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_POS, 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,
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_length, use_last_char;
122 static char error_element;
123 static locus format_locus;
125 static format_token saved_token;
128 { MODE_STRING, MODE_FORMAT, MODE_COPY }
132 /* Return the next character in the format string. */
135 next_char (int in_string)
147 if (mode == MODE_STRING)
148 c = *format_string++;
151 c = gfc_next_char_literal (in_string);
156 if (gfc_option.flag_backslash && c == '\\')
158 locus old_locus = gfc_current_locus;
160 if (gfc_match_special_char (&c) == MATCH_NO)
161 gfc_current_locus = old_locus;
163 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
164 gfc_warning ("Extension: backslash character at %C");
167 if (mode == MODE_COPY)
168 *format_string++ = c;
170 if (mode != MODE_STRING)
171 format_locus = gfc_current_locus;
173 c = gfc_wide_toupper (c);
178 /* Back up one character position. Only works once. */
186 /* Eat up the spaces and return a character. */
189 next_char_not_space (bool *error)
194 error_element = c = next_char (0);
197 if (gfc_option.allow_std & GFC_STD_GNU)
198 gfc_warning ("Extension: Tab character in format at %C");
201 gfc_error ("Extension: Tab character in format at %C");
207 while (gfc_is_whitespace (c));
211 static int value = 0;
213 /* Simple lexical analyzer for getting the next token in a FORMAT
225 if (saved_token != FMT_NONE)
228 saved_token = FMT_NONE;
232 c = next_char_not_space (&error);
240 c = next_char_not_space (&error);
251 c = next_char_not_space (&error);
253 value = 10 * value + c - '0';
262 token = FMT_SIGNED_INT;
281 c = next_char_not_space (&error);
284 value = 10 * value + c - '0';
292 token = zflag ? FMT_ZERO : FMT_POSINT;
316 c = next_char_not_space (&error);
317 if (c != 'L' && c != 'R')
336 c = next_char_not_space (&error);
337 if (c != 'P' && c != 'S')
344 c = next_char_not_space (&error);
345 if (c == 'N' || c == 'Z')
406 c = next_char_not_space (&error);
407 if (c == 'N' || c == 'S')
434 c = next_char_not_space (&error);
437 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
438 "specifier not allowed at %C") == FAILURE)
444 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
445 "specifier not allowed at %C") == FAILURE)
472 /* Check a format statement. The format string, either from a FORMAT
473 statement or a constant in an I/O statement has already been parsed
474 by itself, and we are checking it for validity. The dual origin
475 means that the warning message is a little less than great. */
478 check_format (bool is_input)
480 const char *posint_required = _("Positive width required");
481 const char *nonneg_required = _("Nonnegative width required");
482 const char *unexpected_element = _("Unexpected element '%c' in format string"
484 const char *unexpected_end = _("Unexpected end of format string");
485 const char *zero_width = _("Zero width in format descriptor");
494 saved_token = FMT_NONE;
504 error = _("Missing leading left parenthesis");
512 goto finished; /* Empty format is legal */
516 /* In this state, the next thing has to be a format item. */
545 /* Signed integer can only precede a P format. */
551 error = _("Expected P edit descriptor");
558 /* P requires a prior number. */
559 error = _("P descriptor requires leading scale factor");
563 /* X requires a prior number if we're being pedantic. */
564 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
565 "requires leading space count at %C")
577 goto extension_optional_comma;
588 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %C")
591 if (t != FMT_RPAREN || level > 0)
593 gfc_warning ("$ should be the last specifier in format at %C");
594 goto optional_comma_1;
612 error = unexpected_end;
616 error = unexpected_element;
621 /* In this state, t must currently be a data descriptor.
622 Deal with things that can/must follow the descriptor. */
640 error = _("Repeat count cannot follow P descriptor");
657 switch (gfc_notification_std (GFC_STD_GNU))
660 gfc_warning ("Extension: Missing positive width after L "
666 error = posint_required;
696 if (t == FMT_G && u == FMT_ZERO)
703 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: 'G0' in "
704 "format at %C") == FAILURE)
718 error = posint_required;
729 /* Warn if -std=legacy, otherwise error. */
730 if (gfc_option.warn_std != 0)
731 gfc_error_now ("Period required in format specifier at %C");
733 gfc_warning ("Period required in format specifier at %C");
741 if (u != FMT_ZERO && u != FMT_POSINT)
743 error = nonneg_required;
750 /* Look for optional exponent. */
765 error = _("Positive exponent width required");
776 if (t != FMT_ZERO && t != FMT_POSINT)
778 error = nonneg_required;
781 else if (is_input && t == FMT_ZERO)
783 error = posint_required;
792 /* Warn if -std=legacy, otherwise error. */
793 if (gfc_option.warn_std != 0)
794 gfc_error_now ("Period required in format specifier at %C");
796 gfc_warning ("Period required in format specifier at %C");
804 if (t != FMT_ZERO && t != FMT_POSINT)
806 error = nonneg_required;
813 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
814 gfc_warning ("The H format specifier at %C is"
815 " a Fortran 95 deleted feature");
817 if (mode == MODE_STRING)
819 format_string += value;
820 format_length -= value;
836 if (t != FMT_ZERO && t != FMT_POSINT)
838 error = nonneg_required;
841 else if (is_input && t == FMT_ZERO)
843 error = posint_required;
859 if (t != FMT_ZERO && t != FMT_POSINT)
861 error = nonneg_required;
869 error = unexpected_element;
874 /* Between a descriptor and what comes next. */
895 error = unexpected_end;
899 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
906 /* Optional comma is a weird between state where we've just finished
907 reading a colon, slash, dollar or P descriptor. */
924 /* Assume that we have another format item. */
931 extension_optional_comma:
932 /* As a GNU extension, permit a missing comma after a string literal. */
952 error = unexpected_end;
956 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
966 if (error == unexpected_element)
967 gfc_error (error, error_element, &format_locus);
969 gfc_error ("%s in format string at %L", error, &format_locus);
978 /* Given an expression node that is a constant string, see if it looks
979 like a format string. */
982 check_format_string (gfc_expr *e, bool is_input)
984 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
988 format_string = e->value.character.string;
990 /* More elaborate measures are needed to show where a problem is within a
991 format string that has been calculated, but that's probably not worth the
993 format_locus = e->where;
995 return check_format (is_input);
999 /************ Fortran 95 I/O statement matchers *************/
1001 /* Match a FORMAT statement. This amounts to actually parsing the
1002 format descriptors in order to correctly locate the end of the
1006 gfc_match_format (void)
1011 if (gfc_current_ns->proc_name
1012 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
1014 gfc_error ("Format statement in module main block at %C");
1018 if (gfc_statement_label == NULL)
1020 gfc_error ("Missing format label at %C");
1023 gfc_gobble_whitespace ();
1028 start = gfc_current_locus;
1030 if (check_format (false) == FAILURE)
1033 if (gfc_match_eos () != MATCH_YES)
1035 gfc_syntax_error (ST_FORMAT);
1039 /* The label doesn't get created until after the statement is done
1040 being matched, so we have to leave the string for later. */
1042 gfc_current_locus = start; /* Back to the beginning */
1045 new_st.op = EXEC_NOP;
1048 e->expr_type = EXPR_CONSTANT;
1049 e->ts.type = BT_CHARACTER;
1050 e->ts.kind = gfc_default_character_kind;
1052 e->value.character.string = format_string
1053 = gfc_get_wide_string (format_length + 1);
1054 e->value.character.length = format_length;
1055 gfc_statement_label->format = e;
1058 check_format (false); /* Guaranteed to succeed */
1059 gfc_match_eos (); /* Guaranteed to succeed */
1065 /* Match an expression I/O tag of some sort. */
1068 match_etag (const io_tag *tag, gfc_expr **v)
1073 m = gfc_match (tag->spec);
1077 m = gfc_match (tag->value, &result);
1080 gfc_error ("Invalid value for %s specification at %C", tag->name);
1086 gfc_error ("Duplicate %s specification at %C", tag->name);
1087 gfc_free_expr (result);
1096 /* Match a variable I/O tag of some sort. */
1099 match_vtag (const io_tag *tag, gfc_expr **v)
1104 m = gfc_match (tag->spec);
1108 m = gfc_match (tag->value, &result);
1111 gfc_error ("Invalid value for %s specification at %C", tag->name);
1117 gfc_error ("Duplicate %s specification at %C", tag->name);
1118 gfc_free_expr (result);
1122 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1124 gfc_error ("Variable tag cannot be INTENT(IN) at %C");
1125 gfc_free_expr (result);
1129 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1131 gfc_error ("Variable tag cannot be assigned in PURE procedure at %C");
1132 gfc_free_expr (result);
1141 /* Match I/O tags that cause variables to become redefined. */
1144 match_out_tag(const io_tag *tag, gfc_expr **result)
1148 m = match_vtag(tag, result);
1150 gfc_check_do_variable((*result)->symtree);
1156 /* Match a label I/O tag. */
1159 match_ltag (const io_tag *tag, gfc_st_label ** label)
1165 m = gfc_match (tag->spec);
1169 m = gfc_match (tag->value, label);
1172 gfc_error ("Invalid value for %s specification at %C", tag->name);
1178 gfc_error ("Duplicate %s label specification at %C", tag->name);
1182 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1189 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1192 resolve_tag_format (const gfc_expr *e)
1194 if (e->expr_type == EXPR_CONSTANT
1195 && (e->ts.type != BT_CHARACTER
1196 || e->ts.kind != gfc_default_character_kind))
1198 gfc_error ("Constant expression in FORMAT tag at %L must be "
1199 "of type default CHARACTER", &e->where);
1203 /* If e's rank is zero and e is not an element of an array, it should be
1204 of integer or character type. The integer variable should be
1206 if (e->symtree == NULL || e->symtree->n.sym->as == NULL
1207 || e->symtree->n.sym->as->rank == 0)
1209 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1211 gfc_error ("FORMAT tag at %L must be of type CHARACTER or INTEGER",
1215 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1217 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1218 "variable in FORMAT tag at %L", &e->where)
1221 if (e->symtree->n.sym->attr.assign != 1)
1223 gfc_error ("Variable '%s' at %L has not been assigned a "
1224 "format label", e->symtree->n.sym->name, &e->where);
1228 else if (e->ts.type == BT_INTEGER)
1230 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1231 "variable", gfc_basic_typename (e->ts.type), &e->where);
1238 /* If rank is nonzero, we allow the type to be character under GFC_STD_GNU
1239 and other type under GFC_STD_LEGACY. It may be assigned an Hollerith
1241 if (e->ts.type == BT_CHARACTER)
1243 if (gfc_notify_std (GFC_STD_GNU, "Extension: Character array "
1244 "in FORMAT tag at %L", &e->where) == FAILURE)
1249 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1250 "in FORMAT tag at %L", &e->where) == FAILURE)
1258 /* Do expression resolution and type-checking on an expression tag. */
1261 resolve_tag (const io_tag *tag, gfc_expr *e)
1266 if (gfc_resolve_expr (e) == FAILURE)
1269 if (tag == &tag_format)
1270 return resolve_tag_format (e);
1272 if (e->ts.type != tag->type)
1274 gfc_error ("%s tag at %L must be of type %s", tag->name,
1275 &e->where, gfc_basic_typename (tag->type));
1281 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1285 if (tag == &tag_iomsg)
1287 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1288 &e->where) == FAILURE)
1292 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1293 && e->ts.kind != gfc_default_integer_kind)
1295 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1296 "INTEGER in %s tag at %L", tag->name, &e->where)
1301 if (tag == &tag_convert)
1303 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1304 &e->where) == FAILURE)
1312 /* Match a single tag of an OPEN statement. */
1315 match_open_element (gfc_open *open)
1319 m = match_etag (&tag_e_async, &open->asynchronous);
1322 m = match_etag (&tag_unit, &open->unit);
1325 m = match_out_tag (&tag_iomsg, &open->iomsg);
1328 m = match_out_tag (&tag_iostat, &open->iostat);
1331 m = match_etag (&tag_file, &open->file);
1334 m = match_etag (&tag_status, &open->status);
1337 m = match_etag (&tag_e_access, &open->access);
1340 m = match_etag (&tag_e_form, &open->form);
1343 m = match_etag (&tag_e_recl, &open->recl);
1346 m = match_etag (&tag_e_blank, &open->blank);
1349 m = match_etag (&tag_e_position, &open->position);
1352 m = match_etag (&tag_e_action, &open->action);
1355 m = match_etag (&tag_e_delim, &open->delim);
1358 m = match_etag (&tag_e_pad, &open->pad);
1361 m = match_etag (&tag_e_decimal, &open->decimal);
1364 m = match_etag (&tag_e_encoding, &open->encoding);
1367 m = match_etag (&tag_e_round, &open->round);
1370 m = match_etag (&tag_e_sign, &open->sign);
1373 m = match_ltag (&tag_err, &open->err);
1376 m = match_etag (&tag_convert, &open->convert);
1384 /* Free the gfc_open structure and all the expressions it contains. */
1387 gfc_free_open (gfc_open *open)
1392 gfc_free_expr (open->unit);
1393 gfc_free_expr (open->iomsg);
1394 gfc_free_expr (open->iostat);
1395 gfc_free_expr (open->file);
1396 gfc_free_expr (open->status);
1397 gfc_free_expr (open->access);
1398 gfc_free_expr (open->form);
1399 gfc_free_expr (open->recl);
1400 gfc_free_expr (open->blank);
1401 gfc_free_expr (open->position);
1402 gfc_free_expr (open->action);
1403 gfc_free_expr (open->delim);
1404 gfc_free_expr (open->pad);
1405 gfc_free_expr (open->decimal);
1406 gfc_free_expr (open->encoding);
1407 gfc_free_expr (open->round);
1408 gfc_free_expr (open->sign);
1409 gfc_free_expr (open->convert);
1410 gfc_free_expr (open->asynchronous);
1415 /* Resolve everything in a gfc_open structure. */
1418 gfc_resolve_open (gfc_open *open)
1421 RESOLVE_TAG (&tag_unit, open->unit);
1422 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1423 RESOLVE_TAG (&tag_iostat, open->iostat);
1424 RESOLVE_TAG (&tag_file, open->file);
1425 RESOLVE_TAG (&tag_status, open->status);
1426 RESOLVE_TAG (&tag_e_access, open->access);
1427 RESOLVE_TAG (&tag_e_form, open->form);
1428 RESOLVE_TAG (&tag_e_recl, open->recl);
1429 RESOLVE_TAG (&tag_e_blank, open->blank);
1430 RESOLVE_TAG (&tag_e_position, open->position);
1431 RESOLVE_TAG (&tag_e_action, open->action);
1432 RESOLVE_TAG (&tag_e_delim, open->delim);
1433 RESOLVE_TAG (&tag_e_pad, open->pad);
1434 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1435 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1436 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1437 RESOLVE_TAG (&tag_e_round, open->round);
1438 RESOLVE_TAG (&tag_e_sign, open->sign);
1439 RESOLVE_TAG (&tag_convert, open->convert);
1441 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1448 /* Check if a given value for a SPECIFIER is either in the list of values
1449 allowed in F95 or F2003, issuing an error message and returning a zero
1450 value if it is not allowed. */
1453 compare_to_allowed_values (const char *specifier, const char *allowed[],
1454 const char *allowed_f2003[],
1455 const char *allowed_gnu[], gfc_char_t *value,
1456 const char *statement, bool warn)
1461 len = gfc_wide_strlen (value);
1464 for (len--; len > 0; len--)
1465 if (value[len] != ' ')
1470 for (i = 0; allowed[i]; i++)
1471 if (len == strlen (allowed[i])
1472 && gfc_wide_strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1475 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1476 if (len == strlen (allowed_f2003[i])
1477 && gfc_wide_strncasecmp (value, allowed_f2003[i],
1478 strlen (allowed_f2003[i])) == 0)
1480 notification n = gfc_notification_std (GFC_STD_F2003);
1482 if (n == WARNING || (warn && n == ERROR))
1484 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1485 "has value '%s'", specifier, statement,
1492 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1493 "%s statement at %C has value '%s'", specifier,
1494 statement, allowed_f2003[i]);
1502 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1503 if (len == strlen (allowed_gnu[i])
1504 && gfc_wide_strncasecmp (value, allowed_gnu[i],
1505 strlen (allowed_gnu[i])) == 0)
1507 notification n = gfc_notification_std (GFC_STD_GNU);
1509 if (n == WARNING || (warn && n == ERROR))
1511 gfc_warning ("Extension: %s specifier in %s statement at %C "
1512 "has value '%s'", specifier, statement,
1519 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1520 "%s statement at %C has value '%s'", specifier,
1521 statement, allowed_gnu[i]);
1531 char *s = gfc_widechar_to_char (value, -1);
1532 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1533 specifier, statement, s);
1539 char *s = gfc_widechar_to_char (value, -1);
1540 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1541 specifier, statement, s);
1548 /* Match an OPEN statement. */
1551 gfc_match_open (void)
1557 m = gfc_match_char ('(');
1561 open = XCNEW (gfc_open);
1563 m = match_open_element (open);
1565 if (m == MATCH_ERROR)
1569 m = gfc_match_expr (&open->unit);
1572 if (m == MATCH_ERROR)
1578 if (gfc_match_char (')') == MATCH_YES)
1580 if (gfc_match_char (',') != MATCH_YES)
1583 m = match_open_element (open);
1584 if (m == MATCH_ERROR)
1590 if (gfc_match_eos () == MATCH_NO)
1593 if (gfc_pure (NULL))
1595 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1599 warn = (open->err || open->iostat) ? true : false;
1600 /* Checks on the ACCESS specifier. */
1601 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1603 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1604 static const char *access_f2003[] = { "STREAM", NULL };
1605 static const char *access_gnu[] = { "APPEND", NULL };
1607 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1609 open->access->value.character.string,
1614 /* Checks on the ACTION specifier. */
1615 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1617 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1619 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1620 open->action->value.character.string,
1625 /* Checks on the ASYNCHRONOUS specifier. */
1626 if (open->asynchronous)
1628 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1629 "not allowed in Fortran 95") == FAILURE)
1632 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1634 static const char * asynchronous[] = { "YES", "NO", NULL };
1636 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1637 NULL, NULL, open->asynchronous->value.character.string,
1643 /* Checks on the BLANK specifier. */
1646 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1647 "not allowed in Fortran 95") == FAILURE)
1650 if (open->blank->expr_type == EXPR_CONSTANT)
1652 static const char *blank[] = { "ZERO", "NULL", NULL };
1654 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1655 open->blank->value.character.string,
1661 /* Checks on the DECIMAL specifier. */
1664 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1665 "not allowed in Fortran 95") == FAILURE)
1668 if (open->decimal->expr_type == EXPR_CONSTANT)
1670 static const char * decimal[] = { "COMMA", "POINT", NULL };
1672 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1673 open->decimal->value.character.string,
1679 /* Checks on the DELIM specifier. */
1682 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1683 "not allowed in Fortran 95") == FAILURE)
1686 if (open->delim->expr_type == EXPR_CONSTANT)
1688 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1690 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1691 open->delim->value.character.string,
1697 /* Checks on the ENCODING specifier. */
1700 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1701 "not allowed in Fortran 95") == FAILURE)
1704 if (open->encoding->expr_type == EXPR_CONSTANT)
1706 static const char * encoding[] = { "DEFAULT", "UTF-8", NULL };
1708 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1709 open->encoding->value.character.string,
1715 /* Checks on the FORM specifier. */
1716 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1718 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1720 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1721 open->form->value.character.string,
1726 /* Checks on the PAD specifier. */
1727 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1729 static const char *pad[] = { "YES", "NO", NULL };
1731 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1732 open->pad->value.character.string,
1737 /* Checks on the POSITION specifier. */
1738 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1740 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1742 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1743 open->position->value.character.string,
1748 /* Checks on the ROUND specifier. */
1751 /* When implemented, change the following to use gfc_notify_std F2003. */
1752 gfc_error ("Fortran F2003: ROUND= specifier at %C not implemented");
1755 if (open->round->expr_type == EXPR_CONSTANT)
1757 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1758 "COMPATIBLE", "PROCESSOR_DEFINED",
1761 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1762 open->round->value.character.string,
1768 /* Checks on the SIGN specifier. */
1771 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
1772 "not allowed in Fortran 95") == FAILURE)
1775 if (open->sign->expr_type == EXPR_CONSTANT)
1777 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
1780 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
1781 open->sign->value.character.string,
1787 #define warn_or_error(...) \
1790 gfc_warning (__VA_ARGS__); \
1793 gfc_error (__VA_ARGS__); \
1798 /* Checks on the RECL specifier. */
1799 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
1800 && open->recl->ts.type == BT_INTEGER
1801 && mpz_sgn (open->recl->value.integer) != 1)
1803 warn_or_error ("RECL in OPEN statement at %C must be positive");
1806 /* Checks on the STATUS specifier. */
1807 if (open->status && open->status->expr_type == EXPR_CONSTANT)
1809 static const char *status[] = { "OLD", "NEW", "SCRATCH",
1810 "REPLACE", "UNKNOWN", NULL };
1812 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1813 open->status->value.character.string,
1817 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
1818 the FILE= specifier shall appear. */
1819 if (open->file == NULL
1820 && (gfc_wide_strncasecmp (open->status->value.character.string,
1822 || gfc_wide_strncasecmp (open->status->value.character.string,
1825 char *s = gfc_widechar_to_char (open->status->value.character.string,
1827 warn_or_error ("The STATUS specified in OPEN statement at %C is "
1828 "'%s' and no FILE specifier is present", s);
1832 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
1833 the FILE= specifier shall not appear. */
1834 if (gfc_wide_strncasecmp (open->status->value.character.string,
1835 "scratch", 7) == 0 && open->file)
1837 warn_or_error ("The STATUS specified in OPEN statement at %C "
1838 "cannot have the value SCRATCH if a FILE specifier "
1843 /* Things that are not allowed for unformatted I/O. */
1844 if (open->form && open->form->expr_type == EXPR_CONSTANT
1845 && (open->delim || open->decimal || open->encoding || open->round
1846 || open->sign || open->pad || open->blank)
1847 && gfc_wide_strncasecmp (open->form->value.character.string,
1848 "unformatted", 11) == 0)
1850 const char *spec = (open->delim ? "DELIM "
1851 : (open->pad ? "PAD " : open->blank
1854 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
1855 "unformatted I/O", spec);
1858 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
1859 && gfc_wide_strncasecmp (open->access->value.character.string,
1862 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
1867 && open->access && open->access->expr_type == EXPR_CONSTANT
1868 && !(gfc_wide_strncasecmp (open->access->value.character.string,
1869 "sequential", 10) == 0
1870 || gfc_wide_strncasecmp (open->access->value.character.string,
1872 || gfc_wide_strncasecmp (open->access->value.character.string,
1875 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
1876 "for stream or sequential ACCESS");
1879 #undef warn_or_error
1881 new_st.op = EXEC_OPEN;
1882 new_st.ext.open = open;
1886 gfc_syntax_error (ST_OPEN);
1889 gfc_free_open (open);
1894 /* Free a gfc_close structure an all its expressions. */
1897 gfc_free_close (gfc_close *close)
1902 gfc_free_expr (close->unit);
1903 gfc_free_expr (close->iomsg);
1904 gfc_free_expr (close->iostat);
1905 gfc_free_expr (close->status);
1910 /* Match elements of a CLOSE statement. */
1913 match_close_element (gfc_close *close)
1917 m = match_etag (&tag_unit, &close->unit);
1920 m = match_etag (&tag_status, &close->status);
1923 m = match_out_tag (&tag_iomsg, &close->iomsg);
1926 m = match_out_tag (&tag_iostat, &close->iostat);
1929 m = match_ltag (&tag_err, &close->err);
1937 /* Match a CLOSE statement. */
1940 gfc_match_close (void)
1946 m = gfc_match_char ('(');
1950 close = XCNEW (gfc_close);
1952 m = match_close_element (close);
1954 if (m == MATCH_ERROR)
1958 m = gfc_match_expr (&close->unit);
1961 if (m == MATCH_ERROR)
1967 if (gfc_match_char (')') == MATCH_YES)
1969 if (gfc_match_char (',') != MATCH_YES)
1972 m = match_close_element (close);
1973 if (m == MATCH_ERROR)
1979 if (gfc_match_eos () == MATCH_NO)
1982 if (gfc_pure (NULL))
1984 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
1988 warn = (close->iostat || close->err) ? true : false;
1990 /* Checks on the STATUS specifier. */
1991 if (close->status && close->status->expr_type == EXPR_CONSTANT)
1993 static const char *status[] = { "KEEP", "DELETE", NULL };
1995 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1996 close->status->value.character.string,
2001 new_st.op = EXEC_CLOSE;
2002 new_st.ext.close = close;
2006 gfc_syntax_error (ST_CLOSE);
2009 gfc_free_close (close);
2014 /* Resolve everything in a gfc_close structure. */
2017 gfc_resolve_close (gfc_close *close)
2019 RESOLVE_TAG (&tag_unit, close->unit);
2020 RESOLVE_TAG (&tag_iomsg, close->iomsg);
2021 RESOLVE_TAG (&tag_iostat, close->iostat);
2022 RESOLVE_TAG (&tag_status, close->status);
2024 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
2031 /* Free a gfc_filepos structure. */
2034 gfc_free_filepos (gfc_filepos *fp)
2036 gfc_free_expr (fp->unit);
2037 gfc_free_expr (fp->iomsg);
2038 gfc_free_expr (fp->iostat);
2043 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
2046 match_file_element (gfc_filepos *fp)
2050 m = match_etag (&tag_unit, &fp->unit);
2053 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2056 m = match_out_tag (&tag_iostat, &fp->iostat);
2059 m = match_ltag (&tag_err, &fp->err);
2067 /* Match the second half of the file-positioning statements, REWIND,
2068 BACKSPACE, ENDFILE, or the FLUSH statement. */
2071 match_filepos (gfc_statement st, gfc_exec_op op)
2076 fp = XCNEW (gfc_filepos);
2078 if (gfc_match_char ('(') == MATCH_NO)
2080 m = gfc_match_expr (&fp->unit);
2081 if (m == MATCH_ERROR)
2089 m = match_file_element (fp);
2090 if (m == MATCH_ERROR)
2094 m = gfc_match_expr (&fp->unit);
2095 if (m == MATCH_ERROR)
2103 if (gfc_match_char (')') == MATCH_YES)
2105 if (gfc_match_char (',') != MATCH_YES)
2108 m = match_file_element (fp);
2109 if (m == MATCH_ERROR)
2116 if (gfc_match_eos () != MATCH_YES)
2119 if (gfc_pure (NULL))
2121 gfc_error ("%s statement not allowed in PURE procedure at %C",
2122 gfc_ascii_statement (st));
2128 new_st.ext.filepos = fp;
2132 gfc_syntax_error (st);
2135 gfc_free_filepos (fp);
2141 gfc_resolve_filepos (gfc_filepos *fp)
2143 RESOLVE_TAG (&tag_unit, fp->unit);
2144 RESOLVE_TAG (&tag_iostat, fp->iostat);
2145 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2146 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2153 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2154 and the FLUSH statement. */
2157 gfc_match_endfile (void)
2159 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2163 gfc_match_backspace (void)
2165 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2169 gfc_match_rewind (void)
2171 return match_filepos (ST_REWIND, EXEC_REWIND);
2175 gfc_match_flush (void)
2177 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2181 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2184 /******************** Data Transfer Statements *********************/
2186 /* Return a default unit number. */
2189 default_unit (io_kind k)
2198 return gfc_int_expr (unit);
2202 /* Match a unit specification for a data transfer statement. */
2205 match_dt_unit (io_kind k, gfc_dt *dt)
2209 if (gfc_match_char ('*') == MATCH_YES)
2211 if (dt->io_unit != NULL)
2214 dt->io_unit = default_unit (k);
2218 if (gfc_match_expr (&e) == MATCH_YES)
2220 if (dt->io_unit != NULL)
2233 gfc_error ("Duplicate UNIT specification at %C");
2238 /* Match a format specification. */
2241 match_dt_format (gfc_dt *dt)
2245 gfc_st_label *label;
2248 where = gfc_current_locus;
2250 if (gfc_match_char ('*') == MATCH_YES)
2252 if (dt->format_expr != NULL || dt->format_label != NULL)
2255 dt->format_label = &format_asterisk;
2259 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2261 if (dt->format_expr != NULL || dt->format_label != NULL)
2263 gfc_free_st_label (label);
2267 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2270 dt->format_label = label;
2273 else if (m == MATCH_ERROR)
2274 /* The label was zero or too large. Emit the correct diagnosis. */
2277 if (gfc_match_expr (&e) == MATCH_YES)
2279 if (dt->format_expr != NULL || dt->format_label != NULL)
2284 dt->format_expr = e;
2288 gfc_current_locus = where; /* The only case where we have to restore */
2293 gfc_error ("Duplicate format specification at %C");
2298 /* Traverse a namelist that is part of a READ statement to make sure
2299 that none of the variables in the namelist are INTENT(IN). Returns
2300 nonzero if we find such a variable. */
2303 check_namelist (gfc_symbol *sym)
2307 for (p = sym->namelist; p; p = p->next)
2308 if (p->sym->attr.intent == INTENT_IN)
2310 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2311 p->sym->name, sym->name);
2319 /* Match a single data transfer element. */
2322 match_dt_element (io_kind k, gfc_dt *dt)
2324 char name[GFC_MAX_SYMBOL_LEN + 1];
2328 if (gfc_match (" unit =") == MATCH_YES)
2330 m = match_dt_unit (k, dt);
2335 if (gfc_match (" fmt =") == MATCH_YES)
2337 m = match_dt_format (dt);
2342 if (gfc_match (" nml = %n", name) == MATCH_YES)
2344 if (dt->namelist != NULL)
2346 gfc_error ("Duplicate NML specification at %C");
2350 if (gfc_find_symbol (name, NULL, 1, &sym))
2353 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2355 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2356 sym != NULL ? sym->name : name);
2361 if (k == M_READ && check_namelist (sym))
2367 m = match_etag (&tag_e_async, &dt->asynchronous);
2370 m = match_etag (&tag_e_blank, &dt->blank);
2373 m = match_etag (&tag_e_delim, &dt->delim);
2376 m = match_etag (&tag_e_pad, &dt->pad);
2379 m = match_etag (&tag_e_sign, &dt->sign);
2382 m = match_etag (&tag_e_round, &dt->round);
2385 m = match_out_tag (&tag_id, &dt->id);
2388 m = match_etag (&tag_e_decimal, &dt->decimal);
2391 m = match_etag (&tag_rec, &dt->rec);
2394 m = match_etag (&tag_spos, &dt->rec);
2397 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2400 m = match_out_tag (&tag_iostat, &dt->iostat);
2403 m = match_ltag (&tag_err, &dt->err);
2405 dt->err_where = gfc_current_locus;
2408 m = match_etag (&tag_advance, &dt->advance);
2411 m = match_out_tag (&tag_size, &dt->size);
2415 m = match_ltag (&tag_end, &dt->end);
2420 gfc_error ("END tag at %C not allowed in output statement");
2423 dt->end_where = gfc_current_locus;
2428 m = match_ltag (&tag_eor, &dt->eor);
2430 dt->eor_where = gfc_current_locus;
2438 /* Free a data transfer structure and everything below it. */
2441 gfc_free_dt (gfc_dt *dt)
2446 gfc_free_expr (dt->io_unit);
2447 gfc_free_expr (dt->format_expr);
2448 gfc_free_expr (dt->rec);
2449 gfc_free_expr (dt->advance);
2450 gfc_free_expr (dt->iomsg);
2451 gfc_free_expr (dt->iostat);
2452 gfc_free_expr (dt->size);
2453 gfc_free_expr (dt->pad);
2454 gfc_free_expr (dt->delim);
2455 gfc_free_expr (dt->sign);
2456 gfc_free_expr (dt->round);
2457 gfc_free_expr (dt->blank);
2458 gfc_free_expr (dt->decimal);
2459 gfc_free_expr (dt->extra_comma);
2464 /* Resolve everything in a gfc_dt structure. */
2467 gfc_resolve_dt (gfc_dt *dt)
2471 RESOLVE_TAG (&tag_format, dt->format_expr);
2472 RESOLVE_TAG (&tag_rec, dt->rec);
2473 RESOLVE_TAG (&tag_spos, dt->rec);
2474 RESOLVE_TAG (&tag_advance, dt->advance);
2475 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2476 RESOLVE_TAG (&tag_iostat, dt->iostat);
2477 RESOLVE_TAG (&tag_size, dt->size);
2478 RESOLVE_TAG (&tag_e_pad, dt->pad);
2479 RESOLVE_TAG (&tag_e_delim, dt->delim);
2480 RESOLVE_TAG (&tag_e_sign, dt->sign);
2481 RESOLVE_TAG (&tag_e_round, dt->round);
2482 RESOLVE_TAG (&tag_e_blank, dt->blank);
2483 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2486 if (gfc_resolve_expr (e) == SUCCESS
2487 && (e->ts.type != BT_INTEGER
2488 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2490 /* If there is no extra comma signifying the "format" form of the IO
2491 statement, then this must be an error. */
2492 if (!dt->extra_comma)
2494 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2495 "or a CHARACTER variable", &e->where);
2500 /* At this point, we have an extra comma. If io_unit has arrived as
2501 type character, we assume its really the "format" form of the I/O
2502 statement. We set the io_unit to the default unit and format to
2503 the character expression. See F95 Standard section 9.4. */
2505 k = dt->extra_comma->value.iokind;
2506 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2508 dt->format_expr = dt->io_unit;
2509 dt->io_unit = default_unit (k);
2511 /* Free this pointer now so that a warning/error is not triggered
2512 below for the "Extension". */
2513 gfc_free_expr (dt->extra_comma);
2514 dt->extra_comma = NULL;
2519 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2520 &dt->extra_comma->where);
2526 if (e->ts.type == BT_CHARACTER)
2528 if (gfc_has_vector_index (e))
2530 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2535 if (e->rank && e->ts.type != BT_CHARACTER)
2537 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2542 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2543 "item list at %L", &dt->extra_comma->where) == FAILURE)
2548 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2550 if (dt->err->defined == ST_LABEL_UNKNOWN)
2552 gfc_error ("ERR tag label %d at %L not defined",
2553 dt->err->value, &dt->err_where);
2560 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2562 if (dt->end->defined == ST_LABEL_UNKNOWN)
2564 gfc_error ("END tag label %d at %L not defined",
2565 dt->end->value, &dt->end_where);
2572 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2574 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2576 gfc_error ("EOR tag label %d at %L not defined",
2577 dt->eor->value, &dt->eor_where);
2582 /* Check the format label actually exists. */
2583 if (dt->format_label && dt->format_label != &format_asterisk
2584 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2586 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2587 &dt->format_label->where);
2594 /* Given an io_kind, return its name. */
2597 io_kind_name (io_kind k)
2616 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2623 /* Match an IO iteration statement of the form:
2625 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2627 which is equivalent to a single IO element. This function is
2628 mutually recursive with match_io_element(). */
2630 static match match_io_element (io_kind, gfc_code **);
2633 match_io_iterator (io_kind k, gfc_code **result)
2635 gfc_code *head, *tail, *new_code;
2643 old_loc = gfc_current_locus;
2645 if (gfc_match_char ('(') != MATCH_YES)
2648 m = match_io_element (k, &head);
2651 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2657 /* Can't be anything but an IO iterator. Build a list. */
2658 iter = gfc_get_iterator ();
2662 m = gfc_match_iterator (iter, 0);
2663 if (m == MATCH_ERROR)
2667 gfc_check_do_variable (iter->var->symtree);
2671 m = match_io_element (k, &new_code);
2672 if (m == MATCH_ERROR)
2681 tail = gfc_append_code (tail, new_code);
2683 if (gfc_match_char (',') != MATCH_YES)
2692 if (gfc_match_char (')') != MATCH_YES)
2695 new_code = gfc_get_code ();
2696 new_code->op = EXEC_DO;
2697 new_code->ext.iterator = iter;
2699 new_code->block = gfc_get_code ();
2700 new_code->block->op = EXEC_DO;
2701 new_code->block->next = head;
2707 gfc_error ("Syntax error in I/O iterator at %C");
2711 gfc_free_iterator (iter, 1);
2712 gfc_free_statements (head);
2713 gfc_current_locus = old_loc;
2718 /* Match a single element of an IO list, which is either a single
2719 expression or an IO Iterator. */
2722 match_io_element (io_kind k, gfc_code **cpp)
2730 m = match_io_iterator (k, cpp);
2736 m = gfc_match_variable (&expr, 0);
2738 gfc_error ("Expected variable in READ statement at %C");
2742 m = gfc_match_expr (&expr);
2744 gfc_error ("Expected expression in %s statement at %C",
2752 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2754 gfc_error ("Variable '%s' in input list at %C cannot be "
2755 "INTENT(IN)", expr->symtree->n.sym->name);
2760 && gfc_impure_variable (expr->symtree->n.sym)
2761 && current_dt->io_unit->ts.type == BT_CHARACTER)
2763 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2764 expr->symtree->n.sym->name);
2768 if (gfc_check_do_variable (expr->symtree))
2774 if (current_dt->io_unit->ts.type == BT_CHARACTER
2776 && current_dt->io_unit->expr_type == EXPR_VARIABLE
2777 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
2779 gfc_error ("Cannot write to internal file unit '%s' at %C "
2780 "inside a PURE procedure",
2781 current_dt->io_unit->symtree->n.sym->name);
2793 gfc_free_expr (expr);
2797 cp = gfc_get_code ();
2798 cp->op = EXEC_TRANSFER;
2806 /* Match an I/O list, building gfc_code structures as we go. */
2809 match_io_list (io_kind k, gfc_code **head_p)
2811 gfc_code *head, *tail, *new_code;
2814 *head_p = head = tail = NULL;
2815 if (gfc_match_eos () == MATCH_YES)
2820 m = match_io_element (k, &new_code);
2821 if (m == MATCH_ERROR)
2826 tail = gfc_append_code (tail, new_code);
2830 if (gfc_match_eos () == MATCH_YES)
2832 if (gfc_match_char (',') != MATCH_YES)
2840 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2843 gfc_free_statements (head);
2848 /* Attach the data transfer end node. */
2851 terminate_io (gfc_code *io_code)
2855 if (io_code == NULL)
2856 io_code = new_st.block;
2858 c = gfc_get_code ();
2859 c->op = EXEC_DT_END;
2861 /* Point to structure that is already there */
2862 c->ext.dt = new_st.ext.dt;
2863 gfc_append_code (io_code, c);
2867 /* Check the constraints for a data transfer statement. The majority of the
2868 constraints appearing in 9.4 of the standard appear here. Some are handled
2869 in resolve_tag and others in gfc_resolve_dt. */
2872 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
2875 #define io_constraint(condition,msg,arg)\
2878 gfc_error(msg,arg);\
2884 gfc_symbol *sym = NULL;
2885 bool warn, unformatted;
2887 warn = (dt->err || dt->iostat) ? true : false;
2888 unformatted = dt->format_expr == NULL && dt->format_label == NULL
2889 && dt->namelist == NULL;
2894 if (expr && expr->expr_type == EXPR_VARIABLE
2895 && expr->ts.type == BT_CHARACTER)
2897 sym = expr->symtree->n.sym;
2899 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
2900 "Internal file at %L must not be INTENT(IN)",
2903 io_constraint (gfc_has_vector_index (dt->io_unit),
2904 "Internal file incompatible with vector subscript at %L",
2907 io_constraint (dt->rec != NULL,
2908 "REC tag at %L is incompatible with internal file",
2911 io_constraint (unformatted,
2912 "Unformatted I/O not allowed with internal unit at %L",
2913 &dt->io_unit->where);
2915 io_constraint (dt->asynchronous != NULL,
2916 "ASYNCHRONOUS tag at %L not allowed with internal file",
2917 &dt->asynchronous->where);
2919 if (dt->namelist != NULL)
2921 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
2922 "at %L with namelist", &expr->where)
2927 io_constraint (dt->advance != NULL,
2928 "ADVANCE tag at %L is incompatible with internal file",
2929 &dt->advance->where);
2932 if (expr && expr->ts.type != BT_CHARACTER)
2935 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
2936 "IO UNIT in %s statement at %C must be "
2937 "an internal file in a PURE procedure",
2943 io_constraint (dt->end, "END tag not allowed with output at %L",
2946 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
2949 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
2952 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
2955 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
2960 io_constraint (dt->size && dt->advance == NULL,
2961 "SIZE tag at %L requires an ADVANCE tag",
2964 io_constraint (dt->eor && dt->advance == NULL,
2965 "EOR tag at %L requires an ADVANCE tag",
2969 if (dt->asynchronous)
2971 static const char * asynchronous[] = { "YES", "NO", NULL };
2973 if (dt->asynchronous->expr_type != EXPR_CONSTANT)
2975 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
2976 "expression", &dt->asynchronous->where);
2980 if (!compare_to_allowed_values
2981 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
2982 dt->asynchronous->value.character.string,
2983 io_kind_name (k), warn))
2991 || gfc_wide_strlen (dt->asynchronous->value.character.string) != 3
2992 || gfc_wide_strncasecmp (dt->asynchronous->value.character.string,
2994 io_constraint (not_yes,
2995 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
2996 "specifier", &dt->id->where);
3001 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
3002 "not allowed in Fortran 95") == FAILURE)
3005 if (dt->decimal->expr_type == EXPR_CONSTANT)
3007 static const char * decimal[] = { "COMMA", "POINT", NULL };
3009 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
3010 dt->decimal->value.character.string,
3011 io_kind_name (k), warn))
3014 io_constraint (unformatted,
3015 "the DECIMAL= specifier at %L must be with an "
3016 "explicit format expression", &dt->decimal->where);
3022 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
3023 "not allowed in Fortran 95") == FAILURE)
3026 if (dt->blank->expr_type == EXPR_CONSTANT)
3028 static const char * blank[] = { "NULL", "ZERO", NULL };
3030 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
3031 dt->blank->value.character.string,
3032 io_kind_name (k), warn))
3035 io_constraint (unformatted,
3036 "the BLANK= specifier at %L must be with an "
3037 "explicit format expression", &dt->blank->where);
3043 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
3044 "not allowed in Fortran 95") == FAILURE)
3047 if (dt->pad->expr_type == EXPR_CONSTANT)
3049 static const char * pad[] = { "YES", "NO", NULL };
3051 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3052 dt->pad->value.character.string,
3053 io_kind_name (k), warn))
3056 io_constraint (unformatted,
3057 "the PAD= specifier at %L must be with an "
3058 "explicit format expression", &dt->pad->where);
3064 /* When implemented, change the following to use gfc_notify_std F2003.
3065 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3066 "not allowed in Fortran 95") == FAILURE)
3067 return MATCH_ERROR; */
3068 gfc_error ("F2003 Feature: ROUND= specifier at %C not implemented");
3071 if (dt->round->expr_type == EXPR_CONSTANT)
3073 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3074 "COMPATIBLE", "PROCESSOR_DEFINED",
3077 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3078 dt->round->value.character.string,
3079 io_kind_name (k), warn))
3086 /* When implemented, change the following to use gfc_notify_std F2003.
3087 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3088 "not allowed in Fortran 95") == FAILURE)
3089 return MATCH_ERROR; */
3090 if (dt->sign->expr_type == EXPR_CONSTANT)
3092 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3095 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3096 dt->sign->value.character.string,
3097 io_kind_name (k), warn))
3100 io_constraint (unformatted,
3101 "SIGN= specifier at %L must be with an "
3102 "explicit format expression", &dt->sign->where);
3104 io_constraint (k == M_READ,
3105 "SIGN= specifier at %L not allowed in a "
3106 "READ statement", &dt->sign->where);
3112 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3113 "not allowed in Fortran 95") == FAILURE)
3116 if (dt->delim->expr_type == EXPR_CONSTANT)
3118 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3120 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3121 dt->delim->value.character.string,
3122 io_kind_name (k), warn))
3125 io_constraint (k == M_READ,
3126 "DELIM= specifier at %L not allowed in a "
3127 "READ statement", &dt->delim->where);
3129 io_constraint (dt->format_label != &format_asterisk
3130 && dt->namelist == NULL,
3131 "DELIM= specifier at %L must have FMT=*",
3134 io_constraint (unformatted && dt->namelist == NULL,
3135 "DELIM= specifier at %L must be with FMT=* or "
3136 "NML= specifier ", &dt->delim->where);
3142 io_constraint (io_code && dt->namelist,
3143 "NAMELIST cannot be followed by IO-list at %L",
3146 io_constraint (dt->format_expr,
3147 "IO spec-list cannot contain both NAMELIST group name "
3148 "and format specification at %L.",
3149 &dt->format_expr->where);
3151 io_constraint (dt->format_label,
3152 "IO spec-list cannot contain both NAMELIST group name "
3153 "and format label at %L", spec_end);
3155 io_constraint (dt->rec,
3156 "NAMELIST IO is not allowed with a REC= specifier "
3157 "at %L.", &dt->rec->where);
3159 io_constraint (dt->advance,
3160 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3161 "at %L.", &dt->advance->where);
3166 io_constraint (dt->end,
3167 "An END tag is not allowed with a "
3168 "REC= specifier at %L.", &dt->end_where);
3170 io_constraint (dt->format_label == &format_asterisk,
3171 "FMT=* is not allowed with a REC= specifier "
3172 "at %L.", spec_end);
3177 int not_yes, not_no;
3180 io_constraint (dt->format_label == &format_asterisk,
3181 "List directed format(*) is not allowed with a "
3182 "ADVANCE= specifier at %L.", &expr->where);
3184 io_constraint (unformatted,
3185 "the ADVANCE= specifier at %L must appear with an "
3186 "explicit format expression", &expr->where);
3188 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3190 const gfc_char_t *advance = expr->value.character.string;
3191 not_no = gfc_wide_strlen (advance) != 2
3192 || gfc_wide_strncasecmp (advance, "no", 2) != 0;
3193 not_yes = gfc_wide_strlen (advance) != 3
3194 || gfc_wide_strncasecmp (advance, "yes", 3) != 0;
3202 io_constraint (not_no && not_yes,
3203 "ADVANCE= specifier at %L must have value = "
3204 "YES or NO.", &expr->where);
3206 io_constraint (dt->size && not_no && k == M_READ,
3207 "SIZE tag at %L requires an ADVANCE = 'NO'",
3210 io_constraint (dt->eor && not_no && k == M_READ,
3211 "EOR tag at %L requires an ADVANCE = 'NO'",
3215 expr = dt->format_expr;
3216 if (gfc_simplify_expr (expr, 0) == FAILURE
3217 || check_format_string (expr, k == M_READ) == FAILURE)
3222 #undef io_constraint
3225 /* Match a READ, WRITE or PRINT statement. */
3228 match_io (io_kind k)
3230 char name[GFC_MAX_SYMBOL_LEN + 1];
3239 where = gfc_current_locus;
3241 current_dt = dt = XCNEW (gfc_dt);
3242 m = gfc_match_char ('(');
3245 where = gfc_current_locus;
3248 else if (k == M_PRINT)
3250 /* Treat the non-standard case of PRINT namelist. */
3251 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3252 && gfc_match_name (name) == MATCH_YES)
3254 gfc_find_symbol (name, NULL, 1, &sym);
3255 if (sym && sym->attr.flavor == FL_NAMELIST)
3257 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3258 "%C is an extension") == FAILURE)
3264 dt->io_unit = default_unit (k);
3269 gfc_current_locus = where;
3273 if (gfc_current_form == FORM_FREE)
3275 char c = gfc_peek_ascii_char ();
3276 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3283 m = match_dt_format (dt);
3284 if (m == MATCH_ERROR)
3290 dt->io_unit = default_unit (k);
3295 /* Before issuing an error for a malformed 'print (1,*)' type of
3296 error, check for a default-char-expr of the form ('(I0)'). */
3297 if (k == M_PRINT && m == MATCH_YES)
3299 /* Reset current locus to get the initial '(' in an expression. */
3300 gfc_current_locus = where;
3301 dt->format_expr = NULL;
3302 m = match_dt_format (dt);
3304 if (m == MATCH_ERROR)
3306 if (m == MATCH_NO || dt->format_expr == NULL)
3310 dt->io_unit = default_unit (k);
3315 /* Match a control list */
3316 if (match_dt_element (k, dt) == MATCH_YES)
3318 if (match_dt_unit (k, dt) != MATCH_YES)
3321 if (gfc_match_char (')') == MATCH_YES)
3323 if (gfc_match_char (',') != MATCH_YES)
3326 m = match_dt_element (k, dt);
3329 if (m == MATCH_ERROR)
3332 m = match_dt_format (dt);
3335 if (m == MATCH_ERROR)
3338 where = gfc_current_locus;
3340 m = gfc_match_name (name);
3343 gfc_find_symbol (name, NULL, 1, &sym);
3344 if (sym && sym->attr.flavor == FL_NAMELIST)
3347 if (k == M_READ && check_namelist (sym))
3356 gfc_current_locus = where;
3358 goto loop; /* No matches, try regular elements */
3361 if (gfc_match_char (')') == MATCH_YES)
3363 if (gfc_match_char (',') != MATCH_YES)
3369 m = match_dt_element (k, dt);
3372 if (m == MATCH_ERROR)
3375 if (gfc_match_char (')') == MATCH_YES)
3377 if (gfc_match_char (',') != MATCH_YES)
3383 /* Used in check_io_constraints, where no locus is available. */
3384 spec_end = gfc_current_locus;
3386 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3387 to save the locus. This is used later when resolving transfer statements
3388 that might have a format expression without unit number. */
3389 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3391 dt->extra_comma = gfc_get_expr ();
3393 /* Set the types to something compatible with iokind. This is needed to
3394 get through gfc_free_expr later since iokind really has no Basic Type,
3396 dt->extra_comma->expr_type = EXPR_CONSTANT;
3397 dt->extra_comma->ts.type = BT_LOGICAL;
3399 /* Save the iokind and locus for later use in resolution. */
3400 dt->extra_comma->value.iokind = k;
3401 dt->extra_comma->where = gfc_current_locus;
3405 if (gfc_match_eos () != MATCH_YES)
3407 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3409 gfc_error ("Expected comma in I/O list at %C");
3414 m = match_io_list (k, &io_code);
3415 if (m == MATCH_ERROR)
3421 /* A full IO statement has been matched. Check the constraints. spec_end is
3422 supplied for cases where no locus is supplied. */
3423 m = check_io_constraints (k, dt, io_code, &spec_end);
3425 if (m == MATCH_ERROR)
3428 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3430 new_st.block = gfc_get_code ();
3431 new_st.block->op = new_st.op;
3432 new_st.block->next = io_code;
3434 terminate_io (io_code);
3439 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3449 gfc_match_read (void)
3451 return match_io (M_READ);
3456 gfc_match_write (void)
3458 return match_io (M_WRITE);
3463 gfc_match_print (void)
3467 m = match_io (M_PRINT);
3471 if (gfc_pure (NULL))
3473 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3481 /* Free a gfc_inquire structure. */
3484 gfc_free_inquire (gfc_inquire *inquire)
3487 if (inquire == NULL)
3490 gfc_free_expr (inquire->unit);
3491 gfc_free_expr (inquire->file);
3492 gfc_free_expr (inquire->iomsg);
3493 gfc_free_expr (inquire->iostat);
3494 gfc_free_expr (inquire->exist);
3495 gfc_free_expr (inquire->opened);
3496 gfc_free_expr (inquire->number);
3497 gfc_free_expr (inquire->named);
3498 gfc_free_expr (inquire->name);
3499 gfc_free_expr (inquire->access);
3500 gfc_free_expr (inquire->sequential);
3501 gfc_free_expr (inquire->direct);
3502 gfc_free_expr (inquire->form);
3503 gfc_free_expr (inquire->formatted);
3504 gfc_free_expr (inquire->unformatted);
3505 gfc_free_expr (inquire->recl);
3506 gfc_free_expr (inquire->nextrec);
3507 gfc_free_expr (inquire->blank);
3508 gfc_free_expr (inquire->position);
3509 gfc_free_expr (inquire->action);
3510 gfc_free_expr (inquire->read);
3511 gfc_free_expr (inquire->write);
3512 gfc_free_expr (inquire->readwrite);
3513 gfc_free_expr (inquire->delim);
3514 gfc_free_expr (inquire->encoding);
3515 gfc_free_expr (inquire->pad);
3516 gfc_free_expr (inquire->iolength);
3517 gfc_free_expr (inquire->convert);
3518 gfc_free_expr (inquire->strm_pos);
3519 gfc_free_expr (inquire->asynchronous);
3520 gfc_free_expr (inquire->pending);
3521 gfc_free_expr (inquire->id);
3522 gfc_free_expr (inquire->sign);
3523 gfc_free_expr (inquire->round);
3528 /* Match an element of an INQUIRE statement. */
3530 #define RETM if (m != MATCH_NO) return m;
3533 match_inquire_element (gfc_inquire *inquire)
3537 m = match_etag (&tag_unit, &inquire->unit);
3538 RETM m = match_etag (&tag_file, &inquire->file);
3539 RETM m = match_ltag (&tag_err, &inquire->err);
3540 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3541 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3542 RETM m = match_vtag (&tag_exist, &inquire->exist);
3543 RETM m = match_vtag (&tag_opened, &inquire->opened);
3544 RETM m = match_vtag (&tag_named, &inquire->named);
3545 RETM m = match_vtag (&tag_name, &inquire->name);
3546 RETM m = match_out_tag (&tag_number, &inquire->number);
3547 RETM m = match_vtag (&tag_s_access, &inquire->access);
3548 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3549 RETM m = match_vtag (&tag_direct, &inquire->direct);
3550 RETM m = match_vtag (&tag_s_form, &inquire->form);
3551 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3552 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3553 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3554 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3555 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3556 RETM m = match_vtag (&tag_s_position, &inquire->position);
3557 RETM m = match_vtag (&tag_s_action, &inquire->action);
3558 RETM m = match_vtag (&tag_read, &inquire->read);
3559 RETM m = match_vtag (&tag_write, &inquire->write);
3560 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3561 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3562 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3563 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3564 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3565 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3566 RETM m = match_vtag (&tag_s_round, &inquire->round);
3567 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3568 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3569 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3570 RETM m = match_vtag (&tag_convert, &inquire->convert);
3571 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3572 RETM m = match_vtag (&tag_pending, &inquire->pending);
3573 RETM m = match_vtag (&tag_id, &inquire->id);
3574 RETM return MATCH_NO;
3581 gfc_match_inquire (void)
3583 gfc_inquire *inquire;
3588 m = gfc_match_char ('(');
3592 inquire = XCNEW (gfc_inquire);
3594 loc = gfc_current_locus;
3596 m = match_inquire_element (inquire);
3597 if (m == MATCH_ERROR)
3601 m = gfc_match_expr (&inquire->unit);
3602 if (m == MATCH_ERROR)
3608 /* See if we have the IOLENGTH form of the inquire statement. */
3609 if (inquire->iolength != NULL)
3611 if (gfc_match_char (')') != MATCH_YES)
3614 m = match_io_list (M_INQUIRE, &code);
3615 if (m == MATCH_ERROR)
3620 new_st.op = EXEC_IOLENGTH;
3621 new_st.expr = inquire->iolength;
3622 new_st.ext.inquire = inquire;
3624 if (gfc_pure (NULL))
3626 gfc_free_statements (code);
3627 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3631 new_st.block = gfc_get_code ();
3632 new_st.block->op = EXEC_IOLENGTH;
3633 terminate_io (code);
3634 new_st.block->next = code;
3638 /* At this point, we have the non-IOLENGTH inquire statement. */
3641 if (gfc_match_char (')') == MATCH_YES)
3643 if (gfc_match_char (',') != MATCH_YES)
3646 m = match_inquire_element (inquire);
3647 if (m == MATCH_ERROR)
3652 if (inquire->iolength != NULL)
3654 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3659 if (gfc_match_eos () != MATCH_YES)
3662 if (inquire->unit != NULL && inquire->file != NULL)
3664 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3665 "UNIT specifiers", &loc);
3669 if (inquire->unit == NULL && inquire->file == NULL)
3671 gfc_error ("INQUIRE statement at %L requires either FILE or "
3672 "UNIT specifier", &loc);
3676 if (gfc_pure (NULL))
3678 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3682 if (inquire->id != NULL && inquire->pending == NULL)
3684 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
3685 "the ID= specifier", &loc);
3689 new_st.op = EXEC_INQUIRE;
3690 new_st.ext.inquire = inquire;
3694 gfc_syntax_error (ST_INQUIRE);
3697 gfc_free_inquire (inquire);
3702 /* Resolve everything in a gfc_inquire structure. */
3705 gfc_resolve_inquire (gfc_inquire *inquire)
3707 RESOLVE_TAG (&tag_unit, inquire->unit);
3708 RESOLVE_TAG (&tag_file, inquire->file);
3709 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3710 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3711 RESOLVE_TAG (&tag_exist, inquire->exist);
3712 RESOLVE_TAG (&tag_opened, inquire->opened);
3713 RESOLVE_TAG (&tag_number, inquire->number);
3714 RESOLVE_TAG (&tag_named, inquire->named);
3715 RESOLVE_TAG (&tag_name, inquire->name);
3716 RESOLVE_TAG (&tag_s_access, inquire->access);
3717 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3718 RESOLVE_TAG (&tag_direct, inquire->direct);
3719 RESOLVE_TAG (&tag_s_form, inquire->form);
3720 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3721 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3722 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3723 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3724 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3725 RESOLVE_TAG (&tag_s_position, inquire->position);
3726 RESOLVE_TAG (&tag_s_action, inquire->action);
3727 RESOLVE_TAG (&tag_read, inquire->read);
3728 RESOLVE_TAG (&tag_write, inquire->write);
3729 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3730 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3731 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3732 RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
3733 RESOLVE_TAG (&tag_s_round, inquire->round);
3734 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3735 RESOLVE_TAG (&tag_convert, inquire->convert);
3736 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3737 RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
3738 RESOLVE_TAG (&tag_s_sign, inquire->sign);
3739 RESOLVE_TAG (&tag_s_round, inquire->round);
3740 RESOLVE_TAG (&tag_pending, inquire->pending);
3741 RESOLVE_TAG (&tag_id, inquire->id);
3743 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
3751 gfc_free_wait (gfc_wait *wait)
3756 gfc_free_expr (wait->unit);
3757 gfc_free_expr (wait->iostat);
3758 gfc_free_expr (wait->iomsg);
3759 gfc_free_expr (wait->id);
3764 gfc_resolve_wait (gfc_wait *wait)
3766 RESOLVE_TAG (&tag_unit, wait->unit);
3767 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
3768 RESOLVE_TAG (&tag_iostat, wait->iostat);
3769 RESOLVE_TAG (&tag_id, wait->id);
3771 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
3774 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
3780 /* Match an element of a WAIT statement. */
3782 #define RETM if (m != MATCH_NO) return m;
3785 match_wait_element (gfc_wait *wait)
3789 m = match_etag (&tag_unit, &wait->unit);
3790 RETM m = match_ltag (&tag_err, &wait->err);
3791 RETM m = match_ltag (&tag_end, &wait->eor);
3792 RETM m = match_ltag (&tag_eor, &wait->end);
3793 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
3794 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
3795 RETM m = match_etag (&tag_id, &wait->id);
3796 RETM return MATCH_NO;
3803 gfc_match_wait (void)
3809 m = gfc_match_char ('(');
3813 wait = XCNEW (gfc_wait);
3815 loc = gfc_current_locus;
3817 m = match_wait_element (wait);
3818 if (m == MATCH_ERROR)
3822 m = gfc_match_expr (&wait->unit);
3823 if (m == MATCH_ERROR)
3831 if (gfc_match_char (')') == MATCH_YES)
3833 if (gfc_match_char (',') != MATCH_YES)
3836 m = match_wait_element (wait);
3837 if (m == MATCH_ERROR)
3843 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
3844 "not allowed in Fortran 95") == FAILURE)
3847 if (gfc_pure (NULL))
3849 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
3853 new_st.op = EXEC_WAIT;
3854 new_st.ext.wait = wait;
3859 gfc_syntax_error (ST_WAIT);
3862 gfc_free_wait (wait);