mcs/gmcs/cs-parser.jay

   1 %{
   2 //
   3 // cs-parser.jay: The Parser for the C# compiler
   4 //
   5 // Authors: Miguel de Icaza (miguel@gnu.org)
   6 //          Ravi Pratap     (ravi@ximian.com)
   7 //
   8 // Licensed under the terms of the GNU GPL
   9 //
  10 // (C) 2001 Ximian, Inc (http://www.ximian.com)
  11 //
  12 // TODO:
  13 //   (1) Figure out why error productions dont work.  `type-declaration' is a
  14 //       great spot to put an `error' because you can reproduce it with this input:
  15 //       "public X { }"
  16 //
  17 // Possible optimization:
  18 //   Run memory profiler with parsing only, and consider dropping
  19 //   arraylists where not needed.   Some pieces can use linked lists.
  20 //
  21 using System.Text;
  22 using System.IO;
  23 using System;
  24
  25 namespace Mono.CSharp
  26 {
  27         using System.Collections;
  28
  29         /// <summary>
  30         ///    The C# Parser
  31         /// </summary>
  32         public class CSharpParser {
  33                 NamespaceEntry  current_namespace;
  34                 TypeContainer   current_container;
  35
  36                 IIteratorContainer iterator_container;
  37
  38                 /// <summary>
  39                 ///   Current block is used to add statements as we find
  40                 ///   them.
  41                 /// </summary>
  42
  43                 Block      current_block;
  44
  45                 /// <summary>
  46                 ///   If true, creates a toplevel block in the block production
  47                 ///   This is flagged by the delegate creation
  48                 /// </summary>
  49                 bool       create_toplevel_block;
  50
  51                 /// <summary>
  52                 /// <summary>
  53                 ///   Current interface is used by the various declaration
  54                 ///   productions in the interface declaration to "add"
  55                 ///   the interfaces as we find them.
  56                 /// </summary>
  57                 Interface  current_interface;
  58
  59                 /// <summary>
  60                 ///   This is used by the unary_expression code to resolve
  61                 ///   a name against a parameter.
  62                 /// </summary>
  63                 Parameters current_local_parameters;
  64
  65                 /// <summary>
  66                 ///   Using during property parsing to describe the implicit
  67                 ///   value parameter that is passed to the "set" and "get"accesor
  68                 ///   methods (properties and indexers).
  69                 /// </summary>
  70                 Expression implicit_value_parameter_type;
  71                 Parameters indexer_parameters;
  72
  73                 /// <summary>
  74                 ///   Used to determine if we are parsing the get/set pair
  75                 ///   of an indexer or a property
  76                 /// </summmary>
  77                 bool  parsing_indexer;
  78
  79                 ///
  80                 /// An out-of-band stack.
  81                 ///
  82                 Stack oob_stack;
  83
  84                 ///
  85                 /// Switch stack.
  86                 ///
  87                 Stack switch_stack;
  88
  89                 public bool yacc_verbose_flag;
  90
  91                 // Name of the file we are parsing
  92                 public string name;
  93
  94                 ///
  95                 /// The current file.
  96                 ///
  97                 SourceFile file;
  98 %}
  99
 100 %token EOF
 101 %token NONE   /* This token is never returned by our lexer */
 102 %token ERROR            // This is used not by the parser, but by the tokenizer.
 103                         // do not remove.
 104
 105 /*
 106  *These are the C# keywords
 107  */
 108 %token FIRST_KEYWORD
 109 %token ABSTRACT
 110 %token AS
 111 %token ADD
 112 %token ASSEMBLY
 113 %token BASE
 114 %token BOOL
 115 %token BREAK
 116 %token BYTE
 117 %token CASE
 118 %token CATCH
 119 %token CHAR
 120 %token CHECKED
 121 %token CLASS
 122 %token CONST
 123 %token CONTINUE
 124 %token DECIMAL
 125 %token DEFAULT
 126 %token DELEGATE
 127 %token DO
 128 %token DOUBLE
 129 %token ELSE
 130 %token ENUM
 131 %token EVENT
 132 %token EXPLICIT
 133 %token EXTERN
 134 %token FALSE
 135 %token FINALLY
 136 %token FIXED
 137 %token FLOAT
 138 %token FOR
 139 %token FOREACH
 140 %token GOTO
 141 %token IF
 142 %token IMPLICIT
 143 %token IN
 144 %token INT
 145 %token INTERFACE
 146 %token INTERNAL
 147 %token IS
 148 %token LOCK
 149 %token LONG
 150 %token NAMESPACE
 151 %token NEW
 152 %token NULL
 153 %token OBJECT
 154 %token OPERATOR
 155 %token OUT
 156 %token OVERRIDE
 157 %token PARAMS
 158 %token PRIVATE
 159 %token PROTECTED
 160 %token PUBLIC
 161 %token READONLY
 162 %token REF
 163 %token RETURN
 164 %token REMOVE
 165 %token SBYTE
 166 %token SEALED
 167 %token SHORT
 168 %token SIZEOF
 169 %token STACKALLOC
 170 %token STATIC
 171 %token STRING
 172 %token STRUCT
 173 %token SWITCH
 174 %token THIS
 175 %token THROW
 176 %token TRUE
 177 %token TRY
 178 %token TYPEOF
 179 %token UINT
 180 %token ULONG
 181 %token UNCHECKED
 182 %token UNSAFE
 183 %token USHORT
 184 %token USING
 185 %token VIRTUAL
 186 %token VOID
 187 %token VOLATILE
 188 %token WHERE
 189 %token WHILE
 190
 191 /* C# keywords which are not really keywords */
 192 %token GET           "get"
 193 %token SET           "set"
 194
 195 %left LAST_KEYWORD
 196
 197 /* C# single character operators/punctuation. */
 198 %token OPEN_BRACE    "{"
 199 %token CLOSE_BRACE   "}"
 200 %token OPEN_BRACKET  "["
 201 %token CLOSE_BRACKET "]"
 202 %token OPEN_PARENS   "("
 203 %token CLOSE_PARENS  ")"
 204 %token DOT           "."
 205 %token COMMA         ","
 206 %token COLON         ":"
 207 %token SEMICOLON     ";"
 208 %token TILDE         "~"
 209
 210 %token PLUS           "+"
 211 %token MINUS          "-"
 212 %token BANG           "!"
 213 %token ASSIGN         "="
 214 %token OP_LT          "<"
 215 %token OP_GENERICS_LT "<"
 216 %token OP_GT          ">"
 217 %token OP_GENERICS_GT ">"
 218 %token BITWISE_AND    "&"
 219 %token BITWISE_OR     "|"
 220 %token STAR           "*"
 221 %token PERCENT        "%"
 222 %token DIV            "/"
 223 %token CARRET         "^"
 224 %token INTERR         "?"
 225
 226 /* C# multi-character operators. */
 227 %token OP_INC                 "++"
 228 %token OP_DEC                 "--"
 229 %token OP_SHIFT_LEFT          "<<"
 230 %token OP_SHIFT_RIGHT         ">>"
 231 %token OP_LE                  "<="
 232 %token OP_GE                  ">="
 233 %token OP_EQ                  "=="
 234 %token OP_NE                  "!="
 235 %token OP_AND                 "&&"
 236 %token OP_OR                  "||"
 237 %token OP_MULT_ASSIGN         "*="
 238 %token OP_DIV_ASSIGN          "/="
 239 %token OP_MOD_ASSIGN          "%="
 240 %token OP_ADD_ASSIGN          "+="
 241 %token OP_SUB_ASSIGN          "-="
 242 %token OP_SHIFT_LEFT_ASSIGN   "<<="
 243 %token OP_SHIFT_RIGHT_ASSIGN  ">>="
 244 %token OP_AND_ASSIGN          "&="
 245 %token OP_XOR_ASSIGN          "^="
 246 %token OP_OR_ASSIGN           "|="
 247 %token OP_PTR                 "->"
 248
 249 /* Numbers */
 250 %token LITERAL_INTEGER           "int literal"
 251 %token LITERAL_FLOAT             "float literal"
 252 %token LITERAL_DOUBLE            "double literal"
 253 %token LITERAL_DECIMAL           "decimal literal"
 254 %token LITERAL_CHARACTER         "character literal"
 255 %token LITERAL_STRING            "string literal"
 256
 257 %token IDENTIFIER
 258 %token CLOSE_PARENS_CAST
 259 %token CLOSE_PARENS_NO_CAST
 260 %token CLOSE_PARENS_OPEN_PARENS
 261 %token CLOSE_PARENS_MINUS
 262
 263 /* Add precedence rules to solve dangling else s/r conflict */
 264 %nonassoc LOWPREC
 265 %nonassoc IF
 266 %nonassoc ELSE
 267 %right ASSIGN
 268 %left OP_OR
 269 %left OP_AND
 270 %left BITWISE_OR
 271 %left BITWISE_AND
 272 %left OP_SHIFT_LEFT OP_SHIFT_RIGHT
 273 %left PLUS MINUS
 274 %left STAR DIV PERCENT
 275 %right BANG CARRET UMINUS
 276 %nonassoc OP_INC OP_DEC
 277 %left OPEN_PARENS
 278 %left OPEN_BRACKET OPEN_BRACE
 279 %left DOT
 280 %nonassoc HIGHPREC
 281
 282 %start compilation_unit
 283 %%
 284
 285 compilation_unit
 286         : outer_declarations opt_EOF
 287         | outer_declarations attribute_sections opt_EOF
 288         | attribute_sections opt_EOF
 289         | opt_EOF /* allow empty files */
 290         ;
 291
 292 opt_EOF
 293         : /* empty */
 294         | EOF
 295         ;
 296
 297 outer_declarations
 298         : outer_declaration
 299         | outer_declarations outer_declaration
 300         ;
 301
 302 outer_declaration
 303         : using_directive
 304         | namespace_member_declaration
 305         ;
 306
 307 using_directives
 308         : using_directive
 309         | using_directives using_directive
 310         ;
 311
 312 using_directive
 313         : using_alias_directive
 314         | using_namespace_directive
 315         ;
 316
 317 using_alias_directive
 318         : USING IDENTIFIER ASSIGN
 319           namespace_or_type_name SEMICOLON
 320           {
 321                   current_namespace.UsingAlias ((string) $2, (Expression) $4, lexer.Location);
 322           }
 323         | USING error {
 324                 CheckIdentifierToken (yyToken);
 325           }
 326         ;
 327
 328 using_namespace_directive
 329         : USING namespace_name SEMICOLON
 330           {
 331                 current_namespace.Using ((string) $2, lexer.Location);
 332           }
 333         ;
 334
 335 //
 336 // Strictly speaking, namespaces don't have attributes but
 337 // we parse global attributes along with namespace declarations and then
 338 // detach them
 339 //
 340 namespace_declaration
 341         : opt_attributes NAMESPACE namespace_or_type_name
 342         {
 343                 Attributes attrs = (Attributes) $1;
 344
 345                 if (attrs != null) {
 346                         foreach (AttributeSection asec in attrs.AttributeSections)
 347                                 if (asec.Target == "assembly")
 348                                         CodeGen.Assembly.AddAttribute (current_container, asec);
 349                                 else
 350                                         Report.Error(1518, Lexer.Location,
 351                                         "Attributes cannot be applied to namespaces."
 352                                         + " Expected class, delegate, enum, interface, or struct");
 353                 }
 354
 355                 current_namespace = RootContext.Tree.RecordNamespace (current_namespace, file, $3.ToString (), lexer.Location);
 356         }
 357           namespace_body opt_semicolon
 358           {
 359                 current_namespace = current_namespace.Parent;
 360           }
 361         ;
 362
 363 opt_semicolon
 364         : /* empty */
 365         | SEMICOLON
 366         ;
 367
 368 opt_comma
 369         : /* empty */
 370         | COMMA
 371         ;
 372
 373 namespace_name
 374         : namespace_or_type_name { $$ = ($1).ToString (); }
 375         ;
 376
 377 namespace_body
 378         : OPEN_BRACE
 379           opt_using_directives
 380           opt_namespace_member_declarations
 381           CLOSE_BRACE
 382           {
 383           }
 384         ;
 385
 386 opt_using_directives
 387         : /* empty */
 388         | using_directives
 389         ;
 390
 391 opt_namespace_member_declarations
 392         : /* empty */
 393         | namespace_member_declarations
 394         ;
 395
 396 namespace_member_declarations
 397         : namespace_member_declaration
 398         | namespace_member_declarations namespace_member_declaration
 399         ;
 400
 401 namespace_member_declaration
 402         : type_declaration
 403           {
 404                 string name = "";
 405                 int mod_flags;
 406
 407                 if ($1 is Class){
 408                         Class c = (Class) $1;
 409                         mod_flags = c.ModFlags;
 410                         name = c.Name;
 411                 } else if ($1 is Struct){
 412                         Struct s = (Struct) $1;
 413                         mod_flags = s.ModFlags;
 414                         name = s.Name;
 415                 } else
 416                         break;
 417
 418                 if ((mod_flags & (Modifiers.PRIVATE|Modifiers.PROTECTED)) != 0){
 419                         Report.Error (
 420                                 1527, lexer.Location,
 421                                 "Namespace elements cant be explicitly " +
 422                                 "declared private or protected in `" + name + "'");
 423                 }
 424                 current_namespace.DeclarationFound = true;
 425           }
 426         | namespace_declaration {
 427                 current_namespace.DeclarationFound = true;
 428           }
 429
 430         | field_declaration {
 431                 Report.Error (116, lexer.Location, "A namespace can only contain types and namespace declarations");
 432           }
 433         | method_declaration {
 434                 Report.Error (116, lexer.Location, "A namespace can only contain types and namespace declarations");
 435           }
 436         ;
 437
 438 type_declaration
 439         : class_declaration
 440         | struct_declaration
 441         | interface_declaration
 442         | enum_declaration
 443         | delegate_declaration
 444 //
 445 // Enable this when we have handled all errors, because this acts as a generic fallback
 446 //
 447 //      | error {
 448 //              Console.WriteLine ("Token=" + yyToken);
 449 //              Report.Error (1518, lexer.Location, "Expected class, struct, interface, enum or delegate");
 450 //        }
 451         ;
 452
 453 //
 454 // Attributes 17.2
 455 //
 456
 457 opt_attributes
 458         : /* empty */
 459         | attribute_sections { $$ = $1; }
 460         ;
 461
 462 attribute_sections
 463         : attribute_section
 464           {
 465                 AttributeSection sect = (AttributeSection) $1;
 466
 467                 if (sect.Target == "assembly") {
 468                         CodeGen.Assembly.AddAttribute (current_container, sect);
 469                         $$ = null;
 470                 }
 471                 else if (sect.Target == "module") {
 472                         CodeGen.Module.AddAttribute (current_container, sect);
 473                         $$ = null;
 474                 }
 475                 else
 476                         $$ = new Attributes (sect);
 477           }
 478         | attribute_sections attribute_section
 479           {
 480                 Attributes attrs = $1 as Attributes;
 481                 AttributeSection sect = (AttributeSection) $2;
 482
 483                 if (sect.Target == "assembly") {
 484                         CodeGen.Assembly.AddAttribute (current_container, sect);
 485                 }
 486                 else if (sect.Target == "module") {
 487                         CodeGen.Module.AddAttribute (current_container, sect);
 488                 }
 489                 else {
 490                         if (attrs == null)
 491                                 attrs = new Attributes (sect);
 492                         else
 493                         attrs.AddAttributeSection (sect);
 494                 }
 495
 496                 $$ = attrs;
 497           }
 498         ;
 499
 500 attribute_section
 501         : OPEN_BRACKET attribute_target_specifier attribute_list opt_comma CLOSE_BRACKET
 502           {
 503                 string target = null;
 504
 505                 if ($2 != null)
 506                         target = (string) $2;
 507
 508                 $$ = new AttributeSection (target, (ArrayList) $3);
 509           }
 510         | OPEN_BRACKET attribute_list opt_comma CLOSE_BRACKET
 511           {
 512                 $$ = new AttributeSection (null, (ArrayList) $2);
 513           }
 514         ;
 515
 516 attribute_target_specifier
 517         : attribute_target COLON
 518           {
 519                 $$ = $1;
 520           }
 521         ;
 522
 523 attribute_target
 524         : IDENTIFIER
 525           {
 526                 CheckAttributeTarget ((string) $1);
 527                 $$ = $1;
 528           }
 529         | EVENT  { $$ = "event"; }
 530         | RETURN { $$ = "return"; }
 531         ;
 532
 533 attribute_list
 534         : attribute
 535           {
 536                 ArrayList attrs = new ArrayList (4);
 537                 attrs.Add ($1);
 538
 539                 $$ = attrs;
 540
 541           }
 542         | attribute_list COMMA attribute
 543           {
 544                 ArrayList attrs = (ArrayList) $1;
 545                 attrs.Add ($3);
 546
 547                 $$ = attrs;
 548           }
 549         ;
 550
 551 attribute
 552         : attribute_name
 553           {
 554                 $$ = lexer.Location;
 555           }
 556           opt_attribute_arguments
 557           {
 558                 //
 559                 // Attributes need a string, not an expression: generic types will fail here.
 560                 //
 561                 $$ = new Attribute (((Expression) $1).ToString (), (ArrayList) $3, (Location) $2);
 562           }
 563         ;
 564
 565 attribute_name
 566         : type_name  { /* reserved attribute name or identifier: 17.4 */ }
 567         ;
 568
 569 opt_attribute_arguments
 570         : /* empty */   { $$ = null; }
 571         | OPEN_PARENS attribute_arguments CLOSE_PARENS
 572           {
 573                 $$ = $2;
 574           }
 575         ;
 576
 577
 578 attribute_arguments
 579         : opt_positional_argument_list
 580           {
 581                 if ($1 == null)
 582                         $$ = null;
 583                 else {
 584                         ArrayList args = new ArrayList (4);
 585                         args.Add ($1);
 586
 587                         $$ = args;
 588                 }
 589           }
 590         | positional_argument_list COMMA named_argument_list
 591           {
 592                 ArrayList args = new ArrayList (4);
 593                 args.Add ($1);
 594                 args.Add ($3);
 595
 596                 $$ = args;
 597           }
 598         | named_argument_list
 599           {
 600                 ArrayList args = new ArrayList (4);
 601                 args.Add (null);
 602                 args.Add ($1);
 603
 604                 $$ = args;
 605           }
 606         ;
 607
 608
 609 opt_positional_argument_list
 610         : /* empty */           { $$ = null; }
 611         | positional_argument_list
 612         ;
 613
 614 positional_argument_list
 615         : expression
 616           {
 617                 ArrayList args = new ArrayList (4);
 618                 args.Add (new Argument ((Expression) $1, Argument.AType.Expression));
 619
 620                 $$ = args;
 621           }
 622         | positional_argument_list COMMA expression
 623          {
 624                 ArrayList args = (ArrayList) $1;
 625                 args.Add (new Argument ((Expression) $3, Argument.AType.Expression));
 626
 627                 $$ = args;
 628          }
 629         ;
 630
 631 named_argument_list
 632         : named_argument
 633           {
 634                 ArrayList args = new ArrayList (4);
 635                 args.Add ($1);
 636
 637                 $$ = args;
 638           }
 639         | named_argument_list COMMA named_argument
 640           {
 641                 ArrayList args = (ArrayList) $1;
 642                 args.Add ($3);
 643
 644                 $$ = args;
 645           }
 646         ;
 647
 648 named_argument
 649         : IDENTIFIER ASSIGN expression
 650           {
 651                 $$ = new DictionaryEntry (
 652                         (string) $1,
 653                         new Argument ((Expression) $3, Argument.AType.Expression));
 654           }
 655         ;
 656
 657
 658 class_body
 659         :  OPEN_BRACE opt_class_member_declarations CLOSE_BRACE
 660         ;
 661
 662 opt_class_member_declarations
 663         : /* empty */
 664         | class_member_declarations
 665         ;
 666
 667 class_member_declarations
 668         : class_member_declaration
 669         | class_member_declarations
 670           class_member_declaration
 671         ;
 672
 673 class_member_declaration
 674         : constant_declaration                  // done
 675         | field_declaration                     // done
 676         | method_declaration                    // done
 677         | property_declaration                  // done
 678         | event_declaration                     // done
 679         | indexer_declaration                   // done
 680         | operator_declaration                  // done
 681         | constructor_declaration               // done
 682         | destructor_declaration                // done
 683         | type_declaration
 684         ;
 685
 686 struct_declaration
 687         : opt_attributes
 688           opt_modifiers
 689           STRUCT IDENTIFIER
 690           {
 691                 Struct new_struct;
 692                 string full_struct_name = MakeName ((string) $4);
 693
 694                 new_struct = new Struct (current_namespace, current_container, full_struct_name,
 695                                          (int) $2, (Attributes) $1, lexer.Location);
 696                 current_container = new_struct;
 697                 RootContext.Tree.RecordDecl (full_struct_name, new_struct);
 698                 lexer.ConstraintsParsing = true;
 699           }
 700           opt_type_parameter_list
 701           opt_class_base
 702           opt_type_parameter_constraints_clauses
 703           {
 704                 lexer.ConstraintsParsing = false;
 705           }
 706           struct_body
 707           opt_semicolon
 708           {
 709                 Struct new_struct = (Struct) current_container;
 710
 711                 if ($8 != null && $6 == null)
 712                         Report.Error (-200, new_struct.Location,
 713                                       "Type parameter constraints only valid if there is a type parameter list");
 714                 if ($6 != null)
 715                         CheckDef (new_struct.SetParameterInfo ((ArrayList) $6, (ArrayList) $8), new_struct.Name, new_struct.Location);
 716
 717                 if ($7 != null)
 718                         new_struct.Bases = (ArrayList) $7;
 719
 720                 current_container = current_container.Parent;
 721                 CheckDef (current_container.AddStruct (new_struct), new_struct.Name, new_struct.Location);
 722                 $$ = new_struct;
 723           }
 724         | opt_attributes opt_modifiers STRUCT error {
 725                 CheckIdentifierToken (yyToken);
 726           }
 727         ;
 728
 729 struct_body
 730         : OPEN_BRACE opt_struct_member_declarations CLOSE_BRACE
 731         ;
 732
 733 opt_struct_member_declarations
 734         : /* empty */
 735         | struct_member_declarations
 736         ;
 737
 738 struct_member_declarations
 739         : struct_member_declaration
 740         | struct_member_declarations struct_member_declaration
 741         ;
 742
 743 struct_member_declaration
 744         : constant_declaration
 745         | field_declaration
 746         | method_declaration
 747         | property_declaration
 748         | event_declaration
 749         | indexer_declaration
 750         | operator_declaration
 751         | constructor_declaration
 752         | type_declaration
 753
 754         /*
 755          * This is only included so we can flag error 575:
 756          * destructors only allowed on class types
 757          */
 758         | destructor_declaration
 759         ;
 760
 761 constant_declaration
 762         : opt_attributes
 763           opt_modifiers
 764           CONST
 765           type
 766           constant_declarators
 767           SEMICOLON
 768           {
 769                 foreach (VariableDeclaration constant in (ArrayList) $5){
 770                         Location l = constant.Location;
 771
 772                         Const c = new Const (
 773                                 (Expression) $4, (string) constant.identifier,
 774                                 (Expression) constant.expression_or_array_initializer, (int) $2,
 775                                 (Attributes) $1, l);
 776
 777                         CheckDef (current_container.AddConstant (c), c.Name, l);
 778                 }
 779           }
 780         ;
 781
 782 constant_declarators
 783         : constant_declarator
 784           {
 785                 ArrayList constants = new ArrayList (4);
 786                 constants.Add ($1);
 787                 $$ = constants;
 788           }
 789         | constant_declarators COMMA constant_declarator
 790           {
 791                 ArrayList constants = (ArrayList) $1;
 792
 793                 constants.Add ($3);
 794           }
 795         ;
 796
 797 constant_declarator
 798         : IDENTIFIER ASSIGN constant_expression
 799           {
 800                 $$ = new VariableDeclaration ((string) $1, $3, lexer.Location);
 801           }
 802         ;
 803
 804 field_declaration
 805         : opt_attributes
 806           opt_modifiers
 807           type
 808           variable_declarators
 809           SEMICOLON
 810           {
 811                 Expression type = (Expression) $3;
 812                 int mod = (int) $2;
 813
 814                 foreach (VariableDeclaration var in (ArrayList) $4){
 815                         Location l = var.Location;
 816
 817                         Field field = new Field (type, mod, var.identifier,
 818                                                  var.expression_or_array_initializer,
 819                                                  (Attributes) $1, l);
 820
 821                         CheckDef (current_container.AddField (field), field.Name, l);
 822                 }
 823           }
 824         | opt_attributes
 825           opt_modifiers
 826           VOID
 827           variable_declarators
 828           SEMICOLON {
 829                 Report.Error (670, lexer.Location, "void type is not allowed for fields");
 830           }
 831         ;
 832
 833 variable_declarators
 834         : variable_declarator
 835           {
 836                 ArrayList decl = new ArrayList (4);
 837                 decl.Add ($1);
 838                 $$ = decl;
 839           }
 840         | variable_declarators COMMA variable_declarator
 841           {
 842                 ArrayList decls = (ArrayList) $1;
 843                 decls.Add ($3);
 844                 $$ = $1;
 845           }
 846         ;
 847
 848 variable_declarator
 849         : IDENTIFIER ASSIGN variable_initializer
 850           {
 851                 $$ = new VariableDeclaration ((string) $1, $3, lexer.Location);
 852           }
 853         | IDENTIFIER
 854           {
 855                 $$ = new VariableDeclaration ((string) $1, null, lexer.Location);
 856           }
 857         ;
 858
 859 variable_initializer
 860         : expression
 861           {
 862                 $$ = $1;
 863           }
 864         | array_initializer
 865           {
 866                 $$ = $1;
 867           }
 868         | STACKALLOC type OPEN_BRACKET expression CLOSE_BRACKET
 869           {
 870                 $$ = new StackAlloc ((Expression) $2, (Expression) $4, lexer.Location);
 871           }
 872         ;
 873
 874 method_declaration
 875         : method_header {
 876                 iterator_container = (IIteratorContainer) $1;
 877           }
 878           method_body
 879           {
 880                 Method method = (Method) $1;
 881                 Block b = (Block) $3;
 882                 const int extern_abstract = (Modifiers.EXTERN | Modifiers.ABSTRACT);
 883
 884                 if (b == null){
 885                         if ((method.ModFlags & extern_abstract) == 0){
 886                                 Report.Error (
 887                                         501, lexer.Location,  current_container.MakeName (method.Name) +
 888                                         "must declare a body because it is not marked abstract or extern");
 889                         }
 890                 } else {
 891                         if ((method.ModFlags & Modifiers.EXTERN) != 0){
 892                                 Report.Error (
 893                                         179, lexer.Location, current_container.MakeName (method.Name) +
 894                                         " is declared extern, but has a body");
 895                         }
 896                 }
 897
 898                 method.Block = (Block) $3;
 899                 CheckDef (current_container.AddMethod (method), method.Name, method.Location);
 900
 901                 current_local_parameters = null;
 902                 iterator_container = null;
 903           }
 904         ;
 905
 906 opt_error_modifier
 907         : /* empty */
 908         | modifiers
 909           {
 910                 int m = (int) $1;
 911                 int i = 1;
 912
 913                 while (m != 0){
 914                         if ((i & m) != 0){
 915                                 Report.Error (
 916                                         1585, lexer.Location, "Member modifier `" +
 917                                         Modifiers.Name (i) + "' must precede member type and name");
 918                         }
 919                         m &= ~i;
 920                         i = i << 1;
 921                 }
 922           }
 923         ;
 924
 925 method_header
 926         : opt_attributes
 927           opt_modifiers
 928           type
 929           member_name
 930           opt_type_parameter_list
 931           OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
 932           {
 933                 lexer.ConstraintsParsing = true;
 934           }
 935           opt_type_parameter_constraints_clauses
 936           {
 937                 lexer.ConstraintsParsing = false;
 938                 if ($10 != null && $5 == null)
 939                         Report.Error (-200, lexer.Location,
 940                                       "Type parameter constraints only valid if there is a type parameter list");
 941
 942                 Method method;
 943
 944                 GenericMethod generic = null;
 945                 if ($5 != null) {
 946                         generic = new GenericMethod (current_namespace, current_container,
 947                                                      (string) $4, (Attributes) $1,
 948                                                      lexer.Location);
 949
 950                         CheckDef (generic.SetParameterInfo ((ArrayList) $5, (ArrayList) $10), generic.Name, generic.Location);
 951                         method = new Method (generic, (Expression) $3, (int) $2, (string) $4,
 952                                              (Parameters) $7, (Attributes) $1, lexer.Location);
 953                 } else
 954                         method = new Method (current_container, (Expression) $3, (int) $2, (string) $4,
 955                                              (Parameters) $7, (Attributes) $1, lexer.Location);
 956
 957                 current_local_parameters = (Parameters) $7;
 958
 959                 $$ = method;
 960           }
 961         | opt_attributes
 962           opt_modifiers
 963           VOID
 964           member_name
 965           opt_type_parameter_list
 966           OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
 967           {
 968                 lexer.ConstraintsParsing = true;
 969           }
 970           opt_type_parameter_constraints_clauses
 971           {
 972                 lexer.ConstraintsParsing = false;
 973                 if ($10 != null && $5 == null)
 974                         Report.Error (-200, lexer.Location,
 975                                       "Type parameter constraints only valid if there is a type parameter list");
 976
 977                 Method method;
 978                 GenericMethod generic = null;
 979                 if ($5 != null) {
 980                         generic = new GenericMethod (current_namespace, current_container,
 981                                                      (string) $4, (Attributes) $1,
 982                                                      lexer.Location);
 983
 984                         CheckDef (generic.SetParameterInfo ((ArrayList) $5, (ArrayList) $10), generic.Name, generic.Location);
 985
 986                         method = new Method (generic, TypeManager.system_void_expr, (int) $2,
 987                                             (string) $4, (Parameters) $7, (Attributes) $1,
 988                                             lexer.Location);
 989                 } else
 990                         method = new Method (current_container, TypeManager.system_void_expr, (int) $2,
 991                                             (string) $4, (Parameters) $7, (Attributes) $1,
 992                                             lexer.Location);
 993
 994                 current_local_parameters = (Parameters) $7;
 995
 996                 $$ = method;
 997           }
 998         | opt_attributes
 999           opt_modifiers
1000           type
1001           modifiers member_name OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
1002           {
1003                 Report.Error (1585, lexer.Location,
1004                         String.Format ("Modifier {0} should appear before type",
1005                                 Modifiers.Name ((int) $4)));
1006                 Method method = new Method (current_container, TypeManager.system_void_expr, 0,
1007                                             (string) $5, (Parameters) $7, (Attributes) $1,
1008                                             lexer.Location);
1009
1010                 current_local_parameters = (Parameters) $7;
1011                 $$ = method;
1012           }
1013         ;
1014
1015 method_body
1016         : block
1017         | SEMICOLON             { $$ = null; }
1018         ;
1019
1020 opt_formal_parameter_list
1021         : /* empty */                   { $$ = Parameters.EmptyReadOnlyParameters; }
1022         | formal_parameter_list
1023         ;
1024
1025 formal_parameter_list
1026         : fixed_parameters
1027           {
1028                 ArrayList pars_list = (ArrayList) $1;
1029
1030                 Parameter [] pars = new Parameter [pars_list.Count];
1031                 pars_list.CopyTo (pars);
1032
1033                 $$ = new Parameters (pars, null, lexer.Location);
1034           }
1035         | fixed_parameters COMMA parameter_array
1036           {
1037                 ArrayList pars_list = (ArrayList) $1;
1038
1039                 Parameter [] pars = new Parameter [pars_list.Count];
1040                 pars_list.CopyTo (pars);
1041
1042                 $$ = new Parameters (pars, (Parameter) $3, lexer.Location);
1043           }
1044         | parameter_array
1045           {
1046                 $$ = new Parameters (null, (Parameter) $1, lexer.Location);
1047           }
1048         ;
1049
1050 fixed_parameters
1051         : fixed_parameter
1052           {
1053                 ArrayList pars = new ArrayList (4);
1054
1055                 pars.Add ($1);
1056                 $$ = pars;
1057           }
1058         | fixed_parameters COMMA fixed_parameter
1059           {
1060                 ArrayList pars = (ArrayList) $1;
1061
1062                 pars.Add ($3);
1063                 $$ = $1;
1064           }
1065         ;
1066
1067 fixed_parameter
1068         : opt_attributes
1069           opt_parameter_modifier
1070           type
1071           IDENTIFIER
1072           {
1073                 $$ = new Parameter ((Expression) $3, (string) $4, (Parameter.Modifier) $2, (Attributes) $1);
1074           }
1075         | opt_attributes
1076           opt_parameter_modifier
1077           type
1078           error {
1079                 CheckIdentifierToken (yyToken);
1080                 $$ = null;
1081           }
1082         ;
1083
1084 opt_parameter_modifier
1085         : /* empty */           { $$ = Parameter.Modifier.NONE; }
1086         | parameter_modifier
1087         ;
1088
1089 parameter_modifier
1090         : REF                   { $$ = Parameter.Modifier.REF | Parameter.Modifier.ISBYREF; }
1091         | OUT                   { $$ = Parameter.Modifier.OUT | Parameter.Modifier.ISBYREF; }
1092         ;
1093
1094 parameter_array
1095         : opt_attributes PARAMS type IDENTIFIER
1096           {
1097                 $$ = new Parameter ((Expression) $3, (string) $4, Parameter.Modifier.PARAMS, (Attributes) $1);
1098                 note ("type must be a single-dimension array type");
1099           }
1100         | opt_attributes PARAMS type error {
1101                 CheckIdentifierToken (yyToken);
1102                 $$ = null;
1103           }
1104         ;
1105
1106 member_name
1107         : IDENTIFIER
1108         | member_name DOT IDENTIFIER {
1109                 $$ = String.Concat ((string) $1, ".", $3);
1110           }
1111         ;
1112
1113 property_declaration
1114         : opt_attributes
1115           opt_modifiers
1116           type member_name
1117           OPEN_BRACE
1118           {
1119                 implicit_value_parameter_type = (Expression) $3;
1120
1121                 lexer.PropertyParsing = true;
1122
1123                 $$ = lexer.Location;
1124
1125                 iterator_container = SimpleIteratorContainer.GetSimple ();
1126           }
1127           accessor_declarations
1128           {
1129                 lexer.PropertyParsing = false;
1130           }
1131           CLOSE_BRACE
1132           {
1133                 Property prop;
1134                 Pair pair = (Pair) $7;
1135                 Accessor get_block = (Accessor) pair.First;
1136                 Accessor set_block = (Accessor) pair.Second;
1137
1138                 Location loc = (Location) $6;
1139                 prop = new Property (current_container, (Expression) $3, (string) $4, (int) $2,
1140                                      get_block, set_block, (Attributes) $1, loc);
1141                 if (SimpleIteratorContainer.Simple.Yields)
1142                         prop.SetYields ();
1143
1144                 CheckDef (current_container.AddProperty (prop), prop.Name, loc);
1145                 implicit_value_parameter_type = null;
1146                 iterator_container = null;
1147           }
1148         ;
1149
1150 accessor_declarations
1151         : get_accessor_declaration opt_set_accessor_declaration
1152           {
1153                 $$ = new Pair ($1, $2);
1154           }
1155         | set_accessor_declaration opt_get_accessor_declaration
1156           {
1157                 $$ = new Pair ($2, $1);
1158           }
1159         ;
1160
1161 opt_get_accessor_declaration
1162         : /* empty */                   { $$ = null; }
1163         | get_accessor_declaration
1164         ;
1165
1166 opt_set_accessor_declaration
1167         : /* empty */                   { $$ = null; }
1168         | set_accessor_declaration
1169         ;
1170
1171 get_accessor_declaration
1172         : opt_attributes GET
1173           {
1174                 // If this is not the case, then current_local_parameters has already
1175                 // been set in indexer_declaration
1176                 if (parsing_indexer == false)
1177                         current_local_parameters = null;
1178                 else
1179                         current_local_parameters = indexer_parameters;
1180                 lexer.PropertyParsing = false;
1181           }
1182           accessor_body
1183           {
1184                 $$ = new Accessor ((Block) $4, (Attributes) $1);
1185                 current_local_parameters = null;
1186                 lexer.PropertyParsing = true;
1187           }
1188         ;
1189
1190 set_accessor_declaration
1191         : opt_attributes SET
1192           {
1193                 Parameter [] args;
1194                 Parameter implicit_value_parameter = new Parameter (
1195                         implicit_value_parameter_type, "value",
1196                         Parameter.Modifier.NONE, null);
1197
1198                 if (parsing_indexer == false) {
1199                         args  = new Parameter [1];
1200                         args [0] = implicit_value_parameter;
1201                         current_local_parameters = new Parameters (args, null, lexer.Location);
1202                 } else {
1203                         Parameter [] fpars = indexer_parameters.FixedParameters;
1204
1205                         if (fpars != null){
1206                                 int count = fpars.Length;
1207
1208                                 args = new Parameter [count + 1];
1209                                 fpars.CopyTo (args, 0);
1210                                 args [count] = implicit_value_parameter;
1211                         } else
1212                                 args = null;
1213                         current_local_parameters = new Parameters (
1214                                 args, indexer_parameters.ArrayParameter, lexer.Location);
1215                 }
1216
1217                 lexer.PropertyParsing = false;
1218           }
1219           accessor_body
1220           {
1221                 $$ = new Accessor ((Block) $4, (Attributes) $1);
1222                 current_local_parameters = null;
1223                 lexer.PropertyParsing = true;
1224           }
1225         ;
1226
1227 accessor_body
1228         : block
1229         | SEMICOLON             { $$ = null; }
1230         ;
1231
1232 interface_declaration
1233         : opt_attributes
1234           opt_modifiers
1235           INTERFACE IDENTIFIER
1236           {
1237                 Interface new_interface;
1238                 string full_interface_name = MakeName ((string) $4);
1239
1240                 new_interface = new Interface (current_namespace, current_container, full_interface_name,
1241                                                (int) $2, (Attributes) $1, lexer.Location);
1242                 if (current_interface != null) {
1243                         Location l = lexer.Location;
1244                         Report.Error (-2, l, "Internal compiler error: interface inside interface");
1245                 }
1246                 current_interface = new_interface;
1247                 RootContext.Tree.RecordDecl (full_interface_name, new_interface);
1248                 lexer.ConstraintsParsing = true;
1249           }
1250           opt_type_parameter_list
1251           opt_interface_base
1252           opt_type_parameter_constraints_clauses
1253           {
1254                 lexer.ConstraintsParsing = false;
1255           }
1256           interface_body opt_semicolon
1257           {
1258                 Interface new_interface = (Interface) current_interface;
1259
1260                 if ($8 != null && $6 == null)
1261                         Report.Error (-200, new_interface.Location,
1262                                       "Type parameter constraints only valid if there is a type parameter list");
1263
1264                 if ($6 != null)
1265                         CheckDef (new_interface.SetParameterInfo ((ArrayList) $6, (ArrayList) $8), new_interface.Name, new_interface.Location);
1266                 if ($7 != null)
1267                         new_interface.Bases = (ArrayList) $7;
1268
1269                 current_interface = null;
1270                 CheckDef (current_container.AddInterface (new_interface),
1271                           new_interface.Name, new_interface.Location);
1272           }
1273         | opt_attributes opt_modifiers INTERFACE error {
1274                 CheckIdentifierToken (yyToken);
1275           }
1276         ;
1277
1278 opt_interface_base
1279         : /* empty */                     { $$ = null; }
1280         | interface_base
1281         ;
1282
1283 interface_base
1284         : COLON interface_type_list       { $$ = $2; }
1285         ;
1286
1287 interface_type_list
1288         : interface_type
1289           {
1290                 ArrayList interfaces = new ArrayList (4);
1291
1292                 interfaces.Add ($1);
1293                 $$ = interfaces;
1294           }
1295         | interface_type_list COMMA interface_type
1296           {
1297                 ArrayList interfaces = (ArrayList) $1;
1298                 interfaces.Add ($3);
1299                 $$ = interfaces;
1300           }
1301         ;
1302
1303 interface_body
1304         : OPEN_BRACE
1305           opt_interface_member_declarations
1306           CLOSE_BRACE
1307         ;
1308
1309 opt_interface_member_declarations
1310         : /* empty */
1311         | interface_member_declarations
1312         ;
1313
1314 interface_member_declarations
1315         : interface_member_declaration
1316         | interface_member_declarations interface_member_declaration
1317         ;
1318
1319 interface_member_declaration
1320         : interface_method_declaration
1321           {
1322                 InterfaceMethod m = (InterfaceMethod) $1;
1323
1324                 CheckDef (current_interface.AddMethod (m), m.Name, m.Location);
1325           }
1326         | interface_property_declaration
1327           {
1328                 InterfaceProperty p = (InterfaceProperty) $1;
1329
1330                 CheckDef (current_interface.AddProperty (p), p.Name, p.Location);
1331           }
1332         | interface_event_declaration
1333           {
1334                 if ($1 != null){
1335                 InterfaceEvent e = (InterfaceEvent) $1;
1336                 CheckDef (current_interface.AddEvent (e), e.Name, lexer.Location);
1337           }
1338           }
1339         | interface_indexer_declaration
1340           {
1341                 InterfaceIndexer i = (InterfaceIndexer) $1;
1342
1343                 CheckDef (current_interface.AddIndexer (i), "indexer", i.Location);
1344           }
1345         ;
1346
1347 opt_new
1348         : opt_modifiers
1349           {
1350                 int val = (int) $1;
1351
1352                 val = Modifiers.Check (Modifiers.NEW, val, 0, lexer.Location);
1353                 $$ = (bool) (val != 0);
1354           }
1355         ;
1356
1357 interface_method_declaration
1358         : opt_attributes opt_new type IDENTIFIER
1359           OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
1360           SEMICOLON
1361           {
1362                 $$ = new InterfaceMethod ((Expression) $3, (string) $4, (bool) $2,
1363                                           (Parameters) $6, (Attributes) $1, lexer.Location);
1364           }
1365         | opt_attributes opt_new VOID IDENTIFIER
1366           OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
1367           SEMICOLON
1368           {
1369                 $$ = new InterfaceMethod (
1370                         TypeManager.system_void_expr, (string) $4, (bool) $2, (Parameters) $6,
1371                                           (Attributes) $1, lexer.Location);
1372           }
1373         ;
1374
1375 interface_property_declaration
1376         : opt_attributes
1377           opt_new
1378           type IDENTIFIER
1379           OPEN_BRACE
1380           { lexer.PropertyParsing = true; }
1381           interface_accessors
1382           { lexer.PropertyParsing = false; }
1383           CLOSE_BRACE
1384           {
1385                 InterfaceAccessorInfo pinfo = (InterfaceAccessorInfo) $7;
1386
1387                 $$ = new InterfaceProperty ((Expression) $3, (string) $4, (bool) $2,
1388                                             pinfo.has_get, pinfo.has_set, (Attributes) $1,
1389                                             pinfo.get_attrs, pinfo.set_attrs,
1390                                             lexer.Location);
1391           }
1392         | opt_attributes
1393           opt_new
1394           type error {
1395                 CheckIdentifierToken (yyToken);
1396                 $$ = null;
1397           }
1398         ;
1399
1400 interface_accessors
1401         : opt_attributes GET SEMICOLON          { $$ = new InterfaceAccessorInfo (true, false, (Attributes) $1, null); }
1402         | opt_attributes SET SEMICOLON          { $$ = new InterfaceAccessorInfo (false, true, null, (Attributes) $1); }
1403         | opt_attributes GET SEMICOLON opt_attributes SET SEMICOLON
1404           { $$ = new InterfaceAccessorInfo (true, true, (Attributes) $1, (Attributes) $3); }
1405         | opt_attributes SET SEMICOLON opt_attributes GET SEMICOLON
1406           { $$ = new InterfaceAccessorInfo (true, true, (Attributes) $3, (Attributes) $1); }
1407         ;
1408
1409 interface_event_declaration
1410         : opt_attributes opt_new EVENT type IDENTIFIER SEMICOLON
1411           {
1412                 $$ = new InterfaceEvent ((Expression) $4, (string) $5, (bool) $2, (Attributes) $1,
1413                                          lexer.Location);
1414           }
1415         | opt_attributes opt_new EVENT type error {
1416                 CheckIdentifierToken (yyToken);
1417                 $$ = null;
1418           }
1419         | opt_attributes opt_new EVENT type IDENTIFIER ASSIGN  {
1420                 Report.Error (68, lexer.Location, "Event declarations on interfaces can not be initialized.");
1421                 $$ = null;
1422           }
1423         | opt_attributes opt_new EVENT type IDENTIFIER OPEN_BRACE event_accessor_declarations CLOSE_BRACE {
1424                 Report.Error (69, lexer.Location, "Event accessors not valid on interfaces");
1425                 $$ = null;
1426           }
1427         ;
1428
1429 interface_indexer_declaration
1430         : opt_attributes opt_new type THIS
1431           OPEN_BRACKET formal_parameter_list CLOSE_BRACKET
1432           OPEN_BRACE
1433           { lexer.PropertyParsing = true; }
1434           interface_accessors
1435           { lexer.PropertyParsing = false; }
1436           CLOSE_BRACE
1437           {
1438                 InterfaceAccessorInfo info = (InterfaceAccessorInfo) $10;
1439
1440                 bool do_get = info.has_get;
1441                 bool do_set = info.has_set;
1442
1443                 $$ = new InterfaceIndexer ((Expression) $3, (Parameters) $6, do_get, do_set,
1444                                            (bool) $2, (Attributes) $1, (Attributes) info.get_attrs,
1445                                            (Attributes) info.set_attrs, lexer.Location);
1446           }
1447         ;
1448
1449 operator_declaration
1450         : opt_attributes opt_modifiers operator_declarator
1451           {
1452                 iterator_container = SimpleIteratorContainer.GetSimple ();
1453           }
1454           operator_body
1455           {
1456                 OperatorDeclaration decl = (OperatorDeclaration) $3;
1457
1458                 Operator op = new Operator (decl.optype, decl.ret_type, (int) $2, decl.arg1type, decl.arg1name,
1459                                             decl.arg2type, decl.arg2name, (Block) $5, (Attributes) $1, decl.location);
1460
1461                 if (SimpleIteratorContainer.Simple.Yields)
1462                         op.SetYields ();
1463
1464                 // Note again, checking is done in semantic analysis
1465                 current_container.AddOperator (op);
1466
1467                 current_local_parameters = null;
1468                 iterator_container = null;
1469           }
1470         ;
1471
1472 operator_body
1473         : block
1474         | SEMICOLON { $$ = null; }
1475         ;
1476 operator_declarator
1477         : type OPERATOR overloadable_operator
1478           OPEN_PARENS type IDENTIFIER CLOSE_PARENS
1479         {
1480                 Operator.OpType op = (Operator.OpType) $3;
1481                 CheckUnaryOperator (op);
1482
1483                 if (op == Operator.OpType.Addition)
1484                         op = Operator.OpType.UnaryPlus;
1485
1486                 if (op == Operator.OpType.Subtraction)
1487                         op = Operator.OpType.UnaryNegation;
1488
1489                 Parameter [] pars = new Parameter [1];
1490
1491                 pars [0] = new Parameter ((Expression) $5, (string) $6, Parameter.Modifier.NONE, null);
1492
1493                 current_local_parameters = new Parameters (pars, null, lexer.Location);
1494
1495                 $$ = new OperatorDeclaration (op, (Expression) $1, (Expression) $5, (string) $6,
1496                                               null, null, lexer.Location);
1497         }
1498         | type OPERATOR overloadable_operator
1499           OPEN_PARENS
1500                 type IDENTIFIER COMMA
1501                 type IDENTIFIER
1502           CLOSE_PARENS
1503         {
1504                CheckBinaryOperator ((Operator.OpType) $3);
1505
1506                Parameter [] pars = new Parameter [2];
1507
1508                pars [0] = new Parameter ((Expression) $5, (string) $6, Parameter.Modifier.NONE, null);
1509                pars [1] = new Parameter ((Expression) $8, (string) $9, Parameter.Modifier.NONE, null);
1510
1511                current_local_parameters = new Parameters (pars, null, lexer.Location);
1512
1513                $$ = new OperatorDeclaration ((Operator.OpType) $3, (Expression) $1,
1514                                              (Expression) $5, (string) $6,
1515                                              (Expression) $8, (string) $9, lexer.Location);
1516         }
1517         | conversion_operator_declarator
1518         ;
1519
1520 overloadable_operator
1521 // Unary operators:
1522         : BANG   { $$ = Operator.OpType.LogicalNot; }
1523         | TILDE  { $$ = Operator.OpType.OnesComplement; }
1524         | OP_INC { $$ = Operator.OpType.Increment; }
1525         | OP_DEC { $$ = Operator.OpType.Decrement; }
1526         | TRUE   { $$ = Operator.OpType.True; }
1527         | FALSE  { $$ = Operator.OpType.False; }
1528 // Unary and binary:
1529         | PLUS { $$ = Operator.OpType.Addition; }
1530         | MINUS { $$ = Operator.OpType.Subtraction; }
1531 // Binary:
1532         | STAR { $$ = Operator.OpType.Multiply; }
1533         | DIV {  $$ = Operator.OpType.Division; }
1534         | PERCENT { $$ = Operator.OpType.Modulus; }
1535         | BITWISE_AND { $$ = Operator.OpType.BitwiseAnd; }
1536         | BITWISE_OR { $$ = Operator.OpType.BitwiseOr; }
1537         | CARRET { $$ = Operator.OpType.ExclusiveOr; }
1538         | OP_SHIFT_LEFT { $$ = Operator.OpType.LeftShift; }
1539         | OP_SHIFT_RIGHT { $$ = Operator.OpType.RightShift; }
1540         | OP_EQ { $$ = Operator.OpType.Equality; }
1541         | OP_NE { $$ = Operator.OpType.Inequality; }
1542         | OP_GT { $$ = Operator.OpType.GreaterThan; }
1543         | OP_LT { $$ = Operator.OpType.LessThan; }
1544         | OP_GE { $$ = Operator.OpType.GreaterThanOrEqual; }
1545         | OP_LE { $$ = Operator.OpType.LessThanOrEqual; }
1546         ;
1547
1548 conversion_operator_declarator
1549         : IMPLICIT OPERATOR type OPEN_PARENS type IDENTIFIER CLOSE_PARENS
1550           {
1551                 Parameter [] pars = new Parameter [1];
1552
1553                 pars [0] = new Parameter ((Expression) $5, (string) $6, Parameter.Modifier.NONE, null);
1554
1555                 current_local_parameters = new Parameters (pars, null, lexer.Location);
1556
1557                 $$ = new OperatorDeclaration (Operator.OpType.Implicit, (Expression) $3, (Expression) $5, (string) $6,
1558                                               null, null, lexer.Location);
1559           }
1560         | EXPLICIT OPERATOR type OPEN_PARENS type IDENTIFIER CLOSE_PARENS
1561           {
1562                 Parameter [] pars = new Parameter [1];
1563
1564                 pars [0] = new Parameter ((Expression) $5, (string) $6, Parameter.Modifier.NONE, null);
1565
1566                 current_local_parameters = new Parameters (pars, null, lexer.Location);
1567
1568                 $$ = new OperatorDeclaration (Operator.OpType.Explicit, (Expression) $3, (Expression) $5, (string) $6,
1569                                               null, null, lexer.Location);
1570           }
1571         | IMPLICIT error
1572           {
1573                 syntax_error (lexer.Location, "'operator' expected");
1574           }
1575         | EXPLICIT error
1576           {
1577                 syntax_error (lexer.Location, "'operator' expected");
1578           }
1579         ;
1580
1581 constructor_declaration
1582         : opt_attributes
1583           opt_modifiers
1584           constructor_declarator
1585           constructor_body
1586           {
1587                 Constructor c = (Constructor) $3;
1588                 c.Block = (Block) $4;
1589                 c.OptAttributes = (Attributes) $1;
1590                 c.ModFlags = (int) $2;
1591
1592                 if (c.Name == current_container.Basename){
1593                         if ((c.ModFlags & Modifiers.STATIC) != 0){
1594                                 if ((c.ModFlags & Modifiers.Accessibility) != 0){
1595                                         Report.Error (
1596                                                 515, c.Location, String.Format (
1597                                                 "`{0}.{1}': static constructor can not have access modifiers",
1598                                                 c.Name, current_container.Name));
1599                                 }
1600
1601                                 c.ModFlags = Modifiers.Check (Constructor.AllowedModifiers, (int) $2, Modifiers.PRIVATE, c.Location);
1602
1603                                 if (c.Initializer != null){
1604                                         Report.Error (
1605                                                 514, c.Location,
1606                                                 "Static constructors can not have an explicit this or base " +
1607                                                 "constructor invocations");
1608                                 }
1609
1610                                 if (!c.Parameters.Empty){
1611                                         Report.Error (
1612                                                 132, c.Location, "Static constructors should not have parameters");
1613                                 }
1614                         } else {
1615                                 c.ModFlags = Modifiers.Check (Constructor.AllowedModifiers, (int) $2, Modifiers.PRIVATE, c.Location);
1616                         }
1617                 } else {
1618                         // We let another layer check the validity of the constructor.
1619                         Console.WriteLine ("{0} and {1}", c.Name, current_container.Basename);
1620                 }
1621
1622                 CheckDef (current_container.AddConstructor (c), c.Name, c.Location);
1623
1624                 current_local_parameters = null;
1625           }
1626         ;
1627
1628 constructor_declarator
1629         : IDENTIFIER
1630           OPEN_PARENS opt_formal_parameter_list CLOSE_PARENS
1631           {
1632                 oob_stack.Push (lexer.Location);
1633
1634                 current_local_parameters = (Parameters) $3;
1635           }
1636           opt_constructor_initializer
1637           {
1638                 Location l = (Location) oob_stack.Pop ();
1639                 $$ = new Constructor (current_container, (string) $1, 0, (Parameters) $3,
1640                                       (ConstructorInitializer) $6, l);
1641           }
1642         ;
1643
1644 constructor_body
1645         : block
1646         | SEMICOLON             { $$ = null; }
1647         ;
1648
1649 opt_constructor_initializer
1650         : /* empty */                   { $$ = null; }
1651         | constructor_initializer
1652         ;
1653
1654 constructor_initializer
1655         : COLON BASE OPEN_PARENS opt_argument_list CLOSE_PARENS
1656           {
1657                 $$ = new ConstructorBaseInitializer ((ArrayList) $4, current_local_parameters, lexer.Location);
1658           }
1659         | COLON THIS OPEN_PARENS opt_argument_list CLOSE_PARENS
1660           {
1661                 $$ = new ConstructorThisInitializer ((ArrayList) $4, current_local_parameters, lexer.Location);
1662           }
1663         | COLON error {
1664                 Report.Error (1018, lexer.Location, "Keyword this or base expected");
1665                 $$ = null;
1666           }
1667         ;
1668
1669 opt_finalizer
1670         : /* EMPTY */           { $$ = 0; }
1671         | UNSAFE                { $$ = Modifiers.UNSAFE; }
1672         | EXTERN                { $$ = Modifiers.EXTERN; }
1673         ;
1674
1675 destructor_declaration
1676         : opt_attributes opt_finalizer TILDE IDENTIFIER OPEN_PARENS CLOSE_PARENS block
1677           {
1678                 if ((string) $4 != current_container.Basename){
1679                         Report.Error (574, lexer.Location, "Name of destructor must match name of class");
1680                 } else if (!(current_container is Class)){
1681                         Report.Error (575, lexer.Location, "Destructors are only allowed in class types");
1682                 } else {
1683                         Location l = lexer.Location;
1684
1685                         int m = (int) $2;
1686                         if (!RootContext.StdLib && current_container.Name == "System.Object")
1687                                 m |= Modifiers.PROTECTED | Modifiers.VIRTUAL;
1688                         else
1689                                 m |= Modifiers.PROTECTED | Modifiers.OVERRIDE;
1690
1691                         if ((m & Modifiers.UNSAFE) != 0){
1692                                 if (!RootContext.Unsafe){
1693                                         Report.Error (227, l,
1694                                               "Unsafe code requires the --unsafe command " +
1695                                               "line option to be specified");
1696                                 }
1697                         }
1698
1699                         Method d = new Destructor (
1700                                 current_container, TypeManager.system_void_expr, m, "Finalize",
1701                                 new Parameters (null, null, l), (Attributes) $1, l);
1702
1703                         d.Block = (Block) $7;
1704                         CheckDef (current_container.AddMethod (d), d.Name, d.Location);
1705                 }
1706           }
1707         ;
1708
1709 event_declaration
1710         : opt_attributes
1711           opt_modifiers
1712           EVENT type variable_declarators SEMICOLON
1713           {
1714                 foreach (VariableDeclaration var in (ArrayList) $5) {
1715
1716                         Event e = new Event ((Expression) $4, var.identifier,
1717                                              var.expression_or_array_initializer,
1718                                              (int) $2, null, null, (Attributes) $1, lexer.Location);
1719
1720                         CheckDef (current_container.AddEvent (e), e.Name, e.Location);
1721
1722                 }
1723           }
1724         | opt_attributes
1725           opt_modifiers
1726           EVENT type member_name
1727           OPEN_BRACE
1728           {
1729                 implicit_value_parameter_type = (Expression) $4;
1730                 lexer.EventParsing = true;
1731                 oob_stack.Push (lexer.Location);
1732           }
1733           event_accessor_declarations
1734           {
1735                 lexer.EventParsing = false;
1736           }
1737           CLOSE_BRACE
1738           {
1739                 Location loc = (Location) oob_stack.Pop ();
1740
1741                 if ($8 == null){
1742                         Report.Error (65, lexer.Location, "Event must have both add and remove accesors");
1743                         $$ = null;
1744                 } else {
1745                 Pair pair = (Pair) $8;
1746                 Accessor add_accessor = null;
1747                 Accessor rem_accessor = null;
1748
1749                 if (pair.First != null)
1750                         add_accessor = (Accessor) pair.First;
1751                 if (pair.Second != null)
1752                         rem_accessor = (Accessor) pair.Second;
1753
1754                 Event e = new Event ((Expression) $4, (string) $5, null, (int) $2, add_accessor, rem_accessor,
1755                                      (Attributes) $1, loc);
1756
1757                 CheckDef (current_container.AddEvent (e), e.Name, loc);
1758                 implicit_value_parameter_type = null;
1759           }
1760           }
1761         ;
1762
1763 event_accessor_declarations
1764         : add_accessor_declaration remove_accessor_declaration
1765         {
1766                 $$ = new Pair ($1, $2);
1767         }
1768         | remove_accessor_declaration add_accessor_declaration
1769         {
1770                 $$ = new Pair ($2, $1);
1771         }
1772         | add_accessor_declaration  { $$ = null; }
1773         | remove_accessor_declaration { $$ = null; }
1774         ;
1775
1776 add_accessor_declaration
1777         : opt_attributes ADD
1778           {
1779                 Parameter [] args = new Parameter [1];
1780                 Parameter implicit_value_parameter = new Parameter (
1781                         implicit_value_parameter_type, "value",
1782                         Parameter.Modifier.NONE, null);
1783
1784                 args [0] = implicit_value_parameter;
1785
1786                 current_local_parameters = new Parameters (args, null, lexer.Location);
1787                 lexer.EventParsing = false;
1788           }
1789           block
1790           {
1791                 $$ = new Accessor ((Block) $4, (Attributes) $1);
1792                 lexer.EventParsing = true;
1793           }
1794         | opt_attributes ADD error {
1795                 Report.Error (73, lexer.Location, "Add or remove accessor must have a body");
1796                 $$ = null;
1797           }
1798         ;
1799
1800 remove_accessor_declaration
1801         : opt_attributes REMOVE
1802           {
1803                 Parameter [] args = new Parameter [1];
1804                 Parameter implicit_value_parameter = new Parameter (
1805                         implicit_value_parameter_type, "value",
1806                         Parameter.Modifier.NONE, null);
1807
1808                 args [0] = implicit_value_parameter;
1809
1810                 current_local_parameters = new Parameters (args, null, lexer.Location);
1811                 lexer.EventParsing = false;
1812           }
1813           block
1814           {
1815                 $$ = new Accessor ((Block) $4, (Attributes) $1);
1816                 lexer.EventParsing = true;
1817           }
1818         | opt_attributes REMOVE error {
1819                 Report.Error (73, lexer.Location, "Add or remove accessor must have a body");
1820                 $$ = null;
1821           }
1822         ;
1823
1824 indexer_declaration
1825         : opt_attributes opt_modifiers indexer_declarator
1826           OPEN_BRACE
1827           {
1828                 IndexerDeclaration decl = (IndexerDeclaration) $3;
1829
1830                 implicit_value_parameter_type = decl.type;
1831
1832                 lexer.PropertyParsing = true;
1833                 parsing_indexer  = true;
1834
1835                 indexer_parameters = decl.param_list;
1836                 oob_stack.Push (lexer.Location);
1837           }
1838           accessor_declarations
1839           {
1840                   lexer.PropertyParsing = false;
1841                   parsing_indexer  = false;
1842           }
1843           CLOSE_BRACE
1844           {
1845                 // The signature is computed from the signature of the indexer.  Look
1846                 // at section 3.6 on the spec
1847                 Location loc = (Location) oob_stack.Pop ();
1848                 Indexer indexer;
1849                 IndexerDeclaration decl = (IndexerDeclaration) $3;
1850                 Pair pair = (Pair) $6;
1851                 Accessor get_block = (Accessor) pair.First;
1852                 Accessor set_block = (Accessor) pair.Second;
1853
1854                 indexer = new Indexer (current_container, decl.type, decl.interface_type, (int) $2,
1855                                        decl.param_list, get_block, set_block, (Attributes) $1, loc);
1856
1857                 // Note that there is no equivalent of CheckDef for this case
1858                 // We shall handle this in semantic analysis
1859
1860                 current_container.AddIndexer (indexer);
1861
1862                 current_local_parameters = null;
1863                 implicit_value_parameter_type = null;
1864                 indexer_parameters = null;
1865           }
1866         ;
1867
1868 indexer_declarator
1869         : type THIS OPEN_BRACKET opt_formal_parameter_list CLOSE_BRACKET
1870           {
1871                 Parameters pars = (Parameters) $4;
1872
1873                 if (pars.FixedParameters == null && pars.ArrayParameter == null){
1874                         Report.Error (1551, lexer.Location, "Indexers must have at least one parameter");
1875                 }
1876
1877                 $$ = new IndexerDeclaration ((Expression) $1, null, pars);
1878           }
1879         | type member_name DOT THIS OPEN_BRACKET opt_formal_parameter_list CLOSE_BRACKET
1880           {
1881                 Parameters pars = (Parameters) $6;
1882
1883                 if (pars.FixedParameters == null && pars.ArrayParameter == null){
1884                         Report.Error (1551, lexer.Location, "Indexers must have at least one parameter");
1885                 }
1886                 $$ = new IndexerDeclaration ((Expression) $1, $2.ToString (), pars);
1887           }
1888         ;
1889
1890 enum_declaration
1891         : opt_attributes
1892           opt_modifiers
1893           ENUM IDENTIFIER
1894           opt_enum_base
1895           enum_body
1896           opt_semicolon
1897           {
1898                 Location enum_location = lexer.Location;
1899
1900                 string full_name = MakeName ((string) $4);
1901                 Enum e = new Enum (current_namespace, current_container, (Expression) $5, (int) $2,
1902                                    full_name, (Attributes) $1, enum_location);
1903
1904                 foreach (VariableDeclaration ev in (ArrayList) $6) {
1905                         Location loc = (Location) ev.Location;
1906
1907                         CheckDef (e.AddEnumMember (ev.identifier,
1908                                                    (Expression) ev.expression_or_array_initializer,
1909                                                    loc, ev.OptAttributes),
1910                                   ev.identifier, loc);
1911                 }
1912
1913                 CheckDef (current_container.AddEnum (e), full_name, enum_location);
1914                 RootContext.Tree.RecordDecl (full_name, e);
1915
1916           }
1917         ;
1918
1919 opt_enum_base
1920         : /* empty */           { $$ = TypeManager.system_int32_expr; }
1921         | COLON type            { $$ = $2;   }
1922         ;
1923
1924 enum_body
1925         : OPEN_BRACE opt_enum_member_declarations CLOSE_BRACE
1926           {
1927                 $$ = $2;
1928           }
1929         ;
1930
1931 opt_enum_member_declarations
1932         : /* empty */                   { $$ = new ArrayList (4); }
1933         | enum_member_declarations opt_comma { $$ = $1; }
1934         ;
1935
1936 enum_member_declarations
1937         : enum_member_declaration
1938           {
1939                 ArrayList l = new ArrayList (4);
1940
1941                 l.Add ($1);
1942                 $$ = l;
1943           }
1944         | enum_member_declarations COMMA enum_member_declaration
1945           {
1946                 ArrayList l = (ArrayList) $1;
1947
1948                 l.Add ($3);
1949
1950                 $$ = l;
1951           }
1952         ;
1953
1954 enum_member_declaration
1955         : opt_attributes IDENTIFIER
1956           {
1957                 $$ = new VariableDeclaration ((string) $2, null, lexer.Location, (Attributes) $1);
1958           }
1959         | opt_attributes IDENTIFIER
1960           {
1961                   $$ = lexer.Location;
1962           }
1963           ASSIGN expression
1964           {
1965                 $$ = new VariableDeclaration ((string) $2, $5, lexer.Location, (Attributes) $1);
1966           }
1967         ;
1968
1969 delegate_declaration
1970         : opt_attributes
1971           opt_modifiers
1972           DELEGATE type
1973           IDENTIFIER OPEN_PARENS
1974           opt_formal_parameter_list
1975           CLOSE_PARENS
1976           SEMICOLON
1977           {
1978                 Location l = lexer.Location;
1979                 Delegate del = new Delegate (current_namespace, current_container, (Expression) $4,
1980                                              (int) $2, MakeName ((string) $5), (Parameters) $7,
1981                                              (Attributes) $1, l);
1982
1983                 CheckDef (current_container.AddDelegate (del), del.Name, l);
1984           }
1985         | opt_attributes
1986           opt_modifiers
1987           DELEGATE VOID
1988           IDENTIFIER OPEN_PARENS
1989           opt_formal_parameter_list
1990           CLOSE_PARENS
1991           SEMICOLON
1992           {
1993                 Location l = lexer.Location;
1994                 Delegate del = new Delegate (
1995                         current_namespace, current_container,
1996                         TypeManager.system_void_expr, (int) $2, MakeName ((string) $5),
1997                         (Parameters) $7, (Attributes) $1, l);
1998
1999                 CheckDef (current_container.AddDelegate (del), del.Name, l);
2000           }
2001         ;
2002
2003 type_name
2004         : namespace_or_type_name
2005         ;
2006
2007 namespace_or_type_name
2008         : IDENTIFIER opt_type_argument_list {
2009                 if ($2 == null)
2010                         $$ = new SimpleName ((string) $1, lexer.Location);
2011                 else
2012                         $$ = new ConstructedType ((string) $1, (TypeArguments) $2, lexer.Location);
2013           }
2014         | namespace_or_type_name DOT IDENTIFIER opt_type_argument_list
2015           {
2016                 Expression right;
2017
2018                 //
2019                 // Third argument will become an Expression, when we have sorted out
2020                 // the issues with SimpleName first
2021                 //
2022
2023                 if ($4 == null)
2024                         $$ = new MemberAccess ((Expression) $1, (string) $3, lexer.Location);
2025                 else
2026                         $$ = new GenericMemberAccess ((Expression) $1, (string) $3,
2027                                                       (TypeArguments) $4, lexer.Location);
2028           }
2029         | namespace_or_type_name DOT DEFAULT
2030           {
2031                 $$ = new DefaultValueExpression ((Expression) $1, lexer.Location);
2032           }
2033         ;
2034
2035 //
2036 // TODO:
2037 //   Figure out what to do with the list
2038 //
2039 opt_type_argument_list
2040         : /* empty */                { $$ = null; }
2041         | OP_GENERICS_LT type_arguments OP_GENERICS_GT
2042           {
2043                 $$ = $2;
2044           }
2045         ;
2046
2047 type_arguments
2048         : type {
2049                 TypeArguments type_args = new TypeArguments ();
2050                 type_args.Add ((Expression) $1);
2051                 $$ = type_args;
2052           }
2053         | type_arguments COMMA type {
2054                 TypeArguments type_args = (TypeArguments) $1;
2055                 type_args.Add ((Expression) $3);
2056                 $$ = type_args;
2057           }
2058         ;
2059
2060 /*
2061  * Before you think of adding a return_type, notice that we have been
2062  * using two rules in the places where it matters (one rule using type
2063  * and another identical one that uses VOID as the return type).  This
2064  * gets rid of a shift/reduce couple
2065  */
2066 type
2067         : type_name {   /* class_type */
2068           }
2069         | builtin_types
2070         | array_type
2071         | pointer_type
2072         ;
2073
2074
2075 pointer_type
2076         : type STAR
2077           {
2078                 //
2079                 // Note that here only unmanaged types are allowed but we
2080                 // can't perform checks during this phase - we do it during
2081                 // semantic analysis.
2082                 //
2083                 $$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
2084           }
2085         | VOID STAR
2086           {
2087                 $$ = new ComposedCast (TypeManager.system_void_expr, "*", lexer.Location);
2088           }
2089         ;
2090
2091 non_expression_type
2092         : builtin_types
2093         | non_expression_type rank_specifier
2094           {
2095                 $$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
2096           }
2097         | non_expression_type STAR
2098           {
2099                 $$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
2100           }
2101         | expression rank_specifiers
2102           {
2103                 $$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
2104           }
2105         | expression STAR
2106           {
2107                 $$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
2108           }
2109
2110         //
2111         // We need this because the parser will happily go and reduce IDENTIFIER STAR
2112         // through this different path
2113         //
2114         | multiplicative_expression STAR
2115           {
2116                 $$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
2117           }
2118         ;
2119
2120 type_list
2121         : type
2122           {
2123                 ArrayList types = new ArrayList (4);
2124
2125                 types.Add ($1);
2126                 $$ = types;
2127           }
2128         | type_list COMMA type
2129           {
2130                 ArrayList types = (ArrayList) $1;
2131
2132                 types.Add ($3);
2133                 $$ = types;
2134           }
2135         ;
2136
2137 /*
2138  * replaces all the productions for isolating the various
2139  * simple types, but we need this to reuse it easily in local_variable_type
2140  */
2141 builtin_types
2142         : OBJECT        { $$ = TypeManager.system_object_expr; }
2143         | STRING        { $$ = TypeManager.system_string_expr; }
2144         | BOOL          { $$ = TypeManager.system_boolean_expr; }
2145         | DECIMAL       { $$ = TypeManager.system_decimal_expr; }
2146         | FLOAT         { $$ = TypeManager.system_single_expr; }
2147         | DOUBLE        { $$ = TypeManager.system_double_expr; }
2148         | integral_type
2149         ;
2150
2151 integral_type
2152         : SBYTE         { $$ = TypeManager.system_sbyte_expr; }
2153         | BYTE          { $$ = TypeManager.system_byte_expr; }
2154         | SHORT         { $$ = TypeManager.system_int16_expr; }
2155         | USHORT        { $$ = TypeManager.system_uint16_expr; }
2156         | INT           { $$ = TypeManager.system_int32_expr; }
2157         | UINT          { $$ = TypeManager.system_uint32_expr; }
2158         | LONG          { $$ = TypeManager.system_int64_expr; }
2159         | ULONG         { $$ = TypeManager.system_uint64_expr; }
2160         | CHAR          { $$ = TypeManager.system_char_expr; }
2161         | VOID          { $$ = TypeManager.system_void_expr; }
2162         ;
2163
2164 interface_type
2165         : type_name
2166         ;
2167
2168 array_type
2169         : type rank_specifiers
2170           {
2171                 $$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
2172           }
2173         ;
2174
2175 //
2176 // Expressions, section 7.5
2177 //
2178 primary_expression
2179         : literal
2180           {
2181                 // 7.5.1: Literals
2182           }
2183
2184         | type_name
2185           {
2186                 $$ = $1;
2187           }
2188         | parenthesized_expression
2189         | default_value_expression
2190         | member_access
2191         | invocation_expression
2192         | element_access
2193         | this_access
2194         | base_access
2195         | post_increment_expression
2196         | post_decrement_expression
2197         | new_expression
2198         | typeof_expression
2199         | sizeof_expression
2200         | checked_expression
2201         | unchecked_expression
2202         | pointer_member_access
2203         | anonymous_method_expression
2204         ;
2205
2206 literal
2207         : boolean_literal
2208         | integer_literal
2209         | real_literal
2210         | LITERAL_CHARACTER     { $$ = new CharLiteral ((char) lexer.Value); }
2211         | LITERAL_STRING        { $$ = new StringLiteral ((string) lexer.Value); }
2212         | NULL                  { $$ = NullLiteral.Null; }
2213         ;
2214
2215 real_literal
2216         : LITERAL_FLOAT         { $$ = new FloatLiteral ((float) lexer.Value); }
2217         | LITERAL_DOUBLE        { $$ = new DoubleLiteral ((double) lexer.Value); }
2218         | LITERAL_DECIMAL       { $$ = new DecimalLiteral ((decimal) lexer.Value); }
2219         ;
2220
2221 integer_literal
2222         : LITERAL_INTEGER       {
2223                 object v = lexer.Value;
2224
2225                 if (v is int){
2226                         int i = (int) v;
2227
2228                         if (i == 0)
2229                                 $$ = IntLiteral.Zero;
2230                         else if (i == 1)
2231                                 $$ = IntLiteral.One;
2232                         else
2233                                 $$ = new IntLiteral (i);
2234                 } else if (v is uint)
2235                         $$ = new UIntLiteral ((UInt32) v);
2236                 else if (v is long)
2237                         $$ = new LongLiteral ((Int64) v);
2238                 else if (v is ulong)
2239                         $$ = new ULongLiteral ((UInt64) v);
2240                 else
2241                         Console.WriteLine ("OOPS.  Unexpected result from scanner");
2242           }
2243         ;
2244
2245 boolean_literal
2246         : TRUE                  { $$ = new BoolLiteral (true); }
2247         | FALSE                 { $$ = new BoolLiteral (false); }
2248         ;
2249
2250 parenthesized_expression_0
2251         : OPEN_PARENS expression CLOSE_PARENS
2252           {
2253                 $$ = $2;
2254                 lexer.Deambiguate_CloseParens ();
2255                 // After this, the next token returned is one of
2256                 // CLOSE_PARENS_CAST, CLOSE_PARENS_NO_CAST, CLOSE_PARENS_OPEN_PARENS
2257                 // or CLOSE_PARENS_MINUS.
2258           }
2259         ;
2260
2261 parenthesized_expression
2262         : parenthesized_expression_0 CLOSE_PARENS_NO_CAST
2263           {
2264                 $$ = $1;
2265           }
2266         | parenthesized_expression_0 CLOSE_PARENS_MINUS
2267           {
2268                 // If a parenthesized expression is followed by a minus, we need to wrap
2269                 // the expression inside a ParenthesizedExpression for the CS0075 check
2270                 // in Binary.DoResolve().
2271                 $$ = new ParenthesizedExpression ((Expression) $1, lexer.Location);
2272           }
2273         ;;
2274
2275 member_access
2276         : primary_expression DOT IDENTIFIER
2277           {
2278                 $$ = new MemberAccess ((Expression) $1, (string) $3, lexer.Location);
2279           }
2280         | predefined_type DOT IDENTIFIER
2281           {
2282                 $$ = new MemberAccess ((Expression) $1, (string) $3, lexer.Location);
2283           }
2284         ;
2285
2286 predefined_type
2287         : builtin_types
2288         ;
2289
2290 invocation_expression
2291         : primary_expression OPEN_PARENS opt_argument_list CLOSE_PARENS
2292           {
2293                 if ($1 == null) {
2294                         Location l = lexer.Location;
2295                         Report.Error (1, l, "Parse error");
2296                 }
2297                 $$ = new Invocation ((Expression) $1, (ArrayList) $3, lexer.Location);
2298           }
2299         | parenthesized_expression_0 CLOSE_PARENS_OPEN_PARENS OPEN_PARENS CLOSE_PARENS
2300           {
2301                 $$ = new Invocation ((Expression) $1, new ArrayList (), lexer.Location);
2302           }
2303         | parenthesized_expression_0 CLOSE_PARENS_OPEN_PARENS primary_expression
2304           {
2305                 $$ = new InvocationOrCast ((Expression) $1, (Expression) $3, lexer.Location);
2306           }
2307         ;
2308
2309 opt_argument_list
2310         : /* empty */           { $$ = null; }
2311         | argument_list
2312         ;
2313
2314 argument_list
2315         : argument
2316           {
2317                 ArrayList list = new ArrayList (4);
2318                 list.Add ($1);
2319                 $$ = list;
2320           }
2321         | argument_list COMMA argument
2322           {
2323                 ArrayList list = (ArrayList) $1;
2324                 list.Add ($3);
2325                 $$ = list;
2326           }
2327         | argument_list error {
2328                 CheckToken (1026, yyToken, ", or ) expected");
2329           }
2330         ;
2331
2332 argument
2333         : expression
2334           {
2335                 $$ = new Argument ((Expression) $1, Argument.AType.Expression);
2336           }
2337         | REF variable_reference
2338           {
2339                 $$ = new Argument ((Expression) $2, Argument.AType.Ref);
2340           }
2341         | OUT variable_reference
2342           {
2343                 $$ = new Argument ((Expression) $2, Argument.AType.Out);
2344           }
2345         ;
2346
2347 variable_reference
2348         : expression { note ("section 5.4"); $$ = $1; }
2349         ;
2350
2351 element_access
2352         : primary_expression OPEN_BRACKET expression_list CLOSE_BRACKET
2353           {
2354                 $$ = new ElementAccess ((Expression) $1, (ArrayList) $3, lexer.Location);
2355           }
2356         | primary_expression rank_specifiers
2357           {
2358                 // So the super-trick is that primary_expression
2359                 // can only be either a SimpleName or a MemberAccess.
2360                 // The MemberAccess case arises when you have a fully qualified type-name like :
2361                 // Foo.Bar.Blah i;
2362                 // SimpleName is when you have
2363                 // Blah i;
2364
2365                 Expression expr = (Expression) $1;
2366                 if (expr is ComposedCast){
2367                         $$ = new ComposedCast (expr, (string) $2, lexer.Location);
2368                 } else if (!(expr is SimpleName || expr is MemberAccess || expr is ConstructedType)){
2369                         Error_ExpectingTypeName (lexer.Location, expr);
2370                         $$ = TypeManager.system_object_expr;
2371                 } else {
2372                         //
2373                         // So we extract the string corresponding to the SimpleName
2374                         // or MemberAccess
2375                         //
2376                         $$ = new ComposedCast (expr, (string) $2, lexer.Location);
2377                 }
2378           }
2379         ;
2380
2381 expression_list
2382         : expression
2383           {
2384                 ArrayList list = new ArrayList (4);
2385                 list.Add ($1);
2386                 $$ = list;
2387           }
2388         | expression_list COMMA expression
2389           {
2390                 ArrayList list = (ArrayList) $1;
2391                 list.Add ($3);
2392                 $$ = list;
2393           }
2394         ;
2395
2396 this_access
2397         : THIS
2398           {
2399                 $$ = new This (current_block, lexer.Location);
2400           }
2401         ;
2402
2403 base_access
2404         : BASE DOT IDENTIFIER
2405           {
2406                 $$ = new BaseAccess ((string) $3, lexer.Location);
2407           }
2408         | BASE OPEN_BRACKET expression_list CLOSE_BRACKET
2409           {
2410                 $$ = new BaseIndexerAccess ((ArrayList) $3, lexer.Location);
2411           }
2412         | BASE error {
2413                 Report.Error (175, "Use of keyword `base' is not valid in this context");
2414                 $$ = null;
2415           }
2416         ;
2417
2418 post_increment_expression
2419         : primary_expression OP_INC
2420           {
2421                 $$ = new UnaryMutator (UnaryMutator.Mode.PostIncrement,
2422                                        (Expression) $1, lexer.Location);
2423           }
2424         ;
2425
2426 post_decrement_expression
2427         : primary_expression OP_DEC
2428           {
2429                 $$ = new UnaryMutator (UnaryMutator.Mode.PostDecrement,
2430                                        (Expression) $1, lexer.Location);
2431           }
2432         ;
2433
2434 new_expression
2435         : object_or_delegate_creation_expression
2436         | array_creation_expression
2437         ;
2438
2439 object_or_delegate_creation_expression
2440         : NEW type OPEN_PARENS opt_argument_list CLOSE_PARENS
2441           {
2442                 $$ = new New ((Expression) $2, (ArrayList) $4, lexer.Location);
2443           }
2444         ;
2445
2446 array_creation_expression
2447         : NEW type OPEN_BRACKET expression_list CLOSE_BRACKET
2448           opt_rank_specifier
2449           opt_array_initializer
2450           {
2451                 $$ = new ArrayCreation ((Expression) $2, (ArrayList) $4, (string) $6, (ArrayList) $7, lexer.Location);
2452           }
2453         | NEW type rank_specifiers array_initializer
2454           {
2455                 $$ = new ArrayCreation ((Expression) $2, (string) $3, (ArrayList) $4, lexer.Location);
2456           }
2457         | NEW type error
2458           {
2459                 Report.Error (1526, lexer.Location, "new expression requires () or [] after type");
2460           }
2461         ;
2462
2463 opt_rank_specifier
2464         : /* empty */
2465           {
2466                   $$ = "";
2467           }
2468         | rank_specifiers
2469           {
2470                         $$ = $1;
2471           }
2472         ;
2473
2474 rank_specifiers
2475         : rank_specifier opt_rank_specifier
2476           {
2477                   $$ = (string) $2 + (string) $1;
2478           }
2479         ;
2480
2481 rank_specifier
2482         : OPEN_BRACKET opt_dim_separators CLOSE_BRACKET
2483           {
2484                 $$ = "[" + (string) $2 + "]";
2485           }
2486         ;
2487
2488 opt_dim_separators
2489         : /* empty */
2490           {
2491                 $$ = "";
2492           }
2493         | dim_separators
2494           {
2495                   $$ = $1;
2496           }
2497         ;
2498
2499 dim_separators
2500         : COMMA
2501           {
2502                 $$ = ",";
2503           }
2504         | dim_separators COMMA
2505           {
2506                 $$ = (string) $1 + ",";
2507           }
2508         ;
2509
2510 opt_array_initializer
2511         : /* empty */
2512           {
2513                 $$ = null;
2514           }
2515         | array_initializer
2516           {
2517                 $$ = $1;
2518           }
2519         ;
2520
2521 array_initializer
2522         : OPEN_BRACE CLOSE_BRACE
2523           {
2524                 ArrayList list = new ArrayList (4);
2525                 $$ = list;
2526           }
2527         | OPEN_BRACE variable_initializer_list opt_comma CLOSE_BRACE
2528           {
2529                 $$ = (ArrayList) $2;
2530           }
2531         ;
2532
2533 variable_initializer_list
2534         : variable_initializer
2535           {
2536                 ArrayList list = new ArrayList (4);
2537                 list.Add ($1);
2538                 $$ = list;
2539           }
2540         | variable_initializer_list COMMA variable_initializer
2541           {
2542                 ArrayList list = (ArrayList) $1;
2543                 list.Add ($3);
2544                 $$ = list;
2545           }
2546         ;
2547
2548 typeof_expression
2549         : TYPEOF OPEN_PARENS VOID CLOSE_PARENS
2550           {
2551                 $$ = new TypeOfVoid (lexer.Location);
2552           }
2553         | TYPEOF OPEN_PARENS type CLOSE_PARENS
2554           {
2555                 $$ = new TypeOf ((Expression) $3, lexer.Location);
2556           }
2557         ;
2558
2559 sizeof_expression
2560         : SIZEOF OPEN_PARENS type CLOSE_PARENS {
2561                 $$ = new SizeOf ((Expression) $3, lexer.Location);
2562           }
2563         ;
2564
2565 checked_expression
2566         : CHECKED OPEN_PARENS expression CLOSE_PARENS
2567           {
2568                 $$ = new CheckedExpr ((Expression) $3, lexer.Location);
2569           }
2570         ;
2571
2572 unchecked_expression
2573         : UNCHECKED OPEN_PARENS expression CLOSE_PARENS
2574           {
2575                 $$ = new UnCheckedExpr ((Expression) $3, lexer.Location);
2576           }
2577         ;
2578
2579 pointer_member_access
2580         : primary_expression OP_PTR IDENTIFIER
2581           {
2582                 Expression deref;
2583
2584                 deref = new Unary (Unary.Operator.Indirection, (Expression) $1, lexer.Location);
2585                 $$ = new MemberAccess (deref, (string) $3, lexer.Location);
2586           }
2587         ;
2588
2589 anonymous_method_expression
2590         : DELEGATE opt_anonymous_method_signature {
2591                 oob_stack.Push (current_local_parameters);
2592                 current_local_parameters = (Parameters)$2;
2593                 create_toplevel_block = true;
2594           } block {
2595                 create_toplevel_block = false;
2596                 if (!RootContext.V2){
2597                         Report.Error (-213, lexer.Location, "Anonymous methods are only supported in V2");
2598                         $$ = null;
2599                 } else
2600                         $$ = new AnonymousMethod ((Parameters) $2, (Block) $4, lexer.Location);
2601                 current_local_parameters = (Parameters) oob_stack.Pop ();
2602           }
2603         ;
2604
2605 opt_anonymous_method_signature
2606         : /* empty */                   { $$ = Parameters.EmptyReadOnlyParameters; }
2607         | anonymous_method_signature
2608         ;
2609
2610 anonymous_method_signature
2611         : OPEN_PARENS opt_anonymous_method_parameter_list CLOSE_PARENS
2612           {
2613                 if ($2 == null)
2614                         $$ = Parameters.EmptyReadOnlyParameters;
2615                 else {
2616                         ArrayList par_list = (ArrayList) $2;
2617                         Parameter [] pars = new Parameter [par_list.Count];
2618                         par_list.CopyTo (pars);
2619                         $$ = new Parameters (pars, null, lexer.Location);
2620                 }
2621           }
2622         ;
2623
2624 opt_anonymous_method_parameter_list
2625         : /* empty */   { $$ = null; }
2626         | anonymous_method_parameter_list  { $$ = $1; }
2627         ;
2628
2629 anonymous_method_parameter_list
2630         : anonymous_method_parameter
2631           {
2632                 ArrayList a = new ArrayList (4);
2633                 a.Add ($1);
2634                 $$ = a;
2635           }
2636         | anonymous_method_parameter_list COMMA anonymous_method_parameter
2637           {
2638                 ArrayList a = (ArrayList) $1;
2639                 a.Add ($3);
2640                 $$ = a;
2641           }
2642         ;
2643
2644 anonymous_method_parameter
2645         : opt_parameter_modifier type IDENTIFIER {
2646                 $$ = new Parameter ((Expression) $2, (string) $2, (Parameter.Modifier) $1, null);
2647           }
2648         ;
2649
2650 default_value_expression
2651         : primary_expression DOT DEFAULT
2652           {
2653                 $$ = new DefaultValueExpression ((Expression) $1, lexer.Location);
2654           }
2655         | predefined_type DOT DEFAULT
2656           {
2657                 $$ = new DefaultValueExpression ((Expression) $1, lexer.Location);
2658           }
2659         ;
2660
2661 unary_expression
2662         : primary_expression
2663         | BANG prefixed_unary_expression
2664           {
2665                 $$ = new Unary (Unary.Operator.LogicalNot, (Expression) $2, lexer.Location);
2666           }
2667         | TILDE prefixed_unary_expression
2668           {
2669                 $$ = new Unary (Unary.Operator.OnesComplement, (Expression) $2, lexer.Location);
2670           }
2671         | cast_expression
2672         ;
2673
2674 cast_list
2675         : parenthesized_expression_0 CLOSE_PARENS_CAST unary_expression
2676           {
2677                 $$ = new Cast ((Expression) $1, (Expression) $3, lexer.Location);
2678           }
2679         | parenthesized_expression_0 CLOSE_PARENS_OPEN_PARENS cast_expression
2680           {
2681                 $$ = new Cast ((Expression) $1, (Expression) $3, lexer.Location);
2682           }
2683         ;
2684
2685 cast_expression
2686         : cast_list
2687         | OPEN_PARENS non_expression_type CLOSE_PARENS prefixed_unary_expression
2688           {
2689                 $$ = new Cast ((Expression) $2, (Expression) $4, lexer.Location);
2690           }
2691         ;
2692
2693         //
2694         // The idea to split this out is from Rhys' grammar
2695         // to solve the problem with casts.
2696         //
2697 prefixed_unary_expression
2698         : unary_expression
2699         | PLUS prefixed_unary_expression
2700           {
2701                 $$ = new Unary (Unary.Operator.UnaryPlus, (Expression) $2, lexer.Location);
2702           }
2703         | MINUS prefixed_unary_expression
2704           {
2705                 $$ = new Unary (Unary.Operator.UnaryNegation, (Expression) $2, lexer.Location);
2706           }
2707         | OP_INC prefixed_unary_expression
2708           {
2709                 $$ = new UnaryMutator (UnaryMutator.Mode.PreIncrement,
2710                                        (Expression) $2, lexer.Location);
2711           }
2712         | OP_DEC prefixed_unary_expression
2713           {
2714                 $$ = new UnaryMutator (UnaryMutator.Mode.PreDecrement,
2715                                        (Expression) $2, lexer.Location);
2716           }
2717         | STAR prefixed_unary_expression
2718           {
2719                 $$ = new Unary (Unary.Operator.Indirection, (Expression) $2, lexer.Location);
2720           }
2721         | BITWISE_AND prefixed_unary_expression
2722           {
2723                 $$ = new Unary (Unary.Operator.AddressOf, (Expression) $2, lexer.Location);
2724           }
2725         ;
2726
2727 pre_increment_expression
2728         : OP_INC prefixed_unary_expression
2729           {
2730                 $$ = new UnaryMutator (UnaryMutator.Mode.PreIncrement,
2731                                        (Expression) $2, lexer.Location);
2732           }
2733         ;
2734
2735 pre_decrement_expression
2736         : OP_DEC prefixed_unary_expression
2737           {
2738                 $$ = new UnaryMutator (UnaryMutator.Mode.PreDecrement,
2739                                        (Expression) $2, lexer.Location);
2740           }
2741         ;
2742
2743 multiplicative_expression
2744         : prefixed_unary_expression
2745         | multiplicative_expression STAR prefixed_unary_expression
2746           {
2747                 $$ = new Binary (Binary.Operator.Multiply,
2748                                  (Expression) $1, (Expression) $3, lexer.Location);
2749           }
2750         | multiplicative_expression DIV prefixed_unary_expression
2751           {
2752                 $$ = new Binary (Binary.Operator.Division,
2753                                  (Expression) $1, (Expression) $3, lexer.Location);
2754           }
2755         | multiplicative_expression PERCENT prefixed_unary_expression
2756           {
2757                 $$ = new Binary (Binary.Operator.Modulus,
2758                                  (Expression) $1, (Expression) $3, lexer.Location);
2759           }
2760         ;
2761
2762 additive_expression
2763         : multiplicative_expression
2764         | additive_expression PLUS multiplicative_expression
2765           {
2766                 $$ = new Binary (Binary.Operator.Addition,
2767                                  (Expression) $1, (Expression) $3, lexer.Location);
2768           }
2769         | additive_expression MINUS multiplicative_expression
2770           {
2771                 $$ = new Binary (Binary.Operator.Subtraction,
2772                                  (Expression) $1, (Expression) $3, lexer.Location);
2773           }
2774         ;
2775
2776 shift_expression
2777         : additive_expression
2778         | shift_expression OP_SHIFT_LEFT additive_expression
2779           {
2780                 $$ = new Binary (Binary.Operator.LeftShift,
2781                                  (Expression) $1, (Expression) $3, lexer.Location);
2782           }
2783         | shift_expression OP_SHIFT_RIGHT additive_expression
2784           {
2785                 $$ = new Binary (Binary.Operator.RightShift,
2786                                  (Expression) $1, (Expression) $3, lexer.Location);
2787           }
2788         ;
2789
2790 relational_expression
2791         : shift_expression
2792         | relational_expression OP_LT shift_expression
2793           {
2794                 $$ = new Binary (Binary.Operator.LessThan,
2795                                  (Expression) $1, (Expression) $3, lexer.Location);
2796           }
2797         | relational_expression OP_GT shift_expression
2798           {
2799                 $$ = new Binary (Binary.Operator.GreaterThan,
2800                                  (Expression) $1, (Expression) $3, lexer.Location);
2801           }
2802         | relational_expression OP_LE shift_expression
2803           {
2804                 $$ = new Binary (Binary.Operator.LessThanOrEqual,
2805                                  (Expression) $1, (Expression) $3, lexer.Location);
2806           }
2807         | relational_expression OP_GE shift_expression
2808           {
2809                 $$ = new Binary (Binary.Operator.GreaterThanOrEqual,
2810                                  (Expression) $1, (Expression) $3, lexer.Location);
2811           }
2812         | relational_expression IS type
2813           {
2814                 $$ = new Is ((Expression) $1, (Expression) $3, lexer.Location);
2815           }
2816         | relational_expression AS type
2817           {
2818                 $$ = new As ((Expression) $1, (Expression) $3, lexer.Location);
2819           }
2820         ;
2821
2822 equality_expression
2823         : relational_expression
2824         | equality_expression OP_EQ relational_expression
2825           {
2826                 $$ = new Binary (Binary.Operator.Equality,
2827                                  (Expression) $1, (Expression) $3, lexer.Location);
2828           }
2829         | equality_expression OP_NE relational_expression
2830           {
2831                 $$ = new Binary (Binary.Operator.Inequality,
2832                                  (Expression) $1, (Expression) $3, lexer.Location);
2833           }
2834         ;
2835
2836 and_expression
2837         : equality_expression
2838         | and_expression BITWISE_AND equality_expression
2839           {
2840                 $$ = new Binary (Binary.Operator.BitwiseAnd,
2841                                  (Expression) $1, (Expression) $3, lexer.Location);
2842           }
2843         ;
2844
2845 exclusive_or_expression
2846         : and_expression
2847         | exclusive_or_expression CARRET and_expression
2848           {
2849                 $$ = new Binary (Binary.Operator.ExclusiveOr,
2850                                  (Expression) $1, (Expression) $3, lexer.Location);
2851           }
2852         ;
2853
2854 inclusive_or_expression
2855         : exclusive_or_expression
2856         | inclusive_or_expression BITWISE_OR exclusive_or_expression
2857           {
2858                 $$ = new Binary (Binary.Operator.BitwiseOr,
2859                                  (Expression) $1, (Expression) $3, lexer.Location);
2860           }
2861         ;
2862
2863 conditional_and_expression
2864         : inclusive_or_expression
2865         | conditional_and_expression OP_AND inclusive_or_expression
2866           {
2867                 $$ = new Binary (Binary.Operator.LogicalAnd,
2868                                  (Expression) $1, (Expression) $3, lexer.Location);
2869           }
2870         ;
2871
2872 conditional_or_expression
2873         : conditional_and_expression
2874         | conditional_or_expression OP_OR conditional_and_expression
2875           {
2876                 $$ = new Binary (Binary.Operator.LogicalOr,
2877                                  (Expression) $1, (Expression) $3, lexer.Location);
2878           }
2879         ;
2880
2881 conditional_expression
2882         : conditional_or_expression
2883         | conditional_or_expression INTERR expression COLON expression
2884           {
2885                 $$ = new Conditional ((Expression) $1, (Expression) $3, (Expression) $5, lexer.Location);
2886           }
2887         ;
2888
2889 assignment_expression
2890         : prefixed_unary_expression ASSIGN expression
2891           {
2892                 $$ = new Assign ((Expression) $1, (Expression) $3, lexer.Location);
2893           }
2894         | prefixed_unary_expression OP_MULT_ASSIGN expression
2895           {
2896                 Location l = lexer.Location;
2897
2898                 $$ = new CompoundAssign (
2899                         Binary.Operator.Multiply, (Expression) $1, (Expression) $3, l);
2900           }
2901         | prefixed_unary_expression OP_DIV_ASSIGN expression
2902           {
2903                 Location l = lexer.Location;
2904
2905                 $$ = new CompoundAssign (
2906                         Binary.Operator.Division, (Expression) $1, (Expression) $3, l);
2907           }
2908         | prefixed_unary_expression OP_MOD_ASSIGN expression
2909           {
2910                 Location l = lexer.Location;
2911
2912                 $$ = new CompoundAssign (
2913                         Binary.Operator.Modulus, (Expression) $1, (Expression) $3, l);
2914           }
2915         | prefixed_unary_expression OP_ADD_ASSIGN expression
2916           {
2917                 Location l = lexer.Location;
2918
2919                 $$ = new CompoundAssign (
2920                         Binary.Operator.Addition, (Expression) $1, (Expression) $3, l);
2921           }
2922         | prefixed_unary_expression OP_SUB_ASSIGN expression
2923           {
2924                 Location l = lexer.Location;
2925
2926                 $$ = new CompoundAssign (
2927                         Binary.Operator.Subtraction, (Expression) $1, (Expression) $3, l);
2928           }
2929         | prefixed_unary_expression OP_SHIFT_LEFT_ASSIGN expression
2930           {
2931                 Location l = lexer.Location;
2932
2933                 $$ = new CompoundAssign (
2934                         Binary.Operator.LeftShift, (Expression) $1, (Expression) $3, l);
2935           }
2936         | prefixed_unary_expression OP_SHIFT_RIGHT_ASSIGN expression
2937           {
2938                 Location l = lexer.Location;
2939
2940                 $$ = new CompoundAssign (
2941                         Binary.Operator.RightShift, (Expression) $1, (Expression) $3, l);
2942           }
2943         | prefixed_unary_expression OP_AND_ASSIGN expression
2944           {
2945                 Location l = lexer.Location;
2946
2947                 $$ = new CompoundAssign (
2948                         Binary.Operator.BitwiseAnd, (Expression) $1, (Expression) $3, l);
2949           }
2950         | prefixed_unary_expression OP_OR_ASSIGN expression
2951           {
2952                 Location l = lexer.Location;
2953
2954                 $$ = new CompoundAssign (
2955                         Binary.Operator.BitwiseOr, (Expression) $1, (Expression) $3, l);
2956           }
2957         | prefixed_unary_expression OP_XOR_ASSIGN expression
2958           {
2959                 Location l = lexer.Location;
2960
2961                 $$ = new CompoundAssign (
2962                         Binary.Operator.ExclusiveOr, (Expression) $1, (Expression) $3, l);
2963           }
2964         ;
2965
2966 expression
2967         : conditional_expression
2968         | assignment_expression
2969         ;
2970
2971 constant_expression
2972         : expression
2973         ;
2974
2975 boolean_expression
2976         : expression
2977         ;
2978
2979 //
2980 // 10 classes
2981 //
2982 class_declaration
2983         : opt_attributes
2984           opt_modifiers
2985           CLASS IDENTIFIER
2986           {
2987                 Class new_class;
2988                 string name;
2989
2990                 name = MakeName ((string) $4);
2991
2992                 new_class = new Class (current_namespace, current_container, name, (int) $2,
2993                                        (Attributes) $1, lexer.Location);
2994                 current_container = new_class;
2995                 RootContext.Tree.RecordDecl (name, new_class);
2996
2997                 lexer.ConstraintsParsing = true;
2998           }
2999           opt_type_parameter_list
3000           opt_class_base
3001           opt_type_parameter_constraints_clauses
3002           {
3003                 lexer.ConstraintsParsing = false;
3004           }
3005           class_body
3006           opt_semicolon
3007           {
3008                 Class new_class = (Class) current_container;
3009
3010                 if ($8 != null && $6 == null)
3011                         Report.Error (-200, new_class.Location,
3012                                       "Type parameter constraints only valid if there is a type parameter list");
3013
3014                 if ($6 != null)
3015                         CheckDef (new_class.SetParameterInfo ((ArrayList) $6, (ArrayList) $8), new_class.Name, new_class.Location);
3016                 if ($7 != null) {
3017                         if (new_class.Name == "System.Object") {
3018                                 Report.Error (537, new_class.Location, "The class System.Object cannot have a base class or implement an interface.");
3019                         }
3020
3021                         new_class.Bases = (ArrayList) $7;
3022                 }
3023                 current_container = current_container.Parent;
3024                 CheckDef (current_container.AddClass (new_class), new_class.Name, new_class.Location);
3025
3026                 $$ = new_class;
3027           }
3028         | opt_attributes
3029           opt_modifiers
3030           CLASS IDENTIFIER
3031           {
3032                 lexer.ConstraintsParsing = true;
3033           }
3034           WHERE {
3035                 Report.Error (-200, lexer.Location,
3036                         "Type parameter constraints only valid if there is a type parameter list");
3037                 yyErrorFlag = 0;
3038                 $$ = null;
3039           }
3040         ;
3041
3042 opt_modifiers
3043         : /* empty */           { $$ = (int) 0; }
3044         | modifiers
3045         ;
3046
3047 modifiers
3048         : modifier
3049         | modifiers modifier
3050           {
3051                 int m1 = (int) $1;
3052                 int m2 = (int) $2;
3053
3054                 if ((m1 & m2) != 0) {
3055                         Location l = lexer.Location;
3056                         Report.Error (1004, l, "Duplicate modifier: `" + Modifiers.Name (m2) + "'");
3057                 }
3058                 $$ = (int) (m1 | m2);
3059           }
3060         ;
3061
3062 modifier
3063         : NEW                   { $$ = Modifiers.NEW; }
3064         | PUBLIC                { $$ = Modifiers.PUBLIC; }
3065         | PROTECTED             { $$ = Modifiers.PROTECTED; }
3066         | INTERNAL              { $$ = Modifiers.INTERNAL; }
3067         | PRIVATE               { $$ = Modifiers.PRIVATE; }
3068         | ABSTRACT              { $$ = Modifiers.ABSTRACT; }
3069         | SEALED                { $$ = Modifiers.SEALED; }
3070         | STATIC                { $$ = Modifiers.STATIC; }
3071         | READONLY              { $$ = Modifiers.READONLY; }
3072         | VIRTUAL               { $$ = Modifiers.VIRTUAL; }
3073         | OVERRIDE              { $$ = Modifiers.OVERRIDE; }
3074         | EXTERN                { $$ = Modifiers.EXTERN; }
3075         | VOLATILE              { $$ = Modifiers.VOLATILE; }
3076         | UNSAFE                { $$ = Modifiers.UNSAFE; }
3077         ;
3078
3079 opt_class_base
3080         : /* empty */           { $$ = null; }
3081         | class_base            { $$ = $1;   }
3082         ;
3083
3084 class_base
3085         : COLON type_list { $$ = $2; }
3086         ;
3087
3088 opt_type_parameter_list
3089         : /* empty */           { $$ = null; }
3090         | type_parameter_list   { $$ = $1; }
3091         ;
3092
3093 type_parameter_list
3094         : OP_GENERICS_LT type_parameters OP_GENERICS_GT { $$ = $2; }
3095         ;
3096
3097 type_parameters
3098         : type_parameter {
3099                 //
3100                 // Do some profiling to find the optimal size, for now we
3101                 // assume most people will be generic on one type (saves space
3102                 //
3103                 ArrayList type_parameters = new ArrayList (1);
3104                 type_parameters.Add ($1);
3105                 $$ = type_parameters;
3106           }
3107         | type_parameters COMMA type_parameter {
3108                 ArrayList type_parameters = (ArrayList) $1;
3109
3110                 type_parameters.Add ($3);
3111                 $$ = type_parameters;
3112           }
3113         ;
3114
3115 type_parameter
3116         : IDENTIFIER
3117         ;
3118
3119 opt_type_parameter_constraints_clauses
3120         : /* empty */           { $$ = null; }
3121         | type_parameter_constraints_clauses
3122           { $$ = $1; }
3123         ;
3124
3125 type_parameter_constraints_clauses
3126         : type_parameter_constraints_clause
3127         | type_parameter_constraints_clauses type_parameter_constraints_clause {
3128                 ArrayList constraints = (ArrayList) $1;
3129
3130                 constraints.Add ($2);
3131                 $$ = constraints;
3132           }
3133         ;
3134
3135 type_parameter_constraints_clause
3136         : WHERE type_parameter COLON type_parameter_constraints {
3137                 ArrayList constraints = new ArrayList (1);
3138                 constraints.Add (new Constraints ((string) $2, (ArrayList) $4, lexer.Location));
3139                 $$ = constraints;
3140           }
3141         ;
3142
3143 type_parameter_constraints
3144         : type_parameter_constraint {
3145                 ArrayList constraints = new ArrayList (1);
3146                 constraints.Add ($1);
3147                 $$ = constraints;
3148           }
3149         | type_parameter_constraints COMMA type_parameter_constraint {
3150                 ArrayList constraints = (ArrayList) $1;
3151
3152                 constraints.Add ($3);
3153                 $$ = constraints;
3154           }
3155         ;
3156
3157 type_parameter_constraint
3158         : type
3159         | NEW OPEN_PARENS CLOSE_PARENS {
3160                 $$ = true;
3161           }
3162         ;
3163
3164 //
3165 // Statements (8.2)
3166 //
3167
3168 //
3169 // A block is "contained" on the following places:
3170 //      method_body
3171 //      property_declaration as part of the accessor body (get/set)
3172 //      operator_declaration
3173 //      constructor_declaration
3174 //      destructor_declaration
3175 //      event_declaration as part of add_accessor_declaration or remove_accessor_declaration
3176 //
3177 block
3178         : OPEN_BRACE
3179           {
3180                 if (current_block == null || create_toplevel_block){
3181                         current_block = new ToplevelBlock (current_local_parameters, lexer.Location);
3182                 } else {
3183                 current_block = new Block (current_block, current_local_parameters,
3184                                            lexer.Location, Location.Null);
3185                 }
3186           }
3187           opt_statement_list CLOSE_BRACE
3188           {
3189                 while (current_block.Implicit)
3190                         current_block = current_block.Parent;
3191                 $$ = current_block;
3192                 current_block.SetEndLocation (lexer.Location);
3193                 current_block = current_block.Parent;
3194           }
3195         ;
3196
3197 opt_statement_list
3198         : /* empty */
3199         | statement_list
3200         ;
3201
3202 statement_list
3203         : statement
3204         | statement_list statement
3205         ;
3206
3207 statement
3208         : declaration_statement
3209           {
3210                 if ($1 != null && (Block) $1 != current_block){
3211                         current_block.AddStatement ((Statement) $1);
3212                         current_block = (Block) $1;
3213                 }
3214           }
3215         | embedded_statement
3216           {
3217                 current_block.AddStatement ((Statement) $1);
3218           }
3219         | labeled_statement
3220         ;
3221
3222 embedded_statement
3223         : block
3224         | empty_statement
3225         | expression_statement
3226         | selection_statement
3227         | iteration_statement
3228         | jump_statement
3229         | try_statement
3230         | checked_statement
3231         | unchecked_statement
3232         | lock_statement
3233         | using_statement
3234         | unsafe_statement
3235         | fixed_statement
3236         ;
3237
3238 empty_statement
3239         : SEMICOLON
3240           {
3241                   $$ = EmptyStatement.Value;
3242           }
3243         ;
3244
3245 labeled_statement
3246         : IDENTIFIER COLON
3247           {
3248                 LabeledStatement labeled = new LabeledStatement ((string) $1, lexer.Location);
3249
3250                 if (!current_block.AddLabel ((string) $1, labeled)){
3251                         Location l = lexer.Location;
3252                         Report.Error (140, l, "The label '" + ((string) $1) + "' is a duplicate");
3253                 }
3254                 current_block.AddStatement (labeled);
3255           }
3256           statement
3257         ;
3258
3259 declaration_statement
3260         : local_variable_declaration SEMICOLON
3261           {
3262                 if ($1 != null){
3263                         DictionaryEntry de = (DictionaryEntry) $1;
3264
3265                         $$ = declare_local_variables ((Expression) de.Key, (ArrayList) de.Value, lexer.Location);
3266                 }
3267           }
3268
3269         | local_constant_declaration SEMICOLON
3270           {
3271                 if ($1 != null){
3272                         DictionaryEntry de = (DictionaryEntry) $1;
3273
3274                         $$ = declare_local_constants ((Expression) de.Key, (ArrayList) de.Value);
3275                 }
3276           }
3277         ;
3278
3279 /*
3280  * The following is from Rhys' grammar:
3281  * > Types in local variable declarations must be recognized as
3282  * > expressions to prevent reduce/reduce errors in the grammar.
3283  * > The expressions are converted into types during semantic analysis.
3284  */
3285 local_variable_type
3286         : primary_expression opt_rank_specifier
3287           {
3288                 // FIXME: Do something smart here regarding the composition of the type.
3289
3290                 // Ok, the above "primary_expression" is there to get rid of
3291                 // both reduce/reduce and shift/reduces in the grammar, it should
3292                 // really just be "type_name".  If you use type_name, a reduce/reduce
3293                 // creeps up.  If you use namespace_or_type_name (which is all we need
3294                 // really) two shift/reduces appear.
3295                 //
3296
3297                 // So the super-trick is that primary_expression
3298                 // can only be either a SimpleName or a MemberAccess.
3299                 // The MemberAccess case arises when you have a fully qualified type-name like :
3300                 // Foo.Bar.Blah i;
3301                 // SimpleName is when you have
3302                 // Blah i;
3303
3304                 Expression expr = (Expression) $1;
3305                 if (!(expr is SimpleName || expr is MemberAccess || expr is ComposedCast || expr is ConstructedType)) {
3306                         Error_ExpectingTypeName (lexer.Location, expr);
3307                         $$ = null;
3308                 } else {
3309                         //
3310                         // So we extract the string corresponding to the SimpleName
3311                         // or MemberAccess
3312                         //
3313
3314                         if ((string) $2 == "")
3315                                 $$ = $1;
3316                         else
3317                                 $$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
3318                 }
3319           }
3320         | builtin_types opt_rank_specifier
3321           {
3322                 if ((string) $2 == "")
3323                         $$ = $1;
3324                 else
3325                         $$ = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
3326           }
3327         ;
3328
3329 local_variable_pointer_type
3330         : primary_expression STAR
3331           {
3332                 Expression expr = (Expression) $1;
3333                 Location l = lexer.Location;
3334
3335                 if (!(expr is SimpleName || expr is MemberAccess || expr is ComposedCast || expr is ConstructedType)) {
3336                         Error_ExpectingTypeName (l, expr);
3337
3338                         $$ = null;
3339                 } else
3340                         $$ = new ComposedCast ((Expression) $1, "*", l);
3341           }
3342         | builtin_types STAR
3343           {
3344                 $$ = new ComposedCast ((Expression) $1, "*", lexer.Location);;
3345           }
3346         | VOID STAR
3347           {
3348                 $$ = new ComposedCast (TypeManager.system_void_expr, "*", lexer.Location);;
3349           }
3350         | local_variable_pointer_type STAR
3351           {
3352                 $$ = new ComposedCast ((Expression) $1, "*", lexer.Location);
3353           }
3354         ;
3355
3356 local_variable_declaration
3357         : local_variable_type variable_declarators
3358           {
3359                 if ($1 != null)
3360                         $$ = new DictionaryEntry ($1, $2);
3361                 else
3362                         $$ = null;
3363           }
3364         | local_variable_pointer_type opt_rank_specifier variable_declarators
3365         {
3366                 if ($1 != null){
3367                         Expression t;
3368
3369                         if ((string) $2 == "")
3370                                 t = (Expression) $1;
3371                         else
3372                                 t = new ComposedCast ((Expression) $1, (string) $2, lexer.Location);
3373                         $$ = new DictionaryEntry (t, $3);
3374                 } else
3375                         $$ = null;
3376         }
3377         ;
3378
3379 local_constant_declaration
3380         : CONST local_variable_type constant_declarators
3381           {
3382                 if ($2 != null)
3383                         $$ = new DictionaryEntry ($2, $3);
3384                 else
3385                         $$ = null;
3386           }
3387         ;
3388
3389 expression_statement
3390         : statement_expression SEMICOLON
3391           {
3392                 $$ = $1;
3393           }
3394         ;
3395
3396         //
3397         // We have to do the wrapping here and not in the case above,
3398         // because statement_expression is used for example in for_statement
3399         //
3400 statement_expression
3401         : invocation_expression         { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
3402         | object_creation_expression    { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
3403         | assignment_expression         { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
3404         | post_increment_expression     { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
3405         | post_decrement_expression     { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
3406         | pre_increment_expression      { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
3407         | pre_decrement_expression      { $$ = new StatementExpression ((ExpressionStatement) $1, lexer.Location); }
3408         | error {
3409                 Report.Error (1002, lexer.Location, "Expecting `;'");
3410                 $$ = null;
3411           }
3412         ;
3413
3414 object_creation_expression
3415         : object_or_delegate_creation_expression
3416           { note ("complain if this is a delegate maybe?"); }
3417         ;
3418
3419 selection_statement
3420         : if_statement
3421         | switch_statement
3422         ;
3423
3424 if_statement
3425         : if_statement_open if_statement_rest
3426           {
3427                 $$ = $2;
3428           }
3429         ;
3430
3431 if_statement_open
3432         : IF OPEN_PARENS
3433           {
3434                 oob_stack.Push (lexer.Location);
3435           }
3436         ;
3437
3438 if_statement_rest
3439         : boolean_expression CLOSE_PARENS
3440           embedded_statement
3441           {
3442                 Location l = (Location) oob_stack.Pop ();
3443
3444                 $$ = new If ((Expression) $1, (Statement) $3, l);
3445
3446                 if (RootContext.WarningLevel >= 3){
3447                         if ($3 == EmptyStatement.Value)
3448                                 Report.Warning (642, lexer.Location, "Possibly mistaken empty statement");
3449                 }
3450
3451           }
3452         | boolean_expression CLOSE_PARENS
3453           embedded_statement ELSE embedded_statement
3454           {
3455                 Location l = (Location) oob_stack.Pop ();
3456
3457                 $$ = new If ((Expression) $1, (Statement) $3, (Statement) $5, l);
3458           }
3459         ;
3460
3461 switch_statement
3462         : SWITCH OPEN_PARENS
3463           {
3464                 oob_stack.Push (lexer.Location);
3465                 switch_stack.Push (current_block);
3466           }
3467           expression CLOSE_PARENS
3468           switch_block
3469           {
3470                 $$ = new Switch ((Expression) $4, (ArrayList) $6, (Location) oob_stack.Pop ());
3471                 current_block = (Block) switch_stack.Pop ();
3472           }
3473         ;
3474
3475 switch_block
3476         : OPEN_BRACE
3477           opt_switch_sections
3478           CLOSE_BRACE
3479           {
3480                 $$ = $2;
3481           }
3482         ;
3483
3484 opt_switch_sections
3485         : /* empty */
3486           {
3487                 Report.Error (1522, lexer.Location, "Empty switch block");
3488           }
3489         | switch_sections
3490         ;
3491
3492 switch_sections
3493         : switch_section
3494           {
3495                 ArrayList sections = new ArrayList (4);
3496
3497                 sections.Add ($1);
3498                 $$ = sections;
3499           }
3500         | switch_sections switch_section
3501           {
3502                 ArrayList sections = (ArrayList) $1;
3503
3504                 sections.Add ($2);
3505                 $$ = sections;
3506           }
3507         ;
3508
3509 switch_section
3510         : switch_labels
3511           {
3512                 current_block = current_block.CreateSwitchBlock (lexer.Location);
3513           }
3514           statement_list
3515           {
3516                 Block topmost = current_block;
3517
3518                 while (topmost.Implicit)
3519                         topmost = topmost.Parent;
3520                 $$ = new SwitchSection ((ArrayList) $1, topmost);
3521           }
3522         ;
3523
3524 switch_labels
3525         : switch_label
3526           {
3527                 ArrayList labels = new ArrayList (4);
3528
3529                 labels.Add ($1);
3530                 $$ = labels;
3531           }
3532         | switch_labels switch_label
3533           {
3534                 ArrayList labels = (ArrayList) ($1);
3535                 labels.Add ($2);
3536
3537                 $$ = labels;
3538           }
3539         ;
3540
3541 switch_label
3542         : CASE constant_expression COLON        { $$ = new SwitchLabel ((Expression) $2, lexer.Location); }
3543         | DEFAULT COLON                         { $$ = new SwitchLabel (null, lexer.Location); }
3544         | error {
3545                 Report.Error (
3546                         1523, lexer.Location,
3547                         "The keyword case or default must precede code in switch block");
3548           }
3549         ;
3550
3551 iteration_statement
3552         : while_statement
3553         | do_statement
3554         | for_statement
3555         | foreach_statement
3556         ;
3557
3558 while_statement
3559         : WHILE OPEN_PARENS
3560         {
3561                 oob_stack.Push (lexer.Location);
3562         }
3563         boolean_expression CLOSE_PARENS embedded_statement
3564         {
3565                 Location l = (Location) oob_stack.Pop ();
3566                 $$ = new While ((Expression) $4, (Statement) $6, l);
3567
3568                 if (RootContext.WarningLevel >= 3){
3569                         if ($6 == EmptyStatement.Value)
3570                                 Report.Warning (642, lexer.Location, "Possibly mistaken empty statement");
3571                 }
3572         }
3573         ;
3574
3575 do_statement
3576         : DO embedded_statement
3577           WHILE OPEN_PARENS {
3578                 oob_stack.Push (lexer.Location);
3579           }
3580           boolean_expression CLOSE_PARENS SEMICOLON
3581           {
3582                 Location l = (Location) oob_stack.Pop ();
3583
3584                 $$ = new Do ((Statement) $2, (Expression) $6, l);
3585           }
3586         ;
3587
3588 for_statement
3589         : FOR OPEN_PARENS
3590           opt_for_initializer SEMICOLON
3591           {
3592                 Block assign_block = new Block (current_block);
3593                 current_block = assign_block;
3594
3595                 if ($3 is DictionaryEntry){
3596                         DictionaryEntry de = (DictionaryEntry) $3;
3597
3598                         Expression type = (Expression) de.Key;
3599                         ArrayList var_declarators = (ArrayList) de.Value;
3600
3601                         foreach (VariableDeclaration decl in var_declarators){
3602
3603                                 LocalInfo vi;
3604
3605                                 vi = current_block.AddVariable (
3606                                         type, decl.identifier, current_local_parameters, decl.Location);
3607                                 if (vi == null)
3608                                         continue;
3609
3610                                 Location l = lexer.Location;
3611                                 Expression expr;
3612                                 if (decl.expression_or_array_initializer is Expression){
3613                                         expr = (Expression) decl.expression_or_array_initializer;
3614                                 } else if (decl.expression_or_array_initializer == null) {
3615                                         expr = null;
3616                                 } else {
3617                                         ArrayList init = (ArrayList) decl.expression_or_array_initializer;
3618                                         expr = new ArrayCreation (type, "", init, decl.Location);
3619                                 }
3620
3621                                 LocalVariableReference var;
3622                                 var = new LocalVariableReference (assign_block, decl.identifier, l);
3623
3624                                 if (expr != null) {
3625                                         Assign a = new Assign (var, expr, decl.Location);
3626
3627                                         assign_block.AddStatement (new StatementExpression (a, lexer.Location));
3628                                 }
3629                         }
3630
3631                         $3 = null;
3632                 }
3633                 oob_stack.Push (lexer.Location);
3634           }
3635           opt_for_condition SEMICOLON
3636           opt_for_iterator CLOSE_PARENS
3637           embedded_statement
3638           {
3639                 Location l = (Location) oob_stack.Pop ();
3640
3641                 For f = new For ((Statement) $3, (Expression) $6, (Statement) $8, (Statement) $10, l);
3642
3643                 if (RootContext.WarningLevel >= 3){
3644                         if ($10 == EmptyStatement.Value)
3645                                 Report.Warning (642, lexer.Location, "Possibly mistaken empty statement");
3646                 }
3647
3648                 current_block.AddStatement (f);
3649                 while (current_block.Implicit)
3650                         current_block = current_block.Parent;
3651                 $$ = current_block;
3652                 current_block = current_block.Parent;
3653           }
3654         ;
3655
3656 opt_for_initializer
3657         : /* empty */           { $$ = EmptyStatement.Value; }
3658         | for_initializer
3659         ;
3660
3661 for_initializer
3662         : local_variable_declaration
3663         | statement_expression_list
3664         ;
3665
3666 opt_for_condition
3667         : /* empty */           { $$ = null; }
3668         | boolean_expression
3669         ;
3670
3671 opt_for_iterator
3672         : /* empty */           { $$ = EmptyStatement.Value; }
3673         | for_iterator
3674         ;
3675
3676 for_iterator
3677         : statement_expression_list
3678         ;
3679
3680 statement_expression_list
3681         : statement_expression
3682           {
3683                 // CHANGE: was `null'
3684                 Block b = new Block (current_block, Block.Flags.Implicit);
3685
3686                 b.AddStatement ((Statement) $1);
3687                 $$ = b;
3688           }
3689         | statement_expression_list COMMA statement_expression
3690           {
3691                 Block b = (Block) $1;
3692
3693                 b.AddStatement ((Statement) $3);
3694                 $$ = $1;
3695           }
3696         ;
3697
3698 foreach_statement
3699         : FOREACH OPEN_PARENS type IDENTIFIER IN
3700           {
3701                 oob_stack.Push (lexer.Location);
3702           }
3703           expression CLOSE_PARENS
3704           {
3705                 oob_stack.Push (current_block);
3706
3707                 Block foreach_block = new Block (current_block, Block.Flags.Implicit);
3708                 LocalVariableReference v = null;
3709                 Location l = lexer.Location;
3710                 LocalInfo vi;
3711
3712                 vi = foreach_block.AddVariable ((Expression) $3, (string) $4, current_local_parameters, l);
3713                 if (vi != null) {
3714                         vi.ReadOnly = true;
3715
3716                         // Get a writable reference to this read-only variable.
3717                         v = new LocalVariableReference (foreach_block, (string) $4, l, vi, false);
3718                 }
3719                 current_block = foreach_block;
3720
3721                 oob_stack.Push (v);
3722                 oob_stack.Push (current_block);
3723           }
3724           embedded_statement
3725           {
3726                 Block foreach_block = (Block) oob_stack.Pop ();
3727                 LocalVariableReference v = (LocalVariableReference) oob_stack.Pop ();
3728                 Block prev_block = (Block) oob_stack.Pop ();
3729                 Location l = (Location) oob_stack.Pop ();
3730
3731                 current_block = prev_block;
3732
3733                 if (v != null) {
3734                         Foreach f = new Foreach ((Expression) $3, v, (Expression) $7, (Statement) $10, l);
3735                         foreach_block.AddStatement (f);
3736                 }
3737
3738                 $$ = foreach_block;
3739           }
3740         ;
3741
3742 jump_statement
3743         : break_statement
3744         | continue_statement
3745         | goto_statement
3746         | return_statement
3747         | throw_statement
3748         | yield_statement
3749         ;
3750
3751 break_statement
3752         : BREAK SEMICOLON
3753           {
3754                 $$ = new Break (lexer.Location);
3755           }
3756         ;
3757
3758 continue_statement
3759         : CONTINUE SEMICOLON
3760           {
3761                 $$ = new Continue (lexer.Location);
3762           }
3763         ;
3764
3765 goto_statement
3766         : GOTO IDENTIFIER SEMICOLON
3767           {
3768                 $$ = new Goto (current_block, (string) $2, lexer.Location);
3769           }
3770         | GOTO CASE constant_expression SEMICOLON
3771           {
3772                 $$ = new GotoCase ((Expression) $3, lexer.Location);
3773           }
3774         | GOTO DEFAULT SEMICOLON
3775           {
3776                 $$ = new GotoDefault (lexer.Location);
3777           }
3778         ;
3779
3780 return_statement
3781         : RETURN opt_expression SEMICOLON
3782           {
3783                 $$ = new Return ((Expression) $2, lexer.Location);
3784           }
3785         ;
3786
3787 throw_statement
3788         : THROW opt_expression SEMICOLON
3789           {
3790                 $$ = new Throw ((Expression) $2, lexer.Location);
3791           }
3792         ;
3793
3794 yield_statement
3795         : IDENTIFIER RETURN expression SEMICOLON
3796           {
3797                 string s = (string) $1;
3798                 if (s != "yield"){
3799                         Report.Error (1003, lexer.Location, "; expected");
3800                         $$ = null;
3801                 }
3802                 if (!RootContext.V2){
3803                         Report.Error (-222, lexer.Location, "yield statement only available in C# 2.0 mode");
3804                         $$ = null;
3805                 }
3806                 if (iterator_container == null){
3807                         Report.Error (204, lexer.Location, "yield statement can only be used within a method, operator or property");
3808                         $$ = null;
3809                 } else {
3810                         iterator_container.SetYields ();
3811                         $$ = new Yield ((Expression) $3, lexer.Location);
3812                 }
3813           }
3814         | IDENTIFIER BREAK SEMICOLON
3815           {
3816                 string s = (string) $1;
3817                 if (s != "yield"){
3818                         Report.Error (1003, lexer.Location, "; expected");
3819                         $$ = null;
3820                 }
3821                 if (!RootContext.V2){
3822                         Report.Error (-222, lexer.Location, "yield statement only available in C# 2.0 mode");
3823                         $$ = null;
3824                 }
3825                 if (iterator_container == null){
3826                         Report.Error (204, lexer.Location, "yield statement can only be used within a method, operator or property");
3827                         $$ = null;
3828                 } else {
3829                         iterator_container.SetYields ();
3830                         $$ = new YieldBreak (lexer.Location);
3831                 }
3832           }
3833         ;
3834
3835 opt_expression
3836         : /* empty */
3837         | expression
3838         ;
3839
3840 try_statement
3841         : TRY block catch_clauses
3842         {
3843                 Catch g = null;
3844                 ArrayList s = new ArrayList (4);
3845
3846                 foreach (Catch cc in (ArrayList) $3) {
3847                         if (cc.IsGeneral)
3848                                 g = cc;
3849                         else
3850                                 s.Add (cc);
3851                 }
3852
3853                 // Now s contains the list of specific catch clauses
3854                 // and g contains the general one.
3855
3856                 $$ = new Try ((Block) $2, s, g, null, lexer.Location);
3857         }
3858         | TRY block opt_catch_clauses FINALLY block
3859           {
3860                 Catch g = null;
3861                 ArrayList s = new ArrayList (4);
3862                 ArrayList catch_list = (ArrayList) $3;
3863
3864                 if (catch_list != null){
3865                         foreach (Catch cc in catch_list) {
3866                                 if (cc.IsGeneral)
3867                                         g = cc;
3868                                 else
3869                                         s.Add (cc);
3870                         }
3871                 }
3872
3873                 $$ = new Try ((Block) $2, s, g, (Block) $5, lexer.Location);
3874           }
3875         | TRY block error
3876           {
3877                 Report.Error (1524, lexer.Location, "Expected catch or finally");
3878           }
3879         ;
3880
3881 opt_catch_clauses
3882         : /* empty */  { $$ = null; }
3883         | catch_clauses
3884         ;
3885
3886 catch_clauses
3887         : catch_clause
3888           {
3889                 ArrayList l = new ArrayList (4);
3890
3891                 l.Add ($1);
3892                 $$ = l;
3893           }
3894         | catch_clauses catch_clause
3895           {
3896                 ArrayList l = (ArrayList) $1;
3897
3898                 l.Add ($2);
3899                 $$ = l;
3900           }
3901         ;
3902
3903 opt_identifier
3904         : /* empty */   { $$ = null; }
3905         | IDENTIFIER
3906         ;
3907
3908 catch_clause
3909         : CATCH opt_catch_args
3910         {
3911                 Expression type = null;
3912                 string id = null;
3913
3914                 if ($2 != null) {
3915                         DictionaryEntry cc = (DictionaryEntry) $2;
3916                         type = (Expression) cc.Key;
3917                         id   = (string) cc.Value;
3918
3919                         if (id != null){
3920                                 ArrayList one = new ArrayList (4);
3921                                 Location loc = lexer.Location;
3922
3923                                 one.Add (new VariableDeclaration (id, null, loc));
3924
3925                                 $1 = current_block;
3926                                 current_block = new Block (current_block);
3927                                 Block b = declare_local_variables (type, one, loc);
3928                                 current_block = b;
3929                         }
3930                 }
3931         } block {
3932                 Expression type = null;
3933                 string id = null;
3934
3935                 if ($2 != null){
3936                         DictionaryEntry cc = (DictionaryEntry) $2;
3937                         type = (Expression) cc.Key;
3938                         id   = (string) cc.Value;
3939
3940                         if ($1 != null){
3941                                 //
3942                                 // FIXME: I can change this for an assignment.
3943                                 //
3944                                 while (current_block != (Block) $1)
3945                                         current_block = current_block.Parent;
3946                         }
3947                 }
3948
3949
3950                 $$ = new Catch (type, id , (Block) $4, lexer.Location);
3951         }
3952         ;
3953
3954 opt_catch_args
3955         : /* empty */ { $$ = null; }
3956         | catch_args
3957         ;
3958
3959 catch_args
3960         : OPEN_PARENS type opt_identifier CLOSE_PARENS
3961         {
3962                 $$ = new DictionaryEntry ($2, $3);
3963         }
3964         ;
3965
3966 checked_statement
3967         : CHECKED block
3968           {
3969                 $$ = new Checked ((Block) $2);
3970           }
3971         ;
3972
3973 unchecked_statement
3974         : UNCHECKED block
3975           {
3976                 $$ = new Unchecked ((Block) $2);
3977           }
3978         ;
3979
3980 unsafe_statement
3981         : UNSAFE
3982         {
3983                 if (!RootContext.Unsafe){
3984                         Report.Error (227, lexer.Location,
3985                                 "Unsafe code can only be used if --unsafe is used");
3986                 }
3987         } block {
3988                 $$ = new Unsafe ((Block) $3);
3989         }
3990         ;
3991
3992 fixed_statement
3993         : FIXED OPEN_PARENS
3994           type fixed_pointer_declarators
3995           CLOSE_PARENS
3996           {
3997                 Block assign_block = new Block (current_block, Block.Flags.Implicit);
3998                 ArrayList list = (ArrayList) $4;
3999                 Expression type = (Expression) $3;
4000                 Location l = lexer.Location;
4001                 int top = list.Count;
4002
4003                 for (int i = 0; i < top; i++){
4004                         Pair p = (Pair) list [i];
4005                         LocalInfo v;
4006
4007                         v = current_block.AddVariable (type, (string) p.First,current_local_parameters, l);
4008                         if (v == null)
4009                                 continue;
4010                         v.ReadOnly = true;
4011                         p.First = v;
4012                         list [i] = p;
4013                 }
4014                 current_block.AddStatement (assign_block);
4015                 current_block = assign_block;
4016                 oob_stack.Push (assign_block);
4017                 oob_stack.Push (l);
4018           }
4019           embedded_statement
4020           {
4021                 Location l = (Location) oob_stack.Pop ();
4022                 oob_stack.Pop ();
4023
4024                 $$ = new Fixed ((Expression) $3, (ArrayList) $4, (Statement) $7, l);
4025           }
4026         ;
4027
4028 fixed_pointer_declarators
4029         : fixed_pointer_declarator      {
4030                 ArrayList declarators = new ArrayList (4);
4031                 declarators.Add ($1);
4032                 $$ = declarators;
4033           }
4034         | fixed_pointer_declarators COMMA fixed_pointer_declarator
4035           {
4036                 ArrayList declarators = (ArrayList) $1;
4037                 declarators.Add ($3);
4038                 $$ = declarators;
4039           }
4040         ;
4041
4042 fixed_pointer_declarator
4043         : IDENTIFIER ASSIGN expression
4044           {
4045                 $$ = new Pair ($1, $3);
4046           }
4047         ;
4048
4049 lock_statement
4050         : LOCK OPEN_PARENS expression CLOSE_PARENS
4051           {
4052                 //
4053           }
4054           embedded_statement
4055           {
4056                 $$ = new Lock ((Expression) $3, (Statement) $6, lexer.Location);
4057           }
4058         ;
4059
4060 using_statement
4061         : USING OPEN_PARENS resource_acquisition CLOSE_PARENS
4062           {
4063                 Block assign_block = new Block (current_block);
4064                 current_block = assign_block;
4065
4066                 oob_stack.Push (lexer.Location);
4067
4068                 if ($3 is DictionaryEntry){
4069                         DictionaryEntry de = (DictionaryEntry) $3;
4070                         Location l = lexer.Location;
4071
4072                         Expression type = (Expression) de.Key;
4073                         ArrayList var_declarators = (ArrayList) de.Value;
4074
4075                         ArrayList vars = new ArrayList (4);
4076
4077                         foreach (VariableDeclaration decl in var_declarators){
4078
4079                                 LocalInfo vi    = current_block.AddVariable (
4080                                         type, decl.identifier,
4081                                         current_local_parameters, decl.Location);
4082                                 if (vi == null)
4083                                         continue;
4084                                 vi.ReadOnly = true;
4085
4086                                 Expression expr;
4087                                 if (decl.expression_or_array_initializer is Expression){
4088                                         expr = (Expression) decl.expression_or_array_initializer;
4089                                 } else {
4090                                         ArrayList init = (ArrayList) decl.expression_or_array_initializer;
4091
4092                                         expr = new ArrayCreation (type, "", init, decl.Location);
4093                                 }
4094
4095                                 LocalVariableReference var;
4096
4097                                 // Get a writable reference to this read-only variable.
4098                                 var = new LocalVariableReference (assign_block, decl.identifier, l, vi, false);
4099
4100                                 // This is so that it is not a warning on using variables
4101                                 vi.Used = true;
4102
4103                                 vars.Add (new DictionaryEntry (var, expr));
4104
4105                                 // Assign a = new Assign (var, expr, decl.Location);
4106                                 // assign_block.AddStatement (new StatementExpression (a, lexer.Location));
4107                         }
4108                         $3 = new DictionaryEntry (type, vars);
4109                  }
4110           }
4111           embedded_statement
4112           {
4113                 Using u = new Using ($3, (Statement) $6, (Location) oob_stack.Pop ());
4114                 current_block.AddStatement (u);
4115                 while (current_block.Implicit)
4116                         current_block = current_block.Parent;
4117                 $$ = current_block;
4118                 current_block = current_block.Parent;
4119           }
4120         ;
4121
4122 resource_acquisition
4123         : local_variable_declaration
4124         | expression
4125         ;
4126
4127 %%
4128
4129 // <summary>
4130 //   A class used to pass around variable declarations and constants
4131 // </summary>
4132 public class VariableDeclaration {
4133         public string identifier;
4134         public object expression_or_array_initializer;
4135         public Location Location;
4136         public Attributes OptAttributes;
4137
4138         public VariableDeclaration (string id, object eoai, Location l, Attributes opt_attrs)
4139         {
4140                 this.identifier = id;
4141                 this.expression_or_array_initializer = eoai;
4142                 this.Location = l;
4143                 this.OptAttributes = opt_attrs;
4144         }
4145
4146         public VariableDeclaration (string id, object eoai, Location l) : this (id, eoai, l, null)
4147         {
4148         }
4149 }
4150
4151 /// <summary>
4152 ///  Used to pass around interface property information
4153 /// </summary>
4154 public class InterfaceAccessorInfo {
4155
4156         public bool has_get;
4157         public bool has_set;
4158         public Attributes get_attrs;
4159         public Attributes set_attrs;
4160
4161         public InterfaceAccessorInfo (bool has_get, bool has_set,
4162                                       Attributes get_attrs, Attributes set_attrs)
4163         {
4164                 this.has_get = has_get;
4165                 this.has_set = has_set;
4166                 this.get_attrs = get_attrs;
4167                 this.set_attrs = set_attrs;
4168         }
4169 }
4170
4171
4172 // <summary>
4173 //   A class used to hold info about an indexer declarator
4174 // </summary>
4175 public class IndexerDeclaration {
4176         public Expression type;
4177         public string interface_type;
4178         public Parameters param_list;
4179
4180         public IndexerDeclaration (Expression type, string interface_type, Parameters param_list)
4181         {
4182                 this.type = type;
4183                 this.interface_type = interface_type;
4184                 this.param_list = param_list;
4185         }
4186 }
4187
4188 //
4189 // We use this when we do not have an object in advance that is an IIteratorContainer
4190 //
4191 public class SimpleIteratorContainer : IIteratorContainer {
4192         public bool Yields;
4193
4194         public static SimpleIteratorContainer Simple = new SimpleIteratorContainer ();
4195
4196         //
4197         // Reset and return
4198         //
4199         public static SimpleIteratorContainer GetSimple () {
4200                 Simple.Yields = false;
4201                 return Simple;
4202         }
4203
4204         public void SetYields () { Yields = true; }
4205 }
4206
4207 // <summary>
4208 //  A class used to hold info about an operator declarator
4209 // </summary>
4210 public class OperatorDeclaration {
4211         public Operator.OpType optype;
4212         public Expression ret_type, arg1type, arg2type;
4213         public string arg1name, arg2name;
4214         public Location location;
4215
4216         public OperatorDeclaration (Operator.OpType op, Expression ret_type,
4217                                     Expression arg1type, string arg1name,
4218                                     Expression arg2type, string arg2name, Location location)
4219         {
4220                 optype = op;
4221                 this.ret_type = ret_type;
4222                 this.arg1type = arg1type;
4223                 this.arg1name = arg1name;
4224                 this.arg2type = arg2type;
4225                 this.arg2name = arg2name;
4226                 this.location = location;
4227         }
4228
4229 }
4230
4231 void Error_ExpectingTypeName (Location l, Expression expr)
4232 {
4233         if (expr is Invocation){
4234                 Report.Error (1002, l, "; expected");
4235         } else {
4236                 Report.Error (-1, l, "Invalid Type definition");
4237         }
4238 }
4239
4240 // <summary>
4241 //   Given the @class_name name, it creates a fully qualified name
4242 //   based on the containing declaration space
4243 // </summary>
4244 string
4245 MakeName (string class_name)
4246 {
4247         string ns = current_namespace.FullName;
4248         string container_name = current_container.Name;
4249
4250         if (container_name == ""){
4251                 if (ns != "")
4252                         return ns + "." + class_name;
4253                 else
4254                         return class_name;
4255         } else
4256                 return container_name + "." + class_name;
4257 }
4258
4259 // <summary>
4260 //   Used to report back to the user the result of a declaration
4261 //   in the current declaration space
4262 // </summary>
4263 void
4264 CheckDef (DeclSpace.AdditionResult result, string name, Location l)
4265 {
4266         if (result == DeclSpace.AdditionResult.Success)
4267                 return;
4268
4269         switch (result){
4270         case DeclSpace.AdditionResult.NameExists:
4271                 Report.Error (102, l, "The container `" + current_container.Name +
4272                                  "' already contains a definition for `"+
4273                                  name + "'");
4274                 break;
4275
4276
4277                 //
4278                 // This is handled only for static Constructors, because
4279                 // in reality we handle these by the semantic analysis later
4280                 //
4281         case DeclSpace.AdditionResult.MethodExists:
4282                 Report.Error (
4283                         111, l, "Class `"+current_container.Name+
4284                         "' already defines a member called '" +
4285                         name + "' with the same parameter types (more than one default constructor)");
4286                 break;
4287
4288         case DeclSpace.AdditionResult.EnclosingClash:
4289                 Report.Error (542, l, "Member names cannot be the same as their enclosing type");
4290                 break;
4291
4292         case DeclSpace.AdditionResult.NotAConstructor:
4293                 Report.Error (1520, l, "Class, struct, or interface method must have a return type");
4294                 break;
4295
4296         case DeclSpace.AdditionResult.Error:
4297                 // Error has already been reported.
4298                 break;
4299         }
4300 }
4301
4302 void
4303 CheckDef (bool result, string name, Location l)
4304 {
4305         if (result)
4306                 return;
4307         CheckDef (DeclSpace.AdditionResult.NameExists, name, l);
4308 }
4309
4310 Block declare_local_variables (Expression type, ArrayList variable_declarators, Location loc)
4311 {
4312         Block implicit_block;
4313         ArrayList inits = null;
4314
4315         //
4316         // We use the `Used' property to check whether statements
4317         // have been added to the current block.  If so, we need
4318         // to create another block to contain the new declaration
4319         // otherwise, as an optimization, we use the same block to
4320         // add the declaration.
4321         //
4322         // FIXME: A further optimization is to check if the statements
4323         // that were added were added as part of the initialization
4324         // below.  In which case, no other statements have been executed
4325         // and we might be able to reduce the number of blocks for
4326         // situations like this:
4327         //
4328         // int j = 1;  int k = j + 1;
4329         //
4330         if (current_block.Used) {
4331                 implicit_block = new Block (current_block, Block.Flags.Implicit, loc, Location.Null);
4332                 implicit_block.AddChildVariableNames (current_block);
4333         } else
4334                 implicit_block = current_block;
4335
4336         foreach (VariableDeclaration decl in variable_declarators){
4337
4338                 if (implicit_block.AddVariable (type, decl.identifier, current_local_parameters, decl.Location) != null) {
4339                         if (decl.expression_or_array_initializer != null){
4340                                 if (inits == null)
4341                                         inits = new ArrayList (4);
4342                                 inits.Add (decl);
4343                         }
4344                 }
4345         }
4346
4347         if (inits == null)
4348                 return implicit_block;
4349
4350         foreach (VariableDeclaration decl in inits){
4351                 Assign assign;
4352                 Expression expr;
4353
4354                 if (decl.expression_or_array_initializer is Expression){
4355                         expr = (Expression) decl.expression_or_array_initializer;
4356
4357                 } else {
4358                         ArrayList init = (ArrayList) decl.expression_or_array_initializer;
4359
4360                         expr = new ArrayCreation (type, "", init, decl.Location);
4361                 }
4362
4363                 LocalVariableReference var;
4364                 var = new LocalVariableReference (implicit_block, decl.identifier, loc);
4365
4366                 assign = new Assign (var, expr, decl.Location);
4367
4368                 implicit_block.AddStatement (new StatementExpression (assign, lexer.Location));
4369         }
4370
4371         return implicit_block;
4372 }
4373
4374 Block declare_local_constants (Expression type, ArrayList declarators)
4375 {
4376         Block implicit_block;
4377
4378         if (current_block.Used)
4379                 implicit_block = new Block (current_block, Block.Flags.Implicit);
4380         else
4381                 implicit_block = current_block;
4382
4383         foreach (VariableDeclaration decl in declarators){
4384                 implicit_block.AddConstant (type, decl.identifier, (Expression) decl.expression_or_array_initializer,
4385                                                   current_local_parameters, decl.Location);
4386         }
4387
4388         return implicit_block;
4389 }
4390
4391 void CheckAttributeTarget (string a)
4392 {
4393         switch (a) {
4394
4395         case "assembly" : case "module" : case "field" : case "method" : case "param" : case "property" : case "type" :
4396                 return;
4397
4398         default :
4399                 Location l = lexer.Location;
4400                 Report.Error (658, l, "`" + a + "' is an invalid attribute target");
4401                 break;
4402         }
4403
4404 }
4405
4406 void CheckUnaryOperator (Operator.OpType op)
4407 {
4408         switch (op) {
4409
4410         case Operator.OpType.LogicalNot:
4411         case Operator.OpType.OnesComplement:
4412         case Operator.OpType.Increment:
4413         case Operator.OpType.Decrement:
4414         case Operator.OpType.True:
4415         case Operator.OpType.False:
4416         case Operator.OpType.Addition:
4417         case Operator.OpType.Subtraction:
4418
4419                 break;
4420
4421         default :
4422                 Location l = lexer.Location;
4423                 Report.Error (1019, l, "Overloadable unary operator expected");
4424                 break;
4425
4426         }
4427 }
4428
4429 void CheckBinaryOperator (Operator.OpType op)
4430 {
4431         switch (op) {
4432
4433         case Operator.OpType.Addition:
4434         case Operator.OpType.Subtraction:
4435         case Operator.OpType.Multiply:
4436         case Operator.OpType.Division:
4437         case Operator.OpType.Modulus:
4438         case Operator.OpType.BitwiseAnd:
4439         case Operator.OpType.BitwiseOr:
4440         case Operator.OpType.ExclusiveOr:
4441         case Operator.OpType.LeftShift:
4442         case Operator.OpType.RightShift:
4443         case Operator.OpType.Equality:
4444         case Operator.OpType.Inequality:
4445         case Operator.OpType.GreaterThan:
4446         case Operator.OpType.LessThan:
4447         case Operator.OpType.GreaterThanOrEqual:
4448         case Operator.OpType.LessThanOrEqual:
4449                 break;
4450
4451         default :
4452                 Location l = lexer.Location;
4453                 Report.Error (1020, l, "Overloadable binary operator expected");
4454                 break;
4455         }
4456
4457 }
4458
4459 void syntax_error (Location l, string msg)
4460 {
4461         Report.Error (1003, l, "Syntax error, " + msg);
4462 }
4463
4464 void output (string s)
4465 {
4466         Console.WriteLine (s);
4467 }
4468
4469 void note (string s)
4470 {
4471         // Used to put annotations
4472 }
4473
4474 Tokenizer lexer;
4475
4476 public Tokenizer Lexer {
4477         get {
4478                 return lexer;
4479         }
4480 }
4481
4482 public CSharpParser (SeekableStreamReader reader, SourceFile file, ArrayList defines)
4483 {
4484         current_namespace = new NamespaceEntry (null, file, null, Location.Null);
4485         this.name = file.Name;
4486         this.file = file;
4487         current_container = RootContext.Tree.Types;
4488         current_container.NamespaceEntry = current_namespace;
4489         oob_stack = new Stack ();
4490         switch_stack = new Stack ();
4491
4492         lexer = new Tokenizer (reader, file, defines);
4493 }
4494
4495 public void parse ()
4496 {
4497         try {
4498                 if (yacc_verbose_flag)
4499                         yyparse (lexer, new yydebug.yyDebugSimple ());
4500                 else
4501                         yyparse (lexer);
4502                 Tokenizer tokenizer = lexer as Tokenizer;
4503                 tokenizer.cleanup ();
4504         } catch (Exception e){
4505                 // Please do not remove this, it is used during debugging
4506                 // of the grammar
4507                 //
4508                 Console.WriteLine (e);
4509                 Report.Error (-25, lexer.Location, "Parsing error");
4510                 if (Driver.parser_verbose)
4511                         Console.WriteLine (e);
4512         }
4513 }
4514
4515 void CheckToken (int error, int yyToken, string msg)
4516 {
4517         if (yyToken >= Token.FIRST_KEYWORD && yyToken <= Token.LAST_KEYWORD){
4518                 Report.Error (error, lexer.Location, String.Format ("{0}: `{1}' is a keyword", msg, yyNames [yyToken].ToLower ()));
4519                 return;
4520         }
4521         Report.Error (error, lexer.Location, msg);
4522 }
4523
4524 void CheckIdentifierToken (int yyToken)
4525 {
4526         CheckToken (1041, yyToken, "Identifier expected");
4527 }
4528
4529 /* end end end */
4530 }