nsz Git - cparser/blob - ast_t.h

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #ifndef AST_T_H
  21 #define AST_T_H
  22
  23 #include <libfirm/firm_types.h>
  24 #include <assert.h>
  25
  26 #include "ast.h"
  27 #include "symbol.h"
  28 #include "token_t.h"
  29 #include "type.h"
  30 #include "adt/obst.h"
  31
  32 /** The AST obstack contains all data that must stay in the AST. */
  33 extern struct obstack ast_obstack;
  34
  35 /**
  36  * Expression kinds.
  37  */
  38 typedef enum {
  39         EXPR_UNKNOWN = 0,
  40         EXPR_INVALID,
  41         EXPR_REFERENCE,
  42         EXPR_CONST,
  43         EXPR_CHARACTER_CONSTANT,
  44         EXPR_WIDE_CHARACTER_CONSTANT,
  45         EXPR_STRING_LITERAL,
  46         EXPR_WIDE_STRING_LITERAL,
  47         EXPR_COMPOUND_LITERAL,
  48         EXPR_CALL,
  49         EXPR_CONDITIONAL,
  50         EXPR_SELECT,
  51         EXPR_ARRAY_ACCESS,
  52         EXPR_SIZEOF,
  53         EXPR_CLASSIFY_TYPE,
  54         EXPR_ALIGNOF,
  55
  56         EXPR_FUNCNAME,
  57         EXPR_BUILTIN_SYMBOL,
  58         EXPR_BUILTIN_CONSTANT_P,
  59         EXPR_BUILTIN_PREFETCH,
  60         EXPR_OFFSETOF,
  61         EXPR_VA_START,
  62         EXPR_VA_ARG,
  63         EXPR_STATEMENT,
  64
  65         EXPR_UNARY_FIRST,
  66         EXPR_UNARY_NEGATE = EXPR_UNARY_FIRST,
  67         EXPR_UNARY_PLUS,
  68         EXPR_UNARY_BITWISE_NEGATE,
  69         EXPR_UNARY_NOT,
  70         EXPR_UNARY_DEREFERENCE,
  71         EXPR_UNARY_TAKE_ADDRESS,
  72         EXPR_UNARY_POSTFIX_INCREMENT,
  73         EXPR_UNARY_POSTFIX_DECREMENT,
  74         EXPR_UNARY_PREFIX_INCREMENT,
  75         EXPR_UNARY_PREFIX_DECREMENT,
  76         EXPR_UNARY_CAST,
  77         EXPR_UNARY_CAST_IMPLICIT, /**< compiler generated cast */
  78         EXPR_UNARY_ASSUME,        /**< MS __assume() */
  79         EXPR_UNARY_LAST = EXPR_UNARY_ASSUME,
  80
  81         EXPR_BINARY_FIRST,
  82         EXPR_BINARY_ADD = EXPR_BINARY_FIRST,
  83         EXPR_BINARY_SUB,
  84         EXPR_BINARY_MUL,
  85         EXPR_BINARY_DIV,
  86         EXPR_BINARY_MOD,
  87         EXPR_BINARY_EQUAL,
  88         EXPR_BINARY_NOTEQUAL,
  89         EXPR_BINARY_LESS,
  90         EXPR_BINARY_LESSEQUAL,
  91         EXPR_BINARY_GREATER,
  92         EXPR_BINARY_GREATEREQUAL,
  93         EXPR_BINARY_BITWISE_AND,
  94         EXPR_BINARY_BITWISE_OR,
  95         EXPR_BINARY_BITWISE_XOR,
  96         EXPR_BINARY_LOGICAL_AND,
  97         EXPR_BINARY_LOGICAL_OR,
  98         EXPR_BINARY_SHIFTLEFT,
  99         EXPR_BINARY_SHIFTRIGHT,
 100         EXPR_BINARY_ASSIGN,
 101         EXPR_BINARY_MUL_ASSIGN,
 102         EXPR_BINARY_DIV_ASSIGN,
 103         EXPR_BINARY_MOD_ASSIGN,
 104         EXPR_BINARY_ADD_ASSIGN,
 105         EXPR_BINARY_SUB_ASSIGN,
 106         EXPR_BINARY_SHIFTLEFT_ASSIGN,
 107         EXPR_BINARY_SHIFTRIGHT_ASSIGN,
 108         EXPR_BINARY_BITWISE_AND_ASSIGN,
 109         EXPR_BINARY_BITWISE_XOR_ASSIGN,
 110         EXPR_BINARY_BITWISE_OR_ASSIGN,
 111         EXPR_BINARY_COMMA,
 112
 113         EXPR_BINARY_BUILTIN_EXPECT,
 114         EXPR_BINARY_ISGREATER,
 115         EXPR_BINARY_ISGREATEREQUAL,
 116         EXPR_BINARY_ISLESS,
 117         EXPR_BINARY_ISLESSEQUAL,
 118         EXPR_BINARY_ISLESSGREATER,
 119         EXPR_BINARY_ISUNORDERED,
 120         EXPR_BINARY_LAST = EXPR_BINARY_ISUNORDERED,
 121 } expression_kind_t;
 122
 123 typedef enum {
 124         FUNCNAME_FUNCTION,           /**< C99 __func__, older __FUNCTION__ */
 125         FUNCNAME_PRETTY_FUNCTION,    /**< GNUC __PRETTY_FUNCTION__ */
 126         FUNCNAME_FUNCSIG,            /**< MS __FUNCSIG__ */
 127         FUNCNAME_FUNCDNAME           /**< MS __FUNCDNAME__ */
 128 } funcname_kind_t;
 129
 130 /* convenience macros */
 131 #define EXPR_BINARY_CASES                  \
 132         case EXPR_BINARY_ADD:                  \
 133         case EXPR_BINARY_SUB:                  \
 134         case EXPR_BINARY_MUL:                  \
 135         case EXPR_BINARY_DIV:                  \
 136         case EXPR_BINARY_MOD:                  \
 137         case EXPR_BINARY_EQUAL:                \
 138         case EXPR_BINARY_NOTEQUAL:             \
 139         case EXPR_BINARY_LESS:                 \
 140         case EXPR_BINARY_LESSEQUAL:            \
 141         case EXPR_BINARY_GREATER:              \
 142         case EXPR_BINARY_GREATEREQUAL:         \
 143         case EXPR_BINARY_BITWISE_AND:          \
 144         case EXPR_BINARY_BITWISE_OR:           \
 145         case EXPR_BINARY_BITWISE_XOR:          \
 146         case EXPR_BINARY_LOGICAL_AND:          \
 147         case EXPR_BINARY_LOGICAL_OR:           \
 148         case EXPR_BINARY_SHIFTLEFT:            \
 149         case EXPR_BINARY_SHIFTRIGHT:           \
 150         case EXPR_BINARY_ASSIGN:               \
 151         case EXPR_BINARY_MUL_ASSIGN:           \
 152         case EXPR_BINARY_DIV_ASSIGN:           \
 153         case EXPR_BINARY_MOD_ASSIGN:           \
 154         case EXPR_BINARY_ADD_ASSIGN:           \
 155         case EXPR_BINARY_SUB_ASSIGN:           \
 156         case EXPR_BINARY_SHIFTLEFT_ASSIGN:     \
 157         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:    \
 158         case EXPR_BINARY_BITWISE_AND_ASSIGN:   \
 159         case EXPR_BINARY_BITWISE_XOR_ASSIGN:   \
 160         case EXPR_BINARY_BITWISE_OR_ASSIGN:    \
 161         case EXPR_BINARY_COMMA:                \
 162         case EXPR_BINARY_BUILTIN_EXPECT:       \
 163         case EXPR_BINARY_ISGREATER:            \
 164         case EXPR_BINARY_ISGREATEREQUAL:       \
 165         case EXPR_BINARY_ISLESS:               \
 166         case EXPR_BINARY_ISLESSEQUAL:          \
 167         case EXPR_BINARY_ISLESSGREATER:        \
 168         case EXPR_BINARY_ISUNORDERED:
 169
 170 #define EXPR_UNARY_CASES                   \
 171         case EXPR_UNARY_NEGATE:                \
 172         case EXPR_UNARY_PLUS:                  \
 173         case EXPR_UNARY_BITWISE_NEGATE:        \
 174         case EXPR_UNARY_NOT:                   \
 175         case EXPR_UNARY_DEREFERENCE:           \
 176         case EXPR_UNARY_TAKE_ADDRESS:          \
 177         case EXPR_UNARY_POSTFIX_INCREMENT:     \
 178         case EXPR_UNARY_POSTFIX_DECREMENT:     \
 179         case EXPR_UNARY_PREFIX_INCREMENT:      \
 180         case EXPR_UNARY_PREFIX_DECREMENT:      \
 181         case EXPR_UNARY_CAST:                  \
 182         case EXPR_UNARY_CAST_IMPLICIT:         \
 183         case EXPR_UNARY_ASSUME:
 184
 185 /**
 186  * A scope containing declarations.
 187  */
 188 struct scope_t {
 189         declaration_t *declarations;      /**< List of declarations in this scope. */
 190         declaration_t *last_declaration;  /**< last declaration in this scope. */
 191 };
 192
 193 struct expression_base_t {
 194         expression_kind_t   kind;
 195         type_t             *type;
 196         source_position_t   source_position;
 197 #ifndef NDEBUG
 198         bool                transformed;
 199 #endif
 200 };
 201
 202 struct const_expression_t {
 203         expression_base_t  base;
 204         union {
 205                 long long      int_value;
 206                 long double    float_value;
 207                 string_t       character;
 208                 wide_string_t  wide_character;
 209         } v;
 210         bool               is_ms_noop;  /**< True, if this constant is the result
 211                                              of an microsoft __noop operator */
 212 };
 213
 214 struct string_literal_expression_t {
 215         expression_base_t  base;
 216         string_t           value;
 217 };
 218
 219 struct funcname_expression_t {
 220         expression_base_t  base;
 221         funcname_kind_t    kind;
 222         string_t           value;     /**< the value once assigned. */
 223 };
 224
 225 struct wide_string_literal_expression_t {
 226         expression_base_t  base;
 227         wide_string_t      value;
 228 };
 229
 230 struct compound_literal_expression_t {
 231         expression_base_t  base;
 232         type_t            *type;
 233         initializer_t     *initializer;
 234 };
 235
 236 struct builtin_symbol_expression_t {
 237         expression_base_t  base;
 238         symbol_t          *symbol;
 239 };
 240
 241 struct builtin_constant_expression_t {
 242         expression_base_t  base;
 243         expression_t      *value;
 244 };
 245
 246 struct builtin_prefetch_expression_t {
 247         expression_base_t  base;
 248         expression_t      *adr;
 249         expression_t      *rw;
 250         expression_t      *locality;
 251 };
 252
 253 struct reference_expression_t {
 254         expression_base_t  base;
 255         declaration_t     *declaration;
 256 };
 257
 258 struct call_argument_t {
 259         expression_t    *expression;
 260         call_argument_t *next;
 261 };
 262
 263 struct call_expression_t {
 264         expression_base_t  base;
 265         expression_t      *function;
 266         call_argument_t   *arguments;
 267 };
 268
 269 struct unary_expression_t {
 270         expression_base_t  base;
 271         expression_t      *value;
 272 };
 273
 274 struct binary_expression_t {
 275         expression_base_t  base;
 276         expression_t      *left;
 277         expression_t      *right;
 278 };
 279
 280 struct select_expression_t {
 281         expression_base_t  base;
 282         expression_t      *compound;
 283         symbol_t          *symbol;
 284
 285         declaration_t     *compound_entry;
 286 };
 287
 288 struct array_access_expression_t {
 289         expression_base_t  base;
 290         expression_t      *array_ref;
 291         expression_t      *index;
 292         bool               flipped; /* index/ref was written in a 5[a] way */
 293 };
 294
 295 struct typeprop_expression_t {
 296         expression_base_t  base;
 297         type_t            *type;
 298         expression_t      *tp_expression;
 299 };
 300
 301 struct designator_t {
 302         source_position_t  source_position;
 303         symbol_t          *symbol;
 304         expression_t      *array_index;
 305         designator_t      *next;
 306 };
 307
 308 struct offsetof_expression_t {
 309         expression_base_t  base;
 310         type_t            *type;
 311         designator_t      *designator;
 312 };
 313
 314 struct va_start_expression_t {
 315         expression_base_t  base;
 316         expression_t      *ap;
 317         declaration_t     *parameter;
 318 };
 319
 320 struct va_arg_expression_t {
 321         expression_base_t  base;
 322         expression_t      *ap;
 323 };
 324
 325 struct conditional_expression_t {
 326         expression_base_t  base;
 327         expression_t      *condition;
 328         expression_t      *true_expression;
 329         expression_t      *false_expression;
 330 };
 331
 332 struct statement_expression_t {
 333         expression_base_t  base;
 334         statement_t       *statement;
 335 };
 336
 337 struct classify_type_expression_t {
 338         expression_base_t  base;
 339         expression_t      *type_expression;
 340 };
 341
 342 union expression_t {
 343         expression_kind_t                kind;
 344         expression_base_t                base;
 345         const_expression_t               conste;
 346         funcname_expression_t            funcname;
 347         string_literal_expression_t      string;
 348         wide_string_literal_expression_t wide_string;
 349         compound_literal_expression_t    compound_literal;
 350         builtin_symbol_expression_t      builtin_symbol;
 351         builtin_constant_expression_t    builtin_constant;
 352         builtin_prefetch_expression_t    builtin_prefetch;
 353         reference_expression_t           reference;
 354         call_expression_t                call;
 355         unary_expression_t               unary;
 356         binary_expression_t              binary;
 357         select_expression_t              select;
 358         array_access_expression_t        array_access;
 359         typeprop_expression_t            typeprop;
 360         offsetof_expression_t            offsetofe;
 361         va_start_expression_t            va_starte;
 362         va_arg_expression_t              va_arge;
 363         conditional_expression_t         conditional;
 364         statement_expression_t           statement;
 365         classify_type_expression_t       classify_type;
 366 };
 367
 368 typedef enum {
 369         STORAGE_CLASS_NONE,
 370         STORAGE_CLASS_EXTERN,
 371         STORAGE_CLASS_STATIC,
 372         STORAGE_CLASS_TYPEDEF,
 373         STORAGE_CLASS_AUTO,
 374         STORAGE_CLASS_REGISTER,
 375         STORAGE_CLASS_ENUM_ENTRY,
 376         STORAGE_CLASS_THREAD,
 377         STORAGE_CLASS_THREAD_EXTERN,
 378         STORAGE_CLASS_THREAD_STATIC,
 379 } storage_class_tag_t;
 380
 381 typedef enum {
 382         NAMESPACE_NORMAL,
 383         NAMESPACE_STRUCT,
 384         NAMESPACE_UNION,
 385         NAMESPACE_ENUM,
 386         NAMESPACE_LABEL,
 387 } namespace_t;
 388
 389 typedef enum {
 390         INITIALIZER_VALUE,
 391         INITIALIZER_LIST,
 392         INITIALIZER_STRING,
 393         INITIALIZER_WIDE_STRING,
 394         INITIALIZER_DESIGNATOR
 395 } initializer_kind_t;
 396
 397 struct initializer_base_t {
 398         initializer_kind_t kind;
 399 };
 400
 401 struct initializer_value_t {
 402         initializer_base_t  base;
 403         expression_t       *value;
 404 };
 405
 406 struct initializer_list_t {
 407         initializer_base_t  base;
 408         size_t              len;
 409         initializer_t      *initializers[];
 410 };
 411
 412 struct initializer_string_t {
 413         initializer_base_t base;
 414         string_t           string;
 415 };
 416
 417 struct initializer_wide_string_t {
 418         initializer_base_t  base;
 419         wide_string_t       string;
 420 };
 421
 422 struct initializer_designator_t {
 423         initializer_base_t  base;
 424         designator_t       *designator;
 425 };
 426
 427 union initializer_t {
 428         initializer_kind_t        kind;
 429         initializer_base_t        base;
 430         initializer_value_t       value;
 431         initializer_list_t        list;
 432         initializer_string_t      string;
 433         initializer_wide_string_t wide_string;
 434         initializer_designator_t  designator;
 435 };
 436
 437 /**
 438  * GNU attributes.
 439  */
 440 typedef enum gnu_attribute_kind_t {
 441         GNU_AK_CONST,
 442         GNU_AK_VOLATILE,
 443         GNU_AK_CDECL,
 444         GNU_AK_STDCALL,
 445         GNU_AK_FASTCALL,
 446         GNU_AK_DEPRECATED,
 447         GNU_AK_NOINLINE,
 448         GNU_AK_NORETURN,
 449         GNU_AK_NAKED,
 450         GNU_AK_PURE,
 451         GNU_AK_ALWAYS_INLINE,
 452         GNU_AK_MALLOC,
 453         GNU_AK_WEAK,
 454         GNU_AK_CONSTRUCTOR,
 455         GNU_AK_DESTRUCTOR,
 456         GNU_AK_NOTHROW,
 457         GNU_AK_TRANSPARENT_UNION,
 458         GNU_AK_COMMON,
 459         GNU_AK_NOCOMMON,
 460         GNU_AK_PACKED,
 461         GNU_AK_SHARED,
 462         GNU_AK_NOTSHARED,
 463         GNU_AK_USED,
 464         GNU_AK_UNUSED,
 465         GNU_AK_NO_INSTRUMENT_FUNCTION,
 466         GNU_AK_WARN_UNUSED_RESULT,
 467         GNU_AK_LONGCALL,
 468         GNU_AK_SHORTCALL,
 469         GNU_AK_LONG_CALL,
 470         GNU_AK_SHORT_CALL,
 471         GNU_AK_FUNCTION_VECTOR,
 472         GNU_AK_INTERRUPT,
 473         GNU_AK_INTERRUPT_HANDLER,
 474         GNU_AK_NMI_HANDLER,
 475         GNU_AK_NESTING,
 476         GNU_AK_NEAR,
 477         GNU_AK_FAR,
 478         GNU_AK_SIGNAL,
 479         GNU_AK_EIGTHBIT_DATA,
 480         GNU_AK_TINY_DATA,
 481         GNU_AK_SAVEALL,
 482         GNU_AK_FLATTEN,
 483         GNU_AK_SSEREGPARM,
 484         GNU_AK_EXTERNALLY_VISIBLE,
 485         GNU_AK_RETURN_TWICE,
 486         GNU_AK_MAY_ALIAS,
 487         GNU_AK_MS_STRUCT,
 488         GNU_AK_GCC_STRUCT,
 489         GNU_AK_DLLIMPORT,
 490         GNU_AK_DLLEXPORT,
 491         GNU_AK_ALIGNED,
 492         GNU_AK_ALIAS,
 493         GNU_AK_SECTION,
 494         GNU_AK_FORMAT,
 495         GNU_AK_FORMAT_ARG,
 496         GNU_AK_WEAKREF,
 497         GNU_AK_NONNULL,
 498         GNU_AK_TLS_MODEL,
 499         GNU_AK_VISIBILITY,
 500         GNU_AK_REGPARM,
 501         GNU_AK_MODEL,
 502         GNU_AK_MODE,
 503         GNU_AK_TRAP_EXIT,
 504         GNU_AK_SP_SWITCH,
 505         GNU_AK_SENTINEL,
 506         GNU_AK_LAST
 507 } gnu_attribute_kind_t;
 508
 509 /**
 510  * Extended microsoft modifier.
 511  */
 512 typedef enum {
 513         DM_DLLIMPORT        = (1 <<  0),
 514         DM_DLLEXPORT        = (1 <<  1),
 515         DM_THREAD           = (1 <<  2),
 516         DM_NAKED            = (1 <<  3),
 517         DM_MICROSOFT_INLINE = (1 <<  4),
 518         DM_FORCEINLINE      = (1 <<  5),
 519         DM_SELECTANY        = (1 <<  6),
 520         DM_NOTHROW          = (1 <<  7),
 521         DM_NOVTABLE         = (1 <<  8),
 522         DM_NORETURN         = (1 <<  9),
 523         DM_NOINLINE         = (1 << 10),
 524         DM_RESTRICT         = (1 << 11),
 525         DM_NOALIAS          = (1 << 12)
 526 } decl_modifier_t;
 527
 528 typedef unsigned short decl_modifiers_t;
 529
 530 struct declaration_t {
 531         unsigned char       namespc;
 532         unsigned char       declared_storage_class;
 533         unsigned char       storage_class;
 534         unsigned char       alignment;          /**< Alignment of the declaration, 0 for default. */
 535         decl_modifiers_t    decl_modifiers;     /**< MS __declspec modifiers. */
 536         const char         *deprecated_string;  /**< MS deprecated string if any. */
 537         symbol_t           *get_property_sym;   /**< MS get property. */
 538         symbol_t           *put_property_sym;   /**< MS put property. */
 539         unsigned int        address_taken : 1;
 540         unsigned int        is_inline     : 1;
 541         unsigned int        used          : 1;  /**< Set if the declaration is used. */
 542         unsigned int        deprecated    : 1;  /**< Microsoft or GNU deprecated attribute. */
 543         type_t             *type;
 544         symbol_t           *symbol;
 545         source_position_t   source_position;
 546         union {
 547                 bool            complete;           /**< used to indicate wether struct/union types are already defined or if just the name is declared */
 548                 statement_t    *statement;
 549                 initializer_t  *initializer;
 550                 expression_t   *enum_value;
 551         } init;
 552         scope_t             scope;              /**< The scope that this declaration opens. */
 553         scope_t            *parent_scope;       /**< The parent scope where this declaration lives. */
 554
 555         /** next declaration in a scope */
 556         declaration_t      *next;
 557         /** next declaration with same symbol */
 558         declaration_t      *symbol_next;
 559
 560         /* the following fields are used in ast2firm module */
 561         unsigned char       declaration_kind;
 562         union {
 563                 unsigned int  value_number;
 564                 ir_entity    *entity;
 565                 ir_node      *block;
 566                 ir_node      *vla_base;
 567                 tarval       *enum_val;
 568                 ir_type      *irtype;
 569         } v;
 570 };
 571
 572 typedef enum {
 573         STATEMENT_INVALID,
 574         STATEMENT_EMPTY,
 575         STATEMENT_COMPOUND,
 576         STATEMENT_RETURN,
 577         STATEMENT_DECLARATION,
 578         STATEMENT_IF,
 579         STATEMENT_SWITCH,
 580         STATEMENT_EXPRESSION,
 581         STATEMENT_CONTINUE,
 582         STATEMENT_BREAK,
 583         STATEMENT_GOTO,
 584         STATEMENT_LABEL,
 585         STATEMENT_CASE_LABEL,
 586         STATEMENT_WHILE,
 587         STATEMENT_DO_WHILE,
 588         STATEMENT_FOR,
 589         STATEMENT_ASM,
 590         STATEMENT_MS_TRY,
 591         STATEMENT_LEAVE
 592 } statement_kind_t;
 593
 594 struct statement_base_t {
 595         statement_kind_t   kind;
 596         statement_t       *next;
 597         source_position_t  source_position;
 598 #ifndef NDEBUG
 599         bool               transformed;
 600 #endif
 601 };
 602
 603 struct invalid_statement_t {
 604         statement_base_t  base;
 605 };
 606
 607 struct empty_statement_t {
 608         statement_base_t  base;
 609 };
 610
 611 struct return_statement_t {
 612         statement_base_t  base;
 613         expression_t     *value;
 614 };
 615
 616 struct compound_statement_t {
 617         statement_base_t  base;
 618         statement_t      *statements;
 619         scope_t           scope;
 620 };
 621
 622 struct declaration_statement_t {
 623         statement_base_t  base;
 624         declaration_t    *declarations_begin;
 625         declaration_t    *declarations_end;
 626 };
 627
 628 struct if_statement_t {
 629         statement_base_t  base;
 630         expression_t     *condition;
 631         statement_t      *true_statement;
 632         statement_t      *false_statement;
 633 };
 634
 635 struct switch_statement_t {
 636         statement_base_t       base;
 637         expression_t           *expression;
 638         statement_t            *body;
 639         case_label_statement_t *first_case, *last_case;
 640 };
 641
 642 struct goto_statement_t {
 643         statement_base_t  base;
 644         declaration_t    *label;     /**< The destination label. */
 645         goto_statement_t *next;      /**< links all goto statements of a function */
 646 };
 647
 648 struct case_label_statement_t {
 649         statement_base_t        base;
 650         expression_t           *expression;  /**< The case label expression, NULL for default label. */
 651         expression_t           *end_range;   /**< For GNUC case a .. b: the end range expression, NULL else. */
 652         statement_t            *statement;
 653         case_label_statement_t *next; /**< link to the next case label in switch */
 654 };
 655
 656 struct label_statement_t {
 657         statement_base_t   base;
 658         declaration_t     *label;
 659         statement_t       *statement;
 660         label_statement_t *next;    /**< links all label statements of a function */
 661 };
 662
 663 struct expression_statement_t {
 664         statement_base_t  base;
 665         expression_t     *expression;
 666 };
 667
 668 struct while_statement_t {
 669         statement_base_t  base;
 670         expression_t     *condition;
 671         statement_t      *body;
 672 };
 673
 674 struct do_while_statement_t {
 675         statement_base_t  base;
 676         expression_t     *condition;
 677         statement_t      *body;
 678 };
 679
 680 struct for_statement_t {
 681         statement_base_t  base;
 682         expression_t     *initialisation;
 683         expression_t     *condition;
 684         expression_t     *step;
 685         statement_t      *body;
 686         scope_t           scope;
 687 };
 688
 689 struct asm_constraint_t {
 690         string_t          constraints;
 691         expression_t     *expression;
 692         symbol_t         *symbol;
 693         asm_constraint_t *next;
 694 };
 695
 696 struct asm_clobber_t {
 697         string_t       clobber;
 698         asm_clobber_t *next;
 699 };
 700
 701 struct asm_statement_t {
 702         statement_base_t  base;
 703         string_t          asm_text;
 704         asm_constraint_t *inputs;
 705         asm_constraint_t *outputs;
 706         asm_clobber_t    *clobbers;
 707         bool              is_volatile;
 708 };
 709
 710 struct ms_try_statement_t {
 711         statement_base_t  base;
 712         statement_t      *try_statement;
 713         expression_t     *except_expression; /**< non-null for except, NULL for finally */
 714         statement_t      *final_statement;
 715 };
 716
 717 struct leave_statement_t {
 718         statement_base_t  base;
 719 };
 720
 721 union statement_t {
 722         statement_kind_t         kind;
 723         statement_base_t         base;
 724         return_statement_t       returns;
 725         compound_statement_t     compound;
 726         declaration_statement_t  declaration;
 727         if_statement_t           ifs;
 728         switch_statement_t       switchs;
 729         goto_statement_t         gotos;
 730         case_label_statement_t   case_label;
 731         label_statement_t        label;
 732         expression_statement_t   expression;
 733         while_statement_t        whiles;
 734         do_while_statement_t     do_while;
 735         for_statement_t          fors;
 736         asm_statement_t          asms;
 737         ms_try_statement_t       ms_try;
 738         leave_statement_t        leave;
 739 };
 740
 741 struct translation_unit_t {
 742         scope_t scope;
 743 };
 744
 745 static inline
 746 void *_allocate_ast(size_t size)
 747 {
 748         return obstack_alloc(&ast_obstack, size);
 749 }
 750
 751 static inline
 752 bool is_invalid_expression(expression_t *expression)
 753 {
 754         return expression->base.kind == EXPR_INVALID;
 755 }
 756
 757 static inline
 758 bool is_invalid_statement(statement_t *statement)
 759 {
 760         return statement->base.kind == STATEMENT_INVALID;
 761 }
 762
 763
 764 #define allocate_ast(size)                 _allocate_ast(size)
 765
 766 #endif