gcc/fortran/gfortran.h

   1 /* gfortran header file
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
   3    2009, 2010
   4    Free Software Foundation, Inc.
   5    Contributed by Andy Vaught
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 3, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22
  23 #ifndef GCC_GFORTRAN_H
  24 #define GCC_GFORTRAN_H
  25
  26 /* It's probably insane to have this large of a header file, but it
  27    seemed like everything had to be recompiled anyway when a change
  28    was made to a header file, and there were ordering issues with
  29    multiple header files.  Besides, Microsoft's winnt.h was 250k last
  30    time I looked, so by comparison this is perfectly reasonable.  */
  31
  32 /* Declarations common to the front-end and library are put in
  33    libgfortran/libgfortran_frontend.h  */
  34 #include "libgfortran.h"
  35
  36
  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, BT_LOGICAL, BT_CHARACTER,
 146   BT_DERIVED, BT_CLASS, BT_PROCEDURE, BT_HOLLERITH, BT_VOID
 147 }
 148 bt;
 149
 150 /* Expression node types.  */
 151 typedef enum
 152 { EXPR_OP = 1, EXPR_FUNCTION, EXPR_CONSTANT, EXPR_VARIABLE,
 153   EXPR_SUBSTRING, EXPR_STRUCTURE, EXPR_ARRAY, EXPR_NULL, EXPR_COMPCALL, EXPR_PPC
 154 }
 155 expr_t;
 156
 157 /* Array types.  */
 158 typedef enum
 159 { AS_EXPLICIT = 1, AS_ASSUMED_SHAPE, AS_DEFERRED,
 160   AS_ASSUMED_SIZE, AS_UNKNOWN
 161 }
 162 array_type;
 163
 164 typedef enum
 165 { AR_FULL = 1, AR_ELEMENT, AR_SECTION, AR_UNKNOWN }
 166 ar_type;
 167
 168 /* Statement label types.  */
 169 typedef enum
 170 { ST_LABEL_UNKNOWN = 1, ST_LABEL_TARGET,
 171   ST_LABEL_BAD_TARGET, ST_LABEL_FORMAT
 172 }
 173 gfc_sl_type;
 174
 175 /* Intrinsic operators.  */
 176 typedef enum
 177 { GFC_INTRINSIC_BEGIN = 0,
 178   INTRINSIC_NONE = -1, INTRINSIC_UPLUS = GFC_INTRINSIC_BEGIN,
 179   INTRINSIC_UMINUS, INTRINSIC_PLUS, INTRINSIC_MINUS, INTRINSIC_TIMES,
 180   INTRINSIC_DIVIDE, INTRINSIC_POWER, INTRINSIC_CONCAT,
 181   INTRINSIC_AND, INTRINSIC_OR, INTRINSIC_EQV, INTRINSIC_NEQV,
 182   /* ==, /=, >, >=, <, <=  */
 183   INTRINSIC_EQ, INTRINSIC_NE, INTRINSIC_GT, INTRINSIC_GE,
 184   INTRINSIC_LT, INTRINSIC_LE,
 185   /* .EQ., .NE., .GT., .GE., .LT., .LE. (OS = Old-Style)  */
 186   INTRINSIC_EQ_OS, INTRINSIC_NE_OS, INTRINSIC_GT_OS, INTRINSIC_GE_OS,
 187   INTRINSIC_LT_OS, INTRINSIC_LE_OS,
 188   INTRINSIC_NOT, INTRINSIC_USER, INTRINSIC_ASSIGN,
 189   INTRINSIC_PARENTHESES, GFC_INTRINSIC_END /* Sentinel */
 190 }
 191 gfc_intrinsic_op;
 192
 193
 194 /* This macro is the number of intrinsic operators that exist.
 195    Assumptions are made about the numbering of the interface_op enums.  */
 196 #define GFC_INTRINSIC_OPS GFC_INTRINSIC_END
 197
 198 /* Arithmetic results.  */
 199 typedef enum
 200 { ARITH_OK = 1, ARITH_OVERFLOW, ARITH_UNDERFLOW, ARITH_NAN,
 201   ARITH_DIV0, ARITH_INCOMMENSURATE, ARITH_ASYMMETRIC, ARITH_PROHIBIT
 202 }
 203 arith;
 204
 205 /* Statements.  */
 206 typedef enum
 207 {
 208   ST_ARITHMETIC_IF, ST_ALLOCATE, ST_ATTR_DECL, ST_ASSOCIATE,
 209   ST_BACKSPACE, ST_BLOCK, 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_ASSOCIATE, ST_END_BLOCK, ST_END_BLOCK_DATA,
 213   ST_ENDDO, ST_IMPLIED_ENDDO,
 214   ST_END_FILE, ST_FINAL, ST_FLUSH, ST_END_FORALL, ST_END_FUNCTION, ST_ENDIF,
 215   ST_END_INTERFACE, ST_END_MODULE, ST_END_PROGRAM, ST_END_SELECT,
 216   ST_END_SUBROUTINE, ST_END_WHERE, ST_END_TYPE, ST_ENTRY, ST_EQUIVALENCE,
 217   ST_ERROR_STOP, ST_EXIT, ST_FORALL, ST_FORALL_BLOCK, ST_FORMAT, ST_FUNCTION,
 218   ST_GOTO, ST_IF_BLOCK, ST_IMPLICIT, ST_IMPLICIT_NONE, ST_IMPORT,
 219   ST_INQUIRE, ST_INTERFACE, ST_SYNC_ALL, ST_SYNC_MEMORY, ST_SYNC_IMAGES,
 220   ST_PARAMETER, ST_MODULE, ST_MODULE_PROC, ST_NAMELIST, ST_NULLIFY, ST_OPEN,
 221   ST_PAUSE, ST_PRIVATE, ST_PROGRAM, ST_PUBLIC, ST_READ, ST_RETURN, ST_REWIND,
 222   ST_STOP, ST_SUBROUTINE, ST_TYPE, ST_USE, ST_WHERE_BLOCK, ST_WHERE, ST_WAIT,
 223   ST_WRITE, ST_ASSIGNMENT, ST_POINTER_ASSIGNMENT, ST_SELECT_CASE, ST_SEQUENCE,
 224   ST_SIMPLE_IF, ST_STATEMENT_FUNCTION, ST_DERIVED_DECL, ST_LABEL_ASSIGNMENT,
 225   ST_ENUM, ST_ENUMERATOR, ST_END_ENUM, ST_SELECT_TYPE, ST_TYPE_IS, ST_CLASS_IS,
 226   ST_OMP_ATOMIC, ST_OMP_BARRIER, ST_OMP_CRITICAL, ST_OMP_END_CRITICAL,
 227   ST_OMP_END_DO, ST_OMP_END_MASTER, ST_OMP_END_ORDERED, ST_OMP_END_PARALLEL,
 228   ST_OMP_END_PARALLEL_DO, ST_OMP_END_PARALLEL_SECTIONS,
 229   ST_OMP_END_PARALLEL_WORKSHARE, ST_OMP_END_SECTIONS, ST_OMP_END_SINGLE,
 230   ST_OMP_END_WORKSHARE, ST_OMP_DO, ST_OMP_FLUSH, ST_OMP_MASTER, ST_OMP_ORDERED,
 231   ST_OMP_PARALLEL, ST_OMP_PARALLEL_DO, ST_OMP_PARALLEL_SECTIONS,
 232   ST_OMP_PARALLEL_WORKSHARE, ST_OMP_SECTIONS, ST_OMP_SECTION, ST_OMP_SINGLE,
 233   ST_OMP_THREADPRIVATE, ST_OMP_WORKSHARE, ST_OMP_TASK, ST_OMP_END_TASK,
 234   ST_OMP_TASKWAIT, ST_PROCEDURE, ST_GENERIC, ST_CRITICAL, ST_END_CRITICAL,
 235   ST_GET_FCN_CHARACTERISTICS, ST_NONE
 236 }
 237 gfc_statement;
 238
 239
 240 /* Types of interfaces that we can have.  Assignment interfaces are
 241    considered to be intrinsic operators.  */
 242 typedef enum
 243 {
 244   INTERFACE_NAMELESS = 1, INTERFACE_GENERIC,
 245   INTERFACE_INTRINSIC_OP, INTERFACE_USER_OP, INTERFACE_ABSTRACT
 246 }
 247 interface_type;
 248
 249 /* Symbol flavors: these are all mutually exclusive.
 250    10 elements = 4 bits.  */
 251 typedef enum sym_flavor
 252 {
 253   FL_UNKNOWN = 0, FL_PROGRAM, FL_BLOCK_DATA, FL_MODULE, FL_VARIABLE,
 254   FL_PARAMETER, FL_LABEL, FL_PROCEDURE, FL_DERIVED, FL_NAMELIST,
 255   FL_VOID
 256 }
 257 sym_flavor;
 258
 259 /* Procedure types.  7 elements = 3 bits.  */
 260 typedef enum procedure_type
 261 { PROC_UNKNOWN, PROC_MODULE, PROC_INTERNAL, PROC_DUMMY,
 262   PROC_INTRINSIC, PROC_ST_FUNCTION, PROC_EXTERNAL
 263 }
 264 procedure_type;
 265
 266 /* Intent types.  */
 267 typedef enum sym_intent
 268 { INTENT_UNKNOWN = 0, INTENT_IN, INTENT_OUT, INTENT_INOUT
 269 }
 270 sym_intent;
 271
 272 /* Access types.  */
 273 typedef enum gfc_access
 274 { ACCESS_UNKNOWN = 0, ACCESS_PUBLIC, ACCESS_PRIVATE
 275 }
 276 gfc_access;
 277
 278 /* Flags to keep track of where an interface came from.
 279    3 elements = 2 bits.  */
 280 typedef enum ifsrc
 281 { IFSRC_UNKNOWN = 0,    /* Interface unknown, only return type may be known.  */
 282   IFSRC_DECL,           /* FUNCTION or SUBROUTINE declaration.  */
 283   IFSRC_IFBODY          /* INTERFACE statement or PROCEDURE statement
 284                            with explicit interface.  */
 285 }
 286 ifsrc;
 287
 288 /* Whether a SAVE attribute was set explicitly or implicitly.  */
 289 typedef enum save_state
 290 { SAVE_NONE = 0, SAVE_EXPLICIT, SAVE_IMPLICIT
 291 }
 292 save_state;
 293
 294 /* Strings for all symbol attributes.  We use these for dumping the
 295    parse tree, in error messages, and also when reading and writing
 296    modules.  In symbol.c.  */
 297 extern const mstring flavors[];
 298 extern const mstring procedures[];
 299 extern const mstring intents[];
 300 extern const mstring access_types[];
 301 extern const mstring ifsrc_types[];
 302 extern const mstring save_status[];
 303
 304 /* Enumeration of all the generic intrinsic functions.  Used by the
 305    backend for identification of a function.  */
 306
 307 enum gfc_isym_id
 308 {
 309   /* GFC_ISYM_NONE is used for intrinsics which will never be seen by
 310      the backend (e.g. KIND).  */
 311   GFC_ISYM_NONE = 0,
 312   GFC_ISYM_ABORT,
 313   GFC_ISYM_ABS,
 314   GFC_ISYM_ACCESS,
 315   GFC_ISYM_ACHAR,
 316   GFC_ISYM_ACOS,
 317   GFC_ISYM_ACOSH,
 318   GFC_ISYM_ADJUSTL,
 319   GFC_ISYM_ADJUSTR,
 320   GFC_ISYM_AIMAG,
 321   GFC_ISYM_AINT,
 322   GFC_ISYM_ALARM,
 323   GFC_ISYM_ALL,
 324   GFC_ISYM_ALLOCATED,
 325   GFC_ISYM_AND,
 326   GFC_ISYM_ANINT,
 327   GFC_ISYM_ANY,
 328   GFC_ISYM_ASIN,
 329   GFC_ISYM_ASINH,
 330   GFC_ISYM_ASSOCIATED,
 331   GFC_ISYM_ATAN,
 332   GFC_ISYM_ATAN2,
 333   GFC_ISYM_ATANH,
 334   GFC_ISYM_BIT_SIZE,
 335   GFC_ISYM_BTEST,
 336   GFC_ISYM_CEILING,
 337   GFC_ISYM_CHAR,
 338   GFC_ISYM_CHDIR,
 339   GFC_ISYM_CHMOD,
 340   GFC_ISYM_CMPLX,
 341   GFC_ISYM_COMMAND_ARGUMENT_COUNT,
 342   GFC_ISYM_COMPLEX,
 343   GFC_ISYM_CONJG,
 344   GFC_ISYM_CONVERSION,
 345   GFC_ISYM_COS,
 346   GFC_ISYM_COSH,
 347   GFC_ISYM_COUNT,
 348   GFC_ISYM_CPU_TIME,
 349   GFC_ISYM_CSHIFT,
 350   GFC_ISYM_CTIME,
 351   GFC_ISYM_C_SIZEOF,
 352   GFC_ISYM_DATE_AND_TIME,
 353   GFC_ISYM_DBLE,
 354   GFC_ISYM_DIGITS,
 355   GFC_ISYM_DIM,
 356   GFC_ISYM_DOT_PRODUCT,
 357   GFC_ISYM_DPROD,
 358   GFC_ISYM_DTIME,
 359   GFC_ISYM_EOSHIFT,
 360   GFC_ISYM_EPSILON,
 361   GFC_ISYM_ERF,
 362   GFC_ISYM_ERFC,
 363   GFC_ISYM_ERFC_SCALED,
 364   GFC_ISYM_ETIME,
 365   GFC_ISYM_EXIT,
 366   GFC_ISYM_EXP,
 367   GFC_ISYM_EXPONENT,
 368   GFC_ISYM_EXTENDS_TYPE_OF,
 369   GFC_ISYM_FDATE,
 370   GFC_ISYM_FGET,
 371   GFC_ISYM_FGETC,
 372   GFC_ISYM_FLOOR,
 373   GFC_ISYM_FLUSH,
 374   GFC_ISYM_FNUM,
 375   GFC_ISYM_FPUT,
 376   GFC_ISYM_FPUTC,
 377   GFC_ISYM_FRACTION,
 378   GFC_ISYM_FREE,
 379   GFC_ISYM_FSEEK,
 380   GFC_ISYM_FSTAT,
 381   GFC_ISYM_FTELL,
 382   GFC_ISYM_TGAMMA,
 383   GFC_ISYM_GERROR,
 384   GFC_ISYM_GETARG,
 385   GFC_ISYM_GET_COMMAND,
 386   GFC_ISYM_GET_COMMAND_ARGUMENT,
 387   GFC_ISYM_GETCWD,
 388   GFC_ISYM_GETENV,
 389   GFC_ISYM_GET_ENVIRONMENT_VARIABLE,
 390   GFC_ISYM_GETGID,
 391   GFC_ISYM_GETLOG,
 392   GFC_ISYM_GETPID,
 393   GFC_ISYM_GETUID,
 394   GFC_ISYM_GMTIME,
 395   GFC_ISYM_HOSTNM,
 396   GFC_ISYM_HUGE,
 397   GFC_ISYM_HYPOT,
 398   GFC_ISYM_IACHAR,
 399   GFC_ISYM_IAND,
 400   GFC_ISYM_IARGC,
 401   GFC_ISYM_IBCLR,
 402   GFC_ISYM_IBITS,
 403   GFC_ISYM_IBSET,
 404   GFC_ISYM_ICHAR,
 405   GFC_ISYM_IDATE,
 406   GFC_ISYM_IEOR,
 407   GFC_ISYM_IERRNO,
 408   GFC_ISYM_IMAGE_INDEX,
 409   GFC_ISYM_INDEX,
 410   GFC_ISYM_INT,
 411   GFC_ISYM_INT2,
 412   GFC_ISYM_INT8,
 413   GFC_ISYM_IOR,
 414   GFC_ISYM_IRAND,
 415   GFC_ISYM_ISATTY,
 416   GFC_ISYM_IS_IOSTAT_END,
 417   GFC_ISYM_IS_IOSTAT_EOR,
 418   GFC_ISYM_ISNAN,
 419   GFC_ISYM_ISHFT,
 420   GFC_ISYM_ISHFTC,
 421   GFC_ISYM_ITIME,
 422   GFC_ISYM_J0,
 423   GFC_ISYM_J1,
 424   GFC_ISYM_JN,
 425   GFC_ISYM_KILL,
 426   GFC_ISYM_KIND,
 427   GFC_ISYM_LBOUND,
 428   GFC_ISYM_LCOBOUND,
 429   GFC_ISYM_LEADZ,
 430   GFC_ISYM_LEN,
 431   GFC_ISYM_LEN_TRIM,
 432   GFC_ISYM_LGAMMA,
 433   GFC_ISYM_LGE,
 434   GFC_ISYM_LGT,
 435   GFC_ISYM_LINK,
 436   GFC_ISYM_LLE,
 437   GFC_ISYM_LLT,
 438   GFC_ISYM_LOC,
 439   GFC_ISYM_LOG,
 440   GFC_ISYM_LOG10,
 441   GFC_ISYM_LOGICAL,
 442   GFC_ISYM_LONG,
 443   GFC_ISYM_LSHIFT,
 444   GFC_ISYM_LSTAT,
 445   GFC_ISYM_LTIME,
 446   GFC_ISYM_MALLOC,
 447   GFC_ISYM_MATMUL,
 448   GFC_ISYM_MAX,
 449   GFC_ISYM_MAXEXPONENT,
 450   GFC_ISYM_MAXLOC,
 451   GFC_ISYM_MAXVAL,
 452   GFC_ISYM_MCLOCK,
 453   GFC_ISYM_MCLOCK8,
 454   GFC_ISYM_MERGE,
 455   GFC_ISYM_MIN,
 456   GFC_ISYM_MINEXPONENT,
 457   GFC_ISYM_MINLOC,
 458   GFC_ISYM_MINVAL,
 459   GFC_ISYM_MOD,
 460   GFC_ISYM_MODULO,
 461   GFC_ISYM_MOVE_ALLOC,
 462   GFC_ISYM_MVBITS,
 463   GFC_ISYM_NEAREST,
 464   GFC_ISYM_NEW_LINE,
 465   GFC_ISYM_NINT,
 466   GFC_ISYM_NOT,
 467   GFC_ISYM_NULL,
 468   GFC_ISYM_NUMIMAGES,
 469   GFC_ISYM_OR,
 470   GFC_ISYM_PACK,
 471   GFC_ISYM_PERROR,
 472   GFC_ISYM_PRECISION,
 473   GFC_ISYM_PRESENT,
 474   GFC_ISYM_PRODUCT,
 475   GFC_ISYM_RADIX,
 476   GFC_ISYM_RAND,
 477   GFC_ISYM_RANDOM_NUMBER,
 478   GFC_ISYM_RANDOM_SEED,
 479   GFC_ISYM_RANGE,
 480   GFC_ISYM_REAL,
 481   GFC_ISYM_RENAME,
 482   GFC_ISYM_REPEAT,
 483   GFC_ISYM_RESHAPE,
 484   GFC_ISYM_RRSPACING,
 485   GFC_ISYM_RSHIFT,
 486   GFC_ISYM_SAME_TYPE_AS,
 487   GFC_ISYM_SC_KIND,
 488   GFC_ISYM_SCALE,
 489   GFC_ISYM_SCAN,
 490   GFC_ISYM_SECNDS,
 491   GFC_ISYM_SECOND,
 492   GFC_ISYM_SET_EXPONENT,
 493   GFC_ISYM_SHAPE,
 494   GFC_ISYM_SIGN,
 495   GFC_ISYM_SIGNAL,
 496   GFC_ISYM_SI_KIND,
 497   GFC_ISYM_SIN,
 498   GFC_ISYM_SINH,
 499   GFC_ISYM_SIZE,
 500   GFC_ISYM_SLEEP,
 501   GFC_ISYM_SIZEOF,
 502   GFC_ISYM_SPACING,
 503   GFC_ISYM_SPREAD,
 504   GFC_ISYM_SQRT,
 505   GFC_ISYM_SRAND,
 506   GFC_ISYM_SR_KIND,
 507   GFC_ISYM_STAT,
 508   GFC_ISYM_STORAGE_SIZE,
 509   GFC_ISYM_SUM,
 510   GFC_ISYM_SYMLINK,
 511   GFC_ISYM_SYMLNK,
 512   GFC_ISYM_SYSTEM,
 513   GFC_ISYM_SYSTEM_CLOCK,
 514   GFC_ISYM_TAN,
 515   GFC_ISYM_TANH,
 516   GFC_ISYM_THIS_IMAGE,
 517   GFC_ISYM_TIME,
 518   GFC_ISYM_TIME8,
 519   GFC_ISYM_TINY,
 520   GFC_ISYM_TRAILZ,
 521   GFC_ISYM_TRANSFER,
 522   GFC_ISYM_TRANSPOSE,
 523   GFC_ISYM_TRIM,
 524   GFC_ISYM_TTYNAM,
 525   GFC_ISYM_UBOUND,
 526   GFC_ISYM_UCOBOUND,
 527   GFC_ISYM_UMASK,
 528   GFC_ISYM_UNLINK,
 529   GFC_ISYM_UNPACK,
 530   GFC_ISYM_VERIFY,
 531   GFC_ISYM_XOR,
 532   GFC_ISYM_Y0,
 533   GFC_ISYM_Y1,
 534   GFC_ISYM_YN
 535 };
 536 typedef enum gfc_isym_id gfc_isym_id;
 537
 538
 539 typedef enum
 540 {
 541   GFC_INIT_REAL_OFF = 0,
 542   GFC_INIT_REAL_ZERO,
 543   GFC_INIT_REAL_NAN,
 544   GFC_INIT_REAL_SNAN,
 545   GFC_INIT_REAL_INF,
 546   GFC_INIT_REAL_NEG_INF
 547 }
 548 init_local_real;
 549
 550 typedef enum
 551 {
 552   GFC_INIT_LOGICAL_OFF = 0,
 553   GFC_INIT_LOGICAL_FALSE,
 554   GFC_INIT_LOGICAL_TRUE
 555 }
 556 init_local_logical;
 557
 558 typedef enum
 559 {
 560   GFC_INIT_CHARACTER_OFF = 0,
 561   GFC_INIT_CHARACTER_ON
 562 }
 563 init_local_character;
 564
 565 typedef enum
 566 {
 567   GFC_INIT_INTEGER_OFF = 0,
 568   GFC_INIT_INTEGER_ON
 569 }
 570 init_local_integer;
 571
 572 typedef enum
 573 {
 574   GFC_FCOARRAY_NONE = 0,
 575   GFC_FCOARRAY_SINGLE
 576 }
 577 gfc_fcoarray;
 578
 579 /************************* Structures *****************************/
 580
 581 /* Used for keeping things in balanced binary trees.  */
 582 #define BBT_HEADER(self) int priority; struct self *left, *right
 583
 584 #define NAMED_INTCST(a,b,c,d) a,
 585 typedef enum
 586 {
 587   ISOFORTRANENV_INVALID = -1,
 588 #include "iso-fortran-env.def"
 589   ISOFORTRANENV_LAST, ISOFORTRANENV_NUMBER = ISOFORTRANENV_LAST
 590 }
 591 iso_fortran_env_symbol;
 592 #undef NAMED_INTCST
 593
 594 #define NAMED_INTCST(a,b,c,d) a,
 595 #define NAMED_REALCST(a,b,c) a,
 596 #define NAMED_CMPXCST(a,b,c) a,
 597 #define NAMED_LOGCST(a,b,c) a,
 598 #define NAMED_CHARKNDCST(a,b,c) a,
 599 #define NAMED_CHARCST(a,b,c) a,
 600 #define DERIVED_TYPE(a,b,c) a,
 601 #define PROCEDURE(a,b) a,
 602 typedef enum
 603 {
 604   ISOCBINDING_INVALID = -1,
 605 #include "iso-c-binding.def"
 606   ISOCBINDING_LAST,
 607   ISOCBINDING_NUMBER = ISOCBINDING_LAST
 608 }
 609 iso_c_binding_symbol;
 610 #undef NAMED_INTCST
 611 #undef NAMED_REALCST
 612 #undef NAMED_CMPXCST
 613 #undef NAMED_LOGCST
 614 #undef NAMED_CHARKNDCST
 615 #undef NAMED_CHARCST
 616 #undef DERIVED_TYPE
 617 #undef PROCEDURE
 618
 619 typedef enum
 620 {
 621   INTMOD_NONE = 0, INTMOD_ISO_FORTRAN_ENV, INTMOD_ISO_C_BINDING
 622 }
 623 intmod_id;
 624
 625 typedef struct
 626 {
 627   char name[GFC_MAX_SYMBOL_LEN + 1];
 628   int value;  /* Used for both integer and character values.  */
 629   bt f90_type;
 630 }
 631 CInteropKind_t;
 632
 633 /* Array of structs, where the structs represent the C interop kinds.
 634    The list will be implemented based on a hash of the kind name since
 635    these could be accessed multiple times.
 636    Declared in trans-types.c as a global, since it's in that file
 637    that the list is initialized.  */
 638 extern CInteropKind_t c_interop_kinds_table[];
 639
 640
 641 /* Structure and list of supported extension attributes.  */
 642 typedef enum
 643 {
 644   EXT_ATTR_DLLIMPORT = 0,
 645   EXT_ATTR_DLLEXPORT,
 646   EXT_ATTR_STDCALL,
 647   EXT_ATTR_CDECL,
 648   EXT_ATTR_FASTCALL,
 649   EXT_ATTR_LAST, EXT_ATTR_NUM = EXT_ATTR_LAST
 650 }
 651 ext_attr_id_t;
 652
 653 typedef struct
 654 {
 655   const char *name;
 656   unsigned id;
 657   const char *middle_end_name;
 658 }
 659 ext_attr_t;
 660
 661 extern const ext_attr_t ext_attr_list[];
 662
 663 /* Symbol attribute structure.  */
 664 typedef struct
 665 {
 666   /* Variable attributes.  */
 667   unsigned allocatable:1, dimension:1, codimension:1, external:1, intrinsic:1,
 668     optional:1, pointer:1, target:1, value:1, volatile_:1, temporary:1,
 669     dummy:1, result:1, assign:1, threadprivate:1, not_always_present:1,
 670     implied_index:1, subref_array_pointer:1, proc_pointer:1, asynchronous:1,
 671     contiguous:1;
 672
 673   /* For CLASS containers, the pointer attribute is sometimes set internally
 674      even though it was not directly specified.  In this case, keep the
 675      "real" (original) value here.  */
 676   unsigned class_pointer:1;
 677
 678   ENUM_BITFIELD (save_state) save:2;
 679
 680   unsigned data:1,              /* Symbol is named in a DATA statement.  */
 681     is_protected:1,             /* Symbol has been marked as protected.  */
 682     use_assoc:1,                /* Symbol has been use-associated.  */
 683     use_only:1,                 /* Symbol has been use-associated, with ONLY.  */
 684     use_rename:1,               /* Symbol has been use-associated and renamed.  */
 685     imported:1,                 /* Symbol has been associated by IMPORT.  */
 686     host_assoc:1;               /* Symbol has been host associated.  */
 687
 688   unsigned in_namelist:1, in_common:1, in_equivalence:1;
 689   unsigned function:1, subroutine:1, procedure:1;
 690   unsigned generic:1, generic_copy:1;
 691   unsigned implicit_type:1;     /* Type defined via implicit rules.  */
 692   unsigned untyped:1;           /* No implicit type could be found.  */
 693
 694   unsigned is_bind_c:1;         /* say if is bound to C.  */
 695   unsigned extension:8;         /* extension level of a derived type.  */
 696   unsigned is_class:1;          /* is a CLASS container.  */
 697   unsigned class_ok:1;          /* is a CLASS object with correct attributes.  */
 698   unsigned vtab:1;              /* is a derived type vtab, pointed to by CLASS objects.  */
 699   unsigned vtype:1;             /* is a derived type of a vtab.  */
 700
 701   /* These flags are both in the typespec and attribute.  The attribute
 702      list is what gets read from/written to a module file.  The typespec
 703      is created from a decl being processed.  */
 704   unsigned is_c_interop:1;      /* It's c interoperable.  */
 705   unsigned is_iso_c:1;          /* Symbol is from iso_c_binding.  */
 706
 707   /* Function/subroutine attributes */
 708   unsigned sequence:1, elemental:1, pure:1, recursive:1;
 709   unsigned unmaskable:1, masked:1, contained:1, mod_proc:1, abstract:1;
 710
 711   /* This is set if the subroutine doesn't return.  Currently, this
 712      is only possible for intrinsic subroutines.  */
 713   unsigned noreturn:1;
 714
 715   /* Set if this procedure is an alternate entry point.  These procedures
 716      don't have any code associated, and the backend will turn them into
 717      thunks to the master function.  */
 718   unsigned entry:1;
 719
 720   /* Set if this is the master function for a procedure with multiple
 721      entry points.  */
 722   unsigned entry_master:1;
 723
 724   /* Set if this is the master function for a function with multiple
 725      entry points where characteristics of the entry points differ.  */
 726   unsigned mixed_entry_master:1;
 727
 728   /* Set if a function must always be referenced by an explicit interface.  */
 729   unsigned always_explicit:1;
 730
 731   /* Set if the symbol has been referenced in an expression.  No further
 732      modification of type or type parameters is permitted.  */
 733   unsigned referenced:1;
 734
 735   /* Set if this is the symbol for the main program.  */
 736   unsigned is_main_program:1;
 737
 738   /* Mutually exclusive multibit attributes.  */
 739   ENUM_BITFIELD (gfc_access) access:2;
 740   ENUM_BITFIELD (sym_intent) intent:2;
 741   ENUM_BITFIELD (sym_flavor) flavor:4;
 742   ENUM_BITFIELD (ifsrc) if_source:2;
 743
 744   ENUM_BITFIELD (procedure_type) proc:3;
 745
 746   /* Special attributes for Cray pointers, pointees.  */
 747   unsigned cray_pointer:1, cray_pointee:1;
 748
 749   /* The symbol is a derived type with allocatable components, pointer
 750      components or private components, procedure pointer components,
 751      possibly nested.  zero_comp is true if the derived type has no
 752      component at all.  */
 753   unsigned alloc_comp:1, pointer_comp:1, proc_pointer_comp:1,
 754            private_comp:1, zero_comp:1, coarray_comp:1;
 755
 756   /* Attributes set by compiler extensions (!GCC$ ATTRIBUTES).  */
 757   unsigned ext_attr:EXT_ATTR_NUM;
 758
 759   /* The namespace where the attribute has been set.  */
 760   struct gfc_namespace *volatile_ns, *asynchronous_ns;
 761 }
 762 symbol_attribute;
 763
 764
 765 /* We need to store source lines as sequences of multibyte source
 766    characters. We define here a type wide enough to hold any multibyte
 767    source character, just like libcpp does.  A 32-bit type is enough.  */
 768
 769 #if HOST_BITS_PER_INT >= 32
 770 typedef unsigned int gfc_char_t;
 771 #elif HOST_BITS_PER_LONG >= 32
 772 typedef unsigned long gfc_char_t;
 773 #elif defined(HAVE_LONG_LONG) && (HOST_BITS_PER_LONGLONG >= 32)
 774 typedef unsigned long long gfc_char_t;
 775 #else
 776 # error "Cannot find an integer type with at least 32 bits"
 777 #endif
 778
 779
 780 /* The following three structures are used to identify a location in
 781    the sources.
 782
 783    gfc_file is used to maintain a tree of the source files and how
 784    they include each other
 785
 786    gfc_linebuf holds a single line of source code and information
 787    which file it resides in
 788
 789    locus point to the sourceline and the character in the source
 790    line.
 791 */
 792
 793 typedef struct gfc_file
 794 {
 795   struct gfc_file *next, *up;
 796   int inclusion_line, line;
 797   char *filename;
 798 } gfc_file;
 799
 800 typedef struct gfc_linebuf
 801 {
 802   source_location location;
 803   struct gfc_file *file;
 804   struct gfc_linebuf *next;
 805
 806   int truncated;
 807   bool dbg_emitted;
 808
 809   gfc_char_t line[1];
 810 } gfc_linebuf;
 811
 812 #define gfc_linebuf_header_size (offsetof (gfc_linebuf, line))
 813
 814 #define gfc_linebuf_linenum(LBUF) (LOCATION_LINE ((LBUF)->location))
 815
 816 typedef struct
 817 {
 818   gfc_char_t *nextc;
 819   gfc_linebuf *lb;
 820 } locus;
 821
 822 /* In order for the "gfc" format checking to work correctly, you must
 823    have declared a typedef locus first.  */
 824 #if GCC_VERSION >= 4001
 825 #define ATTRIBUTE_GCC_GFC(m, n) __attribute__ ((__format__ (__gcc_gfc__, m, n))) ATTRIBUTE_NONNULL(m)
 826 #else
 827 #define ATTRIBUTE_GCC_GFC(m, n) ATTRIBUTE_NONNULL(m)
 828 #endif
 829
 830
 831 /* Suppress error messages or re-enable them.  */
 832
 833 void gfc_push_suppress_errors (void);
 834 void gfc_pop_suppress_errors (void);
 835
 836
 837 /* Character length structures hold the expression that gives the
 838    length of a character variable.  We avoid putting these into
 839    gfc_typespec because doing so prevents us from doing structure
 840    copies and forces us to deallocate any typespecs we create, as well
 841    as structures that contain typespecs.  They also can have multiple
 842    character typespecs pointing to them.
 843
 844    These structures form a singly linked list within the current
 845    namespace and are deallocated with the namespace.  It is possible to
 846    end up with gfc_charlen structures that have nothing pointing to them.  */
 847
 848 typedef struct gfc_charlen
 849 {
 850   struct gfc_expr *length;
 851   struct gfc_charlen *next;
 852   bool length_from_typespec; /* Length from explicit array ctor typespec?  */
 853   tree backend_decl;
 854   tree passed_length; /* Length argument explicitelly passed.  */
 855
 856   int resolved;
 857 }
 858 gfc_charlen;
 859
 860 #define gfc_get_charlen() XCNEW (gfc_charlen)
 861
 862 /* Type specification structure.  */
 863 typedef struct
 864 {
 865   bt type;
 866   int kind;
 867
 868   union
 869   {
 870     struct gfc_symbol *derived; /* For derived types only.  */
 871     gfc_charlen *cl;            /* For character types only.  */
 872   }
 873   u;
 874
 875   struct gfc_symbol *interface; /* For PROCEDURE declarations.  */
 876   int is_c_interop;
 877   int is_iso_c;
 878   bt f90_type;
 879 }
 880 gfc_typespec;
 881
 882 /* Array specification.  */
 883 typedef struct
 884 {
 885   int rank;     /* A rank of zero means that a variable is a scalar.  */
 886   int corank;
 887   array_type type, cotype;
 888   struct gfc_expr *lower[GFC_MAX_DIMENSIONS], *upper[GFC_MAX_DIMENSIONS];
 889
 890   /* These two fields are used with the Cray Pointer extension.  */
 891   bool cray_pointee; /* True iff this spec belongs to a cray pointee.  */
 892   bool cp_was_assumed; /* AS_ASSUMED_SIZE cp arrays are converted to
 893                         AS_EXPLICIT, but we want to remember that we
 894                         did this.  */
 895
 896 }
 897 gfc_array_spec;
 898
 899 #define gfc_get_array_spec() XCNEW (gfc_array_spec)
 900
 901
 902 /* Components of derived types.  */
 903 typedef struct gfc_component
 904 {
 905   const char *name;
 906   gfc_typespec ts;
 907
 908   symbol_attribute attr;
 909   gfc_array_spec *as;
 910
 911   tree backend_decl;
 912   locus loc;
 913   struct gfc_expr *initializer;
 914   struct gfc_component *next;
 915
 916   /* Needed for procedure pointer components.  */
 917   struct gfc_formal_arglist *formal;
 918   struct gfc_namespace *formal_ns;
 919   struct gfc_typebound_proc *tb;
 920 }
 921 gfc_component;
 922
 923 #define gfc_get_component() XCNEW (gfc_component)
 924
 925 /* Formal argument lists are lists of symbols.  */
 926 typedef struct gfc_formal_arglist
 927 {
 928   /* Symbol representing the argument at this position in the arglist.  */
 929   struct gfc_symbol *sym;
 930   /* Points to the next formal argument.  */
 931   struct gfc_formal_arglist *next;
 932 }
 933 gfc_formal_arglist;
 934
 935 #define gfc_get_formal_arglist() XCNEW (gfc_formal_arglist)
 936
 937
 938 /* The gfc_actual_arglist structure is for actual arguments.  */
 939 typedef struct gfc_actual_arglist
 940 {
 941   const char *name;
 942   /* Alternate return label when the expr member is null.  */
 943   struct gfc_st_label *label;
 944
 945   /* This is set to the type of an eventual omitted optional
 946      argument. This is used to determine if a hidden string length
 947      argument has to be added to a function call.  */
 948   bt missing_arg_type;
 949
 950   struct gfc_expr *expr;
 951   struct gfc_actual_arglist *next;
 952 }
 953 gfc_actual_arglist;
 954
 955 #define gfc_get_actual_arglist() XCNEW (gfc_actual_arglist)
 956
 957
 958 /* Because a symbol can belong to multiple namelists, they must be
 959    linked externally to the symbol itself.  */
 960 typedef struct gfc_namelist
 961 {
 962   struct gfc_symbol *sym;
 963   struct gfc_namelist *next;
 964 }
 965 gfc_namelist;
 966
 967 #define gfc_get_namelist() XCNEW (gfc_namelist)
 968
 969 enum
 970 {
 971   OMP_LIST_PRIVATE,
 972   OMP_LIST_FIRSTPRIVATE,
 973   OMP_LIST_LASTPRIVATE,
 974   OMP_LIST_COPYPRIVATE,
 975   OMP_LIST_SHARED,
 976   OMP_LIST_COPYIN,
 977   OMP_LIST_PLUS,
 978   OMP_LIST_REDUCTION_FIRST = OMP_LIST_PLUS,
 979   OMP_LIST_MULT,
 980   OMP_LIST_SUB,
 981   OMP_LIST_AND,
 982   OMP_LIST_OR,
 983   OMP_LIST_EQV,
 984   OMP_LIST_NEQV,
 985   OMP_LIST_MAX,
 986   OMP_LIST_MIN,
 987   OMP_LIST_IAND,
 988   OMP_LIST_IOR,
 989   OMP_LIST_IEOR,
 990   OMP_LIST_REDUCTION_LAST = OMP_LIST_IEOR,
 991   OMP_LIST_NUM
 992 };
 993
 994 /* Because a symbol can belong to multiple namelists, they must be
 995    linked externally to the symbol itself.  */
 996
 997 enum gfc_omp_sched_kind
 998 {
 999   OMP_SCHED_NONE,
1000   OMP_SCHED_STATIC,
1001   OMP_SCHED_DYNAMIC,
1002   OMP_SCHED_GUIDED,
1003   OMP_SCHED_RUNTIME,
1004   OMP_SCHED_AUTO
1005 };
1006
1007 enum gfc_omp_default_sharing
1008 {
1009   OMP_DEFAULT_UNKNOWN,
1010   OMP_DEFAULT_NONE,
1011   OMP_DEFAULT_PRIVATE,
1012   OMP_DEFAULT_SHARED,
1013   OMP_DEFAULT_FIRSTPRIVATE
1014 };
1015
1016 typedef struct gfc_omp_clauses
1017 {
1018   struct gfc_expr *if_expr;
1019   struct gfc_expr *num_threads;
1020   gfc_namelist *lists[OMP_LIST_NUM];
1021   enum gfc_omp_sched_kind sched_kind;
1022   struct gfc_expr *chunk_size;
1023   enum gfc_omp_default_sharing default_sharing;
1024   int collapse;
1025   bool nowait, ordered, untied;
1026 }
1027 gfc_omp_clauses;
1028
1029 #define gfc_get_omp_clauses() XCNEW (gfc_omp_clauses)
1030
1031
1032 /* The gfc_st_label structure is a BBT attached to a namespace that
1033    records the usage of statement labels within that space.  */
1034
1035 typedef struct gfc_st_label
1036 {
1037   BBT_HEADER(gfc_st_label);
1038
1039   int value;
1040
1041   gfc_sl_type defined, referenced;
1042
1043   struct gfc_expr *format;
1044
1045   tree backend_decl;
1046
1047   locus where;
1048 }
1049 gfc_st_label;
1050
1051
1052 /* gfc_interface()-- Interfaces are lists of symbols strung together.  */
1053 typedef struct gfc_interface
1054 {
1055   struct gfc_symbol *sym;
1056   locus where;
1057   struct gfc_interface *next;
1058 }
1059 gfc_interface;
1060
1061 #define gfc_get_interface() XCNEW (gfc_interface)
1062
1063 /* User operator nodes.  These are like stripped down symbols.  */
1064 typedef struct
1065 {
1066   const char *name;
1067
1068   gfc_interface *op;
1069   struct gfc_namespace *ns;
1070   gfc_access access;
1071 }
1072 gfc_user_op;
1073
1074
1075 /* A list of specific bindings that are associated with a generic spec.  */
1076 typedef struct gfc_tbp_generic
1077 {
1078   /* The parser sets specific_st, upon resolution we look for the corresponding
1079      gfc_typebound_proc and set specific for further use.  */
1080   struct gfc_symtree* specific_st;
1081   struct gfc_typebound_proc* specific;
1082
1083   struct gfc_tbp_generic* next;
1084 }
1085 gfc_tbp_generic;
1086
1087 #define gfc_get_tbp_generic() XCNEW (gfc_tbp_generic)
1088
1089
1090 /* Data needed for type-bound procedures.  */
1091 typedef struct gfc_typebound_proc
1092 {
1093   locus where; /* Where the PROCEDURE/GENERIC definition was.  */
1094
1095   union
1096   {
1097     struct gfc_symtree* specific; /* The interface if DEFERRED.  */
1098     gfc_tbp_generic* generic;
1099   }
1100   u;
1101
1102   gfc_access access;
1103   const char* pass_arg; /* Argument-name for PASS.  NULL if not specified.  */
1104
1105   /* The overridden type-bound proc (or GENERIC with this name in the
1106      parent-type) or NULL if non.  */
1107   struct gfc_typebound_proc* overridden;
1108
1109   /* Once resolved, we use the position of pass_arg in the formal arglist of
1110      the binding-target procedure to identify it.  The first argument has
1111      number 1 here, the second 2, and so on.  */
1112   unsigned pass_arg_num;
1113
1114   unsigned nopass:1; /* Whether we have NOPASS (PASS otherwise).  */
1115   unsigned non_overridable:1;
1116   unsigned deferred:1;
1117   unsigned is_generic:1;
1118   unsigned function:1, subroutine:1;
1119   unsigned error:1; /* Ignore it, when an error occurred during resolution.  */
1120   unsigned ppc:1;
1121 }
1122 gfc_typebound_proc;
1123
1124
1125 /* Symbol nodes.  These are important things.  They are what the
1126    standard refers to as "entities".  The possibly multiple names that
1127    refer to the same entity are accomplished by a binary tree of
1128    symtree structures that is balanced by the red-black method-- more
1129    than one symtree node can point to any given symbol.  */
1130
1131 typedef struct gfc_symbol
1132 {
1133   const char *name;     /* Primary name, before renaming */
1134   const char *module;   /* Module this symbol came from */
1135   locus declared_at;
1136
1137   gfc_typespec ts;
1138   symbol_attribute attr;
1139
1140   /* The formal member points to the formal argument list if the
1141      symbol is a function or subroutine name.  If the symbol is a
1142      generic name, the generic member points to the list of
1143      interfaces.  */
1144
1145   gfc_interface *generic;
1146   gfc_access component_access;
1147
1148   gfc_formal_arglist *formal;
1149   struct gfc_namespace *formal_ns;
1150   struct gfc_namespace *f2k_derived;
1151
1152   struct gfc_expr *value;       /* Parameter/Initializer value */
1153   gfc_array_spec *as;
1154   struct gfc_symbol *result;    /* function result symbol */
1155   gfc_component *components;    /* Derived type components */
1156
1157   /* Defined only for Cray pointees; points to their pointer.  */
1158   struct gfc_symbol *cp_pointer;
1159
1160   int entry_id;                 /* Used in resolve.c for entries.  */
1161
1162   /* CLASS hashed name for declared and dynamic types in the class.  */
1163   int hash_value;
1164
1165   struct gfc_symbol *common_next;       /* Links for COMMON syms */
1166
1167   /* This is in fact a gfc_common_head but it is only used for pointer
1168      comparisons to check if symbols are in the same common block.  */
1169   struct gfc_common_head* common_head;
1170
1171   /* Make sure setup code for dummy arguments is generated in the correct
1172      order.  */
1173   int dummy_order;
1174
1175   gfc_namelist *namelist, *namelist_tail;
1176
1177   /* Change management fields.  Symbols that might be modified by the
1178      current statement have the mark member nonzero and are kept in a
1179      singly linked list through the tlink field.  Of these symbols,
1180      symbols with old_symbol equal to NULL are symbols created within
1181      the current statement.  Otherwise, old_symbol points to a copy of
1182      the old symbol.  */
1183
1184   struct gfc_symbol *old_symbol, *tlink;
1185   unsigned mark:1, gfc_new:1;
1186   /* Nonzero if all equivalences associated with this symbol have been
1187      processed.  */
1188   unsigned equiv_built:1;
1189   /* Set if this variable is used as an index name in a FORALL.  */
1190   unsigned forall_index:1;
1191   int refs;
1192   struct gfc_namespace *ns;     /* namespace containing this symbol */
1193
1194   tree backend_decl;
1195
1196   /* Identity of the intrinsic module the symbol comes from, or
1197      INTMOD_NONE if it's not imported from a intrinsic module.  */
1198   intmod_id from_intmod;
1199   /* Identity of the symbol from intrinsic modules, from enums maintained
1200      separately by each intrinsic module.  Used together with from_intmod,
1201      it uniquely identifies a symbol from an intrinsic module.  */
1202   int intmod_sym_id;
1203
1204   /* This may be repetitive, since the typespec now has a binding
1205      label field.  */
1206   char binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
1207   /* Store a reference to the common_block, if this symbol is in one.  */
1208   struct gfc_common_head *common_block;
1209
1210   /* Link to corresponding association-list if this is an associate name.  */
1211   struct gfc_association_list *assoc;
1212 }
1213 gfc_symbol;
1214
1215
1216 /* This structure is used to keep track of symbols in common blocks.  */
1217 typedef struct gfc_common_head
1218 {
1219   locus where;
1220   char use_assoc, saved, threadprivate;
1221   char name[GFC_MAX_SYMBOL_LEN + 1];
1222   struct gfc_symbol *head;
1223   char binding_label[GFC_MAX_BINDING_LABEL_LEN + 1];
1224   int is_bind_c;
1225 }
1226 gfc_common_head;
1227
1228 #define gfc_get_common_head() XCNEW (gfc_common_head)
1229
1230
1231 /* A list of all the alternate entry points for a procedure.  */
1232
1233 typedef struct gfc_entry_list
1234 {
1235   /* The symbol for this entry point.  */
1236   gfc_symbol *sym;
1237   /* The zero-based id of this entry point.  */
1238   int id;
1239   /* The LABEL_EXPR marking this entry point.  */
1240   tree label;
1241   /* The next item in the list.  */
1242   struct gfc_entry_list *next;
1243 }
1244 gfc_entry_list;
1245
1246 #define gfc_get_entry_list() \
1247   (gfc_entry_list *) gfc_getmem(sizeof(gfc_entry_list))
1248
1249 /* Lists of rename info for the USE statement.  */
1250
1251 typedef struct gfc_use_rename
1252 {
1253   char local_name[GFC_MAX_SYMBOL_LEN + 1], use_name[GFC_MAX_SYMBOL_LEN + 1];
1254   struct gfc_use_rename *next;
1255   int found;
1256   gfc_intrinsic_op op;
1257   locus where;
1258 }
1259 gfc_use_rename;
1260
1261 #define gfc_get_use_rename() XCNEW (gfc_use_rename);
1262
1263 /* A list of all USE statements in a namespace.  */
1264
1265 typedef struct gfc_use_list
1266 {
1267   const char *module_name;
1268   int only_flag;
1269   struct gfc_use_rename *rename;
1270   locus where;
1271   /* Next USE statement.  */
1272   struct gfc_use_list *next;
1273 }
1274 gfc_use_list;
1275
1276 #define gfc_get_use_list() \
1277   (gfc_use_list *) gfc_getmem(sizeof(gfc_use_list))
1278
1279 /* Within a namespace, symbols are pointed to by symtree nodes that
1280    are linked together in a balanced binary tree.  There can be
1281    several symtrees pointing to the same symbol node via USE
1282    statements.  */
1283
1284 typedef struct gfc_symtree
1285 {
1286   BBT_HEADER (gfc_symtree);
1287   const char *name;
1288   int ambiguous;
1289   union
1290   {
1291     gfc_symbol *sym;            /* Symbol associated with this node */
1292     gfc_user_op *uop;
1293     gfc_common_head *common;
1294     gfc_typebound_proc *tb;
1295   }
1296   n;
1297 }
1298 gfc_symtree;
1299
1300 /* A linked list of derived types in the namespace.  */
1301 typedef struct gfc_dt_list
1302 {
1303   struct gfc_symbol *derived;
1304   struct gfc_dt_list *next;
1305 }
1306 gfc_dt_list;
1307
1308 #define gfc_get_dt_list() XCNEW (gfc_dt_list)
1309
1310   /* A list of all derived types.  */
1311   extern gfc_dt_list *gfc_derived_types;
1312
1313 /* A namespace describes the contents of procedure, module, interface block
1314    or BLOCK construct.  */
1315 /* ??? Anything else use these?  */
1316
1317 typedef struct gfc_namespace
1318 {
1319   /* Tree containing all the symbols in this namespace.  */
1320   gfc_symtree *sym_root;
1321   /* Tree containing all the user-defined operators in the namespace.  */
1322   gfc_symtree *uop_root;
1323   /* Tree containing all the common blocks.  */
1324   gfc_symtree *common_root;
1325
1326   /* Tree containing type-bound procedures.  */
1327   gfc_symtree *tb_sym_root;
1328   /* Type-bound user operators.  */
1329   gfc_symtree *tb_uop_root;
1330   /* For derived-types, store type-bound intrinsic operators here.  */
1331   gfc_typebound_proc *tb_op[GFC_INTRINSIC_OPS];
1332   /* Linked list of finalizer procedures.  */
1333   struct gfc_finalizer *finalizers;
1334
1335   /* If set_flag[letter] is set, an implicit type has been set for letter.  */
1336   int set_flag[GFC_LETTERS];
1337   /* Keeps track of the implicit types associated with the letters.  */
1338   gfc_typespec default_type[GFC_LETTERS];
1339   /* Store the positions of IMPLICIT statements.  */
1340   locus implicit_loc[GFC_LETTERS];
1341
1342   /* If this is a namespace of a procedure, this points to the procedure.  */
1343   struct gfc_symbol *proc_name;
1344   /* If this is the namespace of a unit which contains executable
1345      code, this points to it.  */
1346   struct gfc_code *code;
1347
1348   /* Points to the equivalences set up in this namespace.  */
1349   struct gfc_equiv *equiv;
1350
1351   /* Points to the equivalence groups produced by trans_common.  */
1352   struct gfc_equiv_list *equiv_lists;
1353
1354   gfc_interface *op[GFC_INTRINSIC_OPS];
1355
1356   /* Points to the parent namespace, i.e. the namespace of a module or
1357      procedure in which the procedure belonging to this namespace is
1358      contained. The parent namespace points to this namespace either
1359      directly via CONTAINED, or indirectly via the chain built by
1360      SIBLING.  */
1361   struct gfc_namespace *parent;
1362   /* CONTAINED points to the first contained namespace. Sibling
1363      namespaces are chained via SIBLING.  */
1364   struct gfc_namespace  *contained, *sibling;
1365
1366   gfc_common_head blank_common;
1367   gfc_access default_access, operator_access[GFC_INTRINSIC_OPS];
1368
1369   gfc_st_label *st_labels;
1370   /* This list holds information about all the data initializers in
1371      this namespace.  */
1372   struct gfc_data *data;
1373
1374   gfc_charlen *cl_list, *old_cl_list;
1375
1376   gfc_dt_list *derived_types;
1377
1378   int save_all, seen_save, seen_implicit_none;
1379
1380   /* Normally we don't need to refcount namespaces.  However when we read
1381      a module containing a function with multiple entry points, this
1382      will appear as several functions with the same formal namespace.  */
1383   int refs;
1384
1385   /* A list of all alternate entry points to this procedure (or NULL).  */
1386   gfc_entry_list *entries;
1387
1388   /* A list of USE statements in this namespace.  */
1389   gfc_use_list *use_stmts;
1390
1391   /* Set to 1 if namespace is a BLOCK DATA program unit.  */
1392   unsigned is_block_data:1;
1393
1394   /* Set to 1 if namespace is an interface body with "IMPORT" used.  */
1395   unsigned has_import_set:1;
1396
1397   /* Set to 1 if resolved has been called for this namespace.
1398      Holds -1 during resolution.  */
1399   signed resolved:2;
1400
1401   /* Set to 1 if code has been generated for this namespace.  */
1402   unsigned translated:1;
1403
1404   /* Set to 1 if symbols in this namespace should be 'construct entities',
1405      i.e. for BLOCK local variables.  */
1406   unsigned construct_entities:1;
1407 }
1408 gfc_namespace;
1409
1410 extern gfc_namespace *gfc_current_ns;
1411 extern gfc_namespace *gfc_global_ns_list;
1412
1413 /* Global symbols are symbols of global scope. Currently we only use
1414    this to detect collisions already when parsing.
1415    TODO: Extend to verify procedure calls.  */
1416
1417 enum gfc_symbol_type
1418 {
1419   GSYM_UNKNOWN=1, GSYM_PROGRAM, GSYM_FUNCTION, GSYM_SUBROUTINE,
1420   GSYM_MODULE, GSYM_COMMON, GSYM_BLOCK_DATA
1421 };
1422
1423 typedef struct gfc_gsymbol
1424 {
1425   BBT_HEADER(gfc_gsymbol);
1426
1427   const char *name;
1428   const char *sym_name;
1429   const char *mod_name;
1430   const char *binding_label;
1431   enum gfc_symbol_type type;
1432
1433   int defined, used;
1434   locus where;
1435   gfc_namespace *ns;
1436 }
1437 gfc_gsymbol;
1438
1439 extern gfc_gsymbol *gfc_gsym_root;
1440
1441 /* Information on interfaces being built.  */
1442 typedef struct
1443 {
1444   interface_type type;
1445   gfc_symbol *sym;
1446   gfc_namespace *ns;
1447   gfc_user_op *uop;
1448   gfc_intrinsic_op op;
1449 }
1450 gfc_interface_info;
1451
1452 extern gfc_interface_info current_interface;
1453
1454
1455 /* Array reference.  */
1456
1457 enum gfc_array_ref_dimen_type
1458 {
1459   DIMEN_ELEMENT = 1, DIMEN_RANGE, DIMEN_VECTOR, DIMEN_STAR, DIMEN_UNKNOWN
1460 };
1461
1462 typedef struct gfc_array_ref
1463 {
1464   ar_type type;
1465   int dimen;                    /* # of components in the reference */
1466   int codimen;
1467   bool in_allocate;             /* For coarray checks. */
1468   locus where;
1469   gfc_array_spec *as;
1470
1471   locus c_where[GFC_MAX_DIMENSIONS];    /* All expressions can be NULL */
1472   struct gfc_expr *start[GFC_MAX_DIMENSIONS], *end[GFC_MAX_DIMENSIONS],
1473     *stride[GFC_MAX_DIMENSIONS];
1474
1475   enum gfc_array_ref_dimen_type dimen_type[GFC_MAX_DIMENSIONS];
1476
1477   struct gfc_expr *offset;
1478 }
1479 gfc_array_ref;
1480
1481 #define gfc_get_array_ref() XCNEW (gfc_array_ref)
1482
1483
1484 /* Component reference nodes.  A variable is stored as an expression
1485    node that points to the base symbol.  After that, a singly linked
1486    list of component reference nodes gives the variable's complete
1487    resolution.  The array_ref component may be present and comes
1488    before the component component.  */
1489
1490 typedef enum
1491   { REF_ARRAY, REF_COMPONENT, REF_SUBSTRING }
1492 ref_type;
1493
1494 typedef struct gfc_ref
1495 {
1496   ref_type type;
1497
1498   union
1499   {
1500     struct gfc_array_ref ar;
1501
1502     struct
1503     {
1504       gfc_component *component;
1505       gfc_symbol *sym;
1506     }
1507     c;
1508
1509     struct
1510     {
1511       struct gfc_expr *start, *end;     /* Substring */
1512       gfc_charlen *length;
1513     }
1514     ss;
1515
1516   }
1517   u;
1518
1519   struct gfc_ref *next;
1520 }
1521 gfc_ref;
1522
1523 #define gfc_get_ref() XCNEW (gfc_ref)
1524
1525
1526 /* Structures representing intrinsic symbols and their arguments lists.  */
1527 typedef struct gfc_intrinsic_arg
1528 {
1529   char name[GFC_MAX_SYMBOL_LEN + 1];
1530
1531   gfc_typespec ts;
1532   int optional;
1533   ENUM_BITFIELD (sym_intent) intent:2;
1534   gfc_actual_arglist *actual;
1535
1536   struct gfc_intrinsic_arg *next;
1537
1538 }
1539 gfc_intrinsic_arg;
1540
1541
1542 /* Specifies the various kinds of check functions used to verify the
1543    argument lists of intrinsic functions. fX with X an integer refer
1544    to check functions of intrinsics with X arguments. f1m is used for
1545    the MAX and MIN intrinsics which can have an arbitrary number of
1546    arguments, f3ml is used for the MINLOC and MAXLOC intrinsics as
1547    these have special semantics.  */
1548
1549 typedef union
1550 {
1551   gfc_try (*f0)(void);
1552   gfc_try (*f1)(struct gfc_expr *);
1553   gfc_try (*f1m)(gfc_actual_arglist *);
1554   gfc_try (*f2)(struct gfc_expr *, struct gfc_expr *);
1555   gfc_try (*f3)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1556   gfc_try (*f3ml)(gfc_actual_arglist *);
1557   gfc_try (*f3red)(gfc_actual_arglist *);
1558   gfc_try (*f4)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1559             struct gfc_expr *);
1560   gfc_try (*f5)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1561             struct gfc_expr *, struct gfc_expr *);
1562 }
1563 gfc_check_f;
1564
1565 /* Like gfc_check_f, these specify the type of the simplification
1566    function associated with an intrinsic. The fX are just like in
1567    gfc_check_f. cc is used for type conversion functions.  */
1568
1569 typedef union
1570 {
1571   struct gfc_expr *(*f0)(void);
1572   struct gfc_expr *(*f1)(struct gfc_expr *);
1573   struct gfc_expr *(*f2)(struct gfc_expr *, struct gfc_expr *);
1574   struct gfc_expr *(*f3)(struct gfc_expr *, struct gfc_expr *,
1575                          struct gfc_expr *);
1576   struct gfc_expr *(*f4)(struct gfc_expr *, struct gfc_expr *,
1577                          struct gfc_expr *, struct gfc_expr *);
1578   struct gfc_expr *(*f5)(struct gfc_expr *, struct gfc_expr *,
1579                          struct gfc_expr *, struct gfc_expr *,
1580                          struct gfc_expr *);
1581   struct gfc_expr *(*cc)(struct gfc_expr *, bt, int);
1582 }
1583 gfc_simplify_f;
1584
1585 /* Again like gfc_check_f, these specify the type of the resolution
1586    function associated with an intrinsic. The fX are just like in
1587    gfc_check_f. f1m is used for MIN and MAX, s1 is used for abort().  */
1588
1589 typedef union
1590 {
1591   void (*f0)(struct gfc_expr *);
1592   void (*f1)(struct gfc_expr *, struct gfc_expr *);
1593   void (*f1m)(struct gfc_expr *, struct gfc_actual_arglist *);
1594   void (*f2)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1595   void (*f3)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1596              struct gfc_expr *);
1597   void (*f4)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1598              struct gfc_expr *, struct gfc_expr *);
1599   void (*f5)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1600              struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1601   void (*s1)(struct gfc_code *);
1602 }
1603 gfc_resolve_f;
1604
1605
1606 typedef struct gfc_intrinsic_sym
1607 {
1608   const char *name, *lib_name;
1609   gfc_intrinsic_arg *formal;
1610   gfc_typespec ts;
1611   unsigned elemental:1, inquiry:1, transformational:1, pure:1,
1612     generic:1, specific:1, actual_ok:1, noreturn:1, conversion:1;
1613
1614   int standard;
1615
1616   gfc_simplify_f simplify;
1617   gfc_check_f check;
1618   gfc_resolve_f resolve;
1619   struct gfc_intrinsic_sym *specific_head, *next;
1620   gfc_isym_id id;
1621
1622 }
1623 gfc_intrinsic_sym;
1624
1625
1626 /* Expression nodes.  The expression node types deserve explanations,
1627    since the last couple can be easily misconstrued:
1628
1629    EXPR_OP         Operator node pointing to one or two other nodes
1630    EXPR_FUNCTION   Function call, symbol points to function's name
1631    EXPR_CONSTANT   A scalar constant: Logical, String, Real, Int or Complex
1632    EXPR_VARIABLE   An Lvalue with a root symbol and possible reference list
1633                    which expresses structure, array and substring refs.
1634    EXPR_NULL       The NULL pointer value (which also has a basic type).
1635    EXPR_SUBSTRING  A substring of a constant string
1636    EXPR_STRUCTURE  A structure constructor
1637    EXPR_ARRAY      An array constructor.
1638    EXPR_COMPCALL   Function (or subroutine) call of a procedure pointer
1639                    component or type-bound procedure.  */
1640
1641 #include <gmp.h>
1642 #include <mpfr.h>
1643 #include <mpc.h>
1644 #define GFC_RND_MODE GMP_RNDN
1645 #define GFC_MPC_RND_MODE MPC_RNDNN
1646
1647 typedef splay_tree gfc_constructor_base;
1648
1649 typedef struct gfc_expr
1650 {
1651   expr_t expr_type;
1652
1653   gfc_typespec ts;      /* These two refer to the overall expression */
1654
1655   int rank;
1656   mpz_t *shape;         /* Can be NULL if shape is unknown at compile time */
1657
1658   /* Nonnull for functions and structure constructors, may also used to hold the
1659      base-object for component calls.  */
1660   gfc_symtree *symtree;
1661
1662   gfc_ref *ref;
1663
1664   locus where;
1665
1666   /* True if the expression is a call to a function that returns an array,
1667      and if we have decided not to allocate temporary data for that array.
1668      is_boz is true if the integer is regarded as BOZ bitpatten and is_snan
1669      denotes a signalling not-a-number.  */
1670   unsigned int inline_noncopying_intrinsic : 1, is_boz : 1, is_snan : 1;
1671
1672   /* Sometimes, when an error has been emitted, it is necessary to prevent
1673       it from recurring.  */
1674   unsigned int error : 1;
1675
1676   /* Mark an expression where a user operator has been substituted by
1677      a function call in interface.c(gfc_extend_expr).  */
1678   unsigned int user_operator : 1;
1679
1680   /* Mark an expression as being a MOLD argument of ALLOCATE.  */
1681   unsigned int mold : 1;
1682
1683   /* If an expression comes from a Hollerith constant or compile-time
1684      evaluation of a transfer statement, it may have a prescribed target-
1685      memory representation, and these cannot always be backformed from
1686      the value.  */
1687   struct
1688   {
1689     int length;
1690     char *string;
1691   }
1692   representation;
1693
1694   union
1695   {
1696     int logical;
1697
1698     io_kind iokind;
1699
1700     mpz_t integer;
1701
1702     mpfr_t real;
1703
1704     mpc_t complex;
1705
1706     struct
1707     {
1708       gfc_intrinsic_op op;
1709       gfc_user_op *uop;
1710       struct gfc_expr *op1, *op2;
1711     }
1712     op;
1713
1714     struct
1715     {
1716       gfc_actual_arglist *actual;
1717       const char *name; /* Points to the ultimate name of the function */
1718       gfc_intrinsic_sym *isym;
1719       gfc_symbol *esym;
1720     }
1721     function;
1722
1723     struct
1724     {
1725       gfc_actual_arglist* actual;
1726       const char* name;
1727       /* Base-object, whose component was called.  NULL means that it should
1728          be taken from symtree/ref.  */
1729       struct gfc_expr* base_object;
1730       gfc_typebound_proc* tbp; /* Should overlap with esym.  */
1731
1732       /* For type-bound operators, we want to call PASS procedures but already
1733          have the full arglist; mark this, so that it is not extended by the
1734          PASS argument.  */
1735       unsigned ignore_pass:1;
1736
1737       /* Do assign-calls rather than calls, that is appropriate dependency
1738          checking.  */
1739       unsigned assign:1;
1740     }
1741     compcall;
1742
1743     struct
1744     {
1745       int length;
1746       gfc_char_t *string;
1747     }
1748     character;
1749
1750     gfc_constructor_base constructor;
1751   }
1752   value;
1753
1754 }
1755 gfc_expr;
1756
1757
1758 #define gfc_get_shape(rank) ((mpz_t *) gfc_getmem((rank)*sizeof(mpz_t)))
1759
1760 /* Structures for information associated with different kinds of
1761    numbers.  The first set of integer parameters define all there is
1762    to know about a particular kind.  The rest of the elements are
1763    computed from the first elements.  */
1764
1765 typedef struct
1766 {
1767   /* Values really representable by the target.  */
1768   mpz_t huge, pedantic_min_int, min_int;
1769
1770   int kind, radix, digits, bit_size, range;
1771
1772   /* True if the C type of the given name maps to this precision.
1773      Note that more than one bit can be set.  */
1774   unsigned int c_char : 1;
1775   unsigned int c_short : 1;
1776   unsigned int c_int : 1;
1777   unsigned int c_long : 1;
1778   unsigned int c_long_long : 1;
1779 }
1780 gfc_integer_info;
1781
1782 extern gfc_integer_info gfc_integer_kinds[];
1783
1784
1785 typedef struct
1786 {
1787   int kind, bit_size;
1788
1789   /* True if the C++ type bool, C99 type _Bool, maps to this precision.  */
1790   unsigned int c_bool : 1;
1791 }
1792 gfc_logical_info;
1793
1794 extern gfc_logical_info gfc_logical_kinds[];
1795
1796
1797 typedef struct
1798 {
1799   mpfr_t epsilon, huge, tiny, subnormal;
1800   int kind, radix, digits, min_exponent, max_exponent;
1801   int range, precision;
1802
1803   /* The precision of the type as reported by GET_MODE_PRECISION.  */
1804   int mode_precision;
1805
1806   /* True if the C type of the given name maps to this precision.
1807      Note that more than one bit can be set.  */
1808   unsigned int c_float : 1;
1809   unsigned int c_double : 1;
1810   unsigned int c_long_double : 1;
1811 }
1812 gfc_real_info;
1813
1814 extern gfc_real_info gfc_real_kinds[];
1815
1816 typedef struct
1817 {
1818   int kind, bit_size;
1819   const char *name;
1820 }
1821 gfc_character_info;
1822
1823 extern gfc_character_info gfc_character_kinds[];
1824
1825
1826 /* Equivalence structures.  Equivalent lvalues are linked along the
1827    *eq pointer, equivalence sets are strung along the *next node.  */
1828 typedef struct gfc_equiv
1829 {
1830   struct gfc_equiv *next, *eq;
1831   gfc_expr *expr;
1832   const char *module;
1833   int used;
1834 }
1835 gfc_equiv;
1836
1837 #define gfc_get_equiv() XCNEW (gfc_equiv)
1838
1839 /* Holds a single equivalence member after processing.  */
1840 typedef struct gfc_equiv_info
1841 {
1842   gfc_symbol *sym;
1843   HOST_WIDE_INT offset;
1844   HOST_WIDE_INT length;
1845   struct gfc_equiv_info *next;
1846 } gfc_equiv_info;
1847
1848 /* Holds equivalence groups, after they have been processed.  */
1849 typedef struct gfc_equiv_list
1850 {
1851   gfc_equiv_info *equiv;
1852   struct gfc_equiv_list *next;
1853 } gfc_equiv_list;
1854
1855 /* gfc_case stores the selector list of a case statement.  The *low
1856    and *high pointers can point to the same expression in the case of
1857    a single value.  If *high is NULL, the selection is from *low
1858    upwards, if *low is NULL the selection is *high downwards.
1859
1860    This structure has separate fields to allow single and double linked
1861    lists of CASEs at the same time.  The singe linked list along the NEXT
1862    field is a list of cases for a single CASE label.  The double linked
1863    list along the LEFT/RIGHT fields is used to detect overlap and to
1864    build a table of the cases for SELECT constructs with a CHARACTER
1865    case expression.  */
1866
1867 typedef struct gfc_case
1868 {
1869   /* Where we saw this case.  */
1870   locus where;
1871   int n;
1872
1873   /* Case range values.  If (low == high), it's a single value.  If one of
1874      the labels is NULL, it's an unbounded case.  If both are NULL, this
1875      represents the default case.  */
1876   gfc_expr *low, *high;
1877
1878   /* Only used for SELECT TYPE.  */
1879   gfc_typespec ts;
1880
1881   /* Next case label in the list of cases for a single CASE label.  */
1882   struct gfc_case *next;
1883
1884   /* Used for detecting overlap, and for code generation.  */
1885   struct gfc_case *left, *right;
1886
1887   /* True if this case label can never be matched.  */
1888   int unreachable;
1889 }
1890 gfc_case;
1891
1892 #define gfc_get_case() XCNEW (gfc_case)
1893
1894
1895 typedef struct
1896 {
1897   gfc_expr *var, *start, *end, *step;
1898 }
1899 gfc_iterator;
1900
1901 #define gfc_get_iterator() XCNEW (gfc_iterator)
1902
1903
1904 /* Allocation structure for ALLOCATE, DEALLOCATE and NULLIFY statements.  */
1905
1906 typedef struct gfc_alloc
1907 {
1908   gfc_expr *expr;
1909   struct gfc_alloc *next;
1910 }
1911 gfc_alloc;
1912
1913 #define gfc_get_alloc() XCNEW (gfc_alloc)
1914
1915
1916 typedef struct
1917 {
1918   gfc_expr *unit, *file, *status, *access, *form, *recl,
1919     *blank, *position, *action, *delim, *pad, *iostat, *iomsg, *convert,
1920     *decimal, *encoding, *round, *sign, *asynchronous, *id, *newunit;
1921   gfc_st_label *err;
1922 }
1923 gfc_open;
1924
1925
1926 typedef struct
1927 {
1928   gfc_expr *unit, *status, *iostat, *iomsg;
1929   gfc_st_label *err;
1930 }
1931 gfc_close;
1932
1933
1934 typedef struct
1935 {
1936   gfc_expr *unit, *iostat, *iomsg;
1937   gfc_st_label *err;
1938 }
1939 gfc_filepos;
1940
1941
1942 typedef struct
1943 {
1944   gfc_expr *unit, *file, *iostat, *exist, *opened, *number, *named,
1945     *name, *access, *sequential, *direct, *form, *formatted,
1946     *unformatted, *recl, *nextrec, *blank, *position, *action, *read,
1947     *write, *readwrite, *delim, *pad, *iolength, *iomsg, *convert, *strm_pos,
1948     *asynchronous, *decimal, *encoding, *pending, *round, *sign, *size, *id;
1949
1950   gfc_st_label *err;
1951
1952 }
1953 gfc_inquire;
1954
1955
1956 typedef struct
1957 {
1958   gfc_expr *unit, *iostat, *iomsg, *id;
1959   gfc_st_label *err, *end, *eor;
1960 }
1961 gfc_wait;
1962
1963
1964 typedef struct
1965 {
1966   gfc_expr *io_unit, *format_expr, *rec, *advance, *iostat, *size, *iomsg,
1967            *id, *pos, *asynchronous, *blank, *decimal, *delim, *pad, *round,
1968            *sign, *extra_comma;
1969
1970   gfc_symbol *namelist;
1971   /* A format_label of `format_asterisk' indicates the "*" format */
1972   gfc_st_label *format_label;
1973   gfc_st_label *err, *end, *eor;
1974
1975   locus eor_where, end_where, err_where;
1976 }
1977 gfc_dt;
1978
1979
1980 typedef struct gfc_forall_iterator
1981 {
1982   gfc_expr *var, *start, *end, *stride;
1983   struct gfc_forall_iterator *next;
1984 }
1985 gfc_forall_iterator;
1986
1987
1988 /* Linked list to store associations in an ASSOCIATE statement.  */
1989
1990 typedef struct gfc_association_list
1991 {
1992   struct gfc_association_list *next;
1993
1994   /* Whether this is association to a variable that can be changed; otherwise,
1995      it's association to an expression and the name may not be used as
1996      lvalue.  */
1997   unsigned variable:1;
1998
1999   char name[GFC_MAX_SYMBOL_LEN + 1];
2000   gfc_symtree *st; /* Symtree corresponding to name.  */
2001   gfc_expr *target;
2002 }
2003 gfc_association_list;
2004 #define gfc_get_association_list() XCNEW (gfc_association_list)
2005
2006
2007 /* Executable statements that fill gfc_code structures.  */
2008 typedef enum
2009 {
2010   EXEC_NOP = 1, EXEC_END_BLOCK, EXEC_ASSIGN, EXEC_LABEL_ASSIGN,
2011   EXEC_POINTER_ASSIGN, EXEC_CRITICAL, EXEC_ERROR_STOP,
2012   EXEC_GOTO, EXEC_CALL, EXEC_COMPCALL, EXEC_ASSIGN_CALL, EXEC_RETURN,
2013   EXEC_ENTRY, EXEC_PAUSE, EXEC_STOP, EXEC_CONTINUE, EXEC_INIT_ASSIGN,
2014   EXEC_IF, EXEC_ARITHMETIC_IF, EXEC_DO, EXEC_DO_WHILE, EXEC_SELECT, EXEC_BLOCK,
2015   EXEC_FORALL, EXEC_WHERE, EXEC_CYCLE, EXEC_EXIT, EXEC_CALL_PPC,
2016   EXEC_ALLOCATE, EXEC_DEALLOCATE, EXEC_END_PROCEDURE, EXEC_SELECT_TYPE,
2017   EXEC_SYNC_ALL, EXEC_SYNC_MEMORY, EXEC_SYNC_IMAGES,
2018   EXEC_OPEN, EXEC_CLOSE, EXEC_WAIT,
2019   EXEC_READ, EXEC_WRITE, EXEC_IOLENGTH, EXEC_TRANSFER, EXEC_DT_END,
2020   EXEC_BACKSPACE, EXEC_ENDFILE, EXEC_INQUIRE, EXEC_REWIND, EXEC_FLUSH,
2021   EXEC_OMP_CRITICAL, EXEC_OMP_DO, EXEC_OMP_FLUSH, EXEC_OMP_MASTER,
2022   EXEC_OMP_ORDERED, EXEC_OMP_PARALLEL, EXEC_OMP_PARALLEL_DO,
2023   EXEC_OMP_PARALLEL_SECTIONS, EXEC_OMP_PARALLEL_WORKSHARE,
2024   EXEC_OMP_SECTIONS, EXEC_OMP_SINGLE, EXEC_OMP_WORKSHARE,
2025   EXEC_OMP_ATOMIC, EXEC_OMP_BARRIER, EXEC_OMP_END_NOWAIT,
2026   EXEC_OMP_END_SINGLE, EXEC_OMP_TASK, EXEC_OMP_TASKWAIT
2027 }
2028 gfc_exec_op;
2029
2030 typedef struct gfc_code
2031 {
2032   gfc_exec_op op;
2033
2034   struct gfc_code *block, *next;
2035   locus loc;
2036
2037   gfc_st_label *here, *label1, *label2, *label3;
2038   gfc_symtree *symtree;
2039   gfc_expr *expr1, *expr2, *expr3;
2040   /* A name isn't sufficient to identify a subroutine, we need the actual
2041      symbol for the interface definition.
2042   const char *sub_name;  */
2043   gfc_symbol *resolved_sym;
2044   gfc_intrinsic_sym *resolved_isym;
2045
2046   union
2047   {
2048     gfc_actual_arglist *actual;
2049     gfc_case *case_list;
2050     gfc_iterator *iterator;
2051
2052     struct
2053     {
2054       gfc_typespec ts;
2055       gfc_alloc *list;
2056     }
2057     alloc;
2058
2059     struct
2060     {
2061       gfc_namespace *ns;
2062       gfc_association_list *assoc;
2063     }
2064     block;
2065
2066     gfc_open *open;
2067     gfc_close *close;
2068     gfc_filepos *filepos;
2069     gfc_inquire *inquire;
2070     gfc_wait *wait;
2071     gfc_dt *dt;
2072     gfc_forall_iterator *forall_iterator;
2073     struct gfc_code *whichloop;
2074     int stop_code;
2075     gfc_entry_list *entry;
2076     gfc_omp_clauses *omp_clauses;
2077     const char *omp_name;
2078     gfc_namelist *omp_namelist;
2079     bool omp_bool;
2080   }
2081   ext;          /* Points to additional structures required by statement */
2082
2083   /* Cycle and break labels in do loops.  */
2084   tree cycle_label;
2085   tree exit_label;
2086 }
2087 gfc_code;
2088
2089
2090 /* Storage for DATA statements.  */
2091 typedef struct gfc_data_variable
2092 {
2093   gfc_expr *expr;
2094   gfc_iterator iter;
2095   struct gfc_data_variable *list, *next;
2096 }
2097 gfc_data_variable;
2098
2099
2100 typedef struct gfc_data_value
2101 {
2102   mpz_t repeat;
2103   gfc_expr *expr;
2104   struct gfc_data_value *next;
2105 }
2106 gfc_data_value;
2107
2108
2109 typedef struct gfc_data
2110 {
2111   gfc_data_variable *var;
2112   gfc_data_value *value;
2113   locus where;
2114
2115   struct gfc_data *next;
2116 }
2117 gfc_data;
2118
2119
2120 /* Structure for holding compile options */
2121 typedef struct
2122 {
2123   char *module_dir;
2124   gfc_source_form source_form;
2125   /* Maximum line lengths in fixed- and free-form source, respectively.
2126      When fixed_line_length or free_line_length are 0, the whole line is used,
2127      regardless of length.
2128
2129      If the user requests a fixed_line_length <7 then gfc_init_options()
2130      emits a fatal error.  */
2131   int fixed_line_length;
2132   int free_line_length;
2133   /* Maximum number of continuation lines in fixed- and free-form source,
2134      respectively.  */
2135   int max_continue_fixed;
2136   int max_continue_free;
2137   int max_identifier_length;
2138   int dump_parse_tree;
2139
2140   int warn_aliasing;
2141   int warn_ampersand;
2142   int warn_conversion;
2143   int warn_conversion_extra;
2144   int warn_implicit_interface;
2145   int warn_implicit_procedure;
2146   int warn_line_truncation;
2147   int warn_surprising;
2148   int warn_tabs;
2149   int warn_underflow;
2150   int warn_intrinsic_shadow;
2151   int warn_intrinsics_std;
2152   int warn_character_truncation;
2153   int warn_array_temp;
2154   int warn_align_commons;
2155   int warn_unused_dummy_argument;
2156   int max_errors;
2157
2158   int flag_all_intrinsics;
2159   int flag_default_double;
2160   int flag_default_integer;
2161   int flag_default_real;
2162   int flag_dollar_ok;
2163   int flag_underscoring;
2164   int flag_second_underscore;
2165   int flag_implicit_none;
2166   int flag_max_stack_var_size;
2167   int flag_max_array_constructor;
2168   int flag_range_check;
2169   int flag_pack_derived;
2170   int flag_repack_arrays;
2171   int flag_preprocessed;
2172   int flag_f2c;
2173   int flag_automatic;
2174   int flag_backslash;
2175   int flag_backtrace;
2176   int flag_allow_leading_underscore;
2177   int flag_dump_core;
2178   int flag_external_blas;
2179   int blas_matmul_limit;
2180   int flag_cray_pointer;
2181   int flag_d_lines;
2182   int flag_openmp;
2183   int flag_sign_zero;
2184   int flag_module_private;
2185   int flag_recursive;
2186   int flag_init_local_zero;
2187   int flag_init_integer;
2188   int flag_init_integer_value;
2189   int flag_init_real;
2190   int flag_init_logical;
2191   int flag_init_character;
2192   char flag_init_character_value;
2193   int flag_align_commons;
2194   int flag_whole_file;
2195   int flag_protect_parens;
2196
2197   int fpe;
2198   int rtcheck;
2199   gfc_fcoarray coarray;
2200
2201   int warn_std;
2202   int allow_std;
2203   int convert;
2204   int record_marker;
2205   int max_subrecord_length;
2206 }
2207 gfc_option_t;
2208
2209 extern gfc_option_t gfc_option;
2210
2211 /* Constructor nodes for array and structure constructors.  */
2212 typedef struct gfc_constructor
2213 {
2214   gfc_constructor_base base;
2215   mpz_t offset;               /* Offset within a constructor, used as
2216                                  key within base. */
2217
2218   gfc_expr *expr;
2219   gfc_iterator *iterator;
2220   locus where;
2221
2222   union
2223   {
2224      gfc_component *component; /* Record the component being initialized.  */
2225   }
2226   n;
2227 }
2228 gfc_constructor;
2229
2230
2231 typedef struct iterator_stack
2232 {
2233   gfc_symtree *variable;
2234   mpz_t value;
2235   struct iterator_stack *prev;
2236 }
2237 iterator_stack;
2238 extern iterator_stack *iter_stack;
2239
2240
2241 /* Used for (possibly nested) SELECT TYPE statements.  */
2242 typedef struct gfc_select_type_stack
2243 {
2244   gfc_symbol *selector;                 /* Current selector variable.  */
2245   gfc_symtree *tmp;                     /* Current temporary variable.  */
2246   struct gfc_select_type_stack *prev;   /* Previous element on stack.  */
2247 }
2248 gfc_select_type_stack;
2249 extern gfc_select_type_stack *select_type_stack;
2250 #define gfc_get_select_type_stack() XCNEW (gfc_select_type_stack)
2251
2252
2253 /* Node in the linked list used for storing finalizer procedures.  */
2254
2255 typedef struct gfc_finalizer
2256 {
2257   struct gfc_finalizer* next;
2258   locus where; /* Where the FINAL declaration occurred.  */
2259
2260   /* Up to resolution, we want the gfc_symbol, there we lookup the corresponding
2261      symtree and later need only that.  This way, we can access and call the
2262      finalizers from every context as they should be "always accessible".  I
2263      don't make this a union because we need the information whether proc_sym is
2264      still referenced or not for dereferencing it on deleting a gfc_finalizer
2265      structure.  */
2266   gfc_symbol*  proc_sym;
2267   gfc_symtree* proc_tree;
2268 }
2269 gfc_finalizer;
2270 #define gfc_get_finalizer() XCNEW (gfc_finalizer)
2271
2272
2273 /************************ Function prototypes *************************/
2274
2275 /* decl.c */
2276 bool gfc_in_match_data (void);
2277 match gfc_match_char_spec (gfc_typespec *);
2278
2279 /* scanner.c */
2280 void gfc_scanner_done_1 (void);
2281 void gfc_scanner_init_1 (void);
2282
2283 void gfc_add_include_path (const char *, bool, bool);
2284 void gfc_add_intrinsic_modules_path (const char *);
2285 void gfc_release_include_path (void);
2286 FILE *gfc_open_included_file (const char *, bool, bool);
2287 FILE *gfc_open_intrinsic_module (const char *);
2288
2289 int gfc_at_end (void);
2290 int gfc_at_eof (void);
2291 int gfc_at_bol (void);
2292 int gfc_at_eol (void);
2293 void gfc_advance_line (void);
2294 int gfc_check_include (void);
2295 int gfc_define_undef_line (void);
2296
2297 int gfc_wide_is_printable (gfc_char_t);
2298 int gfc_wide_is_digit (gfc_char_t);
2299 int gfc_wide_fits_in_byte (gfc_char_t);
2300 gfc_char_t gfc_wide_tolower (gfc_char_t);
2301 gfc_char_t gfc_wide_toupper (gfc_char_t);
2302 size_t gfc_wide_strlen (const gfc_char_t *);
2303 int gfc_wide_strncasecmp (const gfc_char_t *, const char *, size_t);
2304 gfc_char_t *gfc_wide_memset (gfc_char_t *, gfc_char_t, size_t);
2305 char *gfc_widechar_to_char (const gfc_char_t *, int);
2306 gfc_char_t *gfc_char_to_widechar (const char *);
2307
2308 #define gfc_get_wide_string(n) XCNEWVEC (gfc_char_t, n)
2309
2310 void gfc_skip_comments (void);
2311 gfc_char_t gfc_next_char_literal (int);
2312 gfc_char_t gfc_next_char (void);
2313 char gfc_next_ascii_char (void);
2314 gfc_char_t gfc_peek_char (void);
2315 char gfc_peek_ascii_char (void);
2316 void gfc_error_recovery (void);
2317 void gfc_gobble_whitespace (void);
2318 gfc_try gfc_new_file (void);
2319 const char * gfc_read_orig_filename (const char *, const char **);
2320
2321 extern gfc_source_form gfc_current_form;
2322 extern const char *gfc_source_file;
2323 extern locus gfc_current_locus;
2324
2325 void gfc_start_source_files (void);
2326 void gfc_end_source_files (void);
2327
2328 /* misc.c */
2329 void *gfc_getmem (size_t) ATTRIBUTE_MALLOC;
2330 void gfc_free (void *);
2331 int gfc_terminal_width (void);
2332 void gfc_clear_ts (gfc_typespec *);
2333 FILE *gfc_open_file (const char *);
2334 const char *gfc_basic_typename (bt);
2335 const char *gfc_typename (gfc_typespec *);
2336 const char *gfc_op2string (gfc_intrinsic_op);
2337 const char *gfc_code2string (const mstring *, int);
2338 int gfc_string2code (const mstring *, const char *);
2339 const char *gfc_intent_string (sym_intent);
2340
2341 void gfc_init_1 (void);
2342 void gfc_init_2 (void);
2343 void gfc_done_1 (void);
2344 void gfc_done_2 (void);
2345
2346 int get_c_kind (const char *, CInteropKind_t *);
2347
2348 /* options.c */
2349 unsigned int gfc_init_options (unsigned int, const char **);
2350 int gfc_handle_option (size_t, const char *, int, int);
2351 bool gfc_post_options (const char **);
2352
2353 /* f95-lang.c */
2354 void gfc_maybe_initialize_eh (void);
2355
2356 /* iresolve.c */
2357 const char * gfc_get_string (const char *, ...) ATTRIBUTE_PRINTF_1;
2358 bool gfc_find_sym_in_expr (gfc_symbol *, gfc_expr *);
2359
2360 /* error.c */
2361
2362 typedef struct gfc_error_buf
2363 {
2364   int flag;
2365   size_t allocated, index;
2366   char *message;
2367 } gfc_error_buf;
2368
2369 void gfc_error_init_1 (void);
2370 void gfc_buffer_error (int);
2371
2372 const char *gfc_print_wide_char (gfc_char_t);
2373
2374 void gfc_warning (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2375 void gfc_warning_now (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2376 void gfc_clear_warning (void);
2377 void gfc_warning_check (void);
2378
2379 void gfc_error (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2380 void gfc_error_now (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2381 void gfc_fatal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_GCC_GFC(1,2);
2382 void gfc_internal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_GCC_GFC(1,2);
2383 void gfc_clear_error (void);
2384 int gfc_error_check (void);
2385 int gfc_error_flag_test (void);
2386
2387 notification gfc_notification_std (int);
2388 gfc_try gfc_notify_std (int, const char *, ...) ATTRIBUTE_GCC_GFC(2,3);
2389
2390 /* A general purpose syntax error.  */
2391 #define gfc_syntax_error(ST)    \
2392   gfc_error ("Syntax error in %s statement at %C", gfc_ascii_statement (ST));
2393
2394 void gfc_push_error (gfc_error_buf *);
2395 void gfc_pop_error (gfc_error_buf *);
2396 void gfc_free_error (gfc_error_buf *);
2397
2398 void gfc_get_errors (int *, int *);
2399 void gfc_errors_to_warnings (int);
2400
2401 /* arith.c */
2402 void gfc_arith_init_1 (void);
2403 void gfc_arith_done_1 (void);
2404 arith gfc_check_integer_range (mpz_t p, int kind);
2405 bool gfc_check_character_range (gfc_char_t, int);
2406
2407 /* trans-types.c */
2408 gfc_try gfc_check_any_c_kind (gfc_typespec *);
2409 int gfc_validate_kind (bt, int, bool);
2410 int gfc_get_int_kind_from_width_isofortranenv (int size);
2411 int gfc_get_real_kind_from_width_isofortranenv (int size);
2412 tree gfc_get_derived_type (gfc_symbol * derived);
2413 extern int gfc_index_integer_kind;
2414 extern int gfc_default_integer_kind;
2415 extern int gfc_max_integer_kind;
2416 extern int gfc_default_real_kind;
2417 extern int gfc_default_double_kind;
2418 extern int gfc_default_character_kind;
2419 extern int gfc_default_logical_kind;
2420 extern int gfc_default_complex_kind;
2421 extern int gfc_c_int_kind;
2422 extern int gfc_intio_kind;
2423 extern int gfc_charlen_int_kind;
2424 extern int gfc_numeric_storage_size;
2425 extern int gfc_character_storage_size;
2426
2427 /* symbol.c */
2428 void gfc_clear_new_implicit (void);
2429 gfc_try gfc_add_new_implicit_range (int, int);
2430 gfc_try gfc_merge_new_implicit (gfc_typespec *);
2431 void gfc_set_implicit_none (void);
2432 void gfc_check_function_type (gfc_namespace *);
2433 bool gfc_is_intrinsic_typename (const char *);
2434
2435 gfc_typespec *gfc_get_default_type (const char *, gfc_namespace *);
2436 gfc_try gfc_set_default_type (gfc_symbol *, int, gfc_namespace *);
2437
2438 void gfc_set_sym_referenced (gfc_symbol *);
2439
2440 gfc_try gfc_add_attribute (symbol_attribute *, locus *);
2441 gfc_try gfc_add_ext_attribute (symbol_attribute *, ext_attr_id_t, locus *);
2442 gfc_try gfc_add_allocatable (symbol_attribute *, locus *);
2443 gfc_try gfc_add_codimension (symbol_attribute *, const char *, locus *);
2444 gfc_try gfc_add_contiguous (symbol_attribute *, const char *, locus *);
2445 gfc_try gfc_add_dimension (symbol_attribute *, const char *, locus *);
2446 gfc_try gfc_add_external (symbol_attribute *, locus *);
2447 gfc_try gfc_add_intrinsic (symbol_attribute *, locus *);
2448 gfc_try gfc_add_optional (symbol_attribute *, locus *);
2449 gfc_try gfc_add_pointer (symbol_attribute *, locus *);
2450 gfc_try gfc_add_cray_pointer (symbol_attribute *, locus *);
2451 gfc_try gfc_add_cray_pointee (symbol_attribute *, locus *);
2452 match gfc_mod_pointee_as (gfc_array_spec *);
2453 gfc_try gfc_add_protected (symbol_attribute *, const char *, locus *);
2454 gfc_try gfc_add_result (symbol_attribute *, const char *, locus *);
2455 gfc_try gfc_add_save (symbol_attribute *, const char *, locus *);
2456 gfc_try gfc_add_threadprivate (symbol_attribute *, const char *, locus *);
2457 gfc_try gfc_add_saved_common (symbol_attribute *, locus *);
2458 gfc_try gfc_add_target (symbol_attribute *, locus *);
2459 gfc_try gfc_add_dummy (symbol_attribute *, const char *, locus *);
2460 gfc_try gfc_add_generic (symbol_attribute *, const char *, locus *);
2461 gfc_try gfc_add_common (symbol_attribute *, locus *);
2462 gfc_try gfc_add_in_common (symbol_attribute *, const char *, locus *);
2463 gfc_try gfc_add_in_equivalence (symbol_attribute *, const char *, locus *);
2464 gfc_try gfc_add_data (symbol_attribute *, const char *, locus *);
2465 gfc_try gfc_add_in_namelist (symbol_attribute *, const char *, locus *);
2466 gfc_try gfc_add_sequence (symbol_attribute *, const char *, locus *);
2467 gfc_try gfc_add_elemental (symbol_attribute *, locus *);
2468 gfc_try gfc_add_pure (symbol_attribute *, locus *);
2469 gfc_try gfc_add_recursive (symbol_attribute *, locus *);
2470 gfc_try gfc_add_function (symbol_attribute *, const char *, locus *);
2471 gfc_try gfc_add_subroutine (symbol_attribute *, const char *, locus *);
2472 gfc_try gfc_add_volatile (symbol_attribute *, const char *, locus *);
2473 gfc_try gfc_add_asynchronous (symbol_attribute *, const char *, locus *);
2474 gfc_try gfc_add_proc (symbol_attribute *attr, const char *name, locus *where);
2475 gfc_try gfc_add_abstract (symbol_attribute* attr, locus* where);
2476
2477 gfc_try gfc_add_access (symbol_attribute *, gfc_access, const char *, locus *);
2478 gfc_try gfc_add_is_bind_c (symbol_attribute *, const char *, locus *, int);
2479 gfc_try gfc_add_extension (symbol_attribute *, locus *);
2480 gfc_try gfc_add_value (symbol_attribute *, const char *, locus *);
2481 gfc_try gfc_add_flavor (symbol_attribute *, sym_flavor, const char *, locus *);
2482 gfc_try gfc_add_entry (symbol_attribute *, const char *, locus *);
2483 gfc_try gfc_add_procedure (symbol_attribute *, procedure_type,
2484                        const char *, locus *);
2485 gfc_try gfc_add_intent (symbol_attribute *, sym_intent, locus *);
2486 gfc_try gfc_add_explicit_interface (gfc_symbol *, ifsrc,
2487                                 gfc_formal_arglist *, locus *);
2488 gfc_try gfc_add_type (gfc_symbol *, gfc_typespec *, locus *);
2489
2490 void gfc_clear_attr (symbol_attribute *);
2491 gfc_try gfc_missing_attr (symbol_attribute *, locus *);
2492 gfc_try gfc_copy_attr (symbol_attribute *, symbol_attribute *, locus *);
2493
2494 gfc_try gfc_add_component (gfc_symbol *, const char *, gfc_component **);
2495 gfc_symbol *gfc_use_derived (gfc_symbol *);
2496 gfc_symtree *gfc_use_derived_tree (gfc_symtree *);
2497 gfc_component *gfc_find_component (gfc_symbol *, const char *, bool, bool);
2498
2499 gfc_st_label *gfc_get_st_label (int);
2500 void gfc_free_st_label (gfc_st_label *);
2501 void gfc_define_st_label (gfc_st_label *, gfc_sl_type, locus *);
2502 gfc_try gfc_reference_st_label (gfc_st_label *, gfc_sl_type);
2503
2504 gfc_expr * gfc_lval_expr_from_sym (gfc_symbol *);
2505
2506 gfc_namespace *gfc_get_namespace (gfc_namespace *, int);
2507 gfc_symtree *gfc_new_symtree (gfc_symtree **, const char *);
2508 gfc_symtree *gfc_find_symtree (gfc_symtree *, const char *);
2509 void gfc_delete_symtree (gfc_symtree **, const char *);
2510 gfc_symtree *gfc_get_unique_symtree (gfc_namespace *);
2511 gfc_user_op *gfc_get_uop (const char *);
2512 gfc_user_op *gfc_find_uop (const char *, gfc_namespace *);
2513 void gfc_free_symbol (gfc_symbol *);
2514 gfc_symbol *gfc_new_symbol (const char *, gfc_namespace *);
2515 gfc_symtree* gfc_find_symtree_in_proc (const char *, gfc_namespace *);
2516 int gfc_find_symbol (const char *, gfc_namespace *, int, gfc_symbol **);
2517 int gfc_find_sym_tree (const char *, gfc_namespace *, int, gfc_symtree **);
2518 int gfc_get_symbol (const char *, gfc_namespace *, gfc_symbol **);
2519 gfc_try verify_c_interop (gfc_typespec *);
2520 gfc_try verify_c_interop_param (gfc_symbol *);
2521 gfc_try verify_bind_c_sym (gfc_symbol *, gfc_typespec *, int, gfc_common_head *);
2522 gfc_try verify_bind_c_derived_type (gfc_symbol *);
2523 gfc_try verify_com_block_vars_c_interop (gfc_common_head *);
2524 void generate_isocbinding_symbol (const char *, iso_c_binding_symbol, const char *);
2525 gfc_symbol *get_iso_c_sym (gfc_symbol *, char *, char *, int);
2526 int gfc_get_sym_tree (const char *, gfc_namespace *, gfc_symtree **, bool);
2527 int gfc_get_ha_symbol (const char *, gfc_symbol **);
2528 int gfc_get_ha_sym_tree (const char *, gfc_symtree **);
2529
2530 int gfc_symbols_could_alias (gfc_symbol *, gfc_symbol *);
2531
2532 void gfc_undo_symbols (void);
2533 void gfc_commit_symbols (void);
2534 void gfc_commit_symbol (gfc_symbol *);
2535 gfc_charlen *gfc_new_charlen (gfc_namespace *, gfc_charlen *);
2536 void gfc_free_charlen (gfc_charlen *, gfc_charlen *);
2537 void gfc_free_namespace (gfc_namespace *);
2538
2539 void gfc_symbol_init_2 (void);
2540 void gfc_symbol_done_2 (void);
2541
2542 void gfc_traverse_symtree (gfc_symtree *, void (*)(gfc_symtree *));
2543 void gfc_traverse_ns (gfc_namespace *, void (*)(gfc_symbol *));
2544 void gfc_traverse_user_op (gfc_namespace *, void (*)(gfc_user_op *));
2545 void gfc_save_all (gfc_namespace *);
2546
2547 void gfc_symbol_state (void);
2548 void gfc_free_dt_list (void);
2549
2550
2551 gfc_gsymbol *gfc_get_gsymbol (const char *);
2552 gfc_gsymbol *gfc_find_gsymbol (gfc_gsymbol *, const char *);
2553
2554 gfc_typebound_proc* gfc_get_typebound_proc (gfc_typebound_proc*);
2555 gfc_symbol* gfc_get_derived_super_type (gfc_symbol*);
2556 gfc_symbol* gfc_get_ultimate_derived_super_type (gfc_symbol*);
2557 bool gfc_type_is_extension_of (gfc_symbol *, gfc_symbol *);
2558 bool gfc_type_compatible (gfc_typespec *, gfc_typespec *);
2559
2560 void gfc_copy_formal_args (gfc_symbol *, gfc_symbol *);
2561 void gfc_copy_formal_args_intr (gfc_symbol *, gfc_intrinsic_sym *);
2562 void gfc_copy_formal_args_ppc (gfc_component *, gfc_symbol *);
2563
2564 void gfc_free_finalizer (gfc_finalizer *el); /* Needed in resolve.c, too  */
2565
2566 gfc_try gfc_check_symbol_typed (gfc_symbol*, gfc_namespace*, bool, locus);
2567
2568 /* intrinsic.c -- true if working in an init-expr, false otherwise.  */
2569 extern bool gfc_init_expr_flag;
2570
2571 /* Given a symbol that we have decided is intrinsic, mark it as such
2572    by placing it into a special module that is otherwise impossible to
2573    read or write.  */
2574
2575 #define gfc_intrinsic_symbol(SYM) SYM->module = gfc_get_string ("(intrinsic)")
2576
2577 void gfc_intrinsic_init_1 (void);
2578 void gfc_intrinsic_done_1 (void);
2579
2580 char gfc_type_letter (bt);
2581 gfc_symbol * gfc_get_intrinsic_sub_symbol (const char *);
2582 gfc_try gfc_convert_type (gfc_expr *, gfc_typespec *, int);
2583 gfc_try gfc_convert_type_warn (gfc_expr *, gfc_typespec *, int, int);
2584 gfc_try gfc_convert_chartype (gfc_expr *, gfc_typespec *);
2585 int gfc_generic_intrinsic (const char *);
2586 int gfc_specific_intrinsic (const char *);
2587 bool gfc_is_intrinsic (gfc_symbol*, int, locus);
2588 int gfc_intrinsic_actual_ok (const char *, const bool);
2589 gfc_intrinsic_sym *gfc_find_function (const char *);
2590 gfc_intrinsic_sym *gfc_find_subroutine (const char *);
2591
2592 match gfc_intrinsic_func_interface (gfc_expr *, int);
2593 match gfc_intrinsic_sub_interface (gfc_code *, int);
2594
2595 void gfc_warn_intrinsic_shadow (const gfc_symbol*, bool, bool);
2596 gfc_try gfc_check_intrinsic_standard (const gfc_intrinsic_sym*, const char**,
2597                                       bool, locus);
2598
2599 /* match.c -- FIXME */
2600 void gfc_free_iterator (gfc_iterator *, int);
2601 void gfc_free_forall_iterator (gfc_forall_iterator *);
2602 void gfc_free_alloc_list (gfc_alloc *);
2603 void gfc_free_namelist (gfc_namelist *);
2604 void gfc_free_equiv (gfc_equiv *);
2605 void gfc_free_data (gfc_data *);
2606 void gfc_free_case_list (gfc_case *);
2607
2608 /* matchexp.c -- FIXME too?  */
2609 gfc_expr *gfc_get_parentheses (gfc_expr *);
2610
2611 /* openmp.c */
2612 void gfc_free_omp_clauses (gfc_omp_clauses *);
2613 void gfc_resolve_omp_directive (gfc_code *, gfc_namespace *);
2614 void gfc_resolve_do_iterator (gfc_code *, gfc_symbol *);
2615 void gfc_resolve_omp_parallel_blocks (gfc_code *, gfc_namespace *);
2616 void gfc_resolve_omp_do_blocks (gfc_code *, gfc_namespace *);
2617
2618 /* expr.c */
2619 void gfc_free_actual_arglist (gfc_actual_arglist *);
2620 gfc_actual_arglist *gfc_copy_actual_arglist (gfc_actual_arglist *);
2621 const char *gfc_extract_int (gfc_expr *, int *);
2622 bool is_subref_array (gfc_expr *);
2623 bool gfc_is_simply_contiguous (gfc_expr *, bool);
2624
2625 gfc_expr *gfc_build_conversion (gfc_expr *);
2626 void gfc_free_ref_list (gfc_ref *);
2627 void gfc_type_convert_binary (gfc_expr *, int);
2628 int gfc_is_constant_expr (gfc_expr *);
2629 gfc_try gfc_simplify_expr (gfc_expr *, int);
2630 int gfc_has_vector_index (gfc_expr *);
2631
2632 gfc_expr *gfc_get_expr (void);
2633 gfc_expr *gfc_get_array_expr (bt type, int kind, locus *);
2634 gfc_expr *gfc_get_null_expr (locus *);
2635 gfc_expr *gfc_get_operator_expr (locus *, gfc_intrinsic_op,gfc_expr *, gfc_expr *);
2636 gfc_expr *gfc_get_structure_constructor_expr (bt, int, locus *);
2637 gfc_expr *gfc_get_constant_expr (bt, int, locus *);
2638 gfc_expr *gfc_get_character_expr (int, locus *, const char *, int len);
2639 gfc_expr *gfc_get_int_expr (int, locus *, int);
2640 gfc_expr *gfc_get_logical_expr (int, locus *, bool);
2641 gfc_expr *gfc_get_iokind_expr (locus *, io_kind);
2642
2643 void gfc_free_expr (gfc_expr *);
2644 void gfc_replace_expr (gfc_expr *, gfc_expr *);
2645 mpz_t *gfc_copy_shape (mpz_t *, int);
2646 mpz_t *gfc_copy_shape_excluding (mpz_t *, int, gfc_expr *);
2647 gfc_expr *gfc_copy_expr (gfc_expr *);
2648 gfc_ref* gfc_copy_ref (gfc_ref*);
2649
2650 gfc_try gfc_specification_expr (gfc_expr *);
2651
2652 int gfc_numeric_ts (gfc_typespec *);
2653 int gfc_kind_max (gfc_expr *, gfc_expr *);
2654
2655 gfc_try gfc_check_conformance (gfc_expr *, gfc_expr *, const char *, ...) ATTRIBUTE_PRINTF_3;
2656 gfc_try gfc_check_assign (gfc_expr *, gfc_expr *, int);
2657 gfc_try gfc_check_pointer_assign (gfc_expr *, gfc_expr *);
2658 gfc_try gfc_check_assign_symbol (gfc_symbol *, gfc_expr *);
2659
2660 bool gfc_has_default_initializer (gfc_symbol *);
2661 gfc_expr *gfc_default_initializer (gfc_typespec *);
2662 gfc_expr *gfc_get_variable_expr (gfc_symtree *);
2663
2664 gfc_array_spec *gfc_get_full_arrayspec_from_expr (gfc_expr *expr);
2665
2666 bool gfc_traverse_expr (gfc_expr *, gfc_symbol *,
2667                         bool (*)(gfc_expr *, gfc_symbol *, int*),
2668                         int);
2669 void gfc_expr_set_symbols_referenced (gfc_expr *);
2670 gfc_try gfc_expr_check_typed (gfc_expr*, gfc_namespace*, bool);
2671 void gfc_expr_replace_symbols (gfc_expr *, gfc_symbol *);
2672 void gfc_expr_replace_comp (gfc_expr *, gfc_component *);
2673
2674 bool gfc_is_proc_ptr_comp (gfc_expr *, gfc_component **);
2675
2676 bool gfc_is_coindexed (gfc_expr *);
2677 bool gfc_get_corank (gfc_expr *);
2678 bool gfc_has_ultimate_allocatable (gfc_expr *);
2679 bool gfc_has_ultimate_pointer (gfc_expr *);
2680
2681
2682 /* st.c */
2683 extern gfc_code new_st;
2684
2685 void gfc_clear_new_st (void);
2686 gfc_code *gfc_get_code (void);
2687 gfc_code *gfc_append_code (gfc_code *, gfc_code *);
2688 void gfc_free_statement (gfc_code *);
2689 void gfc_free_statements (gfc_code *);
2690 void gfc_free_association_list (gfc_association_list *);
2691
2692 /* resolve.c */
2693 gfc_try gfc_resolve_expr (gfc_expr *);
2694 void gfc_resolve (gfc_namespace *);
2695 void gfc_resolve_blocks (gfc_code *, gfc_namespace *);
2696 int gfc_impure_variable (gfc_symbol *);
2697 int gfc_pure (gfc_symbol *);
2698 int gfc_elemental (gfc_symbol *);
2699 gfc_try gfc_resolve_iterator (gfc_iterator *, bool);
2700 gfc_try find_forall_index (gfc_expr *, gfc_symbol *, int);
2701 gfc_try gfc_resolve_index (gfc_expr *, int);
2702 gfc_try gfc_resolve_dim_arg (gfc_expr *);
2703 int gfc_is_formal_arg (void);
2704 void gfc_resolve_substring_charlen (gfc_expr *);
2705 match gfc_iso_c_sub_interface(gfc_code *, gfc_symbol *);
2706 gfc_expr *gfc_expr_to_initialize (gfc_expr *);
2707 bool gfc_type_is_extensible (gfc_symbol *sym);
2708
2709
2710 /* array.c */
2711 gfc_iterator *gfc_copy_iterator (gfc_iterator *);
2712
2713 void gfc_free_array_spec (gfc_array_spec *);
2714 gfc_array_ref *gfc_copy_array_ref (gfc_array_ref *);
2715
2716 gfc_try gfc_set_array_spec (gfc_symbol *, gfc_array_spec *, locus *);
2717 gfc_array_spec *gfc_copy_array_spec (gfc_array_spec *);
2718 gfc_try gfc_resolve_array_spec (gfc_array_spec *, int);
2719
2720 int gfc_compare_array_spec (gfc_array_spec *, gfc_array_spec *);
2721
2722 void gfc_simplify_iterator_var (gfc_expr *);
2723 gfc_try gfc_expand_constructor (gfc_expr *, bool);
2724 int gfc_constant_ac (gfc_expr *);
2725 int gfc_expanded_ac (gfc_expr *);
2726 gfc_try gfc_resolve_character_array_constructor (gfc_expr *);
2727 gfc_try gfc_resolve_array_constructor (gfc_expr *);
2728 gfc_try gfc_check_constructor_type (gfc_expr *);
2729 gfc_try gfc_check_iter_variable (gfc_expr *);
2730 gfc_try gfc_check_constructor (gfc_expr *, gfc_try (*)(gfc_expr *));
2731 gfc_try gfc_array_size (gfc_expr *, mpz_t *);
2732 gfc_try gfc_array_dimen_size (gfc_expr *, int, mpz_t *);
2733 gfc_try gfc_array_ref_shape (gfc_array_ref *, mpz_t *);
2734 gfc_array_ref *gfc_find_array_ref (gfc_expr *);
2735 tree gfc_conv_array_initializer (tree type, gfc_expr *);
2736 gfc_try spec_size (gfc_array_spec *, mpz_t *);
2737 gfc_try spec_dimen_size (gfc_array_spec *, int, mpz_t *);
2738 int gfc_is_compile_time_shape (gfc_array_spec *);
2739
2740 gfc_try gfc_ref_dimen_size (gfc_array_ref *, int dimen, mpz_t *);
2741
2742
2743 /* interface.c -- FIXME: some of these should be in symbol.c */
2744 void gfc_free_interface (gfc_interface *);
2745 int gfc_compare_derived_types (gfc_symbol *, gfc_symbol *);
2746 int gfc_compare_types (gfc_typespec *, gfc_typespec *);
2747 int gfc_compare_interfaces (gfc_symbol*, gfc_symbol*, const char *, int, int,
2748                             char *, int);
2749 void gfc_check_interfaces (gfc_namespace *);
2750 void gfc_procedure_use (gfc_symbol *, gfc_actual_arglist **, locus *);
2751 void gfc_ppc_use (gfc_component *, gfc_actual_arglist **, locus *);
2752 gfc_symbol *gfc_search_interface (gfc_interface *, int,
2753                                   gfc_actual_arglist **);
2754 gfc_try gfc_extend_expr (gfc_expr *, bool *);
2755 void gfc_free_formal_arglist (gfc_formal_arglist *);
2756 gfc_try gfc_extend_assign (gfc_code *, gfc_namespace *);
2757 gfc_try gfc_add_interface (gfc_symbol *);
2758 gfc_interface *gfc_current_interface_head (void);
2759 void gfc_set_current_interface_head (gfc_interface *);
2760 gfc_symtree* gfc_find_sym_in_symtree (gfc_symbol*);
2761 bool gfc_arglist_matches_symbol (gfc_actual_arglist**, gfc_symbol*);
2762 bool gfc_check_operator_interface (gfc_symbol*, gfc_intrinsic_op, locus);
2763 int gfc_has_vector_subscript (gfc_expr*);
2764
2765 /* io.c */
2766 extern gfc_st_label format_asterisk;
2767
2768 void gfc_free_open (gfc_open *);
2769 gfc_try gfc_resolve_open (gfc_open *);
2770 void gfc_free_close (gfc_close *);
2771 gfc_try gfc_resolve_close (gfc_close *);
2772 void gfc_free_filepos (gfc_filepos *);
2773 gfc_try gfc_resolve_filepos (gfc_filepos *);
2774 void gfc_free_inquire (gfc_inquire *);
2775 gfc_try gfc_resolve_inquire (gfc_inquire *);
2776 void gfc_free_dt (gfc_dt *);
2777 gfc_try gfc_resolve_dt (gfc_dt *, locus *);
2778 void gfc_free_wait (gfc_wait *);
2779 gfc_try gfc_resolve_wait (gfc_wait *);
2780
2781 /* module.c */
2782 void gfc_module_init_2 (void);
2783 void gfc_module_done_2 (void);
2784 void gfc_dump_module (const char *, int);
2785 bool gfc_check_access (gfc_access, gfc_access);
2786 void gfc_free_use_stmts (gfc_use_list *);
2787
2788 /* primary.c */
2789 symbol_attribute gfc_variable_attr (gfc_expr *, gfc_typespec *);
2790 symbol_attribute gfc_expr_attr (gfc_expr *);
2791 match gfc_match_rvalue (gfc_expr **);
2792 match gfc_match_varspec (gfc_expr*, int, bool, bool);
2793 int gfc_check_digit (char, int);
2794 bool gfc_is_function_return_value (gfc_symbol *, gfc_namespace *);
2795
2796 /* trans.c */
2797 void gfc_generate_code (gfc_namespace *);
2798 void gfc_generate_module_code (gfc_namespace *);
2799
2800 /* bbt.c */
2801 typedef int (*compare_fn) (void *, void *);
2802 void gfc_insert_bbt (void *, void *, compare_fn);
2803 void gfc_delete_bbt (void *, void *, compare_fn);
2804
2805 /* dump-parse-tree.c */
2806 void gfc_dump_parse_tree (gfc_namespace *, FILE *);
2807
2808 /* parse.c */
2809 gfc_try gfc_parse_file (void);
2810 void gfc_global_used (gfc_gsymbol *, locus *);
2811
2812 /* dependency.c */
2813 int gfc_dep_compare_expr (gfc_expr *, gfc_expr *);
2814
2815 /* check.c */
2816 gfc_try gfc_check_same_strlen (const gfc_expr*, const gfc_expr*, const char*);
2817
2818 /* class.c */
2819 void gfc_add_component_ref (gfc_expr *, const char *);
2820 gfc_expr *gfc_class_null_initializer (gfc_typespec *);
2821 gfc_try gfc_build_class_symbol (gfc_typespec *, symbol_attribute *,
2822                                 gfc_array_spec **, bool);
2823 gfc_symbol *gfc_find_derived_vtab (gfc_symbol *);
2824 gfc_symtree* gfc_find_typebound_proc (gfc_symbol*, gfc_try*,
2825                                       const char*, bool, locus*);
2826 gfc_symtree* gfc_find_typebound_user_op (gfc_symbol*, gfc_try*,
2827                                          const char*, bool, locus*);
2828 gfc_typebound_proc* gfc_find_typebound_intrinsic_op (gfc_symbol*, gfc_try*,
2829                                                      gfc_intrinsic_op, bool,
2830                                                      locus*);
2831 gfc_symtree* gfc_get_tbp_symtree (gfc_symtree**, const char*);
2832
2833 #define CLASS_DATA(sym) sym->ts.u.derived->components
2834
2835 #endif /* GCC_GFORTRAN_H  */