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 expression_kind_t {
  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 funcname_kind_t {
 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         declaration_t     *compound_entry;
 284 };
 285
 286 struct array_access_expression_t {
 287         expression_base_t  base;
 288         expression_t      *array_ref;
 289         expression_t      *index;
 290         bool               flipped; /* index/ref was written in a 5[a] way */
 291 };
 292
 293 struct typeprop_expression_t {
 294         expression_base_t  base;
 295         type_t            *type;
 296         expression_t      *tp_expression;
 297 };
 298
 299 struct designator_t {
 300         source_position_t  source_position;
 301         symbol_t          *symbol;
 302         expression_t      *array_index;
 303         designator_t      *next;
 304 };
 305
 306 struct offsetof_expression_t {
 307         expression_base_t  base;
 308         type_t            *type;
 309         designator_t      *designator;
 310 };
 311
 312 struct va_start_expression_t {
 313         expression_base_t  base;
 314         expression_t      *ap;
 315         declaration_t     *parameter;
 316 };
 317
 318 struct va_arg_expression_t {
 319         expression_base_t  base;
 320         expression_t      *ap;
 321 };
 322
 323 struct conditional_expression_t {
 324         expression_base_t  base;
 325         expression_t      *condition;
 326         expression_t      *true_expression;
 327         expression_t      *false_expression;
 328 };
 329
 330 struct statement_expression_t {
 331         expression_base_t  base;
 332         statement_t       *statement;
 333 };
 334
 335 struct classify_type_expression_t {
 336         expression_base_t  base;
 337         expression_t      *type_expression;
 338 };
 339
 340 union expression_t {
 341         expression_kind_t                kind;
 342         expression_base_t                base;
 343         const_expression_t               conste;
 344         funcname_expression_t            funcname;
 345         string_literal_expression_t      string;
 346         wide_string_literal_expression_t wide_string;
 347         compound_literal_expression_t    compound_literal;
 348         builtin_symbol_expression_t      builtin_symbol;
 349         builtin_constant_expression_t    builtin_constant;
 350         builtin_prefetch_expression_t    builtin_prefetch;
 351         reference_expression_t           reference;
 352         call_expression_t                call;
 353         unary_expression_t               unary;
 354         binary_expression_t              binary;
 355         select_expression_t              select;
 356         array_access_expression_t        array_access;
 357         typeprop_expression_t            typeprop;
 358         offsetof_expression_t            offsetofe;
 359         va_start_expression_t            va_starte;
 360         va_arg_expression_t              va_arge;
 361         conditional_expression_t         conditional;
 362         statement_expression_t           statement;
 363         classify_type_expression_t       classify_type;
 364 };
 365
 366 typedef enum storage_class_tag_t {
 367         STORAGE_CLASS_NONE,
 368         STORAGE_CLASS_EXTERN,
 369         STORAGE_CLASS_STATIC,
 370         STORAGE_CLASS_TYPEDEF,
 371         STORAGE_CLASS_AUTO,
 372         STORAGE_CLASS_REGISTER,
 373         STORAGE_CLASS_ENUM_ENTRY,
 374         STORAGE_CLASS_THREAD,
 375         STORAGE_CLASS_THREAD_EXTERN,
 376         STORAGE_CLASS_THREAD_STATIC,
 377 } storage_class_tag_t;
 378
 379 typedef enum namespace_t {
 380         NAMESPACE_NORMAL,
 381         NAMESPACE_STRUCT,
 382         NAMESPACE_UNION,
 383         NAMESPACE_ENUM,
 384         NAMESPACE_LABEL,
 385 } namespace_t;
 386
 387 typedef enum initializer_kind_t {
 388         INITIALIZER_VALUE,
 389         INITIALIZER_LIST,
 390         INITIALIZER_STRING,
 391         INITIALIZER_WIDE_STRING,
 392         INITIALIZER_DESIGNATOR
 393 } initializer_kind_t;
 394
 395 struct initializer_base_t {
 396         initializer_kind_t kind;
 397 };
 398
 399 struct initializer_value_t {
 400         initializer_base_t  base;
 401         expression_t       *value;
 402 };
 403
 404 struct initializer_list_t {
 405         initializer_base_t  base;
 406         size_t              len;
 407         initializer_t      *initializers[];
 408 };
 409
 410 struct initializer_string_t {
 411         initializer_base_t base;
 412         string_t           string;
 413 };
 414
 415 struct initializer_wide_string_t {
 416         initializer_base_t  base;
 417         wide_string_t       string;
 418 };
 419
 420 struct initializer_designator_t {
 421         initializer_base_t  base;
 422         designator_t       *designator;
 423 };
 424
 425 union initializer_t {
 426         initializer_kind_t        kind;
 427         initializer_base_t        base;
 428         initializer_value_t       value;
 429         initializer_list_t        list;
 430         initializer_string_t      string;
 431         initializer_wide_string_t wide_string;
 432         initializer_designator_t  designator;
 433 };
 434
 435 /**
 436  * GNU attributes.
 437  */
 438 typedef enum gnu_attribute_kind_t {
 439         GNU_AK_CONST,
 440         GNU_AK_VOLATILE,
 441         GNU_AK_CDECL,
 442         GNU_AK_STDCALL,
 443         GNU_AK_FASTCALL,
 444         GNU_AK_DEPRECATED,
 445         GNU_AK_NOINLINE,
 446         GNU_AK_NORETURN,
 447         GNU_AK_NAKED,
 448         GNU_AK_PURE,
 449         GNU_AK_ALWAYS_INLINE,
 450         GNU_AK_MALLOC,
 451         GNU_AK_WEAK,
 452         GNU_AK_CONSTRUCTOR,
 453         GNU_AK_DESTRUCTOR,
 454         GNU_AK_NOTHROW,
 455         GNU_AK_TRANSPARENT_UNION,
 456         GNU_AK_COMMON,
 457         GNU_AK_NOCOMMON,
 458         GNU_AK_PACKED,
 459         GNU_AK_SHARED,
 460         GNU_AK_NOTSHARED,
 461         GNU_AK_USED,
 462         GNU_AK_UNUSED,
 463         GNU_AK_NO_INSTRUMENT_FUNCTION,
 464         GNU_AK_WARN_UNUSED_RESULT,
 465         GNU_AK_LONGCALL,
 466         GNU_AK_SHORTCALL,
 467         GNU_AK_LONG_CALL,
 468         GNU_AK_SHORT_CALL,
 469         GNU_AK_FUNCTION_VECTOR,
 470         GNU_AK_INTERRUPT,
 471         GNU_AK_INTERRUPT_HANDLER,
 472         GNU_AK_NMI_HANDLER,
 473         GNU_AK_NESTING,
 474         GNU_AK_NEAR,
 475         GNU_AK_FAR,
 476         GNU_AK_SIGNAL,
 477         GNU_AK_EIGTHBIT_DATA,
 478         GNU_AK_TINY_DATA,
 479         GNU_AK_SAVEALL,
 480         GNU_AK_FLATTEN,
 481         GNU_AK_SSEREGPARM,
 482         GNU_AK_EXTERNALLY_VISIBLE,
 483         GNU_AK_RETURN_TWICE,
 484         GNU_AK_MAY_ALIAS,
 485         GNU_AK_MS_STRUCT,
 486         GNU_AK_GCC_STRUCT,
 487         GNU_AK_DLLIMPORT,
 488         GNU_AK_DLLEXPORT,
 489         GNU_AK_ALIGNED,
 490         GNU_AK_ALIAS,
 491         GNU_AK_SECTION,
 492         GNU_AK_FORMAT,
 493         GNU_AK_FORMAT_ARG,
 494         GNU_AK_WEAKREF,
 495         GNU_AK_NONNULL,
 496         GNU_AK_TLS_MODEL,
 497         GNU_AK_VISIBILITY,
 498         GNU_AK_REGPARM,
 499         GNU_AK_MODEL,
 500         GNU_AK_MODE,
 501         GNU_AK_TRAP_EXIT,
 502         GNU_AK_SP_SWITCH,
 503         GNU_AK_SENTINEL,
 504         GNU_AK_LAST
 505 } gnu_attribute_kind_t;
 506
 507 /**
 508  * Extended microsoft modifier.
 509  */
 510 typedef enum decl_modifier_t {
 511         DM_DLLIMPORT         = 1 <<  0,
 512         DM_DLLEXPORT         = 1 <<  1,
 513         DM_THREAD            = 1 <<  2,
 514         DM_NAKED             = 1 <<  3,
 515         DM_MICROSOFT_INLINE  = 1 <<  4,
 516         DM_FORCEINLINE       = 1 <<  5,
 517         DM_SELECTANY         = 1 <<  6,
 518         DM_NOTHROW           = 1 <<  7,
 519         DM_NOVTABLE          = 1 <<  8,
 520         DM_NORETURN          = 1 <<  9,
 521         DM_NOINLINE          = 1 << 10,
 522         DM_RESTRICT          = 1 << 11,
 523         DM_NOALIAS           = 1 << 12,
 524         DM_PACKED            = 1 << 13,
 525         DM_TRANSPARENT_UNION = 1 << 14,
 526         DM_PURE              = 1 << 15,
 527         DM_CONSTRUCTOR       = 1 << 16,
 528         DM_DESTRUCTOR        = 1 << 17,
 529         DM_UNUSED            = 1 << 18,
 530         DM_USED              = 1 << 19,
 531         DM_CDECL             = 1 << 20,
 532         DM_FASTCALL          = 1 << 21,
 533         DM_STDCALL           = 1 << 22,
 534         DM_THISCALL          = 1 << 23,
 535         DM_DEPRECATED        = 1 << 24
 536 } decl_modifier_t;
 537
 538 typedef unsigned decl_modifiers_t;
 539
 540 struct declaration_t {
 541         unsigned char       namespc;
 542         unsigned char       declared_storage_class;
 543         unsigned char       storage_class;
 544         unsigned char       alignment;          /**< Alignment of the declaration, 0 for default. */
 545         decl_modifiers_t    modifiers;          /**< modifiers. */
 546         const char         *deprecated_string;  /**< MS deprecated string if any. */
 547         symbol_t           *get_property_sym;   /**< MS get property. */
 548         symbol_t           *put_property_sym;   /**< MS put property. */
 549         unsigned int        address_taken : 1;  /**< Set if the address of this declaration was taken. */
 550         unsigned int        is_inline     : 1;
 551         unsigned int        used          : 1;  /**< Set if the declaration is used. */
 552         unsigned int        implicit      : 1;  /**< Set for implicit (not found in source code) declarations. */
 553         type_t             *type;
 554         il_size_t           offset;             /**< The offset of this member inside a compound. */
 555         symbol_t           *symbol;
 556         string_t           *asm_name;           /**< GCC extension: ASM label. */
 557         source_position_t   source_position;
 558         union {
 559                 bool            complete;           /**< used to indicate whether struct/union types are already defined or if just the name is declared */
 560                 statement_t    *statement;
 561                 initializer_t  *initializer;
 562                 expression_t   *enum_value;
 563         } init;
 564         scope_t             scope;              /**< The scope that this declaration opens. */
 565         scope_t            *parent_scope;       /**< The parent scope where this declaration lives. */
 566
 567         /** next declaration in a scope */
 568         declaration_t      *next;
 569         /** next declaration with same symbol */
 570         declaration_t      *symbol_next;
 571
 572         /* the following fields are used in ast2firm module */
 573         unsigned char       declaration_kind;
 574         union {
 575                 unsigned int  value_number;
 576                 ir_entity    *entity;
 577                 ir_node      *block;
 578                 ir_node      *vla_base;
 579                 tarval       *enum_val;
 580                 ir_type      *irtype;
 581         } v;
 582 };
 583
 584 typedef enum statement_kind_t {
 585         STATEMENT_INVALID,
 586         STATEMENT_EMPTY,
 587         STATEMENT_COMPOUND,
 588         STATEMENT_RETURN,
 589         STATEMENT_DECLARATION,
 590         STATEMENT_IF,
 591         STATEMENT_SWITCH,
 592         STATEMENT_EXPRESSION,
 593         STATEMENT_CONTINUE,
 594         STATEMENT_BREAK,
 595         STATEMENT_GOTO,
 596         STATEMENT_LABEL,
 597         STATEMENT_CASE_LABEL,
 598         STATEMENT_WHILE,
 599         STATEMENT_DO_WHILE,
 600         STATEMENT_FOR,
 601         STATEMENT_ASM,
 602         STATEMENT_MS_TRY,
 603         STATEMENT_LEAVE
 604 } statement_kind_t;
 605
 606 struct statement_base_t {
 607         statement_kind_t   kind;
 608         statement_t       *next;
 609         source_position_t  source_position;
 610         statement_t       *parent;
 611         bool               reachable;
 612 #ifndef NDEBUG
 613         bool               transformed;
 614 #endif
 615 };
 616
 617 struct invalid_statement_t {
 618         statement_base_t  base;
 619 };
 620
 621 struct empty_statement_t {
 622         statement_base_t  base;
 623 };
 624
 625 struct return_statement_t {
 626         statement_base_t  base;
 627         expression_t     *value;
 628 };
 629
 630 struct compound_statement_t {
 631         statement_base_t  base;
 632         statement_t      *statements;
 633         scope_t           scope;
 634 };
 635
 636 struct declaration_statement_t {
 637         statement_base_t  base;
 638         declaration_t    *declarations_begin;
 639         declaration_t    *declarations_end;
 640 };
 641
 642 struct if_statement_t {
 643         statement_base_t  base;
 644         expression_t     *condition;
 645         statement_t      *true_statement;
 646         statement_t      *false_statement;
 647 };
 648
 649 struct switch_statement_t {
 650         statement_base_t        base;
 651         expression_t           *expression;
 652         statement_t            *body;
 653         case_label_statement_t *first_case, *last_case;  /**< List of all cases, including default. */
 654         case_label_statement_t *default_label;    /**< The default label if existent. */
 655         unsigned long           default_proj_nr;  /**< The Proj-number for the default Proj. */
 656 };
 657
 658 struct goto_statement_t {
 659         statement_base_t  base;
 660         declaration_t    *label;      /**< The destination label. */
 661         expression_t     *expression; /**< The expression for an assigned goto. */
 662         goto_statement_t *next;       /**< links all goto statements of a function */
 663 };
 664
 665 struct case_label_statement_t {
 666         statement_base_t        base;
 667         expression_t           *expression;  /**< The case label expression, NULL for default label. */
 668         expression_t           *end_range;   /**< For GNUC case a .. b: the end range expression, NULL else. */
 669         case_label_statement_t *next;        /**< link to the next case label in switch */
 670         statement_t            *statement;
 671         long                   first_case;   /**< The folded value of expression. */
 672         long                   last_case;    /**< The folded value of end_range. */
 673         bool                   is_bad;       /**< If set marked as bad to supress warnings. */
 674         bool                   is_empty;     /**< If set marked this is a empty range. */
 675 };
 676
 677 struct label_statement_t {
 678         statement_base_t   base;
 679         declaration_t     *label;
 680         statement_t       *statement;
 681         label_statement_t *next;    /**< links all label statements of a function */
 682 };
 683
 684 struct expression_statement_t {
 685         statement_base_t  base;
 686         expression_t     *expression;
 687 };
 688
 689 struct while_statement_t {
 690         statement_base_t  base;
 691         expression_t     *condition;
 692         statement_t      *body;
 693 };
 694
 695 struct do_while_statement_t {
 696         statement_base_t  base;
 697         expression_t     *condition;
 698         statement_t      *body;
 699 };
 700
 701 struct for_statement_t {
 702         statement_base_t  base;
 703         expression_t     *initialisation;
 704         expression_t     *condition;
 705         expression_t     *step;
 706         statement_t      *body;
 707         scope_t           scope;
 708         bool              condition_reachable:1;
 709         bool              step_reachable:1;
 710 };
 711
 712 struct asm_argument_t {
 713         string_t        constraints;
 714         expression_t   *expression;
 715         symbol_t       *symbol;
 716         asm_argument_t *next;
 717 };
 718
 719 struct asm_clobber_t {
 720         string_t       clobber;
 721         asm_clobber_t *next;
 722 };
 723
 724 struct asm_statement_t {
 725         statement_base_t base;
 726         string_t         asm_text;
 727         asm_argument_t  *inputs;
 728         asm_argument_t  *outputs;
 729         asm_clobber_t   *clobbers;
 730         bool             is_volatile;
 731 };
 732
 733 struct ms_try_statement_t {
 734         statement_base_t  base;
 735         statement_t      *try_statement;
 736         expression_t     *except_expression; /**< non-null for except, NULL for finally */
 737         statement_t      *final_statement;
 738 };
 739
 740 struct leave_statement_t {
 741         statement_base_t  base;
 742 };
 743
 744 union statement_t {
 745         statement_kind_t         kind;
 746         statement_base_t         base;
 747         return_statement_t       returns;
 748         compound_statement_t     compound;
 749         declaration_statement_t  declaration;
 750         if_statement_t           ifs;
 751         switch_statement_t       switchs;
 752         goto_statement_t         gotos;
 753         case_label_statement_t   case_label;
 754         label_statement_t        label;
 755         expression_statement_t   expression;
 756         while_statement_t        whiles;
 757         do_while_statement_t     do_while;
 758         for_statement_t          fors;
 759         asm_statement_t          asms;
 760         ms_try_statement_t       ms_try;
 761         leave_statement_t        leave;
 762 };
 763
 764 struct translation_unit_t {
 765         scope_t      scope;
 766         statement_t *global_asm;
 767 };
 768
 769 static inline
 770 void *_allocate_ast(size_t size)
 771 {
 772         return obstack_alloc(&ast_obstack, size);
 773 }
 774
 775 static inline
 776 bool is_invalid_expression(expression_t *expression)
 777 {
 778         return expression->base.kind == EXPR_INVALID;
 779 }
 780
 781 static inline
 782 bool is_invalid_statement(statement_t *statement)
 783 {
 784         return statement->base.kind == STATEMENT_INVALID;
 785 }
 786
 787
 788 #define allocate_ast(size)                 _allocate_ast(size)
 789
 790 #endif