gcc/fortran/gfortran.h

   1 /* gfortran header file
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
   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
 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
 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,
 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_LEN,
 421   GFC_ISYM_LEN_TRIM,
 422   GFC_ISYM_LGAMMA,
 423   GFC_ISYM_LGE,
 424   GFC_ISYM_LGT,
 425   GFC_ISYM_LINK,
 426   GFC_ISYM_LLE,
 427   GFC_ISYM_LLT,
 428   GFC_ISYM_LOC,
 429   GFC_ISYM_LOG,
 430   GFC_ISYM_LOG10,
 431   GFC_ISYM_LOGICAL,
 432   GFC_ISYM_LONG,
 433   GFC_ISYM_LSHIFT,
 434   GFC_ISYM_LSTAT,
 435   GFC_ISYM_LTIME,
 436   GFC_ISYM_MALLOC,
 437   GFC_ISYM_MATMUL,
 438   GFC_ISYM_MAX,
 439   GFC_ISYM_MAXEXPONENT,
 440   GFC_ISYM_MAXLOC,
 441   GFC_ISYM_MAXVAL,
 442   GFC_ISYM_MCLOCK,
 443   GFC_ISYM_MCLOCK8,
 444   GFC_ISYM_MERGE,
 445   GFC_ISYM_MIN,
 446   GFC_ISYM_MINEXPONENT,
 447   GFC_ISYM_MINLOC,
 448   GFC_ISYM_MINVAL,
 449   GFC_ISYM_MOD,
 450   GFC_ISYM_MODULO,
 451   GFC_ISYM_MOVE_ALLOC,
 452   GFC_ISYM_MVBITS,
 453   GFC_ISYM_NEAREST,
 454   GFC_ISYM_NEW_LINE,
 455   GFC_ISYM_NINT,
 456   GFC_ISYM_NOT,
 457   GFC_ISYM_NULL,
 458   GFC_ISYM_OR,
 459   GFC_ISYM_PACK,
 460   GFC_ISYM_PERROR,
 461   GFC_ISYM_PRECISION,
 462   GFC_ISYM_PRESENT,
 463   GFC_ISYM_PRODUCT,
 464   GFC_ISYM_RADIX,
 465   GFC_ISYM_RAND,
 466   GFC_ISYM_RANDOM_NUMBER,
 467   GFC_ISYM_RANDOM_SEED,
 468   GFC_ISYM_RANGE,
 469   GFC_ISYM_REAL,
 470   GFC_ISYM_RENAME,
 471   GFC_ISYM_REPEAT,
 472   GFC_ISYM_RESHAPE,
 473   GFC_ISYM_RRSPACING,
 474   GFC_ISYM_RSHIFT,
 475   GFC_ISYM_SC_KIND,
 476   GFC_ISYM_SCALE,
 477   GFC_ISYM_SCAN,
 478   GFC_ISYM_SECNDS,
 479   GFC_ISYM_SECOND,
 480   GFC_ISYM_SET_EXPONENT,
 481   GFC_ISYM_SHAPE,
 482   GFC_ISYM_SIGN,
 483   GFC_ISYM_SIGNAL,
 484   GFC_ISYM_SI_KIND,
 485   GFC_ISYM_SIN,
 486   GFC_ISYM_SINH,
 487   GFC_ISYM_SIZE,
 488   GFC_ISYM_SLEEP,
 489   GFC_ISYM_SIZEOF,
 490   GFC_ISYM_SPACING,
 491   GFC_ISYM_SPREAD,
 492   GFC_ISYM_SQRT,
 493   GFC_ISYM_SRAND,
 494   GFC_ISYM_SR_KIND,
 495   GFC_ISYM_STAT,
 496   GFC_ISYM_SUM,
 497   GFC_ISYM_SYMLINK,
 498   GFC_ISYM_SYMLNK,
 499   GFC_ISYM_SYSTEM,
 500   GFC_ISYM_SYSTEM_CLOCK,
 501   GFC_ISYM_TAN,
 502   GFC_ISYM_TANH,
 503   GFC_ISYM_TIME,
 504   GFC_ISYM_TIME8,
 505   GFC_ISYM_TINY,
 506   GFC_ISYM_TRANSFER,
 507   GFC_ISYM_TRANSPOSE,
 508   GFC_ISYM_TRIM,
 509   GFC_ISYM_TTYNAM,
 510   GFC_ISYM_UBOUND,
 511   GFC_ISYM_UMASK,
 512   GFC_ISYM_UNLINK,
 513   GFC_ISYM_UNPACK,
 514   GFC_ISYM_VERIFY,
 515   GFC_ISYM_XOR,
 516   GFC_ISYM_Y0,
 517   GFC_ISYM_Y1,
 518   GFC_ISYM_YN
 519 };
 520 typedef enum gfc_isym_id gfc_isym_id;
 521
 522
 523 typedef enum
 524 {
 525   GFC_INIT_REAL_OFF = 0,
 526   GFC_INIT_REAL_ZERO,
 527   GFC_INIT_REAL_NAN,
 528   GFC_INIT_REAL_INF,
 529   GFC_INIT_REAL_NEG_INF
 530 }
 531 init_local_real;
 532
 533 typedef enum
 534 {
 535   GFC_INIT_LOGICAL_OFF = 0,
 536   GFC_INIT_LOGICAL_FALSE,
 537   GFC_INIT_LOGICAL_TRUE
 538 }
 539 init_local_logical;
 540
 541 typedef enum
 542 {
 543   GFC_INIT_CHARACTER_OFF = 0,
 544   GFC_INIT_CHARACTER_ON
 545 }
 546 init_local_character;
 547
 548 typedef enum
 549 {
 550   GFC_INIT_INTEGER_OFF = 0,
 551   GFC_INIT_INTEGER_ON
 552 }
 553 init_local_integer;
 554
 555 /************************* Structures *****************************/
 556
 557 /* Used for keeping things in balanced binary trees.  */
 558 #define BBT_HEADER(self) int priority; struct self *left, *right
 559
 560 #define NAMED_INTCST(a,b,c,d) a,
 561 typedef enum
 562 {
 563   ISOFORTRANENV_INVALID = -1,
 564 #include "iso-fortran-env.def"
 565   ISOFORTRANENV_LAST, ISOFORTRANENV_NUMBER = ISOFORTRANENV_LAST
 566 }
 567 iso_fortran_env_symbol;
 568 #undef NAMED_INTCST
 569
 570 #define NAMED_INTCST(a,b,c,d) a,
 571 #define NAMED_REALCST(a,b,c) a,
 572 #define NAMED_CMPXCST(a,b,c) a,
 573 #define NAMED_LOGCST(a,b,c) a,
 574 #define NAMED_CHARKNDCST(a,b,c) a,
 575 #define NAMED_CHARCST(a,b,c) a,
 576 #define DERIVED_TYPE(a,b,c) a,
 577 #define PROCEDURE(a,b) a,
 578 typedef enum
 579 {
 580   ISOCBINDING_INVALID = -1,
 581 #include "iso-c-binding.def"
 582   ISOCBINDING_LAST,
 583   ISOCBINDING_NUMBER = ISOCBINDING_LAST
 584 }
 585 iso_c_binding_symbol;
 586 #undef NAMED_INTCST
 587 #undef NAMED_REALCST
 588 #undef NAMED_CMPXCST
 589 #undef NAMED_LOGCST
 590 #undef NAMED_CHARKNDCST
 591 #undef NAMED_CHARCST
 592 #undef DERIVED_TYPE
 593 #undef PROCEDURE
 594
 595 typedef enum
 596 {
 597   INTMOD_NONE = 0, INTMOD_ISO_FORTRAN_ENV, INTMOD_ISO_C_BINDING
 598 }
 599 intmod_id;
 600
 601 typedef struct
 602 {
 603   char name[GFC_MAX_SYMBOL_LEN + 1];
 604   int value;  /* Used for both integer and character values.  */
 605   bt f90_type;
 606 }
 607 CInteropKind_t;
 608
 609 /* Array of structs, where the structs represent the C interop kinds.
 610    The list will be implemented based on a hash of the kind name since
 611    these could be accessed multiple times.
 612    Declared in trans-types.c as a global, since it's in that file
 613    that the list is initialized.  */
 614 extern CInteropKind_t c_interop_kinds_table[];
 615
 616 /* Symbol attribute structure.  */
 617 typedef struct
 618 {
 619   /* Variable attributes.  */
 620   unsigned allocatable:1, dimension:1, external:1, intrinsic:1,
 621     optional:1, pointer:1, target:1, value:1, volatile_:1,
 622     dummy:1, result:1, assign:1, threadprivate:1, not_always_present:1,
 623     implied_index:1, subref_array_pointer:1, proc_pointer:1;
 624
 625   ENUM_BITFIELD (save_state) save:2;
 626
 627   unsigned data:1,              /* Symbol is named in a DATA statement.  */
 628     is_protected:1,             /* Symbol has been marked as protected.  */
 629     use_assoc:1,                /* Symbol has been use-associated.  */
 630     use_only:1,                 /* Symbol has been use-associated, with ONLY.  */
 631     use_rename:1,               /* Symbol has been use-associated and renamed.  */
 632     imported:1;                 /* Symbol has been associated by IMPORT.  */
 633
 634   unsigned in_namelist:1, in_common:1, in_equivalence:1;
 635   unsigned function:1, subroutine:1, procedure:1;
 636   unsigned generic:1, generic_copy:1;
 637   unsigned implicit_type:1;     /* Type defined via implicit rules.  */
 638   unsigned untyped:1;           /* No implicit type could be found.  */
 639
 640   unsigned is_bind_c:1;         /* say if is bound to C */
 641   unsigned extension:1;         /* extends a derived type */
 642
 643   /* These flags are both in the typespec and attribute.  The attribute
 644      list is what gets read from/written to a module file.  The typespec
 645      is created from a decl being processed.  */
 646   unsigned is_c_interop:1;      /* It's c interoperable.  */
 647   unsigned is_iso_c:1;          /* Symbol is from iso_c_binding.  */
 648
 649   /* Function/subroutine attributes */
 650   unsigned sequence:1, elemental:1, pure:1, recursive:1;
 651   unsigned unmaskable:1, masked:1, contained:1, mod_proc:1, abstract:1;
 652
 653   /* This is set if the subroutine doesn't return.  Currently, this
 654      is only possible for intrinsic subroutines.  */
 655   unsigned noreturn:1;
 656
 657   /* Set if this procedure is an alternate entry point.  These procedures
 658      don't have any code associated, and the backend will turn them into
 659      thunks to the master function.  */
 660   unsigned entry:1;
 661
 662   /* Set if this is the master function for a procedure with multiple
 663      entry points.  */
 664   unsigned entry_master:1;
 665
 666   /* Set if this is the master function for a function with multiple
 667      entry points where characteristics of the entry points differ.  */
 668   unsigned mixed_entry_master:1;
 669
 670   /* Set if a function must always be referenced by an explicit interface.  */
 671   unsigned always_explicit:1;
 672
 673   /* Set if the symbol has been referenced in an expression.  No further
 674      modification of type or type parameters is permitted.  */
 675   unsigned referenced:1;
 676
 677   /* Set if the symbol has ambiguous interfaces.  */
 678   unsigned ambiguous_interfaces:1;
 679
 680   /* Set if this is the symbol for the main program.  */
 681   unsigned is_main_program:1;
 682
 683   /* Mutually exclusive multibit attributes.  */
 684   ENUM_BITFIELD (gfc_access) access:2;
 685   ENUM_BITFIELD (sym_intent) intent:2;
 686   ENUM_BITFIELD (sym_flavor) flavor:4;
 687   ENUM_BITFIELD (ifsrc) if_source:2;
 688
 689   ENUM_BITFIELD (procedure_type) proc:3;
 690
 691   /* Special attributes for Cray pointers, pointees.  */
 692   unsigned cray_pointer:1, cray_pointee:1;
 693
 694   /* The symbol is a derived type with allocatable components, pointer
 695      components or private components, possibly nested.  zero_comp
 696      is true if the derived type has no component at all.  */
 697   unsigned alloc_comp:1, pointer_comp:1, private_comp:1, zero_comp:1;
 698
 699   /* The namespace where the VOLATILE attribute has been set.  */
 700   struct gfc_namespace *volatile_ns;
 701 }
 702 symbol_attribute;
 703
 704
 705 /* We need to store source lines as sequences of multibyte source
 706    characters. We define here a type wide enough to hold any multibyte
 707    source character, just like libcpp does.  A 32-bit type is enough.  */
 708
 709 #if HOST_BITS_PER_INT >= 32
 710 typedef unsigned int gfc_char_t;
 711 #elif HOST_BITS_PER_LONG >= 32
 712 typedef unsigned long gfc_char_t;
 713 #elif defined(HAVE_LONG_LONG) && (HOST_BITS_PER_LONGLONG >= 32)
 714 typedef unsigned long long gfc_char_t;
 715 #else
 716 # error "Cannot find an integer type with at least 32 bits"
 717 #endif
 718
 719
 720 /* The following three structures are used to identify a location in
 721    the sources.
 722
 723    gfc_file is used to maintain a tree of the source files and how
 724    they include each other
 725
 726    gfc_linebuf holds a single line of source code and information
 727    which file it resides in
 728
 729    locus point to the sourceline and the character in the source
 730    line.
 731 */
 732
 733 typedef struct gfc_file
 734 {
 735   struct gfc_file *next, *up;
 736   int inclusion_line, line;
 737   char *filename;
 738 } gfc_file;
 739
 740 typedef struct gfc_linebuf
 741 {
 742   source_location location;
 743   struct gfc_file *file;
 744   struct gfc_linebuf *next;
 745
 746   int truncated;
 747   bool dbg_emitted;
 748
 749   gfc_char_t line[1];
 750 } gfc_linebuf;
 751
 752 #define gfc_linebuf_header_size (offsetof (gfc_linebuf, line))
 753
 754 #define gfc_linebuf_linenum(LBUF) (LOCATION_LINE ((LBUF)->location))
 755
 756 typedef struct
 757 {
 758   gfc_char_t *nextc;
 759   gfc_linebuf *lb;
 760 } locus;
 761
 762 /* In order for the "gfc" format checking to work correctly, you must
 763    have declared a typedef locus first.  */
 764 #if GCC_VERSION >= 4001
 765 #define ATTRIBUTE_GCC_GFC(m, n) __attribute__ ((__format__ (__gcc_gfc__, m, n))) ATTRIBUTE_NONNULL(m)
 766 #else
 767 #define ATTRIBUTE_GCC_GFC(m, n) ATTRIBUTE_NONNULL(m)
 768 #endif
 769
 770
 771 extern int gfc_suppress_error;
 772
 773
 774 /* Character length structures hold the expression that gives the
 775    length of a character variable.  We avoid putting these into
 776    gfc_typespec because doing so prevents us from doing structure
 777    copies and forces us to deallocate any typespecs we create, as well
 778    as structures that contain typespecs.  They also can have multiple
 779    character typespecs pointing to them.
 780
 781    These structures form a singly linked list within the current
 782    namespace and are deallocated with the namespace.  It is possible to
 783    end up with gfc_charlen structures that have nothing pointing to them.  */
 784
 785 typedef struct gfc_charlen
 786 {
 787   struct gfc_expr *length;
 788   struct gfc_charlen *next;
 789   bool length_from_typespec; /* Length from explicit array ctor typespec?  */
 790   tree backend_decl;
 791
 792   int resolved;
 793 }
 794 gfc_charlen;
 795
 796 #define gfc_get_charlen() XCNEW (gfc_charlen)
 797
 798 /* Type specification structure.  FIXME: derived and cl could be union???  */
 799 typedef struct
 800 {
 801   bt type;
 802   int kind;
 803   struct gfc_symbol *derived;
 804   gfc_charlen *cl;      /* For character types only.  */
 805   struct gfc_symbol *interface; /* For PROCEDURE declarations.  */
 806   int is_c_interop;
 807   int is_iso_c;
 808   bt f90_type;
 809 }
 810 gfc_typespec;
 811
 812 /* Array specification.  */
 813 typedef struct
 814 {
 815   int rank;     /* A rank of zero means that a variable is a scalar.  */
 816   array_type type;
 817   struct gfc_expr *lower[GFC_MAX_DIMENSIONS], *upper[GFC_MAX_DIMENSIONS];
 818
 819   /* These two fields are used with the Cray Pointer extension.  */
 820   bool cray_pointee; /* True iff this spec belongs to a cray pointee.  */
 821   bool cp_was_assumed; /* AS_ASSUMED_SIZE cp arrays are converted to
 822                         AS_EXPLICIT, but we want to remember that we
 823                         did this.  */
 824
 825 }
 826 gfc_array_spec;
 827
 828 #define gfc_get_array_spec() XCNEW (gfc_array_spec)
 829
 830
 831 /* Components of derived types.  */
 832 typedef struct gfc_component
 833 {
 834   const char *name;
 835   gfc_typespec ts;
 836
 837   symbol_attribute attr;
 838   gfc_array_spec *as;
 839
 840   tree backend_decl;
 841   locus loc;
 842   struct gfc_expr *initializer;
 843   struct gfc_component *next;
 844 }
 845 gfc_component;
 846
 847 #define gfc_get_component() XCNEW (gfc_component)
 848
 849 /* Formal argument lists are lists of symbols.  */
 850 typedef struct gfc_formal_arglist
 851 {
 852   /* Symbol representing the argument at this position in the arglist.  */
 853   struct gfc_symbol *sym;
 854   /* Points to the next formal argument.  */
 855   struct gfc_formal_arglist *next;
 856 }
 857 gfc_formal_arglist;
 858
 859 #define gfc_get_formal_arglist() XCNEW (gfc_formal_arglist)
 860
 861
 862 /* The gfc_actual_arglist structure is for actual arguments.  */
 863 typedef struct gfc_actual_arglist
 864 {
 865   const char *name;
 866   /* Alternate return label when the expr member is null.  */
 867   struct gfc_st_label *label;
 868
 869   /* This is set to the type of an eventual omitted optional
 870      argument. This is used to determine if a hidden string length
 871      argument has to be added to a function call.  */
 872   bt missing_arg_type;
 873
 874   struct gfc_expr *expr;
 875   struct gfc_actual_arglist *next;
 876 }
 877 gfc_actual_arglist;
 878
 879 #define gfc_get_actual_arglist() XCNEW (gfc_actual_arglist)
 880
 881
 882 /* Because a symbol can belong to multiple namelists, they must be
 883    linked externally to the symbol itself.  */
 884 typedef struct gfc_namelist
 885 {
 886   struct gfc_symbol *sym;
 887   struct gfc_namelist *next;
 888 }
 889 gfc_namelist;
 890
 891 #define gfc_get_namelist() XCNEW (gfc_namelist)
 892
 893 enum
 894 {
 895   OMP_LIST_PRIVATE,
 896   OMP_LIST_FIRSTPRIVATE,
 897   OMP_LIST_LASTPRIVATE,
 898   OMP_LIST_COPYPRIVATE,
 899   OMP_LIST_SHARED,
 900   OMP_LIST_COPYIN,
 901   OMP_LIST_PLUS,
 902   OMP_LIST_REDUCTION_FIRST = OMP_LIST_PLUS,
 903   OMP_LIST_MULT,
 904   OMP_LIST_SUB,
 905   OMP_LIST_AND,
 906   OMP_LIST_OR,
 907   OMP_LIST_EQV,
 908   OMP_LIST_NEQV,
 909   OMP_LIST_MAX,
 910   OMP_LIST_MIN,
 911   OMP_LIST_IAND,
 912   OMP_LIST_IOR,
 913   OMP_LIST_IEOR,
 914   OMP_LIST_REDUCTION_LAST = OMP_LIST_IEOR,
 915   OMP_LIST_NUM
 916 };
 917
 918 /* Because a symbol can belong to multiple namelists, they must be
 919    linked externally to the symbol itself.  */
 920 typedef struct gfc_omp_clauses
 921 {
 922   struct gfc_expr *if_expr;
 923   struct gfc_expr *num_threads;
 924   gfc_namelist *lists[OMP_LIST_NUM];
 925   enum
 926     {
 927       OMP_SCHED_NONE,
 928       OMP_SCHED_STATIC,
 929       OMP_SCHED_DYNAMIC,
 930       OMP_SCHED_GUIDED,
 931       OMP_SCHED_RUNTIME,
 932       OMP_SCHED_AUTO
 933     } sched_kind;
 934   struct gfc_expr *chunk_size;
 935   enum
 936     {
 937       OMP_DEFAULT_UNKNOWN,
 938       OMP_DEFAULT_NONE,
 939       OMP_DEFAULT_PRIVATE,
 940       OMP_DEFAULT_SHARED,
 941       OMP_DEFAULT_FIRSTPRIVATE
 942     } default_sharing;
 943   int collapse;
 944   bool nowait, ordered, untied;
 945 }
 946 gfc_omp_clauses;
 947
 948 #define gfc_get_omp_clauses() XCNEW (gfc_omp_clauses)
 949
 950
 951 /* The gfc_st_label structure is a doubly linked list attached to a
 952    namespace that records the usage of statement labels within that
 953    space.  */
 954 /* TODO: Make format/statement specifics a union.  */
 955 typedef struct gfc_st_label
 956 {
 957   BBT_HEADER(gfc_st_label);
 958
 959   int value;
 960
 961   gfc_sl_type defined, referenced;
 962
 963   struct gfc_expr *format;
 964
 965   tree backend_decl;
 966
 967   locus where;
 968 }
 969 gfc_st_label;
 970
 971
 972 /* gfc_interface()-- Interfaces are lists of symbols strung together.  */
 973 typedef struct gfc_interface
 974 {
 975   struct gfc_symbol *sym;
 976   locus where;
 977   struct gfc_interface *next;
 978 }
 979 gfc_interface;
 980
 981 #define gfc_get_interface() XCNEW (gfc_interface)
 982
 983 /* User operator nodes.  These are like stripped down symbols.  */
 984 typedef struct
 985 {
 986   const char *name;
 987
 988   gfc_interface *op;
 989   struct gfc_namespace *ns;
 990   gfc_access access;
 991 }
 992 gfc_user_op;
 993
 994
 995 /* Data needed for type-bound procedures.  */
 996 typedef struct
 997 {
 998   struct gfc_symtree* target;
 999   locus where; /* Where the PROCEDURE definition was.  */
1000
1001   gfc_access access;
1002   char* pass_arg; /* Argument-name for PASS.  NULL if not specified.  */
1003
1004   /* Once resolved, we use the position of pass_arg in the formal arglist of
1005      the binding-target procedure to identify it.  The first argument has
1006      number 0 here, the second 1, and so on.  */
1007   unsigned pass_arg_num;
1008
1009   unsigned nopass:1; /* Whether we have NOPASS (PASS otherwise).  */
1010   unsigned non_overridable:1;
1011 }
1012 gfc_typebound_proc;
1013
1014
1015 /* Symbol nodes.  These are important things.  They are what the
1016    standard refers to as "entities".  The possibly multiple names that
1017    refer to the same entity are accomplished by a binary tree of
1018    symtree structures that is balanced by the red-black method-- more
1019    than one symtree node can point to any given symbol.  */
1020
1021 typedef struct gfc_symbol
1022 {
1023   const char *name;     /* Primary name, before renaming */
1024   const char *module;   /* Module this symbol came from */
1025   locus declared_at;
1026
1027   gfc_typespec ts;
1028   symbol_attribute attr;
1029
1030   /* The formal member points to the formal argument list if the
1031      symbol is a function or subroutine name.  If the symbol is a
1032      generic name, the generic member points to the list of
1033      interfaces.  */
1034
1035   gfc_interface *generic;
1036   gfc_access component_access;
1037
1038   gfc_formal_arglist *formal;
1039   struct gfc_namespace *formal_ns;
1040   struct gfc_namespace *f2k_derived;
1041
1042   struct gfc_expr *value;       /* Parameter/Initializer value */
1043   gfc_array_spec *as;
1044   struct gfc_symbol *result;    /* function result symbol */
1045   gfc_component *components;    /* Derived type components */
1046
1047   /* Defined only for Cray pointees; points to their pointer.  */
1048   struct gfc_symbol *cp_pointer;
1049
1050   struct gfc_symbol *common_next;       /* Links for COMMON syms */
1051
1052   /* This is in fact a gfc_common_head but it is only used for pointer
1053      comparisons to check if symbols are in the same common block.  */
1054   struct gfc_common_head* common_head;
1055
1056   /* Make sure setup code for dummy arguments is generated in the correct
1057      order.  */
1058   int dummy_order;
1059
1060   int entry_id;
1061
1062   gfc_namelist *namelist, *namelist_tail;
1063
1064   /* Change management fields.  Symbols that might be modified by the
1065      current statement have the mark member nonzero and are kept in a
1066      singly linked list through the tlink field.  Of these symbols,
1067      symbols with old_symbol equal to NULL are symbols created within
1068      the current statement.  Otherwise, old_symbol points to a copy of
1069      the old symbol.  */
1070
1071   struct gfc_symbol *old_symbol, *tlink;
1072   unsigned mark:1, gfc_new:1;
1073   /* Nonzero if all equivalences associated with this symbol have been
1074      processed.  */
1075   unsigned equiv_built:1;
1076   /* Set if this variable is used as an index name in a FORALL.  */
1077   unsigned forall_index:1;
1078   int refs;
1079   struct gfc_namespace *ns;     /* namespace containing this symbol */
1080
1081   tree backend_decl;
1082
1083   /* Identity of the intrinsic module the symbol comes from, or
1084      INTMOD_NONE if it's not imported from a intrinsic module.  */
1085   intmod_id from_intmod;
1086   /* Identity of the symbol from intrinsic modules, from enums maintained
1087      separately by each intrinsic module.  Used together with from_intmod,
1088      it uniquely identifies a symbol from an intrinsic module.  */
1089   int intmod_sym_id;
1090
1091   /* This may be repetitive, since the typespec now has a binding
1092      label field.  */
1093   char binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
1094   /* Store a reference to the common_block, if this symbol is in one.  */
1095   struct gfc_common_head *common_block;
1096 }
1097 gfc_symbol;
1098
1099
1100 /* This structure is used to keep track of symbols in common blocks.  */
1101 typedef struct gfc_common_head
1102 {
1103   locus where;
1104   char use_assoc, saved, threadprivate;
1105   char name[GFC_MAX_SYMBOL_LEN + 1];
1106   struct gfc_symbol *head;
1107   char binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
1108   int is_bind_c;
1109 }
1110 gfc_common_head;
1111
1112 #define gfc_get_common_head() XCNEW (gfc_common_head)
1113
1114
1115 /* A list of all the alternate entry points for a procedure.  */
1116
1117 typedef struct gfc_entry_list
1118 {
1119   /* The symbol for this entry point.  */
1120   gfc_symbol *sym;
1121   /* The zero-based id of this entry point.  */
1122   int id;
1123   /* The LABEL_EXPR marking this entry point.  */
1124   tree label;
1125   /* The nest item in the list.  */
1126   struct gfc_entry_list *next;
1127 }
1128 gfc_entry_list;
1129
1130 #define gfc_get_entry_list() \
1131   (gfc_entry_list *) gfc_getmem(sizeof(gfc_entry_list))
1132
1133 /* Within a namespace, symbols are pointed to by symtree nodes that
1134    are linked together in a balanced binary tree.  There can be
1135    several symtrees pointing to the same symbol node via USE
1136    statements.  */
1137
1138 typedef struct gfc_symtree
1139 {
1140   BBT_HEADER (gfc_symtree);
1141   const char *name;
1142   int ambiguous;
1143   union
1144   {
1145     gfc_symbol *sym;            /* Symbol associated with this node */
1146     gfc_user_op *uop;
1147     gfc_common_head *common;
1148   }
1149   n;
1150
1151   /* Data for type-bound procedures; NULL if no type-bound procedure.  */
1152   gfc_typebound_proc* typebound;
1153 }
1154 gfc_symtree;
1155
1156 /* A linked list of derived types in the namespace.  */
1157 typedef struct gfc_dt_list
1158 {
1159   struct gfc_symbol *derived;
1160   struct gfc_dt_list *next;
1161 }
1162 gfc_dt_list;
1163
1164 #define gfc_get_dt_list() XCNEW (gfc_dt_list)
1165
1166   /* A list of all derived types.  */
1167   extern gfc_dt_list *gfc_derived_types;
1168
1169 /* A namespace describes the contents of procedure, module or
1170    interface block.  */
1171 /* ??? Anything else use these?  */
1172
1173 typedef struct gfc_namespace
1174 {
1175   /* Tree containing all the symbols in this namespace.  */
1176   gfc_symtree *sym_root;
1177   /* Tree containing all the user-defined operators in the namespace.  */
1178   gfc_symtree *uop_root;
1179   /* Tree containing all the common blocks.  */
1180   gfc_symtree *common_root;
1181   /* Linked list of finalizer procedures.  */
1182   struct gfc_finalizer *finalizers;
1183
1184   /* If set_flag[letter] is set, an implicit type has been set for letter.  */
1185   int set_flag[GFC_LETTERS];
1186   /* Keeps track of the implicit types associated with the letters.  */
1187   gfc_typespec default_type[GFC_LETTERS];
1188
1189   /* If this is a namespace of a procedure, this points to the procedure.  */
1190   struct gfc_symbol *proc_name;
1191   /* If this is the namespace of a unit which contains executable
1192      code, this points to it.  */
1193   struct gfc_code *code;
1194
1195   /* Points to the equivalences set up in this namespace.  */
1196   struct gfc_equiv *equiv;
1197
1198   /* Points to the equivalence groups produced by trans_common.  */
1199   struct gfc_equiv_list *equiv_lists;
1200
1201   gfc_interface *op[GFC_INTRINSIC_OPS];
1202
1203   /* Points to the parent namespace, i.e. the namespace of a module or
1204      procedure in which the procedure belonging to this namespace is
1205      contained. The parent namespace points to this namespace either
1206      directly via CONTAINED, or indirectly via the chain built by
1207      SIBLING.  */
1208   struct gfc_namespace *parent;
1209   /* CONTAINED points to the first contained namespace. Sibling
1210      namespaces are chained via SIBLING.  */
1211   struct gfc_namespace  *contained, *sibling;
1212
1213   gfc_common_head blank_common;
1214   gfc_access default_access, operator_access[GFC_INTRINSIC_OPS];
1215
1216   gfc_st_label *st_labels;
1217   /* This list holds information about all the data initializers in
1218      this namespace.  */
1219   struct gfc_data *data;
1220
1221   gfc_charlen *cl_list;
1222
1223   int save_all, seen_save, seen_implicit_none;
1224
1225   /* Normally we don't need to refcount namespaces.  However when we read
1226      a module containing a function with multiple entry points, this
1227      will appear as several functions with the same formal namespace.  */
1228   int refs;
1229
1230   /* A list of all alternate entry points to this procedure (or NULL).  */
1231   gfc_entry_list *entries;
1232
1233   /* Set to 1 if namespace is a BLOCK DATA program unit.  */
1234   int is_block_data;
1235
1236   /* Set to 1 if namespace is an interface body with "IMPORT" used.  */
1237   int has_import_set;
1238 }
1239 gfc_namespace;
1240
1241 extern gfc_namespace *gfc_current_ns;
1242
1243 /* Global symbols are symbols of global scope. Currently we only use
1244    this to detect collisions already when parsing.
1245    TODO: Extend to verify procedure calls.  */
1246
1247 typedef struct gfc_gsymbol
1248 {
1249   BBT_HEADER(gfc_gsymbol);
1250
1251   const char *name;
1252   const char *sym_name;
1253   const char *mod_name;
1254   const char *binding_label;
1255   enum { GSYM_UNKNOWN=1, GSYM_PROGRAM, GSYM_FUNCTION, GSYM_SUBROUTINE,
1256         GSYM_MODULE, GSYM_COMMON, GSYM_BLOCK_DATA } type;
1257
1258   int defined, used;
1259   locus where;
1260 }
1261 gfc_gsymbol;
1262
1263 extern gfc_gsymbol *gfc_gsym_root;
1264
1265 /* Information on interfaces being built.  */
1266 typedef struct
1267 {
1268   interface_type type;
1269   gfc_symbol *sym;
1270   gfc_namespace *ns;
1271   gfc_user_op *uop;
1272   gfc_intrinsic_op op;
1273 }
1274 gfc_interface_info;
1275
1276 extern gfc_interface_info current_interface;
1277
1278
1279 /* Array reference.  */
1280 typedef struct gfc_array_ref
1281 {
1282   ar_type type;
1283   int dimen;                    /* # of components in the reference */
1284   locus where;
1285   gfc_array_spec *as;
1286
1287   locus c_where[GFC_MAX_DIMENSIONS];    /* All expressions can be NULL */
1288   struct gfc_expr *start[GFC_MAX_DIMENSIONS], *end[GFC_MAX_DIMENSIONS],
1289     *stride[GFC_MAX_DIMENSIONS];
1290
1291   enum
1292   { DIMEN_ELEMENT = 1, DIMEN_RANGE, DIMEN_VECTOR, DIMEN_UNKNOWN }
1293   dimen_type[GFC_MAX_DIMENSIONS];
1294
1295   struct gfc_expr *offset;
1296 }
1297 gfc_array_ref;
1298
1299 #define gfc_get_array_ref() XCNEW (gfc_array_ref)
1300
1301
1302 /* Component reference nodes.  A variable is stored as an expression
1303    node that points to the base symbol.  After that, a singly linked
1304    list of component reference nodes gives the variable's complete
1305    resolution.  The array_ref component may be present and comes
1306    before the component component.  */
1307
1308 typedef enum
1309   { REF_ARRAY, REF_COMPONENT, REF_SUBSTRING }
1310 ref_type;
1311
1312 typedef struct gfc_ref
1313 {
1314   ref_type type;
1315
1316   union
1317   {
1318     struct gfc_array_ref ar;
1319
1320     struct
1321     {
1322       gfc_component *component;
1323       gfc_symbol *sym;
1324     }
1325     c;
1326
1327     struct
1328     {
1329       struct gfc_expr *start, *end;     /* Substring */
1330       gfc_charlen *length;
1331     }
1332     ss;
1333
1334   }
1335   u;
1336
1337   struct gfc_ref *next;
1338 }
1339 gfc_ref;
1340
1341 #define gfc_get_ref() XCNEW (gfc_ref)
1342
1343
1344 /* Structures representing intrinsic symbols and their arguments lists.  */
1345 typedef struct gfc_intrinsic_arg
1346 {
1347   char name[GFC_MAX_SYMBOL_LEN + 1];
1348
1349   gfc_typespec ts;
1350   int optional;
1351   gfc_actual_arglist *actual;
1352
1353   struct gfc_intrinsic_arg *next;
1354
1355 }
1356 gfc_intrinsic_arg;
1357
1358
1359 /* Specifies the various kinds of check functions used to verify the
1360    argument lists of intrinsic functions. fX with X an integer refer
1361    to check functions of intrinsics with X arguments. f1m is used for
1362    the MAX and MIN intrinsics which can have an arbitrary number of
1363    arguments, f3ml is used for the MINLOC and MAXLOC intrinsics as
1364    these have special semantics.  */
1365
1366 typedef union
1367 {
1368   gfc_try (*f0)(void);
1369   gfc_try (*f1)(struct gfc_expr *);
1370   gfc_try (*f1m)(gfc_actual_arglist *);
1371   gfc_try (*f2)(struct gfc_expr *, struct gfc_expr *);
1372   gfc_try (*f3)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1373   gfc_try (*f3ml)(gfc_actual_arglist *);
1374   gfc_try (*f3red)(gfc_actual_arglist *);
1375   gfc_try (*f4)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1376             struct gfc_expr *);
1377   gfc_try (*f5)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1378             struct gfc_expr *, struct gfc_expr *);
1379 }
1380 gfc_check_f;
1381
1382 /* Like gfc_check_f, these specify the type of the simplification
1383    function associated with an intrinsic. The fX are just like in
1384    gfc_check_f. cc is used for type conversion functions.  */
1385
1386 typedef union
1387 {
1388   struct gfc_expr *(*f0)(void);
1389   struct gfc_expr *(*f1)(struct gfc_expr *);
1390   struct gfc_expr *(*f2)(struct gfc_expr *, struct gfc_expr *);
1391   struct gfc_expr *(*f3)(struct gfc_expr *, struct gfc_expr *,
1392                          struct gfc_expr *);
1393   struct gfc_expr *(*f4)(struct gfc_expr *, struct gfc_expr *,
1394                          struct gfc_expr *, struct gfc_expr *);
1395   struct gfc_expr *(*f5)(struct gfc_expr *, struct gfc_expr *,
1396                          struct gfc_expr *, struct gfc_expr *,
1397                          struct gfc_expr *);
1398   struct gfc_expr *(*cc)(struct gfc_expr *, bt, int);
1399 }
1400 gfc_simplify_f;
1401
1402 /* Again like gfc_check_f, these specify the type of the resolution
1403    function associated with an intrinsic. The fX are just like in
1404    gfc_check_f. f1m is used for MIN and MAX, s1 is used for abort().  */
1405
1406 typedef union
1407 {
1408   void (*f0)(struct gfc_expr *);
1409   void (*f1)(struct gfc_expr *, struct gfc_expr *);
1410   void (*f1m)(struct gfc_expr *, struct gfc_actual_arglist *);
1411   void (*f2)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1412   void (*f3)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1413              struct gfc_expr *);
1414   void (*f4)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1415              struct gfc_expr *, struct gfc_expr *);
1416   void (*f5)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1417              struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1418   void (*s1)(struct gfc_code *);
1419 }
1420 gfc_resolve_f;
1421
1422
1423 typedef struct gfc_intrinsic_sym
1424 {
1425   const char *name, *lib_name;
1426   gfc_intrinsic_arg *formal;
1427   gfc_typespec ts;
1428   unsigned elemental:1, inquiry:1, transformational:1, pure:1,
1429     generic:1, specific:1, actual_ok:1, noreturn:1, conversion:1;
1430
1431   int standard;
1432
1433   gfc_simplify_f simplify;
1434   gfc_check_f check;
1435   gfc_resolve_f resolve;
1436   struct gfc_intrinsic_sym *specific_head, *next;
1437   gfc_isym_id id;
1438
1439 }
1440 gfc_intrinsic_sym;
1441
1442
1443 /* Expression nodes.  The expression node types deserve explanations,
1444    since the last couple can be easily misconstrued:
1445
1446    EXPR_OP         Operator node pointing to one or two other nodes
1447    EXPR_FUNCTION   Function call, symbol points to function's name
1448    EXPR_CONSTANT   A scalar constant: Logical, String, Real, Int or Complex
1449    EXPR_VARIABLE   An Lvalue with a root symbol and possible reference list
1450                    which expresses structure, array and substring refs.
1451    EXPR_NULL       The NULL pointer value (which also has a basic type).
1452    EXPR_SUBSTRING  A substring of a constant string
1453    EXPR_STRUCTURE  A structure constructor
1454    EXPR_ARRAY      An array constructor.  */
1455
1456 #include <gmp.h>
1457 #include <mpfr.h>
1458 #define GFC_RND_MODE GMP_RNDN
1459
1460 typedef struct gfc_expr
1461 {
1462   expr_t expr_type;
1463
1464   gfc_typespec ts;      /* These two refer to the overall expression */
1465
1466   int rank;
1467   mpz_t *shape;         /* Can be NULL if shape is unknown at compile time */
1468
1469   /* Nonnull for functions and structure constructors */
1470   gfc_symtree *symtree;
1471
1472   gfc_ref *ref;
1473
1474   locus where;
1475
1476   /* True if the expression is a call to a function that returns an array,
1477      and if we have decided not to allocate temporary data for that array.  */
1478   unsigned int inline_noncopying_intrinsic : 1, is_boz : 1;
1479
1480   /* Used to quickly find a given constructor by its offset.  */
1481   splay_tree con_by_offset;
1482
1483   /* If an expression comes from a Hollerith constant or compile-time
1484      evaluation of a transfer statement, it may have a prescribed target-
1485      memory representation, and these cannot always be backformed from
1486      the value.  */
1487   struct
1488   {
1489     int length;
1490     char *string;
1491   }
1492   representation;
1493
1494   union
1495   {
1496     int logical;
1497
1498     io_kind iokind;
1499
1500     mpz_t integer;
1501
1502     mpfr_t real;
1503
1504     struct
1505     {
1506       mpfr_t r, i;
1507     }
1508     complex;
1509
1510     struct
1511     {
1512       gfc_intrinsic_op op;
1513       gfc_user_op *uop;
1514       struct gfc_expr *op1, *op2;
1515     }
1516     op;
1517
1518     struct
1519     {
1520       gfc_actual_arglist *actual;
1521       const char *name; /* Points to the ultimate name of the function */
1522       gfc_intrinsic_sym *isym;
1523       gfc_symbol *esym;
1524     }
1525     function;
1526
1527     struct
1528     {
1529       int length;
1530       gfc_char_t *string;
1531     }
1532     character;
1533
1534     struct gfc_constructor *constructor;
1535   }
1536   value;
1537
1538 }
1539 gfc_expr;
1540
1541
1542 #define gfc_get_shape(rank) ((mpz_t *) gfc_getmem((rank)*sizeof(mpz_t)))
1543
1544 /* Structures for information associated with different kinds of
1545    numbers.  The first set of integer parameters define all there is
1546    to know about a particular kind.  The rest of the elements are
1547    computed from the first elements.  */
1548
1549 typedef struct
1550 {
1551   /* Values really representable by the target.  */
1552   mpz_t huge, pedantic_min_int, min_int;
1553
1554   int kind, radix, digits, bit_size, range;
1555
1556   /* True if the C type of the given name maps to this precision.
1557      Note that more than one bit can be set.  */
1558   unsigned int c_char : 1;
1559   unsigned int c_short : 1;
1560   unsigned int c_int : 1;
1561   unsigned int c_long : 1;
1562   unsigned int c_long_long : 1;
1563 }
1564 gfc_integer_info;
1565
1566 extern gfc_integer_info gfc_integer_kinds[];
1567
1568
1569 typedef struct
1570 {
1571   int kind, bit_size;
1572
1573   /* True if the C++ type bool, C99 type _Bool, maps to this precision.  */
1574   unsigned int c_bool : 1;
1575 }
1576 gfc_logical_info;
1577
1578 extern gfc_logical_info gfc_logical_kinds[];
1579
1580
1581 typedef struct
1582 {
1583   mpfr_t epsilon, huge, tiny, subnormal;
1584   int kind, radix, digits, min_exponent, max_exponent;
1585   int range, precision;
1586
1587   /* The precision of the type as reported by GET_MODE_PRECISION.  */
1588   int mode_precision;
1589
1590   /* True if the C type of the given name maps to this precision.
1591      Note that more than one bit can be set.  */
1592   unsigned int c_float : 1;
1593   unsigned int c_double : 1;
1594   unsigned int c_long_double : 1;
1595 }
1596 gfc_real_info;
1597
1598 extern gfc_real_info gfc_real_kinds[];
1599
1600 typedef struct
1601 {
1602   int kind, bit_size;
1603   const char *name;
1604 }
1605 gfc_character_info;
1606
1607 extern gfc_character_info gfc_character_kinds[];
1608
1609
1610 /* Equivalence structures.  Equivalent lvalues are linked along the
1611    *eq pointer, equivalence sets are strung along the *next node.  */
1612 typedef struct gfc_equiv
1613 {
1614   struct gfc_equiv *next, *eq;
1615   gfc_expr *expr;
1616   const char *module;
1617   int used;
1618 }
1619 gfc_equiv;
1620
1621 #define gfc_get_equiv() XCNEW (gfc_equiv)
1622
1623 /* Holds a single equivalence member after processing.  */
1624 typedef struct gfc_equiv_info
1625 {
1626   gfc_symbol *sym;
1627   HOST_WIDE_INT offset;
1628   HOST_WIDE_INT length;
1629   struct gfc_equiv_info *next;
1630 } gfc_equiv_info;
1631
1632 /* Holds equivalence groups, after they have been processed.  */
1633 typedef struct gfc_equiv_list
1634 {
1635   gfc_equiv_info *equiv;
1636   struct gfc_equiv_list *next;
1637 } gfc_equiv_list;
1638
1639 /* gfc_case stores the selector list of a case statement.  The *low
1640    and *high pointers can point to the same expression in the case of
1641    a single value.  If *high is NULL, the selection is from *low
1642    upwards, if *low is NULL the selection is *high downwards.
1643
1644    This structure has separate fields to allow single and double linked
1645    lists of CASEs at the same time.  The singe linked list along the NEXT
1646    field is a list of cases for a single CASE label.  The double linked
1647    list along the LEFT/RIGHT fields is used to detect overlap and to
1648    build a table of the cases for SELECT constructs with a CHARACTER
1649    case expression.  */
1650
1651 typedef struct gfc_case
1652 {
1653   /* Where we saw this case.  */
1654   locus where;
1655   int n;
1656
1657   /* Case range values.  If (low == high), it's a single value.  If one of
1658      the labels is NULL, it's an unbounded case.  If both are NULL, this
1659      represents the default case.  */
1660   gfc_expr *low, *high;
1661
1662   /* Next case label in the list of cases for a single CASE label.  */
1663   struct gfc_case *next;
1664
1665   /* Used for detecting overlap, and for code generation.  */
1666   struct gfc_case *left, *right;
1667
1668   /* True if this case label can never be matched.  */
1669   int unreachable;
1670 }
1671 gfc_case;
1672
1673 #define gfc_get_case() XCNEW (gfc_case)
1674
1675
1676 typedef struct
1677 {
1678   gfc_expr *var, *start, *end, *step;
1679 }
1680 gfc_iterator;
1681
1682 #define gfc_get_iterator() XCNEW (gfc_iterator)
1683
1684
1685 /* Allocation structure for ALLOCATE, DEALLOCATE and NULLIFY statements.  */
1686
1687 typedef struct gfc_alloc
1688 {
1689   gfc_expr *expr;
1690   struct gfc_alloc *next;
1691 }
1692 gfc_alloc;
1693
1694 #define gfc_get_alloc() XCNEW (gfc_alloc)
1695
1696
1697 typedef struct
1698 {
1699   gfc_expr *unit, *file, *status, *access, *form, *recl,
1700     *blank, *position, *action, *delim, *pad, *iostat, *iomsg, *convert,
1701     *decimal, *encoding, *round, *sign, *asynchronous, *id;
1702   gfc_st_label *err;
1703 }
1704 gfc_open;
1705
1706
1707 typedef struct
1708 {
1709   gfc_expr *unit, *status, *iostat, *iomsg;
1710   gfc_st_label *err;
1711 }
1712 gfc_close;
1713
1714
1715 typedef struct
1716 {
1717   gfc_expr *unit, *iostat, *iomsg;
1718   gfc_st_label *err;
1719 }
1720 gfc_filepos;
1721
1722
1723 typedef struct
1724 {
1725   gfc_expr *unit, *file, *iostat, *exist, *opened, *number, *named,
1726     *name, *access, *sequential, *direct, *form, *formatted,
1727     *unformatted, *recl, *nextrec, *blank, *position, *action, *read,
1728     *write, *readwrite, *delim, *pad, *iolength, *iomsg, *convert, *strm_pos,
1729     *asynchronous, *decimal, *encoding, *pending, *round, *sign, *size, *id;
1730
1731   gfc_st_label *err;
1732
1733 }
1734 gfc_inquire;
1735
1736
1737 typedef struct
1738 {
1739   gfc_expr *unit, *iostat, *iomsg, *id;
1740   gfc_st_label *err, *end, *eor;
1741 }
1742 gfc_wait;
1743
1744
1745 typedef struct
1746 {
1747   gfc_expr *io_unit, *format_expr, *rec, *advance, *iostat, *size, *iomsg,
1748            *id, *pos, *asynchronous, *blank, *decimal, *delim, *pad, *round,
1749            *sign, *extra_comma;
1750
1751   gfc_symbol *namelist;
1752   /* A format_label of `format_asterisk' indicates the "*" format */
1753   gfc_st_label *format_label;
1754   gfc_st_label *err, *end, *eor;
1755
1756   locus eor_where, end_where, err_where;
1757 }
1758 gfc_dt;
1759
1760
1761 typedef struct gfc_forall_iterator
1762 {
1763   gfc_expr *var, *start, *end, *stride;
1764   struct gfc_forall_iterator *next;
1765 }
1766 gfc_forall_iterator;
1767
1768
1769 /* Executable statements that fill gfc_code structures.  */
1770 typedef enum
1771 {
1772   EXEC_NOP = 1, EXEC_ASSIGN, EXEC_LABEL_ASSIGN, EXEC_POINTER_ASSIGN,
1773   EXEC_GOTO, EXEC_CALL, EXEC_ASSIGN_CALL, EXEC_RETURN, EXEC_ENTRY,
1774   EXEC_PAUSE, EXEC_STOP, EXEC_CONTINUE, EXEC_INIT_ASSIGN,
1775   EXEC_IF, EXEC_ARITHMETIC_IF, EXEC_DO, EXEC_DO_WHILE, EXEC_SELECT,
1776   EXEC_FORALL, EXEC_WHERE, EXEC_CYCLE, EXEC_EXIT,
1777   EXEC_ALLOCATE, EXEC_DEALLOCATE,
1778   EXEC_OPEN, EXEC_CLOSE, EXEC_WAIT,
1779   EXEC_READ, EXEC_WRITE, EXEC_IOLENGTH, EXEC_TRANSFER, EXEC_DT_END,
1780   EXEC_BACKSPACE, EXEC_ENDFILE, EXEC_INQUIRE, EXEC_REWIND, EXEC_FLUSH,
1781   EXEC_OMP_CRITICAL, EXEC_OMP_DO, EXEC_OMP_FLUSH, EXEC_OMP_MASTER,
1782   EXEC_OMP_ORDERED, EXEC_OMP_PARALLEL, EXEC_OMP_PARALLEL_DO,
1783   EXEC_OMP_PARALLEL_SECTIONS, EXEC_OMP_PARALLEL_WORKSHARE,
1784   EXEC_OMP_SECTIONS, EXEC_OMP_SINGLE, EXEC_OMP_WORKSHARE,
1785   EXEC_OMP_ATOMIC, EXEC_OMP_BARRIER, EXEC_OMP_END_NOWAIT,
1786   EXEC_OMP_END_SINGLE, EXEC_OMP_TASK, EXEC_OMP_TASKWAIT
1787 }
1788 gfc_exec_op;
1789
1790 typedef struct gfc_code
1791 {
1792   gfc_exec_op op;
1793
1794   struct gfc_code *block, *next;
1795   locus loc;
1796
1797   gfc_st_label *here, *label, *label2, *label3;
1798   gfc_symtree *symtree;
1799   gfc_expr *expr, *expr2;
1800   /* A name isn't sufficient to identify a subroutine, we need the actual
1801      symbol for the interface definition.
1802   const char *sub_name;  */
1803   gfc_symbol *resolved_sym;
1804
1805   union
1806   {
1807     gfc_actual_arglist *actual;
1808     gfc_case *case_list;
1809     gfc_iterator *iterator;
1810     gfc_alloc *alloc_list;
1811     gfc_open *open;
1812     gfc_close *close;
1813     gfc_filepos *filepos;
1814     gfc_inquire *inquire;
1815     gfc_wait *wait;
1816     gfc_dt *dt;
1817     gfc_forall_iterator *forall_iterator;
1818     struct gfc_code *whichloop;
1819     int stop_code;
1820     gfc_entry_list *entry;
1821     gfc_omp_clauses *omp_clauses;
1822     const char *omp_name;
1823     gfc_namelist *omp_namelist;
1824     bool omp_bool;
1825   }
1826   ext;          /* Points to additional structures required by statement */
1827
1828   /* Backend_decl is used for cycle and break labels in do loops, and
1829      probably for other constructs as well, once we translate them.  */
1830   tree backend_decl;
1831 }
1832 gfc_code;
1833
1834
1835 /* Storage for DATA statements.  */
1836 typedef struct gfc_data_variable
1837 {
1838   gfc_expr *expr;
1839   gfc_iterator iter;
1840   struct gfc_data_variable *list, *next;
1841 }
1842 gfc_data_variable;
1843
1844
1845 typedef struct gfc_data_value
1846 {
1847   mpz_t repeat;
1848   gfc_expr *expr;
1849   struct gfc_data_value *next;
1850 }
1851 gfc_data_value;
1852
1853
1854 typedef struct gfc_data
1855 {
1856   gfc_data_variable *var;
1857   gfc_data_value *value;
1858   locus where;
1859
1860   struct gfc_data *next;
1861 }
1862 gfc_data;
1863
1864
1865 /* Structure for holding compile options */
1866 typedef struct
1867 {
1868   char *module_dir;
1869   gfc_source_form source_form;
1870   /* Maximum line lengths in fixed- and free-form source, respectively.
1871      When fixed_line_length or free_line_length are 0, the whole line is used,
1872      regardless of length.
1873
1874      If the user requests a fixed_line_length <7 then gfc_init_options()
1875      emits a fatal error.  */
1876   int fixed_line_length;
1877   int free_line_length;
1878   /* Maximum number of continuation lines in fixed- and free-form source,
1879      respectively.  */
1880   int max_continue_fixed;
1881   int max_continue_free;
1882   int max_identifier_length;
1883   int dump_parse_tree;
1884
1885   int warn_aliasing;
1886   int warn_ampersand;
1887   int warn_conversion;
1888   int warn_implicit_interface;
1889   int warn_line_truncation;
1890   int warn_surprising;
1891   int warn_tabs;
1892   int warn_underflow;
1893   int warn_intrinsic_shadow;
1894   int warn_intrinsics_std;
1895   int warn_character_truncation;
1896   int warn_array_temp;
1897   int max_errors;
1898
1899   int flag_all_intrinsics;
1900   int flag_default_double;
1901   int flag_default_integer;
1902   int flag_default_real;
1903   int flag_dollar_ok;
1904   int flag_underscoring;
1905   int flag_second_underscore;
1906   int flag_implicit_none;
1907   int flag_max_stack_var_size;
1908   int flag_range_check;
1909   int flag_pack_derived;
1910   int flag_repack_arrays;
1911   int flag_preprocessed;
1912   int flag_f2c;
1913   int flag_automatic;
1914   int flag_backslash;
1915   int flag_backtrace;
1916   int flag_check_array_temporaries;
1917   int flag_allow_leading_underscore;
1918   int flag_dump_core;
1919   int flag_external_blas;
1920   int blas_matmul_limit;
1921   int flag_cray_pointer;
1922   int flag_d_lines;
1923   int flag_openmp;
1924   int flag_sign_zero;
1925   int flag_module_private;
1926   int flag_recursive;
1927   int flag_init_local_zero;
1928   int flag_init_integer;
1929   int flag_init_integer_value;
1930   int flag_init_real;
1931   int flag_init_logical;
1932   int flag_init_character;
1933   char flag_init_character_value;
1934
1935   int fpe;
1936
1937   int warn_std;
1938   int allow_std;
1939   int fshort_enums;
1940   int convert;
1941   int record_marker;
1942   int max_subrecord_length;
1943 }
1944 gfc_option_t;
1945
1946 extern gfc_option_t gfc_option;
1947
1948 /* Constructor nodes for array and structure constructors.  */
1949 typedef struct gfc_constructor
1950 {
1951   gfc_expr *expr;
1952   gfc_iterator *iterator;
1953   locus where;
1954   struct gfc_constructor *next;
1955   struct
1956   {
1957     mpz_t offset; /* Record the offset of array element which appears in
1958                      data statement like "data a(5)/4/".  */
1959     gfc_component *component; /* Record the component being initialized.  */
1960   }
1961   n;
1962   mpz_t repeat; /* Record the repeat number of initial values in data
1963                  statement like "data a/5*10/".  */
1964 }
1965 gfc_constructor;
1966
1967
1968 typedef struct iterator_stack
1969 {
1970   gfc_symtree *variable;
1971   mpz_t value;
1972   struct iterator_stack *prev;
1973 }
1974 iterator_stack;
1975 extern iterator_stack *iter_stack;
1976
1977
1978 /* Node in the linked list used for storing finalizer procedures.  */
1979
1980 typedef struct gfc_finalizer
1981 {
1982   struct gfc_finalizer* next;
1983   locus where; /* Where the FINAL declaration occurred.  */
1984
1985   /* Up to resolution, we want the gfc_symbol, there we lookup the corresponding
1986      symtree and later need only that.  This way, we can access and call the
1987      finalizers from every context as they should be "always accessible".  I
1988      don't make this a union because we need the information whether proc_sym is
1989      still referenced or not for dereferencing it on deleting a gfc_finalizer
1990      structure.  */
1991   gfc_symbol*  proc_sym;
1992   gfc_symtree* proc_tree;
1993 }
1994 gfc_finalizer;
1995 #define gfc_get_finalizer() XCNEW (gfc_finalizer)
1996
1997
1998 /************************ Function prototypes *************************/
1999
2000 /* decl.c */
2001 bool gfc_in_match_data (void);
2002
2003 /* scanner.c */
2004 void gfc_scanner_done_1 (void);
2005 void gfc_scanner_init_1 (void);
2006
2007 void gfc_add_include_path (const char *, bool);
2008 void gfc_add_intrinsic_modules_path (const char *);
2009 void gfc_release_include_path (void);
2010 FILE *gfc_open_included_file (const char *, bool, bool);
2011 FILE *gfc_open_intrinsic_module (const char *);
2012
2013 int gfc_at_end (void);
2014 int gfc_at_eof (void);
2015 int gfc_at_bol (void);
2016 int gfc_at_eol (void);
2017 void gfc_advance_line (void);
2018 int gfc_check_include (void);
2019 int gfc_define_undef_line (void);
2020
2021 int gfc_wide_is_printable (gfc_char_t);
2022 int gfc_wide_is_digit (gfc_char_t);
2023 int gfc_wide_fits_in_byte (gfc_char_t);
2024 gfc_char_t gfc_wide_tolower (gfc_char_t);
2025 gfc_char_t gfc_wide_toupper (gfc_char_t);
2026 size_t gfc_wide_strlen (const gfc_char_t *);
2027 int gfc_wide_strncasecmp (const gfc_char_t *, const char *, size_t);
2028 gfc_char_t *gfc_wide_memset (gfc_char_t *, gfc_char_t, size_t);
2029 char *gfc_widechar_to_char (const gfc_char_t *, int);
2030 gfc_char_t *gfc_char_to_widechar (const char *);
2031
2032 #define gfc_get_wide_string(n) XCNEWVEC (gfc_char_t, n)
2033
2034 void gfc_skip_comments (void);
2035 gfc_char_t gfc_next_char_literal (int);
2036 gfc_char_t gfc_next_char (void);
2037 char gfc_next_ascii_char (void);
2038 gfc_char_t gfc_peek_char (void);
2039 char gfc_peek_ascii_char (void);
2040 void gfc_error_recovery (void);
2041 void gfc_gobble_whitespace (void);
2042 gfc_try gfc_new_file (void);
2043 const char * gfc_read_orig_filename (const char *, const char **);
2044
2045 extern gfc_source_form gfc_current_form;
2046 extern const char *gfc_source_file;
2047 extern locus gfc_current_locus;
2048
2049 void gfc_start_source_files (void);
2050 void gfc_end_source_files (void);
2051
2052 /* misc.c */
2053 void *gfc_getmem (size_t) ATTRIBUTE_MALLOC;
2054 void gfc_free (void *);
2055 int gfc_terminal_width (void);
2056 void gfc_clear_ts (gfc_typespec *);
2057 FILE *gfc_open_file (const char *);
2058 const char *gfc_basic_typename (bt);
2059 const char *gfc_typename (gfc_typespec *);
2060 const char *gfc_op2string (gfc_intrinsic_op);
2061 const char *gfc_code2string (const mstring *, int);
2062 int gfc_string2code (const mstring *, const char *);
2063 const char *gfc_intent_string (sym_intent);
2064
2065 void gfc_init_1 (void);
2066 void gfc_init_2 (void);
2067 void gfc_done_1 (void);
2068 void gfc_done_2 (void);
2069
2070 int get_c_kind (const char *, CInteropKind_t *);
2071
2072 /* options.c */
2073 unsigned int gfc_init_options (unsigned int, const char **);
2074 int gfc_handle_option (size_t, const char *, int);
2075 bool gfc_post_options (const char **);
2076
2077 /* iresolve.c */
2078 const char * gfc_get_string (const char *, ...) ATTRIBUTE_PRINTF_1;
2079 bool gfc_find_sym_in_expr (gfc_symbol *, gfc_expr *);
2080
2081 /* error.c */
2082
2083 typedef struct gfc_error_buf
2084 {
2085   int flag;
2086   size_t allocated, index;
2087   char *message;
2088 } gfc_error_buf;
2089
2090 void gfc_error_init_1 (void);
2091 void gfc_buffer_error (int);
2092
2093 const char *gfc_print_wide_char (gfc_char_t);
2094
2095 void gfc_warning (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2096 void gfc_warning_now (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2097 void gfc_clear_warning (void);
2098 void gfc_warning_check (void);
2099
2100 void gfc_error (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2101 void gfc_error_now (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2102 void gfc_fatal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_GCC_GFC(1,2);
2103 void gfc_internal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_GCC_GFC(1,2);
2104 void gfc_clear_error (void);
2105 int gfc_error_check (void);
2106 int gfc_error_flag_test (void);
2107
2108 notification gfc_notification_std (int);
2109 gfc_try gfc_notify_std (int, const char *, ...) ATTRIBUTE_GCC_GFC(2,3);
2110
2111 /* A general purpose syntax error.  */
2112 #define gfc_syntax_error(ST)    \
2113   gfc_error ("Syntax error in %s statement at %C", gfc_ascii_statement (ST));
2114
2115 void gfc_push_error (gfc_error_buf *);
2116 void gfc_pop_error (gfc_error_buf *);
2117 void gfc_free_error (gfc_error_buf *);
2118
2119 void gfc_get_errors (int *, int *);
2120
2121 /* arith.c */
2122 void gfc_arith_init_1 (void);
2123 void gfc_arith_done_1 (void);
2124 gfc_expr *gfc_enum_initializer (gfc_expr *, locus);
2125 arith gfc_check_integer_range (mpz_t p, int kind);
2126 bool gfc_check_character_range (gfc_char_t, int);
2127
2128 /* trans-types.c */
2129 gfc_try gfc_validate_c_kind (gfc_typespec *);
2130 gfc_try gfc_check_any_c_kind (gfc_typespec *);
2131 int gfc_validate_kind (bt, int, bool);
2132 extern int gfc_index_integer_kind;
2133 extern int gfc_default_integer_kind;
2134 extern int gfc_max_integer_kind;
2135 extern int gfc_default_real_kind;
2136 extern int gfc_default_double_kind;
2137 extern int gfc_default_character_kind;
2138 extern int gfc_default_logical_kind;
2139 extern int gfc_default_complex_kind;
2140 extern int gfc_c_int_kind;
2141 extern int gfc_intio_kind;
2142 extern int gfc_charlen_int_kind;
2143 extern int gfc_numeric_storage_size;
2144 extern int gfc_character_storage_size;
2145
2146 /* symbol.c */
2147 void gfc_clear_new_implicit (void);
2148 gfc_try gfc_add_new_implicit_range (int, int);
2149 gfc_try gfc_merge_new_implicit (gfc_typespec *);
2150 void gfc_set_implicit_none (void);
2151 void gfc_check_function_type (gfc_namespace *);
2152 bool gfc_is_intrinsic_typename (const char *);
2153
2154 gfc_typespec *gfc_get_default_type (gfc_symbol *, gfc_namespace *);
2155 gfc_try gfc_set_default_type (gfc_symbol *, int, gfc_namespace *);
2156
2157 void gfc_set_sym_referenced (gfc_symbol *);
2158
2159 gfc_try gfc_add_attribute (symbol_attribute *, locus *);
2160 gfc_try gfc_add_allocatable (symbol_attribute *, locus *);
2161 gfc_try gfc_add_dimension (symbol_attribute *, const char *, locus *);
2162 gfc_try gfc_add_external (symbol_attribute *, locus *);
2163 gfc_try gfc_add_intrinsic (symbol_attribute *, locus *);
2164 gfc_try gfc_add_optional (symbol_attribute *, locus *);
2165 gfc_try gfc_add_pointer (symbol_attribute *, locus *);
2166 gfc_try gfc_add_cray_pointer (symbol_attribute *, locus *);
2167 gfc_try gfc_add_cray_pointee (symbol_attribute *, locus *);
2168 gfc_try gfc_mod_pointee_as (gfc_array_spec *);
2169 gfc_try gfc_add_protected (symbol_attribute *, const char *, locus *);
2170 gfc_try gfc_add_result (symbol_attribute *, const char *, locus *);
2171 gfc_try gfc_add_save (symbol_attribute *, const char *, locus *);
2172 gfc_try gfc_add_threadprivate (symbol_attribute *, const char *, locus *);
2173 gfc_try gfc_add_saved_common (symbol_attribute *, locus *);
2174 gfc_try gfc_add_target (symbol_attribute *, locus *);
2175 gfc_try gfc_add_dummy (symbol_attribute *, const char *, locus *);
2176 gfc_try gfc_add_generic (symbol_attribute *, const char *, locus *);
2177 gfc_try gfc_add_common (symbol_attribute *, locus *);
2178 gfc_try gfc_add_in_common (symbol_attribute *, const char *, locus *);
2179 gfc_try gfc_add_in_equivalence (symbol_attribute *, const char *, locus *);
2180 gfc_try gfc_add_data (symbol_attribute *, const char *, locus *);
2181 gfc_try gfc_add_in_namelist (symbol_attribute *, const char *, locus *);
2182 gfc_try gfc_add_sequence (symbol_attribute *, const char *, locus *);
2183 gfc_try gfc_add_elemental (symbol_attribute *, locus *);
2184 gfc_try gfc_add_pure (symbol_attribute *, locus *);
2185 gfc_try gfc_add_recursive (symbol_attribute *, locus *);
2186 gfc_try gfc_add_function (symbol_attribute *, const char *, locus *);
2187 gfc_try gfc_add_subroutine (symbol_attribute *, const char *, locus *);
2188 gfc_try gfc_add_volatile (symbol_attribute *, const char *, locus *);
2189 gfc_try gfc_add_proc (symbol_attribute *attr, const char *name, locus *where);
2190
2191 gfc_try gfc_add_access (symbol_attribute *, gfc_access, const char *, locus *);
2192 gfc_try gfc_add_is_bind_c (symbol_attribute *, const char *, locus *, int);
2193 gfc_try gfc_add_extension (symbol_attribute *, locus *);
2194 gfc_try gfc_add_value (symbol_attribute *, const char *, locus *);
2195 gfc_try gfc_add_flavor (symbol_attribute *, sym_flavor, const char *, locus *);
2196 gfc_try gfc_add_entry (symbol_attribute *, const char *, locus *);
2197 gfc_try gfc_add_procedure (symbol_attribute *, procedure_type,
2198                        const char *, locus *);
2199 gfc_try gfc_add_intent (symbol_attribute *, sym_intent, locus *);
2200 gfc_try gfc_add_explicit_interface (gfc_symbol *, ifsrc,
2201                                 gfc_formal_arglist *, locus *);
2202 gfc_try gfc_add_type (gfc_symbol *, gfc_typespec *, locus *);
2203
2204 void gfc_clear_attr (symbol_attribute *);
2205 gfc_try gfc_missing_attr (symbol_attribute *, locus *);
2206 gfc_try gfc_copy_attr (symbol_attribute *, symbol_attribute *, locus *);
2207
2208 gfc_try gfc_add_component (gfc_symbol *, const char *, gfc_component **);
2209 gfc_symbol *gfc_use_derived (gfc_symbol *);
2210 gfc_symtree *gfc_use_derived_tree (gfc_symtree *);
2211 gfc_component *gfc_find_component (gfc_symbol *, const char *);
2212
2213 gfc_st_label *gfc_get_st_label (int);
2214 void gfc_free_st_label (gfc_st_label *);
2215 void gfc_define_st_label (gfc_st_label *, gfc_sl_type, locus *);
2216 gfc_try gfc_reference_st_label (gfc_st_label *, gfc_sl_type);
2217
2218 gfc_expr * gfc_lval_expr_from_sym (gfc_symbol *);
2219
2220 gfc_namespace *gfc_get_namespace (gfc_namespace *, int);
2221 gfc_symtree *gfc_new_symtree (gfc_symtree **, const char *);
2222 gfc_symtree *gfc_find_symtree (gfc_symtree *, const char *);
2223 void gfc_delete_symtree (gfc_symtree **, const char *);
2224 gfc_symtree *gfc_get_unique_symtree (gfc_namespace *);
2225 gfc_user_op *gfc_get_uop (const char *);
2226 gfc_user_op *gfc_find_uop (const char *, gfc_namespace *);
2227 void gfc_free_symbol (gfc_symbol *);
2228 gfc_symbol *gfc_new_symbol (const char *, gfc_namespace *);
2229 int gfc_find_symbol (const char *, gfc_namespace *, int, gfc_symbol **);
2230 int gfc_find_sym_tree (const char *, gfc_namespace *, int, gfc_symtree **);
2231 int gfc_get_symbol (const char *, gfc_namespace *, gfc_symbol **);
2232 gfc_try verify_c_interop (gfc_typespec *, const char *name, locus *where);
2233 gfc_try verify_c_interop_param (gfc_symbol *);
2234 gfc_try verify_bind_c_sym (gfc_symbol *, gfc_typespec *, int, gfc_common_head *);
2235 gfc_try verify_bind_c_derived_type (gfc_symbol *);
2236 gfc_try verify_com_block_vars_c_interop (gfc_common_head *);
2237 void generate_isocbinding_symbol (const char *, iso_c_binding_symbol, const char *);
2238 gfc_symbol *get_iso_c_sym (gfc_symbol *, char *, char *, int);
2239 int gfc_get_sym_tree (const char *, gfc_namespace *, gfc_symtree **);
2240 int gfc_get_ha_symbol (const char *, gfc_symbol **);
2241 int gfc_get_ha_sym_tree (const char *, gfc_symtree **);
2242
2243 int gfc_symbols_could_alias (gfc_symbol *, gfc_symbol *);
2244
2245 void gfc_undo_symbols (void);
2246 void gfc_commit_symbols (void);
2247 void gfc_commit_symbol (gfc_symbol *);
2248 void gfc_free_namespace (gfc_namespace *);
2249
2250 void gfc_symbol_init_2 (void);
2251 void gfc_symbol_done_2 (void);
2252
2253 void gfc_traverse_symtree (gfc_symtree *, void (*)(gfc_symtree *));
2254 void gfc_traverse_ns (gfc_namespace *, void (*)(gfc_symbol *));
2255 void gfc_traverse_user_op (gfc_namespace *, void (*)(gfc_user_op *));
2256 void gfc_save_all (gfc_namespace *);
2257
2258 void gfc_symbol_state (void);
2259
2260 gfc_gsymbol *gfc_get_gsymbol (const char *);
2261 gfc_gsymbol *gfc_find_gsymbol (gfc_gsymbol *, const char *);
2262
2263 gfc_symbol* gfc_get_derived_super_type (gfc_symbol*);
2264 gfc_symtree* gfc_find_typebound_proc (gfc_symbol*, const char*);
2265
2266 void copy_formal_args (gfc_symbol *dest, gfc_symbol *src);
2267
2268 void gfc_free_finalizer (gfc_finalizer *el); /* Needed in resolve.c, too  */
2269
2270 gfc_try gfc_check_symbol_typed (gfc_symbol*, gfc_namespace*, bool, locus);
2271
2272 /* intrinsic.c */
2273 extern int gfc_init_expr;
2274
2275 /* Given a symbol that we have decided is intrinsic, mark it as such
2276    by placing it into a special module that is otherwise impossible to
2277    read or write.  */
2278
2279 #define gfc_intrinsic_symbol(SYM) SYM->module = gfc_get_string ("(intrinsic)")
2280
2281 void gfc_intrinsic_init_1 (void);
2282 void gfc_intrinsic_done_1 (void);
2283
2284 char gfc_type_letter (bt);
2285 gfc_symbol * gfc_get_intrinsic_sub_symbol (const char *);
2286 gfc_try gfc_convert_type (gfc_expr *, gfc_typespec *, int);
2287 gfc_try gfc_convert_type_warn (gfc_expr *, gfc_typespec *, int, int);
2288 gfc_try gfc_convert_chartype (gfc_expr *, gfc_typespec *);
2289 int gfc_generic_intrinsic (const char *);
2290 int gfc_specific_intrinsic (const char *);
2291 bool gfc_is_intrinsic (gfc_symbol*, int, locus);
2292 int gfc_intrinsic_actual_ok (const char *, const bool);
2293 gfc_intrinsic_sym *gfc_find_function (const char *);
2294 gfc_intrinsic_sym *gfc_find_subroutine (const char *);
2295
2296 match gfc_intrinsic_func_interface (gfc_expr *, int);
2297 match gfc_intrinsic_sub_interface (gfc_code *, int);
2298
2299 void gfc_warn_intrinsic_shadow (const gfc_symbol*, bool, bool);
2300 gfc_try gfc_check_intrinsic_standard (const gfc_intrinsic_sym*, const char**,
2301                                       bool, locus);
2302
2303 /* match.c -- FIXME */
2304 void gfc_free_iterator (gfc_iterator *, int);
2305 void gfc_free_forall_iterator (gfc_forall_iterator *);
2306 void gfc_free_alloc_list (gfc_alloc *);
2307 void gfc_free_namelist (gfc_namelist *);
2308 void gfc_free_equiv (gfc_equiv *);
2309 void gfc_free_data (gfc_data *);
2310 void gfc_free_case_list (gfc_case *);
2311
2312 /* matchexp.c -- FIXME too?  */
2313 gfc_expr *gfc_get_parentheses (gfc_expr *);
2314
2315 /* openmp.c */
2316 void gfc_free_omp_clauses (gfc_omp_clauses *);
2317 void gfc_resolve_omp_directive (gfc_code *, gfc_namespace *);
2318 void gfc_resolve_do_iterator (gfc_code *, gfc_symbol *);
2319 void gfc_resolve_omp_parallel_blocks (gfc_code *, gfc_namespace *);
2320 void gfc_resolve_omp_do_blocks (gfc_code *, gfc_namespace *);
2321
2322 /* expr.c */
2323 void gfc_free_actual_arglist (gfc_actual_arglist *);
2324 gfc_actual_arglist *gfc_copy_actual_arglist (gfc_actual_arglist *);
2325 const char *gfc_extract_int (gfc_expr *, int *);
2326 gfc_expr *gfc_expr_to_initialize (gfc_expr *);
2327 bool is_subref_array (gfc_expr *);
2328
2329 gfc_expr *gfc_build_conversion (gfc_expr *);
2330 void gfc_free_ref_list (gfc_ref *);
2331 void gfc_type_convert_binary (gfc_expr *);
2332 int gfc_is_constant_expr (gfc_expr *);
2333 gfc_try gfc_simplify_expr (gfc_expr *, int);
2334 int gfc_has_vector_index (gfc_expr *);
2335
2336 gfc_expr *gfc_get_expr (void);
2337 void gfc_free_expr (gfc_expr *);
2338 void gfc_replace_expr (gfc_expr *, gfc_expr *);
2339 gfc_expr *gfc_int_expr (int);
2340 gfc_expr *gfc_logical_expr (int, locus *);
2341 mpz_t *gfc_copy_shape (mpz_t *, int);
2342 mpz_t *gfc_copy_shape_excluding (mpz_t *, int, gfc_expr *);
2343 gfc_expr *gfc_copy_expr (gfc_expr *);
2344
2345 gfc_try gfc_specification_expr (gfc_expr *);
2346
2347 int gfc_numeric_ts (gfc_typespec *);
2348 int gfc_kind_max (gfc_expr *, gfc_expr *);
2349
2350 gfc_try gfc_check_conformance (const char *, gfc_expr *, gfc_expr *);
2351 gfc_try gfc_check_assign (gfc_expr *, gfc_expr *, int);
2352 gfc_try gfc_check_pointer_assign (gfc_expr *, gfc_expr *);
2353 gfc_try gfc_check_assign_symbol (gfc_symbol *, gfc_expr *);
2354
2355 gfc_expr *gfc_default_initializer (gfc_typespec *);
2356 gfc_expr *gfc_get_variable_expr (gfc_symtree *);
2357
2358 bool gfc_traverse_expr (gfc_expr *, gfc_symbol *,
2359                         bool (*)(gfc_expr *, gfc_symbol *, int*),
2360                         int);
2361 void gfc_expr_set_symbols_referenced (gfc_expr *);
2362
2363 gfc_try gfc_expr_check_typed (gfc_expr*, gfc_namespace*, bool);
2364
2365 /* st.c */
2366 extern gfc_code new_st;
2367
2368 void gfc_clear_new_st (void);
2369 gfc_code *gfc_get_code (void);
2370 gfc_code *gfc_append_code (gfc_code *, gfc_code *);
2371 void gfc_free_statement (gfc_code *);
2372 void gfc_free_statements (gfc_code *);
2373
2374 /* resolve.c */
2375 gfc_try gfc_resolve_expr (gfc_expr *);
2376 void gfc_resolve (gfc_namespace *);
2377 void gfc_resolve_blocks (gfc_code *, gfc_namespace *);
2378 int gfc_impure_variable (gfc_symbol *);
2379 int gfc_pure (gfc_symbol *);
2380 int gfc_elemental (gfc_symbol *);
2381 gfc_try gfc_resolve_iterator (gfc_iterator *, bool);
2382 gfc_try find_forall_index (gfc_expr *, gfc_symbol *, int);
2383 gfc_try gfc_resolve_index (gfc_expr *, int);
2384 gfc_try gfc_resolve_dim_arg (gfc_expr *);
2385 int gfc_is_formal_arg (void);
2386 void gfc_resolve_substring_charlen (gfc_expr *);
2387 match gfc_iso_c_sub_interface(gfc_code *, gfc_symbol *);
2388
2389
2390 /* array.c */
2391 void gfc_free_array_spec (gfc_array_spec *);
2392 gfc_array_ref *gfc_copy_array_ref (gfc_array_ref *);
2393
2394 gfc_try gfc_set_array_spec (gfc_symbol *, gfc_array_spec *, locus *);
2395 gfc_array_spec *gfc_copy_array_spec (gfc_array_spec *);
2396 gfc_try gfc_resolve_array_spec (gfc_array_spec *, int);
2397
2398 int gfc_compare_array_spec (gfc_array_spec *, gfc_array_spec *);
2399
2400 gfc_expr *gfc_start_constructor (bt, int, locus *);
2401 void gfc_append_constructor (gfc_expr *, gfc_expr *);
2402 void gfc_free_constructor (gfc_constructor *);
2403 void gfc_simplify_iterator_var (gfc_expr *);
2404 gfc_try gfc_expand_constructor (gfc_expr *);
2405 int gfc_constant_ac (gfc_expr *);
2406 int gfc_expanded_ac (gfc_expr *);
2407 gfc_try gfc_resolve_character_array_constructor (gfc_expr *);
2408 gfc_try gfc_resolve_array_constructor (gfc_expr *);
2409 gfc_try gfc_check_constructor_type (gfc_expr *);
2410 gfc_try gfc_check_iter_variable (gfc_expr *);
2411 gfc_try gfc_check_constructor (gfc_expr *, gfc_try (*)(gfc_expr *));
2412 gfc_constructor *gfc_copy_constructor (gfc_constructor *);
2413 gfc_expr *gfc_get_array_element (gfc_expr *, int);
2414 gfc_try gfc_array_size (gfc_expr *, mpz_t *);
2415 gfc_try gfc_array_dimen_size (gfc_expr *, int, mpz_t *);
2416 gfc_try gfc_array_ref_shape (gfc_array_ref *, mpz_t *);
2417 gfc_array_ref *gfc_find_array_ref (gfc_expr *);
2418 void gfc_insert_constructor (gfc_expr *, gfc_constructor *);
2419 gfc_constructor *gfc_get_constructor (void);
2420 tree gfc_conv_array_initializer (tree type, gfc_expr *);
2421 gfc_try spec_size (gfc_array_spec *, mpz_t *);
2422 gfc_try spec_dimen_size (gfc_array_spec *, int, mpz_t *);
2423 int gfc_is_compile_time_shape (gfc_array_spec *);
2424
2425 /* interface.c -- FIXME: some of these should be in symbol.c */
2426 void gfc_free_interface (gfc_interface *);
2427 int gfc_compare_derived_types (gfc_symbol *, gfc_symbol *);
2428 int gfc_compare_types (gfc_typespec *, gfc_typespec *);
2429 void gfc_check_interfaces (gfc_namespace *);
2430 void gfc_procedure_use (gfc_symbol *, gfc_actual_arglist **, locus *);
2431 gfc_symbol *gfc_search_interface (gfc_interface *, int,
2432                                   gfc_actual_arglist **);
2433 gfc_try gfc_extend_expr (gfc_expr *);
2434 void gfc_free_formal_arglist (gfc_formal_arglist *);
2435 gfc_try gfc_extend_assign (gfc_code *, gfc_namespace *);
2436 gfc_try gfc_add_interface (gfc_symbol *);
2437 gfc_interface *gfc_current_interface_head (void);
2438 void gfc_set_current_interface_head (gfc_interface *);
2439 gfc_symtree* gfc_find_sym_in_symtree (gfc_symbol*);
2440
2441 /* io.c */
2442 extern gfc_st_label format_asterisk;
2443
2444 void gfc_free_open (gfc_open *);
2445 gfc_try gfc_resolve_open (gfc_open *);
2446 void gfc_free_close (gfc_close *);
2447 gfc_try gfc_resolve_close (gfc_close *);
2448 void gfc_free_filepos (gfc_filepos *);
2449 gfc_try gfc_resolve_filepos (gfc_filepos *);
2450 void gfc_free_inquire (gfc_inquire *);
2451 gfc_try gfc_resolve_inquire (gfc_inquire *);
2452 void gfc_free_dt (gfc_dt *);
2453 gfc_try gfc_resolve_dt (gfc_dt *);
2454 void gfc_free_wait (gfc_wait *);
2455 gfc_try gfc_resolve_wait (gfc_wait *);
2456
2457 /* module.c */
2458 void gfc_module_init_2 (void);
2459 void gfc_module_done_2 (void);
2460 void gfc_dump_module (const char *, int);
2461 bool gfc_check_access (gfc_access, gfc_access);
2462
2463 /* primary.c */
2464 symbol_attribute gfc_variable_attr (gfc_expr *, gfc_typespec *);
2465 symbol_attribute gfc_expr_attr (gfc_expr *);
2466 match gfc_match_rvalue (gfc_expr **);
2467 int gfc_check_digit (char, int);
2468
2469 /* trans.c */
2470 void gfc_generate_code (gfc_namespace *);
2471 void gfc_generate_module_code (gfc_namespace *);
2472
2473 /* bbt.c */
2474 typedef int (*compare_fn) (void *, void *);
2475 void gfc_insert_bbt (void *, void *, compare_fn);
2476 void gfc_delete_bbt (void *, void *, compare_fn);
2477
2478 /* dump-parse-tree.c */
2479 void gfc_dump_parse_tree (gfc_namespace *, FILE *);
2480
2481 /* parse.c */
2482 gfc_try gfc_parse_file (void);
2483 void gfc_global_used (gfc_gsymbol *, locus *);
2484
2485 /* dependency.c */
2486 int gfc_dep_compare_expr (gfc_expr *, gfc_expr *);
2487
2488 #endif /* GCC_GFORTRAN_H  */