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 : ParametersCompiled.EmptyReadOnlyParameters;
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 if (entry is IParametersMember) {
372 var entry_param = ((IParametersMember) entry).Parameters;
373 if (!TypeSpecComparer.Override.IsEqual (entry_param, member_param))
377 if (member.DeclaringType.ImplementsInterface (entry.DeclaringType, false)) {
378 if (existing.Count == 1) {
379 existing = new MemberSpec[] { member };
383 existing.RemoveAt (i--);
387 if ((entry.DeclaringType == member.DeclaringType && entry.IsAccessor == member.IsAccessor) ||
388 entry.DeclaringType.ImplementsInterface (member.DeclaringType, false))
392 if (existing.Count == 1) {
393 existing = new List<MemberSpec> { existing[0], member };
397 existing.Add (member);
401 public static MemberSpec FindMember (TypeSpec container, MemberFilter filter, BindingRestriction restrictions)
404 IList<MemberSpec> applicable;
405 if (container.MemberCache.member_hash.TryGetValue (filter.Name, out applicable)) {
406 // Start from the end because interface members are in reverse order
407 for (int i = applicable.Count - 1; i >= 0; i--) {
408 var entry = applicable [i];
410 if ((restrictions & BindingRestriction.InstanceOnly) != 0 && entry.IsStatic)
413 if ((restrictions & BindingRestriction.NoAccessors) != 0 && entry.IsAccessor)
416 if ((restrictions & BindingRestriction.OverrideOnly) != 0 && (entry.Modifiers & Modifiers.OVERRIDE) == 0)
419 if (!filter.Equals (entry))
422 if ((restrictions & BindingRestriction.DeclaredOnly) != 0 && container.IsInterface && entry.DeclaringType != container)
429 if ((restrictions & BindingRestriction.DeclaredOnly) != 0)
432 container = container.BaseType;
433 } while (container != null);
439 // A special method to work with member lookup only. It returns a list of all members named @name
440 // starting from @container. It's very performance sensitive
442 // declaredOnlyClass cannot be used interfaces. Manual filtering is required because names are
445 public static IList<MemberSpec> FindMembers (TypeSpec container, string name, bool declaredOnlyClass)
447 IList<MemberSpec> applicable;
450 if (container.MemberCache.member_hash.TryGetValue (name, out applicable) || declaredOnlyClass)
453 container = container.BaseType;
454 } while (container != null);
460 // Finds the nested type in container
462 public static TypeSpec FindNestedType (TypeSpec container, string name, int arity)
464 IList<MemberSpec> applicable;
465 TypeSpec best_match = null;
467 #if !FULL_AOT_RUNTIME
468 // TODO: Don't know how to handle this yet
469 // When resolving base type of nested type, parent type must have
470 // base type resolved to scan full hierarchy correctly
471 // Similarly MemberCacheTypes will inflate BaseType and Interfaces
472 // based on type definition
473 var tc = container.MemberDefinition as TypeContainer;
475 tc.DefineContainer ();
478 if (container.MemberCacheTypes.member_hash.TryGetValue (name, out applicable)) {
479 for (int i = applicable.Count - 1; i >= 0; i--) {
480 var entry = applicable[i];
481 if ((entry.Kind & MemberKind.NestedMask) == 0)
484 var ts = (TypeSpec) entry;
485 if (arity == ts.Arity)
489 if (best_match == null) {
491 } else if (System.Math.Abs (ts.Arity + arity) < System.Math.Abs (ts.Arity + arity)) {
498 container = container.BaseType;
499 } while (container != null);
505 // Looks for extension methods with defined name and extension type
507 public List<MethodSpec> FindExtensionMethods (IMemberContext invocationContext, string name, int arity)
509 IList<MemberSpec> entries;
510 if (!member_hash.TryGetValue (name, out entries))
513 List<MethodSpec> candidates = null;
514 foreach (var entry in entries) {
515 if (entry.Kind != MemberKind.Method || (arity > 0 && entry.Arity != arity))
518 var ms = (MethodSpec) entry;
519 if (!ms.IsExtensionMethod)
522 if (!ms.IsAccessible (invocationContext))
526 // Extension methods cannot be nested hence checking parent is enough
528 if ((ms.DeclaringType.Modifiers & Modifiers.INTERNAL) != 0 && !ms.DeclaringType.MemberDefinition.IsInternalAsPublic (invocationContext.Module.DeclaringAssembly))
531 if (candidates == null)
532 candidates = new List<MethodSpec> ();
540 // Returns base members of @member member if no exact match is found @bestCandidate returns
543 public static MemberSpec FindBaseMember (MemberCore member, out MemberSpec bestCandidate, ref bool overrides)
545 bestCandidate = null;
546 var container = member.Parent.PartialContainer.Definition;
547 if (!container.IsInterface) {
548 container = container.BaseType;
550 // It can happen for a user definition of System.Object
551 if (container == null)
555 string name = GetLookupName (member);
556 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : null;
558 var mkind = GetMemberCoreKind (member);
559 bool member_with_accessors = mkind == MemberKind.Indexer || mkind == MemberKind.Property;
561 IList<MemberSpec> applicable;
562 MemberSpec ambig_candidate = null;
565 if (container.MemberCache.member_hash.TryGetValue (name, out applicable)) {
566 for (int i = 0; i < applicable.Count; ++i) {
567 var entry = applicable [i];
569 if ((entry.Modifiers & Modifiers.PUBLIC) == 0 && !entry.IsAccessible (member))
573 // Isn't the member of same kind ?
575 if ((entry.Kind & ~MemberKind.Destructor & mkind & MemberKind.MaskType) == 0) {
576 // Destructors are ignored as they cannot be overridden by user
577 if ((entry.Kind & MemberKind.Destructor) != 0)
580 // A method with different arity does not hide base member
581 if (mkind != MemberKind.Method && member.MemberName.Arity != entry.Arity)
584 bestCandidate = entry;
589 // Same kind of different arity is valid
591 if (member.MemberName.Arity != entry.Arity) {
595 if ((entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
596 if (entry.IsAccessor != member is AbstractPropertyEventMethod)
599 var pm = entry as IParametersMember;
600 if (!TypeSpecComparer.Override.IsEqual (pm.Parameters, member_param))
605 // Skip override for member with accessors. It may not fully implement the base member
606 // but keep flag we found an implementation in case the base member is abstract
608 if (member_with_accessors && ((entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.SEALED)) == Modifiers.OVERRIDE)) {
610 // Set candidate to override implementation to flag we found an implementation
617 // For members with parameters we can encounter an ambiguous candidates (they match exactly)
618 // because generic type parameters could be inflated into same types
620 if (ambig_candidate == null && (entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
621 bestCandidate = null;
622 ambig_candidate = entry;
626 bestCandidate = ambig_candidate;
631 if (container.IsInterface || ambig_candidate != null)
634 container = container.BaseType;
635 } while (container != null);
637 return ambig_candidate;
641 // Returns inflated version of MemberSpec, it works similarly to
642 // SRE TypeBuilder.GetMethod
644 public static T GetMember<T> (TypeSpec container, T spec) where T : MemberSpec
646 IList<MemberSpec> applicable;
647 if (container.MemberCache.member_hash.TryGetValue (GetLookupName (spec), out applicable)) {
648 for (int i = applicable.Count - 1; i >= 0; i--) {
649 var entry = applicable[i];
650 if (entry.MemberDefinition == spec.MemberDefinition)
655 throw new InternalErrorException ("Missing member `{0}' on inflated type `{1}'",
656 spec.GetSignatureForError (), container.GetSignatureForError ());
659 static MemberKind GetMemberCoreKind (MemberCore member)
661 if (member is FieldBase)
662 return MemberKind.Field;
663 if (member is Indexer)
664 return MemberKind.Indexer;
666 return MemberKind.Class;
667 if (member is Struct)
668 return MemberKind.Struct;
669 if (member is Destructor)
670 return MemberKind.Destructor;
671 if (member is Method)
672 return MemberKind.Method;
673 if (member is Property)
674 return MemberKind.Property;
675 if (member is EventField)
676 return MemberKind.Event;
677 if (member is Interface)
678 return MemberKind.Interface;
679 if (member is EventProperty)
680 return MemberKind.Event;
681 if (member is Delegate)
682 return MemberKind.Delegate;
684 return MemberKind.Enum;
686 throw new NotImplementedException (member.GetType ().ToString ());
689 public static List<FieldSpec> GetAllFieldsForDefiniteAssignment (TypeSpec container)
691 List<FieldSpec> fields = null;
692 foreach (var entry in container.MemberCache.member_hash) {
693 foreach (var name_entry in entry.Value) {
694 if (name_entry.Kind != MemberKind.Field)
697 if ((name_entry.Modifiers & Modifiers.STATIC) != 0)
701 // Fixed size buffers are not subject to definite assignment checking
703 if (name_entry is FixedFieldSpec || name_entry is ConstSpec)
706 var fs = (FieldSpec) name_entry;
709 // LAMESPEC: Very bizzare hack, definitive assignment is not done
710 // for imported non-public reference fields except array. No idea what the
711 // actual csc rule is
713 if (!fs.IsPublic && container.MemberDefinition.IsImported && (!fs.MemberType.IsArray && TypeSpec.IsReferenceType (fs.MemberType)))
716 //if ((fs.Modifiers & (Modifiers.BACKING_FIELD) != 0)
720 fields = new List<FieldSpec> ();
727 return fields ?? new List<FieldSpec> (0);
730 public static IList<MemberSpec> GetCompletitionMembers (IMemberContext ctx, TypeSpec container, string name)
732 var matches = new List<MemberSpec> ();
733 foreach (var entry in container.MemberCache.member_hash) {
734 foreach (var name_entry in entry.Value) {
735 if (name_entry.IsAccessor)
738 if ((name_entry.Kind & (MemberKind.Constructor | MemberKind.Destructor | MemberKind.Operator)) != 0)
741 if (!name_entry.IsAccessible (ctx))
744 if (name == null || name_entry.Name.StartsWith (name)) {
745 matches.Add (name_entry);
754 // Returns members of @iface only, base members are ignored
756 public static List<MethodSpec> GetInterfaceMethods (TypeSpec iface)
759 // MemberCache flatten interfaces, therefore in cases like this one
761 // interface IA : IB {}
762 // interface IB { void Foo () }
764 // we would return Foo inside IA which is not expected in this case
766 var methods = new List<MethodSpec> ();
767 foreach (var entry in iface.MemberCache.member_hash.Values) {
768 foreach (var name_entry in entry) {
769 if (iface == name_entry.DeclaringType) {
770 if (name_entry.Kind == MemberKind.Method) {
771 methods.Add ((MethodSpec) name_entry);
781 // Returns all not implememted abstract members inside abstract type
782 // NOTE: Returned list is shared and must not be modified
784 public static IList<MethodSpec> GetNotImplementedAbstractMethods (TypeSpec type)
786 if (type.MemberCache.missing_abstract != null)
787 return type.MemberCache.missing_abstract;
789 var abstract_methods = new List<MethodSpec> ();
790 List<TypeSpec> hierarchy = null;
793 // Stage 1: top-to-bottom scan for abstract members
795 var abstract_type = type;
797 foreach (var entry in abstract_type.MemberCache.member_hash) {
798 foreach (var name_entry in entry.Value) {
799 if ((name_entry.Modifiers & Modifiers.ABSTRACT) == 0)
802 var ms = name_entry as MethodSpec;
806 abstract_methods.Add (ms);
810 var base_type = abstract_type.BaseType;
811 if (!base_type.IsAbstract)
814 if (hierarchy == null)
815 hierarchy = new List<TypeSpec> ();
817 hierarchy.Add (abstract_type);
818 abstract_type = base_type;
821 int not_implemented_count = abstract_methods.Count;
822 if (not_implemented_count == 0 || hierarchy == null) {
823 type.MemberCache.missing_abstract = abstract_methods;
824 return type.MemberCache.missing_abstract;
828 // Stage 2: Remove already implemented methods
830 foreach (var type_up in hierarchy) {
831 var members = type_up.MemberCache.member_hash;
832 if (members.Count == 0)
835 for (int i = 0; i < abstract_methods.Count; ++i) {
836 var candidate = abstract_methods [i];
837 if (candidate == null)
840 IList<MemberSpec> applicable;
841 if (!members.TryGetValue (candidate.Name, out applicable))
844 var filter = new MemberFilter (candidate);
845 foreach (var item in applicable) {
846 if ((item.Modifiers & (Modifiers.OVERRIDE | Modifiers.VIRTUAL)) == 0)
850 // Abstract override does not override anything
852 if ((item.Modifiers & Modifiers.ABSTRACT) != 0)
855 if (filter.Equals (item)) {
856 --not_implemented_count;
857 abstract_methods [i] = null;
864 if (not_implemented_count == abstract_methods.Count) {
865 type.MemberCache.missing_abstract = abstract_methods;
866 return type.MemberCache.missing_abstract;
869 var not_implemented = new MethodSpec[not_implemented_count];
871 foreach (var m in abstract_methods) {
875 not_implemented[counter++] = m;
878 type.MemberCache.missing_abstract = not_implemented;
879 return type.MemberCache.missing_abstract;
882 static string GetLookupName (MemberSpec ms)
884 if (ms.Kind == MemberKind.Indexer)
885 return IndexerNameAlias;
887 if (ms.Kind == MemberKind.Constructor) {
889 return Constructor.TypeConstructorName;
891 return Constructor.ConstructorName;
897 static string GetLookupName (MemberCore mc)
900 return IndexerNameAlias;
902 if (mc is Constructor)
903 return mc.IsStatic ? Constructor.TypeConstructorName : Constructor.ConstructorName;
905 return mc.MemberName.Name;
909 // Returns all operators declared on container and its base types (until declaredOnly is used)
911 public static IList<MemberSpec> GetUserOperator (TypeSpec container, Operator.OpType op, bool declaredOnly)
913 IList<MemberSpec> found = null;
914 bool shared_list = true;
915 IList<MemberSpec> applicable;
917 var mc = container.MemberCache;
919 if (((op == Operator.OpType.Implicit || op == Operator.OpType.Explicit) && (mc.state & StateFlags.HasConversionOperator) != 0) ||
920 (mc.state & StateFlags.HasUserOperator) != 0) {
922 if (mc.member_hash.TryGetValue (Operator.GetMetadataName (op), out applicable)) {
924 for (i = 0; i < applicable.Count; ++i) {
925 if (applicable[i].Kind != MemberKind.Operator) {
931 // Handles very rare case where a method with same name as operator (op_xxxx) exists
932 // and we have to resize the applicable list
934 if (i != applicable.Count) {
935 for (i = 0; i < applicable.Count; ++i) {
936 if (applicable[i].Kind != MemberKind.Operator) {
941 found = new List<MemberSpec> ();
942 found.Add (applicable[i]);
944 List<MemberSpec> prev;
947 prev = new List<MemberSpec> (found.Count + 1);
948 prev.AddRange (found);
950 prev = (List<MemberSpec>) found;
953 prev.Add (applicable[i]);
961 List<MemberSpec> merged;
964 merged = new List<MemberSpec> (found.Count + applicable.Count);
965 merged.AddRange (found);
968 merged = (List<MemberSpec>) found;
971 merged.AddRange (applicable);
977 // BaseType call can be expensive
981 container = container.BaseType;
982 } while (container != null);
988 // Inflates all member cache nested types
990 public void InflateTypes (MemberCache inflated_cache, TypeParameterInflator inflator)
992 foreach (var item in member_hash) {
993 IList<MemberSpec> inflated_members = null;
994 for (int i = 0; i < item.Value.Count; ++i ) {
995 var member = item.Value[i];
997 // FIXME: When inflating members refering nested types before they are inflated
1001 if ((member.Kind & MemberKind.NestedMask) != 0 &&
1002 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
1003 if (inflated_members == null) {
1004 inflated_members = new MemberSpec[item.Value.Count];
1005 inflated_cache.member_hash.Add (item.Key, inflated_members);
1008 inflated_members [i] = member.InflateMember (inflator);
1015 // Inflates all open type members, requires InflateTypes to be called before
1017 public void InflateMembers (MemberCache cacheToInflate, TypeSpec inflatedType, TypeParameterInflator inflator)
1019 var inflated_member_hash = cacheToInflate.member_hash;
1020 Dictionary<MemberSpec, MethodSpec> accessor_relation = null;
1021 List<MemberSpec> accessor_members = null;
1023 // Copy member specific flags when all members were added
1024 cacheToInflate.state = state;
1026 foreach (var item in member_hash) {
1027 var members = item.Value;
1028 IList<MemberSpec> inflated_members = null;
1029 for (int i = 0; i < members.Count; ++i ) {
1030 var member = members[i];
1033 // All nested types have been inflated earlier except for
1034 // compiler types which are created later and could miss InflateTypes
1036 if ((member.Kind & MemberKind.NestedMask) != 0 &&
1037 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
1038 if (inflated_members == null)
1039 inflated_members = inflated_member_hash[item.Key];
1045 // Clone the container first
1047 if (inflated_members == null) {
1048 inflated_members = new MemberSpec [item.Value.Count];
1049 inflated_member_hash.Add (item.Key, inflated_members);
1052 var local_inflator = inflator;
1054 if (member.DeclaringType != inflatedType) {
1056 // Don't inflate top-level non-generic interface members
1057 // merged into generic interface
1059 if (!member.DeclaringType.IsGeneric && !member.DeclaringType.IsNested) {
1060 inflated_members [i] = member;
1065 // Needed when inflating flatten interfaces. It inflates
1066 // container type only, type parameters are already done
1068 // Handles cases like:
1070 // interface I<T> {}
1071 // interface I<U, V> : I<U> {}
1073 // class C: I<int, bool> {}
1075 var inflated_parent = inflator.Inflate (member.DeclaringType);
1076 if (inflated_parent != inflator.TypeInstance)
1077 local_inflator = new TypeParameterInflator (inflator, inflated_parent);
1081 // Inflate every member, its parent is now different
1083 var inflated = member.InflateMember (local_inflator);
1084 inflated_members [i] = inflated;
1086 if (member is PropertySpec || member is EventSpec) {
1087 if (accessor_members == null)
1088 accessor_members = new List<MemberSpec> ();
1090 accessor_members.Add (inflated);
1094 if (member.IsAccessor) {
1095 if (accessor_relation == null)
1096 accessor_relation = new Dictionary<MemberSpec, MethodSpec> ();
1097 accessor_relation.Add (member, (MethodSpec) inflated);
1102 if (accessor_members != null) {
1103 foreach (var member in accessor_members) {
1104 var prop = member as PropertySpec;
1106 if (prop.Get != null)
1107 prop.Get = accessor_relation[prop.Get];
1108 if (prop.Set != null)
1109 prop.Set = accessor_relation[prop.Set];
1114 var ev = (EventSpec) member;
1115 ev.AccessorAdd = accessor_relation[ev.AccessorAdd];
1116 ev.AccessorRemove = accessor_relation[ev.AccessorRemove];
1122 // Removes hidden base members of an interface. For compiled interfaces we cannot
1123 // do name filtering during Add (as we do for import) because we need all base
1124 // names to be valid during type definition.
1125 // Add replaces hidden base member with current one which means any name collision
1126 // (CS0108) of non-first name would be unnoticed because the name was replaced
1127 // with the one from compiled type
1129 public void RemoveHiddenMembers (TypeSpec container)
1131 foreach (var entry in member_hash) {
1132 var values = entry.Value;
1134 int container_members_start_at = 0;
1135 while (values[container_members_start_at].DeclaringType != container && ++container_members_start_at < entry.Value.Count);
1137 if (container_members_start_at == 0 || container_members_start_at == values.Count)
1140 for (int i = 0; i < container_members_start_at; ++i) {
1141 var member = values[i];
1143 if (!container.ImplementsInterface (member.DeclaringType, false))
1146 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : ParametersCompiled.EmptyReadOnlyParameters;
1148 for (int ii = container_members_start_at; ii < values.Count; ++ii) {
1149 var container_entry = values[ii];
1151 if (container_entry.Arity != member.Arity)
1154 if (container_entry is IParametersMember) {
1155 if (!TypeSpecComparer.Override.IsEqual (((IParametersMember) container_entry).Parameters, member_param))
1159 values.RemoveAt (i);
1160 --container_members_start_at;
1169 // Checks all appropriate container members for CLS compliance
1171 public void VerifyClsCompliance (TypeSpec container, Report report)
1173 if (locase_members != null)
1176 if (container.BaseType == null) {
1177 locase_members = new Dictionary<string, MemberSpec[]> (member_hash.Count); // StringComparer.OrdinalIgnoreCase);
1179 var btype = container.BaseType.GetDefinition ();
1180 btype.MemberCache.VerifyClsCompliance (btype, report);
1181 locase_members = new Dictionary<string, MemberSpec[]> (btype.MemberCache.locase_members); //, StringComparer.OrdinalIgnoreCase);
1184 var is_imported_type = container.MemberDefinition.IsImported;
1185 foreach (var entry in container.MemberCache.member_hash) {
1186 for (int i = 0; i < entry.Value.Count; ++i ) {
1187 var name_entry = entry.Value[i];
1188 if ((name_entry.Modifiers & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
1191 if ((name_entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.COMPILER_GENERATED)) != 0)
1194 if ((name_entry.Kind & MemberKind.MaskType) == 0)
1197 if (name_entry.MemberDefinition.CLSAttributeValue == false)
1200 IParametersMember p_a = null;
1201 if (!is_imported_type) {
1202 p_a = name_entry as IParametersMember;
1203 if (p_a != null && !name_entry.IsAccessor) {
1204 var p_a_pd = p_a.Parameters;
1206 // Check differing overloads in @container
1208 for (int ii = i + 1; ii < entry.Value.Count; ++ii) {
1209 var checked_entry = entry.Value[ii];
1210 IParametersMember p_b = checked_entry as IParametersMember;
1214 if (p_a_pd.Count != p_b.Parameters.Count)
1217 if (checked_entry.IsAccessor)
1220 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1222 ReportOverloadedMethodClsDifference (name_entry, checked_entry, res, report);
1228 if (i > 0 || name_entry.Kind == MemberKind.Constructor || name_entry.Kind == MemberKind.Indexer)
1231 var name_entry_locase = name_entry.Name.ToLowerInvariant ();
1234 if (!locase_members.TryGetValue (name_entry_locase, out found)) {
1235 found = new MemberSpec[] { name_entry };
1236 locase_members.Add (name_entry_locase, found);
1238 bool same_names_only = true;
1239 foreach (var f in found) {
1240 if (f.Name == name_entry.Name) {
1242 IParametersMember p_b = f as IParametersMember;
1246 if (p_a.Parameters.Count != p_b.Parameters.Count)
1252 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1254 ReportOverloadedMethodClsDifference (f, name_entry, res, report);
1261 same_names_only = false;
1262 if (!is_imported_type) {
1263 var last = GetLaterDefinedMember (f, name_entry);
1264 if (last == f.MemberDefinition) {
1265 report.SymbolRelatedToPreviousError (name_entry);
1267 report.SymbolRelatedToPreviousError (f);
1270 report.Warning (3005, 1, last.Location,
1271 "Identifier `{0}' differing only in case is not CLS-compliant", last.GetSignatureForError ());
1275 if (!same_names_only) {
1276 Array.Resize (ref found, found.Length + 1);
1277 found[found.Length - 1] = name_entry;
1278 locase_members[name_entry_locase] = found;
1286 // Local report helper to issue correctly ordered members stored in hashtable
1288 static MemberCore GetLaterDefinedMember (MemberSpec a, MemberSpec b)
1290 var mc_a = a.MemberDefinition as MemberCore;
1291 var mc_b = b.MemberDefinition as MemberCore;
1298 if (a.DeclaringType.MemberDefinition != b.DeclaringType.MemberDefinition)
1301 if (mc_a.Location.File != mc_a.Location.File)
1304 return mc_b.Location.Row > mc_a.Location.Row ? mc_b : mc_a;
1307 static void ReportOverloadedMethodClsDifference (MemberSpec a, MemberSpec b, int res, Report report)
1309 var last = GetLaterDefinedMember (a, b);
1310 if (last == a.MemberDefinition) {
1311 report.SymbolRelatedToPreviousError (b);
1313 report.SymbolRelatedToPreviousError (a);
1316 if ((res & 1) != 0) {
1317 report.Warning (3006, 1, last.Location,
1318 "Overloaded method `{0}' differing only in ref or out, or in array rank, is not CLS-compliant",
1319 last.GetSignatureForError ());
1322 if ((res & 2) != 0) {
1323 report.Warning (3007, 1, last.Location,
1324 "Overloaded method `{0}' differing only by unnamed array types is not CLS-compliant",
1325 last.GetSignatureForError ());
1329 public bool CheckExistingMembersOverloads (MemberCore member, AParametersCollection parameters)
1331 var name = GetLookupName (member);
1332 var imb = member as InterfaceMemberBase;
1333 if (imb != null && imb.IsExplicitImpl) {
1334 name = imb.GetFullName (name);
1337 return CheckExistingMembersOverloads (member, name, parameters);
1340 public bool CheckExistingMembersOverloads (MemberCore member, string name, AParametersCollection parameters)
1342 IList<MemberSpec> entries;
1343 if (!member_hash.TryGetValue (name, out entries))
1346 var Report = member.Compiler.Report;
1348 int method_param_count = parameters.Count;
1349 for (int i = entries.Count - 1; i >= 0; --i) {
1350 var ce = entries[i];
1351 var pm = ce as IParametersMember;
1352 var pd = pm == null ? ParametersCompiled.EmptyReadOnlyParameters : pm.Parameters;
1353 if (pd.Count != method_param_count)
1356 if (ce.Arity != member.MemberName.Arity)
1359 // Ignore merged interface members
1360 if (member.Parent.PartialContainer != ce.DeclaringType.MemberDefinition)
1363 var p_types = pd.Types;
1364 if (method_param_count > 0) {
1365 int ii = method_param_count - 1;
1366 TypeSpec type_a, type_b;
1368 type_a = parameters.Types [ii];
1369 type_b = p_types [ii];
1371 var a_byref = (pd.FixedParameters[ii].ModFlags & Parameter.Modifier.RefOutMask) != 0;
1372 var b_byref = (parameters.FixedParameters[ii].ModFlags & Parameter.Modifier.RefOutMask) != 0;
1374 if (a_byref != b_byref)
1377 } while (TypeSpecComparer.Override.IsEqual (type_a, type_b) && ii-- != 0);
1383 // Operators can differ in return type only
1385 if (member is Operator && ce.Kind == MemberKind.Operator && ((MethodSpec) ce).ReturnType != ((Operator) member).ReturnType)
1389 // Report difference in parameter modifiers only
1391 if (pd != null && member is MethodCore) {
1392 ii = method_param_count;
1394 (parameters.FixedParameters[ii].ModFlags & Parameter.Modifier.ModifierMask) ==
1395 (pd.FixedParameters[ii].ModFlags & Parameter.Modifier.ModifierMask) &&
1396 parameters.ExtensionMethodType == pd.ExtensionMethodType) ;
1399 var mc = ce as MethodSpec;
1400 member.Compiler.Report.SymbolRelatedToPreviousError (ce);
1401 if ((member.ModFlags & Modifiers.PARTIAL) != 0 && (mc.Modifiers & Modifiers.PARTIAL) != 0) {
1402 if (parameters.HasParams || pd.HasParams) {
1403 Report.Error (758, member.Location,
1404 "A partial method declaration and partial method implementation cannot differ on use of `params' modifier");
1406 Report.Error (755, member.Location,
1407 "A partial method declaration and partial method implementation must be both an extension method or neither");
1409 } else if (member is Constructor) {
1410 Report.Error (851, member.Location,
1411 "Overloaded contructor `{0}' cannot differ on use of parameter modifiers only",
1412 member.GetSignatureForError ());
1414 Report.Error (663, member.Location,
1415 "Overloaded method `{0}' cannot differ on use of parameter modifiers only",
1416 member.GetSignatureForError ());
1423 if ((ce.Kind & MemberKind.Method) != 0) {
1424 Method method_a = member as Method;
1425 Method method_b = ce.MemberDefinition as Method;
1426 if (method_a != null && method_b != null && (method_a.ModFlags & method_b.ModFlags & Modifiers.PARTIAL) != 0) {
1427 const Modifiers partial_modifiers = Modifiers.STATIC | Modifiers.UNSAFE;
1428 if (method_a.IsPartialDefinition == method_b.IsPartialImplementation) {
1429 if ((method_a.ModFlags & partial_modifiers) == (method_b.ModFlags & partial_modifiers) ||
1430 method_a.Parent.IsUnsafe && method_b.Parent.IsUnsafe) {
1431 if (method_a.IsPartialImplementation) {
1432 method_a.SetPartialDefinition (method_b);
1433 if (entries.Count == 1)
1434 member_hash.Remove (name);
1436 entries.RemoveAt (i);
1438 method_b.SetPartialDefinition (method_a);
1439 method_a.caching_flags |= MemberCore.Flags.PartialDefinitionExists;
1444 if (method_a.IsStatic != method_b.IsStatic) {
1445 Report.SymbolRelatedToPreviousError (ce);
1446 Report.Error (763, member.Location,
1447 "A partial method declaration and partial method implementation must be both `static' or neither");
1450 if ((method_a.ModFlags & Modifiers.UNSAFE) != (method_b.ModFlags & Modifiers.UNSAFE)) {
1451 Report.SymbolRelatedToPreviousError (ce);
1452 Report.Error (764, member.Location,
1453 "A partial method declaration and partial method implementation must be both `unsafe' or neither");
1459 Report.SymbolRelatedToPreviousError (ce);
1460 if (method_a.IsPartialDefinition) {
1461 Report.Error (756, member.Location, "A partial method `{0}' declaration is already defined",
1462 member.GetSignatureForError ());
1465 Report.Error (757, member.Location, "A partial method `{0}' implementation is already defined",
1466 member.GetSignatureForError ());
1470 Report.SymbolRelatedToPreviousError (ce);
1472 bool is_reserved_a = member is AbstractPropertyEventMethod || member is Operator;
1473 bool is_reserved_b = ((MethodSpec) ce).IsReservedMethod;
1475 if (is_reserved_a || is_reserved_b) {
1476 Report.Error (82, member.Location, "A member `{0}' is already reserved",
1478 ce.GetSignatureForError () :
1479 member.GetSignatureForError ());
1483 Report.SymbolRelatedToPreviousError (ce);
1486 if (member is Operator && ce.Kind == MemberKind.Operator) {
1487 Report.Error (557, member.Location, "Duplicate user-defined conversion in type `{0}'",
1488 member.Parent.GetSignatureForError ());
1492 Report.Error (111, member.Location,
1493 "A member `{0}' is already defined. Rename this member or use different parameter types",
1494 member.GetSignatureForError ());