1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
30 gfc_st_label format_asterisk
=
31 {0, NULL
, NULL
, -1, ST_LABEL_FORMAT
, ST_LABEL_FORMAT
, NULL
,
36 const char *name
, *spec
;
42 tag_file
= { "FILE", " file = %e", BT_CHARACTER
},
43 tag_status
= { "STATUS", " status = %e", BT_CHARACTER
},
44 tag_e_access
= {"ACCESS", " access = %e", BT_CHARACTER
},
45 tag_e_form
= {"FORM", " form = %e", BT_CHARACTER
},
46 tag_e_recl
= {"RECL", " recl = %e", BT_INTEGER
},
47 tag_e_blank
= {"BLANK", " blank = %e", BT_CHARACTER
},
48 tag_e_position
= {"POSITION", " position = %e", BT_CHARACTER
},
49 tag_e_action
= {"ACTION", " action = %e", BT_CHARACTER
},
50 tag_e_delim
= {"DELIM", " delim = %e", BT_CHARACTER
},
51 tag_e_pad
= {"PAD", " pad = %e", BT_CHARACTER
},
52 tag_unit
= {"UNIT", " unit = %e", BT_INTEGER
},
53 tag_advance
= {"ADVANCE", " advance = %e", BT_CHARACTER
},
54 tag_rec
= {"REC", " rec = %e", BT_INTEGER
},
55 tag_format
= {"FORMAT", NULL
, BT_CHARACTER
},
56 tag_iomsg
= {"IOMSG", " iomsg = %e", BT_CHARACTER
},
57 tag_iostat
= {"IOSTAT", " iostat = %v", BT_INTEGER
},
58 tag_size
= {"SIZE", " size = %v", BT_INTEGER
},
59 tag_exist
= {"EXIST", " exist = %v", BT_LOGICAL
},
60 tag_opened
= {"OPENED", " opened = %v", BT_LOGICAL
},
61 tag_named
= {"NAMED", " named = %v", BT_LOGICAL
},
62 tag_name
= {"NAME", " name = %v", BT_CHARACTER
},
63 tag_number
= {"NUMBER", " number = %v", BT_INTEGER
},
64 tag_s_access
= {"ACCESS", " access = %v", BT_CHARACTER
},
65 tag_sequential
= {"SEQUENTIAL", " sequential = %v", BT_CHARACTER
},
66 tag_direct
= {"DIRECT", " direct = %v", BT_CHARACTER
},
67 tag_s_form
= {"FORM", " form = %v", BT_CHARACTER
},
68 tag_formatted
= {"FORMATTED", " formatted = %v", BT_CHARACTER
},
69 tag_unformatted
= {"UNFORMATTED", " unformatted = %v", BT_CHARACTER
},
70 tag_s_recl
= {"RECL", " recl = %v", BT_INTEGER
},
71 tag_nextrec
= {"NEXTREC", " nextrec = %v", BT_INTEGER
},
72 tag_s_blank
= {"BLANK", " blank = %v", BT_CHARACTER
},
73 tag_s_position
= {"POSITION", " position = %v", BT_CHARACTER
},
74 tag_s_action
= {"ACTION", " action = %v", BT_CHARACTER
},
75 tag_read
= {"READ", " read = %v", BT_CHARACTER
},
76 tag_write
= {"WRITE", " write = %v", BT_CHARACTER
},
77 tag_readwrite
= {"READWRITE", " readwrite = %v", BT_CHARACTER
},
78 tag_s_delim
= {"DELIM", " delim = %v", BT_CHARACTER
},
79 tag_s_pad
= {"PAD", " pad = %v", BT_CHARACTER
},
80 tag_iolength
= {"IOLENGTH", " iolength = %v", BT_INTEGER
},
81 tag_convert
= {"CONVERT", " convert = %e", BT_CHARACTER
},
82 tag_err
= {"ERR", " err = %l", BT_UNKNOWN
},
83 tag_end
= {"END", " end = %l", BT_UNKNOWN
},
84 tag_eor
= {"EOR", " eor = %l", BT_UNKNOWN
};
86 static gfc_dt
*current_dt
;
88 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
91 /**************** Fortran 95 FORMAT parser *****************/
93 /* FORMAT tokens returned by format_lex(). */
96 FMT_NONE
, FMT_UNKNOWN
, FMT_SIGNED_INT
, FMT_ZERO
, FMT_POSINT
, FMT_PERIOD
,
97 FMT_COMMA
, FMT_COLON
, FMT_SLASH
, FMT_DOLLAR
, FMT_POS
, FMT_LPAREN
,
98 FMT_RPAREN
, FMT_X
, FMT_SIGN
, FMT_BLANK
, FMT_CHAR
, FMT_P
, FMT_IBOZ
, FMT_F
,
99 FMT_E
, FMT_EXT
, FMT_G
, FMT_L
, FMT_A
, FMT_D
, FMT_H
, FMT_END
103 /* Local variables for checking format strings. The saved_token is
104 used to back up by a single format token during the parsing
106 static char *format_string
;
107 static int format_length
, use_last_char
;
109 static format_token saved_token
;
112 { MODE_STRING
, MODE_FORMAT
, MODE_COPY
}
116 /* Return the next character in the format string. */
119 next_char (int in_string
)
131 if (mode
== MODE_STRING
)
132 c
= *format_string
++;
135 c
= gfc_next_char_literal (in_string
);
139 if (mode
== MODE_COPY
)
140 *format_string
++ = c
;
148 /* Back up one character position. Only works once. */
157 /* Eat up the spaces and return a character. */
160 next_char_not_space(void)
167 while (gfc_is_whitespace (c
));
171 static int value
= 0;
173 /* Simple lexical analyzer for getting the next token in a FORMAT
184 if (saved_token
!= FMT_NONE
)
187 saved_token
= FMT_NONE
;
191 c
= next_char_not_space ();
199 c
= next_char_not_space ();
210 c
= next_char_not_space ();
212 value
= 10 * value
+ c
- '0';
221 token
= FMT_SIGNED_INT
;
240 c
= next_char_not_space ();
244 value
= 10 * value
+ c
- '0';
249 token
= zflag
? FMT_ZERO
: FMT_POSINT
;
273 c
= next_char_not_space ();
274 if (c
!= 'L' && c
!= 'R')
293 c
= next_char_not_space ();
294 if (c
!= 'P' && c
!= 'S')
301 c
= next_char_not_space ();
302 if (c
== 'N' || c
== 'Z')
363 c
= next_char_not_space ();
364 if (c
== 'N' || c
== 'S')
407 /* Check a format statement. The format string, either from a FORMAT
408 statement or a constant in an I/O statement has already been parsed
409 by itself, and we are checking it for validity. The dual origin
410 means that the warning message is a little less than great. */
415 const char *posint_required
= _("Positive width required");
416 const char *nonneg_required
= _("Nonnegative width required");
417 const char *unexpected_element
= _("Unexpected element");
418 const char *unexpected_end
= _("Unexpected end of format string");
427 saved_token
= FMT_NONE
;
435 error
= _("Missing leading left parenthesis");
441 goto finished
; /* Empty format is legal */
445 /* In this state, the next thing has to be a format item. */
469 /* Signed integer can only precede a P format. */
473 error
= _("Expected P edit descriptor");
480 /* P requires a prior number. */
481 error
= _("P descriptor requires leading scale factor");
485 /* X requires a prior number if we're being pedantic. */
486 if (gfc_notify_std (GFC_STD_GNU
, "Extension: X descriptor "
487 "requires leading space count at %C")
497 goto extension_optional_comma
;
506 if (gfc_notify_std (GFC_STD_GNU
, "Extension: $ descriptor at %C")
509 if (t
!= FMT_RPAREN
|| level
> 0)
511 error
= _("$ must be the last specifier");
532 error
= unexpected_end
;
536 error
= unexpected_element
;
541 /* In this state, t must currently be a data descriptor.
542 Deal with things that can/must follow the descriptor. */
556 error
= _("Repeat count cannot follow P descriptor");
571 switch (gfc_notification_std (GFC_STD_GNU
))
575 ("Extension: Missing positive width after L descriptor at %C");
580 error
= posint_required
;
605 error
= posint_required
;
612 /* Warn if -std=legacy, otherwise error. */
613 if (gfc_option
.warn_std
!= 0)
614 gfc_error_now ("Period required in format specifier at %C");
616 gfc_warning ("Period required in format specifier at %C");
622 if (u
!= FMT_ZERO
&& u
!= FMT_POSINT
)
624 error
= nonneg_required
;
631 /* Look for optional exponent. */
642 error
= _("Positive exponent width required");
651 if (t
!= FMT_ZERO
&& t
!= FMT_POSINT
)
653 error
= nonneg_required
;
660 /* Warn if -std=legacy, otherwise error. */
661 if (gfc_option
.warn_std
!= 0)
662 gfc_error_now ("Period required in format specifier at %C");
664 gfc_warning ("Period required in format specifier at %C");
670 if (t
!= FMT_ZERO
&& t
!= FMT_POSINT
)
672 error
= nonneg_required
;
679 if(mode
== MODE_STRING
)
681 format_string
+= value
;
682 format_length
-= value
;
696 if (t
!= FMT_ZERO
&& t
!= FMT_POSINT
)
698 error
= nonneg_required
;
710 if (t
!= FMT_ZERO
&& t
!= FMT_POSINT
)
712 error
= nonneg_required
;
720 error
= unexpected_element
;
725 /* Between a descriptor and what comes next. */
744 error
= unexpected_end
;
748 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Missing comma at %C")
755 /* Optional comma is a weird between state where we've just finished
756 reading a colon, slash or P descriptor. */
770 /* Assume that we have another format item. */
777 extension_optional_comma
:
778 /* As a GNU extension, permit a missing comma after a string literal. */
796 error
= unexpected_end
;
800 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Missing comma at %C")
810 /* Something went wrong. If the format we're checking is a string,
811 generate a warning, since the program is correct. If the format
812 is in a FORMAT statement, this messes up parsing, which is an
814 if (mode
!= MODE_STRING
)
815 gfc_error ("%s in format string at %C", error
);
818 gfc_warning ("%s in format string at %C", error
);
820 /* TODO: More elaborate measures are needed to show where a problem
821 is within a format string that has been calculated. */
831 /* Given an expression node that is a constant string, see if it looks
832 like a format string. */
835 check_format_string (gfc_expr
* e
)
839 format_string
= e
->value
.character
.string
;
844 /************ Fortran 95 I/O statement matchers *************/
846 /* Match a FORMAT statement. This amounts to actually parsing the
847 format descriptors in order to correctly locate the end of the
851 gfc_match_format (void)
856 if (gfc_current_ns
->proc_name
857 && gfc_current_ns
->proc_name
->attr
.flavor
== FL_MODULE
)
859 gfc_error ("Format statement in module main block at %C.");
863 if (gfc_statement_label
== NULL
)
865 gfc_error ("Missing format label at %C");
868 gfc_gobble_whitespace ();
873 start
= gfc_current_locus
;
875 if (check_format () == FAILURE
)
878 if (gfc_match_eos () != MATCH_YES
)
880 gfc_syntax_error (ST_FORMAT
);
884 /* The label doesn't get created until after the statement is done
885 being matched, so we have to leave the string for later. */
887 gfc_current_locus
= start
; /* Back to the beginning */
890 new_st
.op
= EXEC_NOP
;
893 e
->expr_type
= EXPR_CONSTANT
;
894 e
->ts
.type
= BT_CHARACTER
;
895 e
->ts
.kind
= gfc_default_character_kind
;
897 e
->value
.character
.string
= format_string
= gfc_getmem(format_length
+1);
898 e
->value
.character
.length
= format_length
;
899 gfc_statement_label
->format
= e
;
902 check_format (); /* Guaranteed to succeed */
903 gfc_match_eos (); /* Guaranteed to succeed */
909 /* Match an expression I/O tag of some sort. */
912 match_etag (const io_tag
* tag
, gfc_expr
** v
)
917 m
= gfc_match (tag
->spec
, &result
);
923 gfc_error ("Duplicate %s specification at %C", tag
->name
);
924 gfc_free_expr (result
);
933 /* Match a variable I/O tag of some sort. */
936 match_vtag (const io_tag
* tag
, gfc_expr
** v
)
941 m
= gfc_match (tag
->spec
, &result
);
947 gfc_error ("Duplicate %s specification at %C", tag
->name
);
948 gfc_free_expr (result
);
952 if (result
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
954 gfc_error ("Variable tag cannot be INTENT(IN) at %C");
955 gfc_free_expr (result
);
959 if (gfc_pure (NULL
) && gfc_impure_variable (result
->symtree
->n
.sym
))
961 gfc_error ("Variable tag cannot be assigned in PURE procedure at %C");
962 gfc_free_expr (result
);
971 /* Match I/O tags that cause variables to become redefined. */
974 match_out_tag(const io_tag
*tag
, gfc_expr
**result
)
978 m
= match_vtag(tag
, result
);
980 gfc_check_do_variable((*result
)->symtree
);
986 /* Match a label I/O tag. */
989 match_ltag (const io_tag
* tag
, gfc_st_label
** label
)
995 m
= gfc_match (tag
->spec
, label
);
996 if (m
== MATCH_YES
&& old
!= 0)
998 gfc_error ("Duplicate %s label specification at %C", tag
->name
);
1003 && gfc_reference_st_label (*label
, ST_LABEL_TARGET
) == FAILURE
)
1010 /* Do expression resolution and type-checking on an expression tag. */
1013 resolve_tag (const io_tag
* tag
, gfc_expr
* e
)
1019 if (gfc_resolve_expr (e
) == FAILURE
)
1022 if (e
->ts
.type
!= tag
->type
&& tag
!= &tag_format
)
1024 gfc_error ("%s tag at %L must be of type %s", tag
->name
,
1025 &e
->where
, gfc_basic_typename (tag
->type
));
1029 if (tag
== &tag_format
)
1031 if (e
->expr_type
== EXPR_CONSTANT
1032 && (e
->ts
.type
!= BT_CHARACTER
1033 || e
->ts
.kind
!= gfc_default_character_kind
))
1035 gfc_error ("Constant expression in FORMAT tag at %L must be "
1036 "of type default CHARACTER", &e
->where
);
1040 /* If e's rank is zero and e is not an element of an array, it should be
1041 of integer or character type. The integer variable should be
1043 if (e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
1044 || e
->symtree
->n
.sym
->as
->rank
== 0)
1046 if (e
->ts
.type
!= BT_CHARACTER
&& e
->ts
.type
!= BT_INTEGER
)
1048 gfc_error ("%s tag at %L must be of type %s or %s", tag
->name
,
1049 &e
->where
, gfc_basic_typename (BT_CHARACTER
),
1050 gfc_basic_typename (BT_INTEGER
));
1053 else if (e
->ts
.type
== BT_INTEGER
&& e
->expr_type
== EXPR_VARIABLE
)
1055 if (gfc_notify_std (GFC_STD_F95_DEL
,
1056 "Obsolete: ASSIGNED variable in FORMAT tag at %L",
1057 &e
->where
) == FAILURE
)
1059 if (e
->symtree
->n
.sym
->attr
.assign
!= 1)
1061 gfc_error ("Variable '%s' at %L has not been assigned a "
1062 "format label", e
->symtree
->n
.sym
->name
, &e
->where
);
1070 /* if rank is nonzero, we allow the type to be character under
1071 GFC_STD_GNU and other type under GFC_STD_LEGACY. It may be
1072 assigned an Hollerith constant. */
1073 if (e
->ts
.type
== BT_CHARACTER
)
1075 if (gfc_notify_std (GFC_STD_GNU
,
1076 "Extension: Character array in FORMAT tag at %L",
1077 &e
->where
) == FAILURE
)
1082 if (gfc_notify_std (GFC_STD_LEGACY
,
1083 "Extension: Non-character in FORMAT tag at %L",
1084 &e
->where
) == FAILURE
)
1094 gfc_error ("%s tag at %L must be scalar", tag
->name
, &e
->where
);
1098 if (tag
== &tag_iomsg
)
1100 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: IOMSG tag at %L",
1101 &e
->where
) == FAILURE
)
1105 if (tag
== &tag_iostat
&& e
->ts
.kind
!= gfc_default_integer_kind
)
1107 if (gfc_notify_std (GFC_STD_GNU
, "Fortran 95 requires default "
1108 "INTEGER in IOSTAT tag at %L",
1109 &e
->where
) == FAILURE
)
1113 if (tag
== &tag_size
&& e
->ts
.kind
!= gfc_default_integer_kind
)
1115 if (gfc_notify_std (GFC_STD_GNU
, "Fortran 95 requires default "
1116 "INTEGER in SIZE tag at %L",
1117 &e
->where
) == FAILURE
)
1121 if (tag
== &tag_convert
)
1123 if (gfc_notify_std (GFC_STD_GNU
, "Extension: CONVERT tag at %L",
1124 &e
->where
) == FAILURE
)
1133 /* Match a single tag of an OPEN statement. */
1136 match_open_element (gfc_open
* open
)
1140 m
= match_etag (&tag_unit
, &open
->unit
);
1143 m
= match_out_tag (&tag_iomsg
, &open
->iomsg
);
1146 m
= match_out_tag (&tag_iostat
, &open
->iostat
);
1149 m
= match_etag (&tag_file
, &open
->file
);
1152 m
= match_etag (&tag_status
, &open
->status
);
1155 m
= match_etag (&tag_e_access
, &open
->access
);
1158 m
= match_etag (&tag_e_form
, &open
->form
);
1161 m
= match_etag (&tag_e_recl
, &open
->recl
);
1164 m
= match_etag (&tag_e_blank
, &open
->blank
);
1167 m
= match_etag (&tag_e_position
, &open
->position
);
1170 m
= match_etag (&tag_e_action
, &open
->action
);
1173 m
= match_etag (&tag_e_delim
, &open
->delim
);
1176 m
= match_etag (&tag_e_pad
, &open
->pad
);
1179 m
= match_ltag (&tag_err
, &open
->err
);
1182 m
= match_etag (&tag_convert
, &open
->convert
);
1190 /* Free the gfc_open structure and all the expressions it contains. */
1193 gfc_free_open (gfc_open
* open
)
1199 gfc_free_expr (open
->unit
);
1200 gfc_free_expr (open
->iomsg
);
1201 gfc_free_expr (open
->iostat
);
1202 gfc_free_expr (open
->file
);
1203 gfc_free_expr (open
->status
);
1204 gfc_free_expr (open
->access
);
1205 gfc_free_expr (open
->form
);
1206 gfc_free_expr (open
->recl
);
1207 gfc_free_expr (open
->blank
);
1208 gfc_free_expr (open
->position
);
1209 gfc_free_expr (open
->action
);
1210 gfc_free_expr (open
->delim
);
1211 gfc_free_expr (open
->pad
);
1212 gfc_free_expr (open
->convert
);
1218 /* Resolve everything in a gfc_open structure. */
1221 gfc_resolve_open (gfc_open
* open
)
1224 RESOLVE_TAG (&tag_unit
, open
->unit
);
1225 RESOLVE_TAG (&tag_iomsg
, open
->iomsg
);
1226 RESOLVE_TAG (&tag_iostat
, open
->iostat
);
1227 RESOLVE_TAG (&tag_file
, open
->file
);
1228 RESOLVE_TAG (&tag_status
, open
->status
);
1229 RESOLVE_TAG (&tag_e_access
, open
->access
);
1230 RESOLVE_TAG (&tag_e_form
, open
->form
);
1231 RESOLVE_TAG (&tag_e_recl
, open
->recl
);
1233 RESOLVE_TAG (&tag_e_blank
, open
->blank
);
1234 RESOLVE_TAG (&tag_e_position
, open
->position
);
1235 RESOLVE_TAG (&tag_e_action
, open
->action
);
1236 RESOLVE_TAG (&tag_e_delim
, open
->delim
);
1237 RESOLVE_TAG (&tag_e_pad
, open
->pad
);
1238 RESOLVE_TAG (&tag_convert
, open
->convert
);
1240 if (gfc_reference_st_label (open
->err
, ST_LABEL_TARGET
) == FAILURE
)
1247 /* Match an OPEN statement. */
1250 gfc_match_open (void)
1255 m
= gfc_match_char ('(');
1259 open
= gfc_getmem (sizeof (gfc_open
));
1261 m
= match_open_element (open
);
1263 if (m
== MATCH_ERROR
)
1267 m
= gfc_match_expr (&open
->unit
);
1270 if (m
== MATCH_ERROR
)
1276 if (gfc_match_char (')') == MATCH_YES
)
1278 if (gfc_match_char (',') != MATCH_YES
)
1281 m
= match_open_element (open
);
1282 if (m
== MATCH_ERROR
)
1288 if (gfc_match_eos () == MATCH_NO
)
1291 if (gfc_pure (NULL
))
1293 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1297 new_st
.op
= EXEC_OPEN
;
1298 new_st
.ext
.open
= open
;
1302 gfc_syntax_error (ST_OPEN
);
1305 gfc_free_open (open
);
1310 /* Free a gfc_close structure an all its expressions. */
1313 gfc_free_close (gfc_close
* close
)
1319 gfc_free_expr (close
->unit
);
1320 gfc_free_expr (close
->iomsg
);
1321 gfc_free_expr (close
->iostat
);
1322 gfc_free_expr (close
->status
);
1328 /* Match elements of a CLOSE statement. */
1331 match_close_element (gfc_close
* close
)
1335 m
= match_etag (&tag_unit
, &close
->unit
);
1338 m
= match_etag (&tag_status
, &close
->status
);
1341 m
= match_out_tag (&tag_iomsg
, &close
->iomsg
);
1344 m
= match_out_tag (&tag_iostat
, &close
->iostat
);
1347 m
= match_ltag (&tag_err
, &close
->err
);
1355 /* Match a CLOSE statement. */
1358 gfc_match_close (void)
1363 m
= gfc_match_char ('(');
1367 close
= gfc_getmem (sizeof (gfc_close
));
1369 m
= match_close_element (close
);
1371 if (m
== MATCH_ERROR
)
1375 m
= gfc_match_expr (&close
->unit
);
1378 if (m
== MATCH_ERROR
)
1384 if (gfc_match_char (')') == MATCH_YES
)
1386 if (gfc_match_char (',') != MATCH_YES
)
1389 m
= match_close_element (close
);
1390 if (m
== MATCH_ERROR
)
1396 if (gfc_match_eos () == MATCH_NO
)
1399 if (gfc_pure (NULL
))
1401 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
1405 new_st
.op
= EXEC_CLOSE
;
1406 new_st
.ext
.close
= close
;
1410 gfc_syntax_error (ST_CLOSE
);
1413 gfc_free_close (close
);
1418 /* Resolve everything in a gfc_close structure. */
1421 gfc_resolve_close (gfc_close
* close
)
1424 RESOLVE_TAG (&tag_unit
, close
->unit
);
1425 RESOLVE_TAG (&tag_iomsg
, close
->iomsg
);
1426 RESOLVE_TAG (&tag_iostat
, close
->iostat
);
1427 RESOLVE_TAG (&tag_status
, close
->status
);
1429 if (gfc_reference_st_label (close
->err
, ST_LABEL_TARGET
) == FAILURE
)
1436 /* Free a gfc_filepos structure. */
1439 gfc_free_filepos (gfc_filepos
* fp
)
1442 gfc_free_expr (fp
->unit
);
1443 gfc_free_expr (fp
->iomsg
);
1444 gfc_free_expr (fp
->iostat
);
1449 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
1452 match_file_element (gfc_filepos
* fp
)
1456 m
= match_etag (&tag_unit
, &fp
->unit
);
1459 m
= match_out_tag (&tag_iomsg
, &fp
->iomsg
);
1462 m
= match_out_tag (&tag_iostat
, &fp
->iostat
);
1465 m
= match_ltag (&tag_err
, &fp
->err
);
1473 /* Match the second half of the file-positioning statements, REWIND,
1474 BACKSPACE, ENDFILE, or the FLUSH statement. */
1477 match_filepos (gfc_statement st
, gfc_exec_op op
)
1482 fp
= gfc_getmem (sizeof (gfc_filepos
));
1484 if (gfc_match_char ('(') == MATCH_NO
)
1486 m
= gfc_match_expr (&fp
->unit
);
1487 if (m
== MATCH_ERROR
)
1495 m
= match_file_element (fp
);
1496 if (m
== MATCH_ERROR
)
1500 m
= gfc_match_expr (&fp
->unit
);
1501 if (m
== MATCH_ERROR
)
1509 if (gfc_match_char (')') == MATCH_YES
)
1511 if (gfc_match_char (',') != MATCH_YES
)
1514 m
= match_file_element (fp
);
1515 if (m
== MATCH_ERROR
)
1522 if (gfc_match_eos () != MATCH_YES
)
1525 if (gfc_pure (NULL
))
1527 gfc_error ("%s statement not allowed in PURE procedure at %C",
1528 gfc_ascii_statement (st
));
1534 new_st
.ext
.filepos
= fp
;
1538 gfc_syntax_error (st
);
1541 gfc_free_filepos (fp
);
1547 gfc_resolve_filepos (gfc_filepos
* fp
)
1550 RESOLVE_TAG (&tag_unit
, fp
->unit
);
1551 RESOLVE_TAG (&tag_iostat
, fp
->iostat
);
1552 RESOLVE_TAG (&tag_iomsg
, fp
->iomsg
);
1553 if (gfc_reference_st_label (fp
->err
, ST_LABEL_TARGET
) == FAILURE
)
1560 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
1561 and the FLUSH statement. */
1564 gfc_match_endfile (void)
1567 return match_filepos (ST_END_FILE
, EXEC_ENDFILE
);
1571 gfc_match_backspace (void)
1574 return match_filepos (ST_BACKSPACE
, EXEC_BACKSPACE
);
1578 gfc_match_rewind (void)
1581 return match_filepos (ST_REWIND
, EXEC_REWIND
);
1585 gfc_match_flush (void)
1587 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: FLUSH statement at %C") == FAILURE
)
1590 return match_filepos (ST_FLUSH
, EXEC_FLUSH
);
1593 /******************** Data Transfer Statements *********************/
1596 { M_READ
, M_WRITE
, M_PRINT
, M_INQUIRE
}
1600 /* Return a default unit number. */
1603 default_unit (io_kind k
)
1612 return gfc_int_expr (unit
);
1616 /* Match a unit specification for a data transfer statement. */
1619 match_dt_unit (io_kind k
, gfc_dt
* dt
)
1623 if (gfc_match_char ('*') == MATCH_YES
)
1625 if (dt
->io_unit
!= NULL
)
1628 dt
->io_unit
= default_unit (k
);
1632 if (gfc_match_expr (&e
) == MATCH_YES
)
1634 if (dt
->io_unit
!= NULL
)
1647 gfc_error ("Duplicate UNIT specification at %C");
1652 /* Match a format specification. */
1655 match_dt_format (gfc_dt
* dt
)
1659 gfc_st_label
*label
;
1661 where
= gfc_current_locus
;
1663 if (gfc_match_char ('*') == MATCH_YES
)
1665 if (dt
->format_expr
!= NULL
|| dt
->format_label
!= NULL
)
1668 dt
->format_label
= &format_asterisk
;
1672 if (gfc_match_st_label (&label
) == MATCH_YES
)
1674 if (dt
->format_expr
!= NULL
|| dt
->format_label
!= NULL
)
1676 gfc_free_st_label (label
);
1680 if (gfc_reference_st_label (label
, ST_LABEL_FORMAT
) == FAILURE
)
1683 dt
->format_label
= label
;
1687 if (gfc_match_expr (&e
) == MATCH_YES
)
1689 if (dt
->format_expr
!= NULL
|| dt
->format_label
!= NULL
)
1694 dt
->format_expr
= e
;
1698 gfc_current_locus
= where
; /* The only case where we have to restore */
1703 gfc_error ("Duplicate format specification at %C");
1708 /* Traverse a namelist that is part of a READ statement to make sure
1709 that none of the variables in the namelist are INTENT(IN). Returns
1710 nonzero if we find such a variable. */
1713 check_namelist (gfc_symbol
* sym
)
1717 for (p
= sym
->namelist
; p
; p
= p
->next
)
1718 if (p
->sym
->attr
.intent
== INTENT_IN
)
1720 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
1721 p
->sym
->name
, sym
->name
);
1729 /* Match a single data transfer element. */
1732 match_dt_element (io_kind k
, gfc_dt
* dt
)
1734 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1738 if (gfc_match (" unit =") == MATCH_YES
)
1740 m
= match_dt_unit (k
, dt
);
1745 if (gfc_match (" fmt =") == MATCH_YES
)
1747 m
= match_dt_format (dt
);
1752 if (gfc_match (" nml = %n", name
) == MATCH_YES
)
1754 if (dt
->namelist
!= NULL
)
1756 gfc_error ("Duplicate NML specification at %C");
1760 if (gfc_find_symbol (name
, NULL
, 1, &sym
))
1763 if (sym
== NULL
|| sym
->attr
.flavor
!= FL_NAMELIST
)
1765 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
1766 sym
!= NULL
? sym
->name
: name
);
1771 if (k
== M_READ
&& check_namelist (sym
))
1777 m
= match_etag (&tag_rec
, &dt
->rec
);
1780 m
= match_out_tag (&tag_iomsg
, &dt
->iomsg
);
1783 m
= match_out_tag (&tag_iostat
, &dt
->iostat
);
1786 m
= match_ltag (&tag_err
, &dt
->err
);
1788 dt
->err_where
= gfc_current_locus
;
1791 m
= match_etag (&tag_advance
, &dt
->advance
);
1794 m
= match_out_tag (&tag_size
, &dt
->size
);
1798 m
= match_ltag (&tag_end
, &dt
->end
);
1803 gfc_error ("END tag at %C not allowed in output statement");
1806 dt
->end_where
= gfc_current_locus
;
1811 m
= match_ltag (&tag_eor
, &dt
->eor
);
1813 dt
->eor_where
= gfc_current_locus
;
1821 /* Free a data transfer structure and everything below it. */
1824 gfc_free_dt (gfc_dt
* dt
)
1830 gfc_free_expr (dt
->io_unit
);
1831 gfc_free_expr (dt
->format_expr
);
1832 gfc_free_expr (dt
->rec
);
1833 gfc_free_expr (dt
->advance
);
1834 gfc_free_expr (dt
->iomsg
);
1835 gfc_free_expr (dt
->iostat
);
1836 gfc_free_expr (dt
->size
);
1842 /* Resolve everything in a gfc_dt structure. */
1845 gfc_resolve_dt (gfc_dt
* dt
)
1849 RESOLVE_TAG (&tag_format
, dt
->format_expr
);
1850 RESOLVE_TAG (&tag_rec
, dt
->rec
);
1851 RESOLVE_TAG (&tag_advance
, dt
->advance
);
1852 RESOLVE_TAG (&tag_iomsg
, dt
->iomsg
);
1853 RESOLVE_TAG (&tag_iostat
, dt
->iostat
);
1854 RESOLVE_TAG (&tag_size
, dt
->size
);
1857 if (gfc_resolve_expr (e
) == SUCCESS
1858 && (e
->ts
.type
!= BT_INTEGER
1859 && (e
->ts
.type
!= BT_CHARACTER
1860 || e
->expr_type
!= EXPR_VARIABLE
)))
1863 ("UNIT specification at %L must be an INTEGER expression or a "
1864 "CHARACTER variable", &e
->where
);
1868 if (e
->ts
.type
== BT_CHARACTER
)
1870 if (gfc_has_vector_index (e
))
1872 gfc_error ("Internal unit with vector subscript at %L",
1878 if (e
->rank
&& e
->ts
.type
!= BT_CHARACTER
)
1880 gfc_error ("External IO UNIT cannot be an array at %L", &e
->where
);
1886 if (gfc_reference_st_label (dt
->err
, ST_LABEL_TARGET
) == FAILURE
)
1888 if (dt
->err
->defined
== ST_LABEL_UNKNOWN
)
1890 gfc_error ("ERR tag label %d at %L not defined",
1891 dt
->err
->value
, &dt
->err_where
);
1898 if (gfc_reference_st_label (dt
->end
, ST_LABEL_TARGET
) == FAILURE
)
1900 if (dt
->end
->defined
== ST_LABEL_UNKNOWN
)
1902 gfc_error ("END tag label %d at %L not defined",
1903 dt
->end
->value
, &dt
->end_where
);
1910 if (gfc_reference_st_label (dt
->eor
, ST_LABEL_TARGET
) == FAILURE
)
1912 if (dt
->eor
->defined
== ST_LABEL_UNKNOWN
)
1914 gfc_error ("EOR tag label %d at %L not defined",
1915 dt
->eor
->value
, &dt
->eor_where
);
1920 /* Check the format label actually exists. */
1921 if (dt
->format_label
&& dt
->format_label
!= &format_asterisk
1922 && dt
->format_label
->defined
== ST_LABEL_UNKNOWN
)
1924 gfc_error ("FORMAT label %d at %L not defined", dt
->format_label
->value
,
1925 &dt
->format_label
->where
);
1932 /* Given an io_kind, return its name. */
1935 io_kind_name (io_kind k
)
1954 gfc_internal_error ("io_kind_name(): bad I/O-kind");
1961 /* Match an IO iteration statement of the form:
1963 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
1965 which is equivalent to a single IO element. This function is
1966 mutually recursive with match_io_element(). */
1968 static match
match_io_element (io_kind k
, gfc_code
**);
1971 match_io_iterator (io_kind k
, gfc_code
** result
)
1973 gfc_code
*head
, *tail
, *new;
1981 old_loc
= gfc_current_locus
;
1983 if (gfc_match_char ('(') != MATCH_YES
)
1986 m
= match_io_element (k
, &head
);
1989 if (m
!= MATCH_YES
|| gfc_match_char (',') != MATCH_YES
)
1995 /* Can't be anything but an IO iterator. Build a list. */
1996 iter
= gfc_get_iterator ();
2000 m
= gfc_match_iterator (iter
, 0);
2001 if (m
== MATCH_ERROR
)
2005 gfc_check_do_variable (iter
->var
->symtree
);
2009 m
= match_io_element (k
, &new);
2010 if (m
== MATCH_ERROR
)
2019 tail
= gfc_append_code (tail
, new);
2021 if (gfc_match_char (',') != MATCH_YES
)
2030 if (gfc_match_char (')') != MATCH_YES
)
2033 new = gfc_get_code ();
2035 new->ext
.iterator
= iter
;
2037 new->block
= gfc_get_code ();
2038 new->block
->op
= EXEC_DO
;
2039 new->block
->next
= head
;
2045 gfc_error ("Syntax error in I/O iterator at %C");
2049 gfc_free_iterator (iter
, 1);
2050 gfc_free_statements (head
);
2051 gfc_current_locus
= old_loc
;
2056 /* Match a single element of an IO list, which is either a single
2057 expression or an IO Iterator. */
2060 match_io_element (io_kind k
, gfc_code
** cpp
)
2068 m
= match_io_iterator (k
, cpp
);
2074 m
= gfc_match_variable (&expr
, 0);
2076 gfc_error ("Expected variable in READ statement at %C");
2080 m
= gfc_match_expr (&expr
);
2082 gfc_error ("Expected expression in %s statement at %C",
2090 if (expr
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
2093 ("Variable '%s' in input list at %C cannot be INTENT(IN)",
2094 expr
->symtree
->n
.sym
->name
);
2099 && gfc_impure_variable (expr
->symtree
->n
.sym
)
2100 && current_dt
->io_unit
->ts
.type
== BT_CHARACTER
)
2102 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2103 expr
->symtree
->n
.sym
->name
);
2107 if (gfc_check_do_variable (expr
->symtree
))
2113 if (current_dt
->io_unit
->ts
.type
== BT_CHARACTER
2115 && current_dt
->io_unit
->expr_type
== EXPR_VARIABLE
2116 && gfc_impure_variable (current_dt
->io_unit
->symtree
->n
.sym
))
2119 ("Cannot write to internal file unit '%s' at %C inside a "
2120 "PURE procedure", current_dt
->io_unit
->symtree
->n
.sym
->name
);
2132 gfc_free_expr (expr
);
2136 cp
= gfc_get_code ();
2137 cp
->op
= EXEC_TRANSFER
;
2145 /* Match an I/O list, building gfc_code structures as we go. */
2148 match_io_list (io_kind k
, gfc_code
** head_p
)
2150 gfc_code
*head
, *tail
, *new;
2153 *head_p
= head
= tail
= NULL
;
2154 if (gfc_match_eos () == MATCH_YES
)
2159 m
= match_io_element (k
, &new);
2160 if (m
== MATCH_ERROR
)
2165 tail
= gfc_append_code (tail
, new);
2169 if (gfc_match_eos () == MATCH_YES
)
2171 if (gfc_match_char (',') != MATCH_YES
)
2179 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k
));
2182 gfc_free_statements (head
);
2187 /* Attach the data transfer end node. */
2190 terminate_io (gfc_code
* io_code
)
2194 if (io_code
== NULL
)
2195 io_code
= new_st
.block
;
2197 c
= gfc_get_code ();
2198 c
->op
= EXEC_DT_END
;
2200 /* Point to structure that is already there */
2201 c
->ext
.dt
= new_st
.ext
.dt
;
2202 gfc_append_code (io_code
, c
);
2206 /* Check the constraints for a data transfer statement. The majority of the
2207 constraints appearing in 9.4 of the standard appear here. Some are handled
2208 in resolve_tag and others in gfc_resolve_dt. */
2211 check_io_constraints (io_kind k
, gfc_dt
*dt
, gfc_code
* io_code
, locus
* spec_end
)
2213 #define io_constraint(condition,msg,arg)\
2216 gfc_error(msg,arg);\
2222 gfc_symbol
* sym
= NULL
;
2227 if (expr
&& expr
->expr_type
== EXPR_VARIABLE
2228 && expr
->ts
.type
== BT_CHARACTER
)
2230 sym
= expr
->symtree
->n
.sym
;
2232 io_constraint (k
== M_WRITE
&& sym
->attr
.intent
== INTENT_IN
,
2233 "Internal file at %L must not be INTENT(IN)",
2236 io_constraint (gfc_has_vector_index (dt
->io_unit
),
2237 "Internal file incompatible with vector subscript at %L",
2240 io_constraint (dt
->rec
!= NULL
,
2241 "REC tag at %L is incompatible with internal file",
2244 io_constraint (dt
->namelist
!= NULL
,
2245 "Internal file at %L is incompatible with namelist",
2248 io_constraint (dt
->advance
!= NULL
,
2249 "ADVANCE tag at %L is incompatible with internal file",
2250 &dt
->advance
->where
);
2253 if (expr
&& expr
->ts
.type
!= BT_CHARACTER
)
2256 io_constraint (gfc_pure (NULL
)
2257 && (k
== M_READ
|| k
== M_WRITE
),
2258 "IO UNIT in %s statement at %C must be "
2259 "an internal file in a PURE procedure",
2266 io_constraint (dt
->end
,
2267 "END tag not allowed with output at %L",
2270 io_constraint (dt
->eor
,
2271 "EOR tag not allowed with output at %L",
2274 io_constraint (k
!= M_READ
&& dt
->size
,
2275 "SIZE=specifier not allowed with output at %L",
2280 io_constraint (dt
->size
&& dt
->advance
== NULL
,
2281 "SIZE tag at %L requires an ADVANCE tag",
2284 io_constraint (dt
->eor
&& dt
->advance
== NULL
,
2285 "EOR tag at %L requires an ADVANCE tag",
2293 io_constraint (io_code
&& dt
->namelist
,
2294 "NAMELIST cannot be followed by IO-list at %L",
2297 io_constraint (dt
->format_expr
,
2298 "IO spec-list cannot contain both NAMELIST group name "
2299 "and format specification at %L.",
2300 &dt
->format_expr
->where
);
2302 io_constraint (dt
->format_label
,
2303 "IO spec-list cannot contain both NAMELIST group name "
2304 "and format label at %L", spec_end
);
2306 io_constraint (dt
->rec
,
2307 "NAMELIST IO is not allowed with a REC=specifier "
2308 "at %L.", &dt
->rec
->where
);
2310 io_constraint (dt
->advance
,
2311 "NAMELIST IO is not allowed with a ADVANCE=specifier "
2312 "at %L.", &dt
->advance
->where
);
2317 io_constraint (dt
->end
,
2318 "An END tag is not allowed with a "
2319 "REC=specifier at %L.", &dt
->end_where
);
2322 io_constraint (dt
->format_label
== &format_asterisk
,
2323 "FMT=* is not allowed with a REC=specifier "
2324 "at %L.", spec_end
);
2329 int not_yes
, not_no
;
2332 io_constraint (dt
->format_label
== &format_asterisk
,
2333 "List directed format(*) is not allowed with a "
2334 "ADVANCE=specifier at %L.", &expr
->where
);
2336 if (expr
->expr_type
== EXPR_CONSTANT
&& expr
->ts
.type
== BT_CHARACTER
)
2338 const char * advance
= expr
->value
.character
.string
;
2339 not_no
= strncasecmp (advance
, "no", 2) != 0;
2340 not_yes
= strncasecmp (advance
, "yes", 2) != 0;
2348 io_constraint (not_no
&& not_yes
,
2349 "ADVANCE=specifier at %L must have value = "
2350 "YES or NO.", &expr
->where
);
2352 io_constraint (dt
->size
&& not_no
&& k
== M_READ
,
2353 "SIZE tag at %L requires an ADVANCE = 'NO'",
2356 io_constraint (dt
->eor
&& not_no
&& k
== M_READ
,
2357 "EOR tag at %L requires an ADVANCE = 'NO'",
2361 expr
= dt
->format_expr
;
2362 if (expr
!= NULL
&& expr
->expr_type
== EXPR_CONSTANT
)
2363 check_format_string (expr
);
2367 #undef io_constraint
2369 /* Match a READ, WRITE or PRINT statement. */
2372 match_io (io_kind k
)
2374 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2383 where
= gfc_current_locus
;
2385 current_dt
= dt
= gfc_getmem (sizeof (gfc_dt
));
2386 if (gfc_match_char ('(') == MATCH_NO
)
2388 where
= gfc_current_locus
;
2391 else if (k
== M_PRINT
)
2393 /* Treat the non-standard case of PRINT namelist. */
2394 if ((gfc_current_form
== FORM_FIXED
|| gfc_peek_char () == ' ')
2395 && gfc_match_name (name
) == MATCH_YES
)
2397 gfc_find_symbol (name
, NULL
, 1, &sym
);
2398 if (sym
&& sym
->attr
.flavor
== FL_NAMELIST
)
2400 if (gfc_notify_std (GFC_STD_GNU
, "PRINT namelist at "
2401 "%C is an extension") == FAILURE
)
2407 dt
->io_unit
= default_unit (k
);
2412 gfc_current_locus
= where
;
2416 if (gfc_current_form
== FORM_FREE
)
2418 c
= gfc_peek_char();
2419 if (c
!= ' ' && c
!= '*' && c
!= '\'' && c
!= '"')
2426 m
= match_dt_format (dt
);
2427 if (m
== MATCH_ERROR
)
2433 dt
->io_unit
= default_unit (k
);
2438 /* Error for constructs like print (1,*). */
2443 /* Match a control list */
2444 if (match_dt_element (k
, dt
) == MATCH_YES
)
2446 if (match_dt_unit (k
, dt
) != MATCH_YES
)
2449 if (gfc_match_char (')') == MATCH_YES
)
2451 if (gfc_match_char (',') != MATCH_YES
)
2454 m
= match_dt_element (k
, dt
);
2457 if (m
== MATCH_ERROR
)
2460 m
= match_dt_format (dt
);
2463 if (m
== MATCH_ERROR
)
2466 where
= gfc_current_locus
;
2468 m
= gfc_match_name (name
);
2471 gfc_find_symbol (name
, NULL
, 1, &sym
);
2472 if (sym
&& sym
->attr
.flavor
== FL_NAMELIST
)
2475 if (k
== M_READ
&& check_namelist (sym
))
2484 gfc_current_locus
= where
;
2486 goto loop
; /* No matches, try regular elements */
2489 if (gfc_match_char (')') == MATCH_YES
)
2491 if (gfc_match_char (',') != MATCH_YES
)
2497 m
= match_dt_element (k
, dt
);
2500 if (m
== MATCH_ERROR
)
2503 if (gfc_match_char (')') == MATCH_YES
)
2505 if (gfc_match_char (',') != MATCH_YES
)
2511 /* Used in check_io_constraints, where no locus is available. */
2512 spec_end
= gfc_current_locus
;
2514 /* Optional leading comma (non-standard). */
2516 && gfc_match_char (',') == MATCH_YES
2518 && gfc_notify_std (GFC_STD_GNU
, "Extension: Comma before output "
2519 "item list at %C is an extension") == FAILURE
)
2523 if (gfc_match_eos () != MATCH_YES
)
2525 if (comma_flag
&& gfc_match_char (',') != MATCH_YES
)
2527 gfc_error ("Expected comma in I/O list at %C");
2532 m
= match_io_list (k
, &io_code
);
2533 if (m
== MATCH_ERROR
)
2539 /* A full IO statement has been matched. Check the constraints. spec_end is
2540 supplied for cases where no locus is supplied. */
2541 m
= check_io_constraints (k
, dt
, io_code
, &spec_end
);
2543 if (m
== MATCH_ERROR
)
2546 new_st
.op
= (k
== M_READ
) ? EXEC_READ
: EXEC_WRITE
;
2548 new_st
.block
= gfc_get_code ();
2549 new_st
.block
->op
= new_st
.op
;
2550 new_st
.block
->next
= io_code
;
2552 terminate_io (io_code
);
2557 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k
));
2567 gfc_match_read (void)
2569 return match_io (M_READ
);
2573 gfc_match_write (void)
2575 return match_io (M_WRITE
);
2579 gfc_match_print (void)
2583 m
= match_io (M_PRINT
);
2587 if (gfc_pure (NULL
))
2589 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
2597 /* Free a gfc_inquire structure. */
2600 gfc_free_inquire (gfc_inquire
* inquire
)
2603 if (inquire
== NULL
)
2606 gfc_free_expr (inquire
->unit
);
2607 gfc_free_expr (inquire
->file
);
2608 gfc_free_expr (inquire
->iomsg
);
2609 gfc_free_expr (inquire
->iostat
);
2610 gfc_free_expr (inquire
->exist
);
2611 gfc_free_expr (inquire
->opened
);
2612 gfc_free_expr (inquire
->number
);
2613 gfc_free_expr (inquire
->named
);
2614 gfc_free_expr (inquire
->name
);
2615 gfc_free_expr (inquire
->access
);
2616 gfc_free_expr (inquire
->sequential
);
2617 gfc_free_expr (inquire
->direct
);
2618 gfc_free_expr (inquire
->form
);
2619 gfc_free_expr (inquire
->formatted
);
2620 gfc_free_expr (inquire
->unformatted
);
2621 gfc_free_expr (inquire
->recl
);
2622 gfc_free_expr (inquire
->nextrec
);
2623 gfc_free_expr (inquire
->blank
);
2624 gfc_free_expr (inquire
->position
);
2625 gfc_free_expr (inquire
->action
);
2626 gfc_free_expr (inquire
->read
);
2627 gfc_free_expr (inquire
->write
);
2628 gfc_free_expr (inquire
->readwrite
);
2629 gfc_free_expr (inquire
->delim
);
2630 gfc_free_expr (inquire
->pad
);
2631 gfc_free_expr (inquire
->iolength
);
2632 gfc_free_expr (inquire
->convert
);
2638 /* Match an element of an INQUIRE statement. */
2640 #define RETM if (m != MATCH_NO) return m;
2643 match_inquire_element (gfc_inquire
* inquire
)
2647 m
= match_etag (&tag_unit
, &inquire
->unit
);
2648 RETM m
= match_etag (&tag_file
, &inquire
->file
);
2649 RETM m
= match_ltag (&tag_err
, &inquire
->err
);
2650 RETM m
= match_out_tag (&tag_iomsg
, &inquire
->iomsg
);
2651 RETM m
= match_out_tag (&tag_iostat
, &inquire
->iostat
);
2652 RETM m
= match_vtag (&tag_exist
, &inquire
->exist
);
2653 RETM m
= match_vtag (&tag_opened
, &inquire
->opened
);
2654 RETM m
= match_vtag (&tag_named
, &inquire
->named
);
2655 RETM m
= match_vtag (&tag_name
, &inquire
->name
);
2656 RETM m
= match_out_tag (&tag_number
, &inquire
->number
);
2657 RETM m
= match_vtag (&tag_s_access
, &inquire
->access
);
2658 RETM m
= match_vtag (&tag_sequential
, &inquire
->sequential
);
2659 RETM m
= match_vtag (&tag_direct
, &inquire
->direct
);
2660 RETM m
= match_vtag (&tag_s_form
, &inquire
->form
);
2661 RETM m
= match_vtag (&tag_formatted
, &inquire
->formatted
);
2662 RETM m
= match_vtag (&tag_unformatted
, &inquire
->unformatted
);
2663 RETM m
= match_out_tag (&tag_s_recl
, &inquire
->recl
);
2664 RETM m
= match_out_tag (&tag_nextrec
, &inquire
->nextrec
);
2665 RETM m
= match_vtag (&tag_s_blank
, &inquire
->blank
);
2666 RETM m
= match_vtag (&tag_s_position
, &inquire
->position
);
2667 RETM m
= match_vtag (&tag_s_action
, &inquire
->action
);
2668 RETM m
= match_vtag (&tag_read
, &inquire
->read
);
2669 RETM m
= match_vtag (&tag_write
, &inquire
->write
);
2670 RETM m
= match_vtag (&tag_readwrite
, &inquire
->readwrite
);
2671 RETM m
= match_vtag (&tag_s_delim
, &inquire
->delim
);
2672 RETM m
= match_vtag (&tag_s_pad
, &inquire
->pad
);
2673 RETM m
= match_vtag (&tag_iolength
, &inquire
->iolength
);
2674 RETM m
= match_vtag (&tag_convert
, &inquire
->convert
);
2675 RETM
return MATCH_NO
;
2682 gfc_match_inquire (void)
2684 gfc_inquire
*inquire
;
2689 m
= gfc_match_char ('(');
2693 inquire
= gfc_getmem (sizeof (gfc_inquire
));
2695 loc
= gfc_current_locus
;
2697 m
= match_inquire_element (inquire
);
2698 if (m
== MATCH_ERROR
)
2702 m
= gfc_match_expr (&inquire
->unit
);
2703 if (m
== MATCH_ERROR
)
2709 /* See if we have the IOLENGTH form of the inquire statement. */
2710 if (inquire
->iolength
!= NULL
)
2712 if (gfc_match_char (')') != MATCH_YES
)
2715 m
= match_io_list (M_INQUIRE
, &code
);
2716 if (m
== MATCH_ERROR
)
2721 new_st
.op
= EXEC_IOLENGTH
;
2722 new_st
.expr
= inquire
->iolength
;
2723 new_st
.ext
.inquire
= inquire
;
2725 if (gfc_pure (NULL
))
2727 gfc_free_statements (code
);
2728 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
2732 new_st
.block
= gfc_get_code ();
2733 new_st
.block
->op
= EXEC_IOLENGTH
;
2734 terminate_io (code
);
2735 new_st
.block
->next
= code
;
2739 /* At this point, we have the non-IOLENGTH inquire statement. */
2742 if (gfc_match_char (')') == MATCH_YES
)
2744 if (gfc_match_char (',') != MATCH_YES
)
2747 m
= match_inquire_element (inquire
);
2748 if (m
== MATCH_ERROR
)
2753 if (inquire
->iolength
!= NULL
)
2755 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
2760 if (gfc_match_eos () != MATCH_YES
)
2763 if (inquire
->unit
!= NULL
&& inquire
->file
!= NULL
)
2765 gfc_error ("INQUIRE statement at %L cannot contain both FILE and"
2766 " UNIT specifiers", &loc
);
2770 if (inquire
->unit
== NULL
&& inquire
->file
== NULL
)
2772 gfc_error ("INQUIRE statement at %L requires either FILE or"
2773 " UNIT specifier", &loc
);
2777 if (gfc_pure (NULL
))
2779 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
2783 new_st
.op
= EXEC_INQUIRE
;
2784 new_st
.ext
.inquire
= inquire
;
2788 gfc_syntax_error (ST_INQUIRE
);
2791 gfc_free_inquire (inquire
);
2796 /* Resolve everything in a gfc_inquire structure. */
2799 gfc_resolve_inquire (gfc_inquire
* inquire
)
2802 RESOLVE_TAG (&tag_unit
, inquire
->unit
);
2803 RESOLVE_TAG (&tag_file
, inquire
->file
);
2804 RESOLVE_TAG (&tag_iomsg
, inquire
->iomsg
);
2805 RESOLVE_TAG (&tag_iostat
, inquire
->iostat
);
2806 RESOLVE_TAG (&tag_exist
, inquire
->exist
);
2807 RESOLVE_TAG (&tag_opened
, inquire
->opened
);
2808 RESOLVE_TAG (&tag_number
, inquire
->number
);
2809 RESOLVE_TAG (&tag_named
, inquire
->named
);
2810 RESOLVE_TAG (&tag_name
, inquire
->name
);
2811 RESOLVE_TAG (&tag_s_access
, inquire
->access
);
2812 RESOLVE_TAG (&tag_sequential
, inquire
->sequential
);
2813 RESOLVE_TAG (&tag_direct
, inquire
->direct
);
2814 RESOLVE_TAG (&tag_s_form
, inquire
->form
);
2815 RESOLVE_TAG (&tag_formatted
, inquire
->formatted
);
2816 RESOLVE_TAG (&tag_unformatted
, inquire
->unformatted
);
2817 RESOLVE_TAG (&tag_s_recl
, inquire
->recl
);
2818 RESOLVE_TAG (&tag_nextrec
, inquire
->nextrec
);
2819 RESOLVE_TAG (&tag_s_blank
, inquire
->blank
);
2820 RESOLVE_TAG (&tag_s_position
, inquire
->position
);
2821 RESOLVE_TAG (&tag_s_action
, inquire
->action
);
2822 RESOLVE_TAG (&tag_read
, inquire
->read
);
2823 RESOLVE_TAG (&tag_write
, inquire
->write
);
2824 RESOLVE_TAG (&tag_readwrite
, inquire
->readwrite
);
2825 RESOLVE_TAG (&tag_s_delim
, inquire
->delim
);
2826 RESOLVE_TAG (&tag_s_pad
, inquire
->pad
);
2827 RESOLVE_TAG (&tag_iolength
, inquire
->iolength
);
2828 RESOLVE_TAG (&tag_convert
, inquire
->convert
);
2830 if (gfc_reference_st_label (inquire
->err
, ST_LABEL_TARGET
) == FAILURE
)