2 // membercache.cs: A container for all member lookups
4 // Author: Miguel de Icaza (miguel@gnu.org)
5 // Marek Safar (marek.safar@gmail.com)
7 // Dual licensed under the terms of the MIT X11 or GNU GPL
9 // Copyright 2001 Ximian, Inc (http://www.ximian.com)
10 // Copyright 2004-2010 Novell, Inc
11 // Copyright 2011 Xamarin Inc
16 using System.Collections.Generic;
18 namespace Mono.CSharp {
21 public enum MemberKind
37 TypeParameter = 1 << 16,
40 PointerType = 1 << 20,
41 InternalCompilerType = 1 << 21,
42 MissingType = 1 << 22,
46 NestedMask = Class | Struct | Delegate | Enum | Interface,
47 GenericMask = Method | Class | Struct | Delegate | Interface,
48 MaskType = Constructor | Event | Field | Method | Property | Indexer | Operator | Destructor | NestedMask
52 public enum BindingRestriction
56 // Inspect only queried type members
57 DeclaredOnly = 1 << 1,
60 InstanceOnly = 1 << 2,
64 // Member has to be override
68 public struct MemberFilter : IEquatable<MemberSpec>
70 public readonly string Name;
71 public readonly MemberKind Kind;
72 public readonly AParametersCollection Parameters;
73 public readonly TypeSpec MemberType;
74 public readonly int Arity; // -1 to ignore the check
76 public MemberFilter (MethodSpec m)
79 Kind = MemberKind.Method;
80 Parameters = m.Parameters;
81 MemberType = m.ReturnType;
85 public MemberFilter (string name, int arity, MemberKind kind, AParametersCollection param, TypeSpec type)
94 public static MemberFilter Constructor (AParametersCollection param)
96 return new MemberFilter (Mono.CSharp.Constructor.ConstructorName, 0, MemberKind.Constructor, param, null);
99 public static MemberFilter Property (string name, TypeSpec type)
101 return new MemberFilter (name, 0, MemberKind.Property, null, type);
104 public static MemberFilter Field (string name, TypeSpec type)
106 return new MemberFilter (name, 0, MemberKind.Field, null, type);
109 public static MemberFilter Method (string name, int arity, AParametersCollection param, TypeSpec type)
111 return new MemberFilter (name, arity, MemberKind.Method, param, type);
114 #region IEquatable<MemberSpec> Members
116 public bool Equals (MemberSpec other)
118 // Is the member of the correct type ?
119 // TODO: Isn't this redundant ?
120 if ((other.Kind & Kind & MemberKind.MaskType) == 0)
123 // Check arity when not disabled
124 if (Arity >= 0 && Arity != other.Arity)
127 if (Parameters != null) {
128 if (other is IParametersMember) {
129 var other_param = ((IParametersMember) other).Parameters;
130 if (!TypeSpecComparer.Override.IsEqual (Parameters, other_param))
137 if (MemberType != null) {
138 if (other is IInterfaceMemberSpec) {
139 var other_type = ((IInterfaceMemberSpec) other).MemberType;
140 if (!TypeSpecComparer.Override.IsEqual (other_type, MemberType))
154 // The MemberCache is the main members container used by compiler. It contains
155 // all members imported or defined during compilation using on demand filling
156 // process. Inflated containers are also using MemberCache to make inflated
157 // members look like normal definition.
159 // All of the methods are performance and memory sensitive as the MemberCache
160 // is the underlying engine of all member based operations.
162 public class MemberCache
167 HasConversionOperator = 1 << 1,
168 HasUserOperator = 1 << 2
171 readonly Dictionary<string, IList<MemberSpec>> member_hash;
172 Dictionary<string, MemberSpec[]> locase_members;
173 IList<MethodSpec> missing_abstract;
174 StateFlags state; // TODO: Move to TypeSpec or ITypeDefinition
176 public static readonly string IndexerNameAlias = "<this>";
178 public static readonly MemberCache Empty = new MemberCache (0);
180 public MemberCache ()
185 public MemberCache (int capacity)
187 member_hash = new Dictionary<string, IList<MemberSpec>> (capacity);
190 public MemberCache (MemberCache cache)
191 : this (cache.member_hash.Count)
193 this.state = cache.state;
197 // Creates a new MemberCache for the given `container'.
199 public MemberCache (TypeContainer container)
200 : this () // TODO: Optimize the size
205 // For cases where we need to union cache members
207 public void AddBaseType (TypeSpec baseType)
209 var cache = baseType.MemberCache;
211 IList<MemberSpec> list;
212 foreach (var entry in cache.member_hash) {
213 if (!member_hash.TryGetValue (entry.Key, out list)) {
214 if (entry.Value.Count == 1) {
217 list = new List<MemberSpec> (entry.Value);
220 member_hash.Add (entry.Key, list);
224 foreach (var ce in entry.Value) {
225 if (list.Contains (ce))
228 if (list is MemberSpec[]) {
229 list = new List<MemberSpec> { list [0] };
230 member_hash[entry.Key] = list;
239 // Member-cache does not contain base members but it does
240 // contain all base interface members, so the Lookup code
241 // can use simple inheritance rules.
243 // Does not work recursively because of generic interfaces
245 public void AddInterface (TypeSpec iface)
247 var cache = iface.MemberCache;
249 IList<MemberSpec> list;
250 foreach (var entry in cache.member_hash) {
251 if (!member_hash.TryGetValue (entry.Key, out list)) {
252 if (entry.Value.Count == 1) {
255 list = new List<MemberSpec> (entry.Value);
258 member_hash.Add (entry.Key, list);
262 foreach (var ce in entry.Value) {
264 // When two or more different base interfaces implemenent common
270 if (list.Contains (ce))
273 if (AddInterfaceMember (ce, ref list))
274 member_hash[entry.Key] = list;
279 public void AddMember (InterfaceMemberBase imb, string exlicitName, MemberSpec ms)
281 // Explicit names cannot be looked-up but can be used for
282 // collision checking (no name mangling needed)
283 if (imb.IsExplicitImpl)
284 AddMember (exlicitName, ms, false);
290 // Add non-explicit member to member cache
292 public void AddMember (MemberSpec ms)
294 AddMember (GetLookupName (ms), ms, false);
297 void AddMember (string name, MemberSpec member, bool removeHiddenMembers)
299 if (member.Kind == MemberKind.Operator) {
300 var dt = member.DeclaringType;
304 // Some core types have user operators but they cannot be used like normal
305 // user operators as they are predefined and therefore having different
306 // rules (e.g. binary operators) by not setting the flag we hide them for
309 if (!BuiltinTypeSpec.IsPrimitiveType (dt) || dt.BuiltinType == BuiltinTypeSpec.Type.Char) {
310 switch (dt.BuiltinType) {
311 case BuiltinTypeSpec.Type.String:
312 case BuiltinTypeSpec.Type.Delegate:
313 case BuiltinTypeSpec.Type.MulticastDelegate:
316 if (name == Operator.GetMetadataName (Operator.OpType.Implicit) || name == Operator.GetMetadataName (Operator.OpType.Explicit)) {
317 state |= StateFlags.HasConversionOperator;
319 state |= StateFlags.HasUserOperator;
327 IList<MemberSpec> list;
328 if (!member_hash.TryGetValue (name, out list)) {
329 member_hash.Add (name, new MemberSpec[] { member });
333 if (removeHiddenMembers && member.DeclaringType.IsInterface) {
334 if (AddInterfaceMember (member, ref list))
335 member_hash[name] = list;
337 if (list.Count == 1) {
338 list = new List<MemberSpec> { list[0] };
339 member_hash[name] = list;
346 public void AddMemberImported (MemberSpec ms)
348 AddMember (GetLookupName (ms), ms, true);
352 // Ignores any base interface member which can be hidden
355 static bool AddInterfaceMember (MemberSpec member, ref IList<MemberSpec> existing)
357 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : null;
360 // interface IA : IB { int Prop { set; } }
361 // interface IB { bool Prop { get; } }
363 // IB.Prop is never accessible from IA interface
365 for (int i = 0; i < existing.Count; ++i) {
366 var entry = existing[i];
368 if (entry.Arity != member.Arity)
371 AParametersCollection entry_param = null;
372 if (member_param != null) {
373 var entry_pm = entry as IParametersMember;
374 if (entry_pm != null) {
375 entry_param = entry_pm.Parameters;
376 if (!TypeSpecComparer.Override.IsEqual (entry_param, member_param))
381 if (member.DeclaringType.ImplementsInterface (entry.DeclaringType, false)) {
382 if (existing.Count == 1) {
383 existing = new MemberSpec[] { member };
387 existing.RemoveAt (i--);
391 if ((entry.DeclaringType == member.DeclaringType && entry.IsAccessor == member.IsAccessor))
394 if (entry.DeclaringType.ImplementsInterface (member.DeclaringType, false) && AParametersCollection.HasSameParameterDefaults (entry_param, member_param))
398 if (existing.Count == 1) {
399 existing = new List<MemberSpec> { existing[0], member };
403 existing.Add (member);
407 public static MemberSpec FindMember (TypeSpec container, MemberFilter filter, BindingRestriction restrictions)
410 IList<MemberSpec> applicable;
411 if (container.MemberCache.member_hash.TryGetValue (filter.Name, out applicable)) {
412 // Start from the end because interface members are in reverse order
413 for (int i = applicable.Count - 1; i >= 0; i--) {
414 var entry = applicable [i];
416 if ((restrictions & BindingRestriction.InstanceOnly) != 0 && entry.IsStatic)
419 if ((restrictions & BindingRestriction.NoAccessors) != 0 && entry.IsAccessor)
422 if ((restrictions & BindingRestriction.OverrideOnly) != 0 && (entry.Modifiers & Modifiers.OVERRIDE) == 0)
425 if (!filter.Equals (entry))
428 if ((restrictions & BindingRestriction.DeclaredOnly) != 0 && container.IsInterface && entry.DeclaringType != container)
435 if ((restrictions & BindingRestriction.DeclaredOnly) != 0)
438 container = container.BaseType;
439 } while (container != null);
445 // A special method to work with member lookup only. It returns a list of all members named @name
446 // starting from @container. It's very performance sensitive
448 // declaredOnlyClass cannot be used interfaces. Manual filtering is required because names are
451 public static IList<MemberSpec> FindMembers (TypeSpec container, string name, bool declaredOnlyClass)
453 IList<MemberSpec> applicable;
456 if (container.MemberCache.member_hash.TryGetValue (name, out applicable) || declaredOnlyClass)
459 container = container.BaseType;
460 } while (container != null);
466 // Finds the nested type in container
468 public static TypeSpec FindNestedType (TypeSpec container, string name, int arity)
470 IList<MemberSpec> applicable;
471 TypeSpec best_match = null;
473 #if !FULL_AOT_RUNTIME
474 // TODO: Don't know how to handle this yet
475 // When resolving base type of nested type, parent type must have
476 // base type resolved to scan full hierarchy correctly
477 // Similarly MemberCacheTypes will inflate BaseType and Interfaces
478 // based on type definition
479 var tc = container.MemberDefinition as TypeContainer;
481 tc.DefineContainer ();
484 if (container.MemberCacheTypes.member_hash.TryGetValue (name, out applicable)) {
485 for (int i = applicable.Count - 1; i >= 0; i--) {
486 var entry = applicable[i];
487 if ((entry.Kind & MemberKind.NestedMask) == 0)
490 var ts = (TypeSpec) entry;
491 if (arity == ts.Arity)
495 if (best_match == null) {
497 } else if (System.Math.Abs (ts.Arity + arity) < System.Math.Abs (ts.Arity + arity)) {
504 container = container.BaseType;
505 } while (container != null);
511 // Looks for extension methods with defined name and extension type
513 public List<MethodSpec> FindExtensionMethods (IMemberContext invocationContext, string name, int arity)
515 IList<MemberSpec> entries;
516 if (!member_hash.TryGetValue (name, out entries))
519 List<MethodSpec> candidates = null;
520 foreach (var entry in entries) {
521 if (entry.Kind != MemberKind.Method || (arity > 0 && entry.Arity != arity))
524 var ms = (MethodSpec) entry;
525 if (!ms.IsExtensionMethod)
528 if (!ms.IsAccessible (invocationContext))
532 // Extension methods cannot be nested hence checking parent is enough
534 if ((ms.DeclaringType.Modifiers & Modifiers.INTERNAL) != 0 && !ms.DeclaringType.MemberDefinition.IsInternalAsPublic (invocationContext.Module.DeclaringAssembly))
537 if (candidates == null)
538 candidates = new List<MethodSpec> ();
546 // Returns base members of @member member if no exact match is found @bestCandidate returns
549 public static MemberSpec FindBaseMember (MemberCore member, out MemberSpec bestCandidate, ref bool overrides)
551 bestCandidate = null;
552 var container = member.Parent.PartialContainer.Definition;
553 if (!container.IsInterface) {
554 container = container.BaseType;
556 // It can happen for a user definition of System.Object
557 if (container == null)
561 string name = GetLookupName (member);
562 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : null;
564 var mkind = GetMemberCoreKind (member);
565 bool member_with_accessors = mkind == MemberKind.Indexer || mkind == MemberKind.Property;
567 IList<MemberSpec> applicable;
568 MemberSpec ambig_candidate = null;
571 if (container.MemberCache.member_hash.TryGetValue (name, out applicable)) {
572 for (int i = 0; i < applicable.Count; ++i) {
573 var entry = applicable [i];
575 if ((entry.Modifiers & Modifiers.PUBLIC) == 0 && !entry.IsAccessible (member))
579 // Isn't the member of same kind ?
581 if ((entry.Kind & ~MemberKind.Destructor & mkind & MemberKind.MaskType) == 0) {
582 // Destructors are ignored as they cannot be overridden by user
583 if ((entry.Kind & MemberKind.Destructor) != 0)
586 // A method with different arity does not hide base member
587 if (mkind != MemberKind.Method && member.MemberName.Arity != entry.Arity)
590 bestCandidate = entry;
595 // Same kind of different arity is valid
597 if (member.MemberName.Arity != entry.Arity) {
601 if ((entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
602 if (entry.IsAccessor != member is AbstractPropertyEventMethod)
605 var pm = entry as IParametersMember;
606 if (!TypeSpecComparer.Override.IsEqual (pm.Parameters, member_param))
611 // Skip override for member with accessors. It may not fully implement the base member
612 // but keep flag we found an implementation in case the base member is abstract
614 if (member_with_accessors && ((entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.SEALED)) == Modifiers.OVERRIDE)) {
616 // Set candidate to override implementation to flag we found an implementation
623 // For members with parameters we can encounter an ambiguous candidates (they match exactly)
624 // because generic type parameters could be inflated into same types
626 if (ambig_candidate == null && (entry.Kind & mkind & (MemberKind.Method | MemberKind.Indexer)) != 0) {
627 bestCandidate = null;
628 ambig_candidate = entry;
632 bestCandidate = ambig_candidate;
637 if (container.IsInterface || ambig_candidate != null)
640 container = container.BaseType;
641 } while (container != null);
643 return ambig_candidate;
646 public static List<TypeSpec> GetDeclaredNestedTypes (TypeSpec container)
648 List<TypeSpec> found = null;
649 foreach (var entry in container.MemberCache.member_hash) {
650 foreach (var member in entry.Value) {
651 if ((member.Kind & MemberKind.NestedMask) == 0)
655 found = new List<TypeSpec> ();
657 found.Add ((TypeSpec)member);
665 // Returns inflated version of MemberSpec, it works similarly to
666 // SRE TypeBuilder.GetMethod
668 public static T GetMember<T> (TypeSpec container, T spec) where T : MemberSpec
670 IList<MemberSpec> applicable;
671 if (container.MemberCache.member_hash.TryGetValue (GetLookupName (spec), out applicable)) {
672 for (int i = applicable.Count - 1; i >= 0; i--) {
673 var entry = applicable[i];
674 if (entry.MemberDefinition == spec.MemberDefinition)
679 throw new InternalErrorException ("Missing member `{0}' on inflated type `{1}'",
680 spec.GetSignatureForError (), container.GetSignatureForError ());
683 static MemberKind GetMemberCoreKind (MemberCore member)
685 if (member is FieldBase)
686 return MemberKind.Field;
687 if (member is Indexer)
688 return MemberKind.Indexer;
690 return MemberKind.Class;
691 if (member is Struct)
692 return MemberKind.Struct;
693 if (member is Destructor)
694 return MemberKind.Destructor;
695 if (member is Method)
696 return MemberKind.Method;
697 if (member is Property)
698 return MemberKind.Property;
699 if (member is EventField)
700 return MemberKind.Event;
701 if (member is Interface)
702 return MemberKind.Interface;
703 if (member is EventProperty)
704 return MemberKind.Event;
705 if (member is Delegate)
706 return MemberKind.Delegate;
708 return MemberKind.Enum;
710 throw new NotImplementedException (member.GetType ().ToString ());
713 public static List<FieldSpec> GetAllFieldsForDefiniteAssignment (TypeSpec container, IMemberContext context)
715 List<FieldSpec> fields = null;
716 bool imported = container.MemberDefinition.IsImported;
717 foreach (var entry in container.MemberCache.member_hash) {
718 foreach (var name_entry in entry.Value) {
719 if (name_entry.Kind != MemberKind.Field)
722 if ((name_entry.Modifiers & Modifiers.STATIC) != 0)
726 // Fixed size buffers are not subject to definite assignment checking
728 if (name_entry is FixedFieldSpec || name_entry is ConstSpec)
731 var fs = (FieldSpec) name_entry;
732 if (imported && ShouldIgnoreFieldForDefiniteAssignment (fs, context))
735 //if ((fs.Modifiers & (Modifiers.BACKING_FIELD) != 0)
739 fields = new List<FieldSpec> ();
746 return fields ?? new List<FieldSpec> (0);
749 static bool ShouldIgnoreFieldForDefiniteAssignment (FieldSpec fs, IMemberContext context)
752 // LAMESPEC: This mimics csc quirk where definitive assignment is not done
753 // for all kinds of imported non-public struct fields
755 var mod = fs.Modifiers;
756 if ((mod & Modifiers.PRIVATE) == 0 && ((mod & Modifiers.INTERNAL) != 0 && fs.DeclaringType.MemberDefinition.IsInternalAsPublic (context.Module.DeclaringAssembly)))
760 // Ignore reference type fields except when type is an array or type parameter
762 var type = fs.MemberType;
764 case MemberKind.ArrayType:
765 case MemberKind.TypeParameter:
768 return TypeSpec.IsReferenceType (type);
772 public static IList<MemberSpec> GetCompletitionMembers (IMemberContext ctx, TypeSpec container, string name)
774 var matches = new List<MemberSpec> ();
775 foreach (var entry in container.MemberCache.member_hash) {
776 foreach (var name_entry in entry.Value) {
777 if (name_entry.IsAccessor)
780 if ((name_entry.Kind & (MemberKind.Constructor | MemberKind.Destructor | MemberKind.Operator)) != 0)
783 if (!name_entry.IsAccessible (ctx))
786 if (name == null || name_entry.Name.StartsWith (name)) {
787 matches.Add (name_entry);
796 // Returns members of @iface only, base members are ignored
798 public static List<MethodSpec> GetInterfaceMethods (TypeSpec iface)
801 // MemberCache flatten interfaces, therefore in cases like this one
803 // interface IA : IB {}
804 // interface IB { void Foo () }
806 // we would return Foo inside IA which is not expected in this case
808 var methods = new List<MethodSpec> ();
809 foreach (var entry in iface.MemberCache.member_hash.Values) {
810 foreach (var name_entry in entry) {
811 if (iface == name_entry.DeclaringType) {
812 if (name_entry.Kind == MemberKind.Method) {
813 methods.Add ((MethodSpec) name_entry);
823 // Returns all not implememted abstract members inside abstract type
824 // NOTE: Returned list is shared and must not be modified
826 public static IList<MethodSpec> GetNotImplementedAbstractMethods (TypeSpec type)
828 if (type.MemberCache.missing_abstract != null)
829 return type.MemberCache.missing_abstract;
831 var abstract_methods = new List<MethodSpec> ();
832 List<TypeSpec> hierarchy = null;
835 // Stage 1: top-to-bottom scan for abstract members
837 var abstract_type = type;
839 foreach (var entry in abstract_type.MemberCache.member_hash) {
840 foreach (var name_entry in entry.Value) {
841 if ((name_entry.Modifiers & Modifiers.ABSTRACT) == 0)
844 var ms = name_entry as MethodSpec;
848 abstract_methods.Add (ms);
852 var base_type = abstract_type.BaseType;
853 if (!base_type.IsAbstract)
856 if (hierarchy == null)
857 hierarchy = new List<TypeSpec> ();
859 hierarchy.Add (abstract_type);
860 abstract_type = base_type;
863 int not_implemented_count = abstract_methods.Count;
864 if (not_implemented_count == 0 || hierarchy == null) {
865 type.MemberCache.missing_abstract = abstract_methods;
866 return type.MemberCache.missing_abstract;
870 // Stage 2: Remove already implemented methods
872 foreach (var type_up in hierarchy) {
873 var members = type_up.MemberCache.member_hash;
874 if (members.Count == 0)
877 for (int i = 0; i < abstract_methods.Count; ++i) {
878 var candidate = abstract_methods [i];
879 if (candidate == null)
882 IList<MemberSpec> applicable;
883 if (!members.TryGetValue (candidate.Name, out applicable))
886 var filter = new MemberFilter (candidate);
887 foreach (var item in applicable) {
888 if ((item.Modifiers & (Modifiers.OVERRIDE | Modifiers.VIRTUAL)) == 0)
892 // Abstract override does not override anything
894 if ((item.Modifiers & Modifiers.ABSTRACT) != 0)
897 if (filter.Equals (item)) {
898 --not_implemented_count;
899 abstract_methods [i] = null;
906 if (not_implemented_count == abstract_methods.Count) {
907 type.MemberCache.missing_abstract = abstract_methods;
908 return type.MemberCache.missing_abstract;
911 var not_implemented = new MethodSpec[not_implemented_count];
913 foreach (var m in abstract_methods) {
917 not_implemented[counter++] = m;
920 type.MemberCache.missing_abstract = not_implemented;
921 return type.MemberCache.missing_abstract;
924 static string GetLookupName (MemberSpec ms)
926 if (ms.Kind == MemberKind.Indexer)
927 return IndexerNameAlias;
929 if (ms.Kind == MemberKind.Constructor) {
931 return Constructor.TypeConstructorName;
933 return Constructor.ConstructorName;
939 static string GetLookupName (MemberCore mc)
942 return IndexerNameAlias;
944 if (mc is Constructor)
945 return mc.IsStatic ? Constructor.TypeConstructorName : Constructor.ConstructorName;
947 return mc.MemberName.Name;
951 // Returns all operators declared on container and its base types (until declaredOnly is used)
953 public static IList<MemberSpec> GetUserOperator (TypeSpec container, Operator.OpType op, bool declaredOnly)
955 IList<MemberSpec> found = null;
956 bool shared_list = true;
957 IList<MemberSpec> applicable;
959 var mc = container.MemberCache;
961 if (((op == Operator.OpType.Implicit || op == Operator.OpType.Explicit) && (mc.state & StateFlags.HasConversionOperator) != 0) ||
962 (mc.state & StateFlags.HasUserOperator) != 0) {
964 if (mc.member_hash.TryGetValue (Operator.GetMetadataName (op), out applicable)) {
966 for (i = 0; i < applicable.Count; ++i) {
967 if (applicable[i].Kind != MemberKind.Operator) {
973 // Handles very rare case where a method with same name as operator (op_xxxx) exists
974 // and we have to resize the applicable list
976 if (i != applicable.Count) {
977 for (i = 0; i < applicable.Count; ++i) {
978 if (applicable[i].Kind != MemberKind.Operator) {
983 found = new List<MemberSpec> ();
984 found.Add (applicable[i]);
986 List<MemberSpec> prev;
989 prev = new List<MemberSpec> (found.Count + 1);
990 prev.AddRange (found);
992 prev = (List<MemberSpec>) found;
995 prev.Add (applicable[i]);
1003 List<MemberSpec> merged;
1005 shared_list = false;
1006 merged = new List<MemberSpec> (found.Count + applicable.Count);
1007 merged.AddRange (found);
1010 merged = (List<MemberSpec>) found;
1013 merged.AddRange (applicable);
1019 // BaseType call can be expensive
1023 container = container.BaseType;
1024 } while (container != null);
1030 // Inflates all member cache nested types
1032 public void InflateTypes (MemberCache inflated_cache, TypeParameterInflator inflator)
1034 foreach (var item in member_hash) {
1035 IList<MemberSpec> inflated_members = null;
1036 for (int i = 0; i < item.Value.Count; ++i ) {
1037 var member = item.Value[i];
1039 // FIXME: When inflating members refering nested types before they are inflated
1043 if ((member.Kind & MemberKind.NestedMask) != 0 &&
1044 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
1045 if (inflated_members == null) {
1046 inflated_members = new MemberSpec[item.Value.Count];
1047 inflated_cache.member_hash.Add (item.Key, inflated_members);
1050 inflated_members [i] = member.InflateMember (inflator);
1057 // Inflates all open type members, requires InflateTypes to be called before
1059 public void InflateMembers (MemberCache cacheToInflate, TypeSpec inflatedType, TypeParameterInflator inflator)
1061 var inflated_member_hash = cacheToInflate.member_hash;
1062 Dictionary<MemberSpec, MethodSpec> accessor_relation = null;
1063 List<MemberSpec> accessor_members = null;
1065 // Copy member specific flags when all members were added
1066 cacheToInflate.state = state;
1068 foreach (var item in member_hash) {
1069 var members = item.Value;
1070 IList<MemberSpec> inflated_members = null;
1071 for (int i = 0; i < members.Count; ++i ) {
1072 var member = members[i];
1075 // All nested types have been inflated earlier except for
1076 // compiler types which are created later and could miss InflateTypes
1078 if ((member.Kind & MemberKind.NestedMask) != 0 &&
1079 (member.Modifiers & Modifiers.COMPILER_GENERATED) == 0) {
1080 if (inflated_members == null)
1081 inflated_members = inflated_member_hash[item.Key];
1087 // Clone the container first
1089 if (inflated_members == null) {
1090 inflated_members = new MemberSpec [item.Value.Count];
1091 inflated_member_hash.Add (item.Key, inflated_members);
1094 var local_inflator = inflator;
1096 if (member.DeclaringType != inflatedType) {
1098 // Don't inflate top-level non-generic interface members
1099 // merged into generic interface
1101 if (!member.DeclaringType.IsGeneric && !member.DeclaringType.IsNested) {
1102 inflated_members [i] = member;
1107 // Needed when inflating flatten interfaces. It inflates
1108 // container type only, type parameters are already done
1110 // Handles cases like:
1112 // interface I<T> {}
1113 // interface I<U, V> : I<U> {}
1115 // class C: I<int, bool> {}
1117 var inflated_parent = inflator.Inflate (member.DeclaringType);
1118 if (inflated_parent != inflator.TypeInstance)
1119 local_inflator = new TypeParameterInflator (inflator, inflated_parent);
1123 // Inflate every member, its parent is now different
1125 var inflated = member.InflateMember (local_inflator);
1126 inflated_members [i] = inflated;
1128 if (member is PropertySpec || member is EventSpec) {
1129 if (accessor_members == null)
1130 accessor_members = new List<MemberSpec> ();
1132 accessor_members.Add (inflated);
1136 if (member.IsAccessor) {
1137 if (accessor_relation == null)
1138 accessor_relation = new Dictionary<MemberSpec, MethodSpec> ();
1139 accessor_relation.Add (member, (MethodSpec) inflated);
1144 if (accessor_members != null) {
1145 foreach (var member in accessor_members) {
1146 var prop = member as PropertySpec;
1148 if (prop.Get != null)
1149 prop.Get = accessor_relation[prop.Get];
1150 if (prop.Set != null)
1151 prop.Set = accessor_relation[prop.Set];
1156 var ev = (EventSpec) member;
1157 ev.AccessorAdd = accessor_relation[ev.AccessorAdd];
1158 ev.AccessorRemove = accessor_relation[ev.AccessorRemove];
1164 // Removes hidden base members of an interface. For compiled interfaces we cannot
1165 // do name filtering during Add (as we do for import) because we need all base
1166 // names to be valid during type definition.
1167 // Add replaces hidden base member with current one which means any name collision
1168 // (CS0108) of non-first name would be unnoticed because the name was replaced
1169 // with the one from compiled type
1171 public void RemoveHiddenMembers (TypeSpec container)
1173 foreach (var entry in member_hash) {
1174 var values = entry.Value;
1176 int container_members_start_at = 0;
1177 while (values[container_members_start_at].DeclaringType != container && ++container_members_start_at < entry.Value.Count);
1179 if (container_members_start_at == 0 || container_members_start_at == values.Count)
1182 for (int i = 0; i < container_members_start_at; ++i) {
1183 var member = values[i];
1185 if (!container.ImplementsInterface (member.DeclaringType, false))
1188 var member_param = member is IParametersMember ? ((IParametersMember) member).Parameters : ParametersCompiled.EmptyReadOnlyParameters;
1190 for (int ii = container_members_start_at; ii < values.Count; ++ii) {
1191 var container_entry = values[ii];
1193 if (container_entry.Arity != member.Arity)
1196 if (container_entry is IParametersMember) {
1197 if (!TypeSpecComparer.Override.IsEqual (((IParametersMember) container_entry).Parameters, member_param))
1201 values.RemoveAt (i);
1202 --container_members_start_at;
1211 // Checks all appropriate container members for CLS compliance
1213 public void VerifyClsCompliance (TypeSpec container, Report report)
1215 if (locase_members != null)
1218 if (container.BaseType == null) {
1219 locase_members = new Dictionary<string, MemberSpec[]> (member_hash.Count); // StringComparer.OrdinalIgnoreCase);
1221 var btype = container.BaseType.GetDefinition ();
1222 btype.MemberCache.VerifyClsCompliance (btype, report);
1223 locase_members = new Dictionary<string, MemberSpec[]> (btype.MemberCache.locase_members); //, StringComparer.OrdinalIgnoreCase);
1226 var is_imported_type = container.MemberDefinition.IsImported;
1227 foreach (var entry in container.MemberCache.member_hash) {
1228 for (int i = 0; i < entry.Value.Count; ++i ) {
1229 var name_entry = entry.Value[i];
1230 if ((name_entry.Modifiers & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
1233 if ((name_entry.Modifiers & (Modifiers.OVERRIDE | Modifiers.COMPILER_GENERATED)) != 0)
1236 if ((name_entry.Kind & MemberKind.MaskType) == 0)
1239 if (name_entry.MemberDefinition.CLSAttributeValue == false)
1242 IParametersMember p_a = null;
1243 if (!is_imported_type) {
1244 p_a = name_entry as IParametersMember;
1245 if (p_a != null && !name_entry.IsAccessor) {
1246 var p_a_pd = p_a.Parameters;
1248 // Check differing overloads in @container
1250 for (int ii = i + 1; ii < entry.Value.Count; ++ii) {
1251 var checked_entry = entry.Value[ii];
1252 IParametersMember p_b = checked_entry as IParametersMember;
1256 if (p_a_pd.Count != p_b.Parameters.Count)
1259 if (checked_entry.IsAccessor)
1262 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1264 ReportOverloadedMethodClsDifference (name_entry, checked_entry, res, report);
1270 if (i > 0 || name_entry.Kind == MemberKind.Constructor || name_entry.Kind == MemberKind.Indexer)
1273 var name_entry_locase = name_entry.Name.ToLowerInvariant ();
1276 if (!locase_members.TryGetValue (name_entry_locase, out found)) {
1277 found = new MemberSpec[] { name_entry };
1278 locase_members.Add (name_entry_locase, found);
1280 bool same_names_only = true;
1281 foreach (var f in found) {
1282 if (f.Name == name_entry.Name) {
1284 IParametersMember p_b = f as IParametersMember;
1288 if (p_a.Parameters.Count != p_b.Parameters.Count)
1294 var res = ParametersCompiled.IsSameClsSignature (p_a.Parameters, p_b.Parameters);
1296 ReportOverloadedMethodClsDifference (f, name_entry, res, report);
1303 same_names_only = false;
1304 if (!is_imported_type) {
1305 var last = GetLaterDefinedMember (f, name_entry);
1306 if (last == f.MemberDefinition) {
1307 report.SymbolRelatedToPreviousError (name_entry);
1309 report.SymbolRelatedToPreviousError (f);
1312 report.Warning (3005, 1, last.Location,
1313 "Identifier `{0}' differing only in case is not CLS-compliant", last.GetSignatureForError ());
1317 if (!same_names_only) {
1318 Array.Resize (ref found, found.Length + 1);
1319 found[found.Length - 1] = name_entry;
1320 locase_members[name_entry_locase] = found;
1328 // Local report helper to issue correctly ordered members stored in hashtable
1330 static MemberCore GetLaterDefinedMember (MemberSpec a, MemberSpec b)
1332 var mc_a = a.MemberDefinition as MemberCore;
1333 var mc_b = b.MemberDefinition as MemberCore;
1340 if (a.DeclaringType.MemberDefinition != b.DeclaringType.MemberDefinition)
1343 if (mc_a.Location.File != mc_b.Location.File)
1346 return mc_b.Location.Row > mc_a.Location.Row ? mc_b : mc_a;
1349 static void ReportOverloadedMethodClsDifference (MemberSpec a, MemberSpec b, int res, Report report)
1351 var last = GetLaterDefinedMember (a, b);
1352 if (last == a.MemberDefinition) {
1353 report.SymbolRelatedToPreviousError (b);
1355 report.SymbolRelatedToPreviousError (a);
1358 if ((res & 1) != 0) {
1359 report.Warning (3006, 1, last.Location,
1360 "Overloaded method `{0}' differing only in ref or out, or in array rank, is not CLS-compliant",
1361 last.GetSignatureForError ());
1364 if ((res & 2) != 0) {
1365 report.Warning (3007, 1, last.Location,
1366 "Overloaded method `{0}' differing only by unnamed array types is not CLS-compliant",
1367 last.GetSignatureForError ());
1371 public bool CheckExistingMembersOverloads (MemberCore member, AParametersCollection parameters)
1373 var name = GetLookupName (member);
1374 var imb = member as InterfaceMemberBase;
1375 if (imb != null && imb.IsExplicitImpl) {
1376 name = imb.GetFullName (name);
1379 return CheckExistingMembersOverloads (member, name, parameters);
1382 public bool CheckExistingMembersOverloads (MemberCore member, string name, AParametersCollection parameters)
1384 IList<MemberSpec> entries;
1385 if (!member_hash.TryGetValue (name, out entries))
1388 var Report = member.Compiler.Report;
1390 int method_param_count = parameters.Count;
1391 for (int i = entries.Count - 1; i >= 0; --i) {
1392 var ce = entries[i];
1393 var pm = ce as IParametersMember;
1394 var pd = pm == null ? ParametersCompiled.EmptyReadOnlyParameters : pm.Parameters;
1395 if (pd.Count != method_param_count)
1398 if (ce.Arity != member.MemberName.Arity)
1401 // Ignore merged interface members
1402 if (member.Parent.PartialContainer != ce.DeclaringType.MemberDefinition)
1405 var p_types = pd.Types;
1406 if (method_param_count > 0) {
1407 int ii = method_param_count - 1;
1408 TypeSpec type_a, type_b;
1410 type_a = parameters.Types [ii];
1411 type_b = p_types [ii];
1413 var a_byref = (pd.FixedParameters[ii].ModFlags & Parameter.Modifier.RefOutMask) != 0;
1414 var b_byref = (parameters.FixedParameters[ii].ModFlags & Parameter.Modifier.RefOutMask) != 0;
1416 if (a_byref != b_byref)
1419 } while (TypeSpecComparer.Override.IsEqual (type_a, type_b) && ii-- != 0);
1425 // Operators can differ in return type only
1427 if (member is Operator && ce.Kind == MemberKind.Operator && ((MethodSpec) ce).ReturnType != ((Operator) member).ReturnType)
1431 // Report difference in parameter modifiers only
1433 if (pd != null && member is MethodCore) {
1434 ii = method_param_count;
1436 (parameters.FixedParameters[ii].ModFlags & Parameter.Modifier.ModifierMask) ==
1437 (pd.FixedParameters[ii].ModFlags & Parameter.Modifier.ModifierMask) &&
1438 parameters.ExtensionMethodType == pd.ExtensionMethodType) ;
1441 var mc = ce as MethodSpec;
1442 member.Compiler.Report.SymbolRelatedToPreviousError (ce);
1443 if ((member.ModFlags & Modifiers.PARTIAL) != 0 && (mc.Modifiers & Modifiers.PARTIAL) != 0) {
1444 if (parameters.HasParams || pd.HasParams) {
1445 Report.Error (758, member.Location,
1446 "A partial method declaration and partial method implementation cannot differ on use of `params' modifier");
1448 Report.Error (755, member.Location,
1449 "A partial method declaration and partial method implementation must be both an extension method or neither");
1451 } else if (member is Constructor) {
1452 Report.Error (851, member.Location,
1453 "Overloaded contructor `{0}' cannot differ on use of parameter modifiers only",
1454 member.GetSignatureForError ());
1456 Report.Error (663, member.Location,
1457 "Overloaded method `{0}' cannot differ on use of parameter modifiers only",
1458 member.GetSignatureForError ());
1465 if ((ce.Kind & MemberKind.Method) != 0) {
1466 Method method_a = member as Method;
1467 Method method_b = ce.MemberDefinition as Method;
1468 if (method_a != null && method_b != null && (method_a.ModFlags & method_b.ModFlags & Modifiers.PARTIAL) != 0) {
1469 const Modifiers partial_modifiers = Modifiers.STATIC | Modifiers.UNSAFE;
1470 if (method_a.IsPartialDefinition == method_b.IsPartialImplementation) {
1471 if ((method_a.ModFlags & partial_modifiers) == (method_b.ModFlags & partial_modifiers) ||
1472 method_a.Parent.IsUnsafe && method_b.Parent.IsUnsafe) {
1473 if (method_a.IsPartialImplementation) {
1474 method_a.SetPartialDefinition (method_b);
1475 if (entries.Count == 1)
1476 member_hash.Remove (name);
1478 entries.RemoveAt (i);
1480 method_b.SetPartialDefinition (method_a);
1481 method_a.caching_flags |= MemberCore.Flags.PartialDefinitionExists;
1486 if (method_a.IsStatic != method_b.IsStatic) {
1487 Report.SymbolRelatedToPreviousError (ce);
1488 Report.Error (763, member.Location,
1489 "A partial method declaration and partial method implementation must be both `static' or neither");
1492 if ((method_a.ModFlags & Modifiers.UNSAFE) != (method_b.ModFlags & Modifiers.UNSAFE)) {
1493 Report.SymbolRelatedToPreviousError (ce);
1494 Report.Error (764, member.Location,
1495 "A partial method declaration and partial method implementation must be both `unsafe' or neither");
1501 Report.SymbolRelatedToPreviousError (ce);
1502 if (method_a.IsPartialDefinition) {
1503 Report.Error (756, member.Location, "A partial method `{0}' declaration is already defined",
1504 member.GetSignatureForError ());
1507 Report.Error (757, member.Location, "A partial method `{0}' implementation is already defined",
1508 member.GetSignatureForError ());
1512 Report.SymbolRelatedToPreviousError (ce);
1514 bool is_reserved_a = member is AbstractPropertyEventMethod || member is Operator;
1515 bool is_reserved_b = ((MethodSpec) ce).IsReservedMethod;
1517 if (is_reserved_a || is_reserved_b) {
1518 Report.Error (82, member.Location, "A member `{0}' is already reserved",
1520 ce.GetSignatureForError () :
1521 member.GetSignatureForError ());
1525 Report.SymbolRelatedToPreviousError (ce);
1528 if (member is Operator && ce.Kind == MemberKind.Operator) {
1529 Report.Error (557, member.Location, "Duplicate user-defined conversion in type `{0}'",
1530 member.Parent.GetSignatureForError ());
1534 Report.Error (111, member.Location,
1535 "A member `{0}' is already defined. Rename this member or use different parameter types",
1536 member.GetSignatureForError ());