2009-06-23 Marek Safar <marek.safar@gmail.com>
[mono.git] / mcs / mcs / decl.cs
index 4a4c03f4317eaeb23e60259c8de24df3ee448ab6..6b341f0de709f57eaea7ab56f55ae425ca5b0d56 100644 (file)
@@ -349,14 +349,21 @@ namespace Mono.CSharp {
                                }
                        } else {
                                if ((ModFlags & (Modifiers.ABSTRACT | Modifiers.EXTERN | Modifiers.PARTIAL)) == 0) {
-                                       if (RootContext.Version >= LanguageVersion.LINQ && this is Property.PropertyMethod &&
-                                               !(this is Indexer.GetIndexerMethod || this is Indexer.SetIndexerMethod)) {
-                                               Report.Error (840, Location, "`{0}' must have a body because it is not marked abstract or extern. The property can be automatically implemented when you define both accessors",
-                                                             GetSignatureForError ());
-                                       } else {
-                                               Report.Error (501, Location, "`{0}' must have a body because it is not marked abstract, extern, or partial",
-                                                             GetSignatureForError ());
+                                       if (RootContext.Version >= LanguageVersion.V_3) {
+                                               Property.PropertyMethod pm = this as Property.PropertyMethod;
+                                               if (pm is Indexer.GetIndexerMethod || pm is Indexer.SetIndexerMethod)
+                                                       pm = null;
+
+                                               if (pm != null && (pm.Property.Get.IsDummy || pm.Property.Set.IsDummy)) {
+                                                       Report.Error (840, Location,
+                                                               "`{0}' must have a body because it is not marked abstract or extern. The property can be automatically implemented when you define both accessors",
+                                                               GetSignatureForError ());
+                                                       return false;
+                                               }
                                        }
+
+                                       Report.Error (501, Location, "`{0}' must have a body because it is not marked abstract, extern, or partial",
+                                                     GetSignatureForError ());
                                        return false;
                                }
                        }
@@ -381,8 +388,8 @@ namespace Mono.CSharp {
                                return;
                        }
 
-                       if (((Parent.ModFlags & Modifiers.SEALED) != 0) &&
-                               ((ModFlags & Modifiers.OVERRIDE) == 0) && (Name != "Finalize")) {
+                       if ((Parent.ModFlags & Modifiers.SEALED) != 0 && (ModFlags & Modifiers.OVERRIDE) == 0 &&
+                               !(this is Destructor)) {
                                Report.Warning (628, 4, Location, "`{0}': new protected member declared in sealed class",
                                        GetSignatureForError ());
                                return;
@@ -451,10 +458,10 @@ namespace Mono.CSharp {
 
                        caching_flags &= ~Flags.Obsolete_Undetected;
 
-                       if (OptAttributes == null || TypeManager.obsolete_attribute_type == null)
+                       if (OptAttributes == null)
                                return null;
 
-                       Attribute obsolete_attr = OptAttributes.Search (TypeManager.obsolete_attribute_type);
+                       Attribute obsolete_attr = OptAttributes.Search (PredefinedAttributes.Get.Obsolete);
                        if (obsolete_attr == null)
                                return null;
 
@@ -550,17 +557,15 @@ namespace Mono.CSharp {
                        while (TypeManager.HasElementType (p))
                                p = TypeManager.GetElementType (p);
 
-#if GMCS_SOURCE
-                       if (p.IsGenericParameter)
+                       if (TypeManager.IsGenericParameter (p))
                                return true;
 
                        if (TypeManager.IsGenericType (p)) {
-                               foreach (Type t in p.GetGenericArguments ()) {
+                               foreach (Type t in TypeManager.GetTypeArguments (p)) {
                                        if (!IsAccessibleAs (t))
                                                return false;
                                }
                        }
-#endif
 
                        for (Type p_parent = null; p != null; p = p_parent) {
                                p_parent = p.DeclaringType;
@@ -676,9 +681,9 @@ namespace Mono.CSharp {
 
                        caching_flags &= ~Flags.HasCompliantAttribute_Undetected;
 
-                       if (OptAttributes != null && TypeManager.cls_compliant_attribute_type != null) {
+                       if (OptAttributes != null) {
                                Attribute cls_attribute = OptAttributes.Search (
-                                       TypeManager.cls_compliant_attribute_type);
+                                       PredefinedAttributes.Get.CLSCompliant);
                                if (cls_attribute != null) {
                                        caching_flags |= Flags.HasClsCompliantAttribute;
                                        bool value = cls_attribute.GetClsCompliantAttributeValue ();
@@ -729,24 +734,31 @@ namespace Mono.CSharp {
                {
                        if (!IsClsComplianceRequired ()) {
                                if (HasClsCompliantAttribute && Report.WarningLevel >= 2) {
-                                       if (!IsExposedFromAssembly ())
-                                               Report.Warning (3019, 2, Location, "CLS compliance checking will not be performed on `{0}' because it is not visible from outside this assembly", GetSignatureForError ());
-                                       if (!CodeGen.Assembly.IsClsCompliant)
-                                               Report.Warning (3021, 2, Location, "`{0}' does not need a CLSCompliant attribute because the assembly is not marked as CLS-compliant", GetSignatureForError ());
+                                       if (!IsExposedFromAssembly ()) {
+                                               Attribute a = OptAttributes.Search (PredefinedAttributes.Get.CLSCompliant);
+                                               Report.Warning (3019, 2, a.Location, "CLS compliance checking will not be performed on `{0}' because it is not visible from outside this assembly", GetSignatureForError ());
+                                       }
+
+                                       if (!CodeGen.Assembly.IsClsCompliant) {
+                                               Attribute a = OptAttributes.Search (PredefinedAttributes.Get.CLSCompliant);
+                                               Report.Warning (3021, 2, a.Location, "`{0}' does not need a CLSCompliant attribute because the assembly is not marked as CLS-compliant", GetSignatureForError ());
+                                       }
                                }
                                return false;
                        }
 
                        if (HasClsCompliantAttribute) {
                                if (CodeGen.Assembly.ClsCompliantAttribute == null && !CodeGen.Assembly.IsClsCompliant) {
-                                       Report.Warning (3014, 1, Location,
+                                       Attribute a = OptAttributes.Search (PredefinedAttributes.Get.CLSCompliant);
+                                       Report.Warning (3014, 1, a.Location,
                                                "`{0}' cannot be marked as CLS-compliant because the assembly is not marked as CLS-compliant",
                                                GetSignatureForError ());
                                        return false;
                                }
 
                                if (!Parent.IsClsComplianceRequired ()) {
-                                       Report.Warning (3018, 1, Location, "`{0}' cannot be marked as CLS-compliant because it is a member of non CLS-compliant type `{1}'", 
+                                       Attribute a = OptAttributes.Search (PredefinedAttributes.Get.CLSCompliant);
+                                       Report.Warning (3018, 1, a.Location, "`{0}' cannot be marked as CLS-compliant because it is a member of non CLS-compliant type `{1}'", 
                                                GetSignatureForError (), Parent.GetSignatureForError ());
                                        return false;
                                }
@@ -864,6 +876,8 @@ namespace Mono.CSharp {
 
                protected readonly bool is_generic;
                readonly int count_type_params;
+               protected TypeParameter[] type_params;
+               TypeParameter[] type_param_list;
 
                //
                // Whether we are Generic
@@ -913,6 +927,9 @@ namespace Mono.CSharp {
                                return true;
                        }
 
+                       if (((mc.ModFlags | symbol.ModFlags) & Modifiers.COMPILER_GENERATED) != 0)
+                               return true;
+
                        if (symbol.EnableOverloadChecks (mc))
                                return true;
 
@@ -922,7 +939,7 @@ namespace Mono.CSharp {
                                return false;
                        }
 
-                       if (this is RootTypes) {
+                       if (this is ModuleContainer) {
                                Report.Error (101, symbol.Location, 
                                        "The namespace `{0}' already contains a definition for `{1}'",
                                        ((DeclSpace)symbol).NamespaceEntry.GetSignatureForError (), symbol.MemberName.Name);
@@ -966,6 +983,11 @@ namespace Mono.CSharp {
                        get { return (Parent != null && Parent.Parent == null); }
                }
 
+               public virtual bool IsUnmanagedType ()
+               {
+                       return false;
+               }
+
                public virtual void CloseType ()
                {
                        if ((caching_flags & Flags.CloseTypeCreated) == 0){
@@ -988,7 +1010,7 @@ namespace Mono.CSharp {
                }
 
                protected virtual TypeAttributes TypeAttr {
-                       get { return CodeGen.Module.DefaultCharSetType; }
+                       get { return Module.DefaultCharSetType; }
                }
 
                /// <remarks>
@@ -1005,7 +1027,6 @@ namespace Mono.CSharp {
 
                public override void Emit ()
                {
-#if GMCS_SOURCE
                        if (type_params != null) {
                                int offset = count_type_params - type_params.Length;
                                for (int i = offset; i < type_params.Length; i++)
@@ -1013,8 +1034,7 @@ namespace Mono.CSharp {
                        }
 
                        if ((ModFlags & Modifiers.COMPILER_GENERATED) != 0 && !Parent.IsCompilerGenerated)
-                               TypeBuilder.SetCustomAttribute (TypeManager.GetCompilerGeneratedAttribute (Location));
-#endif
+                               PredefinedAttributes.Get.CompilerGenerated.EmitAttribute (TypeBuilder);
 
                        base.Emit ();
                }
@@ -1026,8 +1046,8 @@ namespace Mono.CSharp {
                
                public bool CheckAccessLevel (Type check_type)
                {
-                       TypeBuilder tb = TypeBuilder;
-#if GMCS_SOURCE
+                       Type tb = TypeBuilder;
+
                        if (this is GenericMethod) {
                                tb = Parent.TypeBuilder;
 
@@ -1036,18 +1056,22 @@ namespace Mono.CSharp {
                                if (TypeBuilder == null)
                                        return true;
                        }
-#endif
 
                        check_type = TypeManager.DropGenericTypeArguments (check_type);
                        if (check_type == tb)
                                return true;
 
+                       // TODO: When called from LocalUsingAliasEntry tb is null
+                       // because we are in RootDeclSpace
+                       if (tb == null)
+                               tb = typeof (RootDeclSpace);
+
                        //
                        // Broken Microsoft runtime, return public for arrays, no matter what 
                        // the accessibility is for their underlying class, and they return 
                        // NonPublic visibility for pointers
                        //
-                       if (check_type.IsArray || check_type.IsPointer)
+                       if (TypeManager.HasElementType (check_type))
                                return CheckAccessLevel (TypeManager.GetElementType (check_type));
 
                        TypeAttributes check_attr = check_type.Attributes & TypeAttributes.VisibilityMask;
@@ -1147,7 +1171,6 @@ namespace Mono.CSharp {
                                if ((t == null) || !CheckAccessLevel (t))
                                        continue;
 
-#if GMCS_SOURCE
                                if (!TypeManager.IsGenericType (current_type))
                                        return t;
 
@@ -1156,6 +1179,7 @@ namespace Mono.CSharp {
                                for (int i = 0; i < args.Length; i++)
                                        targs [i] = args [i];
 
+#if GMCS_SOURCE
                                t = t.MakeGenericType (targs);
 #endif
 
@@ -1219,21 +1243,19 @@ namespace Mono.CSharp {
                        get;
                }
 
-               public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
+               public virtual ModuleContainer Module {
+                       get { return Parent.Module; }
+               }
+
+               public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb, PredefinedAttributes pa)
                {
-                       if (a.Type == TypeManager.required_attr_type) {
+                       if (a.Type == pa.Required) {
                                Report.Error (1608, a.Location, "The RequiredAttribute attribute is not permitted on C# types");
                                return;
                        }
                        TypeBuilder.SetCustomAttribute (cb);
                }
 
-               //
-               // Extensions for generics
-               //
-               protected TypeParameter[] type_params;
-               TypeParameter[] type_param_list;
-
                TypeParameter[] initialize_type_params ()
                {
                        if (type_param_list != null)
@@ -1312,9 +1334,14 @@ namespace Mono.CSharp {
                                        }
                                }
 
+                               Variance variance = name.Variance;
+                               if (name.Variance != Variance.None && !(this is Delegate || this is Interface)) {
+                                       Report.Error (1960, name.Location, "Variant type parameters can only be used with interfaces and delegates");
+                                       variance = Variance.None;
+                               }
+
                                type_params [i] = new TypeParameter (
-                                       Parent, this, name.Name, constraints, name.OptAttributes,
-                                       Location);
+                                       Parent, this, name.Name, constraints, name.OptAttributes, variance, Location);
 
                                AddToContainer (type_params [i], name.Name);
                        }
@@ -2287,9 +2314,6 @@ namespace Mono.CSharp {
                                return null;
 
                        EntryType entry_type = EntryType.Static | EntryType.Method | EntryType.NotExtensionMethod;
-                       if (publicOnly) {
-                               entry_type |= EntryType.Public;
-                       }
                        EntryType found_entry_type = entry_type & ~EntryType.NotExtensionMethod;
 
                        ArrayList candidates = null;
@@ -2297,6 +2321,16 @@ namespace Mono.CSharp {
                                if ((entry.EntryType & entry_type) == found_entry_type) {
                                        MethodBase mb = (MethodBase)entry.Member;
 
+                                       // Simple accessibility check
+                                       if ((entry.EntryType & EntryType.Public) == 0 && publicOnly) {
+                                               MethodAttributes ma = mb.Attributes & MethodAttributes.MemberAccessMask;
+                                               if (ma != MethodAttributes.Assembly && ma != MethodAttributes.FamORAssem)
+                                                       continue;
+                                               
+                                               if (!TypeManager.IsThisOrFriendAssembly (mb.DeclaringType.Assembly))
+                                                       continue;
+                                       }
+
                                        IMethodData md = TypeManager.GetMethod (mb);
                                        AParametersCollection pd = md == null ?
                                                TypeManager.GetParameterData (mb) : md.ParameterInfo;
@@ -2353,7 +2387,7 @@ namespace Mono.CSharp {
                                if (is_property) {
                                        if ((entry.EntryType & EntryType.Field) != 0) {
                                                fi = (FieldInfo)entry.Member;
-                                               cmp_attrs = Parameters.EmptyReadOnlyParameters;
+                                               cmp_attrs = ParametersCompiled.EmptyReadOnlyParameters;
                                        } else {
                                                pi = (PropertyInfo) entry.Member;
                                                cmp_attrs = TypeManager.GetParameterData (pi);
@@ -2383,7 +2417,7 @@ namespace Mono.CSharp {
                                                //
                                                // Check for assembly methods
                                                //
-                                               if (mi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
+                                               if (fi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
                                                        continue;
                                                break;
                                        }
@@ -2621,7 +2655,7 @@ namespace Mono.CSharp {
                        }
                }
 
-               public bool CheckExistingMembersOverloads (MemberCore member, string name, Parameters parameters)
+               public bool CheckExistingMembersOverloads (MemberCore member, string name, ParametersCompiled parameters)
                {
                        ArrayList entries = (ArrayList)member_hash [name];
                        if (entries == null)
@@ -2641,12 +2675,12 @@ namespace Mono.CSharp {
                                        p_types = pd.Types;
                                } else {
                                        MethodBase mb = (MethodBase) ce.Member;
-#if GMCS_SOURCE                                        
+               
                                        // TODO: This is more like a hack, because we are adding generic methods
                                        // twice with and without arity name
-                                       if (mb.IsGenericMethod && !member.MemberName.IsGeneric)
+                                       if (TypeManager.IsGenericMethod (mb) && !member.MemberName.IsGeneric)
                                                continue;
-#endif                 
+
                                        pd = TypeManager.GetParameterData (mb);
                                        p_types = pd.Types;
                                }
@@ -2662,11 +2696,11 @@ namespace Mono.CSharp {
                                                type_b = p_types [ii];
 
 #if GMCS_SOURCE
-                                               if (type_a.IsGenericParameter && type_a.DeclaringMethod != null)
-                                                       type_a = null;
+                                               if (TypeManager.IsGenericParameter (type_a) && type_a.DeclaringMethod != null)
+                                                       type_a = typeof (TypeParameter);
 
-                                               if (type_b.IsGenericParameter && type_b.DeclaringMethod != null)
-                                                       type_b = null;
+                                               if (TypeManager.IsGenericParameter (type_b) && type_b.DeclaringMethod != null)
+                                                       type_b = typeof (TypeParameter);
 #endif
                                                if ((pd.FixedParameters [ii].ModFlags & Parameter.Modifier.ISBYREF) !=
                                                        (parameters.FixedParameters [ii].ModFlags & Parameter.Modifier.ISBYREF))
@@ -2706,9 +2740,15 @@ namespace Mono.CSharp {
                                                                                "A partial method declaration and partial method implementation must be both an extension method or neither");
                                                                }
                                                        } else {
-                                                               Report.Error (663, member.Location,
-                                                                       "An overloaded method `{0}' cannot differ on use of parameter modifiers only",
-                                                                       member.GetSignatureForError ());
+                                                               if (member is Constructor) {
+                                                                       Report.Error (851, member.Location,
+                                                                               "Overloaded contructor `{0}' cannot differ on use of parameter modifiers only",
+                                                                               member.GetSignatureForError ());
+                                                               } else {
+                                                                       Report.Error (663, member.Location,
+                                                                               "Overloaded method `{0}' cannot differ on use of parameter modifiers only",
+                                                                               member.GetSignatureForError ());
+                                                               }
                                                        }
                                                        return false;
                                                }