gcc/fortran/gfortran.h

   1 /* gfortran header file
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   3    Free Software Foundation, Inc.
   4    Contributed by Andy Vaught
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef GCC_GFORTRAN_H
  23 #define GCC_GFORTRAN_H
  24
  25 /* It's probably insane to have this large of a header file, but it
  26    seemed like everything had to be recompiled anyway when a change
  27    was made to a header file, and there were ordering issues with
  28    multiple header files.  Besides, Microsoft's winnt.h was 250k last
  29    time I looked, so by comparison this is perfectly reasonable.  */
  30
  31 /* Declarations common to the front-end and library are put in
  32    libgfortran/libgfortran_frontend.h  */
  33 #include "libgfortran.h"
  34
  35
  36 #include "system.h"
  37 #include "intl.h"
  38 #include "coretypes.h"
  39 #include "input.h"
  40 #include "splay-tree.h"
  41 /* The following ifdefs are recommended by the autoconf documentation
  42    for any code using alloca.  */
  43
  44 /* AIX requires this to be the first thing in the file.  */
  45 #ifdef __GNUC__
  46 #else /* not __GNUC__ */
  47 #ifdef HAVE_ALLOCA_H
  48 #include <alloca.h>
  49 #else /* do not HAVE_ALLOCA_H */
  50 #ifdef _AIX
  51 #pragma alloca
  52 #else
  53 #ifndef alloca                  /* predefined by HP cc +Olibcalls */
  54 char *alloca ();
  55 #endif /* not predefined */
  56 #endif /* not _AIX */
  57 #endif /* do not HAVE_ALLOCA_H */
  58 #endif /* not __GNUC__ */
  59
  60 /* Major control parameters.  */
  61
  62 #define GFC_MAX_SYMBOL_LEN 63   /* Must be at least 63 for F2003.  */
  63 #define GFC_MAX_BINDING_LABEL_LEN 126 /* (2 * GFC_MAX_SYMBOL_LEN) */
  64 #define GFC_MAX_LINE 132        /* Characters beyond this are not seen.  */
  65 #define GFC_LETTERS 26          /* Number of letters in the alphabet.  */
  66
  67 #define MAX_SUBRECORD_LENGTH 2147483639   /* 2**31-9 */
  68
  69
  70 #define free(x) Use_gfc_free_instead_of_free()
  71 #define gfc_is_whitespace(c) ((c==' ') || (c=='\t'))
  72
  73 #ifndef NULL
  74 #define NULL ((void *) 0)
  75 #endif
  76
  77 /* Stringization.  */
  78 #define stringize(x) expand_macro(x)
  79 #define expand_macro(x) # x
  80
  81 /* For the runtime library, a standard prefix is a requirement to
  82    avoid cluttering the namespace with things nobody asked for.  It's
  83    ugly to look at and a pain to type when you add the prefix by hand,
  84    so we hide it behind a macro.  */
  85 #define PREFIX(x) "_gfortran_" x
  86 #define PREFIX_LEN 10
  87
  88 #define BLANK_COMMON_NAME "__BLNK__"
  89
  90 /* Macro to initialize an mstring structure.  */
  91 #define minit(s, t) { s, NULL, t }
  92
  93 /* Structure for storing strings to be matched by gfc_match_string.  */
  94 typedef struct
  95 {
  96   const char *string;
  97   const char *mp;
  98   int tag;
  99 }
 100 mstring;
 101
 102
 103
 104 /*************************** Enums *****************************/
 105
 106 /* Used when matching and resolving data I/O transfer statements.  */
 107
 108 typedef enum
 109 { M_READ, M_WRITE, M_PRINT, M_INQUIRE }
 110 io_kind;
 111
 112 /* The author remains confused to this day about the convention of
 113    returning '0' for 'SUCCESS'... or was it the other way around?  The
 114    following enum makes things much more readable.  We also start
 115    values off at one instead of zero.  */
 116
 117 typedef enum
 118 { SUCCESS = 1, FAILURE }
 119 gfc_try;
 120
 121 /* This is returned by gfc_notification_std to know if, given the flags
 122    that were given (-std=, -pedantic) we should issue an error, a warning
 123    or nothing.  */
 124
 125 typedef enum
 126 { SILENT, WARNING, ERROR }
 127 notification;
 128
 129 /* Matchers return one of these three values.  The difference between
 130    MATCH_NO and MATCH_ERROR is that MATCH_ERROR means that a match was
 131    successful, but that something non-syntactic is wrong and an error
 132    has already been issued.  */
 133
 134 typedef enum
 135 { MATCH_NO = 1, MATCH_YES, MATCH_ERROR }
 136 match;
 137
 138 typedef enum
 139 { FORM_FREE, FORM_FIXED, FORM_UNKNOWN }
 140 gfc_source_form;
 141
 142 /* Basic types.  BT_VOID is used by ISO C Binding so funcs like c_f_pointer
 143    can take any arg with the pointer attribute as a param.  */
 144 typedef enum
 145 { BT_UNKNOWN = 1, BT_INTEGER, BT_REAL, BT_COMPLEX,
 146   BT_LOGICAL, BT_CHARACTER, BT_DERIVED, BT_PROCEDURE, BT_HOLLERITH,
 147   BT_VOID
 148 }
 149 bt;
 150
 151 /* Expression node types.  */
 152 typedef enum
 153 { EXPR_OP = 1, EXPR_FUNCTION, EXPR_CONSTANT, EXPR_VARIABLE,
 154   EXPR_SUBSTRING, EXPR_STRUCTURE, EXPR_ARRAY, EXPR_NULL, EXPR_COMPCALL
 155 }
 156 expr_t;
 157
 158 /* Array types.  */
 159 typedef enum
 160 { AS_EXPLICIT = 1, AS_ASSUMED_SHAPE, AS_DEFERRED,
 161   AS_ASSUMED_SIZE, AS_UNKNOWN
 162 }
 163 array_type;
 164
 165 typedef enum
 166 { AR_FULL = 1, AR_ELEMENT, AR_SECTION, AR_UNKNOWN }
 167 ar_type;
 168
 169 /* Statement label types.  */
 170 typedef enum
 171 { ST_LABEL_UNKNOWN = 1, ST_LABEL_TARGET,
 172   ST_LABEL_BAD_TARGET, ST_LABEL_FORMAT
 173 }
 174 gfc_sl_type;
 175
 176 /* Intrinsic operators.  */
 177 typedef enum
 178 { GFC_INTRINSIC_BEGIN = 0,
 179   INTRINSIC_NONE = -1, INTRINSIC_UPLUS = GFC_INTRINSIC_BEGIN,
 180   INTRINSIC_UMINUS, INTRINSIC_PLUS, INTRINSIC_MINUS, INTRINSIC_TIMES,
 181   INTRINSIC_DIVIDE, INTRINSIC_POWER, INTRINSIC_CONCAT,
 182   INTRINSIC_AND, INTRINSIC_OR, INTRINSIC_EQV, INTRINSIC_NEQV,
 183   /* ==, /=, >, >=, <, <=  */
 184   INTRINSIC_EQ, INTRINSIC_NE, INTRINSIC_GT, INTRINSIC_GE,
 185   INTRINSIC_LT, INTRINSIC_LE,
 186   /* .EQ., .NE., .GT., .GE., .LT., .LE. (OS = Old-Style)  */
 187   INTRINSIC_EQ_OS, INTRINSIC_NE_OS, INTRINSIC_GT_OS, INTRINSIC_GE_OS,
 188   INTRINSIC_LT_OS, INTRINSIC_LE_OS,
 189   INTRINSIC_NOT, INTRINSIC_USER, INTRINSIC_ASSIGN,
 190   INTRINSIC_PARENTHESES, GFC_INTRINSIC_END /* Sentinel */
 191 }
 192 gfc_intrinsic_op;
 193
 194
 195 /* This macro is the number of intrinsic operators that exist.
 196    Assumptions are made about the numbering of the interface_op enums.  */
 197 #define GFC_INTRINSIC_OPS GFC_INTRINSIC_END
 198
 199 /* Arithmetic results.  */
 200 typedef enum
 201 { ARITH_OK = 1, ARITH_OVERFLOW, ARITH_UNDERFLOW, ARITH_NAN,
 202   ARITH_DIV0, ARITH_INCOMMENSURATE, ARITH_ASYMMETRIC, ARITH_PROHIBIT
 203 }
 204 arith;
 205
 206 /* Statements.  */
 207 typedef enum
 208 {
 209   ST_ARITHMETIC_IF, ST_ALLOCATE, ST_ATTR_DECL, ST_BACKSPACE, ST_BLOCK_DATA,
 210   ST_CALL, ST_CASE, ST_CLOSE, ST_COMMON, ST_CONTINUE, ST_CONTAINS, ST_CYCLE,
 211   ST_DATA, ST_DATA_DECL, ST_DEALLOCATE, ST_DO, ST_ELSE, ST_ELSEIF,
 212   ST_ELSEWHERE, ST_END_BLOCK_DATA, ST_ENDDO, ST_IMPLIED_ENDDO,
 213   ST_END_FILE, ST_FINAL, ST_FLUSH, ST_END_FORALL, ST_END_FUNCTION, ST_ENDIF,
 214   ST_END_INTERFACE, ST_END_MODULE, ST_END_PROGRAM, ST_END_SELECT,
 215   ST_END_SUBROUTINE, ST_END_WHERE, ST_END_TYPE, ST_ENTRY, ST_EQUIVALENCE,
 216   ST_EXIT, ST_FORALL, ST_FORALL_BLOCK, ST_FORMAT, ST_FUNCTION, ST_GOTO,
 217   ST_IF_BLOCK, ST_IMPLICIT, ST_IMPLICIT_NONE, ST_IMPORT, ST_INQUIRE, ST_INTERFACE,
 218   ST_PARAMETER, ST_MODULE, ST_MODULE_PROC, ST_NAMELIST, ST_NULLIFY, ST_OPEN,
 219   ST_PAUSE, ST_PRIVATE, ST_PROGRAM, ST_PUBLIC, ST_READ, ST_RETURN, ST_REWIND,
 220   ST_STOP, ST_SUBROUTINE, ST_TYPE, ST_USE, ST_WHERE_BLOCK, ST_WHERE, ST_WAIT,
 221   ST_WRITE, ST_ASSIGNMENT, ST_POINTER_ASSIGNMENT, ST_SELECT_CASE, ST_SEQUENCE,
 222   ST_SIMPLE_IF, ST_STATEMENT_FUNCTION, ST_DERIVED_DECL, ST_LABEL_ASSIGNMENT,
 223   ST_ENUM, ST_ENUMERATOR, ST_END_ENUM,
 224   ST_OMP_ATOMIC, ST_OMP_BARRIER, ST_OMP_CRITICAL, ST_OMP_END_CRITICAL,
 225   ST_OMP_END_DO, ST_OMP_END_MASTER, ST_OMP_END_ORDERED, ST_OMP_END_PARALLEL,
 226   ST_OMP_END_PARALLEL_DO, ST_OMP_END_PARALLEL_SECTIONS,
 227   ST_OMP_END_PARALLEL_WORKSHARE, ST_OMP_END_SECTIONS, ST_OMP_END_SINGLE,
 228   ST_OMP_END_WORKSHARE, ST_OMP_DO, ST_OMP_FLUSH, ST_OMP_MASTER, ST_OMP_ORDERED,
 229   ST_OMP_PARALLEL, ST_OMP_PARALLEL_DO, ST_OMP_PARALLEL_SECTIONS,
 230   ST_OMP_PARALLEL_WORKSHARE, ST_OMP_SECTIONS, ST_OMP_SECTION, ST_OMP_SINGLE,
 231   ST_OMP_THREADPRIVATE, ST_OMP_WORKSHARE, ST_OMP_TASK, ST_OMP_END_TASK,
 232   ST_OMP_TASKWAIT, ST_PROCEDURE, ST_GENERIC,
 233   ST_GET_FCN_CHARACTERISTICS, ST_NONE
 234 }
 235 gfc_statement;
 236
 237
 238 /* Types of interfaces that we can have.  Assignment interfaces are
 239    considered to be intrinsic operators.  */
 240 typedef enum
 241 {
 242   INTERFACE_NAMELESS = 1, INTERFACE_GENERIC,
 243   INTERFACE_INTRINSIC_OP, INTERFACE_USER_OP, INTERFACE_ABSTRACT
 244 }
 245 interface_type;
 246
 247 /* Symbol flavors: these are all mutually exclusive.
 248    10 elements = 4 bits.  */
 249 typedef enum sym_flavor
 250 {
 251   FL_UNKNOWN = 0, FL_PROGRAM, FL_BLOCK_DATA, FL_MODULE, FL_VARIABLE,
 252   FL_PARAMETER, FL_LABEL, FL_PROCEDURE, FL_DERIVED, FL_NAMELIST,
 253   FL_VOID
 254 }
 255 sym_flavor;
 256
 257 /* Procedure types.  7 elements = 3 bits.  */
 258 typedef enum procedure_type
 259 { PROC_UNKNOWN, PROC_MODULE, PROC_INTERNAL, PROC_DUMMY,
 260   PROC_INTRINSIC, PROC_ST_FUNCTION, PROC_EXTERNAL
 261 }
 262 procedure_type;
 263
 264 /* Intent types.  */
 265 typedef enum sym_intent
 266 { INTENT_UNKNOWN = 0, INTENT_IN, INTENT_OUT, INTENT_INOUT
 267 }
 268 sym_intent;
 269
 270 /* Access types.  */
 271 typedef enum gfc_access
 272 { ACCESS_UNKNOWN = 0, ACCESS_PUBLIC, ACCESS_PRIVATE
 273 }
 274 gfc_access;
 275
 276 /* Flags to keep track of where an interface came from.
 277    4 elements = 2 bits.  */
 278 typedef enum ifsrc
 279 { IFSRC_UNKNOWN = 0, IFSRC_DECL, IFSRC_IFBODY, IFSRC_USAGE
 280 }
 281 ifsrc;
 282
 283 /* Whether a SAVE attribute was set explicitly or implicitly.  */
 284 typedef enum save_state
 285 { SAVE_NONE = 0, SAVE_EXPLICIT, SAVE_IMPLICIT
 286 }
 287 save_state;
 288
 289 /* Strings for all symbol attributes.  We use these for dumping the
 290    parse tree, in error messages, and also when reading and writing
 291    modules.  In symbol.c.  */
 292 extern const mstring flavors[];
 293 extern const mstring procedures[];
 294 extern const mstring intents[];
 295 extern const mstring access_types[];
 296 extern const mstring ifsrc_types[];
 297 extern const mstring save_status[];
 298
 299 /* Enumeration of all the generic intrinsic functions.  Used by the
 300    backend for identification of a function.  */
 301
 302 enum gfc_isym_id
 303 {
 304   /* GFC_ISYM_NONE is used for intrinsics which will never be seen by
 305      the backend (e.g. KIND).  */
 306   GFC_ISYM_NONE = 0,
 307   GFC_ISYM_ABORT,
 308   GFC_ISYM_ABS,
 309   GFC_ISYM_ACCESS,
 310   GFC_ISYM_ACHAR,
 311   GFC_ISYM_ACOS,
 312   GFC_ISYM_ACOSH,
 313   GFC_ISYM_ADJUSTL,
 314   GFC_ISYM_ADJUSTR,
 315   GFC_ISYM_AIMAG,
 316   GFC_ISYM_AINT,
 317   GFC_ISYM_ALARM,
 318   GFC_ISYM_ALL,
 319   GFC_ISYM_ALLOCATED,
 320   GFC_ISYM_AND,
 321   GFC_ISYM_ANINT,
 322   GFC_ISYM_ANY,
 323   GFC_ISYM_ASIN,
 324   GFC_ISYM_ASINH,
 325   GFC_ISYM_ASSOCIATED,
 326   GFC_ISYM_ATAN,
 327   GFC_ISYM_ATAN2,
 328   GFC_ISYM_ATANH,
 329   GFC_ISYM_BIT_SIZE,
 330   GFC_ISYM_BTEST,
 331   GFC_ISYM_CEILING,
 332   GFC_ISYM_CHAR,
 333   GFC_ISYM_CHDIR,
 334   GFC_ISYM_CHMOD,
 335   GFC_ISYM_CMPLX,
 336   GFC_ISYM_COMMAND_ARGUMENT_COUNT,
 337   GFC_ISYM_COMPLEX,
 338   GFC_ISYM_CONJG,
 339   GFC_ISYM_CONVERSION,
 340   GFC_ISYM_COS,
 341   GFC_ISYM_COSH,
 342   GFC_ISYM_COUNT,
 343   GFC_ISYM_CPU_TIME,
 344   GFC_ISYM_CSHIFT,
 345   GFC_ISYM_CTIME,
 346   GFC_ISYM_DATE_AND_TIME,
 347   GFC_ISYM_DBLE,
 348   GFC_ISYM_DIGITS,
 349   GFC_ISYM_DIM,
 350   GFC_ISYM_DOT_PRODUCT,
 351   GFC_ISYM_DPROD,
 352   GFC_ISYM_DTIME,
 353   GFC_ISYM_EOSHIFT,
 354   GFC_ISYM_EPSILON,
 355   GFC_ISYM_ERF,
 356   GFC_ISYM_ERFC,
 357   GFC_ISYM_ERFC_SCALED,
 358   GFC_ISYM_ETIME,
 359   GFC_ISYM_EXIT,
 360   GFC_ISYM_EXP,
 361   GFC_ISYM_EXPONENT,
 362   GFC_ISYM_FDATE,
 363   GFC_ISYM_FGET,
 364   GFC_ISYM_FGETC,
 365   GFC_ISYM_FLOOR,
 366   GFC_ISYM_FLUSH,
 367   GFC_ISYM_FNUM,
 368   GFC_ISYM_FPUT,
 369   GFC_ISYM_FPUTC,
 370   GFC_ISYM_FRACTION,
 371   GFC_ISYM_FREE,
 372   GFC_ISYM_FSEEK,
 373   GFC_ISYM_FSTAT,
 374   GFC_ISYM_FTELL,
 375   GFC_ISYM_GAMMA,
 376   GFC_ISYM_GERROR,
 377   GFC_ISYM_GETARG,
 378   GFC_ISYM_GET_COMMAND,
 379   GFC_ISYM_GET_COMMAND_ARGUMENT,
 380   GFC_ISYM_GETCWD,
 381   GFC_ISYM_GETENV,
 382   GFC_ISYM_GET_ENVIRONMENT_VARIABLE,
 383   GFC_ISYM_GETGID,
 384   GFC_ISYM_GETLOG,
 385   GFC_ISYM_GETPID,
 386   GFC_ISYM_GETUID,
 387   GFC_ISYM_GMTIME,
 388   GFC_ISYM_HOSTNM,
 389   GFC_ISYM_HUGE,
 390   GFC_ISYM_HYPOT,
 391   GFC_ISYM_IACHAR,
 392   GFC_ISYM_IAND,
 393   GFC_ISYM_IARGC,
 394   GFC_ISYM_IBCLR,
 395   GFC_ISYM_IBITS,
 396   GFC_ISYM_IBSET,
 397   GFC_ISYM_ICHAR,
 398   GFC_ISYM_IDATE,
 399   GFC_ISYM_IEOR,
 400   GFC_ISYM_IERRNO,
 401   GFC_ISYM_INDEX,
 402   GFC_ISYM_INT,
 403   GFC_ISYM_INT2,
 404   GFC_ISYM_INT8,
 405   GFC_ISYM_IOR,
 406   GFC_ISYM_IRAND,
 407   GFC_ISYM_ISATTY,
 408   GFC_ISYM_IS_IOSTAT_END,
 409   GFC_ISYM_IS_IOSTAT_EOR,
 410   GFC_ISYM_ISNAN,
 411   GFC_ISYM_ISHFT,
 412   GFC_ISYM_ISHFTC,
 413   GFC_ISYM_ITIME,
 414   GFC_ISYM_J0,
 415   GFC_ISYM_J1,
 416   GFC_ISYM_JN,
 417   GFC_ISYM_KILL,
 418   GFC_ISYM_KIND,
 419   GFC_ISYM_LBOUND,
 420   GFC_ISYM_LEADZ,
 421   GFC_ISYM_LEN,
 422   GFC_ISYM_LEN_TRIM,
 423   GFC_ISYM_LGAMMA,
 424   GFC_ISYM_LGE,
 425   GFC_ISYM_LGT,
 426   GFC_ISYM_LINK,
 427   GFC_ISYM_LLE,
 428   GFC_ISYM_LLT,
 429   GFC_ISYM_LOC,
 430   GFC_ISYM_LOG,
 431   GFC_ISYM_LOG10,
 432   GFC_ISYM_LOGICAL,
 433   GFC_ISYM_LONG,
 434   GFC_ISYM_LSHIFT,
 435   GFC_ISYM_LSTAT,
 436   GFC_ISYM_LTIME,
 437   GFC_ISYM_MALLOC,
 438   GFC_ISYM_MATMUL,
 439   GFC_ISYM_MAX,
 440   GFC_ISYM_MAXEXPONENT,
 441   GFC_ISYM_MAXLOC,
 442   GFC_ISYM_MAXVAL,
 443   GFC_ISYM_MCLOCK,
 444   GFC_ISYM_MCLOCK8,
 445   GFC_ISYM_MERGE,
 446   GFC_ISYM_MIN,
 447   GFC_ISYM_MINEXPONENT,
 448   GFC_ISYM_MINLOC,
 449   GFC_ISYM_MINVAL,
 450   GFC_ISYM_MOD,
 451   GFC_ISYM_MODULO,
 452   GFC_ISYM_MOVE_ALLOC,
 453   GFC_ISYM_MVBITS,
 454   GFC_ISYM_NEAREST,
 455   GFC_ISYM_NEW_LINE,
 456   GFC_ISYM_NINT,
 457   GFC_ISYM_NOT,
 458   GFC_ISYM_NULL,
 459   GFC_ISYM_OR,
 460   GFC_ISYM_PACK,
 461   GFC_ISYM_PERROR,
 462   GFC_ISYM_PRECISION,
 463   GFC_ISYM_PRESENT,
 464   GFC_ISYM_PRODUCT,
 465   GFC_ISYM_RADIX,
 466   GFC_ISYM_RAND,
 467   GFC_ISYM_RANDOM_NUMBER,
 468   GFC_ISYM_RANDOM_SEED,
 469   GFC_ISYM_RANGE,
 470   GFC_ISYM_REAL,
 471   GFC_ISYM_RENAME,
 472   GFC_ISYM_REPEAT,
 473   GFC_ISYM_RESHAPE,
 474   GFC_ISYM_RRSPACING,
 475   GFC_ISYM_RSHIFT,
 476   GFC_ISYM_SC_KIND,
 477   GFC_ISYM_SCALE,
 478   GFC_ISYM_SCAN,
 479   GFC_ISYM_SECNDS,
 480   GFC_ISYM_SECOND,
 481   GFC_ISYM_SET_EXPONENT,
 482   GFC_ISYM_SHAPE,
 483   GFC_ISYM_SIGN,
 484   GFC_ISYM_SIGNAL,
 485   GFC_ISYM_SI_KIND,
 486   GFC_ISYM_SIN,
 487   GFC_ISYM_SINH,
 488   GFC_ISYM_SIZE,
 489   GFC_ISYM_SLEEP,
 490   GFC_ISYM_SIZEOF,
 491   GFC_ISYM_SPACING,
 492   GFC_ISYM_SPREAD,
 493   GFC_ISYM_SQRT,
 494   GFC_ISYM_SRAND,
 495   GFC_ISYM_SR_KIND,
 496   GFC_ISYM_STAT,
 497   GFC_ISYM_SUM,
 498   GFC_ISYM_SYMLINK,
 499   GFC_ISYM_SYMLNK,
 500   GFC_ISYM_SYSTEM,
 501   GFC_ISYM_SYSTEM_CLOCK,
 502   GFC_ISYM_TAN,
 503   GFC_ISYM_TANH,
 504   GFC_ISYM_TIME,
 505   GFC_ISYM_TIME8,
 506   GFC_ISYM_TINY,
 507   GFC_ISYM_TRAILZ,
 508   GFC_ISYM_TRANSFER,
 509   GFC_ISYM_TRANSPOSE,
 510   GFC_ISYM_TRIM,
 511   GFC_ISYM_TTYNAM,
 512   GFC_ISYM_UBOUND,
 513   GFC_ISYM_UMASK,
 514   GFC_ISYM_UNLINK,
 515   GFC_ISYM_UNPACK,
 516   GFC_ISYM_VERIFY,
 517   GFC_ISYM_XOR,
 518   GFC_ISYM_Y0,
 519   GFC_ISYM_Y1,
 520   GFC_ISYM_YN
 521 };
 522 typedef enum gfc_isym_id gfc_isym_id;
 523
 524
 525 typedef enum
 526 {
 527   GFC_INIT_REAL_OFF = 0,
 528   GFC_INIT_REAL_ZERO,
 529   GFC_INIT_REAL_NAN,
 530   GFC_INIT_REAL_SNAN,
 531   GFC_INIT_REAL_INF,
 532   GFC_INIT_REAL_NEG_INF
 533 }
 534 init_local_real;
 535
 536 typedef enum
 537 {
 538   GFC_INIT_LOGICAL_OFF = 0,
 539   GFC_INIT_LOGICAL_FALSE,
 540   GFC_INIT_LOGICAL_TRUE
 541 }
 542 init_local_logical;
 543
 544 typedef enum
 545 {
 546   GFC_INIT_CHARACTER_OFF = 0,
 547   GFC_INIT_CHARACTER_ON
 548 }
 549 init_local_character;
 550
 551 typedef enum
 552 {
 553   GFC_INIT_INTEGER_OFF = 0,
 554   GFC_INIT_INTEGER_ON
 555 }
 556 init_local_integer;
 557
 558 /************************* Structures *****************************/
 559
 560 /* Used for keeping things in balanced binary trees.  */
 561 #define BBT_HEADER(self) int priority; struct self *left, *right
 562
 563 #define NAMED_INTCST(a,b,c,d) a,
 564 typedef enum
 565 {
 566   ISOFORTRANENV_INVALID = -1,
 567 #include "iso-fortran-env.def"
 568   ISOFORTRANENV_LAST, ISOFORTRANENV_NUMBER = ISOFORTRANENV_LAST
 569 }
 570 iso_fortran_env_symbol;
 571 #undef NAMED_INTCST
 572
 573 #define NAMED_INTCST(a,b,c,d) a,
 574 #define NAMED_REALCST(a,b,c) a,
 575 #define NAMED_CMPXCST(a,b,c) a,
 576 #define NAMED_LOGCST(a,b,c) a,
 577 #define NAMED_CHARKNDCST(a,b,c) a,
 578 #define NAMED_CHARCST(a,b,c) a,
 579 #define DERIVED_TYPE(a,b,c) a,
 580 #define PROCEDURE(a,b) a,
 581 typedef enum
 582 {
 583   ISOCBINDING_INVALID = -1,
 584 #include "iso-c-binding.def"
 585   ISOCBINDING_LAST,
 586   ISOCBINDING_NUMBER = ISOCBINDING_LAST
 587 }
 588 iso_c_binding_symbol;
 589 #undef NAMED_INTCST
 590 #undef NAMED_REALCST
 591 #undef NAMED_CMPXCST
 592 #undef NAMED_LOGCST
 593 #undef NAMED_CHARKNDCST
 594 #undef NAMED_CHARCST
 595 #undef DERIVED_TYPE
 596 #undef PROCEDURE
 597
 598 typedef enum
 599 {
 600   INTMOD_NONE = 0, INTMOD_ISO_FORTRAN_ENV, INTMOD_ISO_C_BINDING
 601 }
 602 intmod_id;
 603
 604 typedef struct
 605 {
 606   char name[GFC_MAX_SYMBOL_LEN + 1];
 607   int value;  /* Used for both integer and character values.  */
 608   bt f90_type;
 609 }
 610 CInteropKind_t;
 611
 612 /* Array of structs, where the structs represent the C interop kinds.
 613    The list will be implemented based on a hash of the kind name since
 614    these could be accessed multiple times.
 615    Declared in trans-types.c as a global, since it's in that file
 616    that the list is initialized.  */
 617 extern CInteropKind_t c_interop_kinds_table[];
 618
 619 /* Symbol attribute structure.  */
 620 typedef struct
 621 {
 622   /* Variable attributes.  */
 623   unsigned allocatable:1, dimension:1, external:1, intrinsic:1,
 624     optional:1, pointer:1, target:1, value:1, volatile_:1,
 625     dummy:1, result:1, assign:1, threadprivate:1, not_always_present:1,
 626     implied_index:1, subref_array_pointer:1, proc_pointer:1;
 627
 628   ENUM_BITFIELD (save_state) save:2;
 629
 630   unsigned data:1,              /* Symbol is named in a DATA statement.  */
 631     is_protected:1,             /* Symbol has been marked as protected.  */
 632     use_assoc:1,                /* Symbol has been use-associated.  */
 633     use_only:1,                 /* Symbol has been use-associated, with ONLY.  */
 634     use_rename:1,               /* Symbol has been use-associated and renamed.  */
 635     imported:1;                 /* Symbol has been associated by IMPORT.  */
 636
 637   unsigned in_namelist:1, in_common:1, in_equivalence:1;
 638   unsigned function:1, subroutine:1, procedure:1;
 639   unsigned generic:1, generic_copy:1;
 640   unsigned implicit_type:1;     /* Type defined via implicit rules.  */
 641   unsigned untyped:1;           /* No implicit type could be found.  */
 642
 643   unsigned is_bind_c:1;         /* say if is bound to C.  */
 644   unsigned extension:1;         /* extends a derived type.  */
 645
 646   /* These flags are both in the typespec and attribute.  The attribute
 647      list is what gets read from/written to a module file.  The typespec
 648      is created from a decl being processed.  */
 649   unsigned is_c_interop:1;      /* It's c interoperable.  */
 650   unsigned is_iso_c:1;          /* Symbol is from iso_c_binding.  */
 651
 652   /* Function/subroutine attributes */
 653   unsigned sequence:1, elemental:1, pure:1, recursive:1;
 654   unsigned unmaskable:1, masked:1, contained:1, mod_proc:1, abstract:1;
 655
 656   /* This is set if the subroutine doesn't return.  Currently, this
 657      is only possible for intrinsic subroutines.  */
 658   unsigned noreturn:1;
 659
 660   /* Set if this procedure is an alternate entry point.  These procedures
 661      don't have any code associated, and the backend will turn them into
 662      thunks to the master function.  */
 663   unsigned entry:1;
 664
 665   /* Set if this is the master function for a procedure with multiple
 666      entry points.  */
 667   unsigned entry_master:1;
 668
 669   /* Set if this is the master function for a function with multiple
 670      entry points where characteristics of the entry points differ.  */
 671   unsigned mixed_entry_master:1;
 672
 673   /* Set if a function must always be referenced by an explicit interface.  */
 674   unsigned always_explicit:1;
 675
 676   /* Set if the symbol has been referenced in an expression.  No further
 677      modification of type or type parameters is permitted.  */
 678   unsigned referenced:1;
 679
 680   /* Set if the symbol has ambiguous interfaces.  */
 681   unsigned ambiguous_interfaces:1;
 682
 683   /* Set if this is the symbol for the main program.  */
 684   unsigned is_main_program:1;
 685
 686   /* Mutually exclusive multibit attributes.  */
 687   ENUM_BITFIELD (gfc_access) access:2;
 688   ENUM_BITFIELD (sym_intent) intent:2;
 689   ENUM_BITFIELD (sym_flavor) flavor:4;
 690   ENUM_BITFIELD (ifsrc) if_source:2;
 691
 692   ENUM_BITFIELD (procedure_type) proc:3;
 693
 694   /* Special attributes for Cray pointers, pointees.  */
 695   unsigned cray_pointer:1, cray_pointee:1;
 696
 697   /* The symbol is a derived type with allocatable components, pointer
 698      components or private components, possibly nested.  zero_comp
 699      is true if the derived type has no component at all.  */
 700   unsigned alloc_comp:1, pointer_comp:1, private_comp:1, zero_comp:1;
 701
 702   /* The namespace where the VOLATILE attribute has been set.  */
 703   struct gfc_namespace *volatile_ns;
 704 }
 705 symbol_attribute;
 706
 707
 708 /* We need to store source lines as sequences of multibyte source
 709    characters. We define here a type wide enough to hold any multibyte
 710    source character, just like libcpp does.  A 32-bit type is enough.  */
 711
 712 #if HOST_BITS_PER_INT >= 32
 713 typedef unsigned int gfc_char_t;
 714 #elif HOST_BITS_PER_LONG >= 32
 715 typedef unsigned long gfc_char_t;
 716 #elif defined(HAVE_LONG_LONG) && (HOST_BITS_PER_LONGLONG >= 32)
 717 typedef unsigned long long gfc_char_t;
 718 #else
 719 # error "Cannot find an integer type with at least 32 bits"
 720 #endif
 721
 722
 723 /* The following three structures are used to identify a location in
 724    the sources.
 725
 726    gfc_file is used to maintain a tree of the source files and how
 727    they include each other
 728
 729    gfc_linebuf holds a single line of source code and information
 730    which file it resides in
 731
 732    locus point to the sourceline and the character in the source
 733    line.
 734 */
 735
 736 typedef struct gfc_file
 737 {
 738   struct gfc_file *next, *up;
 739   int inclusion_line, line;
 740   char *filename;
 741 } gfc_file;
 742
 743 typedef struct gfc_linebuf
 744 {
 745   source_location location;
 746   struct gfc_file *file;
 747   struct gfc_linebuf *next;
 748
 749   int truncated;
 750   bool dbg_emitted;
 751
 752   gfc_char_t line[1];
 753 } gfc_linebuf;
 754
 755 #define gfc_linebuf_header_size (offsetof (gfc_linebuf, line))
 756
 757 #define gfc_linebuf_linenum(LBUF) (LOCATION_LINE ((LBUF)->location))
 758
 759 typedef struct
 760 {
 761   gfc_char_t *nextc;
 762   gfc_linebuf *lb;
 763 } locus;
 764
 765 /* In order for the "gfc" format checking to work correctly, you must
 766    have declared a typedef locus first.  */
 767 #if GCC_VERSION >= 4001
 768 #define ATTRIBUTE_GCC_GFC(m, n) __attribute__ ((__format__ (__gcc_gfc__, m, n))) ATTRIBUTE_NONNULL(m)
 769 #else
 770 #define ATTRIBUTE_GCC_GFC(m, n) ATTRIBUTE_NONNULL(m)
 771 #endif
 772
 773
 774 /* Suppress error messages or re-enable them.  */
 775
 776 void gfc_push_suppress_errors (void);
 777 void gfc_pop_suppress_errors (void);
 778
 779
 780 /* Character length structures hold the expression that gives the
 781    length of a character variable.  We avoid putting these into
 782    gfc_typespec because doing so prevents us from doing structure
 783    copies and forces us to deallocate any typespecs we create, as well
 784    as structures that contain typespecs.  They also can have multiple
 785    character typespecs pointing to them.
 786
 787    These structures form a singly linked list within the current
 788    namespace and are deallocated with the namespace.  It is possible to
 789    end up with gfc_charlen structures that have nothing pointing to them.  */
 790
 791 typedef struct gfc_charlen
 792 {
 793   struct gfc_expr *length;
 794   struct gfc_charlen *next;
 795   bool length_from_typespec; /* Length from explicit array ctor typespec?  */
 796   tree backend_decl;
 797
 798   int resolved;
 799 }
 800 gfc_charlen;
 801
 802 #define gfc_get_charlen() XCNEW (gfc_charlen)
 803
 804 /* Type specification structure.  FIXME: derived and cl could be union???  */
 805 typedef struct
 806 {
 807   bt type;
 808   int kind;
 809   struct gfc_symbol *derived;
 810   gfc_charlen *cl;      /* For character types only.  */
 811   struct gfc_symbol *interface; /* For PROCEDURE declarations.  */
 812   int is_c_interop;
 813   int is_iso_c;
 814   bt f90_type;
 815 }
 816 gfc_typespec;
 817
 818 /* Array specification.  */
 819 typedef struct
 820 {
 821   int rank;     /* A rank of zero means that a variable is a scalar.  */
 822   array_type type;
 823   struct gfc_expr *lower[GFC_MAX_DIMENSIONS], *upper[GFC_MAX_DIMENSIONS];
 824
 825   /* These two fields are used with the Cray Pointer extension.  */
 826   bool cray_pointee; /* True iff this spec belongs to a cray pointee.  */
 827   bool cp_was_assumed; /* AS_ASSUMED_SIZE cp arrays are converted to
 828                         AS_EXPLICIT, but we want to remember that we
 829                         did this.  */
 830
 831 }
 832 gfc_array_spec;
 833
 834 #define gfc_get_array_spec() XCNEW (gfc_array_spec)
 835
 836
 837 /* Components of derived types.  */
 838 typedef struct gfc_component
 839 {
 840   const char *name;
 841   gfc_typespec ts;
 842
 843   symbol_attribute attr;
 844   gfc_array_spec *as;
 845
 846   tree backend_decl;
 847   locus loc;
 848   struct gfc_expr *initializer;
 849   struct gfc_component *next;
 850 }
 851 gfc_component;
 852
 853 #define gfc_get_component() XCNEW (gfc_component)
 854
 855 /* Formal argument lists are lists of symbols.  */
 856 typedef struct gfc_formal_arglist
 857 {
 858   /* Symbol representing the argument at this position in the arglist.  */
 859   struct gfc_symbol *sym;
 860   /* Points to the next formal argument.  */
 861   struct gfc_formal_arglist *next;
 862 }
 863 gfc_formal_arglist;
 864
 865 #define gfc_get_formal_arglist() XCNEW (gfc_formal_arglist)
 866
 867
 868 /* The gfc_actual_arglist structure is for actual arguments.  */
 869 typedef struct gfc_actual_arglist
 870 {
 871   const char *name;
 872   /* Alternate return label when the expr member is null.  */
 873   struct gfc_st_label *label;
 874
 875   /* This is set to the type of an eventual omitted optional
 876      argument. This is used to determine if a hidden string length
 877      argument has to be added to a function call.  */
 878   bt missing_arg_type;
 879
 880   struct gfc_expr *expr;
 881   struct gfc_actual_arglist *next;
 882 }
 883 gfc_actual_arglist;
 884
 885 #define gfc_get_actual_arglist() XCNEW (gfc_actual_arglist)
 886
 887
 888 /* Because a symbol can belong to multiple namelists, they must be
 889    linked externally to the symbol itself.  */
 890 typedef struct gfc_namelist
 891 {
 892   struct gfc_symbol *sym;
 893   struct gfc_namelist *next;
 894 }
 895 gfc_namelist;
 896
 897 #define gfc_get_namelist() XCNEW (gfc_namelist)
 898
 899 enum
 900 {
 901   OMP_LIST_PRIVATE,
 902   OMP_LIST_FIRSTPRIVATE,
 903   OMP_LIST_LASTPRIVATE,
 904   OMP_LIST_COPYPRIVATE,
 905   OMP_LIST_SHARED,
 906   OMP_LIST_COPYIN,
 907   OMP_LIST_PLUS,
 908   OMP_LIST_REDUCTION_FIRST = OMP_LIST_PLUS,
 909   OMP_LIST_MULT,
 910   OMP_LIST_SUB,
 911   OMP_LIST_AND,
 912   OMP_LIST_OR,
 913   OMP_LIST_EQV,
 914   OMP_LIST_NEQV,
 915   OMP_LIST_MAX,
 916   OMP_LIST_MIN,
 917   OMP_LIST_IAND,
 918   OMP_LIST_IOR,
 919   OMP_LIST_IEOR,
 920   OMP_LIST_REDUCTION_LAST = OMP_LIST_IEOR,
 921   OMP_LIST_NUM
 922 };
 923
 924 /* Because a symbol can belong to multiple namelists, they must be
 925    linked externally to the symbol itself.  */
 926 typedef struct gfc_omp_clauses
 927 {
 928   struct gfc_expr *if_expr;
 929   struct gfc_expr *num_threads;
 930   gfc_namelist *lists[OMP_LIST_NUM];
 931   enum
 932     {
 933       OMP_SCHED_NONE,
 934       OMP_SCHED_STATIC,
 935       OMP_SCHED_DYNAMIC,
 936       OMP_SCHED_GUIDED,
 937       OMP_SCHED_RUNTIME,
 938       OMP_SCHED_AUTO
 939     } sched_kind;
 940   struct gfc_expr *chunk_size;
 941   enum
 942     {
 943       OMP_DEFAULT_UNKNOWN,
 944       OMP_DEFAULT_NONE,
 945       OMP_DEFAULT_PRIVATE,
 946       OMP_DEFAULT_SHARED,
 947       OMP_DEFAULT_FIRSTPRIVATE
 948     } default_sharing;
 949   int collapse;
 950   bool nowait, ordered, untied;
 951 }
 952 gfc_omp_clauses;
 953
 954 #define gfc_get_omp_clauses() XCNEW (gfc_omp_clauses)
 955
 956
 957 /* The gfc_st_label structure is a BBT attached to a namespace that
 958    records the usage of statement labels within that space.  */
 959
 960 typedef struct gfc_st_label
 961 {
 962   BBT_HEADER(gfc_st_label);
 963
 964   int value;
 965
 966   gfc_sl_type defined, referenced;
 967
 968   struct gfc_expr *format;
 969
 970   tree backend_decl;
 971
 972   locus where;
 973 }
 974 gfc_st_label;
 975
 976
 977 /* gfc_interface()-- Interfaces are lists of symbols strung together.  */
 978 typedef struct gfc_interface
 979 {
 980   struct gfc_symbol *sym;
 981   locus where;
 982   struct gfc_interface *next;
 983 }
 984 gfc_interface;
 985
 986 #define gfc_get_interface() XCNEW (gfc_interface)
 987
 988 /* User operator nodes.  These are like stripped down symbols.  */
 989 typedef struct
 990 {
 991   const char *name;
 992
 993   gfc_interface *op;
 994   struct gfc_namespace *ns;
 995   gfc_access access;
 996 }
 997 gfc_user_op;
 998
 999
1000 /* A list of specific bindings that are associated with a generic spec.  */
1001 typedef struct gfc_tbp_generic
1002 {
1003   /* The parser sets specific_st, upon resolution we look for the corresponding
1004      gfc_typebound_proc and set specific for further use.  */
1005   struct gfc_symtree* specific_st;
1006   struct gfc_typebound_proc* specific;
1007
1008   struct gfc_tbp_generic* next;
1009 }
1010 gfc_tbp_generic;
1011
1012 #define gfc_get_tbp_generic() XCNEW (gfc_tbp_generic)
1013
1014
1015 /* Data needed for type-bound procedures.  */
1016 typedef struct gfc_typebound_proc
1017 {
1018   locus where; /* Where the PROCEDURE/GENERIC definition was.  */
1019
1020   union
1021   {
1022     struct gfc_symtree* specific; /* The interface if DEFERRED.  */
1023     gfc_tbp_generic* generic;
1024   }
1025   u;
1026
1027   gfc_access access;
1028   char* pass_arg; /* Argument-name for PASS.  NULL if not specified.  */
1029
1030   /* The overridden type-bound proc (or GENERIC with this name in the
1031      parent-type) or NULL if non.  */
1032   struct gfc_typebound_proc* overridden;
1033
1034   /* Once resolved, we use the position of pass_arg in the formal arglist of
1035      the binding-target procedure to identify it.  The first argument has
1036      number 1 here, the second 2, and so on.  */
1037   unsigned pass_arg_num;
1038
1039   unsigned nopass:1; /* Whether we have NOPASS (PASS otherwise).  */
1040   unsigned non_overridable:1;
1041   unsigned deferred:1;
1042   unsigned is_generic:1;
1043   unsigned function:1, subroutine:1;
1044   unsigned error:1; /* Ignore it, when an error occurred during resolution.  */
1045 }
1046 gfc_typebound_proc;
1047
1048 #define gfc_get_typebound_proc() XCNEW (gfc_typebound_proc)
1049
1050
1051 /* Symbol nodes.  These are important things.  They are what the
1052    standard refers to as "entities".  The possibly multiple names that
1053    refer to the same entity are accomplished by a binary tree of
1054    symtree structures that is balanced by the red-black method-- more
1055    than one symtree node can point to any given symbol.  */
1056
1057 typedef struct gfc_symbol
1058 {
1059   const char *name;     /* Primary name, before renaming */
1060   const char *module;   /* Module this symbol came from */
1061   locus declared_at;
1062
1063   gfc_typespec ts;
1064   symbol_attribute attr;
1065
1066   /* The formal member points to the formal argument list if the
1067      symbol is a function or subroutine name.  If the symbol is a
1068      generic name, the generic member points to the list of
1069      interfaces.  */
1070
1071   gfc_interface *generic;
1072   gfc_access component_access;
1073
1074   gfc_formal_arglist *formal;
1075   struct gfc_namespace *formal_ns;
1076   struct gfc_namespace *f2k_derived;
1077
1078   struct gfc_expr *value;       /* Parameter/Initializer value */
1079   gfc_array_spec *as;
1080   struct gfc_symbol *result;    /* function result symbol */
1081   gfc_component *components;    /* Derived type components */
1082
1083   /* Defined only for Cray pointees; points to their pointer.  */
1084   struct gfc_symbol *cp_pointer;
1085
1086   struct gfc_symbol *common_next;       /* Links for COMMON syms */
1087
1088   /* This is in fact a gfc_common_head but it is only used for pointer
1089      comparisons to check if symbols are in the same common block.  */
1090   struct gfc_common_head* common_head;
1091
1092   /* Make sure setup code for dummy arguments is generated in the correct
1093      order.  */
1094   int dummy_order;
1095
1096   int entry_id;
1097
1098   gfc_namelist *namelist, *namelist_tail;
1099
1100   /* Change management fields.  Symbols that might be modified by the
1101      current statement have the mark member nonzero and are kept in a
1102      singly linked list through the tlink field.  Of these symbols,
1103      symbols with old_symbol equal to NULL are symbols created within
1104      the current statement.  Otherwise, old_symbol points to a copy of
1105      the old symbol.  */
1106
1107   struct gfc_symbol *old_symbol, *tlink;
1108   unsigned mark:1, gfc_new:1;
1109   /* Nonzero if all equivalences associated with this symbol have been
1110      processed.  */
1111   unsigned equiv_built:1;
1112   /* Set if this variable is used as an index name in a FORALL.  */
1113   unsigned forall_index:1;
1114   int refs;
1115   struct gfc_namespace *ns;     /* namespace containing this symbol */
1116
1117   tree backend_decl;
1118
1119   /* Identity of the intrinsic module the symbol comes from, or
1120      INTMOD_NONE if it's not imported from a intrinsic module.  */
1121   intmod_id from_intmod;
1122   /* Identity of the symbol from intrinsic modules, from enums maintained
1123      separately by each intrinsic module.  Used together with from_intmod,
1124      it uniquely identifies a symbol from an intrinsic module.  */
1125   int intmod_sym_id;
1126
1127   /* This may be repetitive, since the typespec now has a binding
1128      label field.  */
1129   char binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
1130   /* Store a reference to the common_block, if this symbol is in one.  */
1131   struct gfc_common_head *common_block;
1132 }
1133 gfc_symbol;
1134
1135
1136 /* This structure is used to keep track of symbols in common blocks.  */
1137 typedef struct gfc_common_head
1138 {
1139   locus where;
1140   char use_assoc, saved, threadprivate;
1141   char name[GFC_MAX_SYMBOL_LEN + 1];
1142   struct gfc_symbol *head;
1143   char binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
1144   int is_bind_c;
1145 }
1146 gfc_common_head;
1147
1148 #define gfc_get_common_head() XCNEW (gfc_common_head)
1149
1150
1151 /* A list of all the alternate entry points for a procedure.  */
1152
1153 typedef struct gfc_entry_list
1154 {
1155   /* The symbol for this entry point.  */
1156   gfc_symbol *sym;
1157   /* The zero-based id of this entry point.  */
1158   int id;
1159   /* The LABEL_EXPR marking this entry point.  */
1160   tree label;
1161   /* The next item in the list.  */
1162   struct gfc_entry_list *next;
1163 }
1164 gfc_entry_list;
1165
1166 #define gfc_get_entry_list() \
1167   (gfc_entry_list *) gfc_getmem(sizeof(gfc_entry_list))
1168
1169 /* Lists of rename info for the USE statement.  */
1170
1171 typedef struct gfc_use_rename
1172 {
1173   char local_name[GFC_MAX_SYMBOL_LEN + 1], use_name[GFC_MAX_SYMBOL_LEN + 1];
1174   struct gfc_use_rename *next;
1175   int found;
1176   gfc_intrinsic_op op;
1177   locus where;
1178 }
1179 gfc_use_rename;
1180
1181 #define gfc_get_use_rename() XCNEW (gfc_use_rename);
1182
1183 /* A list of all USE statements in a namespace.  */
1184
1185 typedef struct gfc_use_list
1186 {
1187   const char *module_name;
1188   int only_flag;
1189   struct gfc_use_rename *rename;
1190   locus where;
1191   /* Next USE statement.  */
1192   struct gfc_use_list *next;
1193 }
1194 gfc_use_list;
1195
1196 #define gfc_get_use_list() \
1197   (gfc_use_list *) gfc_getmem(sizeof(gfc_use_list))
1198
1199 /* Within a namespace, symbols are pointed to by symtree nodes that
1200    are linked together in a balanced binary tree.  There can be
1201    several symtrees pointing to the same symbol node via USE
1202    statements.  */
1203
1204 typedef struct gfc_symtree
1205 {
1206   BBT_HEADER (gfc_symtree);
1207   const char *name;
1208   int ambiguous;
1209   union
1210   {
1211     gfc_symbol *sym;            /* Symbol associated with this node */
1212     gfc_user_op *uop;
1213     gfc_common_head *common;
1214   }
1215   n;
1216
1217   /* Data for type-bound procedures; NULL if no type-bound procedure.  */
1218   gfc_typebound_proc* typebound;
1219 }
1220 gfc_symtree;
1221
1222 /* A linked list of derived types in the namespace.  */
1223 typedef struct gfc_dt_list
1224 {
1225   struct gfc_symbol *derived;
1226   struct gfc_dt_list *next;
1227 }
1228 gfc_dt_list;
1229
1230 #define gfc_get_dt_list() XCNEW (gfc_dt_list)
1231
1232   /* A list of all derived types.  */
1233   extern gfc_dt_list *gfc_derived_types;
1234
1235 /* A namespace describes the contents of procedure, module or
1236    interface block.  */
1237 /* ??? Anything else use these?  */
1238
1239 typedef struct gfc_namespace
1240 {
1241   /* Tree containing all the symbols in this namespace.  */
1242   gfc_symtree *sym_root;
1243   /* Tree containing all the user-defined operators in the namespace.  */
1244   gfc_symtree *uop_root;
1245   /* Tree containing all the common blocks.  */
1246   gfc_symtree *common_root;
1247   /* Linked list of finalizer procedures.  */
1248   struct gfc_finalizer *finalizers;
1249
1250   /* If set_flag[letter] is set, an implicit type has been set for letter.  */
1251   int set_flag[GFC_LETTERS];
1252   /* Keeps track of the implicit types associated with the letters.  */
1253   gfc_typespec default_type[GFC_LETTERS];
1254   /* Store the positions of IMPLICIT statements.  */
1255   locus implicit_loc[GFC_LETTERS];
1256
1257   /* If this is a namespace of a procedure, this points to the procedure.  */
1258   struct gfc_symbol *proc_name;
1259   /* If this is the namespace of a unit which contains executable
1260      code, this points to it.  */
1261   struct gfc_code *code;
1262
1263   /* Points to the equivalences set up in this namespace.  */
1264   struct gfc_equiv *equiv;
1265
1266   /* Points to the equivalence groups produced by trans_common.  */
1267   struct gfc_equiv_list *equiv_lists;
1268
1269   gfc_interface *op[GFC_INTRINSIC_OPS];
1270
1271   /* Points to the parent namespace, i.e. the namespace of a module or
1272      procedure in which the procedure belonging to this namespace is
1273      contained. The parent namespace points to this namespace either
1274      directly via CONTAINED, or indirectly via the chain built by
1275      SIBLING.  */
1276   struct gfc_namespace *parent;
1277   /* CONTAINED points to the first contained namespace. Sibling
1278      namespaces are chained via SIBLING.  */
1279   struct gfc_namespace  *contained, *sibling;
1280
1281   gfc_common_head blank_common;
1282   gfc_access default_access, operator_access[GFC_INTRINSIC_OPS];
1283
1284   gfc_st_label *st_labels;
1285   /* This list holds information about all the data initializers in
1286      this namespace.  */
1287   struct gfc_data *data;
1288
1289   gfc_charlen *cl_list, *old_cl_list;
1290
1291   int save_all, seen_save, seen_implicit_none;
1292
1293   /* Normally we don't need to refcount namespaces.  However when we read
1294      a module containing a function with multiple entry points, this
1295      will appear as several functions with the same formal namespace.  */
1296   int refs;
1297
1298   /* A list of all alternate entry points to this procedure (or NULL).  */
1299   gfc_entry_list *entries;
1300
1301   /* A list of USE statements in this namespace.  */
1302   gfc_use_list *use_stmts;
1303
1304   /* Set to 1 if namespace is a BLOCK DATA program unit.  */
1305   int is_block_data;
1306
1307   /* Set to 1 if namespace is an interface body with "IMPORT" used.  */
1308   int has_import_set;
1309
1310   /* Set to 1 if resolved has been called for this namespace.  */
1311   int resolved;
1312 }
1313 gfc_namespace;
1314
1315 extern gfc_namespace *gfc_current_ns;
1316 extern gfc_namespace *gfc_global_ns_list;
1317
1318 /* Global symbols are symbols of global scope. Currently we only use
1319    this to detect collisions already when parsing.
1320    TODO: Extend to verify procedure calls.  */
1321
1322 typedef struct gfc_gsymbol
1323 {
1324   BBT_HEADER(gfc_gsymbol);
1325
1326   const char *name;
1327   const char *sym_name;
1328   const char *mod_name;
1329   const char *binding_label;
1330   enum { GSYM_UNKNOWN=1, GSYM_PROGRAM, GSYM_FUNCTION, GSYM_SUBROUTINE,
1331         GSYM_MODULE, GSYM_COMMON, GSYM_BLOCK_DATA } type;
1332
1333   int defined, used;
1334   locus where;
1335   gfc_namespace *ns;
1336 }
1337 gfc_gsymbol;
1338
1339 extern gfc_gsymbol *gfc_gsym_root;
1340
1341 /* Information on interfaces being built.  */
1342 typedef struct
1343 {
1344   interface_type type;
1345   gfc_symbol *sym;
1346   gfc_namespace *ns;
1347   gfc_user_op *uop;
1348   gfc_intrinsic_op op;
1349 }
1350 gfc_interface_info;
1351
1352 extern gfc_interface_info current_interface;
1353
1354
1355 /* Array reference.  */
1356 typedef struct gfc_array_ref
1357 {
1358   ar_type type;
1359   int dimen;                    /* # of components in the reference */
1360   locus where;
1361   gfc_array_spec *as;
1362
1363   locus c_where[GFC_MAX_DIMENSIONS];    /* All expressions can be NULL */
1364   struct gfc_expr *start[GFC_MAX_DIMENSIONS], *end[GFC_MAX_DIMENSIONS],
1365     *stride[GFC_MAX_DIMENSIONS];
1366
1367   enum
1368   { DIMEN_ELEMENT = 1, DIMEN_RANGE, DIMEN_VECTOR, DIMEN_UNKNOWN }
1369   dimen_type[GFC_MAX_DIMENSIONS];
1370
1371   struct gfc_expr *offset;
1372 }
1373 gfc_array_ref;
1374
1375 #define gfc_get_array_ref() XCNEW (gfc_array_ref)
1376
1377
1378 /* Component reference nodes.  A variable is stored as an expression
1379    node that points to the base symbol.  After that, a singly linked
1380    list of component reference nodes gives the variable's complete
1381    resolution.  The array_ref component may be present and comes
1382    before the component component.  */
1383
1384 typedef enum
1385   { REF_ARRAY, REF_COMPONENT, REF_SUBSTRING }
1386 ref_type;
1387
1388 typedef struct gfc_ref
1389 {
1390   ref_type type;
1391
1392   union
1393   {
1394     struct gfc_array_ref ar;
1395
1396     struct
1397     {
1398       gfc_component *component;
1399       gfc_symbol *sym;
1400     }
1401     c;
1402
1403     struct
1404     {
1405       struct gfc_expr *start, *end;     /* Substring */
1406       gfc_charlen *length;
1407     }
1408     ss;
1409
1410   }
1411   u;
1412
1413   struct gfc_ref *next;
1414 }
1415 gfc_ref;
1416
1417 #define gfc_get_ref() XCNEW (gfc_ref)
1418
1419
1420 /* Structures representing intrinsic symbols and their arguments lists.  */
1421 typedef struct gfc_intrinsic_arg
1422 {
1423   char name[GFC_MAX_SYMBOL_LEN + 1];
1424
1425   gfc_typespec ts;
1426   int optional;
1427   gfc_actual_arglist *actual;
1428
1429   struct gfc_intrinsic_arg *next;
1430
1431 }
1432 gfc_intrinsic_arg;
1433
1434
1435 /* Specifies the various kinds of check functions used to verify the
1436    argument lists of intrinsic functions. fX with X an integer refer
1437    to check functions of intrinsics with X arguments. f1m is used for
1438    the MAX and MIN intrinsics which can have an arbitrary number of
1439    arguments, f3ml is used for the MINLOC and MAXLOC intrinsics as
1440    these have special semantics.  */
1441
1442 typedef union
1443 {
1444   gfc_try (*f0)(void);
1445   gfc_try (*f1)(struct gfc_expr *);
1446   gfc_try (*f1m)(gfc_actual_arglist *);
1447   gfc_try (*f2)(struct gfc_expr *, struct gfc_expr *);
1448   gfc_try (*f3)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1449   gfc_try (*f3ml)(gfc_actual_arglist *);
1450   gfc_try (*f3red)(gfc_actual_arglist *);
1451   gfc_try (*f4)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1452             struct gfc_expr *);
1453   gfc_try (*f5)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1454             struct gfc_expr *, struct gfc_expr *);
1455 }
1456 gfc_check_f;
1457
1458 /* Like gfc_check_f, these specify the type of the simplification
1459    function associated with an intrinsic. The fX are just like in
1460    gfc_check_f. cc is used for type conversion functions.  */
1461
1462 typedef union
1463 {
1464   struct gfc_expr *(*f0)(void);
1465   struct gfc_expr *(*f1)(struct gfc_expr *);
1466   struct gfc_expr *(*f2)(struct gfc_expr *, struct gfc_expr *);
1467   struct gfc_expr *(*f3)(struct gfc_expr *, struct gfc_expr *,
1468                          struct gfc_expr *);
1469   struct gfc_expr *(*f4)(struct gfc_expr *, struct gfc_expr *,
1470                          struct gfc_expr *, struct gfc_expr *);
1471   struct gfc_expr *(*f5)(struct gfc_expr *, struct gfc_expr *,
1472                          struct gfc_expr *, struct gfc_expr *,
1473                          struct gfc_expr *);
1474   struct gfc_expr *(*cc)(struct gfc_expr *, bt, int);
1475 }
1476 gfc_simplify_f;
1477
1478 /* Again like gfc_check_f, these specify the type of the resolution
1479    function associated with an intrinsic. The fX are just like in
1480    gfc_check_f. f1m is used for MIN and MAX, s1 is used for abort().  */
1481
1482 typedef union
1483 {
1484   void (*f0)(struct gfc_expr *);
1485   void (*f1)(struct gfc_expr *, struct gfc_expr *);
1486   void (*f1m)(struct gfc_expr *, struct gfc_actual_arglist *);
1487   void (*f2)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1488   void (*f3)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1489              struct gfc_expr *);
1490   void (*f4)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1491              struct gfc_expr *, struct gfc_expr *);
1492   void (*f5)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1493              struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1494   void (*s1)(struct gfc_code *);
1495 }
1496 gfc_resolve_f;
1497
1498
1499 typedef struct gfc_intrinsic_sym
1500 {
1501   const char *name, *lib_name;
1502   gfc_intrinsic_arg *formal;
1503   gfc_typespec ts;
1504   unsigned elemental:1, inquiry:1, transformational:1, pure:1,
1505     generic:1, specific:1, actual_ok:1, noreturn:1, conversion:1;
1506
1507   int standard;
1508
1509   gfc_simplify_f simplify;
1510   gfc_check_f check;
1511   gfc_resolve_f resolve;
1512   struct gfc_intrinsic_sym *specific_head, *next;
1513   gfc_isym_id id;
1514
1515 }
1516 gfc_intrinsic_sym;
1517
1518
1519 /* Expression nodes.  The expression node types deserve explanations,
1520    since the last couple can be easily misconstrued:
1521
1522    EXPR_OP         Operator node pointing to one or two other nodes
1523    EXPR_FUNCTION   Function call, symbol points to function's name
1524    EXPR_CONSTANT   A scalar constant: Logical, String, Real, Int or Complex
1525    EXPR_VARIABLE   An Lvalue with a root symbol and possible reference list
1526                    which expresses structure, array and substring refs.
1527    EXPR_NULL       The NULL pointer value (which also has a basic type).
1528    EXPR_SUBSTRING  A substring of a constant string
1529    EXPR_STRUCTURE  A structure constructor
1530    EXPR_ARRAY      An array constructor.
1531    EXPR_COMPCALL   Function (or subroutine) call of a procedure pointer
1532                    component or type-bound procedure.  */
1533
1534 #include <gmp.h>
1535 #include <mpfr.h>
1536 #define GFC_RND_MODE GMP_RNDN
1537
1538 typedef struct gfc_expr
1539 {
1540   expr_t expr_type;
1541
1542   gfc_typespec ts;      /* These two refer to the overall expression */
1543
1544   int rank;
1545   mpz_t *shape;         /* Can be NULL if shape is unknown at compile time */
1546
1547   /* Nonnull for functions and structure constructors, the base object for
1548      component-calls.  */
1549   gfc_symtree *symtree;
1550
1551   gfc_ref *ref;
1552
1553   locus where;
1554
1555   /* True if the expression is a call to a function that returns an array,
1556      and if we have decided not to allocate temporary data for that array.
1557      is_boz is true if the integer is regarded as BOZ bitpatten and is_snan
1558      denotes a signalling not-a-number.  */
1559   unsigned int inline_noncopying_intrinsic : 1, is_boz : 1, is_snan : 1;
1560
1561   /* Sometimes, when an error has been emitted, it is necessary to prevent
1562       it from recurring.  */
1563   unsigned int error : 1;
1564
1565   /* Mark and expression where a user operator has been substituted by
1566      a function call in interface.c(gfc_extend_expr).  */
1567   unsigned int user_operator : 1;
1568
1569   /* Used to quickly find a given constructor by its offset.  */
1570   splay_tree con_by_offset;
1571
1572   /* If an expression comes from a Hollerith constant or compile-time
1573      evaluation of a transfer statement, it may have a prescribed target-
1574      memory representation, and these cannot always be backformed from
1575      the value.  */
1576   struct
1577   {
1578     int length;
1579     char *string;
1580   }
1581   representation;
1582
1583   union
1584   {
1585     int logical;
1586
1587     io_kind iokind;
1588
1589     mpz_t integer;
1590
1591     mpfr_t real;
1592
1593     struct
1594     {
1595       mpfr_t r, i;
1596     }
1597     complex;
1598
1599     struct
1600     {
1601       gfc_intrinsic_op op;
1602       gfc_user_op *uop;
1603       struct gfc_expr *op1, *op2;
1604     }
1605     op;
1606
1607     struct
1608     {
1609       gfc_actual_arglist *actual;
1610       const char *name; /* Points to the ultimate name of the function */
1611       gfc_intrinsic_sym *isym;
1612       gfc_symbol *esym;
1613     }
1614     function;
1615
1616     struct
1617     {
1618       gfc_actual_arglist* actual;
1619       gfc_typebound_proc* tbp;
1620       const char* name;
1621     }
1622     compcall;
1623
1624     struct
1625     {
1626       int length;
1627       gfc_char_t *string;
1628     }
1629     character;
1630
1631     struct gfc_constructor *constructor;
1632   }
1633   value;
1634
1635 }
1636 gfc_expr;
1637
1638
1639 #define gfc_get_shape(rank) ((mpz_t *) gfc_getmem((rank)*sizeof(mpz_t)))
1640
1641 /* Structures for information associated with different kinds of
1642    numbers.  The first set of integer parameters define all there is
1643    to know about a particular kind.  The rest of the elements are
1644    computed from the first elements.  */
1645
1646 typedef struct
1647 {
1648   /* Values really representable by the target.  */
1649   mpz_t huge, pedantic_min_int, min_int;
1650
1651   int kind, radix, digits, bit_size, range;
1652
1653   /* True if the C type of the given name maps to this precision.
1654      Note that more than one bit can be set.  */
1655   unsigned int c_char : 1;
1656   unsigned int c_short : 1;
1657   unsigned int c_int : 1;
1658   unsigned int c_long : 1;
1659   unsigned int c_long_long : 1;
1660 }
1661 gfc_integer_info;
1662
1663 extern gfc_integer_info gfc_integer_kinds[];
1664
1665
1666 typedef struct
1667 {
1668   int kind, bit_size;
1669
1670   /* True if the C++ type bool, C99 type _Bool, maps to this precision.  */
1671   unsigned int c_bool : 1;
1672 }
1673 gfc_logical_info;
1674
1675 extern gfc_logical_info gfc_logical_kinds[];
1676
1677
1678 typedef struct
1679 {
1680   mpfr_t epsilon, huge, tiny, subnormal;
1681   int kind, radix, digits, min_exponent, max_exponent;
1682   int range, precision;
1683
1684   /* The precision of the type as reported by GET_MODE_PRECISION.  */
1685   int mode_precision;
1686
1687   /* True if the C type of the given name maps to this precision.
1688      Note that more than one bit can be set.  */
1689   unsigned int c_float : 1;
1690   unsigned int c_double : 1;
1691   unsigned int c_long_double : 1;
1692 }
1693 gfc_real_info;
1694
1695 extern gfc_real_info gfc_real_kinds[];
1696
1697 typedef struct
1698 {
1699   int kind, bit_size;
1700   const char *name;
1701 }
1702 gfc_character_info;
1703
1704 extern gfc_character_info gfc_character_kinds[];
1705
1706
1707 /* Equivalence structures.  Equivalent lvalues are linked along the
1708    *eq pointer, equivalence sets are strung along the *next node.  */
1709 typedef struct gfc_equiv
1710 {
1711   struct gfc_equiv *next, *eq;
1712   gfc_expr *expr;
1713   const char *module;
1714   int used;
1715 }
1716 gfc_equiv;
1717
1718 #define gfc_get_equiv() XCNEW (gfc_equiv)
1719
1720 /* Holds a single equivalence member after processing.  */
1721 typedef struct gfc_equiv_info
1722 {
1723   gfc_symbol *sym;
1724   HOST_WIDE_INT offset;
1725   HOST_WIDE_INT length;
1726   struct gfc_equiv_info *next;
1727 } gfc_equiv_info;
1728
1729 /* Holds equivalence groups, after they have been processed.  */
1730 typedef struct gfc_equiv_list
1731 {
1732   gfc_equiv_info *equiv;
1733   struct gfc_equiv_list *next;
1734 } gfc_equiv_list;
1735
1736 /* gfc_case stores the selector list of a case statement.  The *low
1737    and *high pointers can point to the same expression in the case of
1738    a single value.  If *high is NULL, the selection is from *low
1739    upwards, if *low is NULL the selection is *high downwards.
1740
1741    This structure has separate fields to allow single and double linked
1742    lists of CASEs at the same time.  The singe linked list along the NEXT
1743    field is a list of cases for a single CASE label.  The double linked
1744    list along the LEFT/RIGHT fields is used to detect overlap and to
1745    build a table of the cases for SELECT constructs with a CHARACTER
1746    case expression.  */
1747
1748 typedef struct gfc_case
1749 {
1750   /* Where we saw this case.  */
1751   locus where;
1752   int n;
1753
1754   /* Case range values.  If (low == high), it's a single value.  If one of
1755      the labels is NULL, it's an unbounded case.  If both are NULL, this
1756      represents the default case.  */
1757   gfc_expr *low, *high;
1758
1759   /* Next case label in the list of cases for a single CASE label.  */
1760   struct gfc_case *next;
1761
1762   /* Used for detecting overlap, and for code generation.  */
1763   struct gfc_case *left, *right;
1764
1765   /* True if this case label can never be matched.  */
1766   int unreachable;
1767 }
1768 gfc_case;
1769
1770 #define gfc_get_case() XCNEW (gfc_case)
1771
1772
1773 typedef struct
1774 {
1775   gfc_expr *var, *start, *end, *step;
1776 }
1777 gfc_iterator;
1778
1779 #define gfc_get_iterator() XCNEW (gfc_iterator)
1780
1781
1782 /* Allocation structure for ALLOCATE, DEALLOCATE and NULLIFY statements.  */
1783
1784 typedef struct gfc_alloc
1785 {
1786   gfc_expr *expr;
1787   struct gfc_alloc *next;
1788 }
1789 gfc_alloc;
1790
1791 #define gfc_get_alloc() XCNEW (gfc_alloc)
1792
1793
1794 typedef struct
1795 {
1796   gfc_expr *unit, *file, *status, *access, *form, *recl,
1797     *blank, *position, *action, *delim, *pad, *iostat, *iomsg, *convert,
1798     *decimal, *encoding, *round, *sign, *asynchronous, *id;
1799   gfc_st_label *err;
1800 }
1801 gfc_open;
1802
1803
1804 typedef struct
1805 {
1806   gfc_expr *unit, *status, *iostat, *iomsg;
1807   gfc_st_label *err;
1808 }
1809 gfc_close;
1810
1811
1812 typedef struct
1813 {
1814   gfc_expr *unit, *iostat, *iomsg;
1815   gfc_st_label *err;
1816 }
1817 gfc_filepos;
1818
1819
1820 typedef struct
1821 {
1822   gfc_expr *unit, *file, *iostat, *exist, *opened, *number, *named,
1823     *name, *access, *sequential, *direct, *form, *formatted,
1824     *unformatted, *recl, *nextrec, *blank, *position, *action, *read,
1825     *write, *readwrite, *delim, *pad, *iolength, *iomsg, *convert, *strm_pos,
1826     *asynchronous, *decimal, *encoding, *pending, *round, *sign, *size, *id;
1827
1828   gfc_st_label *err;
1829
1830 }
1831 gfc_inquire;
1832
1833
1834 typedef struct
1835 {
1836   gfc_expr *unit, *iostat, *iomsg, *id;
1837   gfc_st_label *err, *end, *eor;
1838 }
1839 gfc_wait;
1840
1841
1842 typedef struct
1843 {
1844   gfc_expr *io_unit, *format_expr, *rec, *advance, *iostat, *size, *iomsg,
1845            *id, *pos, *asynchronous, *blank, *decimal, *delim, *pad, *round,
1846            *sign, *extra_comma;
1847
1848   gfc_symbol *namelist;
1849   /* A format_label of `format_asterisk' indicates the "*" format */
1850   gfc_st_label *format_label;
1851   gfc_st_label *err, *end, *eor;
1852
1853   locus eor_where, end_where, err_where;
1854 }
1855 gfc_dt;
1856
1857
1858 typedef struct gfc_forall_iterator
1859 {
1860   gfc_expr *var, *start, *end, *stride;
1861   struct gfc_forall_iterator *next;
1862 }
1863 gfc_forall_iterator;
1864
1865
1866 /* Executable statements that fill gfc_code structures.  */
1867 typedef enum
1868 {
1869   EXEC_NOP = 1, EXEC_END_BLOCK, EXEC_ASSIGN, EXEC_LABEL_ASSIGN,
1870   EXEC_POINTER_ASSIGN,
1871   EXEC_GOTO, EXEC_CALL, EXEC_COMPCALL, EXEC_ASSIGN_CALL, EXEC_RETURN,
1872   EXEC_ENTRY, EXEC_PAUSE, EXEC_STOP, EXEC_CONTINUE, EXEC_INIT_ASSIGN,
1873   EXEC_IF, EXEC_ARITHMETIC_IF, EXEC_DO, EXEC_DO_WHILE, EXEC_SELECT,
1874   EXEC_FORALL, EXEC_WHERE, EXEC_CYCLE, EXEC_EXIT,
1875   EXEC_ALLOCATE, EXEC_DEALLOCATE,
1876   EXEC_OPEN, EXEC_CLOSE, EXEC_WAIT,
1877   EXEC_READ, EXEC_WRITE, EXEC_IOLENGTH, EXEC_TRANSFER, EXEC_DT_END,
1878   EXEC_BACKSPACE, EXEC_ENDFILE, EXEC_INQUIRE, EXEC_REWIND, EXEC_FLUSH,
1879   EXEC_OMP_CRITICAL, EXEC_OMP_DO, EXEC_OMP_FLUSH, EXEC_OMP_MASTER,
1880   EXEC_OMP_ORDERED, EXEC_OMP_PARALLEL, EXEC_OMP_PARALLEL_DO,
1881   EXEC_OMP_PARALLEL_SECTIONS, EXEC_OMP_PARALLEL_WORKSHARE,
1882   EXEC_OMP_SECTIONS, EXEC_OMP_SINGLE, EXEC_OMP_WORKSHARE,
1883   EXEC_OMP_ATOMIC, EXEC_OMP_BARRIER, EXEC_OMP_END_NOWAIT,
1884   EXEC_OMP_END_SINGLE, EXEC_OMP_TASK, EXEC_OMP_TASKWAIT
1885 }
1886 gfc_exec_op;
1887
1888 typedef struct gfc_code
1889 {
1890   gfc_exec_op op;
1891
1892   struct gfc_code *block, *next;
1893   locus loc;
1894
1895   gfc_st_label *here, *label, *label2, *label3;
1896   gfc_symtree *symtree;
1897   gfc_expr *expr, *expr2;
1898   /* A name isn't sufficient to identify a subroutine, we need the actual
1899      symbol for the interface definition.
1900   const char *sub_name;  */
1901   gfc_symbol *resolved_sym;
1902   gfc_intrinsic_sym *resolved_isym;
1903
1904   union
1905   {
1906     gfc_actual_arglist *actual;
1907     gfc_case *case_list;
1908     gfc_iterator *iterator;
1909     gfc_alloc *alloc_list;
1910     gfc_open *open;
1911     gfc_close *close;
1912     gfc_filepos *filepos;
1913     gfc_inquire *inquire;
1914     gfc_wait *wait;
1915     gfc_dt *dt;
1916     gfc_forall_iterator *forall_iterator;
1917     struct gfc_code *whichloop;
1918     int stop_code;
1919     gfc_entry_list *entry;
1920     gfc_omp_clauses *omp_clauses;
1921     const char *omp_name;
1922     gfc_namelist *omp_namelist;
1923     bool omp_bool;
1924   }
1925   ext;          /* Points to additional structures required by statement */
1926
1927   /* Backend_decl is used for cycle and break labels in do loops, and
1928      probably for other constructs as well, once we translate them.  */
1929   tree backend_decl;
1930 }
1931 gfc_code;
1932
1933
1934 /* Storage for DATA statements.  */
1935 typedef struct gfc_data_variable
1936 {
1937   gfc_expr *expr;
1938   gfc_iterator iter;
1939   struct gfc_data_variable *list, *next;
1940 }
1941 gfc_data_variable;
1942
1943
1944 typedef struct gfc_data_value
1945 {
1946   mpz_t repeat;
1947   gfc_expr *expr;
1948   struct gfc_data_value *next;
1949 }
1950 gfc_data_value;
1951
1952
1953 typedef struct gfc_data
1954 {
1955   gfc_data_variable *var;
1956   gfc_data_value *value;
1957   locus where;
1958
1959   struct gfc_data *next;
1960 }
1961 gfc_data;
1962
1963
1964 /* Structure for holding compile options */
1965 typedef struct
1966 {
1967   char *module_dir;
1968   gfc_source_form source_form;
1969   /* Maximum line lengths in fixed- and free-form source, respectively.
1970      When fixed_line_length or free_line_length are 0, the whole line is used,
1971      regardless of length.
1972
1973      If the user requests a fixed_line_length <7 then gfc_init_options()
1974      emits a fatal error.  */
1975   int fixed_line_length;
1976   int free_line_length;
1977   /* Maximum number of continuation lines in fixed- and free-form source,
1978      respectively.  */
1979   int max_continue_fixed;
1980   int max_continue_free;
1981   int max_identifier_length;
1982   int dump_parse_tree;
1983
1984   int warn_aliasing;
1985   int warn_ampersand;
1986   int warn_conversion;
1987   int warn_implicit_interface;
1988   int warn_line_truncation;
1989   int warn_surprising;
1990   int warn_tabs;
1991   int warn_underflow;
1992   int warn_intrinsic_shadow;
1993   int warn_intrinsics_std;
1994   int warn_character_truncation;
1995   int warn_array_temp;
1996   int warn_align_commons;
1997   int max_errors;
1998
1999   int flag_all_intrinsics;
2000   int flag_default_double;
2001   int flag_default_integer;
2002   int flag_default_real;
2003   int flag_dollar_ok;
2004   int flag_underscoring;
2005   int flag_second_underscore;
2006   int flag_implicit_none;
2007   int flag_max_stack_var_size;
2008   int flag_max_array_constructor;
2009   int flag_range_check;
2010   int flag_pack_derived;
2011   int flag_repack_arrays;
2012   int flag_preprocessed;
2013   int flag_f2c;
2014   int flag_automatic;
2015   int flag_backslash;
2016   int flag_backtrace;
2017   int flag_allow_leading_underscore;
2018   int flag_dump_core;
2019   int flag_external_blas;
2020   int blas_matmul_limit;
2021   int flag_cray_pointer;
2022   int flag_d_lines;
2023   int flag_openmp;
2024   int flag_sign_zero;
2025   int flag_module_private;
2026   int flag_recursive;
2027   int flag_init_local_zero;
2028   int flag_init_integer;
2029   int flag_init_integer_value;
2030   int flag_init_real;
2031   int flag_init_logical;
2032   int flag_init_character;
2033   char flag_init_character_value;
2034   int flag_align_commons;
2035   int flag_whole_file;
2036
2037   int fpe;
2038   int rtcheck;
2039
2040   int warn_std;
2041   int allow_std;
2042   int fshort_enums;
2043   int convert;
2044   int record_marker;
2045   int max_subrecord_length;
2046 }
2047 gfc_option_t;
2048
2049 extern gfc_option_t gfc_option;
2050
2051 /* Constructor nodes for array and structure constructors.  */
2052 typedef struct gfc_constructor
2053 {
2054   gfc_expr *expr;
2055   gfc_iterator *iterator;
2056   locus where;
2057   struct gfc_constructor *next;
2058   struct
2059   {
2060     mpz_t offset; /* Record the offset of array element which appears in
2061                      data statement like "data a(5)/4/".  */
2062     gfc_component *component; /* Record the component being initialized.  */
2063   }
2064   n;
2065   mpz_t repeat; /* Record the repeat number of initial values in data
2066                  statement like "data a/5*10/".  */
2067 }
2068 gfc_constructor;
2069
2070
2071 typedef struct iterator_stack
2072 {
2073   gfc_symtree *variable;
2074   mpz_t value;
2075   struct iterator_stack *prev;
2076 }
2077 iterator_stack;
2078 extern iterator_stack *iter_stack;
2079
2080
2081 /* Node in the linked list used for storing finalizer procedures.  */
2082
2083 typedef struct gfc_finalizer
2084 {
2085   struct gfc_finalizer* next;
2086   locus where; /* Where the FINAL declaration occurred.  */
2087
2088   /* Up to resolution, we want the gfc_symbol, there we lookup the corresponding
2089      symtree and later need only that.  This way, we can access and call the
2090      finalizers from every context as they should be "always accessible".  I
2091      don't make this a union because we need the information whether proc_sym is
2092      still referenced or not for dereferencing it on deleting a gfc_finalizer
2093      structure.  */
2094   gfc_symbol*  proc_sym;
2095   gfc_symtree* proc_tree;
2096 }
2097 gfc_finalizer;
2098 #define gfc_get_finalizer() XCNEW (gfc_finalizer)
2099
2100
2101 /************************ Function prototypes *************************/
2102
2103 /* decl.c */
2104 bool gfc_in_match_data (void);
2105
2106 /* scanner.c */
2107 void gfc_scanner_done_1 (void);
2108 void gfc_scanner_init_1 (void);
2109
2110 void gfc_add_include_path (const char *, bool, bool);
2111 void gfc_add_intrinsic_modules_path (const char *);
2112 void gfc_release_include_path (void);
2113 FILE *gfc_open_included_file (const char *, bool, bool);
2114 FILE *gfc_open_intrinsic_module (const char *);
2115
2116 int gfc_at_end (void);
2117 int gfc_at_eof (void);
2118 int gfc_at_bol (void);
2119 int gfc_at_eol (void);
2120 void gfc_advance_line (void);
2121 int gfc_check_include (void);
2122 int gfc_define_undef_line (void);
2123
2124 int gfc_wide_is_printable (gfc_char_t);
2125 int gfc_wide_is_digit (gfc_char_t);
2126 int gfc_wide_fits_in_byte (gfc_char_t);
2127 gfc_char_t gfc_wide_tolower (gfc_char_t);
2128 gfc_char_t gfc_wide_toupper (gfc_char_t);
2129 size_t gfc_wide_strlen (const gfc_char_t *);
2130 int gfc_wide_strncasecmp (const gfc_char_t *, const char *, size_t);
2131 gfc_char_t *gfc_wide_memset (gfc_char_t *, gfc_char_t, size_t);
2132 char *gfc_widechar_to_char (const gfc_char_t *, int);
2133 gfc_char_t *gfc_char_to_widechar (const char *);
2134
2135 #define gfc_get_wide_string(n) XCNEWVEC (gfc_char_t, n)
2136
2137 void gfc_skip_comments (void);
2138 gfc_char_t gfc_next_char_literal (int);
2139 gfc_char_t gfc_next_char (void);
2140 char gfc_next_ascii_char (void);
2141 gfc_char_t gfc_peek_char (void);
2142 char gfc_peek_ascii_char (void);
2143 void gfc_error_recovery (void);
2144 void gfc_gobble_whitespace (void);
2145 gfc_try gfc_new_file (void);
2146 const char * gfc_read_orig_filename (const char *, const char **);
2147
2148 extern gfc_source_form gfc_current_form;
2149 extern const char *gfc_source_file;
2150 extern locus gfc_current_locus;
2151
2152 void gfc_start_source_files (void);
2153 void gfc_end_source_files (void);
2154
2155 /* misc.c */
2156 void *gfc_getmem (size_t) ATTRIBUTE_MALLOC;
2157 void gfc_free (void *);
2158 int gfc_terminal_width (void);
2159 void gfc_clear_ts (gfc_typespec *);
2160 FILE *gfc_open_file (const char *);
2161 const char *gfc_basic_typename (bt);
2162 const char *gfc_typename (gfc_typespec *);
2163 const char *gfc_op2string (gfc_intrinsic_op);
2164 const char *gfc_code2string (const mstring *, int);
2165 int gfc_string2code (const mstring *, const char *);
2166 const char *gfc_intent_string (sym_intent);
2167
2168 void gfc_init_1 (void);
2169 void gfc_init_2 (void);
2170 void gfc_done_1 (void);
2171 void gfc_done_2 (void);
2172
2173 int get_c_kind (const char *, CInteropKind_t *);
2174
2175 /* options.c */
2176 unsigned int gfc_init_options (unsigned int, const char **);
2177 int gfc_handle_option (size_t, const char *, int);
2178 bool gfc_post_options (const char **);
2179
2180 /* iresolve.c */
2181 const char * gfc_get_string (const char *, ...) ATTRIBUTE_PRINTF_1;
2182 bool gfc_find_sym_in_expr (gfc_symbol *, gfc_expr *);
2183
2184 /* error.c */
2185
2186 typedef struct gfc_error_buf
2187 {
2188   int flag;
2189   size_t allocated, index;
2190   char *message;
2191 } gfc_error_buf;
2192
2193 void gfc_error_init_1 (void);
2194 void gfc_buffer_error (int);
2195
2196 const char *gfc_print_wide_char (gfc_char_t);
2197
2198 void gfc_warning (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2199 void gfc_warning_now (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2200 void gfc_clear_warning (void);
2201 void gfc_warning_check (void);
2202
2203 void gfc_error (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2204 void gfc_error_now (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2205 void gfc_fatal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_GCC_GFC(1,2);
2206 void gfc_internal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_GCC_GFC(1,2);
2207 void gfc_clear_error (void);
2208 int gfc_error_check (void);
2209 int gfc_error_flag_test (void);
2210
2211 notification gfc_notification_std (int);
2212 gfc_try gfc_notify_std (int, const char *, ...) ATTRIBUTE_GCC_GFC(2,3);
2213
2214 /* A general purpose syntax error.  */
2215 #define gfc_syntax_error(ST)    \
2216   gfc_error ("Syntax error in %s statement at %C", gfc_ascii_statement (ST));
2217
2218 void gfc_push_error (gfc_error_buf *);
2219 void gfc_pop_error (gfc_error_buf *);
2220 void gfc_free_error (gfc_error_buf *);
2221
2222 void gfc_get_errors (int *, int *);
2223
2224 /* arith.c */
2225 void gfc_arith_init_1 (void);
2226 void gfc_arith_done_1 (void);
2227 gfc_expr *gfc_enum_initializer (gfc_expr *, locus);
2228 arith gfc_check_integer_range (mpz_t p, int kind);
2229 bool gfc_check_character_range (gfc_char_t, int);
2230
2231 /* trans-types.c */
2232 gfc_try gfc_check_any_c_kind (gfc_typespec *);
2233 int gfc_validate_kind (bt, int, bool);
2234 extern int gfc_index_integer_kind;
2235 extern int gfc_default_integer_kind;
2236 extern int gfc_max_integer_kind;
2237 extern int gfc_default_real_kind;
2238 extern int gfc_default_double_kind;
2239 extern int gfc_default_character_kind;
2240 extern int gfc_default_logical_kind;
2241 extern int gfc_default_complex_kind;
2242 extern int gfc_c_int_kind;
2243 extern int gfc_intio_kind;
2244 extern int gfc_charlen_int_kind;
2245 extern int gfc_numeric_storage_size;
2246 extern int gfc_character_storage_size;
2247
2248 /* symbol.c */
2249 void gfc_clear_new_implicit (void);
2250 gfc_try gfc_add_new_implicit_range (int, int);
2251 gfc_try gfc_merge_new_implicit (gfc_typespec *);
2252 void gfc_set_implicit_none (void);
2253 void gfc_check_function_type (gfc_namespace *);
2254 bool gfc_is_intrinsic_typename (const char *);
2255
2256 gfc_typespec *gfc_get_default_type (gfc_symbol *, gfc_namespace *);
2257 gfc_try gfc_set_default_type (gfc_symbol *, int, gfc_namespace *);
2258
2259 void gfc_set_sym_referenced (gfc_symbol *);
2260
2261 gfc_try gfc_add_attribute (symbol_attribute *, locus *);
2262 gfc_try gfc_add_allocatable (symbol_attribute *, locus *);
2263 gfc_try gfc_add_dimension (symbol_attribute *, const char *, locus *);
2264 gfc_try gfc_add_external (symbol_attribute *, locus *);
2265 gfc_try gfc_add_intrinsic (symbol_attribute *, locus *);
2266 gfc_try gfc_add_optional (symbol_attribute *, locus *);
2267 gfc_try gfc_add_pointer (symbol_attribute *, locus *);
2268 gfc_try gfc_add_cray_pointer (symbol_attribute *, locus *);
2269 gfc_try gfc_add_cray_pointee (symbol_attribute *, locus *);
2270 gfc_try gfc_mod_pointee_as (gfc_array_spec *);
2271 gfc_try gfc_add_protected (symbol_attribute *, const char *, locus *);
2272 gfc_try gfc_add_result (symbol_attribute *, const char *, locus *);
2273 gfc_try gfc_add_save (symbol_attribute *, const char *, locus *);
2274 gfc_try gfc_add_threadprivate (symbol_attribute *, const char *, locus *);
2275 gfc_try gfc_add_saved_common (symbol_attribute *, locus *);
2276 gfc_try gfc_add_target (symbol_attribute *, locus *);
2277 gfc_try gfc_add_dummy (symbol_attribute *, const char *, locus *);
2278 gfc_try gfc_add_generic (symbol_attribute *, const char *, locus *);
2279 gfc_try gfc_add_common (symbol_attribute *, locus *);
2280 gfc_try gfc_add_in_common (symbol_attribute *, const char *, locus *);
2281 gfc_try gfc_add_in_equivalence (symbol_attribute *, const char *, locus *);
2282 gfc_try gfc_add_data (symbol_attribute *, const char *, locus *);
2283 gfc_try gfc_add_in_namelist (symbol_attribute *, const char *, locus *);
2284 gfc_try gfc_add_sequence (symbol_attribute *, const char *, locus *);
2285 gfc_try gfc_add_elemental (symbol_attribute *, locus *);
2286 gfc_try gfc_add_pure (symbol_attribute *, locus *);
2287 gfc_try gfc_add_recursive (symbol_attribute *, locus *);
2288 gfc_try gfc_add_function (symbol_attribute *, const char *, locus *);
2289 gfc_try gfc_add_subroutine (symbol_attribute *, const char *, locus *);
2290 gfc_try gfc_add_volatile (symbol_attribute *, const char *, locus *);
2291 gfc_try gfc_add_proc (symbol_attribute *attr, const char *name, locus *where);
2292 gfc_try gfc_add_abstract (symbol_attribute* attr, locus* where);
2293
2294 gfc_try gfc_add_access (symbol_attribute *, gfc_access, const char *, locus *);
2295 gfc_try gfc_add_is_bind_c (symbol_attribute *, const char *, locus *, int);
2296 gfc_try gfc_add_extension (symbol_attribute *, locus *);
2297 gfc_try gfc_add_value (symbol_attribute *, const char *, locus *);
2298 gfc_try gfc_add_flavor (symbol_attribute *, sym_flavor, const char *, locus *);
2299 gfc_try gfc_add_entry (symbol_attribute *, const char *, locus *);
2300 gfc_try gfc_add_procedure (symbol_attribute *, procedure_type,
2301                        const char *, locus *);
2302 gfc_try gfc_add_intent (symbol_attribute *, sym_intent, locus *);
2303 gfc_try gfc_add_explicit_interface (gfc_symbol *, ifsrc,
2304                                 gfc_formal_arglist *, locus *);
2305 gfc_try gfc_add_type (gfc_symbol *, gfc_typespec *, locus *);
2306
2307 void gfc_clear_attr (symbol_attribute *);
2308 gfc_try gfc_missing_attr (symbol_attribute *, locus *);
2309 gfc_try gfc_copy_attr (symbol_attribute *, symbol_attribute *, locus *);
2310
2311 gfc_try gfc_add_component (gfc_symbol *, const char *, gfc_component **);
2312 gfc_symbol *gfc_use_derived (gfc_symbol *);
2313 gfc_symtree *gfc_use_derived_tree (gfc_symtree *);
2314 gfc_component *gfc_find_component (gfc_symbol *, const char *, bool, bool);
2315
2316 gfc_st_label *gfc_get_st_label (int);
2317 void gfc_free_st_label (gfc_st_label *);
2318 void gfc_define_st_label (gfc_st_label *, gfc_sl_type, locus *);
2319 gfc_try gfc_reference_st_label (gfc_st_label *, gfc_sl_type);
2320
2321 gfc_expr * gfc_lval_expr_from_sym (gfc_symbol *);
2322
2323 gfc_namespace *gfc_get_namespace (gfc_namespace *, int);
2324 gfc_symtree *gfc_new_symtree (gfc_symtree **, const char *);
2325 gfc_symtree *gfc_find_symtree (gfc_symtree *, const char *);
2326 void gfc_delete_symtree (gfc_symtree **, const char *);
2327 gfc_symtree *gfc_get_unique_symtree (gfc_namespace *);
2328 gfc_user_op *gfc_get_uop (const char *);
2329 gfc_user_op *gfc_find_uop (const char *, gfc_namespace *);
2330 void gfc_free_symbol (gfc_symbol *);
2331 gfc_symbol *gfc_new_symbol (const char *, gfc_namespace *);
2332 int gfc_find_symbol (const char *, gfc_namespace *, int, gfc_symbol **);
2333 int gfc_find_sym_tree (const char *, gfc_namespace *, int, gfc_symtree **);
2334 int gfc_get_symbol (const char *, gfc_namespace *, gfc_symbol **);
2335 gfc_try verify_c_interop (gfc_typespec *);
2336 gfc_try verify_c_interop_param (gfc_symbol *);
2337 gfc_try verify_bind_c_sym (gfc_symbol *, gfc_typespec *, int, gfc_common_head *);
2338 gfc_try verify_bind_c_derived_type (gfc_symbol *);
2339 gfc_try verify_com_block_vars_c_interop (gfc_common_head *);
2340 void generate_isocbinding_symbol (const char *, iso_c_binding_symbol, const char *);
2341 gfc_symbol *get_iso_c_sym (gfc_symbol *, char *, char *, int);
2342 int gfc_get_sym_tree (const char *, gfc_namespace *, gfc_symtree **);
2343 int gfc_get_ha_symbol (const char *, gfc_symbol **);
2344 int gfc_get_ha_sym_tree (const char *, gfc_symtree **);
2345
2346 int gfc_symbols_could_alias (gfc_symbol *, gfc_symbol *);
2347
2348 void gfc_undo_symbols (void);
2349 void gfc_commit_symbols (void);
2350 void gfc_commit_symbol (gfc_symbol *);
2351 void gfc_free_charlen (gfc_charlen *, gfc_charlen *);
2352 void gfc_free_namespace (gfc_namespace *);
2353
2354 void gfc_symbol_init_2 (void);
2355 void gfc_symbol_done_2 (void);
2356
2357 void gfc_traverse_symtree (gfc_symtree *, void (*)(gfc_symtree *));
2358 void gfc_traverse_ns (gfc_namespace *, void (*)(gfc_symbol *));
2359 void gfc_traverse_user_op (gfc_namespace *, void (*)(gfc_user_op *));
2360 void gfc_save_all (gfc_namespace *);
2361
2362 void gfc_symbol_state (void);
2363 void gfc_free_dt_list (void);
2364
2365
2366 gfc_gsymbol *gfc_get_gsymbol (const char *);
2367 gfc_gsymbol *gfc_find_gsymbol (gfc_gsymbol *, const char *);
2368
2369 gfc_symbol* gfc_get_derived_super_type (gfc_symbol*);
2370 gfc_symtree* gfc_find_typebound_proc (gfc_symbol*, gfc_try*, const char*, bool);
2371
2372 void copy_formal_args (gfc_symbol *dest, gfc_symbol *src);
2373
2374 void gfc_free_finalizer (gfc_finalizer *el); /* Needed in resolve.c, too  */
2375
2376 gfc_try gfc_check_symbol_typed (gfc_symbol*, gfc_namespace*, bool, locus);
2377
2378 /* intrinsic.c */
2379 extern int gfc_init_expr;
2380
2381 /* Given a symbol that we have decided is intrinsic, mark it as such
2382    by placing it into a special module that is otherwise impossible to
2383    read or write.  */
2384
2385 #define gfc_intrinsic_symbol(SYM) SYM->module = gfc_get_string ("(intrinsic)")
2386
2387 void gfc_intrinsic_init_1 (void);
2388 void gfc_intrinsic_done_1 (void);
2389
2390 char gfc_type_letter (bt);
2391 gfc_symbol * gfc_get_intrinsic_sub_symbol (const char *);
2392 gfc_try gfc_convert_type (gfc_expr *, gfc_typespec *, int);
2393 gfc_try gfc_convert_type_warn (gfc_expr *, gfc_typespec *, int, int);
2394 gfc_try gfc_convert_chartype (gfc_expr *, gfc_typespec *);
2395 int gfc_generic_intrinsic (const char *);
2396 int gfc_specific_intrinsic (const char *);
2397 bool gfc_is_intrinsic (gfc_symbol*, int, locus);
2398 int gfc_intrinsic_actual_ok (const char *, const bool);
2399 gfc_intrinsic_sym *gfc_find_function (const char *);
2400 gfc_intrinsic_sym *gfc_find_subroutine (const char *);
2401
2402 match gfc_intrinsic_func_interface (gfc_expr *, int);
2403 match gfc_intrinsic_sub_interface (gfc_code *, int);
2404
2405 void gfc_warn_intrinsic_shadow (const gfc_symbol*, bool, bool);
2406 gfc_try gfc_check_intrinsic_standard (const gfc_intrinsic_sym*, const char**,
2407                                       bool, locus);
2408
2409 /* match.c -- FIXME */
2410 void gfc_free_iterator (gfc_iterator *, int);
2411 void gfc_free_forall_iterator (gfc_forall_iterator *);
2412 void gfc_free_alloc_list (gfc_alloc *);
2413 void gfc_free_namelist (gfc_namelist *);
2414 void gfc_free_equiv (gfc_equiv *);
2415 void gfc_free_data (gfc_data *);
2416 void gfc_free_case_list (gfc_case *);
2417
2418 /* matchexp.c -- FIXME too?  */
2419 gfc_expr *gfc_get_parentheses (gfc_expr *);
2420
2421 /* openmp.c */
2422 void gfc_free_omp_clauses (gfc_omp_clauses *);
2423 void gfc_resolve_omp_directive (gfc_code *, gfc_namespace *);
2424 void gfc_resolve_do_iterator (gfc_code *, gfc_symbol *);
2425 void gfc_resolve_omp_parallel_blocks (gfc_code *, gfc_namespace *);
2426 void gfc_resolve_omp_do_blocks (gfc_code *, gfc_namespace *);
2427
2428 /* expr.c */
2429 void gfc_free_actual_arglist (gfc_actual_arglist *);
2430 gfc_actual_arglist *gfc_copy_actual_arglist (gfc_actual_arglist *);
2431 const char *gfc_extract_int (gfc_expr *, int *);
2432 gfc_expr *gfc_expr_to_initialize (gfc_expr *);
2433 bool is_subref_array (gfc_expr *);
2434
2435 gfc_expr *gfc_build_conversion (gfc_expr *);
2436 void gfc_free_ref_list (gfc_ref *);
2437 void gfc_type_convert_binary (gfc_expr *);
2438 int gfc_is_constant_expr (gfc_expr *);
2439 gfc_try gfc_simplify_expr (gfc_expr *, int);
2440 int gfc_has_vector_index (gfc_expr *);
2441
2442 gfc_expr *gfc_get_expr (void);
2443 void gfc_free_expr (gfc_expr *);
2444 void gfc_replace_expr (gfc_expr *, gfc_expr *);
2445 gfc_expr *gfc_int_expr (int);
2446 gfc_expr *gfc_logical_expr (int, locus *);
2447 mpz_t *gfc_copy_shape (mpz_t *, int);
2448 mpz_t *gfc_copy_shape_excluding (mpz_t *, int, gfc_expr *);
2449 gfc_expr *gfc_copy_expr (gfc_expr *);
2450 gfc_ref* gfc_copy_ref (gfc_ref*);
2451
2452 gfc_try gfc_specification_expr (gfc_expr *);
2453
2454 int gfc_numeric_ts (gfc_typespec *);
2455 int gfc_kind_max (gfc_expr *, gfc_expr *);
2456
2457 gfc_try gfc_check_conformance (const char *, gfc_expr *, gfc_expr *);
2458 gfc_try gfc_check_assign (gfc_expr *, gfc_expr *, int);
2459 gfc_try gfc_check_pointer_assign (gfc_expr *, gfc_expr *);
2460 gfc_try gfc_check_assign_symbol (gfc_symbol *, gfc_expr *);
2461
2462 gfc_expr *gfc_default_initializer (gfc_typespec *);
2463 gfc_expr *gfc_get_variable_expr (gfc_symtree *);
2464
2465 bool gfc_traverse_expr (gfc_expr *, gfc_symbol *,
2466                         bool (*)(gfc_expr *, gfc_symbol *, int*),
2467                         int);
2468 void gfc_expr_set_symbols_referenced (gfc_expr *);
2469 gfc_try gfc_expr_check_typed (gfc_expr*, gfc_namespace*, bool);
2470 void gfc_expr_replace_symbols (gfc_expr *, gfc_symbol *);
2471
2472 /* st.c */
2473 extern gfc_code new_st;
2474
2475 void gfc_clear_new_st (void);
2476 gfc_code *gfc_get_code (void);
2477 gfc_code *gfc_append_code (gfc_code *, gfc_code *);
2478 void gfc_free_statement (gfc_code *);
2479 void gfc_free_statements (gfc_code *);
2480
2481 /* resolve.c */
2482 gfc_try gfc_resolve_expr (gfc_expr *);
2483 void gfc_resolve (gfc_namespace *);
2484 void gfc_resolve_blocks (gfc_code *, gfc_namespace *);
2485 int gfc_impure_variable (gfc_symbol *);
2486 int gfc_pure (gfc_symbol *);
2487 int gfc_elemental (gfc_symbol *);
2488 gfc_try gfc_resolve_iterator (gfc_iterator *, bool);
2489 gfc_try find_forall_index (gfc_expr *, gfc_symbol *, int);
2490 gfc_try gfc_resolve_index (gfc_expr *, int);
2491 gfc_try gfc_resolve_dim_arg (gfc_expr *);
2492 int gfc_is_formal_arg (void);
2493 void gfc_resolve_substring_charlen (gfc_expr *);
2494 match gfc_iso_c_sub_interface(gfc_code *, gfc_symbol *);
2495
2496
2497 /* array.c */
2498 void gfc_free_array_spec (gfc_array_spec *);
2499 gfc_array_ref *gfc_copy_array_ref (gfc_array_ref *);
2500
2501 gfc_try gfc_set_array_spec (gfc_symbol *, gfc_array_spec *, locus *);
2502 gfc_array_spec *gfc_copy_array_spec (gfc_array_spec *);
2503 gfc_try gfc_resolve_array_spec (gfc_array_spec *, int);
2504
2505 int gfc_compare_array_spec (gfc_array_spec *, gfc_array_spec *);
2506
2507 gfc_expr *gfc_start_constructor (bt, int, locus *);
2508 void gfc_append_constructor (gfc_expr *, gfc_expr *);
2509 void gfc_free_constructor (gfc_constructor *);
2510 void gfc_simplify_iterator_var (gfc_expr *);
2511 gfc_try gfc_expand_constructor (gfc_expr *);
2512 int gfc_constant_ac (gfc_expr *);
2513 int gfc_expanded_ac (gfc_expr *);
2514 gfc_try gfc_resolve_character_array_constructor (gfc_expr *);
2515 gfc_try gfc_resolve_array_constructor (gfc_expr *);
2516 gfc_try gfc_check_constructor_type (gfc_expr *);
2517 gfc_try gfc_check_iter_variable (gfc_expr *);
2518 gfc_try gfc_check_constructor (gfc_expr *, gfc_try (*)(gfc_expr *));
2519 gfc_constructor *gfc_copy_constructor (gfc_constructor *);
2520 gfc_expr *gfc_get_array_element (gfc_expr *, int);
2521 gfc_try gfc_array_size (gfc_expr *, mpz_t *);
2522 gfc_try gfc_array_dimen_size (gfc_expr *, int, mpz_t *);
2523 gfc_try gfc_array_ref_shape (gfc_array_ref *, mpz_t *);
2524 gfc_array_ref *gfc_find_array_ref (gfc_expr *);
2525 void gfc_insert_constructor (gfc_expr *, gfc_constructor *);
2526 gfc_constructor *gfc_get_constructor (void);
2527 tree gfc_conv_array_initializer (tree type, gfc_expr *);
2528 gfc_try spec_size (gfc_array_spec *, mpz_t *);
2529 gfc_try spec_dimen_size (gfc_array_spec *, int, mpz_t *);
2530 int gfc_is_compile_time_shape (gfc_array_spec *);
2531
2532 gfc_try gfc_ref_dimen_size (gfc_array_ref *, int dimen, mpz_t *);
2533
2534
2535 /* interface.c -- FIXME: some of these should be in symbol.c */
2536 void gfc_free_interface (gfc_interface *);
2537 int gfc_compare_derived_types (gfc_symbol *, gfc_symbol *);
2538 int gfc_compare_types (gfc_typespec *, gfc_typespec *);
2539 int gfc_compare_interfaces (gfc_symbol*, gfc_symbol*, int);
2540 void gfc_check_interfaces (gfc_namespace *);
2541 void gfc_procedure_use (gfc_symbol *, gfc_actual_arglist **, locus *);
2542 gfc_symbol *gfc_search_interface (gfc_interface *, int,
2543                                   gfc_actual_arglist **);
2544 gfc_try gfc_extend_expr (gfc_expr *);
2545 void gfc_free_formal_arglist (gfc_formal_arglist *);
2546 gfc_try gfc_extend_assign (gfc_code *, gfc_namespace *);
2547 gfc_try gfc_add_interface (gfc_symbol *);
2548 gfc_interface *gfc_current_interface_head (void);
2549 void gfc_set_current_interface_head (gfc_interface *);
2550 gfc_symtree* gfc_find_sym_in_symtree (gfc_symbol*);
2551 bool gfc_arglist_matches_symbol (gfc_actual_arglist**, gfc_symbol*);
2552
2553 /* io.c */
2554 extern gfc_st_label format_asterisk;
2555
2556 void gfc_free_open (gfc_open *);
2557 gfc_try gfc_resolve_open (gfc_open *);
2558 void gfc_free_close (gfc_close *);
2559 gfc_try gfc_resolve_close (gfc_close *);
2560 void gfc_free_filepos (gfc_filepos *);
2561 gfc_try gfc_resolve_filepos (gfc_filepos *);
2562 void gfc_free_inquire (gfc_inquire *);
2563 gfc_try gfc_resolve_inquire (gfc_inquire *);
2564 void gfc_free_dt (gfc_dt *);
2565 gfc_try gfc_resolve_dt (gfc_dt *);
2566 void gfc_free_wait (gfc_wait *);
2567 gfc_try gfc_resolve_wait (gfc_wait *);
2568
2569 /* module.c */
2570 void gfc_module_init_2 (void);
2571 void gfc_module_done_2 (void);
2572 void gfc_dump_module (const char *, int);
2573 bool gfc_check_access (gfc_access, gfc_access);
2574 void gfc_free_use_stmts (gfc_use_list *);
2575
2576 /* primary.c */
2577 symbol_attribute gfc_variable_attr (gfc_expr *, gfc_typespec *);
2578 symbol_attribute gfc_expr_attr (gfc_expr *);
2579 match gfc_match_rvalue (gfc_expr **);
2580 match gfc_match_varspec (gfc_expr*, int, bool);
2581 int gfc_check_digit (char, int);
2582
2583 /* trans.c */
2584 void gfc_generate_code (gfc_namespace *);
2585 void gfc_generate_module_code (gfc_namespace *);
2586
2587 /* bbt.c */
2588 typedef int (*compare_fn) (void *, void *);
2589 void gfc_insert_bbt (void *, void *, compare_fn);
2590 void gfc_delete_bbt (void *, void *, compare_fn);
2591
2592 /* dump-parse-tree.c */
2593 void gfc_dump_parse_tree (gfc_namespace *, FILE *);
2594
2595 /* parse.c */
2596 gfc_try gfc_parse_file (void);
2597 void gfc_global_used (gfc_gsymbol *, locus *);
2598
2599 /* dependency.c */
2600 int gfc_dep_compare_expr (gfc_expr *, gfc_expr *);
2601 int gfc_is_data_pointer (gfc_expr *);
2602
2603 /* check.c */
2604 gfc_try gfc_check_same_strlen (const gfc_expr*, const gfc_expr*, const char*);
2605
2606 #endif /* GCC_GFORTRAN_H  */