1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
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 3, 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 COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 format_asterisk = {0, NULL, NULL, -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL,
35 const char *name, *spec, *value;
41 tag_file = { "FILE", " file =", " %e", BT_CHARACTER },
42 tag_status = { "STATUS", " status =", " %e", BT_CHARACTER},
43 tag_e_access = {"ACCESS", " access =", " %e", BT_CHARACTER},
44 tag_e_form = {"FORM", " form =", " %e", BT_CHARACTER},
45 tag_e_recl = {"RECL", " recl =", " %e", BT_INTEGER},
46 tag_e_blank = {"BLANK", " blank =", " %e", BT_CHARACTER},
47 tag_e_position = {"POSITION", " position =", " %e", BT_CHARACTER},
48 tag_e_action = {"ACTION", " action =", " %e", BT_CHARACTER},
49 tag_e_delim = {"DELIM", " delim =", " %e", BT_CHARACTER},
50 tag_e_pad = {"PAD", " pad =", " %e", BT_CHARACTER},
51 tag_e_decimal = {"DECIMAL", " decimal =", " %e", BT_CHARACTER},
52 tag_e_encoding = {"ENCODING", " encoding =", " %e", BT_CHARACTER},
53 tag_e_async = {"ASYNCHRONOUS", " asynchronous =", " %e", BT_CHARACTER},
54 tag_e_round = {"ROUND", " round =", " %e", BT_CHARACTER},
55 tag_e_sign = {"SIGN", " sign =", " %e", BT_CHARACTER},
56 tag_unit = {"UNIT", " unit =", " %e", BT_INTEGER},
57 tag_advance = {"ADVANCE", " advance =", " %e", BT_CHARACTER},
58 tag_rec = {"REC", " rec =", " %e", BT_INTEGER},
59 tag_spos = {"POSITION", " pos =", " %e", BT_INTEGER},
60 tag_format = {"FORMAT", NULL, NULL, BT_CHARACTER},
61 tag_iomsg = {"IOMSG", " iomsg =", " %e", BT_CHARACTER},
62 tag_iostat = {"IOSTAT", " iostat =", " %v", BT_INTEGER},
63 tag_size = {"SIZE", " size =", " %v", BT_INTEGER},
64 tag_exist = {"EXIST", " exist =", " %v", BT_LOGICAL},
65 tag_opened = {"OPENED", " opened =", " %v", BT_LOGICAL},
66 tag_named = {"NAMED", " named =", " %v", BT_LOGICAL},
67 tag_name = {"NAME", " name =", " %v", BT_CHARACTER},
68 tag_number = {"NUMBER", " number =", " %v", BT_INTEGER},
69 tag_s_access = {"ACCESS", " access =", " %v", BT_CHARACTER},
70 tag_sequential = {"SEQUENTIAL", " sequential =", " %v", BT_CHARACTER},
71 tag_direct = {"DIRECT", " direct =", " %v", BT_CHARACTER},
72 tag_s_form = {"FORM", " form =", " %v", BT_CHARACTER},
73 tag_formatted = {"FORMATTED", " formatted =", " %v", BT_CHARACTER},
74 tag_unformatted = {"UNFORMATTED", " unformatted =", " %v", BT_CHARACTER},
75 tag_s_recl = {"RECL", " recl =", " %v", BT_INTEGER},
76 tag_nextrec = {"NEXTREC", " nextrec =", " %v", BT_INTEGER},
77 tag_s_blank = {"BLANK", " blank =", " %v", BT_CHARACTER},
78 tag_s_position = {"POSITION", " position =", " %v", BT_CHARACTER},
79 tag_s_action = {"ACTION", " action =", " %v", BT_CHARACTER},
80 tag_read = {"READ", " read =", " %v", BT_CHARACTER},
81 tag_write = {"WRITE", " write =", " %v", BT_CHARACTER},
82 tag_readwrite = {"READWRITE", " readwrite =", " %v", BT_CHARACTER},
83 tag_s_delim = {"DELIM", " delim =", " %v", BT_CHARACTER},
84 tag_s_pad = {"PAD", " pad =", " %v", BT_CHARACTER},
85 tag_s_decimal = {"DECIMAL", " decimal =", " %v", BT_CHARACTER},
86 tag_s_encoding = {"ENCODING", " encoding =", " %v", BT_CHARACTER},
87 tag_s_async = {"ASYNCHRONOUS", " asynchronous =", " %v", BT_CHARACTER},
88 tag_s_round = {"ROUND", " round =", " %v", BT_CHARACTER},
89 tag_s_sign = {"SIGN", " sign =", " %v", BT_CHARACTER},
90 tag_iolength = {"IOLENGTH", " iolength =", " %v", BT_INTEGER},
91 tag_convert = {"CONVERT", " convert =", " %e", BT_CHARACTER},
92 tag_strm_out = {"POS", " pos =", " %v", BT_INTEGER},
93 tag_err = {"ERR", " err =", " %l", BT_UNKNOWN},
94 tag_end = {"END", " end =", " %l", BT_UNKNOWN},
95 tag_eor = {"EOR", " eor =", " %l", BT_UNKNOWN},
96 tag_id = {"ID", " id =", " %v", BT_INTEGER},
97 tag_pending = {"PENDING", " pending =", " %v", BT_LOGICAL};
99 static gfc_dt *current_dt;
101 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
104 /**************** Fortran 95 FORMAT parser *****************/
106 /* FORMAT tokens returned by format_lex(). */
109 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
110 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_LPAREN,
111 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
112 FMT_E, FMT_EXT, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END, FMT_ERROR, FMT_DC,
113 FMT_DP, FMT_T, FMT_TR, FMT_TL
117 /* Local variables for checking format strings. The saved_token is
118 used to back up by a single format token during the parsing
120 static gfc_char_t *format_string;
121 static int format_string_pos;
122 static int format_length, use_last_char;
123 static char error_element;
124 static locus format_locus;
126 static format_token saved_token;
129 { MODE_STRING, MODE_FORMAT, MODE_COPY }
133 /* Return the next character in the format string. */
136 next_char (int in_string)
148 if (mode == MODE_STRING)
149 c = *format_string++;
152 c = gfc_next_char_literal (in_string);
157 if (gfc_option.flag_backslash && c == '\\')
159 locus old_locus = gfc_current_locus;
161 if (gfc_match_special_char (&c) == MATCH_NO)
162 gfc_current_locus = old_locus;
164 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
165 gfc_warning ("Extension: backslash character at %C");
168 if (mode == MODE_COPY)
169 *format_string++ = c;
171 if (mode != MODE_STRING)
172 format_locus = gfc_current_locus;
176 c = gfc_wide_toupper (c);
181 /* Back up one character position. Only works once. */
189 /* Eat up the spaces and return a character. */
192 next_char_not_space (bool *error)
197 error_element = c = next_char (0);
200 if (gfc_option.allow_std & GFC_STD_GNU)
201 gfc_warning ("Extension: Tab character in format at %C");
204 gfc_error ("Extension: Tab character in format at %C");
210 while (gfc_is_whitespace (c));
214 static int value = 0;
216 /* Simple lexical analyzer for getting the next token in a FORMAT
228 if (saved_token != FMT_NONE)
231 saved_token = FMT_NONE;
235 c = next_char_not_space (&error);
243 c = next_char_not_space (&error);
254 c = next_char_not_space (&error);
256 value = 10 * value + c - '0';
265 token = FMT_SIGNED_INT;
284 c = next_char_not_space (&error);
287 value = 10 * value + c - '0';
295 token = zflag ? FMT_ZERO : FMT_POSINT;
319 c = next_char_not_space (&error);
347 c = next_char_not_space (&error);
348 if (c != 'P' && c != 'S')
355 c = next_char_not_space (&error);
356 if (c == 'N' || c == 'Z')
417 c = next_char_not_space (&error);
418 if (c == 'N' || c == 'S')
445 c = next_char_not_space (&error);
448 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
449 "specifier not allowed at %C") == FAILURE)
455 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
456 "specifier not allowed at %C") == FAILURE)
483 /* Check a format statement. The format string, either from a FORMAT
484 statement or a constant in an I/O statement has already been parsed
485 by itself, and we are checking it for validity. The dual origin
486 means that the warning message is a little less than great. */
489 check_format (bool is_input)
491 const char *posint_required = _("Positive width required");
492 const char *nonneg_required = _("Nonnegative width required");
493 const char *unexpected_element = _("Unexpected element '%c' in format string"
495 const char *unexpected_end = _("Unexpected end of format string");
496 const char *zero_width = _("Zero width in format descriptor");
505 saved_token = FMT_NONE;
509 format_string_pos = 0;
516 error = _("Missing leading left parenthesis");
524 goto finished; /* Empty format is legal */
528 /* In this state, the next thing has to be a format item. */
557 /* Signed integer can only precede a P format. */
563 error = _("Expected P edit descriptor");
570 /* P requires a prior number. */
571 error = _("P descriptor requires leading scale factor");
575 /* X requires a prior number if we're being pedantic. */
576 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
577 "requires leading space count at %C")
589 goto extension_optional_comma;
600 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %C")
603 if (t != FMT_RPAREN || level > 0)
605 gfc_warning ("$ should be the last specifier in format at %C");
606 goto optional_comma_1;
626 error = unexpected_end;
630 error = unexpected_element;
635 /* In this state, t must currently be a data descriptor.
636 Deal with things that can/must follow the descriptor. */
654 error = _("Repeat count cannot follow P descriptor");
669 error = _("Positive width required with T descriptor");
681 switch (gfc_notification_std (GFC_STD_GNU))
684 gfc_warning ("Extension: Missing positive width after L "
690 error = posint_required;
720 if (t == FMT_G && u == FMT_ZERO)
727 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: 'G0' in "
728 "format at %C") == FAILURE)
739 error = posint_required;
745 error = _("E specifier not allowed with g0 descriptor");
757 /* Warn if -std=legacy, otherwise error. */
758 if (gfc_option.warn_std != 0)
759 gfc_error_now ("Period required in format specifier at %C");
761 gfc_warning ("Period required in format specifier at %C");
769 if (u != FMT_ZERO && u != FMT_POSINT)
771 error = nonneg_required;
778 /* Look for optional exponent. */
793 error = _("Positive exponent width required");
804 if (t != FMT_ZERO && t != FMT_POSINT)
806 error = nonneg_required;
809 else if (is_input && t == FMT_ZERO)
811 error = posint_required;
820 /* Warn if -std=legacy, otherwise error. */
821 if (gfc_option.warn_std != 0)
822 gfc_error_now ("Period required in format specifier at %C");
824 gfc_warning ("Period required in format specifier at %C");
832 if (t != FMT_ZERO && t != FMT_POSINT)
834 error = nonneg_required;
841 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
842 gfc_warning ("The H format specifier at %C is"
843 " a Fortran 95 deleted feature");
845 if (mode == MODE_STRING)
847 format_string += value;
848 format_length -= value;
864 if (t != FMT_ZERO && t != FMT_POSINT)
866 error = nonneg_required;
869 else if (is_input && t == FMT_ZERO)
871 error = posint_required;
887 if (t != FMT_ZERO && t != FMT_POSINT)
889 error = nonneg_required;
897 error = unexpected_element;
902 /* Between a descriptor and what comes next. */
923 error = unexpected_end;
927 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
934 /* Optional comma is a weird between state where we've just finished
935 reading a colon, slash, dollar or P descriptor. */
952 /* Assume that we have another format item. */
959 extension_optional_comma:
960 /* As a GNU extension, permit a missing comma after a string literal. */
980 error = unexpected_end;
984 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
994 if (mode != MODE_FORMAT)
995 format_locus.nextc += format_string_pos;
996 if (error == unexpected_element)
997 gfc_error (error, error_element, &format_locus);
999 gfc_error ("%s in format string at %L", error, &format_locus);
1008 /* Given an expression node that is a constant string, see if it looks
1009 like a format string. */
1012 check_format_string (gfc_expr *e, bool is_input)
1014 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
1018 format_string = e->value.character.string;
1020 /* More elaborate measures are needed to show where a problem is within a
1021 format string that has been calculated, but that's probably not worth the
1023 format_locus = e->where;
1025 return check_format (is_input);
1029 /************ Fortran 95 I/O statement matchers *************/
1031 /* Match a FORMAT statement. This amounts to actually parsing the
1032 format descriptors in order to correctly locate the end of the
1036 gfc_match_format (void)
1041 if (gfc_current_ns->proc_name
1042 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
1044 gfc_error ("Format statement in module main block at %C");
1048 if (gfc_statement_label == NULL)
1050 gfc_error ("Missing format label at %C");
1053 gfc_gobble_whitespace ();
1058 start = gfc_current_locus;
1060 if (check_format (false) == FAILURE)
1063 if (gfc_match_eos () != MATCH_YES)
1065 gfc_syntax_error (ST_FORMAT);
1069 /* The label doesn't get created until after the statement is done
1070 being matched, so we have to leave the string for later. */
1072 gfc_current_locus = start; /* Back to the beginning */
1075 new_st.op = EXEC_NOP;
1078 e->expr_type = EXPR_CONSTANT;
1079 e->ts.type = BT_CHARACTER;
1080 e->ts.kind = gfc_default_character_kind;
1082 e->value.character.string = format_string
1083 = gfc_get_wide_string (format_length + 1);
1084 e->value.character.length = format_length;
1085 gfc_statement_label->format = e;
1088 check_format (false); /* Guaranteed to succeed */
1089 gfc_match_eos (); /* Guaranteed to succeed */
1095 /* Match an expression I/O tag of some sort. */
1098 match_etag (const io_tag *tag, gfc_expr **v)
1103 m = gfc_match (tag->spec);
1107 m = gfc_match (tag->value, &result);
1110 gfc_error ("Invalid value for %s specification at %C", tag->name);
1116 gfc_error ("Duplicate %s specification at %C", tag->name);
1117 gfc_free_expr (result);
1126 /* Match a variable I/O tag of some sort. */
1129 match_vtag (const io_tag *tag, gfc_expr **v)
1134 m = gfc_match (tag->spec);
1138 m = gfc_match (tag->value, &result);
1141 gfc_error ("Invalid value for %s specification at %C", tag->name);
1147 gfc_error ("Duplicate %s specification at %C", tag->name);
1148 gfc_free_expr (result);
1152 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1154 gfc_error ("Variable %s cannot be INTENT(IN) at %C", tag->name);
1155 gfc_free_expr (result);
1159 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1161 gfc_error ("Variable %s cannot be assigned in PURE procedure at %C",
1163 gfc_free_expr (result);
1172 /* Match I/O tags that cause variables to become redefined. */
1175 match_out_tag (const io_tag *tag, gfc_expr **result)
1179 m = match_vtag (tag, result);
1181 gfc_check_do_variable ((*result)->symtree);
1187 /* Match a label I/O tag. */
1190 match_ltag (const io_tag *tag, gfc_st_label ** label)
1196 m = gfc_match (tag->spec);
1200 m = gfc_match (tag->value, label);
1203 gfc_error ("Invalid value for %s specification at %C", tag->name);
1209 gfc_error ("Duplicate %s label specification at %C", tag->name);
1213 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1220 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1223 resolve_tag_format (const gfc_expr *e)
1225 if (e->expr_type == EXPR_CONSTANT
1226 && (e->ts.type != BT_CHARACTER
1227 || e->ts.kind != gfc_default_character_kind))
1229 gfc_error ("Constant expression in FORMAT tag at %L must be "
1230 "of type default CHARACTER", &e->where);
1234 /* If e's rank is zero and e is not an element of an array, it should be
1235 of integer or character type. The integer variable should be
1237 if (e->symtree == NULL || e->symtree->n.sym->as == NULL
1238 || e->symtree->n.sym->as->rank == 0)
1240 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1242 gfc_error ("FORMAT tag at %L must be of type CHARACTER or INTEGER",
1246 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1248 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1249 "variable in FORMAT tag at %L", &e->where)
1252 if (e->symtree->n.sym->attr.assign != 1)
1254 gfc_error ("Variable '%s' at %L has not been assigned a "
1255 "format label", e->symtree->n.sym->name, &e->where);
1259 else if (e->ts.type == BT_INTEGER)
1261 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1262 "variable", gfc_basic_typename (e->ts.type), &e->where);
1269 /* If rank is nonzero, we allow the type to be character under GFC_STD_GNU
1270 and other type under GFC_STD_LEGACY. It may be assigned an Hollerith
1272 if (e->ts.type == BT_CHARACTER)
1274 if (gfc_notify_std (GFC_STD_GNU, "Extension: Character array "
1275 "in FORMAT tag at %L", &e->where) == FAILURE)
1280 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1281 "in FORMAT tag at %L", &e->where) == FAILURE)
1289 /* Do expression resolution and type-checking on an expression tag. */
1292 resolve_tag (const io_tag *tag, gfc_expr *e)
1297 if (gfc_resolve_expr (e) == FAILURE)
1300 if (tag == &tag_format)
1301 return resolve_tag_format (e);
1303 if (e->ts.type != tag->type)
1305 gfc_error ("%s tag at %L must be of type %s", tag->name,
1306 &e->where, gfc_basic_typename (tag->type));
1312 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1316 if (tag == &tag_iomsg)
1318 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1319 &e->where) == FAILURE)
1323 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1324 && e->ts.kind != gfc_default_integer_kind)
1326 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1327 "INTEGER in %s tag at %L", tag->name, &e->where)
1332 if (tag == &tag_convert)
1334 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1335 &e->where) == FAILURE)
1343 /* Match a single tag of an OPEN statement. */
1346 match_open_element (gfc_open *open)
1350 m = match_etag (&tag_e_async, &open->asynchronous);
1353 m = match_etag (&tag_unit, &open->unit);
1356 m = match_out_tag (&tag_iomsg, &open->iomsg);
1359 m = match_out_tag (&tag_iostat, &open->iostat);
1362 m = match_etag (&tag_file, &open->file);
1365 m = match_etag (&tag_status, &open->status);
1368 m = match_etag (&tag_e_access, &open->access);
1371 m = match_etag (&tag_e_form, &open->form);
1374 m = match_etag (&tag_e_recl, &open->recl);
1377 m = match_etag (&tag_e_blank, &open->blank);
1380 m = match_etag (&tag_e_position, &open->position);
1383 m = match_etag (&tag_e_action, &open->action);
1386 m = match_etag (&tag_e_delim, &open->delim);
1389 m = match_etag (&tag_e_pad, &open->pad);
1392 m = match_etag (&tag_e_decimal, &open->decimal);
1395 m = match_etag (&tag_e_encoding, &open->encoding);
1398 m = match_etag (&tag_e_round, &open->round);
1401 m = match_etag (&tag_e_sign, &open->sign);
1404 m = match_ltag (&tag_err, &open->err);
1407 m = match_etag (&tag_convert, &open->convert);
1415 /* Free the gfc_open structure and all the expressions it contains. */
1418 gfc_free_open (gfc_open *open)
1423 gfc_free_expr (open->unit);
1424 gfc_free_expr (open->iomsg);
1425 gfc_free_expr (open->iostat);
1426 gfc_free_expr (open->file);
1427 gfc_free_expr (open->status);
1428 gfc_free_expr (open->access);
1429 gfc_free_expr (open->form);
1430 gfc_free_expr (open->recl);
1431 gfc_free_expr (open->blank);
1432 gfc_free_expr (open->position);
1433 gfc_free_expr (open->action);
1434 gfc_free_expr (open->delim);
1435 gfc_free_expr (open->pad);
1436 gfc_free_expr (open->decimal);
1437 gfc_free_expr (open->encoding);
1438 gfc_free_expr (open->round);
1439 gfc_free_expr (open->sign);
1440 gfc_free_expr (open->convert);
1441 gfc_free_expr (open->asynchronous);
1446 /* Resolve everything in a gfc_open structure. */
1449 gfc_resolve_open (gfc_open *open)
1452 RESOLVE_TAG (&tag_unit, open->unit);
1453 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1454 RESOLVE_TAG (&tag_iostat, open->iostat);
1455 RESOLVE_TAG (&tag_file, open->file);
1456 RESOLVE_TAG (&tag_status, open->status);
1457 RESOLVE_TAG (&tag_e_access, open->access);
1458 RESOLVE_TAG (&tag_e_form, open->form);
1459 RESOLVE_TAG (&tag_e_recl, open->recl);
1460 RESOLVE_TAG (&tag_e_blank, open->blank);
1461 RESOLVE_TAG (&tag_e_position, open->position);
1462 RESOLVE_TAG (&tag_e_action, open->action);
1463 RESOLVE_TAG (&tag_e_delim, open->delim);
1464 RESOLVE_TAG (&tag_e_pad, open->pad);
1465 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1466 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1467 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1468 RESOLVE_TAG (&tag_e_round, open->round);
1469 RESOLVE_TAG (&tag_e_sign, open->sign);
1470 RESOLVE_TAG (&tag_convert, open->convert);
1472 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1479 /* Check if a given value for a SPECIFIER is either in the list of values
1480 allowed in F95 or F2003, issuing an error message and returning a zero
1481 value if it is not allowed. */
1484 compare_to_allowed_values (const char *specifier, const char *allowed[],
1485 const char *allowed_f2003[],
1486 const char *allowed_gnu[], gfc_char_t *value,
1487 const char *statement, bool warn)
1492 len = gfc_wide_strlen (value);
1495 for (len--; len > 0; len--)
1496 if (value[len] != ' ')
1501 for (i = 0; allowed[i]; i++)
1502 if (len == strlen (allowed[i])
1503 && gfc_wide_strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1506 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1507 if (len == strlen (allowed_f2003[i])
1508 && gfc_wide_strncasecmp (value, allowed_f2003[i],
1509 strlen (allowed_f2003[i])) == 0)
1511 notification n = gfc_notification_std (GFC_STD_F2003);
1513 if (n == WARNING || (warn && n == ERROR))
1515 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1516 "has value '%s'", specifier, statement,
1523 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1524 "%s statement at %C has value '%s'", specifier,
1525 statement, allowed_f2003[i]);
1533 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1534 if (len == strlen (allowed_gnu[i])
1535 && gfc_wide_strncasecmp (value, allowed_gnu[i],
1536 strlen (allowed_gnu[i])) == 0)
1538 notification n = gfc_notification_std (GFC_STD_GNU);
1540 if (n == WARNING || (warn && n == ERROR))
1542 gfc_warning ("Extension: %s specifier in %s statement at %C "
1543 "has value '%s'", specifier, statement,
1550 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1551 "%s statement at %C has value '%s'", specifier,
1552 statement, allowed_gnu[i]);
1562 char *s = gfc_widechar_to_char (value, -1);
1563 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1564 specifier, statement, s);
1570 char *s = gfc_widechar_to_char (value, -1);
1571 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1572 specifier, statement, s);
1579 /* Match an OPEN statement. */
1582 gfc_match_open (void)
1588 m = gfc_match_char ('(');
1592 open = XCNEW (gfc_open);
1594 m = match_open_element (open);
1596 if (m == MATCH_ERROR)
1600 m = gfc_match_expr (&open->unit);
1603 if (m == MATCH_ERROR)
1609 if (gfc_match_char (')') == MATCH_YES)
1611 if (gfc_match_char (',') != MATCH_YES)
1614 m = match_open_element (open);
1615 if (m == MATCH_ERROR)
1621 if (gfc_match_eos () == MATCH_NO)
1624 if (gfc_pure (NULL))
1626 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1630 warn = (open->err || open->iostat) ? true : false;
1631 /* Checks on the ACCESS specifier. */
1632 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1634 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1635 static const char *access_f2003[] = { "STREAM", NULL };
1636 static const char *access_gnu[] = { "APPEND", NULL };
1638 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1640 open->access->value.character.string,
1645 /* Checks on the ACTION specifier. */
1646 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1648 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1650 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1651 open->action->value.character.string,
1656 /* Checks on the ASYNCHRONOUS specifier. */
1657 if (open->asynchronous)
1659 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1660 "not allowed in Fortran 95") == FAILURE)
1663 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1665 static const char * asynchronous[] = { "YES", "NO", NULL };
1667 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1668 NULL, NULL, open->asynchronous->value.character.string,
1674 /* Checks on the BLANK specifier. */
1677 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1678 "not allowed in Fortran 95") == FAILURE)
1681 if (open->blank->expr_type == EXPR_CONSTANT)
1683 static const char *blank[] = { "ZERO", "NULL", NULL };
1685 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1686 open->blank->value.character.string,
1692 /* Checks on the DECIMAL specifier. */
1695 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1696 "not allowed in Fortran 95") == FAILURE)
1699 if (open->decimal->expr_type == EXPR_CONSTANT)
1701 static const char * decimal[] = { "COMMA", "POINT", NULL };
1703 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1704 open->decimal->value.character.string,
1710 /* Checks on the DELIM specifier. */
1713 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1714 "not allowed in Fortran 95") == FAILURE)
1717 if (open->delim->expr_type == EXPR_CONSTANT)
1719 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1721 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1722 open->delim->value.character.string,
1728 /* Checks on the ENCODING specifier. */
1731 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1732 "not allowed in Fortran 95") == FAILURE)
1735 if (open->encoding->expr_type == EXPR_CONSTANT)
1737 static const char * encoding[] = { "DEFAULT", "UTF-8", NULL };
1739 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1740 open->encoding->value.character.string,
1746 /* Checks on the FORM specifier. */
1747 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1749 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1751 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1752 open->form->value.character.string,
1757 /* Checks on the PAD specifier. */
1758 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1760 static const char *pad[] = { "YES", "NO", NULL };
1762 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1763 open->pad->value.character.string,
1768 /* Checks on the POSITION specifier. */
1769 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1771 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1773 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1774 open->position->value.character.string,
1779 /* Checks on the ROUND specifier. */
1782 /* When implemented, change the following to use gfc_notify_std F2003. */
1783 gfc_error ("Fortran F2003: ROUND= specifier at %C not implemented");
1786 if (open->round->expr_type == EXPR_CONSTANT)
1788 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1789 "COMPATIBLE", "PROCESSOR_DEFINED",
1792 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1793 open->round->value.character.string,
1799 /* Checks on the SIGN specifier. */
1802 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
1803 "not allowed in Fortran 95") == FAILURE)
1806 if (open->sign->expr_type == EXPR_CONSTANT)
1808 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
1811 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
1812 open->sign->value.character.string,
1818 #define warn_or_error(...) \
1821 gfc_warning (__VA_ARGS__); \
1824 gfc_error (__VA_ARGS__); \
1829 /* Checks on the RECL specifier. */
1830 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
1831 && open->recl->ts.type == BT_INTEGER
1832 && mpz_sgn (open->recl->value.integer) != 1)
1834 warn_or_error ("RECL in OPEN statement at %C must be positive");
1837 /* Checks on the STATUS specifier. */
1838 if (open->status && open->status->expr_type == EXPR_CONSTANT)
1840 static const char *status[] = { "OLD", "NEW", "SCRATCH",
1841 "REPLACE", "UNKNOWN", NULL };
1843 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1844 open->status->value.character.string,
1848 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
1849 the FILE= specifier shall appear. */
1850 if (open->file == NULL
1851 && (gfc_wide_strncasecmp (open->status->value.character.string,
1853 || gfc_wide_strncasecmp (open->status->value.character.string,
1856 char *s = gfc_widechar_to_char (open->status->value.character.string,
1858 warn_or_error ("The STATUS specified in OPEN statement at %C is "
1859 "'%s' and no FILE specifier is present", s);
1863 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
1864 the FILE= specifier shall not appear. */
1865 if (gfc_wide_strncasecmp (open->status->value.character.string,
1866 "scratch", 7) == 0 && open->file)
1868 warn_or_error ("The STATUS specified in OPEN statement at %C "
1869 "cannot have the value SCRATCH if a FILE specifier "
1874 /* Things that are not allowed for unformatted I/O. */
1875 if (open->form && open->form->expr_type == EXPR_CONSTANT
1876 && (open->delim || open->decimal || open->encoding || open->round
1877 || open->sign || open->pad || open->blank)
1878 && gfc_wide_strncasecmp (open->form->value.character.string,
1879 "unformatted", 11) == 0)
1881 const char *spec = (open->delim ? "DELIM "
1882 : (open->pad ? "PAD " : open->blank
1885 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
1886 "unformatted I/O", spec);
1889 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
1890 && gfc_wide_strncasecmp (open->access->value.character.string,
1893 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
1898 && open->access && open->access->expr_type == EXPR_CONSTANT
1899 && !(gfc_wide_strncasecmp (open->access->value.character.string,
1900 "sequential", 10) == 0
1901 || gfc_wide_strncasecmp (open->access->value.character.string,
1903 || gfc_wide_strncasecmp (open->access->value.character.string,
1906 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
1907 "for stream or sequential ACCESS");
1910 #undef warn_or_error
1912 new_st.op = EXEC_OPEN;
1913 new_st.ext.open = open;
1917 gfc_syntax_error (ST_OPEN);
1920 gfc_free_open (open);
1925 /* Free a gfc_close structure an all its expressions. */
1928 gfc_free_close (gfc_close *close)
1933 gfc_free_expr (close->unit);
1934 gfc_free_expr (close->iomsg);
1935 gfc_free_expr (close->iostat);
1936 gfc_free_expr (close->status);
1941 /* Match elements of a CLOSE statement. */
1944 match_close_element (gfc_close *close)
1948 m = match_etag (&tag_unit, &close->unit);
1951 m = match_etag (&tag_status, &close->status);
1954 m = match_out_tag (&tag_iomsg, &close->iomsg);
1957 m = match_out_tag (&tag_iostat, &close->iostat);
1960 m = match_ltag (&tag_err, &close->err);
1968 /* Match a CLOSE statement. */
1971 gfc_match_close (void)
1977 m = gfc_match_char ('(');
1981 close = XCNEW (gfc_close);
1983 m = match_close_element (close);
1985 if (m == MATCH_ERROR)
1989 m = gfc_match_expr (&close->unit);
1992 if (m == MATCH_ERROR)
1998 if (gfc_match_char (')') == MATCH_YES)
2000 if (gfc_match_char (',') != MATCH_YES)
2003 m = match_close_element (close);
2004 if (m == MATCH_ERROR)
2010 if (gfc_match_eos () == MATCH_NO)
2013 if (gfc_pure (NULL))
2015 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
2019 warn = (close->iostat || close->err) ? true : false;
2021 /* Checks on the STATUS specifier. */
2022 if (close->status && close->status->expr_type == EXPR_CONSTANT)
2024 static const char *status[] = { "KEEP", "DELETE", NULL };
2026 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2027 close->status->value.character.string,
2032 new_st.op = EXEC_CLOSE;
2033 new_st.ext.close = close;
2037 gfc_syntax_error (ST_CLOSE);
2040 gfc_free_close (close);
2045 /* Resolve everything in a gfc_close structure. */
2048 gfc_resolve_close (gfc_close *close)
2050 RESOLVE_TAG (&tag_unit, close->unit);
2051 RESOLVE_TAG (&tag_iomsg, close->iomsg);
2052 RESOLVE_TAG (&tag_iostat, close->iostat);
2053 RESOLVE_TAG (&tag_status, close->status);
2055 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
2062 /* Free a gfc_filepos structure. */
2065 gfc_free_filepos (gfc_filepos *fp)
2067 gfc_free_expr (fp->unit);
2068 gfc_free_expr (fp->iomsg);
2069 gfc_free_expr (fp->iostat);
2074 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
2077 match_file_element (gfc_filepos *fp)
2081 m = match_etag (&tag_unit, &fp->unit);
2084 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2087 m = match_out_tag (&tag_iostat, &fp->iostat);
2090 m = match_ltag (&tag_err, &fp->err);
2098 /* Match the second half of the file-positioning statements, REWIND,
2099 BACKSPACE, ENDFILE, or the FLUSH statement. */
2102 match_filepos (gfc_statement st, gfc_exec_op op)
2107 fp = XCNEW (gfc_filepos);
2109 if (gfc_match_char ('(') == MATCH_NO)
2111 m = gfc_match_expr (&fp->unit);
2112 if (m == MATCH_ERROR)
2120 m = match_file_element (fp);
2121 if (m == MATCH_ERROR)
2125 m = gfc_match_expr (&fp->unit);
2126 if (m == MATCH_ERROR)
2134 if (gfc_match_char (')') == MATCH_YES)
2136 if (gfc_match_char (',') != MATCH_YES)
2139 m = match_file_element (fp);
2140 if (m == MATCH_ERROR)
2147 if (gfc_match_eos () != MATCH_YES)
2150 if (gfc_pure (NULL))
2152 gfc_error ("%s statement not allowed in PURE procedure at %C",
2153 gfc_ascii_statement (st));
2159 new_st.ext.filepos = fp;
2163 gfc_syntax_error (st);
2166 gfc_free_filepos (fp);
2172 gfc_resolve_filepos (gfc_filepos *fp)
2174 RESOLVE_TAG (&tag_unit, fp->unit);
2175 RESOLVE_TAG (&tag_iostat, fp->iostat);
2176 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2177 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2184 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2185 and the FLUSH statement. */
2188 gfc_match_endfile (void)
2190 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2194 gfc_match_backspace (void)
2196 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2200 gfc_match_rewind (void)
2202 return match_filepos (ST_REWIND, EXEC_REWIND);
2206 gfc_match_flush (void)
2208 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2212 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2215 /******************** Data Transfer Statements *********************/
2217 /* Return a default unit number. */
2220 default_unit (io_kind k)
2229 return gfc_int_expr (unit);
2233 /* Match a unit specification for a data transfer statement. */
2236 match_dt_unit (io_kind k, gfc_dt *dt)
2240 if (gfc_match_char ('*') == MATCH_YES)
2242 if (dt->io_unit != NULL)
2245 dt->io_unit = default_unit (k);
2249 if (gfc_match_expr (&e) == MATCH_YES)
2251 if (dt->io_unit != NULL)
2264 gfc_error ("Duplicate UNIT specification at %C");
2269 /* Match a format specification. */
2272 match_dt_format (gfc_dt *dt)
2276 gfc_st_label *label;
2279 where = gfc_current_locus;
2281 if (gfc_match_char ('*') == MATCH_YES)
2283 if (dt->format_expr != NULL || dt->format_label != NULL)
2286 dt->format_label = &format_asterisk;
2290 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2292 if (dt->format_expr != NULL || dt->format_label != NULL)
2294 gfc_free_st_label (label);
2298 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2301 dt->format_label = label;
2304 else if (m == MATCH_ERROR)
2305 /* The label was zero or too large. Emit the correct diagnosis. */
2308 if (gfc_match_expr (&e) == MATCH_YES)
2310 if (dt->format_expr != NULL || dt->format_label != NULL)
2315 dt->format_expr = e;
2319 gfc_current_locus = where; /* The only case where we have to restore */
2324 gfc_error ("Duplicate format specification at %C");
2329 /* Traverse a namelist that is part of a READ statement to make sure
2330 that none of the variables in the namelist are INTENT(IN). Returns
2331 nonzero if we find such a variable. */
2334 check_namelist (gfc_symbol *sym)
2338 for (p = sym->namelist; p; p = p->next)
2339 if (p->sym->attr.intent == INTENT_IN)
2341 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2342 p->sym->name, sym->name);
2350 /* Match a single data transfer element. */
2353 match_dt_element (io_kind k, gfc_dt *dt)
2355 char name[GFC_MAX_SYMBOL_LEN + 1];
2359 if (gfc_match (" unit =") == MATCH_YES)
2361 m = match_dt_unit (k, dt);
2366 if (gfc_match (" fmt =") == MATCH_YES)
2368 m = match_dt_format (dt);
2373 if (gfc_match (" nml = %n", name) == MATCH_YES)
2375 if (dt->namelist != NULL)
2377 gfc_error ("Duplicate NML specification at %C");
2381 if (gfc_find_symbol (name, NULL, 1, &sym))
2384 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2386 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2387 sym != NULL ? sym->name : name);
2392 if (k == M_READ && check_namelist (sym))
2398 m = match_etag (&tag_e_async, &dt->asynchronous);
2401 m = match_etag (&tag_e_blank, &dt->blank);
2404 m = match_etag (&tag_e_delim, &dt->delim);
2407 m = match_etag (&tag_e_pad, &dt->pad);
2410 m = match_etag (&tag_e_sign, &dt->sign);
2413 m = match_etag (&tag_e_round, &dt->round);
2416 m = match_out_tag (&tag_id, &dt->id);
2419 m = match_etag (&tag_e_decimal, &dt->decimal);
2422 m = match_etag (&tag_rec, &dt->rec);
2425 m = match_etag (&tag_spos, &dt->pos);
2428 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2431 m = match_out_tag (&tag_iostat, &dt->iostat);
2434 m = match_ltag (&tag_err, &dt->err);
2436 dt->err_where = gfc_current_locus;
2439 m = match_etag (&tag_advance, &dt->advance);
2442 m = match_out_tag (&tag_size, &dt->size);
2446 m = match_ltag (&tag_end, &dt->end);
2451 gfc_error ("END tag at %C not allowed in output statement");
2454 dt->end_where = gfc_current_locus;
2459 m = match_ltag (&tag_eor, &dt->eor);
2461 dt->eor_where = gfc_current_locus;
2469 /* Free a data transfer structure and everything below it. */
2472 gfc_free_dt (gfc_dt *dt)
2477 gfc_free_expr (dt->io_unit);
2478 gfc_free_expr (dt->format_expr);
2479 gfc_free_expr (dt->rec);
2480 gfc_free_expr (dt->advance);
2481 gfc_free_expr (dt->iomsg);
2482 gfc_free_expr (dt->iostat);
2483 gfc_free_expr (dt->size);
2484 gfc_free_expr (dt->pad);
2485 gfc_free_expr (dt->delim);
2486 gfc_free_expr (dt->sign);
2487 gfc_free_expr (dt->round);
2488 gfc_free_expr (dt->blank);
2489 gfc_free_expr (dt->decimal);
2490 gfc_free_expr (dt->extra_comma);
2491 gfc_free_expr (dt->pos);
2496 /* Resolve everything in a gfc_dt structure. */
2499 gfc_resolve_dt (gfc_dt *dt)
2503 RESOLVE_TAG (&tag_format, dt->format_expr);
2504 RESOLVE_TAG (&tag_rec, dt->rec);
2505 RESOLVE_TAG (&tag_spos, dt->pos);
2506 RESOLVE_TAG (&tag_advance, dt->advance);
2507 RESOLVE_TAG (&tag_id, dt->id);
2508 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2509 RESOLVE_TAG (&tag_iostat, dt->iostat);
2510 RESOLVE_TAG (&tag_size, dt->size);
2511 RESOLVE_TAG (&tag_e_pad, dt->pad);
2512 RESOLVE_TAG (&tag_e_delim, dt->delim);
2513 RESOLVE_TAG (&tag_e_sign, dt->sign);
2514 RESOLVE_TAG (&tag_e_round, dt->round);
2515 RESOLVE_TAG (&tag_e_blank, dt->blank);
2516 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2517 RESOLVE_TAG (&tag_e_async, dt->asynchronous);
2520 if (gfc_resolve_expr (e) == SUCCESS
2521 && (e->ts.type != BT_INTEGER
2522 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2524 /* If there is no extra comma signifying the "format" form of the IO
2525 statement, then this must be an error. */
2526 if (!dt->extra_comma)
2528 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2529 "or a CHARACTER variable", &e->where);
2534 /* At this point, we have an extra comma. If io_unit has arrived as
2535 type character, we assume its really the "format" form of the I/O
2536 statement. We set the io_unit to the default unit and format to
2537 the character expression. See F95 Standard section 9.4. */
2539 k = dt->extra_comma->value.iokind;
2540 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2542 dt->format_expr = dt->io_unit;
2543 dt->io_unit = default_unit (k);
2545 /* Free this pointer now so that a warning/error is not triggered
2546 below for the "Extension". */
2547 gfc_free_expr (dt->extra_comma);
2548 dt->extra_comma = NULL;
2553 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2554 &dt->extra_comma->where);
2560 if (e->ts.type == BT_CHARACTER)
2562 if (gfc_has_vector_index (e))
2564 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2569 if (e->rank && e->ts.type != BT_CHARACTER)
2571 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2576 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2577 "item list at %L", &dt->extra_comma->where) == FAILURE)
2582 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2584 if (dt->err->defined == ST_LABEL_UNKNOWN)
2586 gfc_error ("ERR tag label %d at %L not defined",
2587 dt->err->value, &dt->err_where);
2594 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2596 if (dt->end->defined == ST_LABEL_UNKNOWN)
2598 gfc_error ("END tag label %d at %L not defined",
2599 dt->end->value, &dt->end_where);
2606 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2608 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2610 gfc_error ("EOR tag label %d at %L not defined",
2611 dt->eor->value, &dt->eor_where);
2616 /* Check the format label actually exists. */
2617 if (dt->format_label && dt->format_label != &format_asterisk
2618 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2620 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2621 &dt->format_label->where);
2628 /* Given an io_kind, return its name. */
2631 io_kind_name (io_kind k)
2650 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2657 /* Match an IO iteration statement of the form:
2659 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2661 which is equivalent to a single IO element. This function is
2662 mutually recursive with match_io_element(). */
2664 static match match_io_element (io_kind, gfc_code **);
2667 match_io_iterator (io_kind k, gfc_code **result)
2669 gfc_code *head, *tail, *new_code;
2677 old_loc = gfc_current_locus;
2679 if (gfc_match_char ('(') != MATCH_YES)
2682 m = match_io_element (k, &head);
2685 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2691 /* Can't be anything but an IO iterator. Build a list. */
2692 iter = gfc_get_iterator ();
2696 m = gfc_match_iterator (iter, 0);
2697 if (m == MATCH_ERROR)
2701 gfc_check_do_variable (iter->var->symtree);
2705 m = match_io_element (k, &new_code);
2706 if (m == MATCH_ERROR)
2715 tail = gfc_append_code (tail, new_code);
2717 if (gfc_match_char (',') != MATCH_YES)
2726 if (gfc_match_char (')') != MATCH_YES)
2729 new_code = gfc_get_code ();
2730 new_code->op = EXEC_DO;
2731 new_code->ext.iterator = iter;
2733 new_code->block = gfc_get_code ();
2734 new_code->block->op = EXEC_DO;
2735 new_code->block->next = head;
2741 gfc_error ("Syntax error in I/O iterator at %C");
2745 gfc_free_iterator (iter, 1);
2746 gfc_free_statements (head);
2747 gfc_current_locus = old_loc;
2752 /* Match a single element of an IO list, which is either a single
2753 expression or an IO Iterator. */
2756 match_io_element (io_kind k, gfc_code **cpp)
2764 m = match_io_iterator (k, cpp);
2770 m = gfc_match_variable (&expr, 0);
2772 gfc_error ("Expected variable in READ statement at %C");
2776 m = gfc_match_expr (&expr);
2778 gfc_error ("Expected expression in %s statement at %C",
2786 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2788 gfc_error ("Variable '%s' in input list at %C cannot be "
2789 "INTENT(IN)", expr->symtree->n.sym->name);
2794 && gfc_impure_variable (expr->symtree->n.sym)
2795 && current_dt->io_unit->ts.type == BT_CHARACTER)
2797 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2798 expr->symtree->n.sym->name);
2802 if (gfc_check_do_variable (expr->symtree))
2808 if (current_dt->io_unit->ts.type == BT_CHARACTER
2810 && current_dt->io_unit->expr_type == EXPR_VARIABLE
2811 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
2813 gfc_error ("Cannot write to internal file unit '%s' at %C "
2814 "inside a PURE procedure",
2815 current_dt->io_unit->symtree->n.sym->name);
2827 gfc_free_expr (expr);
2831 cp = gfc_get_code ();
2832 cp->op = EXEC_TRANSFER;
2840 /* Match an I/O list, building gfc_code structures as we go. */
2843 match_io_list (io_kind k, gfc_code **head_p)
2845 gfc_code *head, *tail, *new_code;
2848 *head_p = head = tail = NULL;
2849 if (gfc_match_eos () == MATCH_YES)
2854 m = match_io_element (k, &new_code);
2855 if (m == MATCH_ERROR)
2860 tail = gfc_append_code (tail, new_code);
2864 if (gfc_match_eos () == MATCH_YES)
2866 if (gfc_match_char (',') != MATCH_YES)
2874 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2877 gfc_free_statements (head);
2882 /* Attach the data transfer end node. */
2885 terminate_io (gfc_code *io_code)
2889 if (io_code == NULL)
2890 io_code = new_st.block;
2892 c = gfc_get_code ();
2893 c->op = EXEC_DT_END;
2895 /* Point to structure that is already there */
2896 c->ext.dt = new_st.ext.dt;
2897 gfc_append_code (io_code, c);
2901 /* Check the constraints for a data transfer statement. The majority of the
2902 constraints appearing in 9.4 of the standard appear here. Some are handled
2903 in resolve_tag and others in gfc_resolve_dt. */
2906 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
2909 #define io_constraint(condition,msg,arg)\
2912 gfc_error(msg,arg);\
2918 gfc_symbol *sym = NULL;
2919 bool warn, unformatted;
2921 warn = (dt->err || dt->iostat) ? true : false;
2922 unformatted = dt->format_expr == NULL && dt->format_label == NULL
2923 && dt->namelist == NULL;
2928 if (expr && expr->expr_type == EXPR_VARIABLE
2929 && expr->ts.type == BT_CHARACTER)
2931 sym = expr->symtree->n.sym;
2933 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
2934 "Internal file at %L must not be INTENT(IN)",
2937 io_constraint (gfc_has_vector_index (dt->io_unit),
2938 "Internal file incompatible with vector subscript at %L",
2941 io_constraint (dt->rec != NULL,
2942 "REC tag at %L is incompatible with internal file",
2945 io_constraint (dt->pos != NULL,
2946 "POS tag at %L is incompatible with internal file",
2949 io_constraint (unformatted,
2950 "Unformatted I/O not allowed with internal unit at %L",
2951 &dt->io_unit->where);
2953 io_constraint (dt->asynchronous != NULL,
2954 "ASYNCHRONOUS tag at %L not allowed with internal file",
2955 &dt->asynchronous->where);
2957 if (dt->namelist != NULL)
2959 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
2960 "at %L with namelist", &expr->where)
2965 io_constraint (dt->advance != NULL,
2966 "ADVANCE tag at %L is incompatible with internal file",
2967 &dt->advance->where);
2970 if (expr && expr->ts.type != BT_CHARACTER)
2973 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
2974 "IO UNIT in %s statement at %C must be "
2975 "an internal file in a PURE procedure",
2981 io_constraint (dt->end, "END tag not allowed with output at %L",
2984 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
2987 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
2990 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
2993 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
2998 io_constraint (dt->size && dt->advance == NULL,
2999 "SIZE tag at %L requires an ADVANCE tag",
3002 io_constraint (dt->eor && dt->advance == NULL,
3003 "EOR tag at %L requires an ADVANCE tag",
3007 if (dt->asynchronous)
3009 static const char * asynchronous[] = { "YES", "NO", NULL };
3011 if (gfc_reduce_init_expr (dt->asynchronous) != SUCCESS)
3013 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
3014 "expression", &dt->asynchronous->where);
3018 if (!compare_to_allowed_values
3019 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
3020 dt->asynchronous->value.character.string,
3021 io_kind_name (k), warn))
3029 || gfc_wide_strlen (dt->asynchronous->value.character.string) != 3
3030 || gfc_wide_strncasecmp (dt->asynchronous->value.character.string,
3032 io_constraint (not_yes,
3033 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
3034 "specifier", &dt->id->where);
3039 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
3040 "not allowed in Fortran 95") == FAILURE)
3043 if (dt->decimal->expr_type == EXPR_CONSTANT)
3045 static const char * decimal[] = { "COMMA", "POINT", NULL };
3047 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
3048 dt->decimal->value.character.string,
3049 io_kind_name (k), warn))
3052 io_constraint (unformatted,
3053 "the DECIMAL= specifier at %L must be with an "
3054 "explicit format expression", &dt->decimal->where);
3060 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
3061 "not allowed in Fortran 95") == FAILURE)
3064 if (dt->blank->expr_type == EXPR_CONSTANT)
3066 static const char * blank[] = { "NULL", "ZERO", NULL };
3068 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
3069 dt->blank->value.character.string,
3070 io_kind_name (k), warn))
3073 io_constraint (unformatted,
3074 "the BLANK= specifier at %L must be with an "
3075 "explicit format expression", &dt->blank->where);
3081 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
3082 "not allowed in Fortran 95") == FAILURE)
3085 if (dt->pad->expr_type == EXPR_CONSTANT)
3087 static const char * pad[] = { "YES", "NO", NULL };
3089 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3090 dt->pad->value.character.string,
3091 io_kind_name (k), warn))
3094 io_constraint (unformatted,
3095 "the PAD= specifier at %L must be with an "
3096 "explicit format expression", &dt->pad->where);
3102 /* When implemented, change the following to use gfc_notify_std F2003.
3103 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3104 "not allowed in Fortran 95") == FAILURE)
3105 return MATCH_ERROR; */
3106 gfc_error ("F2003 Feature: ROUND= specifier at %C not implemented");
3109 if (dt->round->expr_type == EXPR_CONSTANT)
3111 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3112 "COMPATIBLE", "PROCESSOR_DEFINED",
3115 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3116 dt->round->value.character.string,
3117 io_kind_name (k), warn))
3124 /* When implemented, change the following to use gfc_notify_std F2003.
3125 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3126 "not allowed in Fortran 95") == FAILURE)
3127 return MATCH_ERROR; */
3128 if (dt->sign->expr_type == EXPR_CONSTANT)
3130 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3133 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3134 dt->sign->value.character.string,
3135 io_kind_name (k), warn))
3138 io_constraint (unformatted,
3139 "SIGN= specifier at %L must be with an "
3140 "explicit format expression", &dt->sign->where);
3142 io_constraint (k == M_READ,
3143 "SIGN= specifier at %L not allowed in a "
3144 "READ statement", &dt->sign->where);
3150 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3151 "not allowed in Fortran 95") == FAILURE)
3154 if (dt->delim->expr_type == EXPR_CONSTANT)
3156 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3158 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3159 dt->delim->value.character.string,
3160 io_kind_name (k), warn))
3163 io_constraint (k == M_READ,
3164 "DELIM= specifier at %L not allowed in a "
3165 "READ statement", &dt->delim->where);
3167 io_constraint (dt->format_label != &format_asterisk
3168 && dt->namelist == NULL,
3169 "DELIM= specifier at %L must have FMT=*",
3172 io_constraint (unformatted && dt->namelist == NULL,
3173 "DELIM= specifier at %L must be with FMT=* or "
3174 "NML= specifier ", &dt->delim->where);
3180 io_constraint (io_code && dt->namelist,
3181 "NAMELIST cannot be followed by IO-list at %L",
3184 io_constraint (dt->format_expr,
3185 "IO spec-list cannot contain both NAMELIST group name "
3186 "and format specification at %L",
3187 &dt->format_expr->where);
3189 io_constraint (dt->format_label,
3190 "IO spec-list cannot contain both NAMELIST group name "
3191 "and format label at %L", spec_end);
3193 io_constraint (dt->rec,
3194 "NAMELIST IO is not allowed with a REC= specifier "
3195 "at %L", &dt->rec->where);
3197 io_constraint (dt->advance,
3198 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3199 "at %L", &dt->advance->where);
3204 io_constraint (dt->end,
3205 "An END tag is not allowed with a "
3206 "REC= specifier at %L", &dt->end_where);
3208 io_constraint (dt->format_label == &format_asterisk,
3209 "FMT=* is not allowed with a REC= specifier "
3212 io_constraint (dt->pos,
3213 "POS= is not allowed with REC= specifier "
3214 "at %L", &dt->pos->where);
3219 int not_yes, not_no;
3222 io_constraint (dt->format_label == &format_asterisk,
3223 "List directed format(*) is not allowed with a "
3224 "ADVANCE= specifier at %L.", &expr->where);
3226 io_constraint (unformatted,
3227 "the ADVANCE= specifier at %L must appear with an "
3228 "explicit format expression", &expr->where);
3230 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3232 const gfc_char_t *advance = expr->value.character.string;
3233 not_no = gfc_wide_strlen (advance) != 2
3234 || gfc_wide_strncasecmp (advance, "no", 2) != 0;
3235 not_yes = gfc_wide_strlen (advance) != 3
3236 || gfc_wide_strncasecmp (advance, "yes", 3) != 0;
3244 io_constraint (not_no && not_yes,
3245 "ADVANCE= specifier at %L must have value = "
3246 "YES or NO.", &expr->where);
3248 io_constraint (dt->size && not_no && k == M_READ,
3249 "SIZE tag at %L requires an ADVANCE = 'NO'",
3252 io_constraint (dt->eor && not_no && k == M_READ,
3253 "EOR tag at %L requires an ADVANCE = 'NO'",
3257 expr = dt->format_expr;
3258 if (gfc_simplify_expr (expr, 0) == FAILURE
3259 || check_format_string (expr, k == M_READ) == FAILURE)
3264 #undef io_constraint
3267 /* Match a READ, WRITE or PRINT statement. */
3270 match_io (io_kind k)
3272 char name[GFC_MAX_SYMBOL_LEN + 1];
3281 where = gfc_current_locus;
3283 current_dt = dt = XCNEW (gfc_dt);
3284 m = gfc_match_char ('(');
3287 where = gfc_current_locus;
3290 else if (k == M_PRINT)
3292 /* Treat the non-standard case of PRINT namelist. */
3293 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3294 && gfc_match_name (name) == MATCH_YES)
3296 gfc_find_symbol (name, NULL, 1, &sym);
3297 if (sym && sym->attr.flavor == FL_NAMELIST)
3299 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3300 "%C is an extension") == FAILURE)
3306 dt->io_unit = default_unit (k);
3311 gfc_current_locus = where;
3315 if (gfc_current_form == FORM_FREE)
3317 char c = gfc_peek_ascii_char ();
3318 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3325 m = match_dt_format (dt);
3326 if (m == MATCH_ERROR)
3332 dt->io_unit = default_unit (k);
3337 /* Before issuing an error for a malformed 'print (1,*)' type of
3338 error, check for a default-char-expr of the form ('(I0)'). */
3339 if (k == M_PRINT && m == MATCH_YES)
3341 /* Reset current locus to get the initial '(' in an expression. */
3342 gfc_current_locus = where;
3343 dt->format_expr = NULL;
3344 m = match_dt_format (dt);
3346 if (m == MATCH_ERROR)
3348 if (m == MATCH_NO || dt->format_expr == NULL)
3352 dt->io_unit = default_unit (k);
3357 /* Match a control list */
3358 if (match_dt_element (k, dt) == MATCH_YES)
3360 if (match_dt_unit (k, dt) != MATCH_YES)
3363 if (gfc_match_char (')') == MATCH_YES)
3365 if (gfc_match_char (',') != MATCH_YES)
3368 m = match_dt_element (k, dt);
3371 if (m == MATCH_ERROR)
3374 m = match_dt_format (dt);
3377 if (m == MATCH_ERROR)
3380 where = gfc_current_locus;
3382 m = gfc_match_name (name);
3385 gfc_find_symbol (name, NULL, 1, &sym);
3386 if (sym && sym->attr.flavor == FL_NAMELIST)
3389 if (k == M_READ && check_namelist (sym))
3398 gfc_current_locus = where;
3400 goto loop; /* No matches, try regular elements */
3403 if (gfc_match_char (')') == MATCH_YES)
3405 if (gfc_match_char (',') != MATCH_YES)
3411 m = match_dt_element (k, dt);
3414 if (m == MATCH_ERROR)
3417 if (gfc_match_char (')') == MATCH_YES)
3419 if (gfc_match_char (',') != MATCH_YES)
3425 /* Used in check_io_constraints, where no locus is available. */
3426 spec_end = gfc_current_locus;
3428 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3429 to save the locus. This is used later when resolving transfer statements
3430 that might have a format expression without unit number. */
3431 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3433 dt->extra_comma = gfc_get_expr ();
3435 /* Set the types to something compatible with iokind. This is needed to
3436 get through gfc_free_expr later since iokind really has no Basic Type,
3438 dt->extra_comma->expr_type = EXPR_CONSTANT;
3439 dt->extra_comma->ts.type = BT_LOGICAL;
3441 /* Save the iokind and locus for later use in resolution. */
3442 dt->extra_comma->value.iokind = k;
3443 dt->extra_comma->where = gfc_current_locus;
3447 if (gfc_match_eos () != MATCH_YES)
3449 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3451 gfc_error ("Expected comma in I/O list at %C");
3456 m = match_io_list (k, &io_code);
3457 if (m == MATCH_ERROR)
3463 /* A full IO statement has been matched. Check the constraints. spec_end is
3464 supplied for cases where no locus is supplied. */
3465 m = check_io_constraints (k, dt, io_code, &spec_end);
3467 if (m == MATCH_ERROR)
3470 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3472 new_st.block = gfc_get_code ();
3473 new_st.block->op = new_st.op;
3474 new_st.block->next = io_code;
3476 terminate_io (io_code);
3481 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3491 gfc_match_read (void)
3493 return match_io (M_READ);
3498 gfc_match_write (void)
3500 return match_io (M_WRITE);
3505 gfc_match_print (void)
3509 m = match_io (M_PRINT);
3513 if (gfc_pure (NULL))
3515 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3523 /* Free a gfc_inquire structure. */
3526 gfc_free_inquire (gfc_inquire *inquire)
3529 if (inquire == NULL)
3532 gfc_free_expr (inquire->unit);
3533 gfc_free_expr (inquire->file);
3534 gfc_free_expr (inquire->iomsg);
3535 gfc_free_expr (inquire->iostat);
3536 gfc_free_expr (inquire->exist);
3537 gfc_free_expr (inquire->opened);
3538 gfc_free_expr (inquire->number);
3539 gfc_free_expr (inquire->named);
3540 gfc_free_expr (inquire->name);
3541 gfc_free_expr (inquire->access);
3542 gfc_free_expr (inquire->sequential);
3543 gfc_free_expr (inquire->direct);
3544 gfc_free_expr (inquire->form);
3545 gfc_free_expr (inquire->formatted);
3546 gfc_free_expr (inquire->unformatted);
3547 gfc_free_expr (inquire->recl);
3548 gfc_free_expr (inquire->nextrec);
3549 gfc_free_expr (inquire->blank);
3550 gfc_free_expr (inquire->position);
3551 gfc_free_expr (inquire->action);
3552 gfc_free_expr (inquire->read);
3553 gfc_free_expr (inquire->write);
3554 gfc_free_expr (inquire->readwrite);
3555 gfc_free_expr (inquire->delim);
3556 gfc_free_expr (inquire->encoding);
3557 gfc_free_expr (inquire->pad);
3558 gfc_free_expr (inquire->iolength);
3559 gfc_free_expr (inquire->convert);
3560 gfc_free_expr (inquire->strm_pos);
3561 gfc_free_expr (inquire->asynchronous);
3562 gfc_free_expr (inquire->decimal);
3563 gfc_free_expr (inquire->pending);
3564 gfc_free_expr (inquire->id);
3565 gfc_free_expr (inquire->sign);
3566 gfc_free_expr (inquire->size);
3567 gfc_free_expr (inquire->round);
3572 /* Match an element of an INQUIRE statement. */
3574 #define RETM if (m != MATCH_NO) return m;
3577 match_inquire_element (gfc_inquire *inquire)
3581 m = match_etag (&tag_unit, &inquire->unit);
3582 RETM m = match_etag (&tag_file, &inquire->file);
3583 RETM m = match_ltag (&tag_err, &inquire->err);
3584 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3585 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3586 RETM m = match_vtag (&tag_exist, &inquire->exist);
3587 RETM m = match_vtag (&tag_opened, &inquire->opened);
3588 RETM m = match_vtag (&tag_named, &inquire->named);
3589 RETM m = match_vtag (&tag_name, &inquire->name);
3590 RETM m = match_out_tag (&tag_number, &inquire->number);
3591 RETM m = match_vtag (&tag_s_access, &inquire->access);
3592 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3593 RETM m = match_vtag (&tag_direct, &inquire->direct);
3594 RETM m = match_vtag (&tag_s_form, &inquire->form);
3595 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3596 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3597 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3598 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3599 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3600 RETM m = match_vtag (&tag_s_position, &inquire->position);
3601 RETM m = match_vtag (&tag_s_action, &inquire->action);
3602 RETM m = match_vtag (&tag_read, &inquire->read);
3603 RETM m = match_vtag (&tag_write, &inquire->write);
3604 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3605 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3606 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3607 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3608 RETM m = match_vtag (&tag_size, &inquire->size);
3609 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3610 RETM m = match_vtag (&tag_s_round, &inquire->round);
3611 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3612 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3613 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3614 RETM m = match_vtag (&tag_convert, &inquire->convert);
3615 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3616 RETM m = match_vtag (&tag_pending, &inquire->pending);
3617 RETM m = match_vtag (&tag_id, &inquire->id);
3618 RETM return MATCH_NO;
3625 gfc_match_inquire (void)
3627 gfc_inquire *inquire;
3632 m = gfc_match_char ('(');
3636 inquire = XCNEW (gfc_inquire);
3638 loc = gfc_current_locus;
3640 m = match_inquire_element (inquire);
3641 if (m == MATCH_ERROR)
3645 m = gfc_match_expr (&inquire->unit);
3646 if (m == MATCH_ERROR)
3652 /* See if we have the IOLENGTH form of the inquire statement. */
3653 if (inquire->iolength != NULL)
3655 if (gfc_match_char (')') != MATCH_YES)
3658 m = match_io_list (M_INQUIRE, &code);
3659 if (m == MATCH_ERROR)
3664 new_st.op = EXEC_IOLENGTH;
3665 new_st.expr = inquire->iolength;
3666 new_st.ext.inquire = inquire;
3668 if (gfc_pure (NULL))
3670 gfc_free_statements (code);
3671 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3675 new_st.block = gfc_get_code ();
3676 new_st.block->op = EXEC_IOLENGTH;
3677 terminate_io (code);
3678 new_st.block->next = code;
3682 /* At this point, we have the non-IOLENGTH inquire statement. */
3685 if (gfc_match_char (')') == MATCH_YES)
3687 if (gfc_match_char (',') != MATCH_YES)
3690 m = match_inquire_element (inquire);
3691 if (m == MATCH_ERROR)
3696 if (inquire->iolength != NULL)
3698 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3703 if (gfc_match_eos () != MATCH_YES)
3706 if (inquire->unit != NULL && inquire->file != NULL)
3708 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3709 "UNIT specifiers", &loc);
3713 if (inquire->unit == NULL && inquire->file == NULL)
3715 gfc_error ("INQUIRE statement at %L requires either FILE or "
3716 "UNIT specifier", &loc);
3720 if (gfc_pure (NULL))
3722 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3726 if (inquire->id != NULL && inquire->pending == NULL)
3728 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
3729 "the ID= specifier", &loc);
3733 new_st.op = EXEC_INQUIRE;
3734 new_st.ext.inquire = inquire;
3738 gfc_syntax_error (ST_INQUIRE);
3741 gfc_free_inquire (inquire);
3746 /* Resolve everything in a gfc_inquire structure. */
3749 gfc_resolve_inquire (gfc_inquire *inquire)
3751 RESOLVE_TAG (&tag_unit, inquire->unit);
3752 RESOLVE_TAG (&tag_file, inquire->file);
3753 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3754 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3755 RESOLVE_TAG (&tag_exist, inquire->exist);
3756 RESOLVE_TAG (&tag_opened, inquire->opened);
3757 RESOLVE_TAG (&tag_number, inquire->number);
3758 RESOLVE_TAG (&tag_named, inquire->named);
3759 RESOLVE_TAG (&tag_name, inquire->name);
3760 RESOLVE_TAG (&tag_s_access, inquire->access);
3761 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3762 RESOLVE_TAG (&tag_direct, inquire->direct);
3763 RESOLVE_TAG (&tag_s_form, inquire->form);
3764 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3765 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3766 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3767 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3768 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3769 RESOLVE_TAG (&tag_s_position, inquire->position);
3770 RESOLVE_TAG (&tag_s_action, inquire->action);
3771 RESOLVE_TAG (&tag_read, inquire->read);
3772 RESOLVE_TAG (&tag_write, inquire->write);
3773 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3774 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3775 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3776 RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
3777 RESOLVE_TAG (&tag_s_round, inquire->round);
3778 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3779 RESOLVE_TAG (&tag_convert, inquire->convert);
3780 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3781 RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
3782 RESOLVE_TAG (&tag_s_sign, inquire->sign);
3783 RESOLVE_TAG (&tag_s_round, inquire->round);
3784 RESOLVE_TAG (&tag_pending, inquire->pending);
3785 RESOLVE_TAG (&tag_size, inquire->size);
3786 RESOLVE_TAG (&tag_id, inquire->id);
3788 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
3796 gfc_free_wait (gfc_wait *wait)
3801 gfc_free_expr (wait->unit);
3802 gfc_free_expr (wait->iostat);
3803 gfc_free_expr (wait->iomsg);
3804 gfc_free_expr (wait->id);
3809 gfc_resolve_wait (gfc_wait *wait)
3811 RESOLVE_TAG (&tag_unit, wait->unit);
3812 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
3813 RESOLVE_TAG (&tag_iostat, wait->iostat);
3814 RESOLVE_TAG (&tag_id, wait->id);
3816 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
3819 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
3825 /* Match an element of a WAIT statement. */
3827 #define RETM if (m != MATCH_NO) return m;
3830 match_wait_element (gfc_wait *wait)
3834 m = match_etag (&tag_unit, &wait->unit);
3835 RETM m = match_ltag (&tag_err, &wait->err);
3836 RETM m = match_ltag (&tag_end, &wait->eor);
3837 RETM m = match_ltag (&tag_eor, &wait->end);
3838 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
3839 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
3840 RETM m = match_etag (&tag_id, &wait->id);
3841 RETM return MATCH_NO;
3848 gfc_match_wait (void)
3854 m = gfc_match_char ('(');
3858 wait = XCNEW (gfc_wait);
3860 loc = gfc_current_locus;
3862 m = match_wait_element (wait);
3863 if (m == MATCH_ERROR)
3867 m = gfc_match_expr (&wait->unit);
3868 if (m == MATCH_ERROR)
3876 if (gfc_match_char (')') == MATCH_YES)
3878 if (gfc_match_char (',') != MATCH_YES)
3881 m = match_wait_element (wait);
3882 if (m == MATCH_ERROR)
3888 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
3889 "not allowed in Fortran 95") == FAILURE)
3892 if (gfc_pure (NULL))
3894 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
3898 new_st.op = EXEC_WAIT;
3899 new_st.ext.wait = wait;
3904 gfc_syntax_error (ST_WAIT);
3907 gfc_free_wait (wait);