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
15 using System.Collections.Generic;
17 namespace Mono.CSharp {
20 public enum MemberKind
36 TypeParameter = 1 << 16,
39 PointerType = 1 << 20,
40 InternalCompilerType = 1 << 21,
41 MissingType = 1 << 22,
44 NestedMask = Class | Struct | Delegate | Enum | Interface,
45 GenericMask = Method | Class | Struct | Delegate | Interface,
46 MaskType = Constructor | Event | Field | Method | Property | Indexer | Operator | Destructor | NestedMask
50 public enum BindingRestriction
54 // Inspect only queried type members
55 DeclaredOnly = 1 << 1,
58 InstanceOnly = 1 << 2,
62 // Member has to be override
66 public struct MemberFilter : IEquatable<MemberSpec>
68 public readonly string Name;
69 public readonly MemberKind Kind;
70 public readonly AParametersCollection Parameters;
71 public readonly TypeSpec MemberType;
72 public readonly int Arity; // -1 to ignore the check
74 private MemberFilter (string name, MemberKind kind)
83 public MemberFilter (MethodSpec m)
86 Kind = MemberKind.Method;
87 Parameters = m.Parameters;
88 MemberType = m.ReturnType;
92 public MemberFilter (string name, int arity, MemberKind kind, AParametersCollection param, TypeSpec type)
101 public static MemberFilter Constructor (AParametersCollection param)
103 return new MemberFilter (Mono.CSharp.Constructor.ConstructorName, 0, MemberKind.Constructor, param, null);
106 public static MemberFilter Property (string name, TypeSpec type)
108 return new MemberFilter (name, 0, MemberKind.Property, null, type);
111 public static MemberFilter Field (string name, TypeSpec type)
113 return new MemberFilter (name, 0, MemberKind.Field, null, type);
116 public static MemberFilter Method (string name, int arity, AParametersCollection param, TypeSpec type)
118 return new MemberFilter (name, arity, MemberKind.Method, param, type);
121 #region IEquatable<MemberSpec> Members
123 public bool Equals (MemberSpec other)
125 // Is the member of the correct type ?
126 // TODO: Isn't this redundant ?
127 if ((other.Kind & Kind & MemberKind.MaskType) == 0)
130 // Check arity when not disabled
131 if (Arity >= 0 && Arity != other.Arity)
134 if (Parameters != null) {
135 if (other is IParametersMember) {
136 var other_param = ((IParametersMember) other).Parameters;
137 if (!TypeSpecComparer.Override.IsEqual (Parameters, other_param))
144 if (MemberType != null) {
145 if (other is IInterfaceMemberSpec) {
146 var other_type = ((IInterfaceMemberSpec) other).MemberType;
147 if (!TypeSpecComparer.Override.IsEqual (other_type, MemberType))
161 // The MemberCache is the main members container used by compiler. It contains
162 // all members imported or defined during compilation using on demand filling
163 // process. Inflated containers are also using MemberCache to make inflated
164 // members look like normal definition.
166 // All of the methods are performance and memory sensitive as the MemberCache
167 // is the underlying engine of all member based operations.
169 public class MemberCache
174 HasConversionOperator = 1 << 1,
175 HasUserOperator = 1 << 2
178 readonly Dictionary<string, IList<MemberSpec>> member_hash;
179 Dictionary<string, MemberSpec[]> locase_members;
180 IList<MethodSpec> missing_abstract;
181 StateFlags state; // TODO: Move to TypeSpec or ITypeDefinition
183 public static readonly string IndexerNameAlias = "<this>";
185 public static readonly MemberCache Empty = new MemberCache (0);
187 public MemberCache ()
192 public MemberCache (int capacity)
194 member_hash = new Dictionary<string, IList<MemberSpec>> (capacity);
197 public MemberCache (MemberCache cache)
198 : this (cache.member_hash.Count)
200 this.state = cache.state;
204 // Creates a new MemberCache for the given `container'.
206 public MemberCache (TypeContainer container)
207 : this () // TODO: Optimize the size
212 // For cases where we need to union cache members
214 public void AddBaseType (TypeSpec baseType)
216 var cache = baseType.MemberCache;
218 IList<MemberSpec> list;
219 foreach (var entry in cache.member_hash) {
220 if (!member_hash.TryGetValue (entry.Key, out list)) {
221 if (entry.Value.Count == 1) {
224 list = new List<MemberSpec> (entry.Value);
227 member_hash.Add (entry.Key, list);
231 foreach (var ce in entry.Value) {
232 if (list.Contains (ce))
235 if (list is MemberSpec[]) {
236 list = new List<MemberSpec> () { list [0] };
237 member_hash[entry.Key] = list;
246 // Member-cache does not contain base members but it does
247 // contain all base interface members, so the Lookup code
248 // can use simple inheritance rules.
250 public void AddInterface (TypeSpec iface)
252 var cache = iface.MemberCache;
254 IList<MemberSpec> list;
255 foreach (var entry in cache.member_hash) {
256 if (!member_hash.TryGetValue (entry.Key, out list)) {
257 if (entry.Value.Count == 1) {
260 list = new List<MemberSpec> (entry.Value);
263 member_hash.Add (entry.Key, list);
267 foreach (var ce in entry.Value) {
268 if (list.Contains (ce))
271 if (AddInterfaceMember (ce, ref list))
272 member_hash[entry.Key] = list;
276 // Add also all base interfaces
277 if (iface.Interfaces != null) {
278 foreach (var base_iface in iface.Interfaces)
279 AddInterface (base_iface);
283 public void AddMember (InterfaceMemberBase imb, string exlicitName, MemberSpec ms)
285 // Explicit names cannot be looked-up but can be used for
286 // collision checking (no name mangling needed)
287 if (imb.IsExplicitImpl)
288 AddMember (exlicitName, ms, false);
294 // Add non-explicit member to member cache
296 public void AddMember (MemberSpec ms)
298 AddMember (GetLookupName (ms), ms, false);
301 void AddMember (string name, MemberSpec member, bool removeHiddenMembers)
303 if (member.Kind == MemberKind.Operator) {
304 var dt = member.DeclaringType;
305 switch (dt.BuiltinType) {
306 case BuiltinTypeSpec.Type.String:
307 case BuiltinTypeSpec.Type.Delegate:
308 case BuiltinTypeSpec.Type.MulticastDelegate:
309 // Some core types have user operators but they cannot be used as normal
310 // user operators as they are predefined and therefore having different
311 // rules (e.g. binary operators) by not setting the flag we hide them for
313 // TODO: Should I do this for all core types ?
316 if (name == Operator.GetMetadataName (Operator.OpType.Implicit) || name == Operator.GetMetadataName (Operator.OpType.Explicit)) {
317 state |= StateFlags.HasConversionOperator;
319 state |= StateFlags.HasUserOperator;
326 IList<MemberSpec> list;
327 if (!member_hash.TryGetValue (name, out list)) {
328 member_hash.Add (name, new MemberSpec[] { member });
332 if (removeHiddenMembers && member.DeclaringType.IsInterface) {
333 if (AddInterfaceMember (member, ref list))
334 member_hash[name] = list;
336 if (list.Count == 1) {
337 list = new List<MemberSpec> () { list[0] };
338 member_hash[name] = list;
345 public void AddMemberImported (MemberSpec ms)
347 AddMember (GetLookupName (ms), ms, true);
351 // Ignores any base interface member which can be hidden
354 static bool AddInterfaceMember (MemberSpec member, ref IList<MemberSpec> existing)
356 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : ParametersCompiled.EmptyReadOnlyParameters;
359 // interface IA : IB { int Prop { set; } }
360 // interface IB { bool Prop { get; } }
362 // IB.Prop is never accessible from IA interface
364 for (int i = 0; i < existing.Count; ++i) {
365 var entry = existing[i];
367 if (entry.Arity != member.Arity)
370 if (entry is IParametersMember) {
371 var entry_param = ((IParametersMember) entry).Parameters;
372 if (!TypeSpecComparer.Override.IsEqual (entry_param, member_param))
376 if (member.DeclaringType.ImplementsInterface (entry.DeclaringType, false)) {
377 if (existing.Count == 1) {
378 existing = new MemberSpec[] { member };
382 existing.RemoveAt (i--);
386 if ((entry.DeclaringType == member.DeclaringType && entry.IsAccessor == member.IsAccessor) ||
387 entry.DeclaringType.ImplementsInterface (member.DeclaringType, false))
391 if (existing.Count == 1) {
392 existing = new List<MemberSpec> () { existing[0], member };
396 existing.Add (member);
400 public static MemberSpec FindMember (TypeSpec container, MemberFilter filter, BindingRestriction restrictions)
403 IList<MemberSpec> applicable;
404 if (container.MemberCache.member_hash.TryGetValue (filter.Name, out applicable)) {
405 // Start from the end because interface members are in reverse order
406 for (int i = applicable.Count - 1; i >= 0; i--) {
407 var entry = applicable [i];
409 if ((restrictions & BindingRestriction.InstanceOnly) != 0 && entry.IsStatic)
412 if ((restrictions & BindingRestriction.NoAccessors) != 0 && entry.IsAccessor)
415 if ((restrictions & BindingRestriction.OverrideOnly) != 0 && (entry.Modifiers & Modifiers.OVERRIDE) == 0)
418 if (!filter.Equals (entry))
421 if ((restrictions & BindingRestriction.DeclaredOnly) != 0 && container.IsInterface && entry.DeclaringType != container)
428 if ((restrictions & BindingRestriction.DeclaredOnly) != 0)
431 container = container.BaseType;
432 } while (container != null);
438 // A special method to work with member lookup only. It returns a list of all members named @name
439 // starting from @container. It's very performance sensitive
441 public static IList<MemberSpec> FindMembers (TypeSpec container, string name, bool declaredOnly)
443 IList<MemberSpec> applicable;
446 if (container.MemberCache.member_hash.TryGetValue (name, out applicable) || declaredOnly)
449 container = container.BaseType;
450 } while (container != null);
456 // Finds the nested type in container
458 public static TypeSpec FindNestedType (TypeSpec container, string name, int arity)
460 IList<MemberSpec> applicable;
461 TypeSpec best_match = null;
463 // TODO: Don't know how to handle this yet
464 // When resolving base type of nested type, parent type must have
465 // base type resolved to scan full hierarchy correctly
466 // Similarly MemberCacheTypes will inflate BaseType and Interfaces
467 // based on type definition
468 var tc = container.MemberDefinition as TypeContainer;
472 if (container.MemberCacheTypes.member_hash.TryGetValue (name, out applicable)) {
473 for (int i = applicable.Count - 1; i >= 0; i--) {
474 var entry = applicable[i];
475 if ((entry.Kind & MemberKind.NestedMask) == 0)
478 var ts = (TypeSpec) entry;
479 if (arity == ts.Arity)
483 if (best_match == null) {
485 } else if (System.Math.Abs (ts.Arity + arity) < System.Math.Abs (ts.Arity + arity)) {
492 container = container.BaseType;
493 } while (container != null);
499 // Looks for extension methods with defined name and extension type
501 public List<MethodSpec> FindExtensionMethods (IMemberContext invocationContext, TypeSpec extensionType, string name, int arity)
503 IList<MemberSpec> entries;
504 if (!member_hash.TryGetValue (name, out entries))
507 List<MethodSpec> candidates = null;
508 foreach (var entry in entries) {
509 if (entry.Kind != MemberKind.Method || (arity > 0 && entry.Arity != arity))
512 var ms = (MethodSpec) entry;
513 if (!ms.IsExtensionMethod)
516 if (!ms.IsAccessible (invocationContext))
520 // Extension methods cannot be nested hence checking parent is enough
522 if ((ms.DeclaringType.Modifiers & Modifiers.INTERNAL) != 0 && !ms.DeclaringType.MemberDefinition.IsInternalAsPublic (invocationContext.Module.DeclaringAssembly))
525 if (candidates == null)
526 candidates = new List<MethodSpec> ();
534 // Returns base members of @member member if no exact match is found @bestCandidate returns
537 public static MemberSpec FindBaseMember (MemberCore member, out MemberSpec bestCandidate, ref bool overrides)
539 bestCandidate = null;
540 var container = member.Parent.PartialContainer.Definition;
541 if (!container.IsInterface) {
542 container = container.BaseType;
544 // It can happen for a user definition of System.Object
545 if (container == null)
549 string name = GetLookupName (member);
550 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : null;
552 var mkind = GetMemberCoreKind (member);
553 bool member_with_accessors = mkind == MemberKind.Indexer || mkind == MemberKind.Property;
555 IList<MemberSpec> applicable;
556 MemberSpec ambig_candidate = null;
559 if (container.MemberCache.member_hash.TryGetValue (name, out applicable)) {
560 for (int i = 0; i < applicable.Count; ++i) {
561 var entry = applicable [i];
563 if ((entry.Modifiers & Modifiers.PRIVATE) != 0)
566 if ((entry.Modifiers & Modifiers.AccessibilityMask) == Modifiers.INTERNAL &&
567 !entry.DeclaringType.MemberDefinition.IsInternalAsPublic (member.Module.DeclaringAssembly))
571 // Isn't the member of same kind ?
573 if ((entry.Kind & ~MemberKind.Destructor & mkind & MemberKind.MaskType) == 0) {
574 // Destructors are ignored as they cannot be overridden by user
575 if ((entry.Kind & MemberKind.Destructor) != 0)
578 // A method with different arity does not hide base member
579 if (mkind != MemberKind.Method && member.MemberName.Arity != entry.Arity)
582 bestCandidate = entry;
587 // Same kind of different arity is valid
589 if (member.MemberName.Arity != entry.Arity) {
593 if ((entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
594 if (entry.IsAccessor != member is AbstractPropertyEventMethod)
597 var pm = entry as IParametersMember;
598 if (!TypeSpecComparer.Override.IsEqual (pm.Parameters, member_param))
603 // Skip override for member with accessors. It may not fully implement the base member
604 // but keep flag we found an implementation in case the base member is abstract
606 if (member_with_accessors && ((entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.SEALED)) == Modifiers.OVERRIDE)) {
608 // Set candidate to override implementation to flag we found an implementation
615 // For members with parameters we can encounter an ambiguous candidates (they match exactly)
616 // because generic type parameters could be inflated into same types
618 if (ambig_candidate == null && (entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
619 bestCandidate = null;
620 ambig_candidate = entry;
624 bestCandidate = ambig_candidate;
629 if (container.IsInterface || ambig_candidate != null)
632 container = container.BaseType;
633 } while (container != null);
635 return ambig_candidate;
639 // Returns inflated version of MemberSpec, it works similarly to
640 // SRE TypeBuilder.GetMethod
642 public static T GetMember<T> (TypeSpec container, T spec) where T : MemberSpec
644 IList<MemberSpec> applicable;
645 if (container.MemberCache.member_hash.TryGetValue (GetLookupName (spec), out applicable)) {
646 for (int i = applicable.Count - 1; i >= 0; i--) {
647 var entry = applicable[i];
648 if (entry.MemberDefinition == spec.MemberDefinition)
653 throw new InternalErrorException ("Missing member `{0}' on inflated type `{1}'",
654 spec.GetSignatureForError (), container.GetSignatureForError ());
657 static MemberKind GetMemberCoreKind (MemberCore member)
659 if (member is FieldBase)
660 return MemberKind.Field;
661 if (member is Indexer)
662 return MemberKind.Indexer;
664 return MemberKind.Class;
665 if (member is Struct)
666 return MemberKind.Struct;
667 if (member is Destructor)
668 return MemberKind.Destructor;
669 if (member is Method)
670 return MemberKind.Method;
671 if (member is Property)
672 return MemberKind.Property;
673 if (member is EventField)
674 return MemberKind.Event;
675 if (member is Interface)
676 return MemberKind.Interface;
677 if (member is EventProperty)
678 return MemberKind.Event;
679 if (member is Delegate)
680 return MemberKind.Delegate;
682 return MemberKind.Enum;
684 throw new NotImplementedException (member.GetType ().ToString ());
687 public static IList<MemberSpec> GetCompletitionMembers (IMemberContext ctx, TypeSpec container, string name)
689 var matches = new List<MemberSpec> ();
690 foreach (var entry in container.MemberCache.member_hash) {
691 foreach (var name_entry in entry.Value) {
692 if (name_entry.IsAccessor)
695 if ((name_entry.Kind & (MemberKind.Constructor | MemberKind.Destructor | MemberKind.Operator)) != 0)
698 if (!name_entry.IsAccessible (ctx))
701 if (name == null || name_entry.Name.StartsWith (name)) {
702 matches.Add (name_entry);
711 // Returns members of @iface only, base members are ignored
713 public static List<MethodSpec> GetInterfaceMethods (TypeSpec iface)
716 // MemberCache flatten interfaces, therefore in cases like this one
718 // interface IA : IB {}
719 // interface IB { void Foo () }
721 // we would return Foo inside IA which is not expected in this case
723 var methods = new List<MethodSpec> ();
724 foreach (var entry in iface.MemberCache.member_hash.Values) {
725 foreach (var name_entry in entry) {
726 if (iface == name_entry.DeclaringType) {
727 if (name_entry.Kind == MemberKind.Method) {
728 methods.Add ((MethodSpec) name_entry);
738 // Returns all not implememted abstract members inside abstract type
739 // NOTE: Returned list is shared and must not be modified
741 public static IList<MethodSpec> GetNotImplementedAbstractMethods (TypeSpec type)
743 if (type.MemberCache.missing_abstract != null)
744 return type.MemberCache.missing_abstract;
746 var abstract_methods = new List<MethodSpec> ();
747 List<TypeSpec> hierarchy = null;
750 // Stage 1: top-to-bottom scan for abstract members
752 var abstract_type = type;
754 foreach (var entry in abstract_type.MemberCache.member_hash) {
755 foreach (var name_entry in entry.Value) {
756 if ((name_entry.Modifiers & Modifiers.ABSTRACT) == 0)
759 if (name_entry.Kind != MemberKind.Method)
762 abstract_methods.Add ((MethodSpec) name_entry);
766 var base_type = abstract_type.BaseType;
767 if (!base_type.IsAbstract)
770 if (hierarchy == null)
771 hierarchy = new List<TypeSpec> ();
773 hierarchy.Add (abstract_type);
774 abstract_type = base_type;
777 int not_implemented_count = abstract_methods.Count;
778 if (not_implemented_count == 0 || hierarchy == null) {
779 type.MemberCache.missing_abstract = abstract_methods;
780 return type.MemberCache.missing_abstract;
784 // Stage 2: Remove already implemented methods
786 foreach (var type_up in hierarchy) {
787 var members = type_up.MemberCache.member_hash;
788 if (members.Count == 0)
791 for (int i = 0; i < abstract_methods.Count; ++i) {
792 var candidate = abstract_methods [i];
793 if (candidate == null)
796 IList<MemberSpec> applicable;
797 if (!members.TryGetValue (candidate.Name, out applicable))
800 var filter = new MemberFilter (candidate);
801 foreach (var item in applicable) {
802 if ((item.Modifiers & (Modifiers.OVERRIDE | Modifiers.VIRTUAL)) == 0)
805 if (filter.Equals (item)) {
806 --not_implemented_count;
807 abstract_methods [i] = null;
814 if (not_implemented_count == abstract_methods.Count) {
815 type.MemberCache.missing_abstract = abstract_methods;
816 return type.MemberCache.missing_abstract;
819 var not_implemented = new MethodSpec[not_implemented_count];
821 foreach (var m in abstract_methods) {
825 not_implemented[counter++] = m;
828 type.MemberCache.missing_abstract = not_implemented;
829 return type.MemberCache.missing_abstract;
832 static string GetLookupName (MemberSpec ms)
834 if (ms.Kind == MemberKind.Indexer)
835 return IndexerNameAlias;
837 if (ms.Kind == MemberKind.Constructor) {
839 return Constructor.TypeConstructorName;
841 return Constructor.ConstructorName;
847 static string GetLookupName (MemberCore mc)
850 return IndexerNameAlias;
852 if (mc is Constructor)
853 return Constructor.ConstructorName;
855 return mc.MemberName.Name;
859 // Returns all operators declared on container and its base types (until declaredOnly is used)
861 public static IList<MemberSpec> GetUserOperator (TypeSpec container, Operator.OpType op, bool declaredOnly)
863 IList<MemberSpec> found = null;
865 IList<MemberSpec> applicable;
867 var mc = container.MemberCache;
869 if (((op == Operator.OpType.Implicit || op == Operator.OpType.Explicit) && (mc.state & StateFlags.HasConversionOperator) != 0) ||
870 (mc.state & StateFlags.HasUserOperator) != 0) {
872 if (mc.member_hash.TryGetValue (Operator.GetMetadataName (op), out applicable)) {
874 for (i = 0; i < applicable.Count; ++i) {
875 if (applicable[i].Kind != MemberKind.Operator) {
881 // Handles very rare case where a method with same name as operator (op_xxxx) exists
882 // and we have to resize the applicable list
884 if (i != applicable.Count) {
885 for (i = 0; i < applicable.Count; ++i) {
886 if (applicable[i].Kind != MemberKind.Operator) {
891 found = new List<MemberSpec> ();
892 found.Add (applicable[i]);
894 var prev = found as List<MemberSpec>;
896 prev = new List<MemberSpec> (found.Count + 1);
897 prev.AddRange (found);
900 prev.Add (applicable[i]);
907 var merged = found as List<MemberSpec>;
908 if (merged == null) {
909 merged = new List<MemberSpec> (found.Count + applicable.Count);
910 merged.AddRange (found);
914 merged.AddRange (applicable);
920 // BaseType call can be expensive
924 container = container.BaseType;
925 } while (container != null);
931 // Inflates all member cache nested types
933 public void InflateTypes (MemberCache inflated_cache, TypeParameterInflator inflator)
935 foreach (var item in member_hash) {
936 IList<MemberSpec> inflated_members = null;
937 for (int i = 0; i < item.Value.Count; ++i ) {
938 var member = item.Value[i];
940 // FIXME: When inflating members refering nested types before they are inflated
944 if ((member.Kind & MemberKind.NestedMask) != 0 &&
945 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
946 if (inflated_members == null) {
947 inflated_members = new MemberSpec[item.Value.Count];
948 inflated_cache.member_hash.Add (item.Key, inflated_members);
951 inflated_members [i] = member.InflateMember (inflator);
958 // Inflates all open type members, requires InflateTypes to be called before
960 public void InflateMembers (MemberCache cacheToInflate, TypeSpec inflatedType, TypeParameterInflator inflator)
962 var inflated_member_hash = cacheToInflate.member_hash;
963 Dictionary<MemberSpec, MethodSpec> accessor_relation = null;
964 List<MemberSpec> accessor_members = null;
966 // Copy member specific flags when all members were added
967 cacheToInflate.state = state;
969 foreach (var item in member_hash) {
970 var members = item.Value;
971 IList<MemberSpec> inflated_members = null;
972 for (int i = 0; i < members.Count; ++i ) {
973 var member = members[i];
976 // All nested types have been inflated earlier except for
977 // compiler types which are created later and could miss InflateTypes
979 if ((member.Kind & MemberKind.NestedMask) != 0 &&
980 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
981 if (inflated_members == null)
982 inflated_members = inflated_member_hash[item.Key];
988 // Clone the container first
990 if (inflated_members == null) {
991 inflated_members = new MemberSpec [item.Value.Count];
992 inflated_member_hash.Add (item.Key, inflated_members);
995 var local_inflator = inflator;
997 if (member.DeclaringType != inflatedType) {
999 // Don't inflate top-level non-generic interface members
1000 // merged into generic interface
1002 if (!member.DeclaringType.IsGeneric && !member.DeclaringType.IsNested) {
1003 inflated_members [i] = member;
1008 // Needed when inflating flatten interfaces. It inflates
1009 // container type only, type parameters are already done
1011 // Handles cases like:
1013 // interface I<T> {}
1014 // interface I<U, V> : I<U> {}
1016 // class C: I<int, bool> {}
1018 var inflated_parent = inflator.Inflate (member.DeclaringType);
1019 if (inflated_parent != inflator.TypeInstance)
1020 local_inflator = new TypeParameterInflator (inflator, inflated_parent);
1024 // Inflate every member, its parent is now different
1026 var inflated = member.InflateMember (local_inflator);
1027 inflated_members [i] = inflated;
1029 if (member is PropertySpec || member is EventSpec) {
1030 if (accessor_members == null)
1031 accessor_members = new List<MemberSpec> ();
1033 accessor_members.Add (inflated);
1037 if (member.IsAccessor) {
1038 if (accessor_relation == null)
1039 accessor_relation = new Dictionary<MemberSpec, MethodSpec> ();
1040 accessor_relation.Add (member, (MethodSpec) inflated);
1045 if (accessor_members != null) {
1046 foreach (var member in accessor_members) {
1047 var prop = member as PropertySpec;
1049 if (prop.Get != null)
1050 prop.Get = accessor_relation[prop.Get];
1051 if (prop.Set != null)
1052 prop.Set = accessor_relation[prop.Set];
1057 var ev = (EventSpec) member;
1058 ev.AccessorAdd = accessor_relation[ev.AccessorAdd];
1059 ev.AccessorRemove = accessor_relation[ev.AccessorRemove];
1065 // Removes hidden base members of an interface. For compiled interfaces we cannot
1066 // do name filtering during Add (as we do for import) because we need all base
1067 // names to be valid during type definition.
1068 // Add replaces hidden base member with current one which means any name collision
1069 // (CS0108) of non-first name would be unnoticed because the name was replaced
1070 // with the one from compiled type
1072 public void RemoveHiddenMembers (TypeSpec container)
1074 foreach (var entry in member_hash) {
1075 var values = entry.Value;
1077 int container_members_start_at = 0;
1078 while (values[container_members_start_at].DeclaringType != container && ++container_members_start_at < entry.Value.Count);
1080 if (container_members_start_at == 0 || container_members_start_at == values.Count)
1083 for (int i = 0; i < container_members_start_at; ++i) {
1084 var member = values[i];
1086 if (!container.ImplementsInterface (member.DeclaringType, false))
1089 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : ParametersCompiled.EmptyReadOnlyParameters;
1091 for (int ii = container_members_start_at; ii < values.Count; ++ii) {
1092 var container_entry = values[ii];
1094 if (container_entry.Arity != member.Arity)
1097 if (container_entry is IParametersMember) {
1098 if (!TypeSpecComparer.Override.IsEqual (((IParametersMember) container_entry).Parameters, member_param))
1102 values.RemoveAt (i);
1103 --container_members_start_at;
1112 // Checks all appropriate container members for CLS compliance
1114 public void VerifyClsCompliance (TypeSpec container, Report report)
1116 if (locase_members != null)
1119 if (container.BaseType == null) {
1120 locase_members = new Dictionary<string, MemberSpec[]> (member_hash.Count); // StringComparer.OrdinalIgnoreCase);
1122 container.BaseType.MemberCache.VerifyClsCompliance (container.BaseType, report);
1123 locase_members = new Dictionary<string, MemberSpec[]> (container.BaseType.MemberCache.locase_members); //, StringComparer.OrdinalIgnoreCase);
1126 var is_imported_type = container.MemberDefinition.IsImported;
1127 foreach (var entry in container.MemberCache.member_hash) {
1128 for (int i = 0; i < entry.Value.Count; ++i ) {
1129 var name_entry = entry.Value[i];
1130 if ((name_entry.Modifiers & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
1133 if ((name_entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.COMPILER_GENERATED)) != 0)
1136 if ((name_entry.Kind & MemberKind.MaskType) == 0)
1139 if (name_entry.MemberDefinition.CLSAttributeValue == false)
1142 IParametersMember p_a = name_entry as IParametersMember;
1143 if (p_a != null && !name_entry.IsAccessor) {
1144 if (!is_imported_type) {
1145 var p_a_pd = p_a.Parameters;
1146 for (int ii = i + 1; ii < entry.Value.Count; ++ii) {
1147 var checked_entry = entry.Value[ii];
1148 IParametersMember p_b = checked_entry as IParametersMember;
1152 if (p_a_pd.Count != p_b.Parameters.Count)
1155 if (checked_entry.IsAccessor)
1158 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1160 var last = GetLaterDefinedMember (checked_entry, name_entry);
1161 if (last == checked_entry.MemberDefinition) {
1162 report.SymbolRelatedToPreviousError (name_entry);
1164 report.SymbolRelatedToPreviousError (checked_entry);
1167 if ((res & 1) != 0) {
1168 report.Warning (3006, 1, last.Location,
1169 "Overloaded method `{0}' differing only in ref or out, or in array rank, is not CLS-compliant",
1170 name_entry.GetSignatureForError ());
1173 if ((res & 2) != 0) {
1174 report.Warning (3007, 1, last.Location,
1175 "Overloaded method `{0}' differing only by unnamed array types is not CLS-compliant",
1176 name_entry.GetSignatureForError ());
1183 if (i > 0 || name_entry.Kind == MemberKind.Constructor || name_entry.Kind == MemberKind.Indexer)
1186 var name_entry_locase = name_entry.Name.ToLowerInvariant ();
1189 if (!locase_members.TryGetValue (name_entry_locase, out found)) {
1190 found = new MemberSpec[] { name_entry };
1191 locase_members.Add (name_entry_locase, found);
1193 bool same_names_only = true;
1194 foreach (var f in found) {
1195 if (f.Name == name_entry.Name)
1198 // if (f.IsAccessor && name_entry.IsAccessor)
1201 same_names_only = false;
1202 if (!is_imported_type) {
1203 var last = GetLaterDefinedMember (f, name_entry);
1204 if (last == f.MemberDefinition) {
1205 report.SymbolRelatedToPreviousError (name_entry);
1207 report.SymbolRelatedToPreviousError (f);
1210 report.Warning (3005, 1, last.Location,
1211 "Identifier `{0}' differing only in case is not CLS-compliant", last.GetSignatureForError ());
1215 if (!same_names_only) {
1216 Array.Resize (ref found, found.Length + 1);
1217 found[found.Length - 1] = name_entry;
1218 locase_members[name_entry_locase] = found;
1226 // Local report helper to issue correctly ordered members stored in hashtable
1228 static MemberCore GetLaterDefinedMember (MemberSpec a, MemberSpec b)
1230 var mc_a = a.MemberDefinition as MemberCore;
1231 var mc_b = b.MemberDefinition as MemberCore;
1238 if (mc_a.Location.File != mc_a.Location.File)
1241 return mc_b.Location.Row > mc_a.Location.Row ? mc_b : mc_a;
1244 public bool CheckExistingMembersOverloads (MemberCore member, AParametersCollection parameters)
1246 var name = GetLookupName (member);
1247 var imb = member as InterfaceMemberBase;
1248 if (imb != null && imb.IsExplicitImpl) {
1249 name = imb.GetFullName (name);
1252 return CheckExistingMembersOverloads (member, name, parameters);
1255 public bool CheckExistingMembersOverloads (MemberCore member, string name, AParametersCollection parameters)
1257 IList<MemberSpec> entries;
1258 if (!member_hash.TryGetValue (name, out entries))
1261 var Report = member.Compiler.Report;
1263 int method_param_count = parameters.Count;
1264 for (int i = entries.Count - 1; i >= 0; --i) {
1265 var ce = entries[i];
1266 var pm = ce as IParametersMember;
1267 var pd = pm == null ? ParametersCompiled.EmptyReadOnlyParameters : pm.Parameters;
1268 if (pd.Count != method_param_count)
1271 if (ce.Arity != member.MemberName.Arity)
1274 // Ignore merged interface members
1275 if (member.Parent.PartialContainer != ce.DeclaringType.MemberDefinition)
1278 var p_types = pd.Types;
1279 if (method_param_count > 0) {
1280 int ii = method_param_count - 1;
1281 TypeSpec type_a, type_b;
1283 type_a = parameters.Types [ii];
1284 type_b = p_types [ii];
1286 if ((pd.FixedParameters [ii].ModFlags & Parameter.Modifier.ISBYREF) !=
1287 (parameters.FixedParameters [ii].ModFlags & Parameter.Modifier.ISBYREF))
1290 } while (TypeSpecComparer.Override.IsEqual (type_a, type_b) && ii-- != 0);
1296 // Operators can differ in return type only
1298 if (member is Operator && ce.Kind == MemberKind.Operator && ((MethodSpec) ce).ReturnType != ((Operator) member).ReturnType)
1302 // Report difference in parameter modifiers only
1304 if (pd != null && member is MethodCore) {
1305 ii = method_param_count;
1306 while (ii-- != 0 && parameters.FixedParameters[ii].ModFlags == pd.FixedParameters[ii].ModFlags &&
1307 parameters.ExtensionMethodType == pd.ExtensionMethodType) ;
1310 var mc = ce as MethodSpec;
1311 member.Compiler.Report.SymbolRelatedToPreviousError (ce);
1312 if ((member.ModFlags & Modifiers.PARTIAL) != 0 && (mc.Modifiers & Modifiers.PARTIAL) != 0) {
1313 if (parameters.HasParams || pd.HasParams) {
1314 Report.Error (758, member.Location,
1315 "A partial method declaration and partial method implementation cannot differ on use of `params' modifier");
1317 Report.Error (755, member.Location,
1318 "A partial method declaration and partial method implementation must be both an extension method or neither");
1320 } else if (member is Constructor) {
1321 Report.Error (851, member.Location,
1322 "Overloaded contructor `{0}' cannot differ on use of parameter modifiers only",
1323 member.GetSignatureForError ());
1325 Report.Error (663, member.Location,
1326 "Overloaded method `{0}' cannot differ on use of parameter modifiers only",
1327 member.GetSignatureForError ());
1334 if ((ce.Kind & MemberKind.Method) != 0) {
1335 Method method_a = member as Method;
1336 Method method_b = ce.MemberDefinition as Method;
1337 if (method_a != null && method_b != null && (method_a.ModFlags & method_b.ModFlags & Modifiers.PARTIAL) != 0) {
1338 const Modifiers partial_modifiers = Modifiers.STATIC | Modifiers.UNSAFE;
1339 if (method_a.IsPartialDefinition == method_b.IsPartialImplementation) {
1340 if ((method_a.ModFlags & partial_modifiers) == (method_b.ModFlags & partial_modifiers) ||
1341 method_a.Parent.IsUnsafe && method_b.Parent.IsUnsafe) {
1342 if (method_a.IsPartialImplementation) {
1343 method_a.SetPartialDefinition (method_b);
1344 if (entries.Count == 1)
1345 member_hash.Remove (name);
1347 entries.RemoveAt (i);
1349 method_b.SetPartialDefinition (method_a);
1350 method_a.caching_flags |= MemberCore.Flags.PartialDefinitionExists;
1355 if (method_a.IsStatic != method_b.IsStatic) {
1356 Report.SymbolRelatedToPreviousError (ce);
1357 Report.Error (763, member.Location,
1358 "A partial method declaration and partial method implementation must be both `static' or neither");
1361 Report.SymbolRelatedToPreviousError (ce);
1362 Report.Error (764, member.Location,
1363 "A partial method declaration and partial method implementation must be both `unsafe' or neither");
1367 Report.SymbolRelatedToPreviousError (ce);
1368 if (method_a.IsPartialDefinition) {
1369 Report.Error (756, member.Location, "A partial method `{0}' declaration is already defined",
1370 member.GetSignatureForError ());
1373 Report.Error (757, member.Location, "A partial method `{0}' implementation is already defined",
1374 member.GetSignatureForError ());
1378 Report.SymbolRelatedToPreviousError (ce);
1380 bool is_reserved_a = member is AbstractPropertyEventMethod || member is Operator;
1381 bool is_reserved_b = ((MethodSpec) ce).IsReservedMethod;
1383 if (is_reserved_a || is_reserved_b) {
1384 Report.Error (82, member.Location, "A member `{0}' is already reserved",
1386 ce.GetSignatureForError () :
1387 member.GetSignatureForError ());
1391 Report.SymbolRelatedToPreviousError (ce);
1394 if (member is Operator && ce.Kind == MemberKind.Operator) {
1395 Report.Error (557, member.Location, "Duplicate user-defined conversion in type `{0}'",
1396 member.Parent.GetSignatureForError ());
1400 Report.Error (111, member.Location,
1401 "A member `{0}' is already defined. Rename this member or use different parameter types",
1402 member.GetSignatureForError ());