1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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},
98 tag_newunit = {"NEWUNIT", " newunit =", " %v", BT_INTEGER};
100 static gfc_dt *current_dt;
102 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
105 /**************** Fortran 95 FORMAT parser *****************/
107 /* FORMAT tokens returned by format_lex(). */
110 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
111 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_LPAREN,
112 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
113 FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END,
114 FMT_ERROR, FMT_DC, FMT_DP, FMT_T, FMT_TR, FMT_TL, FMT_STAR, FMT_RC,
115 FMT_RD, FMT_RN, FMT_RP, FMT_RU, FMT_RZ
119 /* Local variables for checking format strings. The saved_token is
120 used to back up by a single format token during the parsing
122 static gfc_char_t *format_string;
123 static int format_string_pos;
124 static int format_length, use_last_char;
125 static char error_element;
126 static locus format_locus;
128 static format_token saved_token;
131 { MODE_STRING, MODE_FORMAT, MODE_COPY }
135 /* Return the next character in the format string. */
138 next_char (int in_string)
150 if (mode == MODE_STRING)
151 c = *format_string++;
154 c = gfc_next_char_literal (in_string);
159 if (gfc_option.flag_backslash && c == '\\')
161 locus old_locus = gfc_current_locus;
163 if (gfc_match_special_char (&c) == MATCH_NO)
164 gfc_current_locus = old_locus;
166 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
167 gfc_warning ("Extension: backslash character at %C");
170 if (mode == MODE_COPY)
171 *format_string++ = c;
173 if (mode != MODE_STRING)
174 format_locus = gfc_current_locus;
178 c = gfc_wide_toupper (c);
183 /* Back up one character position. Only works once. */
191 /* Eat up the spaces and return a character. */
194 next_char_not_space (bool *error)
199 error_element = c = next_char (0);
202 if (gfc_option.allow_std & GFC_STD_GNU)
203 gfc_warning ("Extension: Tab character in format at %C");
206 gfc_error ("Extension: Tab character in format at %C");
212 while (gfc_is_whitespace (c));
216 static int value = 0;
218 /* Simple lexical analyzer for getting the next token in a FORMAT
230 if (saved_token != FMT_NONE)
233 saved_token = FMT_NONE;
237 c = next_char_not_space (&error);
245 c = next_char_not_space (&error);
256 c = next_char_not_space (&error);
258 value = 10 * value + c - '0';
267 token = FMT_SIGNED_INT;
286 c = next_char_not_space (&error);
289 value = 10 * value + c - '0';
297 token = zflag ? FMT_ZERO : FMT_POSINT;
321 c = next_char_not_space (&error);
349 c = next_char_not_space (&error);
350 if (c != 'P' && c != 'S')
357 c = next_char_not_space (&error);
358 if (c == 'N' || c == 'Z')
419 c = next_char_not_space (&error);
449 c = next_char_not_space (&error);
452 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
453 "specifier not allowed at %C") == FAILURE)
459 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
460 "specifier not allowed at %C") == FAILURE)
472 c = next_char_not_space (&error);
521 token_to_string (format_token t)
540 /* Check a format statement. The format string, either from a FORMAT
541 statement or a constant in an I/O statement has already been parsed
542 by itself, and we are checking it for validity. The dual origin
543 means that the warning message is a little less than great. */
546 check_format (bool is_input)
548 const char *posint_required = _("Positive width required");
549 const char *nonneg_required = _("Nonnegative width required");
550 const char *unexpected_element = _("Unexpected element '%c' in format string"
552 const char *unexpected_end = _("Unexpected end of format string");
553 const char *zero_width = _("Zero width in format descriptor");
562 saved_token = FMT_NONE;
566 format_string_pos = 0;
573 error = _("Missing leading left parenthesis");
581 goto finished; /* Empty format is legal */
585 /* In this state, the next thing has to be a format item. */
602 error = _("Left parenthesis required after '*'");
627 /* Signed integer can only precede a P format. */
633 error = _("Expected P edit descriptor");
640 /* P requires a prior number. */
641 error = _("P descriptor requires leading scale factor");
645 /* X requires a prior number if we're being pedantic. */
646 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
647 "requires leading space count at %L", &format_locus)
665 goto extension_optional_comma;
676 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %L",
677 &format_locus) == FAILURE)
679 if (t != FMT_RPAREN || level > 0)
681 gfc_warning ("$ should be the last specifier in format at %L",
683 goto optional_comma_1;
704 error = unexpected_end;
708 error = unexpected_element;
713 /* In this state, t must currently be a data descriptor.
714 Deal with things that can/must follow the descriptor. */
725 /* Comma after P is allowed only for F, E, EN, ES, D, or G.
730 if (gfc_option.allow_std < GFC_STD_F2003 && t != FMT_COMMA
731 && t != FMT_F && t != FMT_E && t != FMT_EN && t != FMT_ES
732 && t != FMT_D && t != FMT_G && t != FMT_RPAREN && t != FMT_SLASH)
734 error = _("Comma required after P descriptor");
745 if (t != FMT_F && t != FMT_E && t != FMT_EN && t != FMT_ES && t != FMT_D
746 && t != FMT_G && t != FMT_RPAREN && t != FMT_SLASH)
748 error = _("Comma required after P descriptor");
762 error = _("Positive width required with T descriptor");
774 switch (gfc_notification_std (GFC_STD_GNU))
777 if (mode != MODE_FORMAT)
778 format_locus.nextc += format_string_pos;
779 gfc_warning ("Extension: Missing positive width after L "
780 "descriptor at %L", &format_locus);
785 error = posint_required;
816 if (t == FMT_G && u == FMT_ZERO)
823 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: 'G0' in "
824 "format at %L", &format_locus) == FAILURE)
835 error = posint_required;
841 error = _("E specifier not allowed with g0 descriptor");
850 format_locus.nextc += format_string_pos;
851 gfc_error_now ("Positive width required in format "
852 "specifier %s at %L", token_to_string (t),
863 /* Warn if -std=legacy, otherwise error. */
864 format_locus.nextc += format_string_pos;
865 if (gfc_option.warn_std != 0)
867 gfc_error_now ("Period required in format "
868 "specifier %s at %L", token_to_string (t),
874 gfc_warning ("Period required in format "
875 "specifier %s at %L", token_to_string (t),
877 /* If we go to finished, we need to unwind this
878 before the next round. */
879 format_locus.nextc -= format_string_pos;
887 if (u != FMT_ZERO && u != FMT_POSINT)
889 error = nonneg_required;
896 /* Look for optional exponent. */
911 error = _("Positive exponent width required");
922 if (t != FMT_ZERO && t != FMT_POSINT)
924 error = nonneg_required;
927 else if (is_input && t == FMT_ZERO)
929 error = posint_required;
938 /* Warn if -std=legacy, otherwise error. */
939 if (gfc_option.warn_std != 0)
941 error = _("Period required in format specifier");
944 if (mode != MODE_FORMAT)
945 format_locus.nextc += format_string_pos;
946 gfc_warning ("Period required in format specifier at %L",
955 if (t != FMT_ZERO && t != FMT_POSINT)
957 error = nonneg_required;
964 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
966 if (mode != MODE_FORMAT)
967 format_locus.nextc += format_string_pos;
968 gfc_warning ("The H format specifier at %L is"
969 " a Fortran 95 deleted feature", &format_locus);
972 if (mode == MODE_STRING)
974 format_string += value;
975 format_length -= value;
991 if (t != FMT_ZERO && t != FMT_POSINT)
993 error = nonneg_required;
996 else if (is_input && t == FMT_ZERO)
998 error = posint_required;
1005 if (t != FMT_PERIOD)
1014 if (t != FMT_ZERO && t != FMT_POSINT)
1016 error = nonneg_required;
1024 error = unexpected_element;
1029 /* Between a descriptor and what comes next. */
1047 goto optional_comma;
1050 error = unexpected_end;
1054 if (mode != MODE_FORMAT)
1055 format_locus.nextc += format_string_pos;
1056 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %L",
1057 &format_locus) == FAILURE)
1059 /* If we do not actually return a failure, we need to unwind this
1060 before the next round. */
1061 if (mode != MODE_FORMAT)
1062 format_locus.nextc -= format_string_pos;
1067 /* Optional comma is a weird between state where we've just finished
1068 reading a colon, slash, dollar or P descriptor. */
1085 /* Assume that we have another format item. */
1092 extension_optional_comma:
1093 /* As a GNU extension, permit a missing comma after a string literal. */
1110 goto optional_comma;
1113 error = unexpected_end;
1117 if (mode != MODE_FORMAT)
1118 format_locus.nextc += format_string_pos;
1119 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %L",
1120 &format_locus) == FAILURE)
1122 /* If we do not actually return a failure, we need to unwind this
1123 before the next round. */
1124 if (mode != MODE_FORMAT)
1125 format_locus.nextc -= format_string_pos;
1133 if (mode != MODE_FORMAT)
1134 format_locus.nextc += format_string_pos;
1135 if (error == unexpected_element)
1136 gfc_error (error, error_element, &format_locus);
1138 gfc_error ("%s in format string at %L", error, &format_locus);
1147 /* Given an expression node that is a constant string, see if it looks
1148 like a format string. */
1151 check_format_string (gfc_expr *e, bool is_input)
1153 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
1157 format_string = e->value.character.string;
1159 /* More elaborate measures are needed to show where a problem is within a
1160 format string that has been calculated, but that's probably not worth the
1162 format_locus = e->where;
1164 return check_format (is_input);
1168 /************ Fortran 95 I/O statement matchers *************/
1170 /* Match a FORMAT statement. This amounts to actually parsing the
1171 format descriptors in order to correctly locate the end of the
1175 gfc_match_format (void)
1180 if (gfc_current_ns->proc_name
1181 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
1183 gfc_error ("Format statement in module main block at %C");
1187 if (gfc_statement_label == NULL)
1189 gfc_error ("Missing format label at %C");
1192 gfc_gobble_whitespace ();
1197 start = gfc_current_locus;
1199 if (check_format (false) == FAILURE)
1202 if (gfc_match_eos () != MATCH_YES)
1204 gfc_syntax_error (ST_FORMAT);
1208 /* The label doesn't get created until after the statement is done
1209 being matched, so we have to leave the string for later. */
1211 gfc_current_locus = start; /* Back to the beginning */
1214 new_st.op = EXEC_NOP;
1217 e->expr_type = EXPR_CONSTANT;
1218 e->ts.type = BT_CHARACTER;
1219 e->ts.kind = gfc_default_character_kind;
1221 e->value.character.string = format_string
1222 = gfc_get_wide_string (format_length + 1);
1223 e->value.character.length = format_length;
1224 gfc_statement_label->format = e;
1227 check_format (false); /* Guaranteed to succeed */
1228 gfc_match_eos (); /* Guaranteed to succeed */
1234 /* Match an expression I/O tag of some sort. */
1237 match_etag (const io_tag *tag, gfc_expr **v)
1242 m = gfc_match (tag->spec);
1246 m = gfc_match (tag->value, &result);
1249 gfc_error ("Invalid value for %s specification at %C", tag->name);
1255 gfc_error ("Duplicate %s specification at %C", tag->name);
1256 gfc_free_expr (result);
1265 /* Match a variable I/O tag of some sort. */
1268 match_vtag (const io_tag *tag, gfc_expr **v)
1273 m = gfc_match (tag->spec);
1277 m = gfc_match (tag->value, &result);
1280 gfc_error ("Invalid value for %s specification at %C", tag->name);
1286 gfc_error ("Duplicate %s specification at %C", tag->name);
1287 gfc_free_expr (result);
1291 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1293 gfc_error ("Variable %s cannot be INTENT(IN) at %C", tag->name);
1294 gfc_free_expr (result);
1298 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1300 gfc_error ("Variable %s cannot be assigned in PURE procedure at %C",
1302 gfc_free_expr (result);
1311 /* Match I/O tags that cause variables to become redefined. */
1314 match_out_tag (const io_tag *tag, gfc_expr **result)
1318 m = match_vtag (tag, result);
1320 gfc_check_do_variable ((*result)->symtree);
1326 /* Match a label I/O tag. */
1329 match_ltag (const io_tag *tag, gfc_st_label ** label)
1335 m = gfc_match (tag->spec);
1339 m = gfc_match (tag->value, label);
1342 gfc_error ("Invalid value for %s specification at %C", tag->name);
1348 gfc_error ("Duplicate %s label specification at %C", tag->name);
1352 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1359 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1362 resolve_tag_format (const gfc_expr *e)
1364 if (e->expr_type == EXPR_CONSTANT
1365 && (e->ts.type != BT_CHARACTER
1366 || e->ts.kind != gfc_default_character_kind))
1368 gfc_error ("Constant expression in FORMAT tag at %L must be "
1369 "of type default CHARACTER", &e->where);
1373 /* If e's rank is zero and e is not an element of an array, it should be
1374 of integer or character type. The integer variable should be
1377 && (e->expr_type != EXPR_VARIABLE
1378 || e->symtree == NULL
1379 || e->symtree->n.sym->as == NULL
1380 || e->symtree->n.sym->as->rank == 0))
1382 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1384 gfc_error ("FORMAT tag at %L must be of type CHARACTER or INTEGER",
1388 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1390 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1391 "variable in FORMAT tag at %L", &e->where)
1394 if (e->symtree->n.sym->attr.assign != 1)
1396 gfc_error ("Variable '%s' at %L has not been assigned a "
1397 "format label", e->symtree->n.sym->name, &e->where);
1401 else if (e->ts.type == BT_INTEGER)
1403 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1404 "variable", gfc_basic_typename (e->ts.type), &e->where);
1411 /* If rank is nonzero and type is not character, we allow it under GFC_STD_LEGACY.
1412 It may be assigned an Hollerith constant. */
1413 if (e->ts.type != BT_CHARACTER)
1415 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1416 "in FORMAT tag at %L", &e->where) == FAILURE)
1419 if (e->rank == 0 && e->symtree->n.sym->as->type == AS_ASSUMED_SHAPE)
1421 gfc_error ("Non-character assumed shape array element in FORMAT"
1422 " tag at %L", &e->where);
1426 if (e->rank == 0 && e->symtree->n.sym->as->type == AS_ASSUMED_SIZE)
1428 gfc_error ("Non-character assumed size array element in FORMAT"
1429 " tag at %L", &e->where);
1433 if (e->rank == 0 && e->symtree->n.sym->attr.pointer)
1435 gfc_error ("Non-character pointer array element in FORMAT tag at %L",
1445 /* Do expression resolution and type-checking on an expression tag. */
1448 resolve_tag (const io_tag *tag, gfc_expr *e)
1453 if (gfc_resolve_expr (e) == FAILURE)
1456 if (tag == &tag_format)
1457 return resolve_tag_format (e);
1459 if (e->ts.type != tag->type)
1461 gfc_error ("%s tag at %L must be of type %s", tag->name,
1462 &e->where, gfc_basic_typename (tag->type));
1468 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1472 if (tag == &tag_iomsg)
1474 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1475 &e->where) == FAILURE)
1479 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1480 && e->ts.kind != gfc_default_integer_kind)
1482 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1483 "INTEGER in %s tag at %L", tag->name, &e->where)
1488 if (tag == &tag_convert)
1490 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1491 &e->where) == FAILURE)
1499 /* Match a single tag of an OPEN statement. */
1502 match_open_element (gfc_open *open)
1506 m = match_etag (&tag_e_async, &open->asynchronous);
1509 m = match_etag (&tag_unit, &open->unit);
1512 m = match_out_tag (&tag_iomsg, &open->iomsg);
1515 m = match_out_tag (&tag_iostat, &open->iostat);
1518 m = match_etag (&tag_file, &open->file);
1521 m = match_etag (&tag_status, &open->status);
1524 m = match_etag (&tag_e_access, &open->access);
1527 m = match_etag (&tag_e_form, &open->form);
1530 m = match_etag (&tag_e_recl, &open->recl);
1533 m = match_etag (&tag_e_blank, &open->blank);
1536 m = match_etag (&tag_e_position, &open->position);
1539 m = match_etag (&tag_e_action, &open->action);
1542 m = match_etag (&tag_e_delim, &open->delim);
1545 m = match_etag (&tag_e_pad, &open->pad);
1548 m = match_etag (&tag_e_decimal, &open->decimal);
1551 m = match_etag (&tag_e_encoding, &open->encoding);
1554 m = match_etag (&tag_e_round, &open->round);
1557 m = match_etag (&tag_e_sign, &open->sign);
1560 m = match_ltag (&tag_err, &open->err);
1563 m = match_etag (&tag_convert, &open->convert);
1566 m = match_out_tag (&tag_newunit, &open->newunit);
1574 /* Free the gfc_open structure and all the expressions it contains. */
1577 gfc_free_open (gfc_open *open)
1582 gfc_free_expr (open->unit);
1583 gfc_free_expr (open->iomsg);
1584 gfc_free_expr (open->iostat);
1585 gfc_free_expr (open->file);
1586 gfc_free_expr (open->status);
1587 gfc_free_expr (open->access);
1588 gfc_free_expr (open->form);
1589 gfc_free_expr (open->recl);
1590 gfc_free_expr (open->blank);
1591 gfc_free_expr (open->position);
1592 gfc_free_expr (open->action);
1593 gfc_free_expr (open->delim);
1594 gfc_free_expr (open->pad);
1595 gfc_free_expr (open->decimal);
1596 gfc_free_expr (open->encoding);
1597 gfc_free_expr (open->round);
1598 gfc_free_expr (open->sign);
1599 gfc_free_expr (open->convert);
1600 gfc_free_expr (open->asynchronous);
1601 gfc_free_expr (open->newunit);
1606 /* Resolve everything in a gfc_open structure. */
1609 gfc_resolve_open (gfc_open *open)
1612 RESOLVE_TAG (&tag_unit, open->unit);
1613 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1614 RESOLVE_TAG (&tag_iostat, open->iostat);
1615 RESOLVE_TAG (&tag_file, open->file);
1616 RESOLVE_TAG (&tag_status, open->status);
1617 RESOLVE_TAG (&tag_e_access, open->access);
1618 RESOLVE_TAG (&tag_e_form, open->form);
1619 RESOLVE_TAG (&tag_e_recl, open->recl);
1620 RESOLVE_TAG (&tag_e_blank, open->blank);
1621 RESOLVE_TAG (&tag_e_position, open->position);
1622 RESOLVE_TAG (&tag_e_action, open->action);
1623 RESOLVE_TAG (&tag_e_delim, open->delim);
1624 RESOLVE_TAG (&tag_e_pad, open->pad);
1625 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1626 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1627 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1628 RESOLVE_TAG (&tag_e_round, open->round);
1629 RESOLVE_TAG (&tag_e_sign, open->sign);
1630 RESOLVE_TAG (&tag_convert, open->convert);
1631 RESOLVE_TAG (&tag_newunit, open->newunit);
1633 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1640 /* Check if a given value for a SPECIFIER is either in the list of values
1641 allowed in F95 or F2003, issuing an error message and returning a zero
1642 value if it is not allowed. */
1645 compare_to_allowed_values (const char *specifier, const char *allowed[],
1646 const char *allowed_f2003[],
1647 const char *allowed_gnu[], gfc_char_t *value,
1648 const char *statement, bool warn)
1653 len = gfc_wide_strlen (value);
1656 for (len--; len > 0; len--)
1657 if (value[len] != ' ')
1662 for (i = 0; allowed[i]; i++)
1663 if (len == strlen (allowed[i])
1664 && gfc_wide_strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1667 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1668 if (len == strlen (allowed_f2003[i])
1669 && gfc_wide_strncasecmp (value, allowed_f2003[i],
1670 strlen (allowed_f2003[i])) == 0)
1672 notification n = gfc_notification_std (GFC_STD_F2003);
1674 if (n == WARNING || (warn && n == ERROR))
1676 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1677 "has value '%s'", specifier, statement,
1684 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1685 "%s statement at %C has value '%s'", specifier,
1686 statement, allowed_f2003[i]);
1694 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1695 if (len == strlen (allowed_gnu[i])
1696 && gfc_wide_strncasecmp (value, allowed_gnu[i],
1697 strlen (allowed_gnu[i])) == 0)
1699 notification n = gfc_notification_std (GFC_STD_GNU);
1701 if (n == WARNING || (warn && n == ERROR))
1703 gfc_warning ("Extension: %s specifier in %s statement at %C "
1704 "has value '%s'", specifier, statement,
1711 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1712 "%s statement at %C has value '%s'", specifier,
1713 statement, allowed_gnu[i]);
1723 char *s = gfc_widechar_to_char (value, -1);
1724 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1725 specifier, statement, s);
1731 char *s = gfc_widechar_to_char (value, -1);
1732 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1733 specifier, statement, s);
1740 /* Match an OPEN statement. */
1743 gfc_match_open (void)
1749 m = gfc_match_char ('(');
1753 open = XCNEW (gfc_open);
1755 m = match_open_element (open);
1757 if (m == MATCH_ERROR)
1761 m = gfc_match_expr (&open->unit);
1764 if (m == MATCH_ERROR)
1770 if (gfc_match_char (')') == MATCH_YES)
1772 if (gfc_match_char (',') != MATCH_YES)
1775 m = match_open_element (open);
1776 if (m == MATCH_ERROR)
1782 if (gfc_match_eos () == MATCH_NO)
1785 if (gfc_pure (NULL))
1787 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1791 warn = (open->err || open->iostat) ? true : false;
1793 /* Checks on NEWUNIT specifier. */
1798 gfc_error ("UNIT specifier not allowed with NEWUNIT at %C");
1802 if (!(open->file || (open->status
1803 && gfc_wide_strncasecmp (open->status->value.character.string,
1804 "scratch", 7) == 0)))
1806 gfc_error ("NEWUNIT specifier must have FILE= "
1807 "or STATUS='scratch' at %C");
1812 /* Checks on the ACCESS specifier. */
1813 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1815 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1816 static const char *access_f2003[] = { "STREAM", NULL };
1817 static const char *access_gnu[] = { "APPEND", NULL };
1819 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1821 open->access->value.character.string,
1826 /* Checks on the ACTION specifier. */
1827 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1829 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1831 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1832 open->action->value.character.string,
1837 /* Checks on the ASYNCHRONOUS specifier. */
1838 if (open->asynchronous)
1840 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1841 "not allowed in Fortran 95") == FAILURE)
1844 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1846 static const char * asynchronous[] = { "YES", "NO", NULL };
1848 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1849 NULL, NULL, open->asynchronous->value.character.string,
1855 /* Checks on the BLANK specifier. */
1858 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1859 "not allowed in Fortran 95") == FAILURE)
1862 if (open->blank->expr_type == EXPR_CONSTANT)
1864 static const char *blank[] = { "ZERO", "NULL", NULL };
1866 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1867 open->blank->value.character.string,
1873 /* Checks on the DECIMAL specifier. */
1876 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1877 "not allowed in Fortran 95") == FAILURE)
1880 if (open->decimal->expr_type == EXPR_CONSTANT)
1882 static const char * decimal[] = { "COMMA", "POINT", NULL };
1884 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1885 open->decimal->value.character.string,
1891 /* Checks on the DELIM specifier. */
1894 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1895 "not allowed in Fortran 95") == FAILURE)
1898 if (open->delim->expr_type == EXPR_CONSTANT)
1900 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1902 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1903 open->delim->value.character.string,
1909 /* Checks on the ENCODING specifier. */
1912 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1913 "not allowed in Fortran 95") == FAILURE)
1916 if (open->encoding->expr_type == EXPR_CONSTANT)
1918 static const char * encoding[] = { "DEFAULT", "UTF-8", NULL };
1920 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1921 open->encoding->value.character.string,
1927 /* Checks on the FORM specifier. */
1928 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1930 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1932 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1933 open->form->value.character.string,
1938 /* Checks on the PAD specifier. */
1939 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1941 static const char *pad[] = { "YES", "NO", NULL };
1943 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1944 open->pad->value.character.string,
1949 /* Checks on the POSITION specifier. */
1950 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1952 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1954 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1955 open->position->value.character.string,
1960 /* Checks on the ROUND specifier. */
1963 if (gfc_notify_std (GFC_STD_F2003, "Fortran F2003: ROUND= at %C "
1964 "not allowed in Fortran 95") == FAILURE)
1967 if (open->round->expr_type == EXPR_CONSTANT)
1969 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1970 "COMPATIBLE", "PROCESSOR_DEFINED",
1973 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1974 open->round->value.character.string,
1980 /* Checks on the SIGN specifier. */
1983 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
1984 "not allowed in Fortran 95") == FAILURE)
1987 if (open->sign->expr_type == EXPR_CONSTANT)
1989 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
1992 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
1993 open->sign->value.character.string,
1999 #define warn_or_error(...) \
2002 gfc_warning (__VA_ARGS__); \
2005 gfc_error (__VA_ARGS__); \
2010 /* Checks on the RECL specifier. */
2011 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
2012 && open->recl->ts.type == BT_INTEGER
2013 && mpz_sgn (open->recl->value.integer) != 1)
2015 warn_or_error ("RECL in OPEN statement at %C must be positive");
2018 /* Checks on the STATUS specifier. */
2019 if (open->status && open->status->expr_type == EXPR_CONSTANT)
2021 static const char *status[] = { "OLD", "NEW", "SCRATCH",
2022 "REPLACE", "UNKNOWN", NULL };
2024 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2025 open->status->value.character.string,
2029 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
2030 the FILE= specifier shall appear. */
2031 if (open->file == NULL
2032 && (gfc_wide_strncasecmp (open->status->value.character.string,
2034 || gfc_wide_strncasecmp (open->status->value.character.string,
2037 char *s = gfc_widechar_to_char (open->status->value.character.string,
2039 warn_or_error ("The STATUS specified in OPEN statement at %C is "
2040 "'%s' and no FILE specifier is present", s);
2044 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
2045 the FILE= specifier shall not appear. */
2046 if (gfc_wide_strncasecmp (open->status->value.character.string,
2047 "scratch", 7) == 0 && open->file)
2049 warn_or_error ("The STATUS specified in OPEN statement at %C "
2050 "cannot have the value SCRATCH if a FILE specifier "
2055 /* Things that are not allowed for unformatted I/O. */
2056 if (open->form && open->form->expr_type == EXPR_CONSTANT
2057 && (open->delim || open->decimal || open->encoding || open->round
2058 || open->sign || open->pad || open->blank)
2059 && gfc_wide_strncasecmp (open->form->value.character.string,
2060 "unformatted", 11) == 0)
2062 const char *spec = (open->delim ? "DELIM "
2063 : (open->pad ? "PAD " : open->blank
2066 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
2067 "unformatted I/O", spec);
2070 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
2071 && gfc_wide_strncasecmp (open->access->value.character.string,
2074 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
2079 && open->access && open->access->expr_type == EXPR_CONSTANT
2080 && !(gfc_wide_strncasecmp (open->access->value.character.string,
2081 "sequential", 10) == 0
2082 || gfc_wide_strncasecmp (open->access->value.character.string,
2084 || gfc_wide_strncasecmp (open->access->value.character.string,
2087 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
2088 "for stream or sequential ACCESS");
2091 #undef warn_or_error
2093 new_st.op = EXEC_OPEN;
2094 new_st.ext.open = open;
2098 gfc_syntax_error (ST_OPEN);
2101 gfc_free_open (open);
2106 /* Free a gfc_close structure an all its expressions. */
2109 gfc_free_close (gfc_close *close)
2114 gfc_free_expr (close->unit);
2115 gfc_free_expr (close->iomsg);
2116 gfc_free_expr (close->iostat);
2117 gfc_free_expr (close->status);
2122 /* Match elements of a CLOSE statement. */
2125 match_close_element (gfc_close *close)
2129 m = match_etag (&tag_unit, &close->unit);
2132 m = match_etag (&tag_status, &close->status);
2135 m = match_out_tag (&tag_iomsg, &close->iomsg);
2138 m = match_out_tag (&tag_iostat, &close->iostat);
2141 m = match_ltag (&tag_err, &close->err);
2149 /* Match a CLOSE statement. */
2152 gfc_match_close (void)
2158 m = gfc_match_char ('(');
2162 close = XCNEW (gfc_close);
2164 m = match_close_element (close);
2166 if (m == MATCH_ERROR)
2170 m = gfc_match_expr (&close->unit);
2173 if (m == MATCH_ERROR)
2179 if (gfc_match_char (')') == MATCH_YES)
2181 if (gfc_match_char (',') != MATCH_YES)
2184 m = match_close_element (close);
2185 if (m == MATCH_ERROR)
2191 if (gfc_match_eos () == MATCH_NO)
2194 if (gfc_pure (NULL))
2196 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
2200 warn = (close->iostat || close->err) ? true : false;
2202 /* Checks on the STATUS specifier. */
2203 if (close->status && close->status->expr_type == EXPR_CONSTANT)
2205 static const char *status[] = { "KEEP", "DELETE", NULL };
2207 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2208 close->status->value.character.string,
2213 new_st.op = EXEC_CLOSE;
2214 new_st.ext.close = close;
2218 gfc_syntax_error (ST_CLOSE);
2221 gfc_free_close (close);
2226 /* Resolve everything in a gfc_close structure. */
2229 gfc_resolve_close (gfc_close *close)
2231 RESOLVE_TAG (&tag_unit, close->unit);
2232 RESOLVE_TAG (&tag_iomsg, close->iomsg);
2233 RESOLVE_TAG (&tag_iostat, close->iostat);
2234 RESOLVE_TAG (&tag_status, close->status);
2236 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
2239 if (close->unit->expr_type == EXPR_CONSTANT
2240 && close->unit->ts.type == BT_INTEGER
2241 && mpz_sgn (close->unit->value.integer) < 0)
2243 gfc_error ("UNIT number in CLOSE statement at %L must be non-negative",
2244 &close->unit->where);
2251 /* Free a gfc_filepos structure. */
2254 gfc_free_filepos (gfc_filepos *fp)
2256 gfc_free_expr (fp->unit);
2257 gfc_free_expr (fp->iomsg);
2258 gfc_free_expr (fp->iostat);
2263 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
2266 match_file_element (gfc_filepos *fp)
2270 m = match_etag (&tag_unit, &fp->unit);
2273 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2276 m = match_out_tag (&tag_iostat, &fp->iostat);
2279 m = match_ltag (&tag_err, &fp->err);
2287 /* Match the second half of the file-positioning statements, REWIND,
2288 BACKSPACE, ENDFILE, or the FLUSH statement. */
2291 match_filepos (gfc_statement st, gfc_exec_op op)
2296 fp = XCNEW (gfc_filepos);
2298 if (gfc_match_char ('(') == MATCH_NO)
2300 m = gfc_match_expr (&fp->unit);
2301 if (m == MATCH_ERROR)
2309 m = match_file_element (fp);
2310 if (m == MATCH_ERROR)
2314 m = gfc_match_expr (&fp->unit);
2315 if (m == MATCH_ERROR)
2323 if (gfc_match_char (')') == MATCH_YES)
2325 if (gfc_match_char (',') != MATCH_YES)
2328 m = match_file_element (fp);
2329 if (m == MATCH_ERROR)
2336 if (gfc_match_eos () != MATCH_YES)
2339 if (gfc_pure (NULL))
2341 gfc_error ("%s statement not allowed in PURE procedure at %C",
2342 gfc_ascii_statement (st));
2348 new_st.ext.filepos = fp;
2352 gfc_syntax_error (st);
2355 gfc_free_filepos (fp);
2361 gfc_resolve_filepos (gfc_filepos *fp)
2363 RESOLVE_TAG (&tag_unit, fp->unit);
2364 RESOLVE_TAG (&tag_iostat, fp->iostat);
2365 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2366 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2369 if (fp->unit->expr_type == EXPR_CONSTANT
2370 && fp->unit->ts.type == BT_INTEGER
2371 && mpz_sgn (fp->unit->value.integer) < 0)
2373 gfc_error ("UNIT number in statement at %L must be non-negative",
2381 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2382 and the FLUSH statement. */
2385 gfc_match_endfile (void)
2387 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2391 gfc_match_backspace (void)
2393 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2397 gfc_match_rewind (void)
2399 return match_filepos (ST_REWIND, EXEC_REWIND);
2403 gfc_match_flush (void)
2405 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2409 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2412 /******************** Data Transfer Statements *********************/
2414 /* Return a default unit number. */
2417 default_unit (io_kind k)
2426 return gfc_int_expr (unit);
2430 /* Match a unit specification for a data transfer statement. */
2433 match_dt_unit (io_kind k, gfc_dt *dt)
2437 if (gfc_match_char ('*') == MATCH_YES)
2439 if (dt->io_unit != NULL)
2442 dt->io_unit = default_unit (k);
2446 if (gfc_match_expr (&e) == MATCH_YES)
2448 if (dt->io_unit != NULL)
2461 gfc_error ("Duplicate UNIT specification at %C");
2466 /* Match a format specification. */
2469 match_dt_format (gfc_dt *dt)
2473 gfc_st_label *label;
2476 where = gfc_current_locus;
2478 if (gfc_match_char ('*') == MATCH_YES)
2480 if (dt->format_expr != NULL || dt->format_label != NULL)
2483 dt->format_label = &format_asterisk;
2487 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2489 if (dt->format_expr != NULL || dt->format_label != NULL)
2491 gfc_free_st_label (label);
2495 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2498 dt->format_label = label;
2501 else if (m == MATCH_ERROR)
2502 /* The label was zero or too large. Emit the correct diagnosis. */
2505 if (gfc_match_expr (&e) == MATCH_YES)
2507 if (dt->format_expr != NULL || dt->format_label != NULL)
2512 dt->format_expr = e;
2516 gfc_current_locus = where; /* The only case where we have to restore */
2521 gfc_error ("Duplicate format specification at %C");
2526 /* Traverse a namelist that is part of a READ statement to make sure
2527 that none of the variables in the namelist are INTENT(IN). Returns
2528 nonzero if we find such a variable. */
2531 check_namelist (gfc_symbol *sym)
2535 for (p = sym->namelist; p; p = p->next)
2536 if (p->sym->attr.intent == INTENT_IN)
2538 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2539 p->sym->name, sym->name);
2547 /* Match a single data transfer element. */
2550 match_dt_element (io_kind k, gfc_dt *dt)
2552 char name[GFC_MAX_SYMBOL_LEN + 1];
2556 if (gfc_match (" unit =") == MATCH_YES)
2558 m = match_dt_unit (k, dt);
2563 if (gfc_match (" fmt =") == MATCH_YES)
2565 m = match_dt_format (dt);
2570 if (gfc_match (" nml = %n", name) == MATCH_YES)
2572 if (dt->namelist != NULL)
2574 gfc_error ("Duplicate NML specification at %C");
2578 if (gfc_find_symbol (name, NULL, 1, &sym))
2581 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2583 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2584 sym != NULL ? sym->name : name);
2589 if (k == M_READ && check_namelist (sym))
2595 m = match_etag (&tag_e_async, &dt->asynchronous);
2598 m = match_etag (&tag_e_blank, &dt->blank);
2601 m = match_etag (&tag_e_delim, &dt->delim);
2604 m = match_etag (&tag_e_pad, &dt->pad);
2607 m = match_etag (&tag_e_sign, &dt->sign);
2610 m = match_etag (&tag_e_round, &dt->round);
2613 m = match_out_tag (&tag_id, &dt->id);
2616 m = match_etag (&tag_e_decimal, &dt->decimal);
2619 m = match_etag (&tag_rec, &dt->rec);
2622 m = match_etag (&tag_spos, &dt->pos);
2625 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2628 m = match_out_tag (&tag_iostat, &dt->iostat);
2631 m = match_ltag (&tag_err, &dt->err);
2633 dt->err_where = gfc_current_locus;
2636 m = match_etag (&tag_advance, &dt->advance);
2639 m = match_out_tag (&tag_size, &dt->size);
2643 m = match_ltag (&tag_end, &dt->end);
2648 gfc_error ("END tag at %C not allowed in output statement");
2651 dt->end_where = gfc_current_locus;
2656 m = match_ltag (&tag_eor, &dt->eor);
2658 dt->eor_where = gfc_current_locus;
2666 /* Free a data transfer structure and everything below it. */
2669 gfc_free_dt (gfc_dt *dt)
2674 gfc_free_expr (dt->io_unit);
2675 gfc_free_expr (dt->format_expr);
2676 gfc_free_expr (dt->rec);
2677 gfc_free_expr (dt->advance);
2678 gfc_free_expr (dt->iomsg);
2679 gfc_free_expr (dt->iostat);
2680 gfc_free_expr (dt->size);
2681 gfc_free_expr (dt->pad);
2682 gfc_free_expr (dt->delim);
2683 gfc_free_expr (dt->sign);
2684 gfc_free_expr (dt->round);
2685 gfc_free_expr (dt->blank);
2686 gfc_free_expr (dt->decimal);
2687 gfc_free_expr (dt->extra_comma);
2688 gfc_free_expr (dt->pos);
2693 /* Resolve everything in a gfc_dt structure. */
2696 gfc_resolve_dt (gfc_dt *dt, locus *loc)
2700 RESOLVE_TAG (&tag_format, dt->format_expr);
2701 RESOLVE_TAG (&tag_rec, dt->rec);
2702 RESOLVE_TAG (&tag_spos, dt->pos);
2703 RESOLVE_TAG (&tag_advance, dt->advance);
2704 RESOLVE_TAG (&tag_id, dt->id);
2705 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2706 RESOLVE_TAG (&tag_iostat, dt->iostat);
2707 RESOLVE_TAG (&tag_size, dt->size);
2708 RESOLVE_TAG (&tag_e_pad, dt->pad);
2709 RESOLVE_TAG (&tag_e_delim, dt->delim);
2710 RESOLVE_TAG (&tag_e_sign, dt->sign);
2711 RESOLVE_TAG (&tag_e_round, dt->round);
2712 RESOLVE_TAG (&tag_e_blank, dt->blank);
2713 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2714 RESOLVE_TAG (&tag_e_async, dt->asynchronous);
2719 gfc_error ("UNIT not specified at %L", loc);
2723 if (gfc_resolve_expr (e) == SUCCESS
2724 && (e->ts.type != BT_INTEGER
2725 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2727 /* If there is no extra comma signifying the "format" form of the IO
2728 statement, then this must be an error. */
2729 if (!dt->extra_comma)
2731 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2732 "or a CHARACTER variable", &e->where);
2737 /* At this point, we have an extra comma. If io_unit has arrived as
2738 type character, we assume its really the "format" form of the I/O
2739 statement. We set the io_unit to the default unit and format to
2740 the character expression. See F95 Standard section 9.4. */
2742 k = dt->extra_comma->value.iokind;
2743 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2745 dt->format_expr = dt->io_unit;
2746 dt->io_unit = default_unit (k);
2748 /* Free this pointer now so that a warning/error is not triggered
2749 below for the "Extension". */
2750 gfc_free_expr (dt->extra_comma);
2751 dt->extra_comma = NULL;
2756 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2757 &dt->extra_comma->where);
2763 if (e->ts.type == BT_CHARACTER)
2765 if (gfc_has_vector_index (e))
2767 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2772 if (e->rank && e->ts.type != BT_CHARACTER)
2774 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2778 if (e->expr_type == EXPR_CONSTANT && e->ts.type == BT_INTEGER
2779 && mpz_sgn (e->value.integer) < 0)
2781 gfc_error ("UNIT number in statement at %L must be non-negative", &e->where);
2786 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2787 "item list at %L", &dt->extra_comma->where) == FAILURE)
2792 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2794 if (dt->err->defined == ST_LABEL_UNKNOWN)
2796 gfc_error ("ERR tag label %d at %L not defined",
2797 dt->err->value, &dt->err_where);
2804 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2806 if (dt->end->defined == ST_LABEL_UNKNOWN)
2808 gfc_error ("END tag label %d at %L not defined",
2809 dt->end->value, &dt->end_where);
2816 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2818 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2820 gfc_error ("EOR tag label %d at %L not defined",
2821 dt->eor->value, &dt->eor_where);
2826 /* Check the format label actually exists. */
2827 if (dt->format_label && dt->format_label != &format_asterisk
2828 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2830 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2831 &dt->format_label->where);
2838 /* Given an io_kind, return its name. */
2841 io_kind_name (io_kind k)
2860 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2867 /* Match an IO iteration statement of the form:
2869 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2871 which is equivalent to a single IO element. This function is
2872 mutually recursive with match_io_element(). */
2874 static match match_io_element (io_kind, gfc_code **);
2877 match_io_iterator (io_kind k, gfc_code **result)
2879 gfc_code *head, *tail, *new_code;
2887 old_loc = gfc_current_locus;
2889 if (gfc_match_char ('(') != MATCH_YES)
2892 m = match_io_element (k, &head);
2895 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2901 /* Can't be anything but an IO iterator. Build a list. */
2902 iter = gfc_get_iterator ();
2906 m = gfc_match_iterator (iter, 0);
2907 if (m == MATCH_ERROR)
2911 gfc_check_do_variable (iter->var->symtree);
2915 m = match_io_element (k, &new_code);
2916 if (m == MATCH_ERROR)
2925 tail = gfc_append_code (tail, new_code);
2927 if (gfc_match_char (',') != MATCH_YES)
2936 if (gfc_match_char (')') != MATCH_YES)
2939 new_code = gfc_get_code ();
2940 new_code->op = EXEC_DO;
2941 new_code->ext.iterator = iter;
2943 new_code->block = gfc_get_code ();
2944 new_code->block->op = EXEC_DO;
2945 new_code->block->next = head;
2951 gfc_error ("Syntax error in I/O iterator at %C");
2955 gfc_free_iterator (iter, 1);
2956 gfc_free_statements (head);
2957 gfc_current_locus = old_loc;
2962 /* Match a single element of an IO list, which is either a single
2963 expression or an IO Iterator. */
2966 match_io_element (io_kind k, gfc_code **cpp)
2974 m = match_io_iterator (k, cpp);
2980 m = gfc_match_variable (&expr, 0);
2982 gfc_error ("Expected variable in READ statement at %C");
2986 m = gfc_match_expr (&expr);
2988 gfc_error ("Expected expression in %s statement at %C",
2996 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2998 gfc_error ("Variable '%s' in input list at %C cannot be "
2999 "INTENT(IN)", expr->symtree->n.sym->name);
3004 && gfc_impure_variable (expr->symtree->n.sym)
3005 && current_dt->io_unit
3006 && current_dt->io_unit->ts.type == BT_CHARACTER)
3008 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
3009 expr->symtree->n.sym->name);
3013 if (gfc_check_do_variable (expr->symtree))
3019 if (current_dt->io_unit
3020 && current_dt->io_unit->ts.type == BT_CHARACTER
3022 && current_dt->io_unit->expr_type == EXPR_VARIABLE
3023 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
3025 gfc_error ("Cannot write to internal file unit '%s' at %C "
3026 "inside a PURE procedure",
3027 current_dt->io_unit->symtree->n.sym->name);
3039 gfc_free_expr (expr);
3043 cp = gfc_get_code ();
3044 cp->op = EXEC_TRANSFER;
3052 /* Match an I/O list, building gfc_code structures as we go. */
3055 match_io_list (io_kind k, gfc_code **head_p)
3057 gfc_code *head, *tail, *new_code;
3060 *head_p = head = tail = NULL;
3061 if (gfc_match_eos () == MATCH_YES)
3066 m = match_io_element (k, &new_code);
3067 if (m == MATCH_ERROR)
3072 tail = gfc_append_code (tail, new_code);
3076 if (gfc_match_eos () == MATCH_YES)
3078 if (gfc_match_char (',') != MATCH_YES)
3086 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3089 gfc_free_statements (head);
3094 /* Attach the data transfer end node. */
3097 terminate_io (gfc_code *io_code)
3101 if (io_code == NULL)
3102 io_code = new_st.block;
3104 c = gfc_get_code ();
3105 c->op = EXEC_DT_END;
3107 /* Point to structure that is already there */
3108 c->ext.dt = new_st.ext.dt;
3109 gfc_append_code (io_code, c);
3113 /* Check the constraints for a data transfer statement. The majority of the
3114 constraints appearing in 9.4 of the standard appear here. Some are handled
3115 in resolve_tag and others in gfc_resolve_dt. */
3118 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
3121 #define io_constraint(condition,msg,arg)\
3124 gfc_error(msg,arg);\
3130 gfc_symbol *sym = NULL;
3131 bool warn, unformatted;
3133 warn = (dt->err || dt->iostat) ? true : false;
3134 unformatted = dt->format_expr == NULL && dt->format_label == NULL
3135 && dt->namelist == NULL;
3140 if (expr && expr->expr_type == EXPR_VARIABLE
3141 && expr->ts.type == BT_CHARACTER)
3143 sym = expr->symtree->n.sym;
3145 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
3146 "Internal file at %L must not be INTENT(IN)",
3149 io_constraint (gfc_has_vector_index (dt->io_unit),
3150 "Internal file incompatible with vector subscript at %L",
3153 io_constraint (dt->rec != NULL,
3154 "REC tag at %L is incompatible with internal file",
3157 io_constraint (dt->pos != NULL,
3158 "POS tag at %L is incompatible with internal file",
3161 io_constraint (unformatted,
3162 "Unformatted I/O not allowed with internal unit at %L",
3163 &dt->io_unit->where);
3165 io_constraint (dt->asynchronous != NULL,
3166 "ASYNCHRONOUS tag at %L not allowed with internal file",
3167 &dt->asynchronous->where);
3169 if (dt->namelist != NULL)
3171 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
3172 "at %L with namelist", &expr->where)
3177 io_constraint (dt->advance != NULL,
3178 "ADVANCE tag at %L is incompatible with internal file",
3179 &dt->advance->where);
3182 if (expr && expr->ts.type != BT_CHARACTER)
3185 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
3186 "IO UNIT in %s statement at %C must be "
3187 "an internal file in a PURE procedure",
3193 io_constraint (dt->end, "END tag not allowed with output at %L",
3196 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
3199 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
3202 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
3205 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
3210 io_constraint (dt->size && dt->advance == NULL,
3211 "SIZE tag at %L requires an ADVANCE tag",
3214 io_constraint (dt->eor && dt->advance == NULL,
3215 "EOR tag at %L requires an ADVANCE tag",
3219 if (dt->asynchronous)
3221 static const char * asynchronous[] = { "YES", "NO", NULL };
3223 if (gfc_reduce_init_expr (dt->asynchronous) != SUCCESS)
3225 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
3226 "expression", &dt->asynchronous->where);
3230 if (!compare_to_allowed_values
3231 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
3232 dt->asynchronous->value.character.string,
3233 io_kind_name (k), warn))
3241 || gfc_wide_strlen (dt->asynchronous->value.character.string) != 3
3242 || gfc_wide_strncasecmp (dt->asynchronous->value.character.string,
3244 io_constraint (not_yes,
3245 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
3246 "specifier", &dt->id->where);
3251 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
3252 "not allowed in Fortran 95") == FAILURE)
3255 if (dt->decimal->expr_type == EXPR_CONSTANT)
3257 static const char * decimal[] = { "COMMA", "POINT", NULL };
3259 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
3260 dt->decimal->value.character.string,
3261 io_kind_name (k), warn))
3264 io_constraint (unformatted,
3265 "the DECIMAL= specifier at %L must be with an "
3266 "explicit format expression", &dt->decimal->where);
3272 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
3273 "not allowed in Fortran 95") == FAILURE)
3276 if (dt->blank->expr_type == EXPR_CONSTANT)
3278 static const char * blank[] = { "NULL", "ZERO", NULL };
3280 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
3281 dt->blank->value.character.string,
3282 io_kind_name (k), warn))
3285 io_constraint (unformatted,
3286 "the BLANK= specifier at %L must be with an "
3287 "explicit format expression", &dt->blank->where);
3293 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
3294 "not allowed in Fortran 95") == FAILURE)
3297 if (dt->pad->expr_type == EXPR_CONSTANT)
3299 static const char * pad[] = { "YES", "NO", NULL };
3301 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3302 dt->pad->value.character.string,
3303 io_kind_name (k), warn))
3306 io_constraint (unformatted,
3307 "the PAD= specifier at %L must be with an "
3308 "explicit format expression", &dt->pad->where);
3314 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3315 "not allowed in Fortran 95") == FAILURE)
3318 if (dt->round->expr_type == EXPR_CONSTANT)
3320 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3321 "COMPATIBLE", "PROCESSOR_DEFINED",
3324 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3325 dt->round->value.character.string,
3326 io_kind_name (k), warn))
3333 /* When implemented, change the following to use gfc_notify_std F2003.
3334 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3335 "not allowed in Fortran 95") == FAILURE)
3336 return MATCH_ERROR; */
3337 if (dt->sign->expr_type == EXPR_CONSTANT)
3339 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3342 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3343 dt->sign->value.character.string,
3344 io_kind_name (k), warn))
3347 io_constraint (unformatted,
3348 "SIGN= specifier at %L must be with an "
3349 "explicit format expression", &dt->sign->where);
3351 io_constraint (k == M_READ,
3352 "SIGN= specifier at %L not allowed in a "
3353 "READ statement", &dt->sign->where);
3359 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3360 "not allowed in Fortran 95") == FAILURE)
3363 if (dt->delim->expr_type == EXPR_CONSTANT)
3365 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3367 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3368 dt->delim->value.character.string,
3369 io_kind_name (k), warn))
3372 io_constraint (k == M_READ,
3373 "DELIM= specifier at %L not allowed in a "
3374 "READ statement", &dt->delim->where);
3376 io_constraint (dt->format_label != &format_asterisk
3377 && dt->namelist == NULL,
3378 "DELIM= specifier at %L must have FMT=*",
3381 io_constraint (unformatted && dt->namelist == NULL,
3382 "DELIM= specifier at %L must be with FMT=* or "
3383 "NML= specifier ", &dt->delim->where);
3389 io_constraint (io_code && dt->namelist,
3390 "NAMELIST cannot be followed by IO-list at %L",
3393 io_constraint (dt->format_expr,
3394 "IO spec-list cannot contain both NAMELIST group name "
3395 "and format specification at %L",
3396 &dt->format_expr->where);
3398 io_constraint (dt->format_label,
3399 "IO spec-list cannot contain both NAMELIST group name "
3400 "and format label at %L", spec_end);
3402 io_constraint (dt->rec,
3403 "NAMELIST IO is not allowed with a REC= specifier "
3404 "at %L", &dt->rec->where);
3406 io_constraint (dt->advance,
3407 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3408 "at %L", &dt->advance->where);
3413 io_constraint (dt->end,
3414 "An END tag is not allowed with a "
3415 "REC= specifier at %L", &dt->end_where);
3417 io_constraint (dt->format_label == &format_asterisk,
3418 "FMT=* is not allowed with a REC= specifier "
3421 io_constraint (dt->pos,
3422 "POS= is not allowed with REC= specifier "
3423 "at %L", &dt->pos->where);
3428 int not_yes, not_no;
3431 io_constraint (dt->format_label == &format_asterisk,
3432 "List directed format(*) is not allowed with a "
3433 "ADVANCE= specifier at %L.", &expr->where);
3435 io_constraint (unformatted,
3436 "the ADVANCE= specifier at %L must appear with an "
3437 "explicit format expression", &expr->where);
3439 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3441 const gfc_char_t *advance = expr->value.character.string;
3442 not_no = gfc_wide_strlen (advance) != 2
3443 || gfc_wide_strncasecmp (advance, "no", 2) != 0;
3444 not_yes = gfc_wide_strlen (advance) != 3
3445 || gfc_wide_strncasecmp (advance, "yes", 3) != 0;
3453 io_constraint (not_no && not_yes,
3454 "ADVANCE= specifier at %L must have value = "
3455 "YES or NO.", &expr->where);
3457 io_constraint (dt->size && not_no && k == M_READ,
3458 "SIZE tag at %L requires an ADVANCE = 'NO'",
3461 io_constraint (dt->eor && not_no && k == M_READ,
3462 "EOR tag at %L requires an ADVANCE = 'NO'",
3466 expr = dt->format_expr;
3467 if (gfc_simplify_expr (expr, 0) == FAILURE
3468 || check_format_string (expr, k == M_READ) == FAILURE)
3473 #undef io_constraint
3476 /* Match a READ, WRITE or PRINT statement. */
3479 match_io (io_kind k)
3481 char name[GFC_MAX_SYMBOL_LEN + 1];
3490 where = gfc_current_locus;
3492 current_dt = dt = XCNEW (gfc_dt);
3493 m = gfc_match_char ('(');
3496 where = gfc_current_locus;
3499 else if (k == M_PRINT)
3501 /* Treat the non-standard case of PRINT namelist. */
3502 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3503 && gfc_match_name (name) == MATCH_YES)
3505 gfc_find_symbol (name, NULL, 1, &sym);
3506 if (sym && sym->attr.flavor == FL_NAMELIST)
3508 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3509 "%C is an extension") == FAILURE)
3515 dt->io_unit = default_unit (k);
3520 gfc_current_locus = where;
3524 if (gfc_current_form == FORM_FREE)
3526 char c = gfc_peek_ascii_char ();
3527 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3534 m = match_dt_format (dt);
3535 if (m == MATCH_ERROR)
3541 dt->io_unit = default_unit (k);
3546 /* Before issuing an error for a malformed 'print (1,*)' type of
3547 error, check for a default-char-expr of the form ('(I0)'). */
3548 if (k == M_PRINT && m == MATCH_YES)
3550 /* Reset current locus to get the initial '(' in an expression. */
3551 gfc_current_locus = where;
3552 dt->format_expr = NULL;
3553 m = match_dt_format (dt);
3555 if (m == MATCH_ERROR)
3557 if (m == MATCH_NO || dt->format_expr == NULL)
3561 dt->io_unit = default_unit (k);
3566 /* Match a control list */
3567 if (match_dt_element (k, dt) == MATCH_YES)
3569 if (match_dt_unit (k, dt) != MATCH_YES)
3572 if (gfc_match_char (')') == MATCH_YES)
3574 if (gfc_match_char (',') != MATCH_YES)
3577 m = match_dt_element (k, dt);
3580 if (m == MATCH_ERROR)
3583 m = match_dt_format (dt);
3586 if (m == MATCH_ERROR)
3589 where = gfc_current_locus;
3591 m = gfc_match_name (name);
3594 gfc_find_symbol (name, NULL, 1, &sym);
3595 if (sym && sym->attr.flavor == FL_NAMELIST)
3598 if (k == M_READ && check_namelist (sym))
3607 gfc_current_locus = where;
3609 goto loop; /* No matches, try regular elements */
3612 if (gfc_match_char (')') == MATCH_YES)
3614 if (gfc_match_char (',') != MATCH_YES)
3620 m = match_dt_element (k, dt);
3623 if (m == MATCH_ERROR)
3626 if (gfc_match_char (')') == MATCH_YES)
3628 if (gfc_match_char (',') != MATCH_YES)
3634 /* Used in check_io_constraints, where no locus is available. */
3635 spec_end = gfc_current_locus;
3637 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3638 to save the locus. This is used later when resolving transfer statements
3639 that might have a format expression without unit number. */
3640 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3642 dt->extra_comma = gfc_get_expr ();
3644 /* Set the types to something compatible with iokind. This is needed to
3645 get through gfc_free_expr later since iokind really has no Basic Type,
3647 dt->extra_comma->expr_type = EXPR_CONSTANT;
3648 dt->extra_comma->ts.type = BT_LOGICAL;
3650 /* Save the iokind and locus for later use in resolution. */
3651 dt->extra_comma->value.iokind = k;
3652 dt->extra_comma->where = gfc_current_locus;
3656 if (gfc_match_eos () != MATCH_YES)
3658 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3660 gfc_error ("Expected comma in I/O list at %C");
3665 m = match_io_list (k, &io_code);
3666 if (m == MATCH_ERROR)
3672 /* A full IO statement has been matched. Check the constraints. spec_end is
3673 supplied for cases where no locus is supplied. */
3674 m = check_io_constraints (k, dt, io_code, &spec_end);
3676 if (m == MATCH_ERROR)
3679 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3681 new_st.block = gfc_get_code ();
3682 new_st.block->op = new_st.op;
3683 new_st.block->next = io_code;
3685 terminate_io (io_code);
3690 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3700 gfc_match_read (void)
3702 return match_io (M_READ);
3707 gfc_match_write (void)
3709 return match_io (M_WRITE);
3714 gfc_match_print (void)
3718 m = match_io (M_PRINT);
3722 if (gfc_pure (NULL))
3724 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3732 /* Free a gfc_inquire structure. */
3735 gfc_free_inquire (gfc_inquire *inquire)
3738 if (inquire == NULL)
3741 gfc_free_expr (inquire->unit);
3742 gfc_free_expr (inquire->file);
3743 gfc_free_expr (inquire->iomsg);
3744 gfc_free_expr (inquire->iostat);
3745 gfc_free_expr (inquire->exist);
3746 gfc_free_expr (inquire->opened);
3747 gfc_free_expr (inquire->number);
3748 gfc_free_expr (inquire->named);
3749 gfc_free_expr (inquire->name);
3750 gfc_free_expr (inquire->access);
3751 gfc_free_expr (inquire->sequential);
3752 gfc_free_expr (inquire->direct);
3753 gfc_free_expr (inquire->form);
3754 gfc_free_expr (inquire->formatted);
3755 gfc_free_expr (inquire->unformatted);
3756 gfc_free_expr (inquire->recl);
3757 gfc_free_expr (inquire->nextrec);
3758 gfc_free_expr (inquire->blank);
3759 gfc_free_expr (inquire->position);
3760 gfc_free_expr (inquire->action);
3761 gfc_free_expr (inquire->read);
3762 gfc_free_expr (inquire->write);
3763 gfc_free_expr (inquire->readwrite);
3764 gfc_free_expr (inquire->delim);
3765 gfc_free_expr (inquire->encoding);
3766 gfc_free_expr (inquire->pad);
3767 gfc_free_expr (inquire->iolength);
3768 gfc_free_expr (inquire->convert);
3769 gfc_free_expr (inquire->strm_pos);
3770 gfc_free_expr (inquire->asynchronous);
3771 gfc_free_expr (inquire->decimal);
3772 gfc_free_expr (inquire->pending);
3773 gfc_free_expr (inquire->id);
3774 gfc_free_expr (inquire->sign);
3775 gfc_free_expr (inquire->size);
3776 gfc_free_expr (inquire->round);
3781 /* Match an element of an INQUIRE statement. */
3783 #define RETM if (m != MATCH_NO) return m;
3786 match_inquire_element (gfc_inquire *inquire)
3790 m = match_etag (&tag_unit, &inquire->unit);
3791 RETM m = match_etag (&tag_file, &inquire->file);
3792 RETM m = match_ltag (&tag_err, &inquire->err);
3793 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3794 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3795 RETM m = match_vtag (&tag_exist, &inquire->exist);
3796 RETM m = match_vtag (&tag_opened, &inquire->opened);
3797 RETM m = match_vtag (&tag_named, &inquire->named);
3798 RETM m = match_vtag (&tag_name, &inquire->name);
3799 RETM m = match_out_tag (&tag_number, &inquire->number);
3800 RETM m = match_vtag (&tag_s_access, &inquire->access);
3801 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3802 RETM m = match_vtag (&tag_direct, &inquire->direct);
3803 RETM m = match_vtag (&tag_s_form, &inquire->form);
3804 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3805 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3806 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3807 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3808 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3809 RETM m = match_vtag (&tag_s_position, &inquire->position);
3810 RETM m = match_vtag (&tag_s_action, &inquire->action);
3811 RETM m = match_vtag (&tag_read, &inquire->read);
3812 RETM m = match_vtag (&tag_write, &inquire->write);
3813 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3814 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3815 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3816 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3817 RETM m = match_vtag (&tag_size, &inquire->size);
3818 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3819 RETM m = match_vtag (&tag_s_round, &inquire->round);
3820 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3821 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3822 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3823 RETM m = match_vtag (&tag_convert, &inquire->convert);
3824 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3825 RETM m = match_vtag (&tag_pending, &inquire->pending);
3826 RETM m = match_vtag (&tag_id, &inquire->id);
3827 RETM return MATCH_NO;
3834 gfc_match_inquire (void)
3836 gfc_inquire *inquire;
3841 m = gfc_match_char ('(');
3845 inquire = XCNEW (gfc_inquire);
3847 loc = gfc_current_locus;
3849 m = match_inquire_element (inquire);
3850 if (m == MATCH_ERROR)
3854 m = gfc_match_expr (&inquire->unit);
3855 if (m == MATCH_ERROR)
3861 /* See if we have the IOLENGTH form of the inquire statement. */
3862 if (inquire->iolength != NULL)
3864 if (gfc_match_char (')') != MATCH_YES)
3867 m = match_io_list (M_INQUIRE, &code);
3868 if (m == MATCH_ERROR)
3873 new_st.op = EXEC_IOLENGTH;
3874 new_st.expr1 = inquire->iolength;
3875 new_st.ext.inquire = inquire;
3877 if (gfc_pure (NULL))
3879 gfc_free_statements (code);
3880 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3884 new_st.block = gfc_get_code ();
3885 new_st.block->op = EXEC_IOLENGTH;
3886 terminate_io (code);
3887 new_st.block->next = code;
3891 /* At this point, we have the non-IOLENGTH inquire statement. */
3894 if (gfc_match_char (')') == MATCH_YES)
3896 if (gfc_match_char (',') != MATCH_YES)
3899 m = match_inquire_element (inquire);
3900 if (m == MATCH_ERROR)
3905 if (inquire->iolength != NULL)
3907 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3912 if (gfc_match_eos () != MATCH_YES)
3915 if (inquire->unit != NULL && inquire->file != NULL)
3917 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3918 "UNIT specifiers", &loc);
3922 if (inquire->unit == NULL && inquire->file == NULL)
3924 gfc_error ("INQUIRE statement at %L requires either FILE or "
3925 "UNIT specifier", &loc);
3929 if (gfc_pure (NULL))
3931 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3935 if (inquire->id != NULL && inquire->pending == NULL)
3937 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
3938 "the ID= specifier", &loc);
3942 new_st.op = EXEC_INQUIRE;
3943 new_st.ext.inquire = inquire;
3947 gfc_syntax_error (ST_INQUIRE);
3950 gfc_free_inquire (inquire);
3955 /* Resolve everything in a gfc_inquire structure. */
3958 gfc_resolve_inquire (gfc_inquire *inquire)
3960 RESOLVE_TAG (&tag_unit, inquire->unit);
3961 RESOLVE_TAG (&tag_file, inquire->file);
3962 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3963 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3964 RESOLVE_TAG (&tag_exist, inquire->exist);
3965 RESOLVE_TAG (&tag_opened, inquire->opened);
3966 RESOLVE_TAG (&tag_number, inquire->number);
3967 RESOLVE_TAG (&tag_named, inquire->named);
3968 RESOLVE_TAG (&tag_name, inquire->name);
3969 RESOLVE_TAG (&tag_s_access, inquire->access);
3970 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3971 RESOLVE_TAG (&tag_direct, inquire->direct);
3972 RESOLVE_TAG (&tag_s_form, inquire->form);
3973 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3974 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3975 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3976 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3977 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3978 RESOLVE_TAG (&tag_s_position, inquire->position);
3979 RESOLVE_TAG (&tag_s_action, inquire->action);
3980 RESOLVE_TAG (&tag_read, inquire->read);
3981 RESOLVE_TAG (&tag_write, inquire->write);
3982 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3983 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3984 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3985 RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
3986 RESOLVE_TAG (&tag_s_round, inquire->round);
3987 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3988 RESOLVE_TAG (&tag_convert, inquire->convert);
3989 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3990 RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
3991 RESOLVE_TAG (&tag_s_sign, inquire->sign);
3992 RESOLVE_TAG (&tag_s_round, inquire->round);
3993 RESOLVE_TAG (&tag_pending, inquire->pending);
3994 RESOLVE_TAG (&tag_size, inquire->size);
3995 RESOLVE_TAG (&tag_id, inquire->id);
3997 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
4005 gfc_free_wait (gfc_wait *wait)
4010 gfc_free_expr (wait->unit);
4011 gfc_free_expr (wait->iostat);
4012 gfc_free_expr (wait->iomsg);
4013 gfc_free_expr (wait->id);
4018 gfc_resolve_wait (gfc_wait *wait)
4020 RESOLVE_TAG (&tag_unit, wait->unit);
4021 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
4022 RESOLVE_TAG (&tag_iostat, wait->iostat);
4023 RESOLVE_TAG (&tag_id, wait->id);
4025 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
4028 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
4034 /* Match an element of a WAIT statement. */
4036 #define RETM if (m != MATCH_NO) return m;
4039 match_wait_element (gfc_wait *wait)
4043 m = match_etag (&tag_unit, &wait->unit);
4044 RETM m = match_ltag (&tag_err, &wait->err);
4045 RETM m = match_ltag (&tag_end, &wait->eor);
4046 RETM m = match_ltag (&tag_eor, &wait->end);
4047 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
4048 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
4049 RETM m = match_etag (&tag_id, &wait->id);
4050 RETM return MATCH_NO;
4057 gfc_match_wait (void)
4063 m = gfc_match_char ('(');
4067 wait = XCNEW (gfc_wait);
4069 loc = gfc_current_locus;
4071 m = match_wait_element (wait);
4072 if (m == MATCH_ERROR)
4076 m = gfc_match_expr (&wait->unit);
4077 if (m == MATCH_ERROR)
4085 if (gfc_match_char (')') == MATCH_YES)
4087 if (gfc_match_char (',') != MATCH_YES)
4090 m = match_wait_element (wait);
4091 if (m == MATCH_ERROR)
4097 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
4098 "not allowed in Fortran 95") == FAILURE)
4101 if (gfc_pure (NULL))
4103 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
4107 new_st.op = EXEC_WAIT;
4108 new_st.ext.wait = wait;
4113 gfc_syntax_error (ST_WAIT);
4116 gfc_free_wait (wait);