1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4 Free Software Foundation, Inc.
5 Contributed by Andy Vaught
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
31 format_asterisk = {0, NULL, NULL, -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL,
36 const char *name, *spec, *value;
42 tag_file = {"FILE", " file =", " %e", BT_CHARACTER },
43 tag_status = {"STATUS", " status =", " %e", BT_CHARACTER},
44 tag_e_access = {"ACCESS", " access =", " %e", BT_CHARACTER},
45 tag_e_form = {"FORM", " form =", " %e", BT_CHARACTER},
46 tag_e_recl = {"RECL", " recl =", " %e", BT_INTEGER},
47 tag_e_blank = {"BLANK", " blank =", " %e", BT_CHARACTER},
48 tag_e_position = {"POSITION", " position =", " %e", BT_CHARACTER},
49 tag_e_action = {"ACTION", " action =", " %e", BT_CHARACTER},
50 tag_e_delim = {"DELIM", " delim =", " %e", BT_CHARACTER},
51 tag_e_pad = {"PAD", " pad =", " %e", BT_CHARACTER},
52 tag_e_decimal = {"DECIMAL", " decimal =", " %e", BT_CHARACTER},
53 tag_e_encoding = {"ENCODING", " encoding =", " %e", BT_CHARACTER},
54 tag_e_async = {"ASYNCHRONOUS", " asynchronous =", " %e", BT_CHARACTER},
55 tag_e_round = {"ROUND", " round =", " %e", BT_CHARACTER},
56 tag_e_sign = {"SIGN", " sign =", " %e", BT_CHARACTER},
57 tag_unit = {"UNIT", " unit =", " %e", BT_INTEGER},
58 tag_advance = {"ADVANCE", " advance =", " %e", BT_CHARACTER},
59 tag_rec = {"REC", " rec =", " %e", BT_INTEGER},
60 tag_spos = {"POSITION", " pos =", " %e", BT_INTEGER},
61 tag_format = {"FORMAT", NULL, NULL, BT_CHARACTER},
62 tag_iomsg = {"IOMSG", " iomsg =", " %e", BT_CHARACTER},
63 tag_iostat = {"IOSTAT", " iostat =", " %v", BT_INTEGER},
64 tag_size = {"SIZE", " size =", " %v", BT_INTEGER},
65 tag_exist = {"EXIST", " exist =", " %v", BT_LOGICAL},
66 tag_opened = {"OPENED", " opened =", " %v", BT_LOGICAL},
67 tag_named = {"NAMED", " named =", " %v", BT_LOGICAL},
68 tag_name = {"NAME", " name =", " %v", BT_CHARACTER},
69 tag_number = {"NUMBER", " number =", " %v", BT_INTEGER},
70 tag_s_access = {"ACCESS", " access =", " %v", BT_CHARACTER},
71 tag_sequential = {"SEQUENTIAL", " sequential =", " %v", BT_CHARACTER},
72 tag_direct = {"DIRECT", " direct =", " %v", BT_CHARACTER},
73 tag_s_form = {"FORM", " form =", " %v", BT_CHARACTER},
74 tag_formatted = {"FORMATTED", " formatted =", " %v", BT_CHARACTER},
75 tag_unformatted = {"UNFORMATTED", " unformatted =", " %v", BT_CHARACTER},
76 tag_s_recl = {"RECL", " recl =", " %v", BT_INTEGER},
77 tag_nextrec = {"NEXTREC", " nextrec =", " %v", BT_INTEGER},
78 tag_s_blank = {"BLANK", " blank =", " %v", BT_CHARACTER},
79 tag_s_position = {"POSITION", " position =", " %v", BT_CHARACTER},
80 tag_s_action = {"ACTION", " action =", " %v", BT_CHARACTER},
81 tag_read = {"READ", " read =", " %v", BT_CHARACTER},
82 tag_write = {"WRITE", " write =", " %v", BT_CHARACTER},
83 tag_readwrite = {"READWRITE", " readwrite =", " %v", BT_CHARACTER},
84 tag_s_delim = {"DELIM", " delim =", " %v", BT_CHARACTER},
85 tag_s_pad = {"PAD", " pad =", " %v", BT_CHARACTER},
86 tag_s_decimal = {"DECIMAL", " decimal =", " %v", BT_CHARACTER},
87 tag_s_encoding = {"ENCODING", " encoding =", " %v", BT_CHARACTER},
88 tag_s_async = {"ASYNCHRONOUS", " asynchronous =", " %v", BT_CHARACTER},
89 tag_s_round = {"ROUND", " round =", " %v", BT_CHARACTER},
90 tag_s_sign = {"SIGN", " sign =", " %v", BT_CHARACTER},
91 tag_iolength = {"IOLENGTH", " iolength =", " %v", BT_INTEGER},
92 tag_convert = {"CONVERT", " convert =", " %e", BT_CHARACTER},
93 tag_strm_out = {"POS", " pos =", " %v", BT_INTEGER},
94 tag_err = {"ERR", " err =", " %l", BT_UNKNOWN},
95 tag_end = {"END", " end =", " %l", BT_UNKNOWN},
96 tag_eor = {"EOR", " eor =", " %l", BT_UNKNOWN},
97 tag_id = {"ID", " id =", " %v", BT_INTEGER},
98 tag_pending = {"PENDING", " pending =", " %v", BT_LOGICAL},
99 tag_newunit = {"NEWUNIT", " newunit =", " %v", BT_INTEGER};
101 static gfc_dt *current_dt;
103 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
106 /**************** Fortran 95 FORMAT parser *****************/
108 /* FORMAT tokens returned by format_lex(). */
111 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
112 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_LPAREN,
113 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
114 FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END,
115 FMT_ERROR, FMT_DC, FMT_DP, FMT_T, FMT_TR, FMT_TL, FMT_STAR, FMT_RC,
116 FMT_RD, FMT_RN, FMT_RP, FMT_RU, FMT_RZ
120 /* Local variables for checking format strings. The saved_token is
121 used to back up by a single format token during the parsing
123 static gfc_char_t *format_string;
124 static int format_string_pos;
125 static int format_length, use_last_char;
126 static char error_element;
127 static locus format_locus;
129 static format_token saved_token;
132 { MODE_STRING, MODE_FORMAT, MODE_COPY }
136 /* Return the next character in the format string. */
139 next_char (gfc_instring in_string)
151 if (mode == MODE_STRING)
152 c = *format_string++;
155 c = gfc_next_char_literal (in_string);
160 if (gfc_option.flag_backslash && c == '\\')
162 locus old_locus = gfc_current_locus;
164 if (gfc_match_special_char (&c) == MATCH_NO)
165 gfc_current_locus = old_locus;
167 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
168 gfc_warning ("Extension: backslash character at %C");
171 if (mode == MODE_COPY)
172 *format_string++ = c;
174 if (mode != MODE_STRING)
175 format_locus = gfc_current_locus;
179 c = gfc_wide_toupper (c);
184 /* Back up one character position. Only works once. */
192 /* Eat up the spaces and return a character. */
195 next_char_not_space (bool *error)
200 error_element = c = next_char (NONSTRING);
203 if (gfc_option.allow_std & GFC_STD_GNU)
204 gfc_warning ("Extension: Tab character in format at %C");
207 gfc_error ("Extension: Tab character in format at %C");
213 while (gfc_is_whitespace (c));
217 static int value = 0;
219 /* Simple lexical analyzer for getting the next token in a FORMAT
231 if (saved_token != FMT_NONE)
234 saved_token = FMT_NONE;
238 c = next_char_not_space (&error);
246 c = next_char_not_space (&error);
257 c = next_char_not_space (&error);
259 value = 10 * value + c - '0';
268 token = FMT_SIGNED_INT;
287 c = next_char_not_space (&error);
290 value = 10 * value + c - '0';
298 token = zflag ? FMT_ZERO : FMT_POSINT;
322 c = next_char_not_space (&error);
350 c = next_char_not_space (&error);
351 if (c != 'P' && c != 'S')
358 c = next_char_not_space (&error);
359 if (c == 'N' || c == 'Z')
377 c = next_char (INSTRING_WARN);
386 c = next_char (INSTRING_NOWARN);
420 c = next_char_not_space (&error);
450 c = next_char_not_space (&error);
453 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
454 "specifier not allowed at %C") == FAILURE)
460 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
461 "specifier not allowed at %C") == FAILURE)
473 c = next_char_not_space (&error);
522 token_to_string (format_token t)
541 /* Check a format statement. The format string, either from a FORMAT
542 statement or a constant in an I/O statement has already been parsed
543 by itself, and we are checking it for validity. The dual origin
544 means that the warning message is a little less than great. */
547 check_format (bool is_input)
549 const char *posint_required = _("Positive width required");
550 const char *nonneg_required = _("Nonnegative width required");
551 const char *unexpected_element = _("Unexpected element '%c' in format string"
553 const char *unexpected_end = _("Unexpected end of format string");
554 const char *zero_width = _("Zero width in format descriptor");
563 saved_token = FMT_NONE;
567 format_string_pos = 0;
574 error = _("Missing leading left parenthesis");
582 goto finished; /* Empty format is legal */
586 /* In this state, the next thing has to be a format item. */
603 error = _("Left parenthesis required after '*'");
628 /* Signed integer can only precede a P format. */
634 error = _("Expected P edit descriptor");
641 /* P requires a prior number. */
642 error = _("P descriptor requires leading scale factor");
646 /* X requires a prior number if we're being pedantic. */
647 if (mode != MODE_FORMAT)
648 format_locus.nextc += format_string_pos;
649 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
650 "requires leading space count at %L", &format_locus)
668 goto extension_optional_comma;
679 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %L",
680 &format_locus) == FAILURE)
682 if (t != FMT_RPAREN || level > 0)
684 gfc_warning ("$ should be the last specifier in format at %L",
686 goto optional_comma_1;
707 error = unexpected_end;
711 error = unexpected_element;
716 /* In this state, t must currently be a data descriptor.
717 Deal with things that can/must follow the descriptor. */
728 /* No comma after P allowed only for F, E, EN, ES, D, or G.
733 if (!(gfc_option.allow_std & GFC_STD_F2003) && t != FMT_COMMA
734 && t != FMT_F && t != FMT_E && t != FMT_EN && t != FMT_ES
735 && t != FMT_D && t != FMT_G && t != FMT_RPAREN && t != FMT_SLASH)
737 error = _("Comma required after P descriptor");
748 if (t != FMT_F && t != FMT_E && t != FMT_EN && t != FMT_ES && t != FMT_D
749 && t != FMT_G && t != FMT_RPAREN && t != FMT_SLASH)
751 error = _("Comma required after P descriptor");
765 error = _("Positive width required with T descriptor");
777 switch (gfc_notification_std (GFC_STD_GNU))
780 if (mode != MODE_FORMAT)
781 format_locus.nextc += format_string_pos;
782 gfc_warning ("Extension: Missing positive width after L "
783 "descriptor at %L", &format_locus);
788 error = posint_required;
819 if (t == FMT_G && u == FMT_ZERO)
826 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: 'G0' in "
827 "format at %L", &format_locus) == FAILURE)
838 error = posint_required;
844 error = _("E specifier not allowed with g0 descriptor");
853 format_locus.nextc += format_string_pos;
854 gfc_error ("Positive width required in format "
855 "specifier %s at %L", token_to_string (t),
866 /* Warn if -std=legacy, otherwise error. */
867 format_locus.nextc += format_string_pos;
868 if (gfc_option.warn_std != 0)
870 gfc_error ("Period required in format "
871 "specifier %s at %L", token_to_string (t),
877 gfc_warning ("Period required in format "
878 "specifier %s at %L", token_to_string (t),
880 /* If we go to finished, we need to unwind this
881 before the next round. */
882 format_locus.nextc -= format_string_pos;
890 if (u != FMT_ZERO && u != FMT_POSINT)
892 error = nonneg_required;
899 /* Look for optional exponent. */
914 error = _("Positive exponent width required");
925 if (t != FMT_ZERO && t != FMT_POSINT)
927 error = nonneg_required;
930 else if (is_input && t == FMT_ZERO)
932 error = posint_required;
941 /* Warn if -std=legacy, otherwise error. */
942 if (gfc_option.warn_std != 0)
944 error = _("Period required in format specifier");
947 if (mode != MODE_FORMAT)
948 format_locus.nextc += format_string_pos;
949 gfc_warning ("Period required in format specifier at %L",
958 if (t != FMT_ZERO && t != FMT_POSINT)
960 error = nonneg_required;
967 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
969 if (mode != MODE_FORMAT)
970 format_locus.nextc += format_string_pos;
971 gfc_warning ("The H format specifier at %L is"
972 " a Fortran 95 deleted feature", &format_locus);
974 if (mode == MODE_STRING)
976 format_string += value;
977 format_length -= value;
978 format_string_pos += repeat;
984 next_char (INSTRING_WARN);
994 if (t != FMT_ZERO && t != FMT_POSINT)
996 error = nonneg_required;
999 else if (is_input && t == FMT_ZERO)
1001 error = posint_required;
1008 if (t != FMT_PERIOD)
1017 if (t != FMT_ZERO && t != FMT_POSINT)
1019 error = nonneg_required;
1027 error = unexpected_element;
1032 /* Between a descriptor and what comes next. */
1050 goto optional_comma;
1053 error = unexpected_end;
1057 if (mode != MODE_FORMAT)
1058 format_locus.nextc += format_string_pos - 1;
1059 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %L",
1060 &format_locus) == FAILURE)
1062 /* If we do not actually return a failure, we need to unwind this
1063 before the next round. */
1064 if (mode != MODE_FORMAT)
1065 format_locus.nextc -= format_string_pos;
1070 /* Optional comma is a weird between state where we've just finished
1071 reading a colon, slash, dollar or P descriptor. */
1088 /* Assume that we have another format item. */
1095 extension_optional_comma:
1096 /* As a GNU extension, permit a missing comma after a string literal. */
1113 goto optional_comma;
1116 error = unexpected_end;
1120 if (mode != MODE_FORMAT)
1121 format_locus.nextc += format_string_pos;
1122 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %L",
1123 &format_locus) == FAILURE)
1125 /* If we do not actually return a failure, we need to unwind this
1126 before the next round. */
1127 if (mode != MODE_FORMAT)
1128 format_locus.nextc -= format_string_pos;
1136 if (mode != MODE_FORMAT)
1137 format_locus.nextc += format_string_pos;
1138 if (error == unexpected_element)
1139 gfc_error (error, error_element, &format_locus);
1141 gfc_error ("%s in format string at %L", error, &format_locus);
1150 /* Given an expression node that is a constant string, see if it looks
1151 like a format string. */
1154 check_format_string (gfc_expr *e, bool is_input)
1158 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
1162 format_string = e->value.character.string;
1164 /* More elaborate measures are needed to show where a problem is within a
1165 format string that has been calculated, but that's probably not worth the
1167 format_locus = e->where;
1168 rv = check_format (is_input);
1169 /* check for extraneous characters at the end of an otherwise valid format
1170 string, like '(A10,I3)F5'
1171 start at the end and move back to the last character processed,
1173 if (rv == SUCCESS && e->value.character.length > format_string_pos)
1174 for (i=e->value.character.length-1;i>format_string_pos-1;i--)
1175 if (e->value.character.string[i] != ' ')
1177 format_locus.nextc += format_length + 1;
1178 gfc_warning ("Extraneous characters in format at %L", &format_locus);
1185 /************ Fortran 95 I/O statement matchers *************/
1187 /* Match a FORMAT statement. This amounts to actually parsing the
1188 format descriptors in order to correctly locate the end of the
1192 gfc_match_format (void)
1197 if (gfc_current_ns->proc_name
1198 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
1200 gfc_error ("Format statement in module main block at %C");
1204 if (gfc_statement_label == NULL)
1206 gfc_error ("Missing format label at %C");
1209 gfc_gobble_whitespace ();
1214 start = gfc_current_locus;
1216 if (check_format (false) == FAILURE)
1219 if (gfc_match_eos () != MATCH_YES)
1221 gfc_syntax_error (ST_FORMAT);
1225 /* The label doesn't get created until after the statement is done
1226 being matched, so we have to leave the string for later. */
1228 gfc_current_locus = start; /* Back to the beginning */
1231 new_st.op = EXEC_NOP;
1233 e = gfc_get_character_expr (gfc_default_character_kind, &start,
1234 NULL, format_length);
1235 format_string = e->value.character.string;
1236 gfc_statement_label->format = e;
1239 check_format (false); /* Guaranteed to succeed */
1240 gfc_match_eos (); /* Guaranteed to succeed */
1246 /* Match an expression I/O tag of some sort. */
1249 match_etag (const io_tag *tag, gfc_expr **v)
1254 m = gfc_match (tag->spec);
1258 m = gfc_match (tag->value, &result);
1261 gfc_error ("Invalid value for %s specification at %C", tag->name);
1267 gfc_error ("Duplicate %s specification at %C", tag->name);
1268 gfc_free_expr (result);
1277 /* Match a variable I/O tag of some sort. */
1280 match_vtag (const io_tag *tag, gfc_expr **v)
1285 m = gfc_match (tag->spec);
1289 m = gfc_match (tag->value, &result);
1292 gfc_error ("Invalid value for %s specification at %C", tag->name);
1298 gfc_error ("Duplicate %s specification at %C", tag->name);
1299 gfc_free_expr (result);
1303 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1305 gfc_error ("Variable %s cannot be INTENT(IN) at %C", tag->name);
1306 gfc_free_expr (result);
1310 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1312 gfc_error ("Variable %s cannot be assigned in PURE procedure at %C",
1314 gfc_free_expr (result);
1318 if (gfc_implicit_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1319 gfc_current_ns->proc_name->attr.implicit_pure = 0;
1326 /* Match I/O tags that cause variables to become redefined. */
1329 match_out_tag (const io_tag *tag, gfc_expr **result)
1333 m = match_vtag (tag, result);
1335 gfc_check_do_variable ((*result)->symtree);
1341 /* Match a label I/O tag. */
1344 match_ltag (const io_tag *tag, gfc_st_label ** label)
1350 m = gfc_match (tag->spec);
1354 m = gfc_match (tag->value, label);
1357 gfc_error ("Invalid value for %s specification at %C", tag->name);
1363 gfc_error ("Duplicate %s label specification at %C", tag->name);
1367 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1374 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1377 resolve_tag_format (const gfc_expr *e)
1379 if (e->expr_type == EXPR_CONSTANT
1380 && (e->ts.type != BT_CHARACTER
1381 || e->ts.kind != gfc_default_character_kind))
1383 gfc_error ("Constant expression in FORMAT tag at %L must be "
1384 "of type default CHARACTER", &e->where);
1388 /* If e's rank is zero and e is not an element of an array, it should be
1389 of integer or character type. The integer variable should be
1392 && (e->expr_type != EXPR_VARIABLE
1393 || e->symtree == NULL
1394 || e->symtree->n.sym->as == NULL
1395 || e->symtree->n.sym->as->rank == 0))
1397 if ((e->ts.type != BT_CHARACTER
1398 || e->ts.kind != gfc_default_character_kind)
1399 && e->ts.type != BT_INTEGER)
1401 gfc_error ("FORMAT tag at %L must be of type default-kind CHARACTER "
1402 "or of INTEGER", &e->where);
1405 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1407 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1408 "variable in FORMAT tag at %L", &e->where)
1411 if (e->symtree->n.sym->attr.assign != 1)
1413 gfc_error ("Variable '%s' at %L has not been assigned a "
1414 "format label", e->symtree->n.sym->name, &e->where);
1418 else if (e->ts.type == BT_INTEGER)
1420 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1421 "variable", gfc_basic_typename (e->ts.type), &e->where);
1428 /* If rank is nonzero and type is not character, we allow it under GFC_STD_LEGACY.
1429 It may be assigned an Hollerith constant. */
1430 if (e->ts.type != BT_CHARACTER)
1432 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1433 "in FORMAT tag at %L", &e->where) == FAILURE)
1436 if (e->rank == 0 && e->symtree->n.sym->as->type == AS_ASSUMED_SHAPE)
1438 gfc_error ("Non-character assumed shape array element in FORMAT"
1439 " tag at %L", &e->where);
1443 if (e->rank == 0 && e->symtree->n.sym->as->type == AS_ASSUMED_SIZE)
1445 gfc_error ("Non-character assumed size array element in FORMAT"
1446 " tag at %L", &e->where);
1450 if (e->rank == 0 && e->symtree->n.sym->attr.pointer)
1452 gfc_error ("Non-character pointer array element in FORMAT tag at %L",
1462 /* Do expression resolution and type-checking on an expression tag. */
1465 resolve_tag (const io_tag *tag, gfc_expr *e)
1470 if (gfc_resolve_expr (e) == FAILURE)
1473 if (tag == &tag_format)
1474 return resolve_tag_format (e);
1476 if (e->ts.type != tag->type)
1478 gfc_error ("%s tag at %L must be of type %s", tag->name,
1479 &e->where, gfc_basic_typename (tag->type));
1483 if (e->ts.type == BT_CHARACTER && e->ts.kind != gfc_default_character_kind)
1485 gfc_error ("%s tag at %L must be a character string of default kind",
1486 tag->name, &e->where);
1492 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1496 if (tag == &tag_iomsg)
1498 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1499 &e->where) == FAILURE)
1503 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1504 && e->ts.kind != gfc_default_integer_kind)
1506 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1507 "INTEGER in %s tag at %L", tag->name, &e->where)
1512 if (tag == &tag_exist && e->ts.kind != gfc_default_logical_kind)
1514 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: Nondefault LOGICAL "
1515 "in %s tag at %L", tag->name, &e->where)
1520 if (tag == &tag_newunit)
1522 if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: NEWUNIT specifier"
1523 " at %L", &e->where) == FAILURE)
1527 /* NEWUNIT, IOSTAT, SIZE and IOMSG are variable definition contexts. */
1528 if (tag == &tag_newunit || tag == &tag_iostat
1529 || tag == &tag_size || tag == &tag_iomsg)
1533 sprintf (context, _("%s tag"), tag->name);
1534 if (gfc_check_vardef_context (e, false, false, context) == FAILURE)
1538 if (tag == &tag_convert)
1540 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1541 &e->where) == FAILURE)
1549 /* Match a single tag of an OPEN statement. */
1552 match_open_element (gfc_open *open)
1556 m = match_etag (&tag_e_async, &open->asynchronous);
1559 m = match_etag (&tag_unit, &open->unit);
1562 m = match_out_tag (&tag_iomsg, &open->iomsg);
1565 m = match_out_tag (&tag_iostat, &open->iostat);
1568 m = match_etag (&tag_file, &open->file);
1571 m = match_etag (&tag_status, &open->status);
1574 m = match_etag (&tag_e_access, &open->access);
1577 m = match_etag (&tag_e_form, &open->form);
1580 m = match_etag (&tag_e_recl, &open->recl);
1583 m = match_etag (&tag_e_blank, &open->blank);
1586 m = match_etag (&tag_e_position, &open->position);
1589 m = match_etag (&tag_e_action, &open->action);
1592 m = match_etag (&tag_e_delim, &open->delim);
1595 m = match_etag (&tag_e_pad, &open->pad);
1598 m = match_etag (&tag_e_decimal, &open->decimal);
1601 m = match_etag (&tag_e_encoding, &open->encoding);
1604 m = match_etag (&tag_e_round, &open->round);
1607 m = match_etag (&tag_e_sign, &open->sign);
1610 m = match_ltag (&tag_err, &open->err);
1613 m = match_etag (&tag_convert, &open->convert);
1616 m = match_out_tag (&tag_newunit, &open->newunit);
1624 /* Free the gfc_open structure and all the expressions it contains. */
1627 gfc_free_open (gfc_open *open)
1632 gfc_free_expr (open->unit);
1633 gfc_free_expr (open->iomsg);
1634 gfc_free_expr (open->iostat);
1635 gfc_free_expr (open->file);
1636 gfc_free_expr (open->status);
1637 gfc_free_expr (open->access);
1638 gfc_free_expr (open->form);
1639 gfc_free_expr (open->recl);
1640 gfc_free_expr (open->blank);
1641 gfc_free_expr (open->position);
1642 gfc_free_expr (open->action);
1643 gfc_free_expr (open->delim);
1644 gfc_free_expr (open->pad);
1645 gfc_free_expr (open->decimal);
1646 gfc_free_expr (open->encoding);
1647 gfc_free_expr (open->round);
1648 gfc_free_expr (open->sign);
1649 gfc_free_expr (open->convert);
1650 gfc_free_expr (open->asynchronous);
1651 gfc_free_expr (open->newunit);
1656 /* Resolve everything in a gfc_open structure. */
1659 gfc_resolve_open (gfc_open *open)
1662 RESOLVE_TAG (&tag_unit, open->unit);
1663 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1664 RESOLVE_TAG (&tag_iostat, open->iostat);
1665 RESOLVE_TAG (&tag_file, open->file);
1666 RESOLVE_TAG (&tag_status, open->status);
1667 RESOLVE_TAG (&tag_e_access, open->access);
1668 RESOLVE_TAG (&tag_e_form, open->form);
1669 RESOLVE_TAG (&tag_e_recl, open->recl);
1670 RESOLVE_TAG (&tag_e_blank, open->blank);
1671 RESOLVE_TAG (&tag_e_position, open->position);
1672 RESOLVE_TAG (&tag_e_action, open->action);
1673 RESOLVE_TAG (&tag_e_delim, open->delim);
1674 RESOLVE_TAG (&tag_e_pad, open->pad);
1675 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1676 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1677 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1678 RESOLVE_TAG (&tag_e_round, open->round);
1679 RESOLVE_TAG (&tag_e_sign, open->sign);
1680 RESOLVE_TAG (&tag_convert, open->convert);
1681 RESOLVE_TAG (&tag_newunit, open->newunit);
1683 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1690 /* Check if a given value for a SPECIFIER is either in the list of values
1691 allowed in F95 or F2003, issuing an error message and returning a zero
1692 value if it is not allowed. */
1695 compare_to_allowed_values (const char *specifier, const char *allowed[],
1696 const char *allowed_f2003[],
1697 const char *allowed_gnu[], gfc_char_t *value,
1698 const char *statement, bool warn)
1703 len = gfc_wide_strlen (value);
1706 for (len--; len > 0; len--)
1707 if (value[len] != ' ')
1712 for (i = 0; allowed[i]; i++)
1713 if (len == strlen (allowed[i])
1714 && gfc_wide_strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1717 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1718 if (len == strlen (allowed_f2003[i])
1719 && gfc_wide_strncasecmp (value, allowed_f2003[i],
1720 strlen (allowed_f2003[i])) == 0)
1722 notification n = gfc_notification_std (GFC_STD_F2003);
1724 if (n == WARNING || (warn && n == ERROR))
1726 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1727 "has value '%s'", specifier, statement,
1734 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1735 "%s statement at %C has value '%s'", specifier,
1736 statement, allowed_f2003[i]);
1744 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1745 if (len == strlen (allowed_gnu[i])
1746 && gfc_wide_strncasecmp (value, allowed_gnu[i],
1747 strlen (allowed_gnu[i])) == 0)
1749 notification n = gfc_notification_std (GFC_STD_GNU);
1751 if (n == WARNING || (warn && n == ERROR))
1753 gfc_warning ("Extension: %s specifier in %s statement at %C "
1754 "has value '%s'", specifier, statement,
1761 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1762 "%s statement at %C has value '%s'", specifier,
1763 statement, allowed_gnu[i]);
1773 char *s = gfc_widechar_to_char (value, -1);
1774 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1775 specifier, statement, s);
1781 char *s = gfc_widechar_to_char (value, -1);
1782 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1783 specifier, statement, s);
1790 /* Match an OPEN statement. */
1793 gfc_match_open (void)
1799 m = gfc_match_char ('(');
1803 open = XCNEW (gfc_open);
1805 m = match_open_element (open);
1807 if (m == MATCH_ERROR)
1811 m = gfc_match_expr (&open->unit);
1812 if (m == MATCH_ERROR)
1818 if (gfc_match_char (')') == MATCH_YES)
1820 if (gfc_match_char (',') != MATCH_YES)
1823 m = match_open_element (open);
1824 if (m == MATCH_ERROR)
1830 if (gfc_match_eos () == MATCH_NO)
1833 if (gfc_pure (NULL))
1835 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1839 if (gfc_implicit_pure (NULL))
1840 gfc_current_ns->proc_name->attr.implicit_pure = 0;
1842 warn = (open->err || open->iostat) ? true : false;
1844 /* Checks on NEWUNIT specifier. */
1849 gfc_error ("UNIT specifier not allowed with NEWUNIT at %C");
1853 if (!(open->file || (open->status
1854 && gfc_wide_strncasecmp (open->status->value.character.string,
1855 "scratch", 7) == 0)))
1857 gfc_error ("NEWUNIT specifier must have FILE= "
1858 "or STATUS='scratch' at %C");
1862 else if (!open->unit)
1864 gfc_error ("OPEN statement at %C must have UNIT or NEWUNIT specified");
1868 /* Checks on the ACCESS specifier. */
1869 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1871 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1872 static const char *access_f2003[] = { "STREAM", NULL };
1873 static const char *access_gnu[] = { "APPEND", NULL };
1875 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1877 open->access->value.character.string,
1882 /* Checks on the ACTION specifier. */
1883 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1885 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1887 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1888 open->action->value.character.string,
1893 /* Checks on the ASYNCHRONOUS specifier. */
1894 if (open->asynchronous)
1896 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1897 "not allowed in Fortran 95") == FAILURE)
1900 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1902 static const char * asynchronous[] = { "YES", "NO", NULL };
1904 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1905 NULL, NULL, open->asynchronous->value.character.string,
1911 /* Checks on the BLANK specifier. */
1914 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1915 "not allowed in Fortran 95") == FAILURE)
1918 if (open->blank->expr_type == EXPR_CONSTANT)
1920 static const char *blank[] = { "ZERO", "NULL", NULL };
1922 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1923 open->blank->value.character.string,
1929 /* Checks on the DECIMAL specifier. */
1932 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1933 "not allowed in Fortran 95") == FAILURE)
1936 if (open->decimal->expr_type == EXPR_CONSTANT)
1938 static const char * decimal[] = { "COMMA", "POINT", NULL };
1940 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1941 open->decimal->value.character.string,
1947 /* Checks on the DELIM specifier. */
1950 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1951 "not allowed in Fortran 95") == FAILURE)
1954 if (open->delim->expr_type == EXPR_CONSTANT)
1956 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1958 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1959 open->delim->value.character.string,
1965 /* Checks on the ENCODING specifier. */
1968 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1969 "not allowed in Fortran 95") == FAILURE)
1972 if (open->encoding->expr_type == EXPR_CONSTANT)
1974 static const char * encoding[] = { "DEFAULT", "UTF-8", NULL };
1976 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1977 open->encoding->value.character.string,
1983 /* Checks on the FORM specifier. */
1984 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1986 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1988 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1989 open->form->value.character.string,
1994 /* Checks on the PAD specifier. */
1995 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1997 static const char *pad[] = { "YES", "NO", NULL };
1999 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
2000 open->pad->value.character.string,
2005 /* Checks on the POSITION specifier. */
2006 if (open->position && open->position->expr_type == EXPR_CONSTANT)
2008 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
2010 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
2011 open->position->value.character.string,
2016 /* Checks on the ROUND specifier. */
2019 if (gfc_notify_std (GFC_STD_F2003, "Fortran F2003: ROUND= at %C "
2020 "not allowed in Fortran 95") == FAILURE)
2023 if (open->round->expr_type == EXPR_CONSTANT)
2025 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
2026 "COMPATIBLE", "PROCESSOR_DEFINED",
2029 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
2030 open->round->value.character.string,
2036 /* Checks on the SIGN specifier. */
2039 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
2040 "not allowed in Fortran 95") == FAILURE)
2043 if (open->sign->expr_type == EXPR_CONSTANT)
2045 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
2048 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
2049 open->sign->value.character.string,
2055 #define warn_or_error(...) \
2058 gfc_warning (__VA_ARGS__); \
2061 gfc_error (__VA_ARGS__); \
2066 /* Checks on the RECL specifier. */
2067 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
2068 && open->recl->ts.type == BT_INTEGER
2069 && mpz_sgn (open->recl->value.integer) != 1)
2071 warn_or_error ("RECL in OPEN statement at %C must be positive");
2074 /* Checks on the STATUS specifier. */
2075 if (open->status && open->status->expr_type == EXPR_CONSTANT)
2077 static const char *status[] = { "OLD", "NEW", "SCRATCH",
2078 "REPLACE", "UNKNOWN", NULL };
2080 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2081 open->status->value.character.string,
2085 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
2086 the FILE= specifier shall appear. */
2087 if (open->file == NULL
2088 && (gfc_wide_strncasecmp (open->status->value.character.string,
2090 || gfc_wide_strncasecmp (open->status->value.character.string,
2093 char *s = gfc_widechar_to_char (open->status->value.character.string,
2095 warn_or_error ("The STATUS specified in OPEN statement at %C is "
2096 "'%s' and no FILE specifier is present", s);
2100 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
2101 the FILE= specifier shall not appear. */
2102 if (gfc_wide_strncasecmp (open->status->value.character.string,
2103 "scratch", 7) == 0 && open->file)
2105 warn_or_error ("The STATUS specified in OPEN statement at %C "
2106 "cannot have the value SCRATCH if a FILE specifier "
2111 /* Things that are not allowed for unformatted I/O. */
2112 if (open->form && open->form->expr_type == EXPR_CONSTANT
2113 && (open->delim || open->decimal || open->encoding || open->round
2114 || open->sign || open->pad || open->blank)
2115 && gfc_wide_strncasecmp (open->form->value.character.string,
2116 "unformatted", 11) == 0)
2118 const char *spec = (open->delim ? "DELIM "
2119 : (open->pad ? "PAD " : open->blank
2122 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
2123 "unformatted I/O", spec);
2126 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
2127 && gfc_wide_strncasecmp (open->access->value.character.string,
2130 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
2135 && open->access && open->access->expr_type == EXPR_CONSTANT
2136 && !(gfc_wide_strncasecmp (open->access->value.character.string,
2137 "sequential", 10) == 0
2138 || gfc_wide_strncasecmp (open->access->value.character.string,
2140 || gfc_wide_strncasecmp (open->access->value.character.string,
2143 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
2144 "for stream or sequential ACCESS");
2147 #undef warn_or_error
2149 new_st.op = EXEC_OPEN;
2150 new_st.ext.open = open;
2154 gfc_syntax_error (ST_OPEN);
2157 gfc_free_open (open);
2162 /* Free a gfc_close structure an all its expressions. */
2165 gfc_free_close (gfc_close *close)
2170 gfc_free_expr (close->unit);
2171 gfc_free_expr (close->iomsg);
2172 gfc_free_expr (close->iostat);
2173 gfc_free_expr (close->status);
2178 /* Match elements of a CLOSE statement. */
2181 match_close_element (gfc_close *close)
2185 m = match_etag (&tag_unit, &close->unit);
2188 m = match_etag (&tag_status, &close->status);
2191 m = match_out_tag (&tag_iomsg, &close->iomsg);
2194 m = match_out_tag (&tag_iostat, &close->iostat);
2197 m = match_ltag (&tag_err, &close->err);
2205 /* Match a CLOSE statement. */
2208 gfc_match_close (void)
2214 m = gfc_match_char ('(');
2218 close = XCNEW (gfc_close);
2220 m = match_close_element (close);
2222 if (m == MATCH_ERROR)
2226 m = gfc_match_expr (&close->unit);
2229 if (m == MATCH_ERROR)
2235 if (gfc_match_char (')') == MATCH_YES)
2237 if (gfc_match_char (',') != MATCH_YES)
2240 m = match_close_element (close);
2241 if (m == MATCH_ERROR)
2247 if (gfc_match_eos () == MATCH_NO)
2250 if (gfc_pure (NULL))
2252 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
2256 if (gfc_implicit_pure (NULL))
2257 gfc_current_ns->proc_name->attr.implicit_pure = 0;
2259 warn = (close->iostat || close->err) ? true : false;
2261 /* Checks on the STATUS specifier. */
2262 if (close->status && close->status->expr_type == EXPR_CONSTANT)
2264 static const char *status[] = { "KEEP", "DELETE", NULL };
2266 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
2267 close->status->value.character.string,
2272 new_st.op = EXEC_CLOSE;
2273 new_st.ext.close = close;
2277 gfc_syntax_error (ST_CLOSE);
2280 gfc_free_close (close);
2285 /* Resolve everything in a gfc_close structure. */
2288 gfc_resolve_close (gfc_close *close)
2290 RESOLVE_TAG (&tag_unit, close->unit);
2291 RESOLVE_TAG (&tag_iomsg, close->iomsg);
2292 RESOLVE_TAG (&tag_iostat, close->iostat);
2293 RESOLVE_TAG (&tag_status, close->status);
2295 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
2298 if (close->unit->expr_type == EXPR_CONSTANT
2299 && close->unit->ts.type == BT_INTEGER
2300 && mpz_sgn (close->unit->value.integer) < 0)
2302 gfc_error ("UNIT number in CLOSE statement at %L must be non-negative",
2303 &close->unit->where);
2310 /* Free a gfc_filepos structure. */
2313 gfc_free_filepos (gfc_filepos *fp)
2315 gfc_free_expr (fp->unit);
2316 gfc_free_expr (fp->iomsg);
2317 gfc_free_expr (fp->iostat);
2322 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
2325 match_file_element (gfc_filepos *fp)
2329 m = match_etag (&tag_unit, &fp->unit);
2332 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2335 m = match_out_tag (&tag_iostat, &fp->iostat);
2338 m = match_ltag (&tag_err, &fp->err);
2346 /* Match the second half of the file-positioning statements, REWIND,
2347 BACKSPACE, ENDFILE, or the FLUSH statement. */
2350 match_filepos (gfc_statement st, gfc_exec_op op)
2355 fp = XCNEW (gfc_filepos);
2357 if (gfc_match_char ('(') == MATCH_NO)
2359 m = gfc_match_expr (&fp->unit);
2360 if (m == MATCH_ERROR)
2368 m = match_file_element (fp);
2369 if (m == MATCH_ERROR)
2373 m = gfc_match_expr (&fp->unit);
2374 if (m == MATCH_ERROR)
2382 if (gfc_match_char (')') == MATCH_YES)
2384 if (gfc_match_char (',') != MATCH_YES)
2387 m = match_file_element (fp);
2388 if (m == MATCH_ERROR)
2395 if (gfc_match_eos () != MATCH_YES)
2398 if (gfc_pure (NULL))
2400 gfc_error ("%s statement not allowed in PURE procedure at %C",
2401 gfc_ascii_statement (st));
2406 if (gfc_implicit_pure (NULL))
2407 gfc_current_ns->proc_name->attr.implicit_pure = 0;
2410 new_st.ext.filepos = fp;
2414 gfc_syntax_error (st);
2417 gfc_free_filepos (fp);
2423 gfc_resolve_filepos (gfc_filepos *fp)
2425 RESOLVE_TAG (&tag_unit, fp->unit);
2426 RESOLVE_TAG (&tag_iostat, fp->iostat);
2427 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2428 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2431 if (fp->unit->expr_type == EXPR_CONSTANT
2432 && fp->unit->ts.type == BT_INTEGER
2433 && mpz_sgn (fp->unit->value.integer) < 0)
2435 gfc_error ("UNIT number in statement at %L must be non-negative",
2443 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2444 and the FLUSH statement. */
2447 gfc_match_endfile (void)
2449 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2453 gfc_match_backspace (void)
2455 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2459 gfc_match_rewind (void)
2461 return match_filepos (ST_REWIND, EXEC_REWIND);
2465 gfc_match_flush (void)
2467 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2471 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2474 /******************** Data Transfer Statements *********************/
2476 /* Return a default unit number. */
2479 default_unit (io_kind k)
2488 return gfc_get_int_expr (gfc_default_integer_kind, NULL, unit);
2492 /* Match a unit specification for a data transfer statement. */
2495 match_dt_unit (io_kind k, gfc_dt *dt)
2499 if (gfc_match_char ('*') == MATCH_YES)
2501 if (dt->io_unit != NULL)
2504 dt->io_unit = default_unit (k);
2508 if (gfc_match_expr (&e) == MATCH_YES)
2510 if (dt->io_unit != NULL)
2523 gfc_error ("Duplicate UNIT specification at %C");
2528 /* Match a format specification. */
2531 match_dt_format (gfc_dt *dt)
2535 gfc_st_label *label;
2538 where = gfc_current_locus;
2540 if (gfc_match_char ('*') == MATCH_YES)
2542 if (dt->format_expr != NULL || dt->format_label != NULL)
2545 dt->format_label = &format_asterisk;
2549 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2553 /* Need to check if the format label is actually either an operand
2554 to a user-defined operator or is a kind type parameter. That is,
2555 print 2.ip.8 ! .ip. is a user-defined operator return CHARACTER.
2556 print 1_'(I0)', i ! 1_'(I0)' is a default character string. */
2558 gfc_gobble_whitespace ();
2559 c = gfc_peek_ascii_char ();
2560 if (c == '.' || c == '_')
2561 gfc_current_locus = where;
2564 if (dt->format_expr != NULL || dt->format_label != NULL)
2566 gfc_free_st_label (label);
2570 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2573 dt->format_label = label;
2577 else if (m == MATCH_ERROR)
2578 /* The label was zero or too large. Emit the correct diagnosis. */
2581 if (gfc_match_expr (&e) == MATCH_YES)
2583 if (dt->format_expr != NULL || dt->format_label != NULL)
2588 dt->format_expr = e;
2592 gfc_current_locus = where; /* The only case where we have to restore */
2597 gfc_error ("Duplicate format specification at %C");
2602 /* Traverse a namelist that is part of a READ statement to make sure
2603 that none of the variables in the namelist are INTENT(IN). Returns
2604 nonzero if we find such a variable. */
2607 check_namelist (gfc_symbol *sym)
2611 for (p = sym->namelist; p; p = p->next)
2612 if (p->sym->attr.intent == INTENT_IN)
2614 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2615 p->sym->name, sym->name);
2623 /* Match a single data transfer element. */
2626 match_dt_element (io_kind k, gfc_dt *dt)
2628 char name[GFC_MAX_SYMBOL_LEN + 1];
2632 if (gfc_match (" unit =") == MATCH_YES)
2634 m = match_dt_unit (k, dt);
2639 if (gfc_match (" fmt =") == MATCH_YES)
2641 m = match_dt_format (dt);
2646 if (gfc_match (" nml = %n", name) == MATCH_YES)
2648 if (dt->namelist != NULL)
2650 gfc_error ("Duplicate NML specification at %C");
2654 if (gfc_find_symbol (name, NULL, 1, &sym))
2657 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2659 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2660 sym != NULL ? sym->name : name);
2665 if (k == M_READ && check_namelist (sym))
2671 m = match_etag (&tag_e_async, &dt->asynchronous);
2674 m = match_etag (&tag_e_blank, &dt->blank);
2677 m = match_etag (&tag_e_delim, &dt->delim);
2680 m = match_etag (&tag_e_pad, &dt->pad);
2683 m = match_etag (&tag_e_sign, &dt->sign);
2686 m = match_etag (&tag_e_round, &dt->round);
2689 m = match_out_tag (&tag_id, &dt->id);
2692 m = match_etag (&tag_e_decimal, &dt->decimal);
2695 m = match_etag (&tag_rec, &dt->rec);
2698 m = match_etag (&tag_spos, &dt->pos);
2701 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2704 m = match_out_tag (&tag_iostat, &dt->iostat);
2707 m = match_ltag (&tag_err, &dt->err);
2709 dt->err_where = gfc_current_locus;
2712 m = match_etag (&tag_advance, &dt->advance);
2715 m = match_out_tag (&tag_size, &dt->size);
2719 m = match_ltag (&tag_end, &dt->end);
2724 gfc_error ("END tag at %C not allowed in output statement");
2727 dt->end_where = gfc_current_locus;
2732 m = match_ltag (&tag_eor, &dt->eor);
2734 dt->eor_where = gfc_current_locus;
2742 /* Free a data transfer structure and everything below it. */
2745 gfc_free_dt (gfc_dt *dt)
2750 gfc_free_expr (dt->io_unit);
2751 gfc_free_expr (dt->format_expr);
2752 gfc_free_expr (dt->rec);
2753 gfc_free_expr (dt->advance);
2754 gfc_free_expr (dt->iomsg);
2755 gfc_free_expr (dt->iostat);
2756 gfc_free_expr (dt->size);
2757 gfc_free_expr (dt->pad);
2758 gfc_free_expr (dt->delim);
2759 gfc_free_expr (dt->sign);
2760 gfc_free_expr (dt->round);
2761 gfc_free_expr (dt->blank);
2762 gfc_free_expr (dt->decimal);
2763 gfc_free_expr (dt->pos);
2764 gfc_free_expr (dt->dt_io_kind);
2765 /* dt->extra_comma is a link to dt_io_kind if it is set. */
2770 /* Resolve everything in a gfc_dt structure. */
2773 gfc_resolve_dt (gfc_dt *dt, locus *loc)
2778 /* This is set in any case. */
2779 gcc_assert (dt->dt_io_kind);
2780 k = dt->dt_io_kind->value.iokind;
2782 RESOLVE_TAG (&tag_format, dt->format_expr);
2783 RESOLVE_TAG (&tag_rec, dt->rec);
2784 RESOLVE_TAG (&tag_spos, dt->pos);
2785 RESOLVE_TAG (&tag_advance, dt->advance);
2786 RESOLVE_TAG (&tag_id, dt->id);
2787 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2788 RESOLVE_TAG (&tag_iostat, dt->iostat);
2789 RESOLVE_TAG (&tag_size, dt->size);
2790 RESOLVE_TAG (&tag_e_pad, dt->pad);
2791 RESOLVE_TAG (&tag_e_delim, dt->delim);
2792 RESOLVE_TAG (&tag_e_sign, dt->sign);
2793 RESOLVE_TAG (&tag_e_round, dt->round);
2794 RESOLVE_TAG (&tag_e_blank, dt->blank);
2795 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2796 RESOLVE_TAG (&tag_e_async, dt->asynchronous);
2801 gfc_error ("UNIT not specified at %L", loc);
2805 if (gfc_resolve_expr (e) == SUCCESS
2806 && (e->ts.type != BT_INTEGER
2807 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2809 /* If there is no extra comma signifying the "format" form of the IO
2810 statement, then this must be an error. */
2811 if (!dt->extra_comma)
2813 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2814 "or a CHARACTER variable", &e->where);
2819 /* At this point, we have an extra comma. If io_unit has arrived as
2820 type character, we assume its really the "format" form of the I/O
2821 statement. We set the io_unit to the default unit and format to
2822 the character expression. See F95 Standard section 9.4. */
2823 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2825 dt->format_expr = dt->io_unit;
2826 dt->io_unit = default_unit (k);
2828 /* Nullify this pointer now so that a warning/error is not
2829 triggered below for the "Extension". */
2830 dt->extra_comma = NULL;
2835 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2836 &dt->extra_comma->where);
2842 if (e->ts.type == BT_CHARACTER)
2844 if (gfc_has_vector_index (e))
2846 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2850 /* If we are writing, make sure the internal unit can be changed. */
2851 gcc_assert (k != M_PRINT);
2853 && gfc_check_vardef_context (e, false, false,
2854 _("internal unit in WRITE")) == FAILURE)
2858 if (e->rank && e->ts.type != BT_CHARACTER)
2860 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2864 if (e->expr_type == EXPR_CONSTANT && e->ts.type == BT_INTEGER
2865 && mpz_sgn (e->value.integer) < 0)
2867 gfc_error ("UNIT number in statement at %L must be non-negative",
2872 /* If we are reading and have a namelist, check that all namelist symbols
2873 can appear in a variable definition context. */
2874 if (k == M_READ && dt->namelist)
2877 for (n = dt->namelist->namelist; n; n = n->next)
2882 e = gfc_get_variable_expr (gfc_find_sym_in_symtree (n->sym));
2883 t = gfc_check_vardef_context (e, false, false, NULL);
2888 gfc_error ("NAMELIST '%s' in READ statement at %L contains"
2889 " the symbol '%s' which may not appear in a"
2890 " variable definition context",
2891 dt->namelist->name, loc, n->sym->name);
2898 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2899 "item list at %L", &dt->extra_comma->where) == FAILURE)
2904 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2906 if (dt->err->defined == ST_LABEL_UNKNOWN)
2908 gfc_error ("ERR tag label %d at %L not defined",
2909 dt->err->value, &dt->err_where);
2916 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2918 if (dt->end->defined == ST_LABEL_UNKNOWN)
2920 gfc_error ("END tag label %d at %L not defined",
2921 dt->end->value, &dt->end_where);
2928 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2930 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2932 gfc_error ("EOR tag label %d at %L not defined",
2933 dt->eor->value, &dt->eor_where);
2938 /* Check the format label actually exists. */
2939 if (dt->format_label && dt->format_label != &format_asterisk
2940 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2942 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2943 &dt->format_label->where);
2951 /* Given an io_kind, return its name. */
2954 io_kind_name (io_kind k)
2973 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2980 /* Match an IO iteration statement of the form:
2982 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2984 which is equivalent to a single IO element. This function is
2985 mutually recursive with match_io_element(). */
2987 static match match_io_element (io_kind, gfc_code **);
2990 match_io_iterator (io_kind k, gfc_code **result)
2992 gfc_code *head, *tail, *new_code;
3000 old_loc = gfc_current_locus;
3002 if (gfc_match_char ('(') != MATCH_YES)
3005 m = match_io_element (k, &head);
3008 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
3014 /* Can't be anything but an IO iterator. Build a list. */
3015 iter = gfc_get_iterator ();
3019 m = gfc_match_iterator (iter, 0);
3020 if (m == MATCH_ERROR)
3024 gfc_check_do_variable (iter->var->symtree);
3028 m = match_io_element (k, &new_code);
3029 if (m == MATCH_ERROR)
3038 tail = gfc_append_code (tail, new_code);
3040 if (gfc_match_char (',') != MATCH_YES)
3049 if (gfc_match_char (')') != MATCH_YES)
3052 new_code = gfc_get_code ();
3053 new_code->op = EXEC_DO;
3054 new_code->ext.iterator = iter;
3056 new_code->block = gfc_get_code ();
3057 new_code->block->op = EXEC_DO;
3058 new_code->block->next = head;
3064 gfc_error ("Syntax error in I/O iterator at %C");
3068 gfc_free_iterator (iter, 1);
3069 gfc_free_statements (head);
3070 gfc_current_locus = old_loc;
3075 /* Match a single element of an IO list, which is either a single
3076 expression or an IO Iterator. */
3079 match_io_element (io_kind k, gfc_code **cpp)
3087 m = match_io_iterator (k, cpp);
3093 m = gfc_match_variable (&expr, 0);
3095 gfc_error ("Expected variable in READ statement at %C");
3099 m = gfc_match_expr (&expr);
3101 gfc_error ("Expected expression in %s statement at %C",
3105 if (m == MATCH_YES && k == M_READ && gfc_check_do_variable (expr->symtree))
3110 gfc_free_expr (expr);
3114 cp = gfc_get_code ();
3115 cp->op = EXEC_TRANSFER;
3118 cp->ext.dt = current_dt;
3125 /* Match an I/O list, building gfc_code structures as we go. */
3128 match_io_list (io_kind k, gfc_code **head_p)
3130 gfc_code *head, *tail, *new_code;
3133 *head_p = head = tail = NULL;
3134 if (gfc_match_eos () == MATCH_YES)
3139 m = match_io_element (k, &new_code);
3140 if (m == MATCH_ERROR)
3145 tail = gfc_append_code (tail, new_code);
3149 if (gfc_match_eos () == MATCH_YES)
3151 if (gfc_match_char (',') != MATCH_YES)
3159 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3162 gfc_free_statements (head);
3167 /* Attach the data transfer end node. */
3170 terminate_io (gfc_code *io_code)
3174 if (io_code == NULL)
3175 io_code = new_st.block;
3177 c = gfc_get_code ();
3178 c->op = EXEC_DT_END;
3180 /* Point to structure that is already there */
3181 c->ext.dt = new_st.ext.dt;
3182 gfc_append_code (io_code, c);
3186 /* Check the constraints for a data transfer statement. The majority of the
3187 constraints appearing in 9.4 of the standard appear here. Some are handled
3188 in resolve_tag and others in gfc_resolve_dt. */
3191 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
3194 #define io_constraint(condition,msg,arg)\
3197 gfc_error(msg,arg);\
3203 gfc_symbol *sym = NULL;
3204 bool warn, unformatted;
3206 warn = (dt->err || dt->iostat) ? true : false;
3207 unformatted = dt->format_expr == NULL && dt->format_label == NULL
3208 && dt->namelist == NULL;
3213 if (expr && expr->expr_type == EXPR_VARIABLE
3214 && expr->ts.type == BT_CHARACTER)
3216 sym = expr->symtree->n.sym;
3218 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
3219 "Internal file at %L must not be INTENT(IN)",
3222 io_constraint (gfc_has_vector_index (dt->io_unit),
3223 "Internal file incompatible with vector subscript at %L",
3226 io_constraint (dt->rec != NULL,
3227 "REC tag at %L is incompatible with internal file",
3230 io_constraint (dt->pos != NULL,
3231 "POS tag at %L is incompatible with internal file",
3234 io_constraint (unformatted,
3235 "Unformatted I/O not allowed with internal unit at %L",
3236 &dt->io_unit->where);
3238 io_constraint (dt->asynchronous != NULL,
3239 "ASYNCHRONOUS tag at %L not allowed with internal file",
3240 &dt->asynchronous->where);
3242 if (dt->namelist != NULL)
3244 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
3245 "at %L with namelist", &expr->where)
3250 io_constraint (dt->advance != NULL,
3251 "ADVANCE tag at %L is incompatible with internal file",
3252 &dt->advance->where);
3255 if (expr && expr->ts.type != BT_CHARACTER)
3258 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
3259 "IO UNIT in %s statement at %C must be "
3260 "an internal file in a PURE procedure",
3263 if (gfc_implicit_pure (NULL) && (k == M_READ || k == M_WRITE))
3264 gfc_current_ns->proc_name->attr.implicit_pure = 0;
3270 io_constraint (dt->end, "END tag not allowed with output at %L",
3273 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
3276 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
3279 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
3282 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
3287 io_constraint (dt->size && dt->advance == NULL,
3288 "SIZE tag at %L requires an ADVANCE tag",
3291 io_constraint (dt->eor && dt->advance == NULL,
3292 "EOR tag at %L requires an ADVANCE tag",
3296 if (dt->asynchronous)
3298 static const char * asynchronous[] = { "YES", "NO", NULL };
3300 if (gfc_reduce_init_expr (dt->asynchronous) != SUCCESS)
3302 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
3303 "expression", &dt->asynchronous->where);
3307 if (!compare_to_allowed_values
3308 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
3309 dt->asynchronous->value.character.string,
3310 io_kind_name (k), warn))
3318 || gfc_wide_strlen (dt->asynchronous->value.character.string) != 3
3319 || gfc_wide_strncasecmp (dt->asynchronous->value.character.string,
3321 io_constraint (not_yes,
3322 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
3323 "specifier", &dt->id->where);
3328 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
3329 "not allowed in Fortran 95") == FAILURE)
3332 if (dt->decimal->expr_type == EXPR_CONSTANT)
3334 static const char * decimal[] = { "COMMA", "POINT", NULL };
3336 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
3337 dt->decimal->value.character.string,
3338 io_kind_name (k), warn))
3341 io_constraint (unformatted,
3342 "the DECIMAL= specifier at %L must be with an "
3343 "explicit format expression", &dt->decimal->where);
3349 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
3350 "not allowed in Fortran 95") == FAILURE)
3353 if (dt->blank->expr_type == EXPR_CONSTANT)
3355 static const char * blank[] = { "NULL", "ZERO", NULL };
3357 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
3358 dt->blank->value.character.string,
3359 io_kind_name (k), warn))
3362 io_constraint (unformatted,
3363 "the BLANK= specifier at %L must be with an "
3364 "explicit format expression", &dt->blank->where);
3370 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
3371 "not allowed in Fortran 95") == FAILURE)
3374 if (dt->pad->expr_type == EXPR_CONSTANT)
3376 static const char * pad[] = { "YES", "NO", NULL };
3378 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3379 dt->pad->value.character.string,
3380 io_kind_name (k), warn))
3383 io_constraint (unformatted,
3384 "the PAD= specifier at %L must be with an "
3385 "explicit format expression", &dt->pad->where);
3391 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3392 "not allowed in Fortran 95") == FAILURE)
3395 if (dt->round->expr_type == EXPR_CONSTANT)
3397 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3398 "COMPATIBLE", "PROCESSOR_DEFINED",
3401 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3402 dt->round->value.character.string,
3403 io_kind_name (k), warn))
3410 /* When implemented, change the following to use gfc_notify_std F2003.
3411 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3412 "not allowed in Fortran 95") == FAILURE)
3413 return MATCH_ERROR; */
3414 if (dt->sign->expr_type == EXPR_CONSTANT)
3416 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3419 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3420 dt->sign->value.character.string,
3421 io_kind_name (k), warn))
3424 io_constraint (unformatted,
3425 "SIGN= specifier at %L must be with an "
3426 "explicit format expression", &dt->sign->where);
3428 io_constraint (k == M_READ,
3429 "SIGN= specifier at %L not allowed in a "
3430 "READ statement", &dt->sign->where);
3436 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3437 "not allowed in Fortran 95") == FAILURE)
3440 if (dt->delim->expr_type == EXPR_CONSTANT)
3442 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3444 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3445 dt->delim->value.character.string,
3446 io_kind_name (k), warn))
3449 io_constraint (k == M_READ,
3450 "DELIM= specifier at %L not allowed in a "
3451 "READ statement", &dt->delim->where);
3453 io_constraint (dt->format_label != &format_asterisk
3454 && dt->namelist == NULL,
3455 "DELIM= specifier at %L must have FMT=*",
3458 io_constraint (unformatted && dt->namelist == NULL,
3459 "DELIM= specifier at %L must be with FMT=* or "
3460 "NML= specifier ", &dt->delim->where);
3466 io_constraint (io_code && dt->namelist,
3467 "NAMELIST cannot be followed by IO-list at %L",
3470 io_constraint (dt->format_expr,
3471 "IO spec-list cannot contain both NAMELIST group name "
3472 "and format specification at %L",
3473 &dt->format_expr->where);
3475 io_constraint (dt->format_label,
3476 "IO spec-list cannot contain both NAMELIST group name "
3477 "and format label at %L", spec_end);
3479 io_constraint (dt->rec,
3480 "NAMELIST IO is not allowed with a REC= specifier "
3481 "at %L", &dt->rec->where);
3483 io_constraint (dt->advance,
3484 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3485 "at %L", &dt->advance->where);
3490 io_constraint (dt->end,
3491 "An END tag is not allowed with a "
3492 "REC= specifier at %L", &dt->end_where);
3494 io_constraint (dt->format_label == &format_asterisk,
3495 "FMT=* is not allowed with a REC= specifier "
3498 io_constraint (dt->pos,
3499 "POS= is not allowed with REC= specifier "
3500 "at %L", &dt->pos->where);
3505 int not_yes, not_no;
3508 io_constraint (dt->format_label == &format_asterisk,
3509 "List directed format(*) is not allowed with a "
3510 "ADVANCE= specifier at %L.", &expr->where);
3512 io_constraint (unformatted,
3513 "the ADVANCE= specifier at %L must appear with an "
3514 "explicit format expression", &expr->where);
3516 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3518 const gfc_char_t *advance = expr->value.character.string;
3519 not_no = gfc_wide_strlen (advance) != 2
3520 || gfc_wide_strncasecmp (advance, "no", 2) != 0;
3521 not_yes = gfc_wide_strlen (advance) != 3
3522 || gfc_wide_strncasecmp (advance, "yes", 3) != 0;
3530 io_constraint (not_no && not_yes,
3531 "ADVANCE= specifier at %L must have value = "
3532 "YES or NO.", &expr->where);
3534 io_constraint (dt->size && not_no && k == M_READ,
3535 "SIZE tag at %L requires an ADVANCE = 'NO'",
3538 io_constraint (dt->eor && not_no && k == M_READ,
3539 "EOR tag at %L requires an ADVANCE = 'NO'",
3543 expr = dt->format_expr;
3544 if (gfc_simplify_expr (expr, 0) == FAILURE
3545 || check_format_string (expr, k == M_READ) == FAILURE)
3550 #undef io_constraint
3553 /* Match a READ, WRITE or PRINT statement. */
3556 match_io (io_kind k)
3558 char name[GFC_MAX_SYMBOL_LEN + 1];
3567 where = gfc_current_locus;
3569 current_dt = dt = XCNEW (gfc_dt);
3570 m = gfc_match_char ('(');
3573 where = gfc_current_locus;
3576 else if (k == M_PRINT)
3578 /* Treat the non-standard case of PRINT namelist. */
3579 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3580 && gfc_match_name (name) == MATCH_YES)
3582 gfc_find_symbol (name, NULL, 1, &sym);
3583 if (sym && sym->attr.flavor == FL_NAMELIST)
3585 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3586 "%C is an extension") == FAILURE)
3592 dt->io_unit = default_unit (k);
3597 gfc_current_locus = where;
3601 if (gfc_current_form == FORM_FREE)
3603 char c = gfc_peek_ascii_char ();
3604 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3611 m = match_dt_format (dt);
3612 if (m == MATCH_ERROR)
3618 dt->io_unit = default_unit (k);
3623 /* Before issuing an error for a malformed 'print (1,*)' type of
3624 error, check for a default-char-expr of the form ('(I0)'). */
3625 if (k == M_PRINT && m == MATCH_YES)
3627 /* Reset current locus to get the initial '(' in an expression. */
3628 gfc_current_locus = where;
3629 dt->format_expr = NULL;
3630 m = match_dt_format (dt);
3632 if (m == MATCH_ERROR)
3634 if (m == MATCH_NO || dt->format_expr == NULL)
3638 dt->io_unit = default_unit (k);
3643 /* Match a control list */
3644 if (match_dt_element (k, dt) == MATCH_YES)
3646 if (match_dt_unit (k, dt) != MATCH_YES)
3649 if (gfc_match_char (')') == MATCH_YES)
3651 if (gfc_match_char (',') != MATCH_YES)
3654 m = match_dt_element (k, dt);
3657 if (m == MATCH_ERROR)
3660 m = match_dt_format (dt);
3663 if (m == MATCH_ERROR)
3666 where = gfc_current_locus;
3668 m = gfc_match_name (name);
3671 gfc_find_symbol (name, NULL, 1, &sym);
3672 if (sym && sym->attr.flavor == FL_NAMELIST)
3675 if (k == M_READ && check_namelist (sym))
3684 gfc_current_locus = where;
3686 goto loop; /* No matches, try regular elements */
3689 if (gfc_match_char (')') == MATCH_YES)
3691 if (gfc_match_char (',') != MATCH_YES)
3697 m = match_dt_element (k, dt);
3700 if (m == MATCH_ERROR)
3703 if (gfc_match_char (')') == MATCH_YES)
3705 if (gfc_match_char (',') != MATCH_YES)
3711 /* Used in check_io_constraints, where no locus is available. */
3712 spec_end = gfc_current_locus;
3714 /* Save the IO kind for later use. */
3715 dt->dt_io_kind = gfc_get_iokind_expr (&gfc_current_locus, k);
3717 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3718 to save the locus. This is used later when resolving transfer statements
3719 that might have a format expression without unit number. */
3720 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3721 dt->extra_comma = dt->dt_io_kind;
3724 if (gfc_match_eos () != MATCH_YES)
3726 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3728 gfc_error ("Expected comma in I/O list at %C");
3733 m = match_io_list (k, &io_code);
3734 if (m == MATCH_ERROR)
3740 /* A full IO statement has been matched. Check the constraints. spec_end is
3741 supplied for cases where no locus is supplied. */
3742 m = check_io_constraints (k, dt, io_code, &spec_end);
3744 if (m == MATCH_ERROR)
3747 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3749 new_st.block = gfc_get_code ();
3750 new_st.block->op = new_st.op;
3751 new_st.block->next = io_code;
3753 terminate_io (io_code);
3758 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3768 gfc_match_read (void)
3770 return match_io (M_READ);
3775 gfc_match_write (void)
3777 return match_io (M_WRITE);
3782 gfc_match_print (void)
3786 m = match_io (M_PRINT);
3790 if (gfc_pure (NULL))
3792 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3796 if (gfc_implicit_pure (NULL))
3797 gfc_current_ns->proc_name->attr.implicit_pure = 0;
3803 /* Free a gfc_inquire structure. */
3806 gfc_free_inquire (gfc_inquire *inquire)
3809 if (inquire == NULL)
3812 gfc_free_expr (inquire->unit);
3813 gfc_free_expr (inquire->file);
3814 gfc_free_expr (inquire->iomsg);
3815 gfc_free_expr (inquire->iostat);
3816 gfc_free_expr (inquire->exist);
3817 gfc_free_expr (inquire->opened);
3818 gfc_free_expr (inquire->number);
3819 gfc_free_expr (inquire->named);
3820 gfc_free_expr (inquire->name);
3821 gfc_free_expr (inquire->access);
3822 gfc_free_expr (inquire->sequential);
3823 gfc_free_expr (inquire->direct);
3824 gfc_free_expr (inquire->form);
3825 gfc_free_expr (inquire->formatted);
3826 gfc_free_expr (inquire->unformatted);
3827 gfc_free_expr (inquire->recl);
3828 gfc_free_expr (inquire->nextrec);
3829 gfc_free_expr (inquire->blank);
3830 gfc_free_expr (inquire->position);
3831 gfc_free_expr (inquire->action);
3832 gfc_free_expr (inquire->read);
3833 gfc_free_expr (inquire->write);
3834 gfc_free_expr (inquire->readwrite);
3835 gfc_free_expr (inquire->delim);
3836 gfc_free_expr (inquire->encoding);
3837 gfc_free_expr (inquire->pad);
3838 gfc_free_expr (inquire->iolength);
3839 gfc_free_expr (inquire->convert);
3840 gfc_free_expr (inquire->strm_pos);
3841 gfc_free_expr (inquire->asynchronous);
3842 gfc_free_expr (inquire->decimal);
3843 gfc_free_expr (inquire->pending);
3844 gfc_free_expr (inquire->id);
3845 gfc_free_expr (inquire->sign);
3846 gfc_free_expr (inquire->size);
3847 gfc_free_expr (inquire->round);
3852 /* Match an element of an INQUIRE statement. */
3854 #define RETM if (m != MATCH_NO) return m;
3857 match_inquire_element (gfc_inquire *inquire)
3861 m = match_etag (&tag_unit, &inquire->unit);
3862 RETM m = match_etag (&tag_file, &inquire->file);
3863 RETM m = match_ltag (&tag_err, &inquire->err);
3864 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3865 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3866 RETM m = match_vtag (&tag_exist, &inquire->exist);
3867 RETM m = match_vtag (&tag_opened, &inquire->opened);
3868 RETM m = match_vtag (&tag_named, &inquire->named);
3869 RETM m = match_vtag (&tag_name, &inquire->name);
3870 RETM m = match_out_tag (&tag_number, &inquire->number);
3871 RETM m = match_vtag (&tag_s_access, &inquire->access);
3872 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3873 RETM m = match_vtag (&tag_direct, &inquire->direct);
3874 RETM m = match_vtag (&tag_s_form, &inquire->form);
3875 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3876 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3877 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3878 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3879 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3880 RETM m = match_vtag (&tag_s_position, &inquire->position);
3881 RETM m = match_vtag (&tag_s_action, &inquire->action);
3882 RETM m = match_vtag (&tag_read, &inquire->read);
3883 RETM m = match_vtag (&tag_write, &inquire->write);
3884 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3885 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3886 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3887 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3888 RETM m = match_vtag (&tag_size, &inquire->size);
3889 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3890 RETM m = match_vtag (&tag_s_round, &inquire->round);
3891 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3892 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3893 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3894 RETM m = match_vtag (&tag_convert, &inquire->convert);
3895 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3896 RETM m = match_vtag (&tag_pending, &inquire->pending);
3897 RETM m = match_vtag (&tag_id, &inquire->id);
3898 RETM return MATCH_NO;
3905 gfc_match_inquire (void)
3907 gfc_inquire *inquire;
3912 m = gfc_match_char ('(');
3916 inquire = XCNEW (gfc_inquire);
3918 loc = gfc_current_locus;
3920 m = match_inquire_element (inquire);
3921 if (m == MATCH_ERROR)
3925 m = gfc_match_expr (&inquire->unit);
3926 if (m == MATCH_ERROR)
3932 /* See if we have the IOLENGTH form of the inquire statement. */
3933 if (inquire->iolength != NULL)
3935 if (gfc_match_char (')') != MATCH_YES)
3938 m = match_io_list (M_INQUIRE, &code);
3939 if (m == MATCH_ERROR)
3944 new_st.op = EXEC_IOLENGTH;
3945 new_st.expr1 = inquire->iolength;
3946 new_st.ext.inquire = inquire;
3948 if (gfc_pure (NULL))
3950 gfc_free_statements (code);
3951 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3955 if (gfc_implicit_pure (NULL))
3956 gfc_current_ns->proc_name->attr.implicit_pure = 0;
3958 new_st.block = gfc_get_code ();
3959 new_st.block->op = EXEC_IOLENGTH;
3960 terminate_io (code);
3961 new_st.block->next = code;
3965 /* At this point, we have the non-IOLENGTH inquire statement. */
3968 if (gfc_match_char (')') == MATCH_YES)
3970 if (gfc_match_char (',') != MATCH_YES)
3973 m = match_inquire_element (inquire);
3974 if (m == MATCH_ERROR)
3979 if (inquire->iolength != NULL)
3981 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3986 if (gfc_match_eos () != MATCH_YES)
3989 if (inquire->unit != NULL && inquire->file != NULL)
3991 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3992 "UNIT specifiers", &loc);
3996 if (inquire->unit == NULL && inquire->file == NULL)
3998 gfc_error ("INQUIRE statement at %L requires either FILE or "
3999 "UNIT specifier", &loc);
4003 if (gfc_pure (NULL))
4005 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
4009 if (gfc_implicit_pure (NULL))
4010 gfc_current_ns->proc_name->attr.implicit_pure = 0;
4012 if (inquire->id != NULL && inquire->pending == NULL)
4014 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
4015 "the ID= specifier", &loc);
4019 new_st.op = EXEC_INQUIRE;
4020 new_st.ext.inquire = inquire;
4024 gfc_syntax_error (ST_INQUIRE);
4027 gfc_free_inquire (inquire);
4032 /* Resolve everything in a gfc_inquire structure. */
4035 gfc_resolve_inquire (gfc_inquire *inquire)
4037 RESOLVE_TAG (&tag_unit, inquire->unit);
4038 RESOLVE_TAG (&tag_file, inquire->file);
4039 RESOLVE_TAG (&tag_id, inquire->id);
4041 /* For INQUIRE, all tags except FILE, ID and UNIT are variable definition
4042 contexts. Thus, use an extended RESOLVE_TAG macro for that. */
4043 #define INQUIRE_RESOLVE_TAG(tag, expr) \
4044 RESOLVE_TAG (tag, expr); \
4048 sprintf (context, _("%s tag with INQUIRE"), (tag)->name); \
4049 if (gfc_check_vardef_context ((expr), false, false, context) == FAILURE) \
4052 INQUIRE_RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
4053 INQUIRE_RESOLVE_TAG (&tag_iostat, inquire->iostat);
4054 INQUIRE_RESOLVE_TAG (&tag_exist, inquire->exist);
4055 INQUIRE_RESOLVE_TAG (&tag_opened, inquire->opened);
4056 INQUIRE_RESOLVE_TAG (&tag_number, inquire->number);
4057 INQUIRE_RESOLVE_TAG (&tag_named, inquire->named);
4058 INQUIRE_RESOLVE_TAG (&tag_name, inquire->name);
4059 INQUIRE_RESOLVE_TAG (&tag_s_access, inquire->access);
4060 INQUIRE_RESOLVE_TAG (&tag_sequential, inquire->sequential);
4061 INQUIRE_RESOLVE_TAG (&tag_direct, inquire->direct);
4062 INQUIRE_RESOLVE_TAG (&tag_s_form, inquire->form);
4063 INQUIRE_RESOLVE_TAG (&tag_formatted, inquire->formatted);
4064 INQUIRE_RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
4065 INQUIRE_RESOLVE_TAG (&tag_s_recl, inquire->recl);
4066 INQUIRE_RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
4067 INQUIRE_RESOLVE_TAG (&tag_s_blank, inquire->blank);
4068 INQUIRE_RESOLVE_TAG (&tag_s_position, inquire->position);
4069 INQUIRE_RESOLVE_TAG (&tag_s_action, inquire->action);
4070 INQUIRE_RESOLVE_TAG (&tag_read, inquire->read);
4071 INQUIRE_RESOLVE_TAG (&tag_write, inquire->write);
4072 INQUIRE_RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
4073 INQUIRE_RESOLVE_TAG (&tag_s_delim, inquire->delim);
4074 INQUIRE_RESOLVE_TAG (&tag_s_pad, inquire->pad);
4075 INQUIRE_RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
4076 INQUIRE_RESOLVE_TAG (&tag_s_round, inquire->round);
4077 INQUIRE_RESOLVE_TAG (&tag_iolength, inquire->iolength);
4078 INQUIRE_RESOLVE_TAG (&tag_convert, inquire->convert);
4079 INQUIRE_RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
4080 INQUIRE_RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
4081 INQUIRE_RESOLVE_TAG (&tag_s_sign, inquire->sign);
4082 INQUIRE_RESOLVE_TAG (&tag_s_round, inquire->round);
4083 INQUIRE_RESOLVE_TAG (&tag_pending, inquire->pending);
4084 INQUIRE_RESOLVE_TAG (&tag_size, inquire->size);
4085 INQUIRE_RESOLVE_TAG (&tag_s_decimal, inquire->decimal);
4086 #undef INQUIRE_RESOLVE_TAG
4088 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
4096 gfc_free_wait (gfc_wait *wait)
4101 gfc_free_expr (wait->unit);
4102 gfc_free_expr (wait->iostat);
4103 gfc_free_expr (wait->iomsg);
4104 gfc_free_expr (wait->id);
4109 gfc_resolve_wait (gfc_wait *wait)
4111 RESOLVE_TAG (&tag_unit, wait->unit);
4112 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
4113 RESOLVE_TAG (&tag_iostat, wait->iostat);
4114 RESOLVE_TAG (&tag_id, wait->id);
4116 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
4119 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
4125 /* Match an element of a WAIT statement. */
4127 #define RETM if (m != MATCH_NO) return m;
4130 match_wait_element (gfc_wait *wait)
4134 m = match_etag (&tag_unit, &wait->unit);
4135 RETM m = match_ltag (&tag_err, &wait->err);
4136 RETM m = match_ltag (&tag_end, &wait->eor);
4137 RETM m = match_ltag (&tag_eor, &wait->end);
4138 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
4139 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
4140 RETM m = match_etag (&tag_id, &wait->id);
4141 RETM return MATCH_NO;
4148 gfc_match_wait (void)
4153 m = gfc_match_char ('(');
4157 wait = XCNEW (gfc_wait);
4159 m = match_wait_element (wait);
4160 if (m == MATCH_ERROR)
4164 m = gfc_match_expr (&wait->unit);
4165 if (m == MATCH_ERROR)
4173 if (gfc_match_char (')') == MATCH_YES)
4175 if (gfc_match_char (',') != MATCH_YES)
4178 m = match_wait_element (wait);
4179 if (m == MATCH_ERROR)
4185 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
4186 "not allowed in Fortran 95") == FAILURE)
4189 if (gfc_pure (NULL))
4191 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
4195 if (gfc_implicit_pure (NULL))
4196 gfc_current_ns->proc_name->attr.implicit_pure = 0;
4198 new_st.op = EXEC_WAIT;
4199 new_st.ext.wait = wait;
4204 gfc_syntax_error (ST_WAIT);
4207 gfc_free_wait (wait);