DataTableReadXmlSchemaTest.cs fixed #ifNet2.0 and notworking
[mono.git] / mcs / gmcs / cs-parser.jay
index 136217564c750c79c698e293283f6d75af8fbb22..807588e532597d94b4b928874de9a3464e7ec311 100644 (file)
@@ -33,9 +33,9 @@ namespace Mono.CSharp
        public class CSharpParser {
                NamespaceEntry  current_namespace;
                TypeContainer   current_container;
-               TypeContainer   current_class;
+               DeclSpace       current_class;
        
-               IIteratorContainer iterator_container;
+               IAnonymousHost anonymous_host;
 
                /// <summary>
                ///   Current block is used to add statements as we find
@@ -45,6 +45,9 @@ namespace Mono.CSharp
 
                Delegate   current_delegate;
 
+               GenericMethod current_generic_method;
+               AnonymousMethodExpression current_anonymous_method;
+
                /// <summary>
                ///   This is used by the unary_expression code to resolve
                ///   a name against a parameter.  
@@ -63,12 +66,15 @@ namespace Mono.CSharp
                ///   Hack to help create non-typed array initializer
                /// </summary>
                public static Expression current_array_type;
+               Expression pushed_current_array_type;
 
                /// <summary>
                ///   Used to determine if we are parsing the get/set pair
                ///   of an indexer or a property
                /// </summmary>
-               bool  parsing_indexer;
+               bool parsing_indexer;
+
+               bool parsing_anonymous_method;
 
                ///
                /// An out-of-band stack.
@@ -400,11 +406,15 @@ namespace_declaration
                        syntax_error (lexer.Location, "namespace name expected");
 
                current_namespace = new NamespaceEntry (
-                       current_namespace, file, name.GetName (), name.Location);
+                       current_namespace, file, name.GetName ());
+               current_class = current_namespace.SlaveDeclSpace;
+               current_container = current_class.PartialContainer;
          } 
          namespace_body opt_semicolon
          { 
                current_namespace = current_namespace.Parent;
+               current_class = current_namespace.SlaveDeclSpace;
+               current_container = current_class.PartialContainer;
          }
        ;
 
@@ -641,7 +651,7 @@ attribute
                                      "'<' unexpected: attributes cannot be generic");
                }
 
-               ArrayList arguments = (ArrayList) $2;
+               object [] arguments = (object []) $2;
                MemberName left = mname.Left;
                string identifier = mname.Name;
 
@@ -675,29 +685,18 @@ attribute_arguments
                if ($1 == null)
                        $$ = null;
                else {
-                       ArrayList args = new ArrayList (4);
-                       args.Add ($1);
-               
-                       $$ = args;
+                       $$ = new object [] { $1, null };
                }
          }
-        | positional_argument_list COMMA named_argument_list
+    | positional_argument_list COMMA named_argument_list
          {
-               ArrayList args = new ArrayList (4);
-               args.Add ($1);
-               args.Add ($3);
-
-               $$ = args;
+               $$ = new object[] { $1, $3 };
          }
-        | named_argument_list
+    | named_argument_list
          {
-               ArrayList args = new ArrayList (4);
-               args.Add (null);
-               args.Add ($1);
-               
-               $$ = args;
+               $$ = new object [] { null, $1 };
          }
-        ;
+    ;
 
 
 opt_positional_argument_list
@@ -794,22 +793,9 @@ struct_declaration
          member_name
          { 
                MemberName name = MakeName ((MemberName) $6);
-               if ($3 != null) {
-                       ClassPart part = PartialContainer.CreatePart (
-                               current_namespace, current_class, name, (int) $2,
-                               (Attributes) $1, Kind.Struct, (Location) $3);
-
-                       current_container = part.PartialContainer;
-                       current_class = part;
-               } else {
-                       current_class = new Struct (
-                               current_namespace, current_class, name, (int) $2,
-                               (Attributes) $1);
-
-                       current_container.AddClassOrStruct (current_class);
-                       current_container = current_class;
-                       RootContext.Tree.RecordDecl (current_namespace.NS, name, current_class);
-               }
+               push_current_class (new Struct (
+                       current_namespace, current_class, name, (int) $2,
+                       (Attributes) $1), false, $3);
          }
          opt_class_base
          opt_type_parameter_constraints_clauses
@@ -817,12 +803,12 @@ struct_declaration
                lexer.ConstraintsParsing = false;
 
                if ($8 != null)
-                       current_class.Bases = (ArrayList) $8;
+                       current_container.AddBasesForPart (current_class, (ArrayList) $8);
 
                current_class.SetParameterInfo ((ArrayList) $9);
 
                if (RootContext.Documentation != null)
-                       current_class.DocComment = Lexer.consume_doc_comment ();
+                       current_container.DocComment = Lexer.consume_doc_comment ();
          }
          struct_body
          {
@@ -945,6 +931,8 @@ field_declaration
                Expression type = (Expression) $3;
                int mod = (int) $2;
 
+               current_array_type = null;
+
                foreach (VariableDeclaration var in (ArrayList) $4){
                        Field field = new Field (current_class, type, mod, var.identifier, 
                                                 (Attributes) $1, var.Location);
@@ -969,6 +957,8 @@ field_declaration
                        Expression type = (Expression) $4;
                        int mod = (int) $2;
 
+                       current_array_type = null;
+
                        foreach (VariableDeclaration var in (ArrayList) $5) {
                                FixedField field = new FixedField (current_class, type, mod, var.identifier,
                                        (Expression)var.expression_or_array_initializer, (Attributes) $1, var.Location);
@@ -986,6 +976,7 @@ field_declaration
          VOID  
          variable_declarators
          SEMICOLON {
+               current_array_type = null;
                Report.Error (670, (Location) $3, "Fields cannot have void type");
          }
        ;
@@ -1063,6 +1054,10 @@ variable_initializer
          {
                $$ = new StackAlloc ((Expression) $2, (Expression) $4, (Location) $1);
          }
+       | ARGLIST
+         {
+               $$ = new ArglistAccess ((Location) $1);
+         }
        | STACKALLOC type
          {
                Report.Error (1575, (Location) $1, "A stackalloc expression requires [] after type");
@@ -1072,7 +1067,7 @@ variable_initializer
 
 method_declaration
        : method_header {
-               iterator_container = (IIteratorContainer) $1;
+               anonymous_host = (IAnonymousHost) $1;
                if (RootContext.Documentation != null)
                        Lexer.doc_state = XmlCommentState.NotAllowed;
          }
@@ -1082,8 +1077,9 @@ method_declaration
                method.Block = (ToplevelBlock) $3;
                current_container.AddMethod (method);
 
+               anonymous_host = null;
+               current_generic_method = null;
                current_local_parameters = null;
-               iterator_container = null;
 
                if (RootContext.Documentation != null)
                        Lexer.doc_state = XmlCommentState.Allowed;
@@ -1140,7 +1136,9 @@ method_header
                method = new Method (current_class, generic, (Expression) $3, (int) $2, false,
                                     name, (Parameters) $6, (Attributes) $1);
 
+               anonymous_host = method;
                current_local_parameters = (Parameters) $6;
+               current_generic_method = generic;
 
                if (RootContext.Documentation != null)
                        method.DocComment = Lexer.consume_doc_comment ();
@@ -1176,7 +1174,9 @@ method_header
                method = new Method (current_class, generic, TypeManager.system_void_expr,
                                     (int) $2, false, name, (Parameters) $6, (Attributes) $1);
 
+               anonymous_host = method;
                current_local_parameters = (Parameters) $6;
+               current_generic_method = generic;
 
                if (RootContext.Documentation != null)
                        method.DocComment = Lexer.consume_doc_comment ();
@@ -1244,17 +1244,28 @@ formal_parameter_list
 
                $$ = new Parameters (pars, true);
          }
-       | parameter_array COMMA fixed_parameters
+       | parameter_array COMMA error
          {
                if ($1 != null)
                        Report.Error (231, ((Parameter) $1).Location, "A params parameter must be the last parameter in a formal parameter list");
                $$ = null;
          }
-       | ARGLIST COMMA fixed_parameters
+       | fixed_parameters COMMA parameter_array COMMA error
+         {
+               if ($3 != null)
+                       Report.Error (231, ((Parameter) $3).Location, "A params parameter must be the last parameter in a formal parameter list");
+               $$ = null;
+         }
+       | ARGLIST COMMA error
          {
                Report.Error (257, (Location) $1, "An __arglist parameter must be the last parameter in a formal parameter list");
                $$ = null;
          }
+       | fixed_parameters COMMA ARGLIST COMMA error 
+         {
+               Report.Error (257, (Location) $3, "An __arglist parameter must be the last parameter in a formal parameter list");
+               $$ = null;
+         }
        | parameter_array 
          {
                $$ = new Parameters (new Parameter[] { (Parameter) $1 } );
@@ -1441,7 +1452,7 @@ get_accessor_declaration
                        current_local_parameters = indexer_parameters;
                lexer.PropertyParsing = false;
 
-               iterator_container = SimpleIteratorContainer.GetSimple ();
+               anonymous_host = SimpleAnonymousHost.GetSimple ();
          }
           accessor_body
          {
@@ -1454,10 +1465,8 @@ get_accessor_declaration
                current_local_parameters = null;
                lexer.PropertyParsing = true;
 
-               if (SimpleIteratorContainer.Simple.Yields)
-                       accessor.SetYields ();
-
-               iterator_container = null;
+               SimpleAnonymousHost.Simple.Propagate (accessor);
+               anonymous_host = null;
 
                if (RootContext.Documentation != null)
                        if (Lexer.doc_state == XmlCommentState.Error)
@@ -1496,7 +1505,7 @@ set_accessor_declaration
                
                lexer.PropertyParsing = false;
 
-               iterator_container = SimpleIteratorContainer.GetSimple ();
+               anonymous_host = SimpleAnonymousHost.GetSimple ();
          }
          accessor_body
          {
@@ -1509,10 +1518,8 @@ set_accessor_declaration
                current_local_parameters = null;
                lexer.PropertyParsing = true;
 
-               if (SimpleIteratorContainer.Simple.Yields)
-                       accessor.SetYields ();
-
-               iterator_container = null;
+               SimpleAnonymousHost.Simple.Propagate (accessor);
+               anonymous_host = null;
 
                if (RootContext.Documentation != null
                        && Lexer.doc_state == XmlCommentState.Error)
@@ -1539,22 +1546,9 @@ interface_declaration
          {
                MemberName name = MakeName ((MemberName) $6);
 
-               if ($3 != null) {
-                       ClassPart part = PartialContainer.CreatePart (
-                               current_namespace, current_class, name, (int) $2,
-                               (Attributes) $1, Kind.Interface, (Location) $3);
-
-                       current_container = part.PartialContainer;
-                       current_class = part;
-               } else {
-                       current_class = new Interface (
-                               current_namespace, current_class, name, (int) $2,
-                               (Attributes) $1);
-
-                       current_container.AddInterface (current_class);
-                       current_container = current_class;
-                       RootContext.Tree.RecordDecl (current_namespace.NS, name, current_class);
-               }
+               push_current_class (new Interface (
+                       current_namespace, current_class, name, (int) $2,
+                       (Attributes) $1), true, $3);
          }
          opt_class_base
          opt_type_parameter_constraints_clauses
@@ -1562,12 +1556,12 @@ interface_declaration
                lexer.ConstraintsParsing = false;
 
                if ($8 != null)
-                       current_class.Bases = (ArrayList) $8;
+                       current_container.AddBasesForPart (current_class, (ArrayList) $8);
 
                current_class.SetParameterInfo ((ArrayList) $9);
 
                if (RootContext.Documentation != null) {
-                       current_class.DocComment = Lexer.consume_doc_comment ();
+                       current_container.DocComment = Lexer.consume_doc_comment ();
                        Lexer.doc_state = XmlCommentState.Allowed;
                }
          }
@@ -1943,7 +1937,7 @@ interface_indexer_declaration
 operator_declaration
        : opt_attributes opt_modifiers operator_declarator 
          {
-               iterator_container = SimpleIteratorContainer.GetSimple ();
+               anonymous_host = SimpleAnonymousHost.GetSimple ();
          }
          operator_body
          {
@@ -1968,14 +1962,13 @@ operator_declaration
                        Lexer.doc_state = XmlCommentState.Allowed;
                }
 
-               if (SimpleIteratorContainer.Simple.Yields)
-                       op.SetYields ();
+               SimpleAnonymousHost.Simple.Propagate (op);
+               anonymous_host = null;
 
                // Note again, checking is done in semantic analysis
                current_container.AddOperator (op);
 
                current_local_parameters = null;
-               iterator_container = null;
          }
        ;
 
@@ -2164,11 +2157,6 @@ constructor_declaration
                                                "`{0}': static constructor cannot have an explicit `this' or `base' constructor call",
                                                c.GetSignatureForError ());
                                }
-       
-                               if (!c.Parameters.Empty){
-                                       Report.Error (132, c.Location,
-                                               "`{0}': The static constructor must be parameterless", c.GetSignatureForError ());
-                               }
                        } else {
                                c.ModFlags = Modifiers.Check (Constructor.AllowedModifiers, (int) $2, Modifiers.PRIVATE, c.Location);
                        }
@@ -2202,6 +2190,8 @@ constructor_declarator
                LocatedToken lt = (LocatedToken) $1;
                $$ = new Constructor (current_class, lt.Value, 0, (Parameters) $4,
                                      (ConstructorInitializer) $7, lt.Location);
+
+               anonymous_host = (IAnonymousHost) $$;
          }
        ;
 
@@ -2277,6 +2267,7 @@ event_declaration
          opt_modifiers
          EVENT type variable_declarators SEMICOLON
          {
+               current_array_type = null;
                foreach (VariableDeclaration var in (ArrayList) $5) {
 
                        MemberName name = new MemberName (var.identifier,
@@ -2439,7 +2430,7 @@ indexer_declaration
                parsing_indexer  = true;
                
                indexer_parameters = decl.param_list;
-               iterator_container = SimpleIteratorContainer.GetSimple ();
+               anonymous_host = SimpleAnonymousHost.GetSimple ();
          }
           accessor_declarations 
          {
@@ -2560,7 +2551,6 @@ enum_declaration
                }
 
                current_container.AddEnum (e);
-               RootContext.Tree.RecordDecl (current_namespace.NS, name, e);
                $$ = e;
 
          }
@@ -2655,8 +2645,14 @@ delegate_declaration
          OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
          {
                MemberName name = MakeName ((MemberName) $6);
+               Parameters p = (Parameters) $8;
+               if (p.HasArglist) {
+                       // TODO: wrong location
+                       Report.Error (1669, name.Location, "__arglist is not valid in this context");
+               }
+
                Delegate del = new Delegate (current_namespace, current_class, (Expression) $5,
-                                            (int) $2, name, (Parameters) $8, (Attributes) $1);
+                                            (int) $2, name, p, (Attributes) $1);
 
                if (RootContext.Documentation != null) {
                        del.DocComment = Lexer.consume_doc_comment ();
@@ -2664,8 +2660,6 @@ delegate_declaration
                }
 
                current_container.AddDelegate (del);
-               RootContext.Tree.RecordDecl (current_namespace.NS, name, del);
-
                current_delegate = del;
          }
          opt_type_parameter_constraints_clauses
@@ -2970,18 +2964,23 @@ parenthesized_expression_0
        : OPEN_PARENS expression CLOSE_PARENS
          {
                $$ = $2;
-               lexer.Deambiguate_CloseParens ();
+               lexer.Deambiguate_CloseParens ($$);
                // After this, the next token returned is one of
-               // CLOSE_PARENS_CAST, CLOSE_PARENS_NO_CAST, CLOSE_PARENS_OPEN_PARENS
+               // CLOSE_PARENS_CAST, CLOSE_PARENS_NO_CAST (CLOSE_PARENS), CLOSE_PARENS_OPEN_PARENS
                // or CLOSE_PARENS_MINUS.
          }
+       | OPEN_PARENS expression error { CheckToken (1026, yyToken, "Expecting ')'", lexer.Location); }
        ;
 
 parenthesized_expression
        : parenthesized_expression_0 CLOSE_PARENS_NO_CAST
          {
                $$ = $1;
-         }
+         }  
+       | parenthesized_expression_0 CLOSE_PARENS
+         {
+               $$ = $1;
+         }       
        | parenthesized_expression_0 CLOSE_PARENS_MINUS
          {
                // If a parenthesized expression is followed by a minus, we need to wrap
@@ -2989,20 +2988,19 @@ parenthesized_expression
                // in Binary.DoResolve().
                $$ = new ParenthesizedExpression ((Expression) $1);
          }
-       ;;
+       ;
 
 member_access
        : primary_expression DOT IDENTIFIER opt_type_argument_list
          {
                LocatedToken lt = (LocatedToken) $3;
-               $$ = new MemberAccess ((Expression) $1, lt.Value,
-                                      (TypeArguments) $4, lt.Location);
+               $$ = new MemberAccess ((Expression) $1, lt.Value, (TypeArguments) $4, lt.Location);
          }
        | predefined_type DOT IDENTIFIER opt_type_argument_list
          {
                LocatedToken lt = (LocatedToken) $3;
-               $$ = new MemberAccess ((Expression) $1, lt.Value,
-                                      (TypeArguments) $4, lt.Location);
+               // TODO: Location is wrong as some predefined types doesn't hold a location
+               $$ = new MemberAccess ((Expression) $1, lt.Value, (TypeArguments) $4, lt.Location);
          }
        ;
 
@@ -3011,15 +3009,12 @@ predefined_type
        ;
 
 invocation_expression
-       : primary_expression {
-               $$ = lexer.Location;
-         } OPEN_PARENS opt_argument_list CLOSE_PARENS
+       : primary_expression OPEN_PARENS opt_argument_list CLOSE_PARENS
          {
-               if ($1 == null) {
-                       Location l = (Location) $3;
-                       Report.Error (1, l, "Parse error");
-               }
-               $$ = new Invocation ((Expression) $1, (ArrayList) $4);
+               if ($1 == null)
+                       Report.Error (1, (Location) $2, "Parse error");
+               else
+                       $$ = new Invocation ((Expression) $1, (ArrayList) $3);
          }
        | parenthesized_expression_0 CLOSE_PARENS_OPEN_PARENS OPEN_PARENS CLOSE_PARENS
          {
@@ -3160,10 +3155,10 @@ this_access
        ;
 
 base_access
-       : BASE DOT IDENTIFIER
+       : BASE DOT IDENTIFIER opt_type_argument_list
          {
                LocatedToken lt = (LocatedToken) $3;
-               $$ = new BaseAccess (lt.Value, lt.Location);
+               $$ = new BaseAccess (lt.Value, (TypeArguments) $4, lt.Location);
          }
        | BASE OPEN_BRACKET expression_list CLOSE_BRACKET
          {
@@ -3336,34 +3331,21 @@ variable_initializer_list
          }
        ;
 
-void_pointer_expression
-       : void_pointer_expression STAR
-         {
-               $$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
-         }
-       | VOID STAR
-         {
-               $$ = new ComposedCast (TypeManager.system_void_expr, "*", lexer.Location);;
-         }
-       ;
-
 typeof_expression
-       : TYPEOF OPEN_PARENS VOID CLOSE_PARENS
-         {
-               $$ = new TypeOfVoid ((Location) $1);
-         }
-       | TYPEOF OPEN_PARENS void_pointer_expression CLOSE_PARENS
-         {
-               $$ = new TypeOf ((Expression) $3, (Location) $1);
-         }
-       | TYPEOF OPEN_PARENS
-         {
-               lexer.TypeOfParsing = true;
+       : TYPEOF
+      {
+               pushed_current_array_type = current_array_type;
+               lexer.TypeOfParsing = true;
          }
-         type CLOSE_PARENS
+         OPEN_PARENS type CLOSE_PARENS
          {
-               lexer.TypeOfParsing = false;
-               $$ = new TypeOf ((Expression) $4, lexer.Location);
+               lexer.TypeOfParsing = false;
+               Expression type = (Expression)$4;
+               if (type == TypeManager.system_void_expr)
+                       $$ = new TypeOfVoid ((Location) $1);
+               else
+                       $$ = new TypeOf (type, (Location) $1);
+               current_array_type = pushed_current_array_type;
          }
        ;
 
@@ -3394,26 +3376,37 @@ pointer_member_access
                LocatedToken lt = (LocatedToken) $3;
 
                deref = new Unary (Unary.Operator.Indirection, (Expression) $1, lt.Location);
-               $$ = new MemberAccess (deref, lt.Value, lt.Location);
+               $$ = new MemberAccess (deref, lt.Value);
          }
        ;
 
 anonymous_method_expression
        : DELEGATE opt_anonymous_method_signature
          {
+               if (oob_stack == null)
+                       oob_stack = new Stack (6);
+
+               oob_stack.Push (current_anonymous_method);
                oob_stack.Push (current_local_parameters);
                current_local_parameters = (Parameters)$2;
 
                // Force the next block to be created as a ToplevelBlock
                oob_stack.Push (current_block);
                oob_stack.Push (top_current_block);
-               current_block = null;
-         } 
+
+               Location loc = (Location) $1;
+               current_anonymous_method = new AnonymousMethodExpression (
+                       current_anonymous_method, current_generic_method, current_container,
+                       (Parameters) $2, (ToplevelBlock) top_current_block, loc);
+
+               parsing_anonymous_method = true;
+         }
          block
          {
                Location loc = (Location) $1;
                top_current_block = (Block) oob_stack.Pop ();
                current_block = (Block) oob_stack.Pop ();
+
                if (RootContext.Version == LanguageVersion.ISO_1){
                        Report.FeatureIsNotStandardized (loc, "anonymous methods");
                        $$ = null;
@@ -3421,11 +3414,17 @@ anonymous_method_expression
                        ToplevelBlock anon_block = (ToplevelBlock) $4;
 
                        anon_block.Parent = current_block;
-                       $$ = new AnonymousMethod ((Parameters) $2, (ToplevelBlock) top_current_block, 
-                               anon_block, loc);
-               }
-                       current_local_parameters = (Parameters) oob_stack.Pop ();
+
+                       current_anonymous_method.Block = anon_block;
+                       if ((anonymous_host != null) && (current_anonymous_method.Parent == null))
+                               anonymous_host.AddAnonymousMethod (current_anonymous_method);
+
+                       $$ = current_anonymous_method;
                }
+
+               current_local_parameters = (Parameters) oob_stack.Pop ();
+               current_anonymous_method = (AnonymousMethodExpression) oob_stack.Pop ();
+       }
        ;
 
 opt_anonymous_method_signature
@@ -3503,6 +3502,10 @@ cast_list
          {
                $$ = new Cast ((Expression) $1, (Expression) $3);
          }
+       | parenthesized_expression_0 CLOSE_PARENS_NO_CAST default_value_expression
+         {
+               $$ = new Cast ((Expression) $1, (Expression) $3);
+         }
        | parenthesized_expression_0 CLOSE_PARENS_OPEN_PARENS cast_expression
          {
                $$ = new Cast ((Expression) $1, (Expression) $3);
@@ -3838,28 +3841,9 @@ class_declaration
                MemberName name = MakeName ((MemberName) $6);
                int mod_flags = (int) $2;
 
-               if ($3 != null) {
-                       ClassPart part = PartialContainer.CreatePart (
-                               current_namespace, current_class, name, mod_flags,
-                               (Attributes) $1, Kind.Class, (Location) $3);
-
-                       current_container = part.PartialContainer;
-                       current_class = part;
-               } else {
-                       if ((mod_flags & Modifiers.STATIC) != 0) {
-                               current_class = new StaticClass (
-                                       current_namespace, current_class, name,
-                                       mod_flags, (Attributes) $1);
-                       } else {
-                               current_class = new Class (
-                                       current_namespace, current_class, name,
-                                       mod_flags, (Attributes) $1);
-                       }
-
-                       current_container.AddClassOrStruct (current_class);
-                       current_container = current_class;
-                       RootContext.Tree.RecordDecl (current_namespace.NS, name, current_class);
-               }
+               push_current_class (new Class (
+                       current_namespace, current_class, name,
+                       mod_flags, (Attributes) $1), false, $3);
          }
          opt_class_base
          opt_type_parameter_constraints_clauses
@@ -3872,13 +3856,13 @@ class_declaration
                                              "The class System.Object cannot have a base " +
                                              "class or implement an interface.");
                        }
-                       current_class.Bases = (ArrayList) $8;
+                       current_container.AddBasesForPart (current_class, (ArrayList) $8);
                }
 
                current_class.SetParameterInfo ((ArrayList) $9);
 
                if (RootContext.Documentation != null) {
-                       current_class.DocComment = Lexer.consume_doc_comment ();
+                       current_container.DocComment = Lexer.consume_doc_comment ();
                        Lexer.doc_state = XmlCommentState.Allowed;
                }
          }
@@ -3960,8 +3944,16 @@ type_parameter_constraints_clauses
          }
        | type_parameter_constraints_clauses type_parameter_constraints_clause {
                ArrayList constraints = (ArrayList) $1;
+               Constraints new_constraint = (Constraints)$2;
+
+               foreach (Constraints c in constraints) {
+                       if (new_constraint.TypeParameter == c.TypeParameter) {
+                               Report.Error (409, new_constraint.Location, "A constraint clause has already been specified for type parameter `{0}'",
+                                       new_constraint.TypeParameter);
+                       }
+               }
 
-               constraints.Add ($2);
+               constraints.Add (new_constraint);
                $$ = constraints;
          }
        ; 
@@ -4016,8 +4008,18 @@ type_parameter_constraint
 block
        : OPEN_BRACE 
          {
-               if (current_block == null){
-                       current_block = new ToplevelBlock ((ToplevelBlock) top_current_block, current_local_parameters, (Location) $1);
+               if (parsing_anonymous_method) {
+                       top_current_block = new ToplevelBlock (
+                               current_block, current_local_parameters, current_generic_method,
+                               (Location) $1);
+                       if (current_block != null)
+                               current_block.AddAnonymousChild ((ToplevelBlock) top_current_block);
+                       current_block = top_current_block;
+                       parsing_anonymous_method = false;
+               } else if (current_block == null) {
+                       current_block = new ToplevelBlock (
+                               (ToplevelBlock) top_current_block, current_local_parameters,
+                               current_generic_method, (Location) $1);
                        top_current_block = current_block;
                } else {
                        current_block = new Block (current_block, (Location) $1, Location.Null);
@@ -4103,7 +4105,7 @@ labeled_statement
                LocatedToken lt = (LocatedToken) $1;
                LabeledStatement labeled = new LabeledStatement (lt.Value, lt.Location);
 
-               if (current_block.AddLabel (lt.Value, labeled, lt.Location))
+               if (current_block.AddLabel (labeled))
                        current_block.AddStatement (labeled);
          }
          statement
@@ -4112,6 +4114,7 @@ labeled_statement
 declaration_statement
        : local_variable_declaration SEMICOLON
          {
+               current_array_type = null;
                if ($1 != null){
                        DictionaryEntry de = (DictionaryEntry) $1;
                        Expression e = (Expression) de.Key;
@@ -4122,6 +4125,7 @@ declaration_statement
 
        | local_constant_declaration SEMICOLON
          {
+               current_array_type = null;
                if ($1 != null){
                        DictionaryEntry de = (DictionaryEntry) $1;
 
@@ -4240,10 +4244,7 @@ local_constant_declaration
        ;
 
 expression_statement
-       : statement_expression SEMICOLON
-         {
-               $$ = $1;
-         }
+       : statement_expression SEMICOLON { $$ = $1; }
        ;
 
        //
@@ -4251,14 +4252,18 @@ expression_statement
        // because statement_expression is used for example in for_statement
        //
 statement_expression
-       : invocation_expression         { $$ = new StatementExpression ((ExpressionStatement) $1); }
-       | object_creation_expression    { $$ = new StatementExpression ((ExpressionStatement) $1); }
-       | assignment_expression         { $$ = new StatementExpression ((ExpressionStatement) $1); }
-       | post_increment_expression     { $$ = new StatementExpression ((ExpressionStatement) $1); }
-       | post_decrement_expression     { $$ = new StatementExpression ((ExpressionStatement) $1); }
-       | pre_increment_expression      { $$ = new StatementExpression ((ExpressionStatement) $1); }
-       | pre_decrement_expression      { $$ = new StatementExpression ((ExpressionStatement) $1); }
-       | error {
+       : expression
+         {
+               Expression expr = (Expression) $1;
+               ExpressionStatement s = expr as ExpressionStatement;
+               if (s == null) {
+                       Report.Error (201, expr.Location, "Only assignment, call, increment, decrement, and new object expressions can be used as a statement");
+                       $$ = null;
+               }
+               $$ = new StatementExpression (s);
+         }
+       | error
+         {
                Report.Error (1002, GetLocation ($1), "Expecting `;'");
                $$ = null;
          }
@@ -4305,6 +4310,8 @@ if_statement
 switch_statement
        : SWITCH OPEN_PARENS
          { 
+               if (switch_stack == null)
+                       switch_stack = new Stack (2);
                switch_stack.Push (current_block);
          }
          expression CLOSE_PARENS 
@@ -4327,7 +4334,8 @@ switch_block
 opt_switch_sections
        : /* empty */           
           {
-               Report.Error (1522, lexer.Location, "Empty switch block"); 
+               Report.Warning (1522, 1, lexer.Location, "Empty switch block"); 
+               $$ = new ArrayList ();
          }
        | switch_sections
        ;
@@ -4628,11 +4636,11 @@ yield_statement
                        Report.FeatureIsNotStandardized (lt.Location, "yield statement");
                        $$ = null;
                }
-               if (iterator_container == null){
+               if (anonymous_host == null){
                        Report.Error (204, lt.Location, "yield statement can only be used within a method, operator or property");
                        $$ = null;
                } else {
-                       iterator_container.SetYields ();
+                       anonymous_host.SetYields ();
                        $$ = new Yield ((Expression) $3, lt.Location); 
                }
          }
@@ -4653,11 +4661,11 @@ yield_statement
                        Report.FeatureIsNotStandardized (lt.Location, "yield statement");
                        $$ = null;
                }
-               if (iterator_container == null){
+               if (anonymous_host == null){
                        Report.Error (204, lt.Location, "yield statement can only be used within a method, operator or property");
                        $$ = null;
                } else {
-                       iterator_container.SetYields ();
+                       anonymous_host.SetYields ();
                        $$ = new YieldBreak (lt.Location);
                }
          }
@@ -4764,6 +4772,7 @@ catch_clause
          } block {
                Expression type = null;
                string id = null;
+               Block var_block = null;
 
                if ($2 != null){
                        DictionaryEntry cc = (DictionaryEntry) $2;
@@ -4774,11 +4783,12 @@ catch_clause
                                id = lt.Value;
                                while (current_block.Implicit)
                                        current_block = current_block.Parent;
+                               var_block = current_block;
                                current_block = current_block.Parent;
                        }
                }
 
-               $$ = new Catch (type, id, (Block) $4, ((Block) $4).loc);
+               $$ = new Catch (type, id, (Block) $4, var_block, ((Block) $4).loc);
          }
         ;
 
@@ -4987,7 +4997,6 @@ public class VariableDeclaration {
                } else {
                        this.expression_or_array_initializer = (Expression)eoai;
                }
-               CSharpParser.current_array_type = null;
                this.Location = lt.Location;
                this.OptAttributes = opt_attrs;
        }
@@ -5017,22 +5026,41 @@ public class IndexerDeclaration {
 }
 
 //
-// We use this when we do not have an object in advance that is an IIteratorContainer
+// We use this when we do not have an object in advance that is an IAnonymousHost
 //
-public class SimpleIteratorContainer : IIteratorContainer {
-       public bool Yields;
+public class SimpleAnonymousHost : IAnonymousHost {
+       public static readonly SimpleAnonymousHost Simple = new SimpleAnonymousHost ();
 
-       public static SimpleIteratorContainer Simple = new SimpleIteratorContainer ();
+       bool yields;
+       ArrayList anonymous_methods;
 
-       //
-       // Reset and return
-       //
-       public static SimpleIteratorContainer GetSimple () { 
-               Simple.Yields = false;
+       public static SimpleAnonymousHost GetSimple () {
+               Simple.yields = false;
+               Simple.anonymous_methods = null;
                return Simple;
        }
 
-       public void SetYields () { Yields = true; } 
+       public void SetYields ()
+       {
+               yields = true;
+       }
+
+       public void AddAnonymousMethod (AnonymousMethodExpression anonymous)
+       {
+               if (anonymous_methods == null)
+                       anonymous_methods = new ArrayList ();
+               anonymous_methods.Add (anonymous);
+       }
+
+       public void Propagate (IAnonymousHost real_host)
+       {
+               if (yields)
+                       real_host.SetYields ();
+               if (anonymous_methods != null) {
+                       foreach (AnonymousMethodExpression ame in anonymous_methods)
+                               real_host.AddAnonymousMethod (ame);
+               }
+       }
 }
 
 // <summary>
@@ -5068,19 +5096,21 @@ void Error_ExpectingTypeName (Expression expr)
        }
 }
 
-TypeContainer pop_current_class ()
+void push_current_class (TypeContainer tc, bool is_interface, object partial_token)
 {
-       TypeContainer retval = current_class;
+       if (partial_token != null)
+               current_container = current_container.AddPartial (tc, is_interface);
+       else
+               current_container = current_container.AddTypeContainer (tc, is_interface);
+       current_class = tc;
+}
+
+DeclSpace pop_current_class ()
+{
+       DeclSpace retval = current_class;
 
        current_class = current_class.Parent;
-       current_container = current_container.Parent;
-       
-       if (current_class != current_container) {
-               if (!(current_class is ClassPart) ||
-                   ((ClassPart) current_class).PartialContainer != current_container)
-                       throw new InternalErrorException ();
-       } else if (current_container is ClassPart)
-               current_container = ((ClassPart) current_class).PartialContainer;
+       current_container = current_class.PartialContainer;
 
        return retval;
 }
@@ -5094,8 +5124,8 @@ MakeName (MemberName class_name)
 {
        Namespace ns = current_namespace.NS;
 
-       if (current_container.Name == ""){
-               if (ns.Name != "")
+       if (current_container.Name.Length == 0){
+               if (ns.Name.Length != 0)
                        return new MemberName (ns.MemberName, class_name);
                else
                        return class_name;
@@ -5259,21 +5289,18 @@ public Tokenizer Lexer {
 
 public CSharpParser (SeekableStreamReader reader, SourceFile file, ArrayList defines)
 {
-       current_namespace = new NamespaceEntry (null, file, null, Location.Null);
        this.name = file.Name;
        this.file = file;
-       current_container = RootContext.Tree.Types;
-       // TODO: Make RootContext.Tree.Types a PartialContainer.
-       current_class = current_container;
-       current_container.NamespaceEntry = current_namespace;
-       oob_stack = new Stack ();
-       switch_stack = new Stack ();
+       current_namespace = new NamespaceEntry (null, file, null);
+       current_class = current_namespace.SlaveDeclSpace;
+       current_container = current_class.PartialContainer; // == RootContest.ToplevelTypes
 
        lexer = new Tokenizer (reader, file, defines);
 }
 
 public void parse ()
 {
+       int errors = Report.Errors;
        try {
                if (yacc_verbose_flag > 1)
                        yyparse (lexer, new yydebug.yyDebugSimple ());
@@ -5286,21 +5313,22 @@ public void parse ()
                // Removed for production use, use parser verbose to get the output.
                //
                // Console.WriteLine (e);
-               Report.Error (-25, lexer.Location, "Parsing error");
+               if (Report.Errors == errors)
+                       Report.Error (-25, lexer.Location, "Parsing error");
                if (yacc_verbose_flag > 0)
                        Console.WriteLine (e);
        }
 
-       RootContext.Tree.Types.NamespaceEntry = null;
+       if (RootContext.ToplevelTypes.NamespaceEntry != null)
+               throw new InternalErrorException ("who set it?");
 }
 
-void CheckToken (int error, int yyToken, string msg, Location loc)
+static void CheckToken (int error, int yyToken, string msg, Location loc)
 {
-       if (yyToken >= Token.FIRST_KEYWORD && yyToken <= Token.LAST_KEYWORD){
-               Report.Error (error, loc, String.Format ("{0}: `{1}' is a keyword", msg, yyNames [yyToken].ToLower ()));
-               return;
-       }               
-       Report.Error (error, loc, msg);
+       if (yyToken >= Token.FIRST_KEYWORD && yyToken <= Token.LAST_KEYWORD)
+               Report.Error (error, loc, "{0}: `{1}' is a keyword", msg, yyNames [yyToken].ToLower ());
+       else
+               Report.Error (error, loc, msg);
 }
 
 void CheckIdentifierToken (int yyToken, Location loc)