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   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         EXPR_LABEL_ADDRESS, /**< GCC extension &&label operator */
  65
  66         EXPR_UNARY_FIRST,
  67         EXPR_UNARY_NEGATE = EXPR_UNARY_FIRST,
  68         EXPR_UNARY_PLUS,
  69         EXPR_UNARY_BITWISE_NEGATE,
  70         EXPR_UNARY_NOT,
  71         EXPR_UNARY_DEREFERENCE,
  72         EXPR_UNARY_TAKE_ADDRESS,
  73         EXPR_UNARY_POSTFIX_INCREMENT,
  74         EXPR_UNARY_POSTFIX_DECREMENT,
  75         EXPR_UNARY_PREFIX_INCREMENT,
  76         EXPR_UNARY_PREFIX_DECREMENT,
  77         EXPR_UNARY_CAST,
  78         EXPR_UNARY_CAST_IMPLICIT, /**< compiler generated cast */
  79         EXPR_UNARY_ASSUME,        /**< MS __assume() */
  80         EXPR_UNARY_LAST = EXPR_UNARY_ASSUME,
  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 funcname_kind_t {
 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
 186 /**
 187  * A scope containing declarations.
 188  */
 189 struct scope_t {
 190         declaration_t *declarations;      /**< List of declarations in this scope. */
 191         declaration_t *last_declaration;  /**< last declaration in this scope. */
 192 };
 193
 194 struct expression_base_t {
 195         expression_kind_t   kind;
 196         type_t             *type;
 197         source_position_t   source_position;
 198 #ifndef NDEBUG
 199         bool                transformed;
 200 #endif
 201 };
 202
 203 struct const_expression_t {
 204         expression_base_t  base;
 205         union {
 206                 long long      int_value;
 207                 long double    float_value;
 208                 string_t       character;
 209                 wide_string_t  wide_character;
 210         } v;
 211         bool               is_ms_noop;  /**< True, if this constant is the result
 212                                              of an microsoft __noop operator */
 213 };
 214
 215 struct string_literal_expression_t {
 216         expression_base_t  base;
 217         string_t           value;
 218 };
 219
 220 struct funcname_expression_t {
 221         expression_base_t  base;
 222         funcname_kind_t    kind;
 223         string_t           value;     /**< the value once assigned. */
 224 };
 225
 226 struct wide_string_literal_expression_t {
 227         expression_base_t  base;
 228         wide_string_t      value;
 229 };
 230
 231 struct compound_literal_expression_t {
 232         expression_base_t  base;
 233         type_t            *type;
 234         initializer_t     *initializer;
 235 };
 236
 237 struct builtin_symbol_expression_t {
 238         expression_base_t  base;
 239         symbol_t          *symbol;
 240 };
 241
 242 struct builtin_constant_expression_t {
 243         expression_base_t  base;
 244         expression_t      *value;
 245 };
 246
 247 struct builtin_prefetch_expression_t {
 248         expression_base_t  base;
 249         expression_t      *adr;
 250         expression_t      *rw;
 251         expression_t      *locality;
 252 };
 253
 254 struct reference_expression_t {
 255         expression_base_t  base;
 256         declaration_t     *declaration;
 257 };
 258
 259 struct call_argument_t {
 260         expression_t    *expression;
 261         call_argument_t *next;
 262 };
 263
 264 struct call_expression_t {
 265         expression_base_t  base;
 266         expression_t      *function;
 267         call_argument_t   *arguments;
 268 };
 269
 270 struct unary_expression_t {
 271         expression_base_t  base;
 272         expression_t      *value;
 273 };
 274
 275 struct binary_expression_t {
 276         expression_base_t  base;
 277         expression_t      *left;
 278         expression_t      *right;
 279 };
 280
 281 struct select_expression_t {
 282         expression_base_t  base;
 283         expression_t      *compound;
 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 struct label_address_expression_t {
 342         expression_base_t  base;
 343         declaration_t     *declaration;
 344 };
 345
 346 union expression_t {
 347         expression_kind_t                kind;
 348         expression_base_t                base;
 349         const_expression_t               conste;
 350         funcname_expression_t            funcname;
 351         string_literal_expression_t      string;
 352         wide_string_literal_expression_t wide_string;
 353         compound_literal_expression_t    compound_literal;
 354         builtin_symbol_expression_t      builtin_symbol;
 355         builtin_constant_expression_t    builtin_constant;
 356         builtin_prefetch_expression_t    builtin_prefetch;
 357         reference_expression_t           reference;
 358         call_expression_t                call;
 359         unary_expression_t               unary;
 360         binary_expression_t              binary;
 361         select_expression_t              select;
 362         array_access_expression_t        array_access;
 363         typeprop_expression_t            typeprop;
 364         offsetof_expression_t            offsetofe;
 365         va_start_expression_t            va_starte;
 366         va_arg_expression_t              va_arge;
 367         conditional_expression_t         conditional;
 368         statement_expression_t           statement;
 369         classify_type_expression_t       classify_type;
 370         label_address_expression_t       label_address;
 371 };
 372
 373 typedef enum storage_class_tag_t {
 374         STORAGE_CLASS_NONE,
 375         STORAGE_CLASS_EXTERN,
 376         STORAGE_CLASS_STATIC,
 377         STORAGE_CLASS_TYPEDEF,
 378         STORAGE_CLASS_AUTO,
 379         STORAGE_CLASS_REGISTER,
 380         STORAGE_CLASS_ENUM_ENTRY,
 381         STORAGE_CLASS_THREAD,
 382         STORAGE_CLASS_THREAD_EXTERN,
 383         STORAGE_CLASS_THREAD_STATIC,
 384 } storage_class_tag_t;
 385
 386 typedef enum namespace_t {
 387         NAMESPACE_NORMAL,
 388         NAMESPACE_STRUCT,
 389         NAMESPACE_UNION,
 390         NAMESPACE_ENUM,
 391         NAMESPACE_LABEL,
 392 } namespace_t;
 393
 394 typedef enum initializer_kind_t {
 395         INITIALIZER_VALUE,
 396         INITIALIZER_LIST,
 397         INITIALIZER_STRING,
 398         INITIALIZER_WIDE_STRING,
 399         INITIALIZER_DESIGNATOR
 400 } initializer_kind_t;
 401
 402 struct initializer_base_t {
 403         initializer_kind_t kind;
 404 };
 405
 406 struct initializer_value_t {
 407         initializer_base_t  base;
 408         expression_t       *value;
 409 };
 410
 411 struct initializer_list_t {
 412         initializer_base_t  base;
 413         size_t              len;
 414         initializer_t      *initializers[];
 415 };
 416
 417 struct initializer_string_t {
 418         initializer_base_t base;
 419         string_t           string;
 420 };
 421
 422 struct initializer_wide_string_t {
 423         initializer_base_t  base;
 424         wide_string_t       string;
 425 };
 426
 427 struct initializer_designator_t {
 428         initializer_base_t  base;
 429         designator_t       *designator;
 430 };
 431
 432 union initializer_t {
 433         initializer_kind_t        kind;
 434         initializer_base_t        base;
 435         initializer_value_t       value;
 436         initializer_list_t        list;
 437         initializer_string_t      string;
 438         initializer_wide_string_t wide_string;
 439         initializer_designator_t  designator;
 440 };
 441
 442 /**
 443  * GNU attributes.
 444  */
 445 typedef enum gnu_attribute_kind_t {
 446         GNU_AK_CONST,
 447         GNU_AK_VOLATILE,
 448         GNU_AK_CDECL,
 449         GNU_AK_STDCALL,
 450         GNU_AK_FASTCALL,
 451         GNU_AK_DEPRECATED,
 452         GNU_AK_NOINLINE,
 453         GNU_AK_NORETURN,
 454         GNU_AK_NAKED,
 455         GNU_AK_PURE,
 456         GNU_AK_ALWAYS_INLINE,
 457         GNU_AK_MALLOC,
 458         GNU_AK_WEAK,
 459         GNU_AK_CONSTRUCTOR,
 460         GNU_AK_DESTRUCTOR,
 461         GNU_AK_NOTHROW,
 462         GNU_AK_TRANSPARENT_UNION,
 463         GNU_AK_COMMON,
 464         GNU_AK_NOCOMMON,
 465         GNU_AK_PACKED,
 466         GNU_AK_SHARED,
 467         GNU_AK_NOTSHARED,
 468         GNU_AK_USED,
 469         GNU_AK_UNUSED,
 470         GNU_AK_NO_INSTRUMENT_FUNCTION,
 471         GNU_AK_WARN_UNUSED_RESULT,
 472         GNU_AK_LONGCALL,
 473         GNU_AK_SHORTCALL,
 474         GNU_AK_LONG_CALL,
 475         GNU_AK_SHORT_CALL,
 476         GNU_AK_FUNCTION_VECTOR,
 477         GNU_AK_INTERRUPT,
 478         GNU_AK_INTERRUPT_HANDLER,
 479         GNU_AK_NMI_HANDLER,
 480         GNU_AK_NESTING,
 481         GNU_AK_NEAR,
 482         GNU_AK_FAR,
 483         GNU_AK_SIGNAL,
 484         GNU_AK_EIGTHBIT_DATA,
 485         GNU_AK_TINY_DATA,
 486         GNU_AK_SAVEALL,
 487         GNU_AK_FLATTEN,
 488         GNU_AK_SSEREGPARM,
 489         GNU_AK_EXTERNALLY_VISIBLE,
 490         GNU_AK_RETURN_TWICE,
 491         GNU_AK_MAY_ALIAS,
 492         GNU_AK_MS_STRUCT,
 493         GNU_AK_GCC_STRUCT,
 494         GNU_AK_DLLIMPORT,
 495         GNU_AK_DLLEXPORT,
 496         GNU_AK_ALIGNED,
 497         GNU_AK_ALIAS,
 498         GNU_AK_SECTION,
 499         GNU_AK_FORMAT,
 500         GNU_AK_FORMAT_ARG,
 501         GNU_AK_WEAKREF,
 502         GNU_AK_NONNULL,
 503         GNU_AK_TLS_MODEL,
 504         GNU_AK_VISIBILITY,
 505         GNU_AK_REGPARM,
 506         GNU_AK_MODEL,
 507         GNU_AK_MODE,
 508         GNU_AK_TRAP_EXIT,
 509         GNU_AK_SP_SWITCH,
 510         GNU_AK_SENTINEL,
 511         GNU_AK_LAST
 512 } gnu_attribute_kind_t;
 513
 514 /**
 515  * Extended microsoft modifier.
 516  */
 517 typedef enum decl_modifier_t {
 518         DM_DLLIMPORT         = 1 <<  0,
 519         DM_DLLEXPORT         = 1 <<  1,
 520         DM_THREAD            = 1 <<  2,
 521         DM_NAKED             = 1 <<  3,
 522         DM_MICROSOFT_INLINE  = 1 <<  4,
 523         DM_FORCEINLINE       = 1 <<  5,
 524         DM_SELECTANY         = 1 <<  6,
 525         DM_NOTHROW           = 1 <<  7,
 526         DM_NOVTABLE          = 1 <<  8,
 527         DM_NORETURN          = 1 <<  9,
 528         DM_NOINLINE          = 1 << 10,
 529         DM_RESTRICT          = 1 << 11,
 530         DM_NOALIAS           = 1 << 12,
 531         DM_PACKED            = 1 << 13,
 532         DM_TRANSPARENT_UNION = 1 << 14,
 533         DM_PURE              = 1 << 15,
 534         DM_CONSTRUCTOR       = 1 << 16,
 535         DM_DESTRUCTOR        = 1 << 17,
 536         DM_UNUSED            = 1 << 18,
 537         DM_USED              = 1 << 19,
 538         DM_CDECL             = 1 << 20,
 539         DM_FASTCALL          = 1 << 21,
 540         DM_STDCALL           = 1 << 22,
 541         DM_THISCALL          = 1 << 23,
 542         DM_DEPRECATED        = 1 << 24
 543 } decl_modifier_t;
 544
 545 typedef unsigned decl_modifiers_t;
 546
 547 struct declaration_t {
 548         unsigned char       namespc;
 549         unsigned char       declared_storage_class;
 550         unsigned char       storage_class;
 551         unsigned char       alignment;          /**< Alignment of the declaration, 0 for default. */
 552         decl_modifiers_t    modifiers;          /**< modifiers. */
 553         const char         *deprecated_string;  /**< MS deprecated string if any. */
 554         symbol_t           *get_property_sym;   /**< MS get property. */
 555         symbol_t           *put_property_sym;   /**< MS put property. */
 556         unsigned int        address_taken : 1;  /**< Set if the address of this declaration was taken. */
 557         unsigned int        is_inline     : 1;
 558         unsigned int        used          : 1;  /**< Set if the declaration is used. */
 559         unsigned int        implicit      : 1;  /**< Set for implicit (not found in source code) declarations. */
 560         type_t             *type;
 561         il_size_t           offset;             /**< The offset of this member inside a compound. */
 562         symbol_t           *symbol;
 563         string_t           *asm_name;           /**< GCC extension: ASM label. */
 564         source_position_t   source_position;
 565         union {
 566                 bool            complete;           /**< used to indicate whether struct/union types are already defined or if just the name is declared */
 567                 statement_t    *statement;
 568                 initializer_t  *initializer;
 569                 expression_t   *enum_value;
 570         } init;
 571         scope_t             scope;              /**< The scope that this declaration opens. */
 572         scope_t            *parent_scope;       /**< The parent scope where this declaration lives. */
 573
 574         /** next declaration in a scope */
 575         declaration_t      *next;
 576         /** next declaration with same symbol */
 577         declaration_t      *symbol_next;
 578
 579         /* the following fields are used in ast2firm module */
 580         unsigned char       declaration_kind;
 581         union {
 582                 unsigned int  value_number;
 583                 ir_entity    *entity;
 584                 ir_node      *block;
 585                 ir_node      *vla_base;
 586                 tarval       *enum_val;
 587                 ir_type      *irtype;
 588         } v;
 589 };
 590
 591 typedef enum statement_kind_t {
 592         STATEMENT_INVALID,
 593         STATEMENT_EMPTY,
 594         STATEMENT_COMPOUND,
 595         STATEMENT_RETURN,
 596         STATEMENT_DECLARATION,
 597         STATEMENT_IF,
 598         STATEMENT_SWITCH,
 599         STATEMENT_EXPRESSION,
 600         STATEMENT_CONTINUE,
 601         STATEMENT_BREAK,
 602         STATEMENT_GOTO,
 603         STATEMENT_LABEL,
 604         STATEMENT_CASE_LABEL,
 605         STATEMENT_WHILE,
 606         STATEMENT_DO_WHILE,
 607         STATEMENT_FOR,
 608         STATEMENT_ASM,
 609         STATEMENT_MS_TRY,
 610         STATEMENT_LEAVE
 611 } statement_kind_t;
 612
 613 struct statement_base_t {
 614         statement_kind_t   kind;
 615         statement_t       *next;
 616         source_position_t  source_position;
 617         statement_t       *parent;
 618         bool               reachable;
 619 #ifndef NDEBUG
 620         bool               transformed;
 621 #endif
 622 };
 623
 624 struct invalid_statement_t {
 625         statement_base_t  base;
 626 };
 627
 628 struct empty_statement_t {
 629         statement_base_t  base;
 630 };
 631
 632 struct return_statement_t {
 633         statement_base_t  base;
 634         expression_t     *value;
 635 };
 636
 637 struct compound_statement_t {
 638         statement_base_t  base;
 639         statement_t      *statements;
 640         scope_t           scope;
 641 };
 642
 643 struct declaration_statement_t {
 644         statement_base_t  base;
 645         declaration_t    *declarations_begin;
 646         declaration_t    *declarations_end;
 647 };
 648
 649 struct if_statement_t {
 650         statement_base_t  base;
 651         expression_t     *condition;
 652         statement_t      *true_statement;
 653         statement_t      *false_statement;
 654 };
 655
 656 struct switch_statement_t {
 657         statement_base_t        base;
 658         expression_t           *expression;
 659         statement_t            *body;
 660         case_label_statement_t *first_case, *last_case;  /**< List of all cases, including default. */
 661         case_label_statement_t *default_label;    /**< The default label if existent. */
 662         unsigned long           default_proj_nr;  /**< The Proj-number for the default Proj. */
 663 };
 664
 665 struct goto_statement_t {
 666         statement_base_t  base;
 667         declaration_t    *label;      /**< The destination label. */
 668         expression_t     *expression; /**< The expression for an assigned goto. */
 669         goto_statement_t *next;       /**< links all goto statements of a function */
 670 };
 671
 672 struct case_label_statement_t {
 673         statement_base_t        base;
 674         expression_t           *expression;  /**< The case label expression, NULL for default label. */
 675         expression_t           *end_range;   /**< For GNUC case a .. b: the end range expression, NULL else. */
 676         case_label_statement_t *next;        /**< link to the next case label in switch */
 677         statement_t            *statement;
 678         long                   first_case;   /**< The folded value of expression. */
 679         long                   last_case;    /**< The folded value of end_range. */
 680         bool                   is_bad;       /**< If set marked as bad to supress warnings. */
 681         bool                   is_empty;     /**< If set marked this is a empty range. */
 682 };
 683
 684 struct label_statement_t {
 685         statement_base_t   base;
 686         declaration_t     *label;
 687         statement_t       *statement;
 688         label_statement_t *next;    /**< links all label statements of a function */
 689 };
 690
 691 struct expression_statement_t {
 692         statement_base_t  base;
 693         expression_t     *expression;
 694 };
 695
 696 struct while_statement_t {
 697         statement_base_t  base;
 698         expression_t     *condition;
 699         statement_t      *body;
 700 };
 701
 702 struct do_while_statement_t {
 703         statement_base_t  base;
 704         expression_t     *condition;
 705         statement_t      *body;
 706 };
 707
 708 struct for_statement_t {
 709         statement_base_t  base;
 710         expression_t     *initialisation;
 711         expression_t     *condition;
 712         expression_t     *step;
 713         statement_t      *body;
 714         scope_t           scope;
 715         bool              condition_reachable:1;
 716         bool              step_reachable:1;
 717 };
 718
 719 struct asm_argument_t {
 720         string_t        constraints;
 721         expression_t   *expression;
 722         symbol_t       *symbol;
 723         asm_argument_t *next;
 724 };
 725
 726 struct asm_clobber_t {
 727         string_t       clobber;
 728         asm_clobber_t *next;
 729 };
 730
 731 struct asm_statement_t {
 732         statement_base_t base;
 733         string_t         asm_text;
 734         asm_argument_t  *inputs;
 735         asm_argument_t  *outputs;
 736         asm_clobber_t   *clobbers;
 737         bool             is_volatile;
 738 };
 739
 740 struct ms_try_statement_t {
 741         statement_base_t  base;
 742         statement_t      *try_statement;
 743         expression_t     *except_expression; /**< non-null for except, NULL for finally */
 744         statement_t      *final_statement;
 745 };
 746
 747 struct leave_statement_t {
 748         statement_base_t  base;
 749 };
 750
 751 union statement_t {
 752         statement_kind_t         kind;
 753         statement_base_t         base;
 754         return_statement_t       returns;
 755         compound_statement_t     compound;
 756         declaration_statement_t  declaration;
 757         if_statement_t           ifs;
 758         switch_statement_t       switchs;
 759         goto_statement_t         gotos;
 760         case_label_statement_t   case_label;
 761         label_statement_t        label;
 762         expression_statement_t   expression;
 763         while_statement_t        whiles;
 764         do_while_statement_t     do_while;
 765         for_statement_t          fors;
 766         asm_statement_t          asms;
 767         ms_try_statement_t       ms_try;
 768         leave_statement_t        leave;
 769 };
 770
 771 struct translation_unit_t {
 772         scope_t      scope;
 773         statement_t *global_asm;
 774 };
 775
 776 static inline
 777 void *_allocate_ast(size_t size)
 778 {
 779         return obstack_alloc(&ast_obstack, size);
 780 }
 781
 782 static inline
 783 bool is_invalid_expression(expression_t *expression)
 784 {
 785         return expression->base.kind == EXPR_INVALID;
 786 }
 787
 788 static inline
 789 bool is_invalid_statement(statement_t *statement)
 790 {
 791         return statement->base.kind == STATEMENT_INVALID;
 792 }
 793
 794
 795 #define allocate_ast(size)                 _allocate_ast(size)
 796
 797 #endif