 if ((bf & BindingFlags.NonPublic) != 0)
1800 type |= EntryType.NonPublic;
1801 if ((bf & BindingFlags.DeclaredOnly) != 0)
1802 type |= EntryType.Declared;
1808 /// The `MemberTypes' enumeration type is a [Flags] type which means that it may
1809 /// denote multiple member types. Returns true if the given flags value denotes a
1810 /// single member types.
1812 public static bool IsSingleMemberType (MemberTypes mt)
1815 case MemberTypes.Constructor:
1816 case MemberTypes.Event:
1817 case MemberTypes.Field:
1818 case MemberTypes.Method:
1819 case MemberTypes.Property:
1820 case MemberTypes.NestedType:
1829 /// We encode the MemberTypes and BindingFlags of each members in a "magic"
1830 /// number to speed up the searching process.
1833 protected enum EntryType {
1838 MaskStatic = Instance|Static,
1842 MaskProtection = Public|NonPublic,
1846 Constructor = 0x020,
1853 MaskType = Constructor|Event|Field|Method|Property|NestedType
1856 protected class CacheEntry {
1857 public readonly IMemberContainer Container;
1858 public readonly EntryType EntryType;
1859 public readonly MemberInfo Member;
1861 public CacheEntry (IMemberContainer container, MemberInfo member,
1862 MemberTypes mt, BindingFlags bf)
1864 this.Container = container;
1865 this.Member = member;
1866 this.EntryType = GetEntryType (mt, bf);
1869 public override string ToString ()
1871 return String.Format ("CacheEntry ({0}:{1}:{2})", Container.Name,
1877 /// This is called each time we're walking up one level in the class hierarchy
1878 /// and checks whether we can abort the search since we've already found what
1879 /// we were looking for.
1881 protected bool DoneSearching (ArrayList list)
1884 // We've found exactly one member in the current class and it's not
1885 // a method or constructor.
1887 if (list.Count == 1 && !(list [0] is MethodBase))
1891 // Multiple properties: we query those just to find out the indexer
1894 if ((list.Count > 0) && (list [0] is PropertyInfo))
1901 /// Looks up members with name `name'. If you provide an optional
1902 /// filter function, it'll only be called with members matching the
1903 /// requested member name.
1905 /// This method will try to use the cache to do the lookup if possible.
1907 /// Unlike other FindMembers implementations, this method will always
1908 /// check all inherited members - even when called on an interface type.
1910 /// If you know that you're only looking for methods, you should use
1911 /// MemberTypes.Method alone since this speeds up the lookup a bit.
1912 /// When doing a method-only search, it'll try to use a special method
1913 /// cache (unless it's a dynamic type or an interface) and the returned
1914 /// MemberInfo's will have the correct ReflectedType for inherited methods.
1915 /// The lookup process will automatically restart itself in method-only
1916 /// search mode if it discovers that it's about to return methods.
1918 ArrayList global = new ArrayList ();
1919 bool using_global = false;
1921 static MemberInfo [] emptyMemberInfo = new MemberInfo [0];
1923 public MemberInfo [] FindMembers (MemberTypes mt, BindingFlags bf, string name,
1924 MemberFilter filter, object criteria)
1927 throw new Exception ();
1929 bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
1930 bool method_search = mt == MemberTypes.Method;
1931 // If we have a method cache and we aren't already doing a method-only search,
1932 // then we restart a method search if the first match is a method.
1933 bool do_method_search = !method_search && (method_hash != null);
1935 ArrayList applicable;
1937 // If this is a method-only search, we try to use the method cache if
1938 // possible; a lookup in the method cache will return a MemberInfo with
1939 // the correct ReflectedType for inherited methods.
1941 if (method_search && (method_hash != null))
1942 applicable = (ArrayList) method_hash [name];
1944 applicable = (ArrayList) member_hash [name];
1946 if (applicable == null)
1947 return emptyMemberInfo;
1950 // 32 slots gives 53 rss/54 size
1951 // 2/4 slots gives 55 rss
1953 // Strange: from 25,000 calls, only 1,800
1954 // are above 2. Why does this impact it?
1957 using_global = true;
1959 Timer.StartTimer (TimerType.CachedLookup);
1961 EntryType type = GetEntryType (mt, bf);
1963 IMemberContainer current = Container;
1965 bool do_interface_search = current.IsInterface;
1967 // `applicable' is a list of all members with the given member name `name'
1968 // in the current class and all its base classes. The list is sorted in
1969 // reverse order due to the way how the cache is initialy created (to speed
1970 // things up, we're doing a deep-copy of our base).
1972 for (int i = applicable.Count-1; i >= 0; i--) {
1973 CacheEntry entry = (CacheEntry) applicable [i];
1975 // This happens each time we're walking one level up in the class
1976 // hierarchy. If we're doing a DeclaredOnly search, we must abort
1977 // the first time this happens (this may already happen in the first
1978 // iteration of this loop if there are no members with the name we're
1979 // looking for in the current class).
1980 if (entry.Container != current) {
1984 if (!do_interface_search && DoneSearching (global))
1987 current = entry.Container;
1990 // Is the member of the correct type ?
1991 if ((entry.EntryType & type & EntryType.MaskType) == 0)
1994 // Is the member static/non-static ?
1995 if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
1998 // Apply the filter to it.
1999 if (filter (entry.Member, criteria)) {
2000 if ((entry.EntryType & EntryType.MaskType) != EntryType.Method) {
2001 do_method_search = false;
2004 // Because interfaces support multiple inheritance we have to be sure that
2005 // base member is from same interface, so only top level member will be returned
2006 if (do_interface_search && global.Count > 0) {
2007 bool member_already_exists = false;
2009 foreach (MemberInfo mi in global) {
2010 if (mi is MethodBase)
2013 if (IsInterfaceBaseInterface (TypeManager.GetInterfaces (mi.DeclaringType), entry.Member.DeclaringType)) {
2014 member_already_exists = true;
2018 if (member_already_exists)
2022 global.Add (entry.Member);
2026 Timer.StopTimer (TimerType.CachedLookup);
2028 // If we have a method cache and we aren't already doing a method-only
2029 // search, we restart in method-only search mode if the first match is
2030 // a method. This ensures that we return a MemberInfo with the correct
2031 // ReflectedType for inherited methods.
2032 if (do_method_search && (global.Count > 0)){
2033 using_global = false;
2035 return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
2038 using_global = false;
2039 MemberInfo [] copy = new MemberInfo [global.Count];
2040 global.CopyTo (copy);
2045 /// Returns true if iterface exists in any base interfaces (ifaces)
2047 static bool IsInterfaceBaseInterface (Type[] ifaces, Type ifaceToFind)
2049 foreach (Type iface in ifaces) {
2050 if (iface == ifaceToFind)
2053 Type[] base_ifaces = TypeManager.GetInterfaces (iface);
2054 if (base_ifaces.Length > 0 && IsInterfaceBaseInterface (base_ifaces, ifaceToFind))
2060 // find the nested type @name in @this.
2061 public Type FindNestedType (string name)
2063 ArrayList applicable = (ArrayList) member_hash [name];
2064 if (applicable == null)
2067 for (int i = applicable.Count-1; i >= 0; i--) {
2068 CacheEntry entry = (CacheEntry) applicable [i];
2069 if ((entry.EntryType & EntryType.NestedType & EntryType.MaskType) != 0)
2070 return (Type) entry.Member;
2077 // This finds the method or property for us to override. invocationType is the type where
2078 // the override is going to be declared, name is the name of the method/property, and
2079 // paramTypes is the parameters, if any to the method or property
2081 // Because the MemberCache holds members from this class and all the base classes,
2082 // we can avoid tons of reflection stuff.
2084 public MemberInfo FindMemberToOverride (Type invocationType, string name, Type [] paramTypes, GenericMethod genericMethod, bool is_property)
2086 ArrayList applicable;
2087 if (method_hash != null && !is_property)
2088 applicable = (ArrayList) method_hash [name];
2090 applicable = (ArrayList) member_hash [name];
2092 if (applicable == null)
2095 // Walk the chain of methods, starting from the top.
2097 for (int i = applicable.Count - 1; i >= 0; i--) {
2098 CacheEntry entry = (CacheEntry) applicable [i];
2100 if ((entry.EntryType & (is_property ? (EntryType.Property | EntryType.Field) : EntryType.Method)) == 0)
2103 PropertyInfo pi = null;
2104 MethodInfo mi = null;
2105 FieldInfo fi = null;
2106 Type [] cmpAttrs = null;
2109 if ((entry.EntryType & EntryType.Field) != 0) {
2110 fi = (FieldInfo)entry.Member;
2112 // TODO: For this case we ignore member type
2113 //fb = TypeManager.GetField (fi);
2114 //cmpAttrs = new Type[] { fb.MemberType };
2116 pi = (PropertyInfo) entry.Member;
2117 cmpAttrs = TypeManager.GetArgumentTypes (pi);
2120 mi = (MethodInfo) entry.Member;
2121 cmpAttrs = TypeManager.GetParameterData (mi).Types;
2125 // TODO: Almost duplicate !
2127 switch (fi.Attributes & FieldAttributes.FieldAccessMask) {
2128 case FieldAttributes.PrivateScope:
2130 case FieldAttributes.Private:
2132 // A private method is Ok if we are a nested subtype.
2133 // The spec actually is not very clear about this, see bug 52458.
2135 if (!invocationType.Equals (entry.Container.Type) &&
2136 !TypeManager.IsNestedChildOf (invocationType, entry.Container.Type))
2139 case FieldAttributes.FamANDAssem:
2140 case FieldAttributes.Assembly:
2142 // Check for assembly methods
2144 if (mi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
2148 return entry.Member;
2152 // Check the arguments
2154 if (cmpAttrs.Length != paramTypes.Length)
2158 for (j = 0; j < cmpAttrs.Length; ++j)
2159 if (!TypeManager.IsEqual (paramTypes [j], cmpAttrs [j]))
2161 if (j < cmpAttrs.Length)
2165 // check generic arguments for methods
2168 Type [] cmpGenArgs = TypeManager.GetGenericArguments (mi);
2169 if (genericMethod == null && cmpGenArgs.Length != 0)
2171 if (genericMethod != null && cmpGenArgs.Length != genericMethod.TypeParameters.Length)
2176 // get one of the methods because this has the visibility info.
2179 mi = pi.GetGetMethod (true);
2181 mi = pi.GetSetMethod (true);
2187 switch (mi.Attributes & MethodAttributes.MemberAccessMask) {
2188 case MethodAttributes.PrivateScope:
2190 case MethodAttributes.Private:
2192 // A private method is Ok if we are a nested subtype.
2193 // The spec actually is not very clear about this, see bug 52458.
2195 if (!invocationType.Equals (entry.Container.Type) &&
2196 !TypeManager.IsNestedChildOf (invocationType, entry.Container.Type))
2199 case MethodAttributes.FamANDAssem:
2200 case MethodAttributes.Assembly:
2202 // Check for assembly methods
2204 if (mi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
2208 return entry.Member;
2215 /// The method is looking for conflict with inherited symbols (errors CS0108, CS0109).
2216 /// We handle two cases. The first is for types without parameters (events, field, properties).
2217 /// The second are methods, indexers and this is why ignore_complex_types is here.
2218 /// The latest param is temporary hack. See DoDefineMembers method for more info.
2220 public MemberInfo FindMemberWithSameName (string name, bool ignore_complex_types, MemberInfo ignore_member)
2222 ArrayList applicable = null;
2224 if (method_hash != null)
2225 applicable = (ArrayList) method_hash [name];
2227 if (applicable != null) {
2228 for (int i = applicable.Count - 1; i >= 0; i--) {
2229 CacheEntry entry = (CacheEntry) applicable [i];
2230 if ((entry.EntryType & EntryType.Public) != 0)
2231 return entry.Member;
2235 if (member_hash == null)
2237 applicable = (ArrayList) member_hash [name];
2239 if (applicable != null) {
2240 for (int i = applicable.Count - 1; i >= 0; i--) {
2241 CacheEntry entry = (CacheEntry) applicable [i];
2242 if ((entry.EntryType & EntryType.Public) != 0 & entry.Member != ignore_member) {
2243 if (ignore_complex_types) {
2244 if ((entry.EntryType & EntryType.Method) != 0)
2247 // Does exist easier way how to detect indexer ?
2248 if ((entry.EntryType & EntryType.Property) != 0) {
2249 Type[] arg_types = TypeManager.GetArgumentTypes ((PropertyInfo)entry.Member);
2250 if (arg_types.Length > 0)
2254 return entry.Member;
2261 Hashtable locase_table;
2264 /// Builds low-case table for CLS Compliance test
2266 public Hashtable GetPublicMembers ()
2268 if (locase_table != null)
2269 return locase_table;
2271 locase_table = new Hashtable ();
2272 foreach (DictionaryEntry entry in member_hash) {
2273 ArrayList members = (ArrayList)entry.Value;
2274 for (int ii = 0; ii < members.Count; ++ii) {
2275 CacheEntry member_entry = (CacheEntry) members [ii];
2277 if ((member_entry.EntryType & EntryType.Public) == 0)
2280 // TODO: Does anyone know easier way how to detect that member is internal ?
2281 switch (member_entry.EntryType & EntryType.MaskType) {
2282 case EntryType.Constructor:
2285 case EntryType.Field:
2286 if ((((FieldInfo)member_entry.Member).Attributes & (FieldAttributes.Assembly | FieldAttributes.Public)) == FieldAttributes.Assembly)
2290 case EntryType.Method:
2291 if ((((MethodInfo)member_entry.Member).Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
2295 case EntryType.Property:
2296 PropertyInfo pi = (PropertyInfo)member_entry.Member;
2297 if (pi.GetSetMethod () == null && pi.GetGetMethod () == null)
2301 case EntryType.Event:
2302 EventInfo ei = (EventInfo)member_entry.Member;
2303 MethodInfo mi = ei.GetAddMethod ();
2304 if ((mi.Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
2308 string lcase = ((string)entry.Key).ToLower (System.Globalization.CultureInfo.InvariantCulture);
2309 locase_table [lcase] = member_entry.Member;
2313 return locase_table;
2316 public Hashtable Members {
2323 /// Cls compliance check whether methods or constructors parameters differing only in ref or out, or in array rank
2326 // TODO: refactor as method is always 'this'
2327 public static void VerifyClsParameterConflict (ArrayList al, MethodCore method, MemberInfo this_builder)
2329 EntryType tested_type = (method is Constructor ? EntryType.Constructor : EntryType.Method) | EntryType.Public;
2331 for (int i = 0; i < al.Count; ++i) {
2332 MemberCache.CacheEntry entry = (MemberCache.CacheEntry) al [i];
2335 if (entry.Member == this_builder)
2338 if ((entry.EntryType & tested_type) != tested_type)
2341 MethodBase method_to_compare = (MethodBase)entry.Member;
2342 AttributeTester.Result result = AttributeTester.AreOverloadedMethodParamsClsCompliant (
2343 method.ParameterTypes, TypeManager.GetParameterData (method_to_compare).Types);
2345 if (result == AttributeTester.Result.Ok)
2348 IMethodData md = TypeManager.GetMethod (method_to_compare);
2350 // TODO: now we are ignoring CLSCompliance(false) on method from other assembly which is buggy.
2351 // However it is exactly what csc does.
2352 if (md != null && !md.IsClsComplianceRequired ())
2355 Report.SymbolRelatedToPreviousError (entry.Member);
2357 case AttributeTester.Result.RefOutArrayError:
2358 Report.Error (3006, method.Location, "Overloaded method `{0}' differing only in ref or out, or in array rank, is not CLS-compliant", method.GetSignatureForError ());
2360 case AttributeTester.Result.ArrayArrayError:
2361 Report.Error (3007, method.Location, "Overloaded method `{0}' differing only by unnamed array types is not CLS-compliant", method.GetSignatureForError ());
2365 throw new NotImplementedException (result.ToString ());