2 // membercache.cs: A container for all member lookups
4 // Author: Miguel de Icaza (miguel@gnu.org)
5 // Marek Safar (marek.safar@gmail.com)
7 // Dual licensed under the terms of the MIT X11 or GNU GPL
9 // Copyright 2001 Ximian, Inc (http://www.ximian.com)
10 // Copyright 2004-2010 Novell, Inc
11 // Copyright 2011 Xamarin Inc
16 using System.Collections.Generic;
18 namespace Mono.CSharp {
21 public enum MemberKind
37 TypeParameter = 1 << 16,
40 PointerType = 1 << 20,
41 InternalCompilerType = 1 << 21,
42 MissingType = 1 << 22,
46 NestedMask = Class | Struct | Delegate | Enum | Interface,
47 GenericMask = Method | Class | Struct | Delegate | Interface,
48 MaskType = Constructor | Event | Field | Method | Property | Indexer | Operator | Destructor | NestedMask
52 public enum BindingRestriction
56 // Inspect only queried type members
57 DeclaredOnly = 1 << 1,
60 InstanceOnly = 1 << 2,
64 // Member has to be override
68 public struct MemberFilter : IEquatable<MemberSpec>
70 public readonly string Name;
71 public readonly MemberKind Kind;
72 public readonly AParametersCollection Parameters;
73 public readonly TypeSpec MemberType;
74 public readonly int Arity; // -1 to ignore the check
76 public MemberFilter (MethodSpec m)
79 Kind = MemberKind.Method;
80 Parameters = m.Parameters;
81 MemberType = m.ReturnType;
85 public MemberFilter (string name, int arity, MemberKind kind, AParametersCollection param, TypeSpec type)
94 public static MemberFilter Constructor (AParametersCollection param)
96 return new MemberFilter (Mono.CSharp.Constructor.ConstructorName, 0, MemberKind.Constructor, param, null);
99 public static MemberFilter Property (string name, TypeSpec type)
101 return new MemberFilter (name, 0, MemberKind.Property, null, type);
104 public static MemberFilter Field (string name, TypeSpec type)
106 return new MemberFilter (name, 0, MemberKind.Field, null, type);
109 public static MemberFilter Method (string name, int arity, AParametersCollection param, TypeSpec type)
111 return new MemberFilter (name, arity, MemberKind.Method, param, type);
114 #region IEquatable<MemberSpec> Members
116 public bool Equals (MemberSpec other)
118 // Is the member of the correct type ?
119 // TODO: Isn't this redundant ?
120 if ((other.Kind & Kind & MemberKind.MaskType) == 0)
123 // Check arity when not disabled
124 if (Arity >= 0 && Arity != other.Arity)
127 if (Parameters != null) {
128 if (other is IParametersMember) {
129 var other_param = ((IParametersMember) other).Parameters;
130 if (!TypeSpecComparer.Override.IsEqual (Parameters, other_param))
137 if (MemberType != null) {
138 if (other is IInterfaceMemberSpec) {
139 var other_type = ((IInterfaceMemberSpec) other).MemberType;
140 if (!TypeSpecComparer.Override.IsEqual (other_type, MemberType))
154 // The MemberCache is the main members container used by compiler. It contains
155 // all members imported or defined during compilation using on demand filling
156 // process. Inflated containers are also using MemberCache to make inflated
157 // members look like normal definition.
159 // All of the methods are performance and memory sensitive as the MemberCache
160 // is the underlying engine of all member based operations.
162 public class MemberCache
167 HasConversionOperator = 1 << 1,
168 HasUserOperator = 1 << 2
171 readonly Dictionary<string, IList<MemberSpec>> member_hash;
172 Dictionary<string, MemberSpec[]> locase_members;
173 IList<MethodSpec> missing_abstract;
174 StateFlags state; // TODO: Move to TypeSpec or ITypeDefinition
176 public static readonly string IndexerNameAlias = "<this>";
178 public static readonly MemberCache Empty = new MemberCache (0);
180 public MemberCache ()
185 public MemberCache (int capacity)
187 member_hash = new Dictionary<string, IList<MemberSpec>> (capacity);
190 public MemberCache (MemberCache cache)
191 : this (cache.member_hash.Count)
193 this.state = cache.state;
197 // Creates a new MemberCache for the given `container'.
199 public MemberCache (TypeContainer container)
200 : this () // TODO: Optimize the size
205 // For cases where we need to union cache members
207 public void AddBaseType (TypeSpec baseType)
209 var cache = baseType.MemberCache;
211 IList<MemberSpec> list;
212 foreach (var entry in cache.member_hash) {
213 if (!member_hash.TryGetValue (entry.Key, out list)) {
214 if (entry.Value.Count == 1) {
217 list = new List<MemberSpec> (entry.Value);
220 member_hash.Add (entry.Key, list);
224 foreach (var ce in entry.Value) {
225 if (list.Contains (ce))
228 if (list is MemberSpec[]) {
229 list = new List<MemberSpec> { list [0] };
230 member_hash[entry.Key] = list;
239 // Member-cache does not contain base members but it does
240 // contain all base interface members, so the Lookup code
241 // can use simple inheritance rules.
243 // Does not work recursively because of generic interfaces
245 public void AddInterface (TypeSpec iface)
247 var cache = iface.MemberCache;
249 IList<MemberSpec> list;
250 foreach (var entry in cache.member_hash) {
251 if (!member_hash.TryGetValue (entry.Key, out list)) {
252 if (entry.Value.Count == 1) {
255 list = new List<MemberSpec> (entry.Value);
258 member_hash.Add (entry.Key, list);
262 foreach (var ce in entry.Value) {
264 // When two or more different base interfaces implemenent common
270 if (list.Contains (ce))
273 if (AddInterfaceMember (ce, ref list))
274 member_hash[entry.Key] = list;
279 public void AddMember (InterfaceMemberBase imb, string exlicitName, MemberSpec ms)
281 // Explicit names cannot be looked-up but can be used for
282 // collision checking (no name mangling needed)
283 if (imb.IsExplicitImpl)
284 AddMember (exlicitName, ms, false);
290 // Add non-explicit member to member cache
292 public void AddMember (MemberSpec ms)
294 AddMember (GetLookupName (ms), ms, false);
297 void AddMember (string name, MemberSpec member, bool removeHiddenMembers)
299 if (member.Kind == MemberKind.Operator) {
300 var dt = member.DeclaringType;
304 // Some core types have user operators but they cannot be used like normal
305 // user operators as they are predefined and therefore having different
306 // rules (e.g. binary operators) by not setting the flag we hide them for
309 if (!BuiltinTypeSpec.IsPrimitiveType (dt) || dt.BuiltinType == BuiltinTypeSpec.Type.Char) {
310 switch (dt.BuiltinType) {
311 case BuiltinTypeSpec.Type.String:
312 case BuiltinTypeSpec.Type.Delegate:
313 case BuiltinTypeSpec.Type.MulticastDelegate:
316 if (name == Operator.GetMetadataName (Operator.OpType.Implicit) || name == Operator.GetMetadataName (Operator.OpType.Explicit)) {
317 state |= StateFlags.HasConversionOperator;
319 state |= StateFlags.HasUserOperator;
327 IList<MemberSpec> list;
328 if (!member_hash.TryGetValue (name, out list)) {
329 member_hash.Add (name, new MemberSpec[] { member });
333 if (removeHiddenMembers && member.DeclaringType.IsInterface) {
334 if (AddInterfaceMember (member, ref list))
335 member_hash[name] = list;
337 if (list.Count == 1) {
338 list = new List<MemberSpec> { list[0] };
339 member_hash[name] = list;
346 public void AddMemberImported (MemberSpec ms)
348 AddMember (GetLookupName (ms), ms, true);
352 // Ignores any base interface member which can be hidden
355 static bool AddInterfaceMember (MemberSpec member, ref IList<MemberSpec> existing)
357 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : null;
360 // interface IA : IB { int Prop { set; } }
361 // interface IB { bool Prop { get; } }
363 // IB.Prop is never accessible from IA interface
365 for (int i = 0; i < existing.Count; ++i) {
366 var entry = existing[i];
368 if (entry.Arity != member.Arity)
371 AParametersCollection entry_param = null;
372 if (member_param != null) {
373 var entry_pm = entry as IParametersMember;
374 if (entry_pm != null) {
375 entry_param = entry_pm.Parameters;
376 if (!TypeSpecComparer.Override.IsEqual (entry_param, member_param))
381 if (member.DeclaringType.ImplementsInterface (entry.DeclaringType, false)) {
382 if (existing.Count == 1) {
383 existing = new MemberSpec[] { member };
387 existing.RemoveAt (i--);
391 if ((entry.DeclaringType == member.DeclaringType && entry.IsAccessor == member.IsAccessor))
394 if (entry.DeclaringType.ImplementsInterface (member.DeclaringType, false) && AParametersCollection.HasSameParameterDefaults (entry_param, member_param))
398 if (existing.Count == 1) {
399 existing = new List<MemberSpec> { existing[0], member };
403 existing.Add (member);
407 public static MemberSpec FindMember (TypeSpec container, MemberFilter filter, BindingRestriction restrictions)
409 if (filter.Kind == MemberKind.Method && container.Kind == MemberKind.TypeParameter && filter.Parameters == null)
410 throw new NotSupportedException ("type parameters methods cannot be lookup up due to two stage setup");
412 IList<MemberSpec> applicable;
413 var top_container = container;
416 if (container.MemberCache.member_hash.TryGetValue (filter.Name, out applicable)) {
417 // Start from the end because interface members are in reverse order
418 for (int i = applicable.Count - 1; i >= 0; i--) {
419 var entry = applicable [i];
421 if ((restrictions & BindingRestriction.InstanceOnly) != 0 && entry.IsStatic)
424 if ((restrictions & BindingRestriction.NoAccessors) != 0 && entry.IsAccessor)
427 if ((restrictions & BindingRestriction.OverrideOnly) != 0 && (entry.Modifiers & Modifiers.OVERRIDE) == 0)
430 if (!filter.Equals (entry))
433 if ((restrictions & BindingRestriction.DeclaredOnly) != 0 && container.IsInterface && entry.DeclaringType != container)
440 if ((restrictions & BindingRestriction.DeclaredOnly) != 0)
443 container = container.BaseType;
444 } while (container != null);
446 var tps = top_container as TypeParameterSpec;
447 if (tps != null && tps.InterfaceCache != null) {
448 if (tps.InterfaceCache.member_hash.TryGetValue (filter.Name, out applicable)) {
449 for (int i = applicable.Count - 1; i >= 0; i--) {
450 var entry = applicable [i];
452 if ((restrictions & BindingRestriction.NoAccessors) != 0 && entry.IsAccessor)
455 if ((restrictions & BindingRestriction.OverrideOnly) != 0 && (entry.Modifiers & Modifiers.OVERRIDE) == 0)
458 if (!filter.Equals (entry))
470 // A special method to work with member lookup only. It returns a list of all members named @name
471 // starting from @container. It's very performance sensitive
473 // declaredOnlyClass cannot be used interfaces. Manual filtering is required because names are
476 public static IList<MemberSpec> FindMembers (TypeSpec container, string name, bool declaredOnlyClass)
479 IList<MemberSpec> applicable;
481 if (container.MemberCache.member_hash.TryGetValue (name, out applicable) || declaredOnlyClass)
484 container = container.BaseType;
485 } while (container != null);
490 public static IList<MemberSpec> FindInterfaceMembers (TypeParameterSpec typeParameter, string name)
492 if (typeParameter.InterfaceCache != null) {
493 IList<MemberSpec> applicable;
494 typeParameter.InterfaceCache.member_hash.TryGetValue (name, out applicable);
502 // Finds the nested type in container
504 public static TypeSpec FindNestedType (TypeSpec container, string name, int arity, bool declaredOnlyClass)
506 IList<MemberSpec> applicable;
507 TypeSpec best_match = null;
509 #if !FULL_AOT_RUNTIME
510 // TODO: Don't know how to handle this yet
511 // When resolving base type of nested type, parent type must have
512 // base type resolved to scan full hierarchy correctly
513 // Similarly MemberCacheTypes will inflate BaseType and Interfaces
514 // based on type definition
515 var tc = container.MemberDefinition as TypeContainer;
517 tc.DefineContainer ();
520 if (container.MemberCacheTypes.member_hash.TryGetValue (name, out applicable)) {
521 for (int i = applicable.Count - 1; i >= 0; i--) {
522 var entry = applicable[i];
523 if ((entry.Kind & MemberKind.NestedMask) == 0)
526 var ts = (TypeSpec) entry;
527 if (arity == ts.Arity)
531 if (best_match == null) {
533 } else if (System.Math.Abs (ts.Arity + arity) < System.Math.Abs (best_match.Arity + arity)) {
540 container = container.BaseType;
541 } while (container != null && !declaredOnlyClass);
547 // Looks for extension methods with defined name and extension type
549 public List<MethodSpec> FindExtensionMethods (IMemberContext invocationContext, string name, int arity)
551 IList<MemberSpec> entries;
552 if (!member_hash.TryGetValue (name, out entries))
555 List<MethodSpec> candidates = null;
556 foreach (var entry in entries) {
557 if (entry.Kind != MemberKind.Method || (arity > 0 && entry.Arity != arity))
560 var ms = (MethodSpec) entry;
561 if (!ms.IsExtensionMethod)
564 if (!ms.IsAccessible (invocationContext))
568 // Extension methods cannot be nested hence checking parent is enough
570 if ((ms.DeclaringType.Modifiers & Modifiers.INTERNAL) != 0 && !ms.DeclaringType.MemberDefinition.IsInternalAsPublic (invocationContext.Module.DeclaringAssembly))
573 if (candidates == null)
574 candidates = new List<MethodSpec> ();
582 // Returns base members of @member member if no exact match is found @bestCandidate returns
585 public static MemberSpec FindBaseMember (MemberCore member, out MemberSpec bestCandidate, ref bool overrides)
587 bestCandidate = null;
588 var container = member.Parent.PartialContainer.Definition;
589 if (!container.IsInterface) {
590 container = container.BaseType;
592 // It can happen for a user definition of System.Object
593 if (container == null)
597 string name = GetLookupName (member);
598 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : null;
600 var mkind = GetMemberCoreKind (member);
601 bool member_with_accessors = mkind == MemberKind.Indexer || mkind == MemberKind.Property;
603 IList<MemberSpec> applicable;
604 MemberSpec ambig_candidate = null;
607 if (container.MemberCache.member_hash.TryGetValue (name, out applicable)) {
608 for (int i = 0; i < applicable.Count; ++i) {
609 var entry = applicable [i];
611 if ((entry.Modifiers & Modifiers.PUBLIC) == 0 && !entry.IsAccessible (member))
615 // Isn't the member of same kind ?
617 if ((entry.Kind & ~MemberKind.Destructor & mkind & MemberKind.MaskType) == 0) {
618 // Destructors are ignored as they cannot be overridden by user
619 if ((entry.Kind & MemberKind.Destructor) != 0)
622 // A method with different arity does not hide base member
623 if (mkind != MemberKind.Method && member.MemberName.Arity != entry.Arity)
626 bestCandidate = entry;
631 // Same kind of different arity is valid
633 if (member.MemberName.Arity != entry.Arity) {
637 if ((entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
638 if (entry.IsAccessor != member is AbstractPropertyEventMethod)
641 var pm = entry as IParametersMember;
642 if (!TypeSpecComparer.Override.IsEqual (pm.Parameters, member_param))
647 // Skip override for member with accessors. It may not fully implement the base member
648 // but keep flag we found an implementation in case the base member is abstract
650 if (member_with_accessors && ((entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.SEALED)) == Modifiers.OVERRIDE)) {
652 // Set candidate to override implementation to flag we found an implementation
659 // For members with parameters we can encounter an ambiguous candidates (they match exactly)
660 // because generic type parameters could be inflated into same types
662 if (ambig_candidate == null && (entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
663 bestCandidate = null;
664 ambig_candidate = entry;
668 bestCandidate = ambig_candidate;
673 if (container.IsInterface || ambig_candidate != null)
676 container = container.BaseType;
677 } while (container != null);
679 return ambig_candidate;
682 public static List<TypeSpec> GetDeclaredNestedTypes (TypeSpec container)
684 List<TypeSpec> found = null;
685 foreach (var entry in container.MemberCache.member_hash) {
686 foreach (var member in entry.Value) {
687 if ((member.Kind & MemberKind.NestedMask) == 0)
691 found = new List<TypeSpec> ();
693 found.Add ((TypeSpec)member);
701 // Returns inflated version of MemberSpec, it works similarly to
702 // SRE TypeBuilder.GetMethod
704 public static T GetMember<T> (TypeSpec container, T spec) where T : MemberSpec
706 IList<MemberSpec> applicable;
707 if (container.MemberCache.member_hash.TryGetValue (GetLookupName (spec), out applicable)) {
708 for (int i = applicable.Count - 1; i >= 0; i--) {
709 var entry = applicable[i];
710 if (entry.MemberDefinition == spec.MemberDefinition)
715 throw new InternalErrorException ("Missing member `{0}' on inflated type `{1}'",
716 spec.GetSignatureForError (), container.GetSignatureForError ());
719 static MemberKind GetMemberCoreKind (MemberCore member)
721 if (member is FieldBase)
722 return MemberKind.Field;
723 if (member is Indexer)
724 return MemberKind.Indexer;
726 return MemberKind.Class;
727 if (member is Struct)
728 return MemberKind.Struct;
729 if (member is Destructor)
730 return MemberKind.Destructor;
731 if (member is Method)
732 return MemberKind.Method;
733 if (member is Property)
734 return MemberKind.Property;
735 if (member is EventField)
736 return MemberKind.Event;
737 if (member is Interface)
738 return MemberKind.Interface;
739 if (member is EventProperty)
740 return MemberKind.Event;
741 if (member is Delegate)
742 return MemberKind.Delegate;
744 return MemberKind.Enum;
746 throw new NotImplementedException (member.GetType ().ToString ());
749 public static List<FieldSpec> GetAllFieldsForDefiniteAssignment (TypeSpec container, IMemberContext context)
751 List<FieldSpec> fields = null;
752 bool imported = container.MemberDefinition.IsImported;
753 foreach (var entry in container.MemberCache.member_hash) {
754 foreach (var name_entry in entry.Value) {
755 if (name_entry.Kind != MemberKind.Field)
758 if ((name_entry.Modifiers & Modifiers.STATIC) != 0)
762 // Fixed size buffers are not subject to definite assignment checking
764 if (name_entry is FixedFieldSpec || name_entry is ConstSpec)
767 var fs = (FieldSpec) name_entry;
768 if (imported && ShouldIgnoreFieldForDefiniteAssignment (fs, context))
771 //if ((fs.Modifiers & (Modifiers.BACKING_FIELD) != 0)
775 fields = new List<FieldSpec> ();
782 return fields ?? new List<FieldSpec> (0);
785 static bool ShouldIgnoreFieldForDefiniteAssignment (FieldSpec fs, IMemberContext context)
788 // LAMESPEC: This mimics csc quirk where definitive assignment is not done
789 // for all kinds of imported non-public struct fields
791 var mod = fs.Modifiers;
792 if ((mod & Modifiers.PRIVATE) == 0 && ((mod & Modifiers.INTERNAL) != 0 && fs.DeclaringType.MemberDefinition.IsInternalAsPublic (context.Module.DeclaringAssembly)))
796 // Ignore reference type fields except when type is an array or type parameter
798 var type = fs.MemberType;
800 case MemberKind.ArrayType:
801 case MemberKind.TypeParameter:
804 return TypeSpec.IsReferenceType (type);
808 public static IList<MemberSpec> GetCompletitionMembers (IMemberContext ctx, TypeSpec container, string name)
810 var matches = new List<MemberSpec> ();
811 foreach (var entry in container.MemberCache.member_hash) {
812 foreach (var name_entry in entry.Value) {
813 if (name_entry.IsAccessor)
816 if ((name_entry.Kind & (MemberKind.Constructor | MemberKind.Destructor | MemberKind.Operator)) != 0)
819 if (!name_entry.IsAccessible (ctx))
822 if (name == null || name_entry.Name.StartsWith (name)) {
823 matches.Add (name_entry);
832 // Returns members of @iface only, base members are ignored
834 public static List<MethodSpec> GetInterfaceMethods (TypeSpec iface)
837 // MemberCache flatten interfaces, therefore in cases like this one
839 // interface IA : IB {}
840 // interface IB { void Foo () }
842 // we would return Foo inside IA which is not expected in this case
844 var methods = new List<MethodSpec> ();
845 foreach (var entry in iface.MemberCache.member_hash.Values) {
846 foreach (var name_entry in entry) {
847 if (iface == name_entry.DeclaringType) {
848 if (name_entry.Kind == MemberKind.Method) {
849 methods.Add ((MethodSpec) name_entry);
859 // Returns all not implememted abstract members inside abstract type
860 // NOTE: Returned list is shared and must not be modified
862 public static IList<MethodSpec> GetNotImplementedAbstractMethods (TypeSpec type)
864 if (type.MemberCache.missing_abstract != null)
865 return type.MemberCache.missing_abstract;
867 var abstract_methods = new List<MethodSpec> ();
868 List<TypeSpec> hierarchy = null;
871 // Stage 1: top-to-bottom scan for abstract members
873 var abstract_type = type;
875 foreach (var entry in abstract_type.MemberCache.member_hash) {
876 foreach (var name_entry in entry.Value) {
877 if ((name_entry.Modifiers & Modifiers.ABSTRACT) == 0)
880 var ms = name_entry as MethodSpec;
884 abstract_methods.Add (ms);
888 var base_type = abstract_type.BaseType;
889 if (!base_type.IsAbstract)
892 if (hierarchy == null)
893 hierarchy = new List<TypeSpec> ();
895 hierarchy.Add (abstract_type);
896 abstract_type = base_type;
899 int not_implemented_count = abstract_methods.Count;
900 if (not_implemented_count == 0 || hierarchy == null) {
901 type.MemberCache.missing_abstract = abstract_methods;
902 return type.MemberCache.missing_abstract;
906 // Stage 2: Remove already implemented methods
908 foreach (var type_up in hierarchy) {
909 var members = type_up.MemberCache.member_hash;
910 if (members.Count == 0)
913 for (int i = 0; i < abstract_methods.Count; ++i) {
914 var candidate = abstract_methods [i];
915 if (candidate == null)
918 IList<MemberSpec> applicable;
919 if (!members.TryGetValue (candidate.Name, out applicable))
922 var filter = new MemberFilter (candidate);
923 foreach (var item in applicable) {
924 if ((item.Modifiers & (Modifiers.OVERRIDE | Modifiers.VIRTUAL)) == 0)
928 // Abstract override does not override anything
930 if ((item.Modifiers & Modifiers.ABSTRACT) != 0)
933 if (filter.Equals (item)) {
934 --not_implemented_count;
935 abstract_methods [i] = null;
942 if (not_implemented_count == abstract_methods.Count) {
943 type.MemberCache.missing_abstract = abstract_methods;
944 return type.MemberCache.missing_abstract;
947 var not_implemented = new MethodSpec[not_implemented_count];
949 foreach (var m in abstract_methods) {
953 not_implemented[counter++] = m;
956 type.MemberCache.missing_abstract = not_implemented;
957 return type.MemberCache.missing_abstract;
960 static string GetLookupName (MemberSpec ms)
962 if (ms.Kind == MemberKind.Indexer)
963 return IndexerNameAlias;
965 if (ms.Kind == MemberKind.Constructor) {
967 return Constructor.TypeConstructorName;
969 return Constructor.ConstructorName;
975 static string GetLookupName (MemberCore mc)
978 return IndexerNameAlias;
980 if (mc is Constructor)
981 return mc.IsStatic ? Constructor.TypeConstructorName : Constructor.ConstructorName;
983 return mc.MemberName.Name;
987 // Returns all operators declared on container and its base types (until declaredOnly is used)
989 public static IList<MemberSpec> GetUserOperator (TypeSpec container, Operator.OpType op, bool declaredOnly)
991 IList<MemberSpec> found = null;
992 bool shared_list = true;
993 IList<MemberSpec> applicable;
995 var mc = container.MemberCache;
997 if (((op == Operator.OpType.Implicit || op == Operator.OpType.Explicit) && (mc.state & StateFlags.HasConversionOperator) != 0) ||
998 (mc.state & StateFlags.HasUserOperator) != 0) {
1000 if (mc.member_hash.TryGetValue (Operator.GetMetadataName (op), out applicable)) {
1002 for (i = 0; i < applicable.Count; ++i) {
1003 if (applicable[i].Kind != MemberKind.Operator) {
1009 // Handles very rare case where a method with same name as operator (op_xxxx) exists
1010 // and we have to resize the applicable list
1012 if (i != applicable.Count) {
1013 for (i = 0; i < applicable.Count; ++i) {
1014 if (applicable[i].Kind != MemberKind.Operator) {
1018 if (found == null) {
1019 found = new List<MemberSpec> ();
1020 found.Add (applicable[i]);
1022 List<MemberSpec> prev;
1024 shared_list = false;
1025 prev = new List<MemberSpec> (found.Count + 1);
1026 prev.AddRange (found);
1029 prev = (List<MemberSpec>) found;
1032 prev.Add (applicable[i]);
1036 if (found == null) {
1040 List<MemberSpec> merged;
1042 shared_list = false;
1043 merged = new List<MemberSpec> (found.Count + applicable.Count);
1044 merged.AddRange (found);
1047 merged = (List<MemberSpec>) found;
1050 merged.AddRange (applicable);
1056 // BaseType call can be expensive
1060 container = container.BaseType;
1061 } while (container != null);
1067 // Inflates all member cache nested types
1069 public void InflateTypes (MemberCache inflated_cache, TypeParameterInflator inflator)
1071 foreach (var item in member_hash) {
1072 IList<MemberSpec> inflated_members = null;
1073 for (int i = 0; i < item.Value.Count; ++i ) {
1074 var member = item.Value[i];
1076 // FIXME: When inflating members refering nested types before they are inflated
1080 if ((member.Kind & MemberKind.NestedMask) != 0 &&
1081 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
1082 if (inflated_members == null) {
1083 inflated_members = new MemberSpec[item.Value.Count];
1084 inflated_cache.member_hash.Add (item.Key, inflated_members);
1087 inflated_members [i] = member.InflateMember (inflator);
1094 // Inflates all open type members, requires InflateTypes to be called before
1096 public void InflateMembers (MemberCache cacheToInflate, TypeSpec inflatedType, TypeParameterInflator inflator)
1098 var inflated_member_hash = cacheToInflate.member_hash;
1099 Dictionary<MemberSpec, MethodSpec> accessor_relation = null;
1100 List<MemberSpec> accessor_members = null;
1102 // Copy member specific flags when all members were added
1103 cacheToInflate.state = state;
1105 foreach (var item in member_hash) {
1106 var members = item.Value;
1107 IList<MemberSpec> inflated_members = null;
1108 for (int i = 0; i < members.Count; ++i ) {
1109 var member = members[i];
1112 // All nested types have been inflated earlier except for
1113 // compiler types which are created later and could miss InflateTypes
1115 if ((member.Kind & MemberKind.NestedMask) != 0 &&
1116 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
1117 if (inflated_members == null)
1118 inflated_members = inflated_member_hash[item.Key];
1124 // Clone the container first
1126 if (inflated_members == null) {
1127 inflated_members = new MemberSpec [item.Value.Count];
1128 inflated_member_hash.Add (item.Key, inflated_members);
1131 var local_inflator = inflator;
1133 if (member.DeclaringType != inflatedType) {
1135 // Don't inflate top-level non-generic interface members
1136 // merged into generic interface
1138 if (!member.DeclaringType.IsGeneric && !member.DeclaringType.IsNested) {
1139 inflated_members [i] = member;
1144 // Needed when inflating flatten interfaces. It inflates
1145 // container type only, type parameters are already done
1147 // Handles cases like:
1149 // interface I<T> {}
1150 // interface I<U, V> : I<U> {}
1152 // class C: I<int, bool> {}
1154 var inflated_parent = inflator.Inflate (member.DeclaringType);
1155 if (inflated_parent != inflator.TypeInstance)
1156 local_inflator = new TypeParameterInflator (inflator, inflated_parent);
1160 // Inflate every member, its parent is now different
1162 var inflated = member.InflateMember (local_inflator);
1163 inflated_members [i] = inflated;
1165 if (member is PropertySpec || member is EventSpec) {
1166 if (accessor_members == null)
1167 accessor_members = new List<MemberSpec> ();
1169 accessor_members.Add (inflated);
1173 if (member.IsAccessor) {
1174 if (accessor_relation == null)
1175 accessor_relation = new Dictionary<MemberSpec, MethodSpec> ();
1176 accessor_relation.Add (member, (MethodSpec) inflated);
1181 if (accessor_members != null) {
1182 foreach (var member in accessor_members) {
1183 var prop = member as PropertySpec;
1185 if (prop.Get != null)
1186 prop.Get = accessor_relation[prop.Get];
1187 if (prop.Set != null)
1188 prop.Set = accessor_relation[prop.Set];
1193 var ev = (EventSpec) member;
1194 ev.AccessorAdd = accessor_relation[ev.AccessorAdd];
1195 ev.AccessorRemove = accessor_relation[ev.AccessorRemove];
1201 // Removes hidden base members of an interface. For compiled interfaces we cannot
1202 // do name filtering during Add (as we do for import) because we need all base
1203 // names to be valid during type definition.
1204 // Add replaces hidden base member with current one which means any name collision
1205 // (CS0108) of non-first name would be unnoticed because the name was replaced
1206 // with the one from compiled type
1208 public void RemoveHiddenMembers (TypeSpec container)
1210 foreach (var entry in member_hash) {
1211 var values = entry.Value;
1213 int container_members_start_at = 0;
1214 while (values[container_members_start_at].DeclaringType != container && ++container_members_start_at < entry.Value.Count);
1216 if (container_members_start_at == 0 || container_members_start_at == values.Count)
1219 for (int i = 0; i < container_members_start_at; ++i) {
1220 var member = values[i];
1222 if (!container.ImplementsInterface (member.DeclaringType, false))
1225 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : ParametersCompiled.EmptyReadOnlyParameters;
1227 for (int ii = container_members_start_at; ii < values.Count; ++ii) {
1228 var container_entry = values[ii];
1230 if (container_entry.Arity != member.Arity)
1233 if (container_entry is IParametersMember) {
1234 if (!TypeSpecComparer.Override.IsEqual (((IParametersMember) container_entry).Parameters, member_param))
1238 values.RemoveAt (i);
1239 --container_members_start_at;
1248 // Checks all appropriate container members for CLS compliance
1250 public void VerifyClsCompliance (TypeSpec container, Report report)
1252 if (locase_members != null)
1255 if (container.BaseType == null) {
1256 locase_members = new Dictionary<string, MemberSpec[]> (member_hash.Count); // StringComparer.OrdinalIgnoreCase);
1258 var btype = container.BaseType.GetDefinition ();
1259 btype.MemberCache.VerifyClsCompliance (btype, report);
1260 locase_members = new Dictionary<string, MemberSpec[]> (btype.MemberCache.locase_members); //, StringComparer.OrdinalIgnoreCase);
1263 var is_imported_type = container.MemberDefinition.IsImported;
1264 foreach (var entry in container.MemberCache.member_hash) {
1265 for (int i = 0; i < entry.Value.Count; ++i ) {
1266 var name_entry = entry.Value[i];
1267 if ((name_entry.Modifiers & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
1270 if ((name_entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.COMPILER_GENERATED)) != 0)
1273 if ((name_entry.Kind & MemberKind.MaskType) == 0)
1276 if (name_entry.MemberDefinition.CLSAttributeValue == false)
1279 IParametersMember p_a = null;
1280 if (!is_imported_type) {
1281 p_a = name_entry as IParametersMember;
1282 if (p_a != null && !name_entry.IsAccessor) {
1283 var p_a_pd = p_a.Parameters;
1285 // Check differing overloads in @container
1287 for (int ii = i + 1; ii < entry.Value.Count; ++ii) {
1288 var checked_entry = entry.Value[ii];
1289 IParametersMember p_b = checked_entry as IParametersMember;
1293 if (p_a_pd.Count != p_b.Parameters.Count)
1296 if (checked_entry.IsAccessor)
1299 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1301 ReportOverloadedMethodClsDifference (name_entry, checked_entry, res, report);
1307 if (i > 0 || name_entry.Kind == MemberKind.Constructor || name_entry.Kind == MemberKind.Indexer)
1310 var name_entry_locase = name_entry.Name.ToLowerInvariant ();
1313 if (!locase_members.TryGetValue (name_entry_locase, out found)) {
1314 found = new MemberSpec[] { name_entry };
1315 locase_members.Add (name_entry_locase, found);
1317 bool same_names_only = true;
1318 foreach (var f in found) {
1319 if (f.Name == name_entry.Name) {
1321 IParametersMember p_b = f as IParametersMember;
1325 if (p_a.Parameters.Count != p_b.Parameters.Count)
1331 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1333 ReportOverloadedMethodClsDifference (f, name_entry, res, report);
1340 same_names_only = false;
1341 if (!is_imported_type) {
1342 var last = GetLaterDefinedMember (f, name_entry);
1343 if (last == f.MemberDefinition) {
1344 report.SymbolRelatedToPreviousError (name_entry);
1346 report.SymbolRelatedToPreviousError (f);
1349 report.Warning (3005, 1, last.Location,
1350 "Identifier `{0}' differing only in case is not CLS-compliant", last.GetSignatureForError ());
1354 if (!same_names_only) {
1355 Array.Resize (ref found, found.Length + 1);
1356 found[found.Length - 1] = name_entry;
1357 locase_members[name_entry_locase] = found;
1365 // Local report helper to issue correctly ordered members stored in hashtable
1367 static MemberCore GetLaterDefinedMember (MemberSpec a, MemberSpec b)
1369 var mc_a = a.MemberDefinition as MemberCore;
1370 var mc_b = b.MemberDefinition as MemberCore;
1377 if (a.DeclaringType.MemberDefinition != b.DeclaringType.MemberDefinition)
1380 if (mc_a.Location.File != mc_b.Location.File)
1383 return mc_b.Location.Row > mc_a.Location.Row ? mc_b : mc_a;
1386 static void ReportOverloadedMethodClsDifference (MemberSpec a, MemberSpec b, int res, Report report)
1388 var last = GetLaterDefinedMember (a, b);
1389 if (last == a.MemberDefinition) {
1390 report.SymbolRelatedToPreviousError (b);
1392 report.SymbolRelatedToPreviousError (a);
1395 if ((res & 1) != 0) {
1396 report.Warning (3006, 1, last.Location,
1397 "Overloaded method `{0}' differing only in ref or out, or in array rank, is not CLS-compliant",
1398 last.GetSignatureForError ());
1401 if ((res & 2) != 0) {
1402 report.Warning (3007, 1, last.Location,
1403 "Overloaded method `{0}' differing only by unnamed array types is not CLS-compliant",
1404 last.GetSignatureForError ());
1408 public bool CheckExistingMembersOverloads (MemberCore member, AParametersCollection parameters)
1410 var name = GetLookupName (member);
1411 var imb = member as InterfaceMemberBase;
1412 if (imb != null && imb.IsExplicitImpl) {
1413 name = imb.GetFullName (name);
1416 return CheckExistingMembersOverloads (member, name, parameters);
1419 public bool CheckExistingMembersOverloads (MemberCore member, string name, AParametersCollection parameters)
1421 IList<MemberSpec> entries;
1422 if (!member_hash.TryGetValue (name, out entries))
1425 var Report = member.Compiler.Report;
1427 int method_param_count = parameters.Count;
1428 for (int i = entries.Count - 1; i >= 0; --i) {
1429 var ce = entries[i];
1430 var pm = ce as IParametersMember;
1431 var pd = pm == null ? ParametersCompiled.EmptyReadOnlyParameters : pm.Parameters;
1432 if (pd.Count != method_param_count)
1435 if (ce.Arity != member.MemberName.Arity)
1438 // Ignore merged interface members
1439 if (member.Parent.PartialContainer != ce.DeclaringType.MemberDefinition)
1442 var p_types = pd.Types;
1443 if (method_param_count > 0) {
1444 int ii = method_param_count - 1;
1445 TypeSpec type_a, type_b;
1447 type_a = parameters.Types [ii];
1448 type_b = p_types [ii];
1450 var a_byref = (pd.FixedParameters[ii].ModFlags & Parameter.Modifier.RefOutMask) != 0;
1451 var b_byref = (parameters.FixedParameters[ii].ModFlags & Parameter.Modifier.RefOutMask) != 0;
1453 if (a_byref != b_byref)
1456 } while (TypeSpecComparer.Override.IsEqual (type_a, type_b) && ii-- != 0);
1462 // Operators can differ in return type only
1464 if (member is Operator && ce.Kind == MemberKind.Operator && ((MethodSpec) ce).ReturnType != ((Operator) member).ReturnType)
1468 // Report difference in parameter modifiers only
1470 if (pd != null && member is MethodCore) {
1471 ii = method_param_count;
1473 (parameters.FixedParameters[ii].ModFlags & Parameter.Modifier.ModifierMask) ==
1474 (pd.FixedParameters[ii].ModFlags & Parameter.Modifier.ModifierMask) &&
1475 parameters.ExtensionMethodType == pd.ExtensionMethodType) ;
1478 var mc = ce as MethodSpec;
1479 member.Compiler.Report.SymbolRelatedToPreviousError (ce);
1480 if ((member.ModFlags & Modifiers.PARTIAL) != 0 && (mc.Modifiers & Modifiers.PARTIAL) != 0) {
1481 if (parameters.HasParams || pd.HasParams) {
1482 Report.Error (758, member.Location,
1483 "A partial method declaration and partial method implementation cannot differ on use of `params' modifier");
1485 Report.Error (755, member.Location,
1486 "A partial method declaration and partial method implementation must be both an extension method or neither");
1488 } else if (member is Constructor) {
1489 Report.Error (851, member.Location,
1490 "Overloaded contructor `{0}' cannot differ on use of parameter modifiers only",
1491 member.GetSignatureForError ());
1493 Report.Error (663, member.Location,
1494 "Overloaded method `{0}' cannot differ on use of parameter modifiers only",
1495 member.GetSignatureForError ());
1502 if ((ce.Kind & MemberKind.Method) != 0) {
1503 Method method_a = member as Method;
1504 Method method_b = ce.MemberDefinition as Method;
1505 if (method_a != null && method_b != null && (method_a.ModFlags & method_b.ModFlags & Modifiers.PARTIAL) != 0) {
1506 const Modifiers partial_modifiers = Modifiers.STATIC | Modifiers.UNSAFE;
1507 if (method_a.IsPartialDefinition == method_b.IsPartialImplementation) {
1508 if ((method_a.ModFlags & partial_modifiers) == (method_b.ModFlags & partial_modifiers) ||
1509 method_a.Parent.IsUnsafe && method_b.Parent.IsUnsafe) {
1510 if (method_a.IsPartialImplementation) {
1511 method_a.SetPartialDefinition (method_b);
1512 if (entries.Count == 1)
1513 member_hash.Remove (name);
1515 entries.RemoveAt (i);
1517 method_b.SetPartialDefinition (method_a);
1518 method_a.caching_flags |= MemberCore.Flags.PartialDefinitionExists;
1523 if (method_a.IsStatic != method_b.IsStatic) {
1524 Report.SymbolRelatedToPreviousError (ce);
1525 Report.Error (763, member.Location,
1526 "A partial method declaration and partial method implementation must be both `static' or neither");
1529 if ((method_a.ModFlags & Modifiers.UNSAFE) != (method_b.ModFlags & Modifiers.UNSAFE)) {
1530 Report.SymbolRelatedToPreviousError (ce);
1531 Report.Error (764, member.Location,
1532 "A partial method declaration and partial method implementation must be both `unsafe' or neither");
1538 Report.SymbolRelatedToPreviousError (ce);
1539 if (method_a.IsPartialDefinition) {
1540 Report.Error (756, member.Location, "A partial method `{0}' declaration is already defined",
1541 member.GetSignatureForError ());
1544 Report.Error (757, member.Location, "A partial method `{0}' implementation is already defined",
1545 member.GetSignatureForError ());
1549 Report.SymbolRelatedToPreviousError (ce);
1551 bool is_reserved_a = member is AbstractPropertyEventMethod || member is Operator;
1552 bool is_reserved_b = ((MethodSpec) ce).IsReservedMethod;
1554 if (is_reserved_a || is_reserved_b) {
1555 Report.Error (82, member.Location, "A member `{0}' is already reserved",
1557 ce.GetSignatureForError () :
1558 member.GetSignatureForError ());
1562 Report.SymbolRelatedToPreviousError (ce);
1565 if (member is Operator && ce.Kind == MemberKind.Operator) {
1566 Report.Error (557, member.Location, "Duplicate user-defined conversion in type `{0}'",
1567 member.Parent.GetSignatureForError ());
1571 Report.Error (111, member.Location,
1572 "A member `{0}' is already defined. Rename this member or use different parameter types",
1573 member.GetSignatureForError ());