2005-01-19 Sureshkumar T <tsureshkumar@novell.com>
[mono.git] / mcs / mbas / mb-parser.jay
index 4555a83e0a0067b897532ef47f631b9a12be01fd..8802a2ffaac970798616263e2c049a7fe4e14e9e 100644 (file)
@@ -3,8 +3,8 @@
 // Mono.MonoBASIC.Parser.cs (from .jay): The Parser for the MonoBASIC compiler
 //
 // Authors: A Rafael D Teixeira (rafaelteixeirabr@hotmail.com)
-//                 Anirban Bhattacharjee (banirban@novell.com)
-//          Jambunathan (kjambunathan@novell.com)
+//         Anirban Bhattacharjee (banirban@novell.com)
+//          Jambunathan (kjambunathan@novell.com)
 //
 // Licensed under the terms of the GNU GPL
 //
@@ -42,6 +42,7 @@ namespace Mono.MonoBASIC
        {
        
 
+
                /// <summary>
                ///   Current block is used to add statements as we find
                ///   them.  
@@ -627,14 +628,21 @@ compilation_unit
        : logical_end_of_line
          opt_option_directives
          opt_imports_directives 
-         opt_global_attributes
-         opt_declarations 
+         declarations 
          EOF
          {
                $$=$4;
          }
+       |logical_end_of_line
+         opt_option_directives
+         opt_imports_directives 
+         opt_attributes
+         EOF
+         {
+               /* ????? */ ;
+         }
        ;
-         
+         
 opt_option_directives
        : /* empty */
        | option_directives
@@ -744,11 +752,17 @@ declaration
                } else
                        break;
 
-               if ((mod_flags & (Modifiers.PRIVATE|Modifiers.PROTECTED)) != 0){
+               if ((mod_flags & (Modifiers.PRIVATE)) != 0){
                        Report.Error (
-                               1527, lexer.Location, 
+                               31089, lexer.Location, 
                                "Namespace elements cannot be explicitly " +
-                               "declared private or protected in '" + name + "'");
+                               "declared private in '" + name + "'");
+                       }
+               else if ((mod_flags & (Modifiers.PROTECTED)) != 0){
+                       Report.Error (
+                               31047, lexer.Location, 
+                               "Namespace elements cannot be explicitly " +
+                               "declared protected in '" + name + "'");
                }
          }
        ;
@@ -821,84 +835,6 @@ opt_params
        | OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS    { $$ = $2; }
        ;
 
-opt_global_attributes
-       : /* empty */
-       | global_attribute_sections     
-       ;
-       
-global_attribute_sections
-       : global_attribute_section      
-         { 
-               $$ = null;
-               if ($1 != null) {
-                       CodeGen.AddGlobalAttributes ((ArrayList) $1);
-               }
-         }
-       | global_attribute_sections global_attribute_section    
-         {
-               $$ = null;
-               if ($2 != null) {
-                       CodeGen.AddGlobalAttributes ((ArrayList) $2);
-               }       
-         }
-       ;
-
-global_attribute_section
-       : OP_LT global_attribute_list OP_GT end_of_stmt
-         {
-               $$ = $2;
-         }
-       ; 
-
-global_attribute_list
-       : global_attribute 
-         {
-               ArrayList attrs = null;
-               if ($1 != null) {
-                       attrs = new ArrayList ();
-                       attrs.Add ($1);
-               }
-               $$ = attrs;
-         }     
-       | global_attribute_list COMMA global_attribute
-         {
-               ArrayList attrs = null;
-               if ($3 != null) {
-                       attrs = ($1 == null) ? new ArrayList () : (ArrayList) $1;
-                       attrs.Add ($3);
-               }
-               $$ = attrs;
-         }     
-       ;
-
-global_attribute 
-       : global_attribute_target_specifier 
-         {
-               $$ = lexer.Location;
-         }
-         COLON 
-         namespace_or_type_name
-         {
-               $$ = lexer.Location;
-         }
-         opt_attribute_arguments
-         {
-               $$ = null;
-               string attribute_target = (string) $1;
-               if (attribute_target != "assembly" && attribute_target != "module") {
-                       Report.Error (29999, lexer.Location, "`" + (string)$1 + "' is an invalid attribute modifier");
-                       break;
-               }
-               $$ = new Attribute (attribute_target, (string) $4, (ArrayList) $6, (Location)$5 );
-      }        
-       ;
-
-global_attribute_target_specifier
-       : ASSEMBLY      { $$ = "assembly"; }
-       | MODULE        { $$ = "module"; }
-       | namespace_or_type_name
-       ;
-
 opt_attributes
        : /* empty */
        | attribute_sections    
@@ -912,9 +848,26 @@ attribute_sections
        :  attribute_section    
          { 
                $$ = $1;
-               if ($1 != null) {
+               if ($1 == null) {
+                       expecting_local_attribs = false;
+                       expecting_global_attribs = false;
+                       break;
+               }
+               
+               if (expecting_local_attribs) {
+                       local_attrib_section_added = true;
+                       allow_global_attribs = false;
+
                        $$ = new Attributes ((ArrayList) $1);
                }       
+
+               if (expecting_global_attribs) {
+                       $$ = null;
+                       CodeGen.AddGlobalAttributes ((ArrayList) $1);
+               }
+
+               expecting_local_attribs = false;
+               expecting_global_attribs = false;
          }
        | attribute_sections  
           {
@@ -926,19 +879,51 @@ attribute_sections
                if ($3 != null) {
                        ArrayList attrs = (ArrayList) $3;
 
-                       if ($1 == null)
-                               $$ = new Attributes (attrs);
-                       else 
-                               ((Attributes) $1).Add (attrs);
+                       if (expecting_local_attribs) {
+                               if (local_attrib_section_added) {
+                                       expecting_local_attribs = false;
+                                       expecting_global_attribs = false;
+                                       Report.Error (30205, (Location) $2, "Multiple attribute sections may not be used; Coalesce multiple attribute sections in to a single attribute section");
+                                       break;
+                               }
+
+                               if ($1 == null)
+                                       $$ = new Attributes (attrs);
+                               else 
+                                       ((Attributes) $1).Add (attrs);
+
+                               local_attrib_section_added = true;
+                               allow_global_attribs = false;
+                       }
+
+                       if (expecting_global_attribs) {
+                               $$ = null;
+                               CodeGen.AddGlobalAttributes ((ArrayList) $3);
+                       }
                }       
+
+               expecting_local_attribs = false;
+               expecting_global_attribs = false;
          }
        ;
 
 attribute_section
-       : OP_LT attribute_list OP_GT
+       : OP_LT attribute_list OP_GT opt_end_of_stmt
          {
                $$ = null;
                if ($2 != null) {
+                       if (expecting_global_attribs && !(bool) $4) {
+                               Report.Error (30205, lexer.Location, "End of statement expected");
+                               break;
+                       }
+                       
+                       if (expecting_local_attribs)  {
+                               if ((bool) $4) {
+                                       Report.Error (32035, lexer.Location, "Use a line continuation after the attribute specifier to apply it to the following statement.");
+                                       break;
+                               }
+                       }
+
                        $$ = $2;
                }
          }
@@ -979,9 +964,54 @@ attribute
           }
           opt_attribute_arguments
           {
-               $$ = new Attribute ((string) $1, (ArrayList) $3, (Location) $2);
+               $$ = null;
+               
+               if (expecting_global_attribs)
+                       Report.Error (32015, (Location) $2, "Expecting Assembly or Module attribute specifiers");
+               else {
+                       expecting_local_attribs = true;
+                       $$ = new Attribute ((string) $1, (ArrayList) $3, (Location) $2);
+               }
           }
+         | attribute_target_specifier 
+           {
+               $$ = lexer.Location;
+           }
+           COLON 
+           namespace_or_type_name
+          {
+                 $$ = lexer.Location;
+          }
+          opt_attribute_arguments
+          {
+               $$ = null;
+
+               string attribute_target = (string) $1;
+               if (attribute_target != "assembly" && attribute_target != "module") {
+                       Report.Error (29999, lexer.Location, "`" + (string)$1 + "' is an invalid attribute modifier");
+                       break;
+               }
+               if (!allow_global_attribs) {
+                       Report.Error (30637, (Location) $2, "Global attribute statements must precede any declarations in a file");
+                       break;
+               }
+
+               if (expecting_local_attribs) {
+                       Report.Error (30183, (Location) $2, "Global attributes cannot be combined with local attributes");
+                       break;
+               }                       
+
+               expecting_global_attribs = true;
+               $$ = new Attribute (attribute_target, (string) $4, (ArrayList) $6, (Location) $5);
+           }   
        ;
+
+attribute_target_specifier
+       :  ASSEMBLY     { $$ = "assembly"; }
+       | MODULE        { $$ = "module"; }
+       | namespace_or_type_name
+       ;
+       
                        
 opt_attribute_arguments
        : /* empty */   { $$ = null; }
@@ -1096,7 +1126,7 @@ type_spec_declaration
        ;
 
 class_declaration
-       : CLASS identifier logical_end_of_line opt_inherits opt_implements
+       : CLASS identifier end_of_stmt opt_inherits opt_implements
          {
                // Module members are static by default, but Class *can't* be declared static
                // so we must fix it, if mbas was the one actually responsible for this
@@ -1140,12 +1170,12 @@ class_declaration
 
 opt_inherits
        : /* empty */                           { $$ = null; }
-       | INHERITS type_list logical_end_of_line        { $$ = $2; }
+       | INHERITS type_list end_of_stmt        { $$ = $2; }
        ;
 
 opt_implements
        : /* empty */                           { $$ = null; }
-       | IMPLEMENTS type_list logical_end_of_line      { $$ = $2; }
+       | IMPLEMENTS type_list end_of_stmt              { $$ = $2; }
        ;
 
 opt_modifiers
@@ -1257,7 +1287,7 @@ module_member_declarator
        ;
        
 constant_declaration
-       : CONST constant_declarators logical_end_of_line
+       : CONST constant_declarators end_of_stmt
        {
                // Module members are static by default, but constants *can't* be declared static
                // so we must fix it, if mbas was the one actually responsible for this
@@ -1441,7 +1471,6 @@ sub_declaration
                                                evt_target + " is not declared with WithEvents");
                        }
                  } else if (handles_exp is BaseAccess) {
-                               string evt_id = ((BaseAccess) $4).member;
                                Statement addhnd = (Statement) new AddHandler ((Expression) $4, 
                                                                                        DecomposeQI((string) $2, loc), 
                                                                                        loc);   
@@ -1486,7 +1515,7 @@ func_declaration
        ;               
 
 struct_declaration
-       : STRUCTURE identifier logical_end_of_line
+       : STRUCTURE identifier end_of_stmt
          opt_implement_clause
          {
                Struct new_struct;
@@ -1560,7 +1589,7 @@ event_declaration
                VariableDeclaration var = new VariableDeclaration ((string) $2, (Expression) $4, lexer.Location);
 
                Event e = new Event ((Expression) $4, var.identifier, 
-                                    null, current_modifiers, null, null, 
+                                    null, current_modifiers, 
                                     current_attributes, (ArrayList) $5,
                                     lexer.Location);
 
@@ -1597,7 +1626,7 @@ event_declaration
                
                Event e = new Event (DecomposeQI (delName, lexer.Location),
                                         (string) $2, 
-                                    null, current_modifiers, null, null, 
+                                    null, current_modifiers, 
                                     current_attributes, (ArrayList) $4, 
                                     lexer.Location);
 
@@ -1843,7 +1872,7 @@ interface_event_declaration
                VariableDeclaration var = new VariableDeclaration ((string) $2, (Expression) $4, lexer.Location);
 
                Event e = new Event ((Expression) $4, var.identifier, 
-                                    null, current_modifiers, null, null, 
+                                    null, current_modifiers, 
                                     current_attributes, lexer.Location);
 
                CheckDef (current_interface.AddEvent (e), e.Name, e.Location);
@@ -1864,7 +1893,7 @@ interface_event_declaration
          
                Event e = new Event (DecomposeQI (delName, lexer.Location),
                                         (string) $2, 
-                                    null, current_modifiers, null, null, 
+                                    null, current_modifiers, 
                                     current_attributes, lexer.Location);
 
                CheckDef (current_interface.AddEvent (e), e.Name, e.Location);
@@ -1936,6 +1965,17 @@ abstract_propery_declaration
  non_abstract_propery_declaration
          : PROPERTY identifier opt_type_character opt_property_parameters opt_type_with_ranks opt_implement_clause logical_end_of_line
          {
+               if ((current_modifiers & Modifiers.DEFAULT) > 0) {
+                       if (current_container.DefaultPropName != null 
+                                 && current_container.DefaultPropName != (string) $2)
+                               Report.Error (30359, 
+                                               lexer.Location,
+                                               "Type '" + current_container.Name +
+                                               "' cannot have more than one 'Default Property' ");
+                                               
+                       current_container.DefaultPropName = (string) $2;
+               }               
+         
                get_implicit_value_parameter_type  = 
                        ($5 == null) ? (($3 == null) ? 
                                TypeManager.system_object_expr : (Expression) $3 ) : (Expression) $5;
@@ -2140,7 +2180,7 @@ opt_set_parameter
                        
 field_declaration
        : opt_dim_stmt 
-         variable_declarators logical_end_of_line
+         variable_declarators end_of_stmt
          {               
                int mod = (int) current_modifiers;
 
@@ -2443,8 +2483,6 @@ statement
            }
          | embedded_statement
            {
-                 Statement s = (Statement) $1;
-
                  current_block.AddStatement ((Statement) $1);
            } 
          | labeled_statement 
@@ -2464,8 +2502,6 @@ statement
          /* | empty_statement */
          | with_statement 
            {
-                 Statement s = (Statement) $1;
-
              current_block.AddStatement ((Statement) $1);
            }     
          ;     
@@ -3111,8 +3147,6 @@ if_statement
 pre_embedded_statement
        : embedded_statement 
          {
-               Statement s = (Statement) $1;
-
                current_block.AddStatement ((Statement) $1);
          } 
        ;       
@@ -3136,7 +3170,6 @@ else_pre_embedded_statement
         tmp_blocks.Push(bl); 
         
                start_block();
-               Statement s = (Statement) $2;
                current_block.AddStatement ((Statement) $2);
          } 
        ;       
@@ -3507,7 +3540,6 @@ constant_declarator
                string varname = (string) vname.Name;
                current_rank_specifiers = (ArrayList) vname.Rank;
                object varinit = $3;
-               ArrayList a_dims = null;
 
                if (varinit == null)
                        Report.Error (
@@ -4336,9 +4368,9 @@ assignment_expression
          }
        | prefixed_unary_expression OP_EXP ASSIGN expression
          {
-               Location l = lexer.Location;
+               /*Location l = lexer.Location;
 
-               /* TODO: $$ = new CompoundAssign (
+                TODO: $$ = new CompoundAssign (
                        Binary.Operator.ExclusiveOr, (Expression) $1, (Expression) $4, l); */
          }
        | prefixed_unary_expression ASSIGN ADDRESSOF expression
@@ -4443,8 +4475,6 @@ pp_directive
          {
                if(tokenizerController.IsAcceptingTokens) 
                {
-                       string id = ($2 as string);
-               
                        if(!($2 as string).ToLower().Equals("region"))
                                Report.Error (30205, lexer.Location, "Invalid Pre-processor directive");
                        else
@@ -4873,7 +4903,6 @@ public class VariableDeclaration {
                
        public static void FixupArrayTypes (ArrayList vars)
        {
-               int varcount =  vars.Count;
                string dims;
                
                foreach (VariableDeclaration var in vars) {
@@ -4965,13 +4994,11 @@ void CheckAttributeTarget (string a)
 
 private void AddHandler (Block b, Expression evt_id, Expression handles_exp)
 {
-       Expression evt_target;
        Location loc = lexer.Location;
        
        Statement addhnd = (Statement) new AddHandler (evt_id, 
                                                                                                        handles_exp, 
                                                                                                        loc);                                                                                                   
-                                                                                                       
        b.AddStatement (addhnd);
 }
 
@@ -4986,7 +5013,6 @@ private void RaiseEvent (string evt_name, ArrayList args)
 
 private void RemoveHandler (Block b, Expression evt_definition, Expression handler_exp)
 {
-       Expression evt_target;
        Location loc = lexer.Location;
        
        Statement rmhnd = (Statement) new RemoveHandler (evt_definition, 
@@ -5072,6 +5098,11 @@ protected override int parse ()
        with_stack = new Stack();
        statement_stack = new Stack();  
 
+       allow_global_attribs = true;
+       expecting_global_attribs = false;
+       expecting_local_attribs = false;
+       local_attrib_section_added = false;
+
        UseExtendedSyntax = name.EndsWith(".mbs");
        OptionExplicit = InitialOptionExplicit || UseExtendedSyntax;
        OptionStrict = InitialOptionStrict || UseExtendedSyntax;
@@ -5082,9 +5113,8 @@ protected override int parse ()
        ifElseStateMachine = new IfElseStateMachine();
        tokenizerController = new TokenizerController(lexer);
        
-       StringBuilder value = new StringBuilder ();
        try {
-               if (yacc_verbose_flag)
+               if (yacc_verbose_flag > 0)
                        yyparse (lexer, new yydebug.yyDebugSimple ());
                else {
                        yyparse (lexer);