1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation,
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 { -1, ST_LABEL_FORMAT
, ST_LABEL_FORMAT
, NULL
, 0,
32 {NULL
, NULL
}, NULL
, 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 static int value
= 0;
159 /* Simple lexical analyzer for getting the next token in a FORMAT
170 if (saved_token
!= FMT_NONE
)
173 saved_token
= FMT_NONE
;
181 while (gfc_is_whitespace (c
));
202 value
= 10 * value
+ c
- '0';
211 token
= FMT_SIGNED_INT
;
234 value
= 10 * value
+ c
- '0';
236 while (ISDIGIT (c
) || gfc_is_whitespace(c
));
239 token
= zflag
? FMT_ZERO
: FMT_POSINT
;
264 if (c
!= 'L' && c
!= 'R')
284 if (c
!= 'P' && c
!= 'S')
292 if (c
== 'N' || c
== 'Z')
354 if (c
== 'N' || c
== 'S')
397 /* Check a format statement. The format string, either from a FORMAT
398 statement or a constant in an I/O statement has already been parsed
399 by itself, and we are checking it for validity. The dual origin
400 means that the warning message is a little less than great. */
405 const char *posint_required
= _("Positive width required");
406 const char *period_required
= _("Period required");
407 const char *nonneg_required
= _("Nonnegative width required");
408 const char *unexpected_element
= _("Unexpected element");
409 const char *unexpected_end
= _("Unexpected end of format string");
418 saved_token
= FMT_NONE
;
426 error
= _("Missing leading left parenthesis");
432 goto finished
; /* Empty format is legal */
436 /* In this state, the next thing has to be a format item. */
460 /* Signed integer can only precede a P format. */
464 error
= _("Expected P edit descriptor");
471 /* P requires a prior number. */
472 error
= _("P descriptor requires leading scale factor");
476 /* X requires a prior number if we're being pedantic. */
477 if (gfc_notify_std (GFC_STD_GNU
, "Extension: X descriptor "
478 "requires leading space count at %C")
488 goto extension_optional_comma
;
497 if (gfc_notify_std (GFC_STD_GNU
, "Extension: $ descriptor at %C")
500 if (t
!= FMT_RPAREN
|| level
> 0)
502 error
= _("$ must be the last specifier");
523 error
= unexpected_end
;
527 error
= unexpected_element
;
532 /* In this state, t must currently be a data descriptor.
533 Deal with things that can/must follow the descriptor. */
547 error
= _("Repeat count cannot follow P descriptor");
562 error
= posint_required
;
578 error
= posint_required
;
585 error
= period_required
;
590 if (u
!= FMT_ZERO
&& u
!= FMT_POSINT
)
592 error
= nonneg_required
;
599 /* Look for optional exponent. */
610 error
= _("Positive exponent width required");
619 if (t
!= FMT_ZERO
&& t
!= FMT_POSINT
)
621 error
= nonneg_required
;
628 error
= period_required
;
633 if (t
!= FMT_ZERO
&& t
!= FMT_POSINT
)
635 error
= nonneg_required
;
642 if(mode
== MODE_STRING
)
644 format_string
+= value
;
645 format_length
-= value
;
659 if (t
!= FMT_ZERO
&& t
!= FMT_POSINT
)
661 error
= nonneg_required
;
673 if (t
!= FMT_ZERO
&& t
!= FMT_POSINT
)
675 error
= nonneg_required
;
683 error
= unexpected_element
;
688 /* Between a descriptor and what comes next. */
707 error
= unexpected_end
;
711 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Missing comma at %C")
718 /* Optional comma is a weird between state where we've just finished
719 reading a colon, slash or P descriptor. */
733 /* Assume that we have another format item. */
740 extension_optional_comma
:
741 /* As a GNU extension, permit a missing comma after a string literal. */
759 error
= unexpected_end
;
763 if (gfc_notify_std (GFC_STD_GNU
, "Extension: Missing comma at %C")
773 /* Something went wrong. If the format we're checking is a string,
774 generate a warning, since the program is correct. If the format
775 is in a FORMAT statement, this messes up parsing, which is an
777 if (mode
!= MODE_STRING
)
778 gfc_error ("%s in format string at %C", error
);
781 gfc_warning ("%s in format string at %C", error
);
783 /* TODO: More elaborate measures are needed to show where a problem
784 is within a format string that has been calculated. */
794 /* Given an expression node that is a constant string, see if it looks
795 like a format string. */
798 check_format_string (gfc_expr
* e
)
802 format_string
= e
->value
.character
.string
;
807 /************ Fortran 95 I/O statement matchers *************/
809 /* Match a FORMAT statement. This amounts to actually parsing the
810 format descriptors in order to correctly locate the end of the
814 gfc_match_format (void)
819 if (gfc_current_ns
->proc_name
820 && gfc_current_ns
->proc_name
->attr
.flavor
== FL_MODULE
)
822 gfc_error ("Format statement in module main block at %C.");
826 if (gfc_statement_label
== NULL
)
828 gfc_error ("Missing format label at %C");
831 gfc_gobble_whitespace ();
836 start
= gfc_current_locus
;
838 if (check_format () == FAILURE
)
841 if (gfc_match_eos () != MATCH_YES
)
843 gfc_syntax_error (ST_FORMAT
);
847 /* The label doesn't get created until after the statement is done
848 being matched, so we have to leave the string for later. */
850 gfc_current_locus
= start
; /* Back to the beginning */
853 new_st
.op
= EXEC_NOP
;
856 e
->expr_type
= EXPR_CONSTANT
;
857 e
->ts
.type
= BT_CHARACTER
;
858 e
->ts
.kind
= gfc_default_character_kind
;
860 e
->value
.character
.string
= format_string
= gfc_getmem(format_length
+1);
861 e
->value
.character
.length
= format_length
;
862 gfc_statement_label
->format
= e
;
865 check_format (); /* Guaranteed to succeed */
866 gfc_match_eos (); /* Guaranteed to succeed */
872 /* Match an expression I/O tag of some sort. */
875 match_etag (const io_tag
* tag
, gfc_expr
** v
)
880 m
= gfc_match (tag
->spec
, &result
);
886 gfc_error ("Duplicate %s specification at %C", tag
->name
);
887 gfc_free_expr (result
);
896 /* Match a variable I/O tag of some sort. */
899 match_vtag (const io_tag
* tag
, gfc_expr
** v
)
904 m
= gfc_match (tag
->spec
, &result
);
910 gfc_error ("Duplicate %s specification at %C", tag
->name
);
911 gfc_free_expr (result
);
915 if (result
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
917 gfc_error ("Variable tag cannot be INTENT(IN) at %C");
918 gfc_free_expr (result
);
922 if (gfc_pure (NULL
) && gfc_impure_variable (result
->symtree
->n
.sym
))
924 gfc_error ("Variable tag cannot be assigned in PURE procedure at %C");
925 gfc_free_expr (result
);
934 /* Match I/O tags that cause variables to become redefined. */
937 match_out_tag(const io_tag
*tag
, gfc_expr
**result
)
941 m
= match_vtag(tag
, result
);
943 gfc_check_do_variable((*result
)->symtree
);
949 /* Match a label I/O tag. */
952 match_ltag (const io_tag
* tag
, gfc_st_label
** label
)
958 m
= gfc_match (tag
->spec
, label
);
959 if (m
== MATCH_YES
&& old
!= 0)
961 gfc_error ("Duplicate %s label specification at %C", tag
->name
);
969 /* Do expression resolution and type-checking on an expression tag. */
972 resolve_tag (const io_tag
* tag
, gfc_expr
* e
)
978 if (gfc_resolve_expr (e
) == FAILURE
)
981 if (e
->ts
.type
!= tag
->type
&& tag
!= &tag_format
)
983 gfc_error ("%s tag at %L must be of type %s", tag
->name
,
984 &e
->where
, gfc_basic_typename (tag
->type
));
988 if (tag
== &tag_format
)
990 if (e
->expr_type
== EXPR_CONSTANT
991 && (e
->ts
.type
!= BT_CHARACTER
992 || e
->ts
.kind
!= gfc_default_character_kind
))
994 gfc_error ("Constant expression in FORMAT tag at %L must be "
995 "of type default CHARACTER", &e
->where
);
999 /* If e's rank is zero and e is not an element of an array, it should be
1000 of integer or character type. The integer variable should be
1002 if (e
->symtree
== NULL
|| e
->symtree
->n
.sym
->as
== NULL
1003 || e
->symtree
->n
.sym
->as
->rank
== 0)
1005 if (e
->ts
.type
!= BT_CHARACTER
&& e
->ts
.type
!= BT_INTEGER
)
1007 gfc_error ("%s tag at %L must be of type %s or %s", tag
->name
,
1008 &e
->where
, gfc_basic_typename (BT_CHARACTER
),
1009 gfc_basic_typename (BT_INTEGER
));
1012 else if (e
->ts
.type
== BT_INTEGER
&& e
->expr_type
== EXPR_VARIABLE
)
1014 if (gfc_notify_std (GFC_STD_F95_DEL
,
1015 "Obsolete: ASSIGNED variable in FORMAT tag at %L",
1016 &e
->where
) == FAILURE
)
1018 if (e
->symtree
->n
.sym
->attr
.assign
!= 1)
1020 gfc_error ("Variable '%s' at %L has not been assigned a "
1021 "format label", e
->symtree
->n
.sym
->name
, &e
->where
);
1029 /* if rank is nonzero, we allow the type to be character under
1030 GFC_STD_GNU and other type under GFC_STD_LEGACY. It may be
1031 assigned an Hollerith constant. */
1032 if (e
->ts
.type
== BT_CHARACTER
)
1034 if (gfc_notify_std (GFC_STD_GNU
,
1035 "Extension: Character array in FORMAT tag at %L",
1036 &e
->where
) == FAILURE
)
1041 if (gfc_notify_std (GFC_STD_LEGACY
,
1042 "Extension: Non-character in FORMAT tag at %L",
1043 &e
->where
) == FAILURE
)
1053 gfc_error ("%s tag at %L must be scalar", tag
->name
, &e
->where
);
1057 if (tag
== &tag_iomsg
)
1059 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: IOMSG tag at %L",
1060 &e
->where
) == FAILURE
)
1064 if (tag
== &tag_iostat
&& e
->ts
.kind
!= gfc_default_integer_kind
)
1066 if (gfc_notify_std (GFC_STD_GNU
, "Fortran 95 requires default "
1067 "INTEGER in IOSTAT tag at %L",
1068 &e
->where
) == FAILURE
)
1072 if (tag
== &tag_size
&& e
->ts
.kind
!= gfc_default_integer_kind
)
1074 if (gfc_notify_std (GFC_STD_GNU
, "Fortran 95 requires default "
1075 "INTEGER in SIZE tag at %L",
1076 &e
->where
) == FAILURE
)
1080 if (tag
== &tag_convert
)
1082 if (gfc_notify_std (GFC_STD_GNU
, "Extension: CONVERT tag at %L",
1083 &e
->where
) == FAILURE
)
1092 /* Match a single tag of an OPEN statement. */
1095 match_open_element (gfc_open
* open
)
1099 m
= match_etag (&tag_unit
, &open
->unit
);
1102 m
= match_out_tag (&tag_iomsg
, &open
->iomsg
);
1105 m
= match_out_tag (&tag_iostat
, &open
->iostat
);
1108 m
= match_etag (&tag_file
, &open
->file
);
1111 m
= match_etag (&tag_status
, &open
->status
);
1114 m
= match_etag (&tag_e_access
, &open
->access
);
1117 m
= match_etag (&tag_e_form
, &open
->form
);
1120 m
= match_etag (&tag_e_recl
, &open
->recl
);
1123 m
= match_etag (&tag_e_blank
, &open
->blank
);
1126 m
= match_etag (&tag_e_position
, &open
->position
);
1129 m
= match_etag (&tag_e_action
, &open
->action
);
1132 m
= match_etag (&tag_e_delim
, &open
->delim
);
1135 m
= match_etag (&tag_e_pad
, &open
->pad
);
1138 m
= match_ltag (&tag_err
, &open
->err
);
1141 m
= match_etag (&tag_convert
, &open
->convert
);
1149 /* Free the gfc_open structure and all the expressions it contains. */
1152 gfc_free_open (gfc_open
* open
)
1158 gfc_free_expr (open
->unit
);
1159 gfc_free_expr (open
->iomsg
);
1160 gfc_free_expr (open
->iostat
);
1161 gfc_free_expr (open
->file
);
1162 gfc_free_expr (open
->status
);
1163 gfc_free_expr (open
->access
);
1164 gfc_free_expr (open
->form
);
1165 gfc_free_expr (open
->recl
);
1166 gfc_free_expr (open
->blank
);
1167 gfc_free_expr (open
->position
);
1168 gfc_free_expr (open
->action
);
1169 gfc_free_expr (open
->delim
);
1170 gfc_free_expr (open
->pad
);
1171 gfc_free_expr (open
->convert
);
1177 /* Resolve everything in a gfc_open structure. */
1180 gfc_resolve_open (gfc_open
* open
)
1183 RESOLVE_TAG (&tag_unit
, open
->unit
);
1184 RESOLVE_TAG (&tag_iomsg
, open
->iomsg
);
1185 RESOLVE_TAG (&tag_iostat
, open
->iostat
);
1186 RESOLVE_TAG (&tag_file
, open
->file
);
1187 RESOLVE_TAG (&tag_status
, open
->status
);
1188 RESOLVE_TAG (&tag_e_access
, open
->access
);
1189 RESOLVE_TAG (&tag_e_form
, open
->form
);
1190 RESOLVE_TAG (&tag_e_recl
, open
->recl
);
1192 RESOLVE_TAG (&tag_e_blank
, open
->blank
);
1193 RESOLVE_TAG (&tag_e_position
, open
->position
);
1194 RESOLVE_TAG (&tag_e_action
, open
->action
);
1195 RESOLVE_TAG (&tag_e_delim
, open
->delim
);
1196 RESOLVE_TAG (&tag_e_pad
, open
->pad
);
1197 RESOLVE_TAG (&tag_convert
, open
->convert
);
1199 if (gfc_reference_st_label (open
->err
, ST_LABEL_TARGET
) == FAILURE
)
1206 /* Match an OPEN statement. */
1209 gfc_match_open (void)
1214 m
= gfc_match_char ('(');
1218 open
= gfc_getmem (sizeof (gfc_open
));
1220 m
= match_open_element (open
);
1222 if (m
== MATCH_ERROR
)
1226 m
= gfc_match_expr (&open
->unit
);
1229 if (m
== MATCH_ERROR
)
1235 if (gfc_match_char (')') == MATCH_YES
)
1237 if (gfc_match_char (',') != MATCH_YES
)
1240 m
= match_open_element (open
);
1241 if (m
== MATCH_ERROR
)
1247 if (gfc_match_eos () == MATCH_NO
)
1250 if (gfc_pure (NULL
))
1252 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1256 new_st
.op
= EXEC_OPEN
;
1257 new_st
.ext
.open
= open
;
1261 gfc_syntax_error (ST_OPEN
);
1264 gfc_free_open (open
);
1269 /* Free a gfc_close structure an all its expressions. */
1272 gfc_free_close (gfc_close
* close
)
1278 gfc_free_expr (close
->unit
);
1279 gfc_free_expr (close
->iomsg
);
1280 gfc_free_expr (close
->iostat
);
1281 gfc_free_expr (close
->status
);
1287 /* Match elements of a CLOSE statement. */
1290 match_close_element (gfc_close
* close
)
1294 m
= match_etag (&tag_unit
, &close
->unit
);
1297 m
= match_etag (&tag_status
, &close
->status
);
1300 m
= match_out_tag (&tag_iomsg
, &close
->iomsg
);
1303 m
= match_out_tag (&tag_iostat
, &close
->iostat
);
1306 m
= match_ltag (&tag_err
, &close
->err
);
1314 /* Match a CLOSE statement. */
1317 gfc_match_close (void)
1322 m
= gfc_match_char ('(');
1326 close
= gfc_getmem (sizeof (gfc_close
));
1328 m
= match_close_element (close
);
1330 if (m
== MATCH_ERROR
)
1334 m
= gfc_match_expr (&close
->unit
);
1337 if (m
== MATCH_ERROR
)
1343 if (gfc_match_char (')') == MATCH_YES
)
1345 if (gfc_match_char (',') != MATCH_YES
)
1348 m
= match_close_element (close
);
1349 if (m
== MATCH_ERROR
)
1355 if (gfc_match_eos () == MATCH_NO
)
1358 if (gfc_pure (NULL
))
1360 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
1364 new_st
.op
= EXEC_CLOSE
;
1365 new_st
.ext
.close
= close
;
1369 gfc_syntax_error (ST_CLOSE
);
1372 gfc_free_close (close
);
1377 /* Resolve everything in a gfc_close structure. */
1380 gfc_resolve_close (gfc_close
* close
)
1383 RESOLVE_TAG (&tag_unit
, close
->unit
);
1384 RESOLVE_TAG (&tag_iomsg
, close
->iomsg
);
1385 RESOLVE_TAG (&tag_iostat
, close
->iostat
);
1386 RESOLVE_TAG (&tag_status
, close
->status
);
1388 if (gfc_reference_st_label (close
->err
, ST_LABEL_TARGET
) == FAILURE
)
1395 /* Free a gfc_filepos structure. */
1398 gfc_free_filepos (gfc_filepos
* fp
)
1401 gfc_free_expr (fp
->unit
);
1402 gfc_free_expr (fp
->iomsg
);
1403 gfc_free_expr (fp
->iostat
);
1408 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
1411 match_file_element (gfc_filepos
* fp
)
1415 m
= match_etag (&tag_unit
, &fp
->unit
);
1418 m
= match_out_tag (&tag_iomsg
, &fp
->iomsg
);
1421 m
= match_out_tag (&tag_iostat
, &fp
->iostat
);
1424 m
= match_ltag (&tag_err
, &fp
->err
);
1432 /* Match the second half of the file-positioning statements, REWIND,
1433 BACKSPACE, ENDFILE, or the FLUSH statement. */
1436 match_filepos (gfc_statement st
, gfc_exec_op op
)
1441 fp
= gfc_getmem (sizeof (gfc_filepos
));
1443 if (gfc_match_char ('(') == MATCH_NO
)
1445 m
= gfc_match_expr (&fp
->unit
);
1446 if (m
== MATCH_ERROR
)
1454 m
= match_file_element (fp
);
1455 if (m
== MATCH_ERROR
)
1459 m
= gfc_match_expr (&fp
->unit
);
1460 if (m
== MATCH_ERROR
)
1468 if (gfc_match_char (')') == MATCH_YES
)
1470 if (gfc_match_char (',') != MATCH_YES
)
1473 m
= match_file_element (fp
);
1474 if (m
== MATCH_ERROR
)
1481 if (gfc_match_eos () != MATCH_YES
)
1484 if (gfc_pure (NULL
))
1486 gfc_error ("%s statement not allowed in PURE procedure at %C",
1487 gfc_ascii_statement (st
));
1493 new_st
.ext
.filepos
= fp
;
1497 gfc_syntax_error (st
);
1500 gfc_free_filepos (fp
);
1506 gfc_resolve_filepos (gfc_filepos
* fp
)
1509 RESOLVE_TAG (&tag_unit
, fp
->unit
);
1510 RESOLVE_TAG (&tag_iostat
, fp
->iostat
);
1511 RESOLVE_TAG (&tag_iomsg
, fp
->iomsg
);
1512 if (gfc_reference_st_label (fp
->err
, ST_LABEL_TARGET
) == FAILURE
)
1519 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
1520 and the FLUSH statement. */
1523 gfc_match_endfile (void)
1526 return match_filepos (ST_END_FILE
, EXEC_ENDFILE
);
1530 gfc_match_backspace (void)
1533 return match_filepos (ST_BACKSPACE
, EXEC_BACKSPACE
);
1537 gfc_match_rewind (void)
1540 return match_filepos (ST_REWIND
, EXEC_REWIND
);
1544 gfc_match_flush (void)
1546 if (gfc_notify_std (GFC_STD_F2003
, "Fortran 2003: FLUSH statement at %C") == FAILURE
)
1549 return match_filepos (ST_FLUSH
, EXEC_FLUSH
);
1552 /******************** Data Transfer Statements *********************/
1555 { M_READ
, M_WRITE
, M_PRINT
, M_INQUIRE
}
1559 /* Return a default unit number. */
1562 default_unit (io_kind k
)
1571 return gfc_int_expr (unit
);
1575 /* Match a unit specification for a data transfer statement. */
1578 match_dt_unit (io_kind k
, gfc_dt
* dt
)
1582 if (gfc_match_char ('*') == MATCH_YES
)
1584 if (dt
->io_unit
!= NULL
)
1587 dt
->io_unit
= default_unit (k
);
1591 if (gfc_match_expr (&e
) == MATCH_YES
)
1593 if (dt
->io_unit
!= NULL
)
1606 gfc_error ("Duplicate UNIT specification at %C");
1611 /* Match a format specification. */
1614 match_dt_format (gfc_dt
* dt
)
1618 gfc_st_label
*label
;
1620 where
= gfc_current_locus
;
1622 if (gfc_match_char ('*') == MATCH_YES
)
1624 if (dt
->format_expr
!= NULL
|| dt
->format_label
!= NULL
)
1627 dt
->format_label
= &format_asterisk
;
1631 if (gfc_match_st_label (&label
) == MATCH_YES
)
1633 if (dt
->format_expr
!= NULL
|| dt
->format_label
!= NULL
)
1635 gfc_free_st_label (label
);
1639 if (gfc_reference_st_label (label
, ST_LABEL_FORMAT
) == FAILURE
)
1642 dt
->format_label
= label
;
1646 if (gfc_match_expr (&e
) == MATCH_YES
)
1648 if (dt
->format_expr
!= NULL
|| dt
->format_label
!= NULL
)
1653 dt
->format_expr
= e
;
1657 gfc_current_locus
= where
; /* The only case where we have to restore */
1662 gfc_error ("Duplicate format specification at %C");
1667 /* Traverse a namelist that is part of a READ statement to make sure
1668 that none of the variables in the namelist are INTENT(IN). Returns
1669 nonzero if we find such a variable. */
1672 check_namelist (gfc_symbol
* sym
)
1676 for (p
= sym
->namelist
; p
; p
= p
->next
)
1677 if (p
->sym
->attr
.intent
== INTENT_IN
)
1679 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
1680 p
->sym
->name
, sym
->name
);
1688 /* Match a single data transfer element. */
1691 match_dt_element (io_kind k
, gfc_dt
* dt
)
1693 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
1697 if (gfc_match (" unit =") == MATCH_YES
)
1699 m
= match_dt_unit (k
, dt
);
1704 if (gfc_match (" fmt =") == MATCH_YES
)
1706 m
= match_dt_format (dt
);
1711 if (gfc_match (" nml = %n", name
) == MATCH_YES
)
1713 if (dt
->namelist
!= NULL
)
1715 gfc_error ("Duplicate NML specification at %C");
1719 if (gfc_find_symbol (name
, NULL
, 1, &sym
))
1722 if (sym
== NULL
|| sym
->attr
.flavor
!= FL_NAMELIST
)
1724 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
1725 sym
!= NULL
? sym
->name
: name
);
1730 if (k
== M_READ
&& check_namelist (sym
))
1736 m
= match_etag (&tag_rec
, &dt
->rec
);
1739 m
= match_out_tag (&tag_iomsg
, &dt
->iomsg
);
1742 m
= match_out_tag (&tag_iostat
, &dt
->iostat
);
1745 m
= match_ltag (&tag_err
, &dt
->err
);
1747 dt
->err_where
= gfc_current_locus
;
1750 m
= match_etag (&tag_advance
, &dt
->advance
);
1753 m
= match_out_tag (&tag_size
, &dt
->size
);
1757 m
= match_ltag (&tag_end
, &dt
->end
);
1762 gfc_error ("END tag at %C not allowed in output statement");
1765 dt
->end_where
= gfc_current_locus
;
1770 m
= match_ltag (&tag_eor
, &dt
->eor
);
1772 dt
->eor_where
= gfc_current_locus
;
1780 /* Free a data transfer structure and everything below it. */
1783 gfc_free_dt (gfc_dt
* dt
)
1789 gfc_free_expr (dt
->io_unit
);
1790 gfc_free_expr (dt
->format_expr
);
1791 gfc_free_expr (dt
->rec
);
1792 gfc_free_expr (dt
->advance
);
1793 gfc_free_expr (dt
->iomsg
);
1794 gfc_free_expr (dt
->iostat
);
1795 gfc_free_expr (dt
->size
);
1801 /* Resolve everything in a gfc_dt structure. */
1804 gfc_resolve_dt (gfc_dt
* dt
)
1808 RESOLVE_TAG (&tag_format
, dt
->format_expr
);
1809 RESOLVE_TAG (&tag_rec
, dt
->rec
);
1810 RESOLVE_TAG (&tag_advance
, dt
->advance
);
1811 RESOLVE_TAG (&tag_iomsg
, dt
->iomsg
);
1812 RESOLVE_TAG (&tag_iostat
, dt
->iostat
);
1813 RESOLVE_TAG (&tag_size
, dt
->size
);
1816 if (gfc_resolve_expr (e
) == SUCCESS
1817 && (e
->ts
.type
!= BT_INTEGER
1818 && (e
->ts
.type
!= BT_CHARACTER
1819 || e
->expr_type
!= EXPR_VARIABLE
)))
1822 ("UNIT specification at %L must be an INTEGER expression or a "
1823 "CHARACTER variable", &e
->where
);
1827 if (e
->ts
.type
== BT_CHARACTER
)
1829 if (gfc_has_vector_index (e
))
1831 gfc_error ("Internal unit with vector subscript at %L",
1837 if (e
->rank
&& e
->ts
.type
!= BT_CHARACTER
)
1839 gfc_error ("External IO UNIT cannot be an array at %L", &e
->where
);
1845 if (gfc_reference_st_label (dt
->err
, ST_LABEL_TARGET
) == FAILURE
)
1847 if (dt
->err
->defined
== ST_LABEL_UNKNOWN
)
1849 gfc_error ("ERR tag label %d at %L not defined",
1850 dt
->err
->value
, &dt
->err_where
);
1857 if (gfc_reference_st_label (dt
->end
, ST_LABEL_TARGET
) == FAILURE
)
1859 if (dt
->end
->defined
== ST_LABEL_UNKNOWN
)
1861 gfc_error ("END tag label %d at %L not defined",
1862 dt
->end
->value
, &dt
->end_where
);
1869 if (gfc_reference_st_label (dt
->eor
, ST_LABEL_TARGET
) == FAILURE
)
1871 if (dt
->eor
->defined
== ST_LABEL_UNKNOWN
)
1873 gfc_error ("EOR tag label %d at %L not defined",
1874 dt
->eor
->value
, &dt
->eor_where
);
1879 /* Check the format label actually exists. */
1880 if (dt
->format_label
&& dt
->format_label
!= &format_asterisk
1881 && dt
->format_label
->defined
== ST_LABEL_UNKNOWN
)
1883 gfc_error ("FORMAT label %d at %L not defined", dt
->format_label
->value
,
1884 &dt
->format_label
->where
);
1891 /* Given an io_kind, return its name. */
1894 io_kind_name (io_kind k
)
1913 gfc_internal_error ("io_kind_name(): bad I/O-kind");
1920 /* Match an IO iteration statement of the form:
1922 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
1924 which is equivalent to a single IO element. This function is
1925 mutually recursive with match_io_element(). */
1927 static match
match_io_element (io_kind k
, gfc_code
**);
1930 match_io_iterator (io_kind k
, gfc_code
** result
)
1932 gfc_code
*head
, *tail
, *new;
1940 old_loc
= gfc_current_locus
;
1942 if (gfc_match_char ('(') != MATCH_YES
)
1945 m
= match_io_element (k
, &head
);
1948 if (m
!= MATCH_YES
|| gfc_match_char (',') != MATCH_YES
)
1954 /* Can't be anything but an IO iterator. Build a list. */
1955 iter
= gfc_get_iterator ();
1959 m
= gfc_match_iterator (iter
, 0);
1960 if (m
== MATCH_ERROR
)
1964 gfc_check_do_variable (iter
->var
->symtree
);
1968 m
= match_io_element (k
, &new);
1969 if (m
== MATCH_ERROR
)
1978 tail
= gfc_append_code (tail
, new);
1980 if (gfc_match_char (',') != MATCH_YES
)
1989 if (gfc_match_char (')') != MATCH_YES
)
1992 new = gfc_get_code ();
1994 new->ext
.iterator
= iter
;
1996 new->block
= gfc_get_code ();
1997 new->block
->op
= EXEC_DO
;
1998 new->block
->next
= head
;
2004 gfc_error ("Syntax error in I/O iterator at %C");
2008 gfc_free_iterator (iter
, 1);
2009 gfc_free_statements (head
);
2010 gfc_current_locus
= old_loc
;
2015 /* Match a single element of an IO list, which is either a single
2016 expression or an IO Iterator. */
2019 match_io_element (io_kind k
, gfc_code
** cpp
)
2027 m
= match_io_iterator (k
, cpp
);
2033 m
= gfc_match_variable (&expr
, 0);
2035 gfc_error ("Expected variable in READ statement at %C");
2039 m
= gfc_match_expr (&expr
);
2041 gfc_error ("Expected expression in %s statement at %C",
2049 if (expr
->symtree
->n
.sym
->attr
.intent
== INTENT_IN
)
2052 ("Variable '%s' in input list at %C cannot be INTENT(IN)",
2053 expr
->symtree
->n
.sym
->name
);
2058 && gfc_impure_variable (expr
->symtree
->n
.sym
)
2059 && current_dt
->io_unit
->ts
.type
== BT_CHARACTER
)
2061 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2062 expr
->symtree
->n
.sym
->name
);
2066 if (gfc_check_do_variable (expr
->symtree
))
2072 if (current_dt
->io_unit
->ts
.type
== BT_CHARACTER
2074 && current_dt
->io_unit
->expr_type
== EXPR_VARIABLE
2075 && gfc_impure_variable (current_dt
->io_unit
->symtree
->n
.sym
))
2078 ("Cannot write to internal file unit '%s' at %C inside a "
2079 "PURE procedure", current_dt
->io_unit
->symtree
->n
.sym
->name
);
2091 gfc_free_expr (expr
);
2095 cp
= gfc_get_code ();
2096 cp
->op
= EXEC_TRANSFER
;
2104 /* Match an I/O list, building gfc_code structures as we go. */
2107 match_io_list (io_kind k
, gfc_code
** head_p
)
2109 gfc_code
*head
, *tail
, *new;
2112 *head_p
= head
= tail
= NULL
;
2113 if (gfc_match_eos () == MATCH_YES
)
2118 m
= match_io_element (k
, &new);
2119 if (m
== MATCH_ERROR
)
2124 tail
= gfc_append_code (tail
, new);
2128 if (gfc_match_eos () == MATCH_YES
)
2130 if (gfc_match_char (',') != MATCH_YES
)
2138 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k
));
2141 gfc_free_statements (head
);
2146 /* Attach the data transfer end node. */
2149 terminate_io (gfc_code
* io_code
)
2153 if (io_code
== NULL
)
2154 io_code
= new_st
.block
;
2156 c
= gfc_get_code ();
2157 c
->op
= EXEC_DT_END
;
2159 /* Point to structure that is already there */
2160 c
->ext
.dt
= new_st
.ext
.dt
;
2161 gfc_append_code (io_code
, c
);
2165 /* Check the constraints for a data transfer statement. The majority of the
2166 constraints appearing in 9.4 of the standard appear here. Some are handled
2167 in resolve_tag and others in gfc_resolve_dt. */
2170 check_io_constraints (io_kind k
, gfc_dt
*dt
, gfc_code
* io_code
, locus
* spec_end
)
2172 #define io_constraint(condition,msg,arg)\
2175 gfc_error(msg,arg);\
2181 gfc_symbol
* sym
= NULL
;
2186 if (expr
&& expr
->expr_type
== EXPR_VARIABLE
2187 && expr
->ts
.type
== BT_CHARACTER
)
2189 sym
= expr
->symtree
->n
.sym
;
2191 io_constraint (k
== M_WRITE
&& sym
->attr
.intent
== INTENT_IN
,
2192 "Internal file at %L must not be INTENT(IN)",
2195 io_constraint (gfc_has_vector_index (dt
->io_unit
),
2196 "Internal file incompatible with vector subscript at %L",
2199 io_constraint (dt
->rec
!= NULL
,
2200 "REC tag at %L is incompatible with internal file",
2203 io_constraint (dt
->namelist
!= NULL
,
2204 "Internal file at %L is incompatible with namelist",
2207 io_constraint (dt
->advance
!= NULL
,
2208 "ADVANCE tag at %L is incompatible with internal file",
2209 &dt
->advance
->where
);
2212 if (expr
&& expr
->ts
.type
!= BT_CHARACTER
)
2215 io_constraint (gfc_pure (NULL
)
2216 && (k
== M_READ
|| k
== M_WRITE
),
2217 "IO UNIT in %s statement at %C must be "
2218 "an internal file in a PURE procedure",
2225 io_constraint (dt
->end
,
2226 "END tag not allowed with output at %L",
2229 io_constraint (dt
->eor
,
2230 "EOR tag not allowed with output at %L",
2233 io_constraint (k
!= M_READ
&& dt
->size
,
2234 "SIZE=specifier not allowed with output at %L",
2239 io_constraint (dt
->size
&& dt
->advance
== NULL
,
2240 "SIZE tag at %L requires an ADVANCE tag",
2243 io_constraint (dt
->eor
&& dt
->advance
== NULL
,
2244 "EOR tag at %L requires an ADVANCE tag",
2252 io_constraint (io_code
&& dt
->namelist
,
2253 "NAMELIST cannot be followed by IO-list at %L",
2256 io_constraint (dt
->format_expr
,
2257 "IO spec-list cannot contain both NAMELIST group name "
2258 "and format specification at %L.",
2259 &dt
->format_expr
->where
);
2261 io_constraint (dt
->format_label
,
2262 "IO spec-list cannot contain both NAMELIST group name "
2263 "and format label at %L", spec_end
);
2265 io_constraint (dt
->rec
,
2266 "NAMELIST IO is not allowed with a REC=specifier "
2267 "at %L.", &dt
->rec
->where
);
2269 io_constraint (dt
->advance
,
2270 "NAMELIST IO is not allowed with a ADVANCE=specifier "
2271 "at %L.", &dt
->advance
->where
);
2276 io_constraint (dt
->end
,
2277 "An END tag is not allowed with a "
2278 "REC=specifier at %L.", &dt
->end_where
);
2281 io_constraint (dt
->format_label
== &format_asterisk
,
2282 "FMT=* is not allowed with a REC=specifier "
2283 "at %L.", spec_end
);
2288 const char * advance
;
2289 int not_yes
, not_no
;
2291 advance
= expr
->value
.character
.string
;
2293 io_constraint (dt
->format_label
== &format_asterisk
,
2294 "List directed format(*) is not allowed with a "
2295 "ADVANCE=specifier at %L.", &expr
->where
);
2297 not_no
= strncasecmp (advance
, "no", 2) != 0;
2298 not_yes
= strncasecmp (advance
, "yes", 2) != 0;
2300 io_constraint (expr
->expr_type
== EXPR_CONSTANT
2301 && not_no
&& not_yes
,
2302 "ADVANCE=specifier at %L must have value = "
2303 "YES or NO.", &expr
->where
);
2305 io_constraint (dt
->size
&& expr
->expr_type
== EXPR_CONSTANT
2306 && not_no
&& k
== M_READ
,
2307 "SIZE tag at %L requires an ADVANCE = 'NO'",
2310 io_constraint (dt
->eor
&& expr
->expr_type
== EXPR_CONSTANT
2311 && not_no
&& k
== M_READ
,
2312 "EOR tag at %L requires an ADVANCE = 'NO'",
2316 expr
= dt
->format_expr
;
2317 if (expr
!= NULL
&& expr
->expr_type
== EXPR_CONSTANT
)
2318 check_format_string (expr
);
2322 #undef io_constraint
2324 /* Match a READ, WRITE or PRINT statement. */
2327 match_io (io_kind k
)
2329 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
2338 where
= gfc_current_locus
;
2340 current_dt
= dt
= gfc_getmem (sizeof (gfc_dt
));
2341 if (gfc_match_char ('(') == MATCH_NO
)
2343 where
= gfc_current_locus
;
2346 else if (k
== M_PRINT
)
2348 /* Treat the non-standard case of PRINT namelist. */
2349 if ((gfc_current_form
== FORM_FIXED
|| gfc_peek_char () == ' ')
2350 && gfc_match_name (name
) == MATCH_YES
)
2352 gfc_find_symbol (name
, NULL
, 1, &sym
);
2353 if (sym
&& sym
->attr
.flavor
== FL_NAMELIST
)
2355 if (gfc_notify_std (GFC_STD_GNU
, "PRINT namelist at "
2356 "%C is an extension") == FAILURE
)
2362 dt
->io_unit
= default_unit (k
);
2367 gfc_current_locus
= where
;
2371 if (gfc_current_form
== FORM_FREE
)
2373 c
= gfc_peek_char();
2374 if (c
!= ' ' && c
!= '*' && c
!= '\'' && c
!= '"')
2381 m
= match_dt_format (dt
);
2382 if (m
== MATCH_ERROR
)
2388 dt
->io_unit
= default_unit (k
);
2392 /* Match a control list */
2393 if (match_dt_element (k
, dt
) == MATCH_YES
)
2395 if (match_dt_unit (k
, dt
) != MATCH_YES
)
2398 if (gfc_match_char (')') == MATCH_YES
)
2400 if (gfc_match_char (',') != MATCH_YES
)
2403 m
= match_dt_element (k
, dt
);
2406 if (m
== MATCH_ERROR
)
2409 m
= match_dt_format (dt
);
2412 if (m
== MATCH_ERROR
)
2415 where
= gfc_current_locus
;
2417 m
= gfc_match_name (name
);
2420 gfc_find_symbol (name
, NULL
, 1, &sym
);
2421 if (sym
&& sym
->attr
.flavor
== FL_NAMELIST
)
2424 if (k
== M_READ
&& check_namelist (sym
))
2433 gfc_current_locus
= where
;
2435 goto loop
; /* No matches, try regular elements */
2438 if (gfc_match_char (')') == MATCH_YES
)
2440 if (gfc_match_char (',') != MATCH_YES
)
2446 m
= match_dt_element (k
, dt
);
2449 if (m
== MATCH_ERROR
)
2452 if (gfc_match_char (')') == MATCH_YES
)
2454 if (gfc_match_char (',') != MATCH_YES
)
2460 /* Used in check_io_constraints, where no locus is available. */
2461 spec_end
= gfc_current_locus
;
2463 /* Optional leading comma (non-standard). */
2465 && gfc_match_char (',') == MATCH_YES
2467 && gfc_notify_std (GFC_STD_GNU
, "Extension: Comma before output "
2468 "item list at %C is an extension") == FAILURE
)
2472 if (gfc_match_eos () != MATCH_YES
)
2474 if (comma_flag
&& gfc_match_char (',') != MATCH_YES
)
2476 gfc_error ("Expected comma in I/O list at %C");
2481 m
= match_io_list (k
, &io_code
);
2482 if (m
== MATCH_ERROR
)
2488 /* A full IO statement has been matched. Check the constraints. spec_end is
2489 supplied for cases where no locus is supplied. */
2490 m
= check_io_constraints (k
, dt
, io_code
, &spec_end
);
2492 if (m
== MATCH_ERROR
)
2495 new_st
.op
= (k
== M_READ
) ? EXEC_READ
: EXEC_WRITE
;
2497 new_st
.block
= gfc_get_code ();
2498 new_st
.block
->op
= new_st
.op
;
2499 new_st
.block
->next
= io_code
;
2501 terminate_io (io_code
);
2506 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k
));
2516 gfc_match_read (void)
2518 return match_io (M_READ
);
2522 gfc_match_write (void)
2524 return match_io (M_WRITE
);
2528 gfc_match_print (void)
2532 m
= match_io (M_PRINT
);
2536 if (gfc_pure (NULL
))
2538 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
2546 /* Free a gfc_inquire structure. */
2549 gfc_free_inquire (gfc_inquire
* inquire
)
2552 if (inquire
== NULL
)
2555 gfc_free_expr (inquire
->unit
);
2556 gfc_free_expr (inquire
->file
);
2557 gfc_free_expr (inquire
->iomsg
);
2558 gfc_free_expr (inquire
->iostat
);
2559 gfc_free_expr (inquire
->exist
);
2560 gfc_free_expr (inquire
->opened
);
2561 gfc_free_expr (inquire
->number
);
2562 gfc_free_expr (inquire
->named
);
2563 gfc_free_expr (inquire
->name
);
2564 gfc_free_expr (inquire
->access
);
2565 gfc_free_expr (inquire
->sequential
);
2566 gfc_free_expr (inquire
->direct
);
2567 gfc_free_expr (inquire
->form
);
2568 gfc_free_expr (inquire
->formatted
);
2569 gfc_free_expr (inquire
->unformatted
);
2570 gfc_free_expr (inquire
->recl
);
2571 gfc_free_expr (inquire
->nextrec
);
2572 gfc_free_expr (inquire
->blank
);
2573 gfc_free_expr (inquire
->position
);
2574 gfc_free_expr (inquire
->action
);
2575 gfc_free_expr (inquire
->read
);
2576 gfc_free_expr (inquire
->write
);
2577 gfc_free_expr (inquire
->readwrite
);
2578 gfc_free_expr (inquire
->delim
);
2579 gfc_free_expr (inquire
->pad
);
2580 gfc_free_expr (inquire
->iolength
);
2581 gfc_free_expr (inquire
->convert
);
2587 /* Match an element of an INQUIRE statement. */
2589 #define RETM if (m != MATCH_NO) return m;
2592 match_inquire_element (gfc_inquire
* inquire
)
2596 m
= match_etag (&tag_unit
, &inquire
->unit
);
2597 RETM m
= match_etag (&tag_file
, &inquire
->file
);
2598 RETM m
= match_ltag (&tag_err
, &inquire
->err
);
2599 RETM m
= match_out_tag (&tag_iomsg
, &inquire
->iomsg
);
2600 RETM m
= match_out_tag (&tag_iostat
, &inquire
->iostat
);
2601 RETM m
= match_vtag (&tag_exist
, &inquire
->exist
);
2602 RETM m
= match_vtag (&tag_opened
, &inquire
->opened
);
2603 RETM m
= match_vtag (&tag_named
, &inquire
->named
);
2604 RETM m
= match_vtag (&tag_name
, &inquire
->name
);
2605 RETM m
= match_out_tag (&tag_number
, &inquire
->number
);
2606 RETM m
= match_vtag (&tag_s_access
, &inquire
->access
);
2607 RETM m
= match_vtag (&tag_sequential
, &inquire
->sequential
);
2608 RETM m
= match_vtag (&tag_direct
, &inquire
->direct
);
2609 RETM m
= match_vtag (&tag_s_form
, &inquire
->form
);
2610 RETM m
= match_vtag (&tag_formatted
, &inquire
->formatted
);
2611 RETM m
= match_vtag (&tag_unformatted
, &inquire
->unformatted
);
2612 RETM m
= match_out_tag (&tag_s_recl
, &inquire
->recl
);
2613 RETM m
= match_out_tag (&tag_nextrec
, &inquire
->nextrec
);
2614 RETM m
= match_vtag (&tag_s_blank
, &inquire
->blank
);
2615 RETM m
= match_vtag (&tag_s_position
, &inquire
->position
);
2616 RETM m
= match_vtag (&tag_s_action
, &inquire
->action
);
2617 RETM m
= match_vtag (&tag_read
, &inquire
->read
);
2618 RETM m
= match_vtag (&tag_write
, &inquire
->write
);
2619 RETM m
= match_vtag (&tag_readwrite
, &inquire
->readwrite
);
2620 RETM m
= match_vtag (&tag_s_delim
, &inquire
->delim
);
2621 RETM m
= match_vtag (&tag_s_pad
, &inquire
->pad
);
2622 RETM m
= match_vtag (&tag_iolength
, &inquire
->iolength
);
2623 RETM m
= match_vtag (&tag_convert
, &inquire
->convert
);
2624 RETM
return MATCH_NO
;
2631 gfc_match_inquire (void)
2633 gfc_inquire
*inquire
;
2638 m
= gfc_match_char ('(');
2642 inquire
= gfc_getmem (sizeof (gfc_inquire
));
2644 loc
= gfc_current_locus
;
2646 m
= match_inquire_element (inquire
);
2647 if (m
== MATCH_ERROR
)
2651 m
= gfc_match_expr (&inquire
->unit
);
2652 if (m
== MATCH_ERROR
)
2658 /* See if we have the IOLENGTH form of the inquire statement. */
2659 if (inquire
->iolength
!= NULL
)
2661 if (gfc_match_char (')') != MATCH_YES
)
2664 m
= match_io_list (M_INQUIRE
, &code
);
2665 if (m
== MATCH_ERROR
)
2670 new_st
.op
= EXEC_IOLENGTH
;
2671 new_st
.expr
= inquire
->iolength
;
2672 new_st
.ext
.inquire
= inquire
;
2674 if (gfc_pure (NULL
))
2676 gfc_free_statements (code
);
2677 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
2681 new_st
.block
= gfc_get_code ();
2682 new_st
.block
->op
= EXEC_IOLENGTH
;
2683 terminate_io (code
);
2684 new_st
.block
->next
= code
;
2688 /* At this point, we have the non-IOLENGTH inquire statement. */
2691 if (gfc_match_char (')') == MATCH_YES
)
2693 if (gfc_match_char (',') != MATCH_YES
)
2696 m
= match_inquire_element (inquire
);
2697 if (m
== MATCH_ERROR
)
2702 if (inquire
->iolength
!= NULL
)
2704 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
2709 if (gfc_match_eos () != MATCH_YES
)
2712 if (inquire
->unit
!= NULL
&& inquire
->file
!= NULL
)
2714 gfc_error ("INQUIRE statement at %L cannot contain both FILE and"
2715 " UNIT specifiers", &loc
);
2719 if (inquire
->unit
== NULL
&& inquire
->file
== NULL
)
2721 gfc_error ("INQUIRE statement at %L requires either FILE or"
2722 " UNIT specifier", &loc
);
2726 if (gfc_pure (NULL
))
2728 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
2732 new_st
.op
= EXEC_INQUIRE
;
2733 new_st
.ext
.inquire
= inquire
;
2737 gfc_syntax_error (ST_INQUIRE
);
2740 gfc_free_inquire (inquire
);
2745 /* Resolve everything in a gfc_inquire structure. */
2748 gfc_resolve_inquire (gfc_inquire
* inquire
)
2751 RESOLVE_TAG (&tag_unit
, inquire
->unit
);
2752 RESOLVE_TAG (&tag_file
, inquire
->file
);
2753 RESOLVE_TAG (&tag_iomsg
, inquire
->iomsg
);
2754 RESOLVE_TAG (&tag_iostat
, inquire
->iostat
);
2755 RESOLVE_TAG (&tag_exist
, inquire
->exist
);
2756 RESOLVE_TAG (&tag_opened
, inquire
->opened
);
2757 RESOLVE_TAG (&tag_number
, inquire
->number
);
2758 RESOLVE_TAG (&tag_named
, inquire
->named
);
2759 RESOLVE_TAG (&tag_name
, inquire
->name
);
2760 RESOLVE_TAG (&tag_s_access
, inquire
->access
);
2761 RESOLVE_TAG (&tag_sequential
, inquire
->sequential
);
2762 RESOLVE_TAG (&tag_direct
, inquire
->direct
);
2763 RESOLVE_TAG (&tag_s_form
, inquire
->form
);
2764 RESOLVE_TAG (&tag_formatted
, inquire
->formatted
);
2765 RESOLVE_TAG (&tag_unformatted
, inquire
->unformatted
);
2766 RESOLVE_TAG (&tag_s_recl
, inquire
->recl
);
2767 RESOLVE_TAG (&tag_nextrec
, inquire
->nextrec
);
2768 RESOLVE_TAG (&tag_s_blank
, inquire
->blank
);
2769 RESOLVE_TAG (&tag_s_position
, inquire
->position
);
2770 RESOLVE_TAG (&tag_s_action
, inquire
->action
);
2771 RESOLVE_TAG (&tag_read
, inquire
->read
);
2772 RESOLVE_TAG (&tag_write
, inquire
->write
);
2773 RESOLVE_TAG (&tag_readwrite
, inquire
->readwrite
);
2774 RESOLVE_TAG (&tag_s_delim
, inquire
->delim
);
2775 RESOLVE_TAG (&tag_s_pad
, inquire
->pad
);
2776 RESOLVE_TAG (&tag_iolength
, inquire
->iolength
);
2777 RESOLVE_TAG (&tag_convert
, inquire
->convert
);
2779 if (gfc_reference_st_label (inquire
->err
, ST_LABEL_TARGET
) == FAILURE
)