2005-10-20 Robert Jordan <robertj@gmx.net>
[mono.git] / mcs / gmcs / decl.cs
index e83cc28ef42d914bdcb27f8ec58143204761c938..71dbd091080cb18d09b32844618ac9080801a272 100644 (file)
@@ -27,56 +27,82 @@ namespace Mono.CSharp {
                public readonly TypeArguments TypeArguments;
 
                public readonly MemberName Left;
+               public readonly Location Location;
+
+               public static readonly MemberName Null = new MemberName ("", Location.Null);
 
-               public static readonly MemberName Null = new MemberName ("");
+               bool is_double_colon;
 
-               public MemberName (string name)
+               private MemberName (MemberName left, string name, bool is_double_colon,
+                                   TypeArguments args, Location loc)
                {
                        this.Name = name;
+                       this.Location = loc;
+                       this.is_double_colon = is_double_colon;
+                       this.TypeArguments = args;
+                       this.Left = left;
                }
 
-               public MemberName (string name, TypeArguments args)
-                       : this (name)
+               public MemberName (string name, TypeArguments args, Location loc)
+                       : this (name, loc)
                {
                        this.TypeArguments = args;
                }
 
-               public MemberName (MemberName left, string name)
-                       : this (left, name, null)
+               public MemberName (string name, Location loc)
                {
+                       this.Name = name;
+                       this.Location = loc;
                }
 
-               public MemberName (MemberName left, string name, TypeArguments args)
-                       : this (name, args)
+               public MemberName (MemberName left, string name, Location loc)
+                       : this (name, loc)
                {
                        this.Left = left;
                }
 
+               public MemberName (MemberName left, string name, TypeArguments args, Location loc)
+                       : this (name, args, loc)
+               {
+                       this.Left = left;
+               }
+
+               public MemberName (string alias, string name, Location loc)
+                       : this (new MemberName (alias, loc), name, true, null, loc)
+               {
+               }
+
                public MemberName (MemberName left, MemberName right)
-                       : this (left, right.Name, right.TypeArguments)
+                       : this (left, right, left != null ? left.Location : right != null ? right.Location : Location.Null)
+               {
+               }
+
+               public MemberName (MemberName left, MemberName right, Location loc)
+                       : this (null, right.Name, false, right.TypeArguments, loc)
                {
-                       Name = right.Name;
-                       Left = (right.Left == null) ? left : new MemberName (left, right.Left);
-                       TypeArguments = right.TypeArguments;
+                       if (right.is_double_colon)
+                               throw new InternalErrorException ("Cannot append double_colon member name");
+                       this.Left = (right.Left == null) ? left : new MemberName (left, right.Left);
                }
 
                static readonly char [] dot_array = { '.' };
 
-               public static MemberName FromDotted (string name)
+               public static MemberName FromDotted (string name, Location loc)
                {
                        string [] elements = name.Split (dot_array);
                        int count = elements.Length;
                        int i = 0;
-                       MemberName n = new MemberName (elements [i++]);
+                       MemberName n = new MemberName (elements [i++], loc);
                        while (i < count)
-                               n = new MemberName (n, elements [i++]);
+                               n = new MemberName (n, elements [i++], loc);
                        return n;
                }
 
                public string GetName ()
                {
+                       string connect = is_double_colon ? "::" : ".";
                        if (Left != null)
-                               return Left.GetName () + "." + Name;
+                               return Left.GetName () + connect + Name;
                        else
                                return Name;
                }
@@ -95,8 +121,9 @@ namespace Mono.CSharp {
                public string GetName (bool is_generic)
                {
                        string name = is_generic ? Basename : Name;
+                       string connect = is_double_colon ? "::" : ".";
                        if (Left != null)
-                               return Left.GetName (is_generic) + "." + name;
+                               return Left.GetName (is_generic) + connect + name;
                        else
                                return name;
                }
@@ -112,8 +139,9 @@ namespace Mono.CSharp {
 
                public string MethodName {
                        get {
+                               string connect = is_double_colon ? "::" : ".";
                                if (Left != null)
-                                       return Left.FullName + "." + Name;
+                                       return Left.FullName + connect + Name;
                                else
                                        return Name;
                        }
@@ -134,8 +162,9 @@ namespace Mono.CSharp {
 
                public string GetTypeName ()
                {
+                       string connect = is_double_colon ? "::" : ".";
                        if (Left != null)
-                               return Left.GetTypeName () + "." +
+                               return Left.GetTypeName () + connect +
                                        MakeName (Name, TypeArguments);
                        else
                                return MakeName (Name, TypeArguments);
@@ -164,33 +193,36 @@ namespace Mono.CSharp {
                        return true;
                }
 
-               public Expression GetTypeExpression (Location loc)
+               public Expression GetTypeExpression ()
                {
                        if (IsUnbound) {
-                               if (!CheckUnbound (loc))
+                               if (!CheckUnbound (Location))
                                        return null;
 
-                               return new UnboundTypeExpression (this, loc);
+                               return new UnboundTypeExpression (this, Location);
                        }
 
-                       if (Left != null) {
-                               Expression lexpr = Left.GetTypeExpression (loc);
-
-                               return new MemberAccess (lexpr, Name, TypeArguments, loc);
-                       } else {
+                       if (Left == null) {
                                if (TypeArguments != null)
-                                       return new SimpleName (Basename, TypeArguments, loc);
+                                       return new SimpleName (Basename, TypeArguments, Location);
                                else
-                                       return new SimpleName (Name, loc);
+                                       return new SimpleName (Name, Location);
                        }
+
+                       if (is_double_colon) {
+                               if (Left.Left != null)
+                                       throw new InternalErrorException ("The left side of a :: should be an identifier");
+                               return new QualifiedAliasMember (Left.Name, Name, Location);
+                       }
+
+                       Expression lexpr = Left.GetTypeExpression ();
+                       return new MemberAccess (lexpr, Name, TypeArguments, Location);
                }
 
                public MemberName Clone ()
                {
-                       if (Left != null)
-                               return new MemberName (Left.Clone (), Name, TypeArguments);
-                       else
-                               return new MemberName (Name, TypeArguments);
+                       MemberName left_clone = Left == null ? null : Left.Clone ();
+                       return new MemberName (left_clone, Name, is_double_colon, TypeArguments, Location);
                }
 
                public string Basename {
@@ -213,8 +245,9 @@ namespace Mono.CSharp {
 
                public override string ToString ()
                {
+                       string connect = is_double_colon ? "::" : ".";
                        if (Left != null)
-                               return Left.FullName + "." + FullName;
+                               return Left.FullName + connect + FullName;
                        else
                                return FullName;
                }
@@ -230,6 +263,8 @@ namespace Mono.CSharp {
                                return true;
                        if (other == null || Name != other.Name)
                                return false;
+                       if (is_double_colon != other.is_double_colon)
+                               return false;
 
                        if ((TypeArguments != null) &&
                            (other.TypeArguments == null || TypeArguments.Count != other.TypeArguments.Count))
@@ -249,6 +284,8 @@ namespace Mono.CSharp {
                        int hash = Name.GetHashCode ();
                        for (MemberName n = Left; n != null; n = n.Left)
                                hash ^= n.Name.GetHashCode ();
+                       if (is_double_colon)
+                               hash ^= 0xbadc01d;
 
                        if (TypeArguments != null)
                                hash ^= TypeArguments.Count << 5;
@@ -291,7 +328,9 @@ namespace Mono.CSharp {
                /// <summary>
                ///   Location where this declaration happens
                /// </summary>
-               public readonly Location Location;
+               public Location Location {
+                       get { return member_name.Location; }
+               }
 
                /// <summary>
                ///   XML documentation comment
@@ -326,8 +365,7 @@ namespace Mono.CSharp {
                /// </summary>
                internal Flags caching_flags;
 
-               public MemberCore (TypeContainer parent, MemberName name, Attributes attrs,
-                                  Location loc)
+               public MemberCore (TypeContainer parent, MemberName name, Attributes attrs)
                        : base (attrs)
                {
                        if (parent is PartialContainer && !(this is PartialContainer))
@@ -335,7 +373,6 @@ namespace Mono.CSharp {
 
                        Parent = parent;
                        member_name = name;
-                       Location = loc;
                        caching_flags = Flags.Obsolete_Undetected | Flags.ClsCompliance_Undetected | Flags.HasCompliantAttribute_Undetected | Flags.Excluded_Undetected;
                }
 
@@ -345,21 +382,6 @@ namespace Mono.CSharp {
                        cached_name = null;
                }
 
-               /// <summary>
-               /// Tests presence of ObsoleteAttribute and report proper error
-               /// </summary>
-               protected void CheckUsageOfObsoleteAttribute (Type type)
-               {
-                       if (type == null)
-                               return;
-
-                       ObsoleteAttribute obsolete_attr = AttributeTester.GetObsoleteAttribute (type);
-                       if (obsolete_attr == null)
-                               return;
-
-                       AttributeTester.Report_ObsoleteMessage (obsolete_attr, type.FullName, Location);
-               }
-
                public abstract bool Define ();
 
                // 
@@ -378,16 +400,19 @@ namespace Mono.CSharp {
                /// </summary>
                public virtual void Emit ()
                {
-                       // Hack with Parent == null is for EnumMember
-                       if (Parent == null || (GetObsoleteAttribute (Parent) == null && Parent.GetObsoleteAttribute (Parent) == null))
-                               VerifyObsoleteAttribute ();
-
                        if (!RootContext.VerifyClsCompliance)
                                return;
 
                        VerifyClsCompliance (Parent);
                }
 
+               public virtual EmitContext EmitContext
+               {
+                       get {
+                               return Parent.EmitContext;
+                       }
+               }
+
                public bool InUnsafe {
                        get {
                                return ((ModFlags & Modifiers.UNSAFE) != 0) || Parent.UnsafeContext;
@@ -426,7 +451,7 @@ namespace Mono.CSharp {
                /// <summary>
                /// Returns instance of ObsoleteAttribute for this MemberCore
                /// </summary>
-               public ObsoleteAttribute GetObsoleteAttribute (DeclSpace ds)
+               public virtual ObsoleteAttribute GetObsoleteAttribute ()
                {
                        // ((flags & (Flags.Obsolete_Undetected | Flags.Obsolete)) == 0) is slower, but why ?
                        if ((caching_flags & Flags.Obsolete_Undetected) == 0 && (caching_flags & Flags.Obsolete) == 0) {
@@ -439,11 +464,11 @@ namespace Mono.CSharp {
                                return null;
 
                        Attribute obsolete_attr = OptAttributes.Search (
-                               TypeManager.obsolete_attribute_type, ds.EmitContext);
+                               TypeManager.obsolete_attribute_type, EmitContext);
                        if (obsolete_attr == null)
                                return null;
 
-                       ObsoleteAttribute obsolete = obsolete_attr.GetObsoleteAttribute (ds.EmitContext);
+                       ObsoleteAttribute obsolete = obsolete_attr.GetObsoleteAttribute (EmitContext);
                        if (obsolete == null)
                                return null;
 
@@ -451,6 +476,34 @@ namespace Mono.CSharp {
                        return obsolete;
                }
 
+               /// <summary>
+               /// Checks for ObsoleteAttribute presence. It's used for testing of all non-types elements
+               /// </summary>
+               public virtual void CheckObsoleteness (Location loc)
+               {
+                       if (Parent != null)
+                               Parent.CheckObsoleteness (loc);
+
+                       ObsoleteAttribute oa = GetObsoleteAttribute ();
+                       if (oa == null) {
+                               return;
+                       }
+
+                       AttributeTester.Report_ObsoleteMessage (oa, GetSignatureForError (), loc);
+               }
+
+               protected void CheckObsoleteType (Expression type)
+               {
+                       ObsoleteAttribute obsolete_attr = AttributeTester.GetObsoleteAttribute (type.Type);
+                       if (obsolete_attr == null)
+                               return;
+
+                       if (GetObsoleteAttribute () != null || Parent.GetObsoleteAttribute () != null)
+                               return;
+
+                       AttributeTester.Report_ObsoleteMessage (obsolete_attr, TypeManager.CSharpName (type.Type), type.Location);
+               }
+
                /// <summary>
                /// Analyze whether CLS-Compliant verification must be execute for this MemberCore.
                /// </summary>
@@ -552,8 +605,6 @@ namespace Mono.CSharp {
                        return true;
                }
 
-               protected abstract void VerifyObsoleteAttribute ();
-
                //
                // Raised (and passed an XmlElement that contains the comment)
                // when GenerateDocComment is writing documentation expectedly.
@@ -625,8 +676,10 @@ namespace Mono.CSharp {
                // The emit context for toplevel objects.
                protected EmitContext ec;
                
-               public EmitContext EmitContext {
-                       get { return ec; }
+               public override EmitContext EmitContext {
+                       get {
+                               return ec;
+                       }
                }
 
                //
@@ -646,8 +699,8 @@ namespace Mono.CSharp {
                static string[] attribute_targets = new string [] { "type" };
 
                public DeclSpace (NamespaceEntry ns, TypeContainer parent, MemberName name,
-                                 Attributes attrs, Location l)
-                       : base (parent, name, attrs, l)
+                                 Attributes attrs)
+                       : base (parent, name, attrs)
                {
                        NamespaceEntry = ns;
                        Basename = name.Basename;
@@ -665,7 +718,7 @@ namespace Mono.CSharp {
                /// </summary>
                protected bool AddToContainer (MemberCore symbol, string name)
                {
-                       if (name == Basename && !(this is Interface) && !(this is Enum)) {
+                       if (name == MemberName.Name && !(this is Interface) && !(this is Enum)) {
                                if (symbol is TypeParameter)
                                        Report.Error (694, symbol.Location,
                                                      "Type parameter `{0}' has same name as " +
@@ -819,13 +872,9 @@ namespace Mono.CSharp {
                protected TypeExpr ResolveBaseTypeExpr (Expression e, bool silent, Location loc)
                {
                        TypeResolveEmitContext.loc = loc;
-                       TypeResolveEmitContext.ContainerType = TypeBuilder;
                        TypeResolveEmitContext.ResolvingTypeTree = true;
                        if (this is GenericMethod)
                                TypeResolveEmitContext.ContainerType = Parent.TypeBuilder;
-                       else
-                               TypeResolveEmitContext.ContainerType = TypeBuilder;
-
                        return e.ResolveAsTypeTerminal (TypeResolveEmitContext);
                }
                
@@ -1317,6 +1366,36 @@ namespace Mono.CSharp {
                public override string[] ValidAttributeTargets {
                        get { return attribute_targets; }
                }
+
+               protected override bool VerifyClsCompliance (DeclSpace ds)
+               {
+                       if (!base.VerifyClsCompliance (ds)) {
+                               return false;
+                       }
+
+                       IDictionary cache = TypeManager.AllClsTopLevelTypes;
+                       string lcase = Name.ToLower (System.Globalization.CultureInfo.InvariantCulture);
+                       if (!cache.Contains (lcase)) {
+                               cache.Add (lcase, this);
+                               return true;
+                       }
+
+                       object val = cache [lcase];
+                       if (val == null) {
+                               Type t = AttributeTester.GetImportedIgnoreCaseClsType (lcase);
+                               if (t == null)
+                                       return true;
+                               Report.SymbolRelatedToPreviousError (t);
+                       }
+                       else {
+                               if (val is PartialContainer)
+                                       return true;
+
+                               Report.SymbolRelatedToPreviousError ((DeclSpace)val);
+                       }
+                       Report.Warning (3005, Location, "Identifier `{0}' differing only in case is not CLS-compliant", GetSignatureForError ());
+                       return true;
+               }
        }
 
        /// <summary>
@@ -2030,7 +2109,7 @@ namespace Mono.CSharp {
                // Because the MemberCache holds members from this class and all the base classes,
                // we can avoid tons of reflection stuff.
                //
-               public MemberInfo FindMemberToOverride (Type invocationType, string name, Type [] paramTypes, bool is_property)
+               public MemberInfo FindMemberToOverride (Type invocationType, string name, Type [] paramTypes, GenericMethod genericMethod, bool is_property)
                {
                        ArrayList applicable;
                        if (method_hash != null && !is_property)
@@ -2106,7 +2185,20 @@ namespace Mono.CSharp {
                                        if (!TypeManager.IsEqual (paramTypes [j], cmpAttrs [j]))
                                                goto next;
                                }
-                               
+
+                               //
+                               // check generic arguments for methods
+                               //
+                               if (mi != null) {
+                                       Type [] cmpGenArgs = mi.GetGenericArguments ();
+                                       if (genericMethod != null && cmpGenArgs.Length > 0) {
+                                               if (genericMethod.TypeParameters.Length != cmpGenArgs.Length)
+                                                       goto next;
+                                       }
+                                       else if (! (genericMethod == null && cmpGenArgs.Length == 0))
+                                               goto next;
+                               }
+
                                //
                                // get one of the methods because this has the visibility info.
                                //