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 public void AddInterface (TypeSpec iface)
245 var cache = iface.MemberCache;
247 IList<MemberSpec> list;
248 foreach (var entry in cache.member_hash) {
249 if (!member_hash.TryGetValue (entry.Key, out list)) {
250 if (entry.Value.Count == 1) {
253 list = new List<MemberSpec> (entry.Value);
256 member_hash.Add (entry.Key, list);
260 foreach (var ce in entry.Value) {
261 if (list.Contains (ce))
264 if (AddInterfaceMember (ce, ref list))
265 member_hash[entry.Key] = list;
269 // Add also all base interfaces
270 if (iface.Interfaces != null) {
271 foreach (var base_iface in iface.Interfaces)
272 AddInterface (base_iface);
276 public void AddMember (InterfaceMemberBase imb, string exlicitName, MemberSpec ms)
278 // Explicit names cannot be looked-up but can be used for
279 // collision checking (no name mangling needed)
280 if (imb.IsExplicitImpl)
281 AddMember (exlicitName, ms, false);
287 // Add non-explicit member to member cache
289 public void AddMember (MemberSpec ms)
291 AddMember (GetLookupName (ms), ms, false);
294 void AddMember (string name, MemberSpec member, bool removeHiddenMembers)
296 if (member.Kind == MemberKind.Operator) {
297 var dt = member.DeclaringType;
300 // Some core types have user operators but they cannot be used like normal
301 // user operators as they are predefined and therefore having different
302 // rules (e.g. binary operators) by not setting the flag we hide them for
305 if (!BuiltinTypeSpec.IsPrimitiveType (dt)) {
306 switch (dt.BuiltinType) {
307 case BuiltinTypeSpec.Type.String:
308 case BuiltinTypeSpec.Type.Delegate:
309 case BuiltinTypeSpec.Type.MulticastDelegate:
312 if (name == Operator.GetMetadataName (Operator.OpType.Implicit) || name == Operator.GetMetadataName (Operator.OpType.Explicit)) {
313 state |= StateFlags.HasConversionOperator;
315 state |= StateFlags.HasUserOperator;
323 IList<MemberSpec> list;
324 if (!member_hash.TryGetValue (name, out list)) {
325 member_hash.Add (name, new MemberSpec[] { member });
329 if (removeHiddenMembers && member.DeclaringType.IsInterface) {
330 if (AddInterfaceMember (member, ref list))
331 member_hash[name] = list;
333 if (list.Count == 1) {
334 list = new List<MemberSpec> () { list[0] };
335 member_hash[name] = list;
342 public void AddMemberImported (MemberSpec ms)
344 AddMember (GetLookupName (ms), ms, true);
348 // Ignores any base interface member which can be hidden
351 static bool AddInterfaceMember (MemberSpec member, ref IList<MemberSpec> existing)
353 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : ParametersCompiled.EmptyReadOnlyParameters;
356 // interface IA : IB { int Prop { set; } }
357 // interface IB { bool Prop { get; } }
359 // IB.Prop is never accessible from IA interface
361 for (int i = 0; i < existing.Count; ++i) {
362 var entry = existing[i];
364 if (entry.Arity != member.Arity)
367 if (entry is IParametersMember) {
368 var entry_param = ((IParametersMember) entry).Parameters;
369 if (!TypeSpecComparer.Override.IsEqual (entry_param, member_param))
373 if (member.DeclaringType.ImplementsInterface (entry.DeclaringType, false)) {
374 if (existing.Count == 1) {
375 existing = new MemberSpec[] { member };
379 existing.RemoveAt (i--);
383 if ((entry.DeclaringType == member.DeclaringType && entry.IsAccessor == member.IsAccessor) ||
384 entry.DeclaringType.ImplementsInterface (member.DeclaringType, false))
388 if (existing.Count == 1) {
389 existing = new List<MemberSpec> () { existing[0], member };
393 existing.Add (member);
397 public static MemberSpec FindMember (TypeSpec container, MemberFilter filter, BindingRestriction restrictions)
400 IList<MemberSpec> applicable;
401 if (container.MemberCache.member_hash.TryGetValue (filter.Name, out applicable)) {
402 // Start from the end because interface members are in reverse order
403 for (int i = applicable.Count - 1; i >= 0; i--) {
404 var entry = applicable [i];
406 if ((restrictions & BindingRestriction.InstanceOnly) != 0 && entry.IsStatic)
409 if ((restrictions & BindingRestriction.NoAccessors) != 0 && entry.IsAccessor)
412 if ((restrictions & BindingRestriction.OverrideOnly) != 0 && (entry.Modifiers & Modifiers.OVERRIDE) == 0)
415 if (!filter.Equals (entry))
418 if ((restrictions & BindingRestriction.DeclaredOnly) != 0 && container.IsInterface && entry.DeclaringType != container)
425 if ((restrictions & BindingRestriction.DeclaredOnly) != 0)
428 container = container.BaseType;
429 } while (container != null);
435 // A special method to work with member lookup only. It returns a list of all members named @name
436 // starting from @container. It's very performance sensitive
438 public static IList<MemberSpec> FindMembers (TypeSpec container, string name, bool declaredOnly)
440 IList<MemberSpec> applicable;
443 if (container.MemberCache.member_hash.TryGetValue (name, out applicable) || declaredOnly)
446 container = container.BaseType;
447 } while (container != null);
453 // Finds the nested type in container
455 public static TypeSpec FindNestedType (TypeSpec container, string name, int arity)
457 IList<MemberSpec> applicable;
458 TypeSpec best_match = null;
460 // TODO: Don't know how to handle this yet
461 // When resolving base type of nested type, parent type must have
462 // base type resolved to scan full hierarchy correctly
463 // Similarly MemberCacheTypes will inflate BaseType and Interfaces
464 // based on type definition
465 var tc = container.MemberDefinition as TypeContainer;
467 tc.DefineContainer ();
469 if (container.MemberCacheTypes.member_hash.TryGetValue (name, out applicable)) {
470 for (int i = applicable.Count - 1; i >= 0; i--) {
471 var entry = applicable[i];
472 if ((entry.Kind & MemberKind.NestedMask) == 0)
475 var ts = (TypeSpec) entry;
476 if (arity == ts.Arity)
480 if (best_match == null) {
482 } else if (System.Math.Abs (ts.Arity + arity) < System.Math.Abs (ts.Arity + arity)) {
489 container = container.BaseType;
490 } while (container != null);
496 // Looks for extension methods with defined name and extension type
498 public List<MethodSpec> FindExtensionMethods (IMemberContext invocationContext, TypeSpec extensionType, string name, int arity)
500 IList<MemberSpec> entries;
501 if (!member_hash.TryGetValue (name, out entries))
504 List<MethodSpec> candidates = null;
505 foreach (var entry in entries) {
506 if (entry.Kind != MemberKind.Method || (arity > 0 && entry.Arity != arity))
509 var ms = (MethodSpec) entry;
510 if (!ms.IsExtensionMethod)
513 if (!ms.IsAccessible (invocationContext))
517 // Extension methods cannot be nested hence checking parent is enough
519 if ((ms.DeclaringType.Modifiers & Modifiers.INTERNAL) != 0 && !ms.DeclaringType.MemberDefinition.IsInternalAsPublic (invocationContext.Module.DeclaringAssembly))
522 if (candidates == null)
523 candidates = new List<MethodSpec> ();
531 // Returns base members of @member member if no exact match is found @bestCandidate returns
534 public static MemberSpec FindBaseMember (MemberCore member, out MemberSpec bestCandidate, ref bool overrides)
536 bestCandidate = null;
537 var container = member.Parent.PartialContainer.Definition;
538 if (!container.IsInterface) {
539 container = container.BaseType;
541 // It can happen for a user definition of System.Object
542 if (container == null)
546 string name = GetLookupName (member);
547 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : null;
549 var mkind = GetMemberCoreKind (member);
550 bool member_with_accessors = mkind == MemberKind.Indexer || mkind == MemberKind.Property;
552 IList<MemberSpec> applicable;
553 MemberSpec ambig_candidate = null;
556 if (container.MemberCache.member_hash.TryGetValue (name, out applicable)) {
557 for (int i = 0; i < applicable.Count; ++i) {
558 var entry = applicable [i];
560 if ((entry.Modifiers & Modifiers.PRIVATE) != 0)
563 if ((entry.Modifiers & Modifiers.AccessibilityMask) == Modifiers.INTERNAL &&
564 !entry.DeclaringType.MemberDefinition.IsInternalAsPublic (member.Module.DeclaringAssembly))
568 // Isn't the member of same kind ?
570 if ((entry.Kind & ~MemberKind.Destructor & mkind & MemberKind.MaskType) == 0) {
571 // Destructors are ignored as they cannot be overridden by user
572 if ((entry.Kind & MemberKind.Destructor) != 0)
575 // A method with different arity does not hide base member
576 if (mkind != MemberKind.Method && member.MemberName.Arity != entry.Arity)
579 bestCandidate = entry;
584 // Same kind of different arity is valid
586 if (member.MemberName.Arity != entry.Arity) {
590 if ((entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
591 if (entry.IsAccessor != member is AbstractPropertyEventMethod)
594 var pm = entry as IParametersMember;
595 if (!TypeSpecComparer.Override.IsEqual (pm.Parameters, member_param))
600 // Skip override for member with accessors. It may not fully implement the base member
601 // but keep flag we found an implementation in case the base member is abstract
603 if (member_with_accessors && ((entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.SEALED)) == Modifiers.OVERRIDE)) {
605 // Set candidate to override implementation to flag we found an implementation
612 // For members with parameters we can encounter an ambiguous candidates (they match exactly)
613 // because generic type parameters could be inflated into same types
615 if (ambig_candidate == null && (entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
616 bestCandidate = null;
617 ambig_candidate = entry;
621 bestCandidate = ambig_candidate;
626 if (container.IsInterface || ambig_candidate != null)
629 container = container.BaseType;
630 } while (container != null);
632 return ambig_candidate;
636 // Returns inflated version of MemberSpec, it works similarly to
637 // SRE TypeBuilder.GetMethod
639 public static T GetMember<T> (TypeSpec container, T spec) where T : MemberSpec
641 IList<MemberSpec> applicable;
642 if (container.MemberCache.member_hash.TryGetValue (GetLookupName (spec), out applicable)) {
643 for (int i = applicable.Count - 1; i >= 0; i--) {
644 var entry = applicable[i];
645 if (entry.MemberDefinition == spec.MemberDefinition)
650 throw new InternalErrorException ("Missing member `{0}' on inflated type `{1}'",
651 spec.GetSignatureForError (), container.GetSignatureForError ());
654 static MemberKind GetMemberCoreKind (MemberCore member)
656 if (member is FieldBase)
657 return MemberKind.Field;
658 if (member is Indexer)
659 return MemberKind.Indexer;
661 return MemberKind.Class;
662 if (member is Struct)
663 return MemberKind.Struct;
664 if (member is Destructor)
665 return MemberKind.Destructor;
666 if (member is Method)
667 return MemberKind.Method;
668 if (member is Property)
669 return MemberKind.Property;
670 if (member is EventField)
671 return MemberKind.Event;
672 if (member is Interface)
673 return MemberKind.Interface;
674 if (member is EventProperty)
675 return MemberKind.Event;
676 if (member is Delegate)
677 return MemberKind.Delegate;
679 return MemberKind.Enum;
681 throw new NotImplementedException (member.GetType ().ToString ());
684 public static List<FieldSpec> GetAllFieldsForDefiniteAssignment (TypeSpec container)
686 List<FieldSpec> fields = null;
687 foreach (var entry in container.MemberCache.member_hash) {
688 foreach (var name_entry in entry.Value) {
689 if (name_entry.Kind != MemberKind.Field)
692 if ((name_entry.Modifiers & Modifiers.STATIC) != 0)
696 // Fixed size buffers are not subject to definite assignment checking
698 if (name_entry is FixedFieldSpec || name_entry is ConstSpec)
701 var fs = (FieldSpec) name_entry;
704 // LAMESPEC: Very bizzare hack, definitive assignment is not done
705 // for imported non-public reference fields except array. No idea what the
706 // actual csc rule is
708 if (!fs.IsPublic && container.MemberDefinition.IsImported && (!fs.MemberType.IsArray && TypeSpec.IsReferenceType (fs.MemberType)))
712 fields = new List<FieldSpec> ();
719 return fields ?? new List<FieldSpec> (0);
722 public static IList<MemberSpec> GetCompletitionMembers (IMemberContext ctx, TypeSpec container, string name)
724 var matches = new List<MemberSpec> ();
725 foreach (var entry in container.MemberCache.member_hash) {
726 foreach (var name_entry in entry.Value) {
727 if (name_entry.IsAccessor)
730 if ((name_entry.Kind & (MemberKind.Constructor | MemberKind.Destructor | MemberKind.Operator)) != 0)
733 if (!name_entry.IsAccessible (ctx))
736 if (name == null || name_entry.Name.StartsWith (name)) {
737 matches.Add (name_entry);
746 // Returns members of @iface only, base members are ignored
748 public static List<MethodSpec> GetInterfaceMethods (TypeSpec iface)
751 // MemberCache flatten interfaces, therefore in cases like this one
753 // interface IA : IB {}
754 // interface IB { void Foo () }
756 // we would return Foo inside IA which is not expected in this case
758 var methods = new List<MethodSpec> ();
759 foreach (var entry in iface.MemberCache.member_hash.Values) {
760 foreach (var name_entry in entry) {
761 if (iface == name_entry.DeclaringType) {
762 if (name_entry.Kind == MemberKind.Method) {
763 methods.Add ((MethodSpec) name_entry);
773 // Returns all not implememted abstract members inside abstract type
774 // NOTE: Returned list is shared and must not be modified
776 public static IList<MethodSpec> GetNotImplementedAbstractMethods (TypeSpec type)
778 if (type.MemberCache.missing_abstract != null)
779 return type.MemberCache.missing_abstract;
781 var abstract_methods = new List<MethodSpec> ();
782 List<TypeSpec> hierarchy = null;
785 // Stage 1: top-to-bottom scan for abstract members
787 var abstract_type = type;
789 foreach (var entry in abstract_type.MemberCache.member_hash) {
790 foreach (var name_entry in entry.Value) {
791 if ((name_entry.Modifiers & (Modifiers.ABSTRACT | Modifiers.OVERRIDE)) != Modifiers.ABSTRACT)
794 if (name_entry.Kind != MemberKind.Method)
797 abstract_methods.Add ((MethodSpec) name_entry);
801 var base_type = abstract_type.BaseType;
802 if (!base_type.IsAbstract)
805 if (hierarchy == null)
806 hierarchy = new List<TypeSpec> ();
808 hierarchy.Add (abstract_type);
809 abstract_type = base_type;
812 int not_implemented_count = abstract_methods.Count;
813 if (not_implemented_count == 0 || hierarchy == null) {
814 type.MemberCache.missing_abstract = abstract_methods;
815 return type.MemberCache.missing_abstract;
819 // Stage 2: Remove already implemented methods
821 foreach (var type_up in hierarchy) {
822 var members = type_up.MemberCache.member_hash;
823 if (members.Count == 0)
826 for (int i = 0; i < abstract_methods.Count; ++i) {
827 var candidate = abstract_methods [i];
828 if (candidate == null)
831 IList<MemberSpec> applicable;
832 if (!members.TryGetValue (candidate.Name, out applicable))
835 var filter = new MemberFilter (candidate);
836 foreach (var item in applicable) {
837 if ((item.Modifiers & (Modifiers.OVERRIDE | Modifiers.VIRTUAL)) == 0)
841 // Abstract override does not override anything
843 if ((item.Modifiers & Modifiers.ABSTRACT) != 0)
846 if (filter.Equals (item)) {
847 --not_implemented_count;
848 abstract_methods [i] = null;
855 if (not_implemented_count == abstract_methods.Count) {
856 type.MemberCache.missing_abstract = abstract_methods;
857 return type.MemberCache.missing_abstract;
860 var not_implemented = new MethodSpec[not_implemented_count];
862 foreach (var m in abstract_methods) {
866 not_implemented[counter++] = m;
869 type.MemberCache.missing_abstract = not_implemented;
870 return type.MemberCache.missing_abstract;
873 static string GetLookupName (MemberSpec ms)
875 if (ms.Kind == MemberKind.Indexer)
876 return IndexerNameAlias;
878 if (ms.Kind == MemberKind.Constructor) {
880 return Constructor.TypeConstructorName;
882 return Constructor.ConstructorName;
888 static string GetLookupName (MemberCore mc)
891 return IndexerNameAlias;
893 if (mc is Constructor)
894 return mc.IsStatic ? Constructor.TypeConstructorName : Constructor.ConstructorName;
896 return mc.MemberName.Name;
900 // Returns all operators declared on container and its base types (until declaredOnly is used)
902 public static IList<MemberSpec> GetUserOperator (TypeSpec container, Operator.OpType op, bool declaredOnly)
904 IList<MemberSpec> found = null;
906 IList<MemberSpec> applicable;
908 var mc = container.MemberCache;
910 if (((op == Operator.OpType.Implicit || op == Operator.OpType.Explicit) && (mc.state & StateFlags.HasConversionOperator) != 0) ||
911 (mc.state & StateFlags.HasUserOperator) != 0) {
913 if (mc.member_hash.TryGetValue (Operator.GetMetadataName (op), out applicable)) {
915 for (i = 0; i < applicable.Count; ++i) {
916 if (applicable[i].Kind != MemberKind.Operator) {
922 // Handles very rare case where a method with same name as operator (op_xxxx) exists
923 // and we have to resize the applicable list
925 if (i != applicable.Count) {
926 for (i = 0; i < applicable.Count; ++i) {
927 if (applicable[i].Kind != MemberKind.Operator) {
932 found = new List<MemberSpec> ();
933 found.Add (applicable[i]);
935 var prev = found as List<MemberSpec>;
937 prev = new List<MemberSpec> (found.Count + 1);
938 prev.AddRange (found);
941 prev.Add (applicable[i]);
948 var merged = found as List<MemberSpec>;
949 if (merged == null) {
950 merged = new List<MemberSpec> (found.Count + applicable.Count);
951 merged.AddRange (found);
955 merged.AddRange (applicable);
961 // BaseType call can be expensive
965 container = container.BaseType;
966 } while (container != null);
972 // Inflates all member cache nested types
974 public void InflateTypes (MemberCache inflated_cache, TypeParameterInflator inflator)
976 foreach (var item in member_hash) {
977 IList<MemberSpec> inflated_members = null;
978 for (int i = 0; i < item.Value.Count; ++i ) {
979 var member = item.Value[i];
981 // FIXME: When inflating members refering nested types before they are inflated
985 if ((member.Kind & MemberKind.NestedMask) != 0 &&
986 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
987 if (inflated_members == null) {
988 inflated_members = new MemberSpec[item.Value.Count];
989 inflated_cache.member_hash.Add (item.Key, inflated_members);
992 inflated_members [i] = member.InflateMember (inflator);
999 // Inflates all open type members, requires InflateTypes to be called before
1001 public void InflateMembers (MemberCache cacheToInflate, TypeSpec inflatedType, TypeParameterInflator inflator)
1003 var inflated_member_hash = cacheToInflate.member_hash;
1004 Dictionary<MemberSpec, MethodSpec> accessor_relation = null;
1005 List<MemberSpec> accessor_members = null;
1007 // Copy member specific flags when all members were added
1008 cacheToInflate.state = state;
1010 foreach (var item in member_hash) {
1011 var members = item.Value;
1012 IList<MemberSpec> inflated_members = null;
1013 for (int i = 0; i < members.Count; ++i ) {
1014 var member = members[i];
1017 // All nested types have been inflated earlier except for
1018 // compiler types which are created later and could miss InflateTypes
1020 if ((member.Kind & MemberKind.NestedMask) != 0 &&
1021 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
1022 if (inflated_members == null)
1023 inflated_members = inflated_member_hash[item.Key];
1029 // Clone the container first
1031 if (inflated_members == null) {
1032 inflated_members = new MemberSpec [item.Value.Count];
1033 inflated_member_hash.Add (item.Key, inflated_members);
1036 var local_inflator = inflator;
1038 if (member.DeclaringType != inflatedType) {
1040 // Don't inflate top-level non-generic interface members
1041 // merged into generic interface
1043 if (!member.DeclaringType.IsGeneric && !member.DeclaringType.IsNested) {
1044 inflated_members [i] = member;
1049 // Needed when inflating flatten interfaces. It inflates
1050 // container type only, type parameters are already done
1052 // Handles cases like:
1054 // interface I<T> {}
1055 // interface I<U, V> : I<U> {}
1057 // class C: I<int, bool> {}
1059 var inflated_parent = inflator.Inflate (member.DeclaringType);
1060 if (inflated_parent != inflator.TypeInstance)
1061 local_inflator = new TypeParameterInflator (inflator, inflated_parent);
1065 // Inflate every member, its parent is now different
1067 var inflated = member.InflateMember (local_inflator);
1068 inflated_members [i] = inflated;
1070 if (member is PropertySpec || member is EventSpec) {
1071 if (accessor_members == null)
1072 accessor_members = new List<MemberSpec> ();
1074 accessor_members.Add (inflated);
1078 if (member.IsAccessor) {
1079 if (accessor_relation == null)
1080 accessor_relation = new Dictionary<MemberSpec, MethodSpec> ();
1081 accessor_relation.Add (member, (MethodSpec) inflated);
1086 if (accessor_members != null) {
1087 foreach (var member in accessor_members) {
1088 var prop = member as PropertySpec;
1090 if (prop.Get != null)
1091 prop.Get = accessor_relation[prop.Get];
1092 if (prop.Set != null)
1093 prop.Set = accessor_relation[prop.Set];
1098 var ev = (EventSpec) member;
1099 ev.AccessorAdd = accessor_relation[ev.AccessorAdd];
1100 ev.AccessorRemove = accessor_relation[ev.AccessorRemove];
1106 // Removes hidden base members of an interface. For compiled interfaces we cannot
1107 // do name filtering during Add (as we do for import) because we need all base
1108 // names to be valid during type definition.
1109 // Add replaces hidden base member with current one which means any name collision
1110 // (CS0108) of non-first name would be unnoticed because the name was replaced
1111 // with the one from compiled type
1113 public void RemoveHiddenMembers (TypeSpec container)
1115 foreach (var entry in member_hash) {
1116 var values = entry.Value;
1118 int container_members_start_at = 0;
1119 while (values[container_members_start_at].DeclaringType != container && ++container_members_start_at < entry.Value.Count);
1121 if (container_members_start_at == 0 || container_members_start_at == values.Count)
1124 for (int i = 0; i < container_members_start_at; ++i) {
1125 var member = values[i];
1127 if (!container.ImplementsInterface (member.DeclaringType, false))
1130 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : ParametersCompiled.EmptyReadOnlyParameters;
1132 for (int ii = container_members_start_at; ii < values.Count; ++ii) {
1133 var container_entry = values[ii];
1135 if (container_entry.Arity != member.Arity)
1138 if (container_entry is IParametersMember) {
1139 if (!TypeSpecComparer.Override.IsEqual (((IParametersMember) container_entry).Parameters, member_param))
1143 values.RemoveAt (i);
1144 --container_members_start_at;
1153 // Checks all appropriate container members for CLS compliance
1155 public void VerifyClsCompliance (TypeSpec container, Report report)
1157 if (locase_members != null)
1160 if (container.BaseType == null) {
1161 locase_members = new Dictionary<string, MemberSpec[]> (member_hash.Count); // StringComparer.OrdinalIgnoreCase);
1163 var btype = container.BaseType.GetDefinition ();
1164 btype.MemberCache.VerifyClsCompliance (btype, report);
1165 locase_members = new Dictionary<string, MemberSpec[]> (btype.MemberCache.locase_members); //, StringComparer.OrdinalIgnoreCase);
1168 var is_imported_type = container.MemberDefinition.IsImported;
1169 foreach (var entry in container.MemberCache.member_hash) {
1170 for (int i = 0; i < entry.Value.Count; ++i ) {
1171 var name_entry = entry.Value[i];
1172 if ((name_entry.Modifiers & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
1175 if ((name_entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.COMPILER_GENERATED)) != 0)
1178 if ((name_entry.Kind & MemberKind.MaskType) == 0)
1181 if (name_entry.MemberDefinition.CLSAttributeValue == false)
1184 IParametersMember p_a = null;
1185 if (!is_imported_type) {
1186 p_a = name_entry as IParametersMember;
1187 if (p_a != null && !name_entry.IsAccessor) {
1188 var p_a_pd = p_a.Parameters;
1190 // Check differing overloads in @container
1192 for (int ii = i + 1; ii < entry.Value.Count; ++ii) {
1193 var checked_entry = entry.Value[ii];
1194 IParametersMember p_b = checked_entry as IParametersMember;
1198 if (p_a_pd.Count != p_b.Parameters.Count)
1201 if (checked_entry.IsAccessor)
1204 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1206 ReportOverloadedMethodClsDifference (name_entry, checked_entry, res, report);
1212 if (i > 0 || name_entry.Kind == MemberKind.Constructor || name_entry.Kind == MemberKind.Indexer)
1215 var name_entry_locase = name_entry.Name.ToLowerInvariant ();
1218 if (!locase_members.TryGetValue (name_entry_locase, out found)) {
1219 found = new MemberSpec[] { name_entry };
1220 locase_members.Add (name_entry_locase, found);
1222 bool same_names_only = true;
1223 foreach (var f in found) {
1224 if (f.Name == name_entry.Name) {
1226 IParametersMember p_b = f as IParametersMember;
1230 if (p_a.Parameters.Count != p_b.Parameters.Count)
1236 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1238 ReportOverloadedMethodClsDifference (f, name_entry, res, report);
1245 same_names_only = false;
1246 if (!is_imported_type) {
1247 var last = GetLaterDefinedMember (f, name_entry);
1248 if (last == f.MemberDefinition) {
1249 report.SymbolRelatedToPreviousError (name_entry);
1251 report.SymbolRelatedToPreviousError (f);
1254 report.Warning (3005, 1, last.Location,
1255 "Identifier `{0}' differing only in case is not CLS-compliant", last.GetSignatureForError ());
1259 if (!same_names_only) {
1260 Array.Resize (ref found, found.Length + 1);
1261 found[found.Length - 1] = name_entry;
1262 locase_members[name_entry_locase] = found;
1270 // Local report helper to issue correctly ordered members stored in hashtable
1272 static MemberCore GetLaterDefinedMember (MemberSpec a, MemberSpec b)
1274 var mc_a = a.MemberDefinition as MemberCore;
1275 var mc_b = b.MemberDefinition as MemberCore;
1282 if (a.DeclaringType.MemberDefinition != b.DeclaringType.MemberDefinition)
1285 if (mc_a.Location.File != mc_a.Location.File)
1288 return mc_b.Location.Row > mc_a.Location.Row ? mc_b : mc_a;
1291 static void ReportOverloadedMethodClsDifference (MemberSpec a, MemberSpec b, int res, Report report)
1293 var last = GetLaterDefinedMember (a, b);
1294 if (last == a.MemberDefinition) {
1295 report.SymbolRelatedToPreviousError (b);
1297 report.SymbolRelatedToPreviousError (a);
1300 if ((res & 1) != 0) {
1301 report.Warning (3006, 1, last.Location,
1302 "Overloaded method `{0}' differing only in ref or out, or in array rank, is not CLS-compliant",
1303 last.GetSignatureForError ());
1306 if ((res & 2) != 0) {
1307 report.Warning (3007, 1, last.Location,
1308 "Overloaded method `{0}' differing only by unnamed array types is not CLS-compliant",
1309 last.GetSignatureForError ());
1313 public bool CheckExistingMembersOverloads (MemberCore member, AParametersCollection parameters)
1315 var name = GetLookupName (member);
1316 var imb = member as InterfaceMemberBase;
1317 if (imb != null && imb.IsExplicitImpl) {
1318 name = imb.GetFullName (name);
1321 return CheckExistingMembersOverloads (member, name, parameters);
1324 public bool CheckExistingMembersOverloads (MemberCore member, string name, AParametersCollection parameters)
1326 IList<MemberSpec> entries;
1327 if (!member_hash.TryGetValue (name, out entries))
1330 var Report = member.Compiler.Report;
1332 int method_param_count = parameters.Count;
1333 for (int i = entries.Count - 1; i >= 0; --i) {
1334 var ce = entries[i];
1335 var pm = ce as IParametersMember;
1336 var pd = pm == null ? ParametersCompiled.EmptyReadOnlyParameters : pm.Parameters;
1337 if (pd.Count != method_param_count)
1340 if (ce.Arity != member.MemberName.Arity)
1343 // Ignore merged interface members
1344 if (member.Parent.PartialContainer != ce.DeclaringType.MemberDefinition)
1347 var p_types = pd.Types;
1348 if (method_param_count > 0) {
1349 int ii = method_param_count - 1;
1350 TypeSpec type_a, type_b;
1352 type_a = parameters.Types [ii];
1353 type_b = p_types [ii];
1355 var a_byref = (pd.FixedParameters[ii].ModFlags & Parameter.Modifier.RefOutMask) != 0;
1356 var b_byref = (parameters.FixedParameters[ii].ModFlags & Parameter.Modifier.RefOutMask) != 0;
1358 if (a_byref != b_byref)
1361 } while (TypeSpecComparer.Override.IsEqual (type_a, type_b) && ii-- != 0);
1367 // Operators can differ in return type only
1369 if (member is Operator && ce.Kind == MemberKind.Operator && ((MethodSpec) ce).ReturnType != ((Operator) member).ReturnType)
1373 // Report difference in parameter modifiers only
1375 if (pd != null && member is MethodCore) {
1376 ii = method_param_count;
1378 (parameters.FixedParameters[ii].ModFlags & Parameter.Modifier.ModifierMask) ==
1379 (pd.FixedParameters[ii].ModFlags & Parameter.Modifier.ModifierMask) &&
1380 parameters.ExtensionMethodType == pd.ExtensionMethodType) ;
1383 var mc = ce as MethodSpec;
1384 member.Compiler.Report.SymbolRelatedToPreviousError (ce);
1385 if ((member.ModFlags & Modifiers.PARTIAL) != 0 && (mc.Modifiers & Modifiers.PARTIAL) != 0) {
1386 if (parameters.HasParams || pd.HasParams) {
1387 Report.Error (758, member.Location,
1388 "A partial method declaration and partial method implementation cannot differ on use of `params' modifier");
1390 Report.Error (755, member.Location,
1391 "A partial method declaration and partial method implementation must be both an extension method or neither");
1393 } else if (member is Constructor) {
1394 Report.Error (851, member.Location,
1395 "Overloaded contructor `{0}' cannot differ on use of parameter modifiers only",
1396 member.GetSignatureForError ());
1398 Report.Error (663, member.Location,
1399 "Overloaded method `{0}' cannot differ on use of parameter modifiers only",
1400 member.GetSignatureForError ());
1407 if ((ce.Kind & MemberKind.Method) != 0) {
1408 Method method_a = member as Method;
1409 Method method_b = ce.MemberDefinition as Method;
1410 if (method_a != null && method_b != null && (method_a.ModFlags & method_b.ModFlags & Modifiers.PARTIAL) != 0) {
1411 const Modifiers partial_modifiers = Modifiers.STATIC | Modifiers.UNSAFE;
1412 if (method_a.IsPartialDefinition == method_b.IsPartialImplementation) {
1413 if ((method_a.ModFlags & partial_modifiers) == (method_b.ModFlags & partial_modifiers) ||
1414 method_a.Parent.IsUnsafe && method_b.Parent.IsUnsafe) {
1415 if (method_a.IsPartialImplementation) {
1416 method_a.SetPartialDefinition (method_b);
1417 if (entries.Count == 1)
1418 member_hash.Remove (name);
1420 entries.RemoveAt (i);
1422 method_b.SetPartialDefinition (method_a);
1423 method_a.caching_flags |= MemberCore.Flags.PartialDefinitionExists;
1428 if (method_a.IsStatic != method_b.IsStatic) {
1429 Report.SymbolRelatedToPreviousError (ce);
1430 Report.Error (763, member.Location,
1431 "A partial method declaration and partial method implementation must be both `static' or neither");
1434 Report.SymbolRelatedToPreviousError (ce);
1435 Report.Error (764, member.Location,
1436 "A partial method declaration and partial method implementation must be both `unsafe' or neither");
1440 Report.SymbolRelatedToPreviousError (ce);
1441 if (method_a.IsPartialDefinition) {
1442 Report.Error (756, member.Location, "A partial method `{0}' declaration is already defined",
1443 member.GetSignatureForError ());
1446 Report.Error (757, member.Location, "A partial method `{0}' implementation is already defined",
1447 member.GetSignatureForError ());
1451 Report.SymbolRelatedToPreviousError (ce);
1453 bool is_reserved_a = member is AbstractPropertyEventMethod || member is Operator;
1454 bool is_reserved_b = ((MethodSpec) ce).IsReservedMethod;
1456 if (is_reserved_a || is_reserved_b) {
1457 Report.Error (82, member.Location, "A member `{0}' is already reserved",
1459 ce.GetSignatureForError () :
1460 member.GetSignatureForError ());
1464 Report.SymbolRelatedToPreviousError (ce);
1467 if (member is Operator && ce.Kind == MemberKind.Operator) {
1468 Report.Error (557, member.Location, "Duplicate user-defined conversion in type `{0}'",
1469 member.Parent.GetSignatureForError ());
1473 Report.Error (111, member.Location,
1474 "A member `{0}' is already defined. Rename this member or use different parameter types",
1475 member.GetSignatureForError ());