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_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);
344 c = next_char_not_space (&error);
345 if (c != 'P' && c != 'S')
352 c = next_char_not_space (&error);
353 if (c == 'N' || c == 'Z')
414 c = next_char_not_space (&error);
415 if (c == 'N' || c == 'S')
442 c = next_char_not_space (&error);
445 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
446 "specifier not allowed at %C") == FAILURE)
452 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
453 "specifier not allowed at %C") == FAILURE)
480 /* Check a format statement. The format string, either from a FORMAT
481 statement or a constant in an I/O statement has already been parsed
482 by itself, and we are checking it for validity. The dual origin
483 means that the warning message is a little less than great. */
486 check_format (bool is_input)
488 const char *posint_required = _("Positive width required");
489 const char *nonneg_required = _("Nonnegative width required");
490 const char *unexpected_element = _("Unexpected element '%c' in format string"
492 const char *unexpected_end = _("Unexpected end of format string");
493 const char *zero_width = _("Zero width in format descriptor");
502 saved_token = FMT_NONE;
512 error = _("Missing leading left parenthesis");
520 goto finished; /* Empty format is legal */
524 /* In this state, the next thing has to be a format item. */
553 /* Signed integer can only precede a P format. */
559 error = _("Expected P edit descriptor");
566 /* P requires a prior number. */
567 error = _("P descriptor requires leading scale factor");
571 /* X requires a prior number if we're being pedantic. */
572 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
573 "requires leading space count at %C")
585 goto extension_optional_comma;
596 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %C")
599 if (t != FMT_RPAREN || level > 0)
601 gfc_warning ("$ should be the last specifier in format at %C");
602 goto optional_comma_1;
622 error = unexpected_end;
626 error = unexpected_element;
631 /* In this state, t must currently be a data descriptor.
632 Deal with things that can/must follow the descriptor. */
650 error = _("Repeat count cannot follow P descriptor");
665 error = _("Positive width required with T descriptor");
677 switch (gfc_notification_std (GFC_STD_GNU))
680 gfc_warning ("Extension: Missing positive width after L "
686 error = posint_required;
716 if (t == FMT_G && u == FMT_ZERO)
723 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: 'G0' in "
724 "format at %C") == FAILURE)
738 error = posint_required;
749 /* Warn if -std=legacy, otherwise error. */
750 if (gfc_option.warn_std != 0)
751 gfc_error_now ("Period required in format specifier at %C");
753 gfc_warning ("Period required in format specifier at %C");
761 if (u != FMT_ZERO && u != FMT_POSINT)
763 error = nonneg_required;
770 /* Look for optional exponent. */
785 error = _("Positive exponent width required");
796 if (t != FMT_ZERO && t != FMT_POSINT)
798 error = nonneg_required;
801 else if (is_input && t == FMT_ZERO)
803 error = posint_required;
812 /* Warn if -std=legacy, otherwise error. */
813 if (gfc_option.warn_std != 0)
814 gfc_error_now ("Period required in format specifier at %C");
816 gfc_warning ("Period required in format specifier at %C");
824 if (t != FMT_ZERO && t != FMT_POSINT)
826 error = nonneg_required;
833 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
834 gfc_warning ("The H format specifier at %C is"
835 " a Fortran 95 deleted feature");
837 if (mode == MODE_STRING)
839 format_string += value;
840 format_length -= value;
856 if (t != FMT_ZERO && t != FMT_POSINT)
858 error = nonneg_required;
861 else if (is_input && t == FMT_ZERO)
863 error = posint_required;
879 if (t != FMT_ZERO && t != FMT_POSINT)
881 error = nonneg_required;
889 error = unexpected_element;
894 /* Between a descriptor and what comes next. */
915 error = unexpected_end;
919 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
926 /* Optional comma is a weird between state where we've just finished
927 reading a colon, slash, dollar or P descriptor. */
944 /* Assume that we have another format item. */
951 extension_optional_comma:
952 /* As a GNU extension, permit a missing comma after a string literal. */
972 error = unexpected_end;
976 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
986 if (error == unexpected_element)
987 gfc_error (error, error_element, &format_locus);
989 gfc_error ("%s in format string at %L", error, &format_locus);
998 /* Given an expression node that is a constant string, see if it looks
999 like a format string. */
1002 check_format_string (gfc_expr *e, bool is_input)
1004 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
1008 format_string = e->value.character.string;
1010 /* More elaborate measures are needed to show where a problem is within a
1011 format string that has been calculated, but that's probably not worth the
1013 format_locus = e->where;
1015 return check_format (is_input);
1019 /************ Fortran 95 I/O statement matchers *************/
1021 /* Match a FORMAT statement. This amounts to actually parsing the
1022 format descriptors in order to correctly locate the end of the
1026 gfc_match_format (void)
1031 if (gfc_current_ns->proc_name
1032 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
1034 gfc_error ("Format statement in module main block at %C");
1038 if (gfc_statement_label == NULL)
1040 gfc_error ("Missing format label at %C");
1043 gfc_gobble_whitespace ();
1048 start = gfc_current_locus;
1050 if (check_format (false) == FAILURE)
1053 if (gfc_match_eos () != MATCH_YES)
1055 gfc_syntax_error (ST_FORMAT);
1059 /* The label doesn't get created until after the statement is done
1060 being matched, so we have to leave the string for later. */
1062 gfc_current_locus = start; /* Back to the beginning */
1065 new_st.op = EXEC_NOP;
1068 e->expr_type = EXPR_CONSTANT;
1069 e->ts.type = BT_CHARACTER;
1070 e->ts.kind = gfc_default_character_kind;
1072 e->value.character.string = format_string
1073 = gfc_get_wide_string (format_length + 1);
1074 e->value.character.length = format_length;
1075 gfc_statement_label->format = e;
1078 check_format (false); /* Guaranteed to succeed */
1079 gfc_match_eos (); /* Guaranteed to succeed */
1085 /* Match an expression I/O tag of some sort. */
1088 match_etag (const io_tag *tag, gfc_expr **v)
1093 m = gfc_match (tag->spec);
1097 m = gfc_match (tag->value, &result);
1100 gfc_error ("Invalid value for %s specification at %C", tag->name);
1106 gfc_error ("Duplicate %s specification at %C", tag->name);
1107 gfc_free_expr (result);
1116 /* Match a variable I/O tag of some sort. */
1119 match_vtag (const io_tag *tag, gfc_expr **v)
1124 m = gfc_match (tag->spec);
1128 m = gfc_match (tag->value, &result);
1131 gfc_error ("Invalid value for %s specification at %C", tag->name);
1137 gfc_error ("Duplicate %s specification at %C", tag->name);
1138 gfc_free_expr (result);
1142 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1144 gfc_error ("Variable %s cannot be INTENT(IN) at %C", tag->name);
1145 gfc_free_expr (result);
1149 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1151 gfc_error ("Variable %s cannot be assigned in PURE procedure at %C",
1153 gfc_free_expr (result);
1162 /* Match I/O tags that cause variables to become redefined. */
1165 match_out_tag (const io_tag *tag, gfc_expr **result)
1169 m = match_vtag (tag, result);
1171 gfc_check_do_variable ((*result)->symtree);
1177 /* Match a label I/O tag. */
1180 match_ltag (const io_tag *tag, gfc_st_label ** label)
1186 m = gfc_match (tag->spec);
1190 m = gfc_match (tag->value, label);
1193 gfc_error ("Invalid value for %s specification at %C", tag->name);
1199 gfc_error ("Duplicate %s label specification at %C", tag->name);
1203 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1210 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1213 resolve_tag_format (const gfc_expr *e)
1215 if (e->expr_type == EXPR_CONSTANT
1216 && (e->ts.type != BT_CHARACTER
1217 || e->ts.kind != gfc_default_character_kind))
1219 gfc_error ("Constant expression in FORMAT tag at %L must be "
1220 "of type default CHARACTER", &e->where);
1224 /* If e's rank is zero and e is not an element of an array, it should be
1225 of integer or character type. The integer variable should be
1227 if (e->symtree == NULL || e->symtree->n.sym->as == NULL
1228 || e->symtree->n.sym->as->rank == 0)
1230 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1232 gfc_error ("FORMAT tag at %L must be of type CHARACTER or INTEGER",
1236 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1238 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1239 "variable in FORMAT tag at %L", &e->where)
1242 if (e->symtree->n.sym->attr.assign != 1)
1244 gfc_error ("Variable '%s' at %L has not been assigned a "
1245 "format label", e->symtree->n.sym->name, &e->where);
1249 else if (e->ts.type == BT_INTEGER)
1251 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1252 "variable", gfc_basic_typename (e->ts.type), &e->where);
1259 /* If rank is nonzero, we allow the type to be character under GFC_STD_GNU
1260 and other type under GFC_STD_LEGACY. It may be assigned an Hollerith
1262 if (e->ts.type == BT_CHARACTER)
1264 if (gfc_notify_std (GFC_STD_GNU, "Extension: Character array "
1265 "in FORMAT tag at %L", &e->where) == FAILURE)
1270 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1271 "in FORMAT tag at %L", &e->where) == FAILURE)
1279 /* Do expression resolution and type-checking on an expression tag. */
1282 resolve_tag (const io_tag *tag, gfc_expr *e)
1287 if (gfc_resolve_expr (e) == FAILURE)
1290 if (tag == &tag_format)
1291 return resolve_tag_format (e);
1293 if (e->ts.type != tag->type)
1295 gfc_error ("%s tag at %L must be of type %s", tag->name,
1296 &e->where, gfc_basic_typename (tag->type));
1302 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1306 if (tag == &tag_iomsg)
1308 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1309 &e->where) == FAILURE)
1313 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1314 && e->ts.kind != gfc_default_integer_kind)
1316 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1317 "INTEGER in %s tag at %L", tag->name, &e->where)
1322 if (tag == &tag_convert)
1324 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1325 &e->where) == FAILURE)
1333 /* Match a single tag of an OPEN statement. */
1336 match_open_element (gfc_open *open)
1340 m = match_etag (&tag_e_async, &open->asynchronous);
1343 m = match_etag (&tag_unit, &open->unit);
1346 m = match_out_tag (&tag_iomsg, &open->iomsg);
1349 m = match_out_tag (&tag_iostat, &open->iostat);
1352 m = match_etag (&tag_file, &open->file);
1355 m = match_etag (&tag_status, &open->status);
1358 m = match_etag (&tag_e_access, &open->access);
1361 m = match_etag (&tag_e_form, &open->form);
1364 m = match_etag (&tag_e_recl, &open->recl);
1367 m = match_etag (&tag_e_blank, &open->blank);
1370 m = match_etag (&tag_e_position, &open->position);
1373 m = match_etag (&tag_e_action, &open->action);
1376 m = match_etag (&tag_e_delim, &open->delim);
1379 m = match_etag (&tag_e_pad, &open->pad);
1382 m = match_etag (&tag_e_decimal, &open->decimal);
1385 m = match_etag (&tag_e_encoding, &open->encoding);
1388 m = match_etag (&tag_e_round, &open->round);
1391 m = match_etag (&tag_e_sign, &open->sign);
1394 m = match_ltag (&tag_err, &open->err);
1397 m = match_etag (&tag_convert, &open->convert);
1405 /* Free the gfc_open structure and all the expressions it contains. */
1408 gfc_free_open (gfc_open *open)
1413 gfc_free_expr (open->unit);
1414 gfc_free_expr (open->iomsg);
1415 gfc_free_expr (open->iostat);
1416 gfc_free_expr (open->file);
1417 gfc_free_expr (open->status);
1418 gfc_free_expr (open->access);
1419 gfc_free_expr (open->form);
1420 gfc_free_expr (open->recl);
1421 gfc_free_expr (open->blank);
1422 gfc_free_expr (open->position);
1423 gfc_free_expr (open->action);
1424 gfc_free_expr (open->delim);
1425 gfc_free_expr (open->pad);
1426 gfc_free_expr (open->decimal);
1427 gfc_free_expr (open->encoding);
1428 gfc_free_expr (open->round);
1429 gfc_free_expr (open->sign);
1430 gfc_free_expr (open->convert);
1431 gfc_free_expr (open->asynchronous);
1436 /* Resolve everything in a gfc_open structure. */
1439 gfc_resolve_open (gfc_open *open)
1442 RESOLVE_TAG (&tag_unit, open->unit);
1443 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1444 RESOLVE_TAG (&tag_iostat, open->iostat);
1445 RESOLVE_TAG (&tag_file, open->file);
1446 RESOLVE_TAG (&tag_status, open->status);
1447 RESOLVE_TAG (&tag_e_access, open->access);
1448 RESOLVE_TAG (&tag_e_form, open->form);
1449 RESOLVE_TAG (&tag_e_recl, open->recl);
1450 RESOLVE_TAG (&tag_e_blank, open->blank);
1451 RESOLVE_TAG (&tag_e_position, open->position);
1452 RESOLVE_TAG (&tag_e_action, open->action);
1453 RESOLVE_TAG (&tag_e_delim, open->delim);
1454 RESOLVE_TAG (&tag_e_pad, open->pad);
1455 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1456 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1457 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1458 RESOLVE_TAG (&tag_e_round, open->round);
1459 RESOLVE_TAG (&tag_e_sign, open->sign);
1460 RESOLVE_TAG (&tag_convert, open->convert);
1462 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1469 /* Check if a given value for a SPECIFIER is either in the list of values
1470 allowed in F95 or F2003, issuing an error message and returning a zero
1471 value if it is not allowed. */
1474 compare_to_allowed_values (const char *specifier, const char *allowed[],
1475 const char *allowed_f2003[],
1476 const char *allowed_gnu[], gfc_char_t *value,
1477 const char *statement, bool warn)
1482 len = gfc_wide_strlen (value);
1485 for (len--; len > 0; len--)
1486 if (value[len] != ' ')
1491 for (i = 0; allowed[i]; i++)
1492 if (len == strlen (allowed[i])
1493 && gfc_wide_strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1496 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1497 if (len == strlen (allowed_f2003[i])
1498 && gfc_wide_strncasecmp (value, allowed_f2003[i],
1499 strlen (allowed_f2003[i])) == 0)
1501 notification n = gfc_notification_std (GFC_STD_F2003);
1503 if (n == WARNING || (warn && n == ERROR))
1505 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1506 "has value '%s'", specifier, statement,
1513 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1514 "%s statement at %C has value '%s'", specifier,
1515 statement, allowed_f2003[i]);
1523 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1524 if (len == strlen (allowed_gnu[i])
1525 && gfc_wide_strncasecmp (value, allowed_gnu[i],
1526 strlen (allowed_gnu[i])) == 0)
1528 notification n = gfc_notification_std (GFC_STD_GNU);
1530 if (n == WARNING || (warn && n == ERROR))
1532 gfc_warning ("Extension: %s specifier in %s statement at %C "
1533 "has value '%s'", specifier, statement,
1540 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1541 "%s statement at %C has value '%s'", specifier,
1542 statement, allowed_gnu[i]);
1552 char *s = gfc_widechar_to_char (value, -1);
1553 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1554 specifier, statement, s);
1560 char *s = gfc_widechar_to_char (value, -1);
1561 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1562 specifier, statement, s);
1569 /* Match an OPEN statement. */
1572 gfc_match_open (void)
1578 m = gfc_match_char ('(');
1582 open = XCNEW (gfc_open);
1584 m = match_open_element (open);
1586 if (m == MATCH_ERROR)
1590 m = gfc_match_expr (&open->unit);
1593 if (m == MATCH_ERROR)
1599 if (gfc_match_char (')') == MATCH_YES)
1601 if (gfc_match_char (',') != MATCH_YES)
1604 m = match_open_element (open);
1605 if (m == MATCH_ERROR)
1611 if (gfc_match_eos () == MATCH_NO)
1614 if (gfc_pure (NULL))
1616 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1620 warn = (open->err || open->iostat) ? true : false;
1621 /* Checks on the ACCESS specifier. */
1622 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1624 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1625 static const char *access_f2003[] = { "STREAM", NULL };
1626 static const char *access_gnu[] = { "APPEND", NULL };
1628 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1630 open->access->value.character.string,
1635 /* Checks on the ACTION specifier. */
1636 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1638 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1640 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1641 open->action->value.character.string,
1646 /* Checks on the ASYNCHRONOUS specifier. */
1647 if (open->asynchronous)
1649 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1650 "not allowed in Fortran 95") == FAILURE)
1653 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1655 static const char * asynchronous[] = { "YES", "NO", NULL };
1657 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1658 NULL, NULL, open->asynchronous->value.character.string,
1664 /* Checks on the BLANK specifier. */
1667 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1668 "not allowed in Fortran 95") == FAILURE)
1671 if (open->blank->expr_type == EXPR_CONSTANT)
1673 static const char *blank[] = { "ZERO", "NULL", NULL };
1675 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1676 open->blank->value.character.string,
1682 /* Checks on the DECIMAL specifier. */
1685 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1686 "not allowed in Fortran 95") == FAILURE)
1689 if (open->decimal->expr_type == EXPR_CONSTANT)
1691 static const char * decimal[] = { "COMMA", "POINT", NULL };
1693 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1694 open->decimal->value.character.string,
1700 /* Checks on the DELIM specifier. */
1703 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1704 "not allowed in Fortran 95") == FAILURE)
1707 if (open->delim->expr_type == EXPR_CONSTANT)
1709 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1711 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1712 open->delim->value.character.string,
1718 /* Checks on the ENCODING specifier. */
1721 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1722 "not allowed in Fortran 95") == FAILURE)
1725 if (open->encoding->expr_type == EXPR_CONSTANT)
1727 static const char * encoding[] = { "DEFAULT", "UTF-8", NULL };
1729 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1730 open->encoding->value.character.string,
1736 /* Checks on the FORM specifier. */
1737 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1739 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1741 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1742 open->form->value.character.string,
1747 /* Checks on the PAD specifier. */
1748 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1750 static const char *pad[] = { "YES", "NO", NULL };
1752 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1753 open->pad->value.character.string,
1758 /* Checks on the POSITION specifier. */
1759 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1761 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1763 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1764 open->position->value.character.string,
1769 /* Checks on the ROUND specifier. */
1772 /* When implemented, change the following to use gfc_notify_std F2003. */
1773 gfc_error ("Fortran F2003: ROUND= specifier at %C not implemented");
1776 if (open->round->expr_type == EXPR_CONSTANT)
1778 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1779 "COMPATIBLE", "PROCESSOR_DEFINED",
1782 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1783 open->round->value.character.string,
1789 /* Checks on the SIGN specifier. */
1792 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
1793 "not allowed in Fortran 95") == FAILURE)
1796 if (open->sign->expr_type == EXPR_CONSTANT)
1798 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
1801 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
1802 open->sign->value.character.string,
1808 #define warn_or_error(...) \
1811 gfc_warning (__VA_ARGS__); \
1814 gfc_error (__VA_ARGS__); \
1819 /* Checks on the RECL specifier. */
1820 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
1821 && open->recl->ts.type == BT_INTEGER
1822 && mpz_sgn (open->recl->value.integer) != 1)
1824 warn_or_error ("RECL in OPEN statement at %C must be positive");
1827 /* Checks on the STATUS specifier. */
1828 if (open->status && open->status->expr_type == EXPR_CONSTANT)
1830 static const char *status[] = { "OLD", "NEW", "SCRATCH",
1831 "REPLACE", "UNKNOWN", NULL };
1833 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1834 open->status->value.character.string,
1838 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
1839 the FILE= specifier shall appear. */
1840 if (open->file == NULL
1841 && (gfc_wide_strncasecmp (open->status->value.character.string,
1843 || gfc_wide_strncasecmp (open->status->value.character.string,
1846 char *s = gfc_widechar_to_char (open->status->value.character.string,
1848 warn_or_error ("The STATUS specified in OPEN statement at %C is "
1849 "'%s' and no FILE specifier is present", s);
1853 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
1854 the FILE= specifier shall not appear. */
1855 if (gfc_wide_strncasecmp (open->status->value.character.string,
1856 "scratch", 7) == 0 && open->file)
1858 warn_or_error ("The STATUS specified in OPEN statement at %C "
1859 "cannot have the value SCRATCH if a FILE specifier "
1864 /* Things that are not allowed for unformatted I/O. */
1865 if (open->form && open->form->expr_type == EXPR_CONSTANT
1866 && (open->delim || open->decimal || open->encoding || open->round
1867 || open->sign || open->pad || open->blank)
1868 && gfc_wide_strncasecmp (open->form->value.character.string,
1869 "unformatted", 11) == 0)
1871 const char *spec = (open->delim ? "DELIM "
1872 : (open->pad ? "PAD " : open->blank
1875 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
1876 "unformatted I/O", spec);
1879 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
1880 && gfc_wide_strncasecmp (open->access->value.character.string,
1883 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
1888 && open->access && open->access->expr_type == EXPR_CONSTANT
1889 && !(gfc_wide_strncasecmp (open->access->value.character.string,
1890 "sequential", 10) == 0
1891 || gfc_wide_strncasecmp (open->access->value.character.string,
1893 || gfc_wide_strncasecmp (open->access->value.character.string,
1896 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
1897 "for stream or sequential ACCESS");
1900 #undef warn_or_error
1902 new_st.op = EXEC_OPEN;
1903 new_st.ext.open = open;
1907 gfc_syntax_error (ST_OPEN);
1910 gfc_free_open (open);
1915 /* Free a gfc_close structure an all its expressions. */
1918 gfc_free_close (gfc_close *close)
1923 gfc_free_expr (close->unit);
1924 gfc_free_expr (close->iomsg);
1925 gfc_free_expr (close->iostat);
1926 gfc_free_expr (close->status);
1931 /* Match elements of a CLOSE statement. */
1934 match_close_element (gfc_close *close)
1938 m = match_etag (&tag_unit, &close->unit);
1941 m = match_etag (&tag_status, &close->status);
1944 m = match_out_tag (&tag_iomsg, &close->iomsg);
1947 m = match_out_tag (&tag_iostat, &close->iostat);
1950 m = match_ltag (&tag_err, &close->err);
1958 /* Match a CLOSE statement. */
1961 gfc_match_close (void)
1967 m = gfc_match_char ('(');
1971 close = XCNEW (gfc_close);
1973 m = match_close_element (close);
1975 if (m == MATCH_ERROR)
1979 m = gfc_match_expr (&close->unit);
1982 if (m == MATCH_ERROR)
1988 if (gfc_match_char (')') == MATCH_YES)
1990 if (gfc_match_char (',') != MATCH_YES)
1993 m = match_close_element (close);
1994 if (m == MATCH_ERROR)
2000 if (gfc_match_eos () == MATCH_NO)
2003 if (gfc_pure (NULL))
2005 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
2009 warn = (close->iostat || close->err) ? true : false;
2011 /* Checks on the STATUS specifier. */
2012 if (close->status && close->status->expr_type == EXPR_CONSTANT)
2014 static const char *status[] = { "KEEP", "DELETE", NULL };
2016 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2017 close->status->value.character.string,
2022 new_st.op = EXEC_CLOSE;
2023 new_st.ext.close = close;
2027 gfc_syntax_error (ST_CLOSE);
2030 gfc_free_close (close);
2035 /* Resolve everything in a gfc_close structure. */
2038 gfc_resolve_close (gfc_close *close)
2040 RESOLVE_TAG (&tag_unit, close->unit);
2041 RESOLVE_TAG (&tag_iomsg, close->iomsg);
2042 RESOLVE_TAG (&tag_iostat, close->iostat);
2043 RESOLVE_TAG (&tag_status, close->status);
2045 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
2052 /* Free a gfc_filepos structure. */
2055 gfc_free_filepos (gfc_filepos *fp)
2057 gfc_free_expr (fp->unit);
2058 gfc_free_expr (fp->iomsg);
2059 gfc_free_expr (fp->iostat);
2064 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
2067 match_file_element (gfc_filepos *fp)
2071 m = match_etag (&tag_unit, &fp->unit);
2074 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2077 m = match_out_tag (&tag_iostat, &fp->iostat);
2080 m = match_ltag (&tag_err, &fp->err);
2088 /* Match the second half of the file-positioning statements, REWIND,
2089 BACKSPACE, ENDFILE, or the FLUSH statement. */
2092 match_filepos (gfc_statement st, gfc_exec_op op)
2097 fp = XCNEW (gfc_filepos);
2099 if (gfc_match_char ('(') == MATCH_NO)
2101 m = gfc_match_expr (&fp->unit);
2102 if (m == MATCH_ERROR)
2110 m = match_file_element (fp);
2111 if (m == MATCH_ERROR)
2115 m = gfc_match_expr (&fp->unit);
2116 if (m == MATCH_ERROR)
2124 if (gfc_match_char (')') == MATCH_YES)
2126 if (gfc_match_char (',') != MATCH_YES)
2129 m = match_file_element (fp);
2130 if (m == MATCH_ERROR)
2137 if (gfc_match_eos () != MATCH_YES)
2140 if (gfc_pure (NULL))
2142 gfc_error ("%s statement not allowed in PURE procedure at %C",
2143 gfc_ascii_statement (st));
2149 new_st.ext.filepos = fp;
2153 gfc_syntax_error (st);
2156 gfc_free_filepos (fp);
2162 gfc_resolve_filepos (gfc_filepos *fp)
2164 RESOLVE_TAG (&tag_unit, fp->unit);
2165 RESOLVE_TAG (&tag_iostat, fp->iostat);
2166 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2167 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2174 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2175 and the FLUSH statement. */
2178 gfc_match_endfile (void)
2180 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2184 gfc_match_backspace (void)
2186 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2190 gfc_match_rewind (void)
2192 return match_filepos (ST_REWIND, EXEC_REWIND);
2196 gfc_match_flush (void)
2198 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2202 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2205 /******************** Data Transfer Statements *********************/
2207 /* Return a default unit number. */
2210 default_unit (io_kind k)
2219 return gfc_int_expr (unit);
2223 /* Match a unit specification for a data transfer statement. */
2226 match_dt_unit (io_kind k, gfc_dt *dt)
2230 if (gfc_match_char ('*') == MATCH_YES)
2232 if (dt->io_unit != NULL)
2235 dt->io_unit = default_unit (k);
2239 if (gfc_match_expr (&e) == MATCH_YES)
2241 if (dt->io_unit != NULL)
2254 gfc_error ("Duplicate UNIT specification at %C");
2259 /* Match a format specification. */
2262 match_dt_format (gfc_dt *dt)
2266 gfc_st_label *label;
2269 where = gfc_current_locus;
2271 if (gfc_match_char ('*') == MATCH_YES)
2273 if (dt->format_expr != NULL || dt->format_label != NULL)
2276 dt->format_label = &format_asterisk;
2280 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2282 if (dt->format_expr != NULL || dt->format_label != NULL)
2284 gfc_free_st_label (label);
2288 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2291 dt->format_label = label;
2294 else if (m == MATCH_ERROR)
2295 /* The label was zero or too large. Emit the correct diagnosis. */
2298 if (gfc_match_expr (&e) == MATCH_YES)
2300 if (dt->format_expr != NULL || dt->format_label != NULL)
2305 dt->format_expr = e;
2309 gfc_current_locus = where; /* The only case where we have to restore */
2314 gfc_error ("Duplicate format specification at %C");
2319 /* Traverse a namelist that is part of a READ statement to make sure
2320 that none of the variables in the namelist are INTENT(IN). Returns
2321 nonzero if we find such a variable. */
2324 check_namelist (gfc_symbol *sym)
2328 for (p = sym->namelist; p; p = p->next)
2329 if (p->sym->attr.intent == INTENT_IN)
2331 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2332 p->sym->name, sym->name);
2340 /* Match a single data transfer element. */
2343 match_dt_element (io_kind k, gfc_dt *dt)
2345 char name[GFC_MAX_SYMBOL_LEN + 1];
2349 if (gfc_match (" unit =") == MATCH_YES)
2351 m = match_dt_unit (k, dt);
2356 if (gfc_match (" fmt =") == MATCH_YES)
2358 m = match_dt_format (dt);
2363 if (gfc_match (" nml = %n", name) == MATCH_YES)
2365 if (dt->namelist != NULL)
2367 gfc_error ("Duplicate NML specification at %C");
2371 if (gfc_find_symbol (name, NULL, 1, &sym))
2374 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2376 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2377 sym != NULL ? sym->name : name);
2382 if (k == M_READ && check_namelist (sym))
2388 m = match_etag (&tag_e_async, &dt->asynchronous);
2391 m = match_etag (&tag_e_blank, &dt->blank);
2394 m = match_etag (&tag_e_delim, &dt->delim);
2397 m = match_etag (&tag_e_pad, &dt->pad);
2400 m = match_etag (&tag_e_sign, &dt->sign);
2403 m = match_etag (&tag_e_round, &dt->round);
2406 m = match_out_tag (&tag_id, &dt->id);
2409 m = match_etag (&tag_e_decimal, &dt->decimal);
2412 m = match_etag (&tag_rec, &dt->rec);
2415 m = match_etag (&tag_spos, &dt->rec);
2418 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2421 m = match_out_tag (&tag_iostat, &dt->iostat);
2424 m = match_ltag (&tag_err, &dt->err);
2426 dt->err_where = gfc_current_locus;
2429 m = match_etag (&tag_advance, &dt->advance);
2432 m = match_out_tag (&tag_size, &dt->size);
2436 m = match_ltag (&tag_end, &dt->end);
2441 gfc_error ("END tag at %C not allowed in output statement");
2444 dt->end_where = gfc_current_locus;
2449 m = match_ltag (&tag_eor, &dt->eor);
2451 dt->eor_where = gfc_current_locus;
2459 /* Free a data transfer structure and everything below it. */
2462 gfc_free_dt (gfc_dt *dt)
2467 gfc_free_expr (dt->io_unit);
2468 gfc_free_expr (dt->format_expr);
2469 gfc_free_expr (dt->rec);
2470 gfc_free_expr (dt->advance);
2471 gfc_free_expr (dt->iomsg);
2472 gfc_free_expr (dt->iostat);
2473 gfc_free_expr (dt->size);
2474 gfc_free_expr (dt->pad);
2475 gfc_free_expr (dt->delim);
2476 gfc_free_expr (dt->sign);
2477 gfc_free_expr (dt->round);
2478 gfc_free_expr (dt->blank);
2479 gfc_free_expr (dt->decimal);
2480 gfc_free_expr (dt->extra_comma);
2485 /* Resolve everything in a gfc_dt structure. */
2488 gfc_resolve_dt (gfc_dt *dt)
2492 RESOLVE_TAG (&tag_format, dt->format_expr);
2493 RESOLVE_TAG (&tag_rec, dt->rec);
2494 RESOLVE_TAG (&tag_spos, dt->rec);
2495 RESOLVE_TAG (&tag_advance, dt->advance);
2496 RESOLVE_TAG (&tag_id, dt->id);
2497 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2498 RESOLVE_TAG (&tag_iostat, dt->iostat);
2499 RESOLVE_TAG (&tag_size, dt->size);
2500 RESOLVE_TAG (&tag_e_pad, dt->pad);
2501 RESOLVE_TAG (&tag_e_delim, dt->delim);
2502 RESOLVE_TAG (&tag_e_sign, dt->sign);
2503 RESOLVE_TAG (&tag_e_round, dt->round);
2504 RESOLVE_TAG (&tag_e_blank, dt->blank);
2505 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2506 RESOLVE_TAG (&tag_e_async, dt->asynchronous);
2509 if (gfc_resolve_expr (e) == SUCCESS
2510 && (e->ts.type != BT_INTEGER
2511 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2513 /* If there is no extra comma signifying the "format" form of the IO
2514 statement, then this must be an error. */
2515 if (!dt->extra_comma)
2517 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2518 "or a CHARACTER variable", &e->where);
2523 /* At this point, we have an extra comma. If io_unit has arrived as
2524 type character, we assume its really the "format" form of the I/O
2525 statement. We set the io_unit to the default unit and format to
2526 the character expression. See F95 Standard section 9.4. */
2528 k = dt->extra_comma->value.iokind;
2529 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2531 dt->format_expr = dt->io_unit;
2532 dt->io_unit = default_unit (k);
2534 /* Free this pointer now so that a warning/error is not triggered
2535 below for the "Extension". */
2536 gfc_free_expr (dt->extra_comma);
2537 dt->extra_comma = NULL;
2542 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2543 &dt->extra_comma->where);
2549 if (e->ts.type == BT_CHARACTER)
2551 if (gfc_has_vector_index (e))
2553 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2558 if (e->rank && e->ts.type != BT_CHARACTER)
2560 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2565 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2566 "item list at %L", &dt->extra_comma->where) == FAILURE)
2571 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2573 if (dt->err->defined == ST_LABEL_UNKNOWN)
2575 gfc_error ("ERR tag label %d at %L not defined",
2576 dt->err->value, &dt->err_where);
2583 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2585 if (dt->end->defined == ST_LABEL_UNKNOWN)
2587 gfc_error ("END tag label %d at %L not defined",
2588 dt->end->value, &dt->end_where);
2595 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2597 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2599 gfc_error ("EOR tag label %d at %L not defined",
2600 dt->eor->value, &dt->eor_where);
2605 /* Check the format label actually exists. */
2606 if (dt->format_label && dt->format_label != &format_asterisk
2607 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2609 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2610 &dt->format_label->where);
2617 /* Given an io_kind, return its name. */
2620 io_kind_name (io_kind k)
2639 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2646 /* Match an IO iteration statement of the form:
2648 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2650 which is equivalent to a single IO element. This function is
2651 mutually recursive with match_io_element(). */
2653 static match match_io_element (io_kind, gfc_code **);
2656 match_io_iterator (io_kind k, gfc_code **result)
2658 gfc_code *head, *tail, *new_code;
2666 old_loc = gfc_current_locus;
2668 if (gfc_match_char ('(') != MATCH_YES)
2671 m = match_io_element (k, &head);
2674 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2680 /* Can't be anything but an IO iterator. Build a list. */
2681 iter = gfc_get_iterator ();
2685 m = gfc_match_iterator (iter, 0);
2686 if (m == MATCH_ERROR)
2690 gfc_check_do_variable (iter->var->symtree);
2694 m = match_io_element (k, &new_code);
2695 if (m == MATCH_ERROR)
2704 tail = gfc_append_code (tail, new_code);
2706 if (gfc_match_char (',') != MATCH_YES)
2715 if (gfc_match_char (')') != MATCH_YES)
2718 new_code = gfc_get_code ();
2719 new_code->op = EXEC_DO;
2720 new_code->ext.iterator = iter;
2722 new_code->block = gfc_get_code ();
2723 new_code->block->op = EXEC_DO;
2724 new_code->block->next = head;
2730 gfc_error ("Syntax error in I/O iterator at %C");
2734 gfc_free_iterator (iter, 1);
2735 gfc_free_statements (head);
2736 gfc_current_locus = old_loc;
2741 /* Match a single element of an IO list, which is either a single
2742 expression or an IO Iterator. */
2745 match_io_element (io_kind k, gfc_code **cpp)
2753 m = match_io_iterator (k, cpp);
2759 m = gfc_match_variable (&expr, 0);
2761 gfc_error ("Expected variable in READ statement at %C");
2765 m = gfc_match_expr (&expr);
2767 gfc_error ("Expected expression in %s statement at %C",
2775 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2777 gfc_error ("Variable '%s' in input list at %C cannot be "
2778 "INTENT(IN)", expr->symtree->n.sym->name);
2783 && gfc_impure_variable (expr->symtree->n.sym)
2784 && current_dt->io_unit->ts.type == BT_CHARACTER)
2786 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2787 expr->symtree->n.sym->name);
2791 if (gfc_check_do_variable (expr->symtree))
2797 if (current_dt->io_unit->ts.type == BT_CHARACTER
2799 && current_dt->io_unit->expr_type == EXPR_VARIABLE
2800 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
2802 gfc_error ("Cannot write to internal file unit '%s' at %C "
2803 "inside a PURE procedure",
2804 current_dt->io_unit->symtree->n.sym->name);
2816 gfc_free_expr (expr);
2820 cp = gfc_get_code ();
2821 cp->op = EXEC_TRANSFER;
2829 /* Match an I/O list, building gfc_code structures as we go. */
2832 match_io_list (io_kind k, gfc_code **head_p)
2834 gfc_code *head, *tail, *new_code;
2837 *head_p = head = tail = NULL;
2838 if (gfc_match_eos () == MATCH_YES)
2843 m = match_io_element (k, &new_code);
2844 if (m == MATCH_ERROR)
2849 tail = gfc_append_code (tail, new_code);
2853 if (gfc_match_eos () == MATCH_YES)
2855 if (gfc_match_char (',') != MATCH_YES)
2863 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2866 gfc_free_statements (head);
2871 /* Attach the data transfer end node. */
2874 terminate_io (gfc_code *io_code)
2878 if (io_code == NULL)
2879 io_code = new_st.block;
2881 c = gfc_get_code ();
2882 c->op = EXEC_DT_END;
2884 /* Point to structure that is already there */
2885 c->ext.dt = new_st.ext.dt;
2886 gfc_append_code (io_code, c);
2890 /* Check the constraints for a data transfer statement. The majority of the
2891 constraints appearing in 9.4 of the standard appear here. Some are handled
2892 in resolve_tag and others in gfc_resolve_dt. */
2895 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
2898 #define io_constraint(condition,msg,arg)\
2901 gfc_error(msg,arg);\
2907 gfc_symbol *sym = NULL;
2908 bool warn, unformatted;
2910 warn = (dt->err || dt->iostat) ? true : false;
2911 unformatted = dt->format_expr == NULL && dt->format_label == NULL
2912 && dt->namelist == NULL;
2917 if (expr && expr->expr_type == EXPR_VARIABLE
2918 && expr->ts.type == BT_CHARACTER)
2920 sym = expr->symtree->n.sym;
2922 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
2923 "Internal file at %L must not be INTENT(IN)",
2926 io_constraint (gfc_has_vector_index (dt->io_unit),
2927 "Internal file incompatible with vector subscript at %L",
2930 io_constraint (dt->rec != NULL,
2931 "REC tag at %L is incompatible with internal file",
2934 io_constraint (unformatted,
2935 "Unformatted I/O not allowed with internal unit at %L",
2936 &dt->io_unit->where);
2938 io_constraint (dt->asynchronous != NULL,
2939 "ASYNCHRONOUS tag at %L not allowed with internal file",
2940 &dt->asynchronous->where);
2942 if (dt->namelist != NULL)
2944 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
2945 "at %L with namelist", &expr->where)
2950 io_constraint (dt->advance != NULL,
2951 "ADVANCE tag at %L is incompatible with internal file",
2952 &dt->advance->where);
2955 if (expr && expr->ts.type != BT_CHARACTER)
2958 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
2959 "IO UNIT in %s statement at %C must be "
2960 "an internal file in a PURE procedure",
2966 io_constraint (dt->end, "END tag not allowed with output at %L",
2969 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
2972 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
2975 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
2978 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
2983 io_constraint (dt->size && dt->advance == NULL,
2984 "SIZE tag at %L requires an ADVANCE tag",
2987 io_constraint (dt->eor && dt->advance == NULL,
2988 "EOR tag at %L requires an ADVANCE tag",
2992 if (dt->asynchronous)
2994 static const char * asynchronous[] = { "YES", "NO", NULL };
2996 if (gfc_reduce_init_expr (dt->asynchronous) != SUCCESS)
2998 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
2999 "expression", &dt->asynchronous->where);
3003 if (!compare_to_allowed_values
3004 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
3005 dt->asynchronous->value.character.string,
3006 io_kind_name (k), warn))
3014 || gfc_wide_strlen (dt->asynchronous->value.character.string) != 3
3015 || gfc_wide_strncasecmp (dt->asynchronous->value.character.string,
3017 io_constraint (not_yes,
3018 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
3019 "specifier", &dt->id->where);
3024 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
3025 "not allowed in Fortran 95") == FAILURE)
3028 if (dt->decimal->expr_type == EXPR_CONSTANT)
3030 static const char * decimal[] = { "COMMA", "POINT", NULL };
3032 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
3033 dt->decimal->value.character.string,
3034 io_kind_name (k), warn))
3037 io_constraint (unformatted,
3038 "the DECIMAL= specifier at %L must be with an "
3039 "explicit format expression", &dt->decimal->where);
3045 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
3046 "not allowed in Fortran 95") == FAILURE)
3049 if (dt->blank->expr_type == EXPR_CONSTANT)
3051 static const char * blank[] = { "NULL", "ZERO", NULL };
3053 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
3054 dt->blank->value.character.string,
3055 io_kind_name (k), warn))
3058 io_constraint (unformatted,
3059 "the BLANK= specifier at %L must be with an "
3060 "explicit format expression", &dt->blank->where);
3066 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
3067 "not allowed in Fortran 95") == FAILURE)
3070 if (dt->pad->expr_type == EXPR_CONSTANT)
3072 static const char * pad[] = { "YES", "NO", NULL };
3074 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3075 dt->pad->value.character.string,
3076 io_kind_name (k), warn))
3079 io_constraint (unformatted,
3080 "the PAD= specifier at %L must be with an "
3081 "explicit format expression", &dt->pad->where);
3087 /* When implemented, change the following to use gfc_notify_std F2003.
3088 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3089 "not allowed in Fortran 95") == FAILURE)
3090 return MATCH_ERROR; */
3091 gfc_error ("F2003 Feature: ROUND= specifier at %C not implemented");
3094 if (dt->round->expr_type == EXPR_CONSTANT)
3096 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3097 "COMPATIBLE", "PROCESSOR_DEFINED",
3100 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3101 dt->round->value.character.string,
3102 io_kind_name (k), warn))
3109 /* When implemented, change the following to use gfc_notify_std F2003.
3110 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3111 "not allowed in Fortran 95") == FAILURE)
3112 return MATCH_ERROR; */
3113 if (dt->sign->expr_type == EXPR_CONSTANT)
3115 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3118 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3119 dt->sign->value.character.string,
3120 io_kind_name (k), warn))
3123 io_constraint (unformatted,
3124 "SIGN= specifier at %L must be with an "
3125 "explicit format expression", &dt->sign->where);
3127 io_constraint (k == M_READ,
3128 "SIGN= specifier at %L not allowed in a "
3129 "READ statement", &dt->sign->where);
3135 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3136 "not allowed in Fortran 95") == FAILURE)
3139 if (dt->delim->expr_type == EXPR_CONSTANT)
3141 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3143 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3144 dt->delim->value.character.string,
3145 io_kind_name (k), warn))
3148 io_constraint (k == M_READ,
3149 "DELIM= specifier at %L not allowed in a "
3150 "READ statement", &dt->delim->where);
3152 io_constraint (dt->format_label != &format_asterisk
3153 && dt->namelist == NULL,
3154 "DELIM= specifier at %L must have FMT=*",
3157 io_constraint (unformatted && dt->namelist == NULL,
3158 "DELIM= specifier at %L must be with FMT=* or "
3159 "NML= specifier ", &dt->delim->where);
3165 io_constraint (io_code && dt->namelist,
3166 "NAMELIST cannot be followed by IO-list at %L",
3169 io_constraint (dt->format_expr,
3170 "IO spec-list cannot contain both NAMELIST group name "
3171 "and format specification at %L.",
3172 &dt->format_expr->where);
3174 io_constraint (dt->format_label,
3175 "IO spec-list cannot contain both NAMELIST group name "
3176 "and format label at %L", spec_end);
3178 io_constraint (dt->rec,
3179 "NAMELIST IO is not allowed with a REC= specifier "
3180 "at %L.", &dt->rec->where);
3182 io_constraint (dt->advance,
3183 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3184 "at %L.", &dt->advance->where);
3189 io_constraint (dt->end,
3190 "An END tag is not allowed with a "
3191 "REC= specifier at %L.", &dt->end_where);
3193 io_constraint (dt->format_label == &format_asterisk,
3194 "FMT=* is not allowed with a REC= specifier "
3195 "at %L.", spec_end);
3200 int not_yes, not_no;
3203 io_constraint (dt->format_label == &format_asterisk,
3204 "List directed format(*) is not allowed with a "
3205 "ADVANCE= specifier at %L.", &expr->where);
3207 io_constraint (unformatted,
3208 "the ADVANCE= specifier at %L must appear with an "
3209 "explicit format expression", &expr->where);
3211 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3213 const gfc_char_t *advance = expr->value.character.string;
3214 not_no = gfc_wide_strlen (advance) != 2
3215 || gfc_wide_strncasecmp (advance, "no", 2) != 0;
3216 not_yes = gfc_wide_strlen (advance) != 3
3217 || gfc_wide_strncasecmp (advance, "yes", 3) != 0;
3225 io_constraint (not_no && not_yes,
3226 "ADVANCE= specifier at %L must have value = "
3227 "YES or NO.", &expr->where);
3229 io_constraint (dt->size && not_no && k == M_READ,
3230 "SIZE tag at %L requires an ADVANCE = 'NO'",
3233 io_constraint (dt->eor && not_no && k == M_READ,
3234 "EOR tag at %L requires an ADVANCE = 'NO'",
3238 expr = dt->format_expr;
3239 if (gfc_simplify_expr (expr, 0) == FAILURE
3240 || check_format_string (expr, k == M_READ) == FAILURE)
3245 #undef io_constraint
3248 /* Match a READ, WRITE or PRINT statement. */
3251 match_io (io_kind k)
3253 char name[GFC_MAX_SYMBOL_LEN + 1];
3262 where = gfc_current_locus;
3264 current_dt = dt = XCNEW (gfc_dt);
3265 m = gfc_match_char ('(');
3268 where = gfc_current_locus;
3271 else if (k == M_PRINT)
3273 /* Treat the non-standard case of PRINT namelist. */
3274 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3275 && gfc_match_name (name) == MATCH_YES)
3277 gfc_find_symbol (name, NULL, 1, &sym);
3278 if (sym && sym->attr.flavor == FL_NAMELIST)
3280 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3281 "%C is an extension") == FAILURE)
3287 dt->io_unit = default_unit (k);
3292 gfc_current_locus = where;
3296 if (gfc_current_form == FORM_FREE)
3298 char c = gfc_peek_ascii_char ();
3299 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3306 m = match_dt_format (dt);
3307 if (m == MATCH_ERROR)
3313 dt->io_unit = default_unit (k);
3318 /* Before issuing an error for a malformed 'print (1,*)' type of
3319 error, check for a default-char-expr of the form ('(I0)'). */
3320 if (k == M_PRINT && m == MATCH_YES)
3322 /* Reset current locus to get the initial '(' in an expression. */
3323 gfc_current_locus = where;
3324 dt->format_expr = NULL;
3325 m = match_dt_format (dt);
3327 if (m == MATCH_ERROR)
3329 if (m == MATCH_NO || dt->format_expr == NULL)
3333 dt->io_unit = default_unit (k);
3338 /* Match a control list */
3339 if (match_dt_element (k, dt) == MATCH_YES)
3341 if (match_dt_unit (k, dt) != MATCH_YES)
3344 if (gfc_match_char (')') == MATCH_YES)
3346 if (gfc_match_char (',') != MATCH_YES)
3349 m = match_dt_element (k, dt);
3352 if (m == MATCH_ERROR)
3355 m = match_dt_format (dt);
3358 if (m == MATCH_ERROR)
3361 where = gfc_current_locus;
3363 m = gfc_match_name (name);
3366 gfc_find_symbol (name, NULL, 1, &sym);
3367 if (sym && sym->attr.flavor == FL_NAMELIST)
3370 if (k == M_READ && check_namelist (sym))
3379 gfc_current_locus = where;
3381 goto loop; /* No matches, try regular elements */
3384 if (gfc_match_char (')') == MATCH_YES)
3386 if (gfc_match_char (',') != MATCH_YES)
3392 m = match_dt_element (k, dt);
3395 if (m == MATCH_ERROR)
3398 if (gfc_match_char (')') == MATCH_YES)
3400 if (gfc_match_char (',') != MATCH_YES)
3406 /* Used in check_io_constraints, where no locus is available. */
3407 spec_end = gfc_current_locus;
3409 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3410 to save the locus. This is used later when resolving transfer statements
3411 that might have a format expression without unit number. */
3412 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3414 dt->extra_comma = gfc_get_expr ();
3416 /* Set the types to something compatible with iokind. This is needed to
3417 get through gfc_free_expr later since iokind really has no Basic Type,
3419 dt->extra_comma->expr_type = EXPR_CONSTANT;
3420 dt->extra_comma->ts.type = BT_LOGICAL;
3422 /* Save the iokind and locus for later use in resolution. */
3423 dt->extra_comma->value.iokind = k;
3424 dt->extra_comma->where = gfc_current_locus;
3428 if (gfc_match_eos () != MATCH_YES)
3430 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3432 gfc_error ("Expected comma in I/O list at %C");
3437 m = match_io_list (k, &io_code);
3438 if (m == MATCH_ERROR)
3444 /* A full IO statement has been matched. Check the constraints. spec_end is
3445 supplied for cases where no locus is supplied. */
3446 m = check_io_constraints (k, dt, io_code, &spec_end);
3448 if (m == MATCH_ERROR)
3451 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3453 new_st.block = gfc_get_code ();
3454 new_st.block->op = new_st.op;
3455 new_st.block->next = io_code;
3457 terminate_io (io_code);
3462 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3472 gfc_match_read (void)
3474 return match_io (M_READ);
3479 gfc_match_write (void)
3481 return match_io (M_WRITE);
3486 gfc_match_print (void)
3490 m = match_io (M_PRINT);
3494 if (gfc_pure (NULL))
3496 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3504 /* Free a gfc_inquire structure. */
3507 gfc_free_inquire (gfc_inquire *inquire)
3510 if (inquire == NULL)
3513 gfc_free_expr (inquire->unit);
3514 gfc_free_expr (inquire->file);
3515 gfc_free_expr (inquire->iomsg);
3516 gfc_free_expr (inquire->iostat);
3517 gfc_free_expr (inquire->exist);
3518 gfc_free_expr (inquire->opened);
3519 gfc_free_expr (inquire->number);
3520 gfc_free_expr (inquire->named);
3521 gfc_free_expr (inquire->name);
3522 gfc_free_expr (inquire->access);
3523 gfc_free_expr (inquire->sequential);
3524 gfc_free_expr (inquire->direct);
3525 gfc_free_expr (inquire->form);
3526 gfc_free_expr (inquire->formatted);
3527 gfc_free_expr (inquire->unformatted);
3528 gfc_free_expr (inquire->recl);
3529 gfc_free_expr (inquire->nextrec);
3530 gfc_free_expr (inquire->blank);
3531 gfc_free_expr (inquire->position);
3532 gfc_free_expr (inquire->action);
3533 gfc_free_expr (inquire->read);
3534 gfc_free_expr (inquire->write);
3535 gfc_free_expr (inquire->readwrite);
3536 gfc_free_expr (inquire->delim);
3537 gfc_free_expr (inquire->encoding);
3538 gfc_free_expr (inquire->pad);
3539 gfc_free_expr (inquire->iolength);
3540 gfc_free_expr (inquire->convert);
3541 gfc_free_expr (inquire->strm_pos);
3542 gfc_free_expr (inquire->asynchronous);
3543 gfc_free_expr (inquire->decimal);
3544 gfc_free_expr (inquire->pending);
3545 gfc_free_expr (inquire->id);
3546 gfc_free_expr (inquire->sign);
3547 gfc_free_expr (inquire->size);
3548 gfc_free_expr (inquire->round);
3553 /* Match an element of an INQUIRE statement. */
3555 #define RETM if (m != MATCH_NO) return m;
3558 match_inquire_element (gfc_inquire *inquire)
3562 m = match_etag (&tag_unit, &inquire->unit);
3563 RETM m = match_etag (&tag_file, &inquire->file);
3564 RETM m = match_ltag (&tag_err, &inquire->err);
3565 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3566 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3567 RETM m = match_vtag (&tag_exist, &inquire->exist);
3568 RETM m = match_vtag (&tag_opened, &inquire->opened);
3569 RETM m = match_vtag (&tag_named, &inquire->named);
3570 RETM m = match_vtag (&tag_name, &inquire->name);
3571 RETM m = match_out_tag (&tag_number, &inquire->number);
3572 RETM m = match_vtag (&tag_s_access, &inquire->access);
3573 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3574 RETM m = match_vtag (&tag_direct, &inquire->direct);
3575 RETM m = match_vtag (&tag_s_form, &inquire->form);
3576 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3577 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3578 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3579 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3580 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3581 RETM m = match_vtag (&tag_s_position, &inquire->position);
3582 RETM m = match_vtag (&tag_s_action, &inquire->action);
3583 RETM m = match_vtag (&tag_read, &inquire->read);
3584 RETM m = match_vtag (&tag_write, &inquire->write);
3585 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3586 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3587 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3588 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3589 RETM m = match_vtag (&tag_size, &inquire->size);
3590 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3591 RETM m = match_vtag (&tag_s_round, &inquire->round);
3592 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3593 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3594 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3595 RETM m = match_vtag (&tag_convert, &inquire->convert);
3596 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3597 RETM m = match_vtag (&tag_pending, &inquire->pending);
3598 RETM m = match_vtag (&tag_id, &inquire->id);
3599 RETM return MATCH_NO;
3606 gfc_match_inquire (void)
3608 gfc_inquire *inquire;
3613 m = gfc_match_char ('(');
3617 inquire = XCNEW (gfc_inquire);
3619 loc = gfc_current_locus;
3621 m = match_inquire_element (inquire);
3622 if (m == MATCH_ERROR)
3626 m = gfc_match_expr (&inquire->unit);
3627 if (m == MATCH_ERROR)
3633 /* See if we have the IOLENGTH form of the inquire statement. */
3634 if (inquire->iolength != NULL)
3636 if (gfc_match_char (')') != MATCH_YES)
3639 m = match_io_list (M_INQUIRE, &code);
3640 if (m == MATCH_ERROR)
3645 new_st.op = EXEC_IOLENGTH;
3646 new_st.expr = inquire->iolength;
3647 new_st.ext.inquire = inquire;
3649 if (gfc_pure (NULL))
3651 gfc_free_statements (code);
3652 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3656 new_st.block = gfc_get_code ();
3657 new_st.block->op = EXEC_IOLENGTH;
3658 terminate_io (code);
3659 new_st.block->next = code;
3663 /* At this point, we have the non-IOLENGTH inquire statement. */
3666 if (gfc_match_char (')') == MATCH_YES)
3668 if (gfc_match_char (',') != MATCH_YES)
3671 m = match_inquire_element (inquire);
3672 if (m == MATCH_ERROR)
3677 if (inquire->iolength != NULL)
3679 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3684 if (gfc_match_eos () != MATCH_YES)
3687 if (inquire->unit != NULL && inquire->file != NULL)
3689 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3690 "UNIT specifiers", &loc);
3694 if (inquire->unit == NULL && inquire->file == NULL)
3696 gfc_error ("INQUIRE statement at %L requires either FILE or "
3697 "UNIT specifier", &loc);
3701 if (gfc_pure (NULL))
3703 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3707 if (inquire->id != NULL && inquire->pending == NULL)
3709 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
3710 "the ID= specifier", &loc);
3714 new_st.op = EXEC_INQUIRE;
3715 new_st.ext.inquire = inquire;
3719 gfc_syntax_error (ST_INQUIRE);
3722 gfc_free_inquire (inquire);
3727 /* Resolve everything in a gfc_inquire structure. */
3730 gfc_resolve_inquire (gfc_inquire *inquire)
3732 RESOLVE_TAG (&tag_unit, inquire->unit);
3733 RESOLVE_TAG (&tag_file, inquire->file);
3734 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3735 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3736 RESOLVE_TAG (&tag_exist, inquire->exist);
3737 RESOLVE_TAG (&tag_opened, inquire->opened);
3738 RESOLVE_TAG (&tag_number, inquire->number);
3739 RESOLVE_TAG (&tag_named, inquire->named);
3740 RESOLVE_TAG (&tag_name, inquire->name);
3741 RESOLVE_TAG (&tag_s_access, inquire->access);
3742 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3743 RESOLVE_TAG (&tag_direct, inquire->direct);
3744 RESOLVE_TAG (&tag_s_form, inquire->form);
3745 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3746 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3747 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3748 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3749 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3750 RESOLVE_TAG (&tag_s_position, inquire->position);
3751 RESOLVE_TAG (&tag_s_action, inquire->action);
3752 RESOLVE_TAG (&tag_read, inquire->read);
3753 RESOLVE_TAG (&tag_write, inquire->write);
3754 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3755 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3756 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3757 RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
3758 RESOLVE_TAG (&tag_s_round, inquire->round);
3759 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3760 RESOLVE_TAG (&tag_convert, inquire->convert);
3761 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3762 RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
3763 RESOLVE_TAG (&tag_s_sign, inquire->sign);
3764 RESOLVE_TAG (&tag_s_round, inquire->round);
3765 RESOLVE_TAG (&tag_pending, inquire->pending);
3766 RESOLVE_TAG (&tag_size, inquire->size);
3767 RESOLVE_TAG (&tag_id, inquire->id);
3769 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
3777 gfc_free_wait (gfc_wait *wait)
3782 gfc_free_expr (wait->unit);
3783 gfc_free_expr (wait->iostat);
3784 gfc_free_expr (wait->iomsg);
3785 gfc_free_expr (wait->id);
3790 gfc_resolve_wait (gfc_wait *wait)
3792 RESOLVE_TAG (&tag_unit, wait->unit);
3793 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
3794 RESOLVE_TAG (&tag_iostat, wait->iostat);
3795 RESOLVE_TAG (&tag_id, wait->id);
3797 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
3800 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
3806 /* Match an element of a WAIT statement. */
3808 #define RETM if (m != MATCH_NO) return m;
3811 match_wait_element (gfc_wait *wait)
3815 m = match_etag (&tag_unit, &wait->unit);
3816 RETM m = match_ltag (&tag_err, &wait->err);
3817 RETM m = match_ltag (&tag_end, &wait->eor);
3818 RETM m = match_ltag (&tag_eor, &wait->end);
3819 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
3820 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
3821 RETM m = match_etag (&tag_id, &wait->id);
3822 RETM return MATCH_NO;
3829 gfc_match_wait (void)
3835 m = gfc_match_char ('(');
3839 wait = XCNEW (gfc_wait);
3841 loc = gfc_current_locus;
3843 m = match_wait_element (wait);
3844 if (m == MATCH_ERROR)
3848 m = gfc_match_expr (&wait->unit);
3849 if (m == MATCH_ERROR)
3857 if (gfc_match_char (')') == MATCH_YES)
3859 if (gfc_match_char (',') != MATCH_YES)
3862 m = match_wait_element (wait);
3863 if (m == MATCH_ERROR)
3869 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
3870 "not allowed in Fortran 95") == FAILURE)
3873 if (gfc_pure (NULL))
3875 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
3879 new_st.op = EXEC_WAIT;
3880 new_st.ext.wait = wait;
3885 gfc_syntax_error (ST_WAIT);
3888 gfc_free_wait (wait);