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