1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Contributed by Andy Vaught
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
30 format_asterisk = {0, NULL, NULL, -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL,
35 const char *name, *spec, *value;
41 tag_file = { "FILE", " file =", " %e", BT_CHARACTER },
42 tag_status = { "STATUS", " status =", " %e", BT_CHARACTER},
43 tag_e_access = {"ACCESS", " access =", " %e", BT_CHARACTER},
44 tag_e_form = {"FORM", " form =", " %e", BT_CHARACTER},
45 tag_e_recl = {"RECL", " recl =", " %e", BT_INTEGER},
46 tag_e_blank = {"BLANK", " blank =", " %e", BT_CHARACTER},
47 tag_e_position = {"POSITION", " position =", " %e", BT_CHARACTER},
48 tag_e_action = {"ACTION", " action =", " %e", BT_CHARACTER},
49 tag_e_delim = {"DELIM", " delim =", " %e", BT_CHARACTER},
50 tag_e_pad = {"PAD", " pad =", " %e", BT_CHARACTER},
51 tag_e_decimal = {"DECIMAL", " decimal =", " %e", BT_CHARACTER},
52 tag_e_encoding = {"ENCODING", " encoding =", " %e", BT_CHARACTER},
53 tag_e_async = {"ASYNCHRONOUS", " asynchronous =", " %e", BT_CHARACTER},
54 tag_e_round = {"ROUND", " round =", " %e", BT_CHARACTER},
55 tag_e_sign = {"SIGN", " sign =", " %e", BT_CHARACTER},
56 tag_unit = {"UNIT", " unit =", " %e", BT_INTEGER},
57 tag_advance = {"ADVANCE", " advance =", " %e", BT_CHARACTER},
58 tag_rec = {"REC", " rec =", " %e", BT_INTEGER},
59 tag_spos = {"POSITION", " pos =", " %e", BT_INTEGER},
60 tag_format = {"FORMAT", NULL, NULL, BT_CHARACTER},
61 tag_iomsg = {"IOMSG", " iomsg =", " %e", BT_CHARACTER},
62 tag_iostat = {"IOSTAT", " iostat =", " %v", BT_INTEGER},
63 tag_size = {"SIZE", " size =", " %v", BT_INTEGER},
64 tag_exist = {"EXIST", " exist =", " %v", BT_LOGICAL},
65 tag_opened = {"OPENED", " opened =", " %v", BT_LOGICAL},
66 tag_named = {"NAMED", " named =", " %v", BT_LOGICAL},
67 tag_name = {"NAME", " name =", " %v", BT_CHARACTER},
68 tag_number = {"NUMBER", " number =", " %v", BT_INTEGER},
69 tag_s_access = {"ACCESS", " access =", " %v", BT_CHARACTER},
70 tag_sequential = {"SEQUENTIAL", " sequential =", " %v", BT_CHARACTER},
71 tag_direct = {"DIRECT", " direct =", " %v", BT_CHARACTER},
72 tag_s_form = {"FORM", " form =", " %v", BT_CHARACTER},
73 tag_formatted = {"FORMATTED", " formatted =", " %v", BT_CHARACTER},
74 tag_unformatted = {"UNFORMATTED", " unformatted =", " %v", BT_CHARACTER},
75 tag_s_recl = {"RECL", " recl =", " %v", BT_INTEGER},
76 tag_nextrec = {"NEXTREC", " nextrec =", " %v", BT_INTEGER},
77 tag_s_blank = {"BLANK", " blank =", " %v", BT_CHARACTER},
78 tag_s_position = {"POSITION", " position =", " %v", BT_CHARACTER},
79 tag_s_action = {"ACTION", " action =", " %v", BT_CHARACTER},
80 tag_read = {"READ", " read =", " %v", BT_CHARACTER},
81 tag_write = {"WRITE", " write =", " %v", BT_CHARACTER},
82 tag_readwrite = {"READWRITE", " readwrite =", " %v", BT_CHARACTER},
83 tag_s_delim = {"DELIM", " delim =", " %v", BT_CHARACTER},
84 tag_s_pad = {"PAD", " pad =", " %v", BT_CHARACTER},
85 tag_s_decimal = {"DECIMAL", " decimal =", " %v", BT_CHARACTER},
86 tag_s_encoding = {"ENCODING", " encoding =", " %v", BT_CHARACTER},
87 tag_s_async = {"ASYNCHRONOUS", " asynchronous =", " %v", BT_CHARACTER},
88 tag_s_round = {"ROUND", " round =", " %v", BT_CHARACTER},
89 tag_s_sign = {"SIGN", " sign =", " %v", BT_CHARACTER},
90 tag_iolength = {"IOLENGTH", " iolength =", " %v", BT_INTEGER},
91 tag_convert = {"CONVERT", " convert =", " %e", BT_CHARACTER},
92 tag_strm_out = {"POS", " pos =", " %v", BT_INTEGER},
93 tag_err = {"ERR", " err =", " %l", BT_UNKNOWN},
94 tag_end = {"END", " end =", " %l", BT_UNKNOWN},
95 tag_eor = {"EOR", " eor =", " %l", BT_UNKNOWN},
96 tag_id = {"ID", " id =", " %v", BT_INTEGER},
97 tag_pending = {"PENDING", " pending =", " %v", BT_LOGICAL};
99 static gfc_dt *current_dt;
101 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
104 /**************** Fortran 95 FORMAT parser *****************/
106 /* FORMAT tokens returned by format_lex(). */
109 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
110 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_POS, FMT_LPAREN,
111 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
112 FMT_E, FMT_EXT, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END, FMT_ERROR, FMT_DC,
117 /* Local variables for checking format strings. The saved_token is
118 used to back up by a single format token during the parsing
120 static char *format_string;
121 static int format_length, use_last_char;
123 static format_token saved_token;
126 { MODE_STRING, MODE_FORMAT, MODE_COPY }
130 /* Return the next character in the format string. */
133 next_char (int in_string)
145 if (mode == MODE_STRING)
146 c = *format_string++;
149 c = gfc_next_char_literal (in_string);
154 if (gfc_option.flag_backslash && c == '\\')
156 locus old_locus = gfc_current_locus;
158 if (gfc_match_special_char (&c) == MATCH_NO)
159 gfc_current_locus = old_locus;
161 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
162 gfc_warning ("Extension: backslash character at %C");
165 if (mode == MODE_COPY)
166 *format_string++ = c;
168 c = TOUPPER ((unsigned char) c);
173 /* Back up one character position. Only works once. */
181 /* Eat up the spaces and return a character. */
184 next_char_not_space (bool *error)
192 if (gfc_option.allow_std & GFC_STD_GNU)
193 gfc_warning ("Extension: Tab character in format at %C");
196 gfc_error ("Extension: Tab character in format at %C");
202 while (gfc_is_whitespace (c));
206 static int value = 0;
208 /* Simple lexical analyzer for getting the next token in a FORMAT
220 if (saved_token != FMT_NONE)
223 saved_token = FMT_NONE;
227 c = next_char_not_space (&error);
235 c = next_char_not_space (&error);
246 c = next_char_not_space (&error);
248 value = 10 * value + c - '0';
257 token = FMT_SIGNED_INT;
276 c = next_char_not_space (&error);
279 value = 10 * value + c - '0';
287 token = zflag ? FMT_ZERO : FMT_POSINT;
311 c = next_char_not_space (&error);
312 if (c != 'L' && c != 'R')
331 c = next_char_not_space (&error);
332 if (c != 'P' && c != 'S')
339 c = next_char_not_space (&error);
340 if (c == 'N' || c == 'Z')
401 c = next_char_not_space (&error);
402 if (c == 'N' || c == 'S')
429 c = next_char_not_space (&error);
432 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DP format "
433 "specifier not allowed at %C") == FAILURE)
439 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DC format "
440 "specifier not allowed at %C") == FAILURE)
467 /* Check a format statement. The format string, either from a FORMAT
468 statement or a constant in an I/O statement has already been parsed
469 by itself, and we are checking it for validity. The dual origin
470 means that the warning message is a little less than great. */
473 check_format (bool is_input)
475 const char *posint_required = _("Positive width required");
476 const char *nonneg_required = _("Nonnegative width required");
477 const char *unexpected_element = _("Unexpected element");
478 const char *unexpected_end = _("Unexpected end of format string");
487 saved_token = FMT_NONE;
497 error = _("Missing leading left parenthesis");
505 goto finished; /* Empty format is legal */
509 /* In this state, the next thing has to be a format item. */
538 /* Signed integer can only precede a P format. */
544 error = _("Expected P edit descriptor");
551 /* P requires a prior number. */
552 error = _("P descriptor requires leading scale factor");
556 /* X requires a prior number if we're being pedantic. */
557 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
558 "requires leading space count at %C")
570 goto extension_optional_comma;
581 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %C")
584 if (t != FMT_RPAREN || level > 0)
586 gfc_warning ("$ should be the last specifier in format at %C");
587 goto optional_comma_1;
605 error = unexpected_end;
609 error = unexpected_element;
614 /* In this state, t must currently be a data descriptor.
615 Deal with things that can/must follow the descriptor. */
633 error = _("Repeat count cannot follow P descriptor");
650 switch (gfc_notification_std (GFC_STD_GNU))
653 gfc_warning ("Extension: Missing positive width after L "
659 error = posint_required;
688 error = posint_required;
697 /* Warn if -std=legacy, otherwise error. */
698 if (gfc_option.warn_std != 0)
699 gfc_error_now ("Period required in format specifier at %C");
701 gfc_warning ("Period required in format specifier at %C");
709 if (u != FMT_ZERO && u != FMT_POSINT)
711 error = nonneg_required;
718 /* Look for optional exponent. */
733 error = _("Positive exponent width required");
744 if (t != FMT_ZERO && t != FMT_POSINT)
746 error = nonneg_required;
749 else if (is_input && t == FMT_ZERO)
751 error = posint_required;
760 /* Warn if -std=legacy, otherwise error. */
761 if (gfc_option.warn_std != 0)
762 gfc_error_now ("Period required in format specifier at %C");
764 gfc_warning ("Period required in format specifier at %C");
772 if (t != FMT_ZERO && t != FMT_POSINT)
774 error = nonneg_required;
781 if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
782 gfc_warning ("The H format specifier at %C is"
783 " a Fortran 95 deleted feature");
785 if(mode == MODE_STRING)
787 format_string += value;
788 format_length -= value;
804 if (t != FMT_ZERO && t != FMT_POSINT)
806 error = nonneg_required;
809 else if (is_input && t == FMT_ZERO)
811 error = posint_required;
827 if (t != FMT_ZERO && t != FMT_POSINT)
829 error = nonneg_required;
837 error = unexpected_element;
842 /* Between a descriptor and what comes next. */
863 error = unexpected_end;
867 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
874 /* Optional comma is a weird between state where we've just finished
875 reading a colon, slash, dollar or P descriptor. */
892 /* Assume that we have another format item. */
899 extension_optional_comma:
900 /* As a GNU extension, permit a missing comma after a string literal. */
920 error = unexpected_end;
924 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
934 gfc_error ("%s in format string at %C", error);
936 /* TODO: More elaborate measures are needed to show where a problem
937 is within a format string that has been calculated. */
945 /* Given an expression node that is a constant string, see if it looks
946 like a format string. */
949 check_format_string (gfc_expr *e, bool is_input)
951 if (!e || e->ts.type != BT_CHARACTER || e->expr_type != EXPR_CONSTANT)
955 format_string = e->value.character.string;
956 return check_format (is_input);
960 /************ Fortran 95 I/O statement matchers *************/
962 /* Match a FORMAT statement. This amounts to actually parsing the
963 format descriptors in order to correctly locate the end of the
967 gfc_match_format (void)
972 if (gfc_current_ns->proc_name
973 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
975 gfc_error ("Format statement in module main block at %C");
979 if (gfc_statement_label == NULL)
981 gfc_error ("Missing format label at %C");
984 gfc_gobble_whitespace ();
989 start = gfc_current_locus;
991 if (check_format (false) == FAILURE)
994 if (gfc_match_eos () != MATCH_YES)
996 gfc_syntax_error (ST_FORMAT);
1000 /* The label doesn't get created until after the statement is done
1001 being matched, so we have to leave the string for later. */
1003 gfc_current_locus = start; /* Back to the beginning */
1006 new_st.op = EXEC_NOP;
1009 e->expr_type = EXPR_CONSTANT;
1010 e->ts.type = BT_CHARACTER;
1011 e->ts.kind = gfc_default_character_kind;
1013 e->value.character.string = format_string = gfc_getmem (format_length + 1);
1014 e->value.character.length = format_length;
1015 gfc_statement_label->format = e;
1018 check_format (false); /* Guaranteed to succeed */
1019 gfc_match_eos (); /* Guaranteed to succeed */
1025 /* Match an expression I/O tag of some sort. */
1028 match_etag (const io_tag *tag, gfc_expr **v)
1033 m = gfc_match (tag->spec);
1037 m = gfc_match (tag->value, &result);
1040 gfc_error ("Invalid value for %s specification at %C", tag->name);
1046 gfc_error ("Duplicate %s specification at %C", tag->name);
1047 gfc_free_expr (result);
1056 /* Match a variable I/O tag of some sort. */
1059 match_vtag (const io_tag *tag, gfc_expr **v)
1064 m = gfc_match (tag->spec);
1068 m = gfc_match (tag->value, &result);
1071 gfc_error ("Invalid value for %s specification at %C", tag->name);
1077 gfc_error ("Duplicate %s specification at %C", tag->name);
1078 gfc_free_expr (result);
1082 if (result->symtree->n.sym->attr.intent == INTENT_IN)
1084 gfc_error ("Variable tag cannot be INTENT(IN) at %C");
1085 gfc_free_expr (result);
1089 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
1091 gfc_error ("Variable tag cannot be assigned in PURE procedure at %C");
1092 gfc_free_expr (result);
1101 /* Match I/O tags that cause variables to become redefined. */
1104 match_out_tag(const io_tag *tag, gfc_expr **result)
1108 m = match_vtag(tag, result);
1110 gfc_check_do_variable((*result)->symtree);
1116 /* Match a label I/O tag. */
1119 match_ltag (const io_tag *tag, gfc_st_label ** label)
1125 m = gfc_match (tag->spec);
1129 m = gfc_match (tag->value, label);
1132 gfc_error ("Invalid value for %s specification at %C", tag->name);
1138 gfc_error ("Duplicate %s label specification at %C", tag->name);
1142 if (gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
1149 /* Resolution of the FORMAT tag, to be called from resolve_tag. */
1152 resolve_tag_format (const gfc_expr *e)
1154 if (e->expr_type == EXPR_CONSTANT
1155 && (e->ts.type != BT_CHARACTER
1156 || e->ts.kind != gfc_default_character_kind))
1158 gfc_error ("Constant expression in FORMAT tag at %L must be "
1159 "of type default CHARACTER", &e->where);
1163 /* If e's rank is zero and e is not an element of an array, it should be
1164 of integer or character type. The integer variable should be
1166 if (e->symtree == NULL || e->symtree->n.sym->as == NULL
1167 || e->symtree->n.sym->as->rank == 0)
1169 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1171 gfc_error ("FORMAT tag at %L must be of type CHARACTER or INTEGER",
1175 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1177 if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGNED "
1178 "variable in FORMAT tag at %L", &e->where)
1181 if (e->symtree->n.sym->attr.assign != 1)
1183 gfc_error ("Variable '%s' at %L has not been assigned a "
1184 "format label", e->symtree->n.sym->name, &e->where);
1188 else if (e->ts.type == BT_INTEGER)
1190 gfc_error ("Scalar '%s' in FORMAT tag at %L is not an ASSIGNED "
1191 "variable", gfc_basic_typename (e->ts.type), &e->where);
1198 /* If rank is nonzero, we allow the type to be character under GFC_STD_GNU
1199 and other type under GFC_STD_LEGACY. It may be assigned an Hollerith
1201 if (e->ts.type == BT_CHARACTER)
1203 if (gfc_notify_std (GFC_STD_GNU, "Extension: Character array "
1204 "in FORMAT tag at %L", &e->where) == FAILURE)
1209 if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Non-character "
1210 "in FORMAT tag at %L", &e->where) == FAILURE)
1218 /* Do expression resolution and type-checking on an expression tag. */
1221 resolve_tag (const io_tag *tag, gfc_expr *e)
1226 if (gfc_resolve_expr (e) == FAILURE)
1229 if (tag == &tag_format)
1230 return resolve_tag_format (e);
1232 if (e->ts.type != tag->type)
1234 gfc_error ("%s tag at %L must be of type %s", tag->name,
1235 &e->where, gfc_basic_typename (tag->type));
1241 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1245 if (tag == &tag_iomsg)
1247 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1248 &e->where) == FAILURE)
1252 if ((tag == &tag_iostat || tag == &tag_size || tag == &tag_iolength)
1253 && e->ts.kind != gfc_default_integer_kind)
1255 if (gfc_notify_std (GFC_STD_F2003, "Fortran 95 requires default "
1256 "INTEGER in %s tag at %L", tag->name, &e->where)
1261 if (tag == &tag_convert)
1263 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1264 &e->where) == FAILURE)
1272 /* Match a single tag of an OPEN statement. */
1275 match_open_element (gfc_open *open)
1279 m = match_etag (&tag_e_async, &open->asynchronous);
1282 m = match_etag (&tag_unit, &open->unit);
1285 m = match_out_tag (&tag_iomsg, &open->iomsg);
1288 m = match_out_tag (&tag_iostat, &open->iostat);
1291 m = match_etag (&tag_file, &open->file);
1294 m = match_etag (&tag_status, &open->status);
1297 m = match_etag (&tag_e_access, &open->access);
1300 m = match_etag (&tag_e_form, &open->form);
1303 m = match_etag (&tag_e_recl, &open->recl);
1306 m = match_etag (&tag_e_blank, &open->blank);
1309 m = match_etag (&tag_e_position, &open->position);
1312 m = match_etag (&tag_e_action, &open->action);
1315 m = match_etag (&tag_e_delim, &open->delim);
1318 m = match_etag (&tag_e_pad, &open->pad);
1321 m = match_etag (&tag_e_decimal, &open->decimal);
1324 m = match_etag (&tag_e_encoding, &open->encoding);
1327 m = match_etag (&tag_e_round, &open->round);
1330 m = match_etag (&tag_e_sign, &open->sign);
1333 m = match_ltag (&tag_err, &open->err);
1336 m = match_etag (&tag_convert, &open->convert);
1344 /* Free the gfc_open structure and all the expressions it contains. */
1347 gfc_free_open (gfc_open *open)
1352 gfc_free_expr (open->unit);
1353 gfc_free_expr (open->iomsg);
1354 gfc_free_expr (open->iostat);
1355 gfc_free_expr (open->file);
1356 gfc_free_expr (open->status);
1357 gfc_free_expr (open->access);
1358 gfc_free_expr (open->form);
1359 gfc_free_expr (open->recl);
1360 gfc_free_expr (open->blank);
1361 gfc_free_expr (open->position);
1362 gfc_free_expr (open->action);
1363 gfc_free_expr (open->delim);
1364 gfc_free_expr (open->pad);
1365 gfc_free_expr (open->decimal);
1366 gfc_free_expr (open->encoding);
1367 gfc_free_expr (open->round);
1368 gfc_free_expr (open->sign);
1369 gfc_free_expr (open->convert);
1370 gfc_free_expr (open->asynchronous);
1375 /* Resolve everything in a gfc_open structure. */
1378 gfc_resolve_open (gfc_open *open)
1381 RESOLVE_TAG (&tag_unit, open->unit);
1382 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1383 RESOLVE_TAG (&tag_iostat, open->iostat);
1384 RESOLVE_TAG (&tag_file, open->file);
1385 RESOLVE_TAG (&tag_status, open->status);
1386 RESOLVE_TAG (&tag_e_access, open->access);
1387 RESOLVE_TAG (&tag_e_form, open->form);
1388 RESOLVE_TAG (&tag_e_recl, open->recl);
1389 RESOLVE_TAG (&tag_e_blank, open->blank);
1390 RESOLVE_TAG (&tag_e_position, open->position);
1391 RESOLVE_TAG (&tag_e_action, open->action);
1392 RESOLVE_TAG (&tag_e_delim, open->delim);
1393 RESOLVE_TAG (&tag_e_pad, open->pad);
1394 RESOLVE_TAG (&tag_e_decimal, open->decimal);
1395 RESOLVE_TAG (&tag_e_encoding, open->encoding);
1396 RESOLVE_TAG (&tag_e_async, open->asynchronous);
1397 RESOLVE_TAG (&tag_e_round, open->round);
1398 RESOLVE_TAG (&tag_e_sign, open->sign);
1399 RESOLVE_TAG (&tag_convert, open->convert);
1401 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1408 /* Check if a given value for a SPECIFIER is either in the list of values
1409 allowed in F95 or F2003, issuing an error message and returning a zero
1410 value if it is not allowed. */
1413 compare_to_allowed_values (const char *specifier, const char *allowed[],
1414 const char *allowed_f2003[],
1415 const char *allowed_gnu[], char *value,
1416 const char *statement, bool warn)
1421 len = strlen (value);
1424 for (len--; len > 0; len--)
1425 if (value[len] != ' ')
1430 for (i = 0; allowed[i]; i++)
1431 if (len == strlen (allowed[i])
1432 && strncasecmp (value, allowed[i], strlen (allowed[i])) == 0)
1435 for (i = 0; allowed_f2003 && allowed_f2003[i]; i++)
1436 if (len == strlen (allowed_f2003[i])
1437 && strncasecmp (value, allowed_f2003[i], strlen (allowed_f2003[i]))
1440 notification n = gfc_notification_std (GFC_STD_F2003);
1442 if (n == WARNING || (warn && n == ERROR))
1444 gfc_warning ("Fortran 2003: %s specifier in %s statement at %C "
1445 "has value '%s'", specifier, statement,
1452 gfc_notify_std (GFC_STD_F2003, "Fortran 2003: %s specifier in "
1453 "%s statement at %C has value '%s'", specifier,
1454 statement, allowed_f2003[i]);
1462 for (i = 0; allowed_gnu && allowed_gnu[i]; i++)
1463 if (len == strlen (allowed_gnu[i])
1464 && strncasecmp (value, allowed_gnu[i], strlen (allowed_gnu[i])) == 0)
1466 notification n = gfc_notification_std (GFC_STD_GNU);
1468 if (n == WARNING || (warn && n == ERROR))
1470 gfc_warning ("Extension: %s specifier in %s statement at %C "
1471 "has value '%s'", specifier, statement,
1478 gfc_notify_std (GFC_STD_GNU, "Extension: %s specifier in "
1479 "%s statement at %C has value '%s'", specifier,
1480 statement, allowed_gnu[i]);
1490 gfc_warning ("%s specifier in %s statement at %C has invalid value '%s'",
1491 specifier, statement, value);
1496 gfc_error ("%s specifier in %s statement at %C has invalid value '%s'",
1497 specifier, statement, value);
1503 /* Match an OPEN statement. */
1506 gfc_match_open (void)
1512 m = gfc_match_char ('(');
1516 open = gfc_getmem (sizeof (gfc_open));
1518 m = match_open_element (open);
1520 if (m == MATCH_ERROR)
1524 m = gfc_match_expr (&open->unit);
1527 if (m == MATCH_ERROR)
1533 if (gfc_match_char (')') == MATCH_YES)
1535 if (gfc_match_char (',') != MATCH_YES)
1538 m = match_open_element (open);
1539 if (m == MATCH_ERROR)
1545 if (gfc_match_eos () == MATCH_NO)
1548 if (gfc_pure (NULL))
1550 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1554 warn = (open->err || open->iostat) ? true : false;
1555 /* Checks on the ACCESS specifier. */
1556 if (open->access && open->access->expr_type == EXPR_CONSTANT)
1558 static const char *access_f95[] = { "SEQUENTIAL", "DIRECT", NULL };
1559 static const char *access_f2003[] = { "STREAM", NULL };
1560 static const char *access_gnu[] = { "APPEND", NULL };
1562 if (!compare_to_allowed_values ("ACCESS", access_f95, access_f2003,
1564 open->access->value.character.string,
1569 /* Checks on the ACTION specifier. */
1570 if (open->action && open->action->expr_type == EXPR_CONSTANT)
1572 static const char *action[] = { "READ", "WRITE", "READWRITE", NULL };
1574 if (!compare_to_allowed_values ("ACTION", action, NULL, NULL,
1575 open->action->value.character.string,
1580 /* Checks on the ASYNCHRONOUS specifier. */
1581 if (open->asynchronous)
1583 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS= at %C "
1584 "not allowed in Fortran 95") == FAILURE)
1587 if (open->asynchronous->expr_type == EXPR_CONSTANT)
1589 static const char * asynchronous[] = { "YES", "NO", NULL };
1591 if (!compare_to_allowed_values ("ASYNCHRONOUS", asynchronous,
1592 NULL, NULL, open->asynchronous->value.character.string,
1598 /* Checks on the BLANK specifier. */
1601 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
1602 "not allowed in Fortran 95") == FAILURE)
1605 if (open->blank->expr_type == EXPR_CONSTANT)
1607 static const char *blank[] = { "ZERO", "NULL", NULL };
1609 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
1610 open->blank->value.character.string,
1616 /* Checks on the DECIMAL specifier. */
1619 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
1620 "not allowed in Fortran 95") == FAILURE)
1623 if (open->decimal->expr_type == EXPR_CONSTANT)
1625 static const char * decimal[] = { "COMMA", "POINT", NULL };
1627 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
1628 open->decimal->value.character.string,
1634 /* Checks on the DELIM specifier. */
1637 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
1638 "not allowed in Fortran 95") == FAILURE)
1641 if (open->delim->expr_type == EXPR_CONSTANT)
1643 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
1645 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
1646 open->delim->value.character.string,
1652 /* Checks on the ENCODING specifier. */
1655 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENCODING= at %C "
1656 "not allowed in Fortran 95") == FAILURE)
1659 if (open->encoding->expr_type == EXPR_CONSTANT)
1661 /* TODO: Implement UTF-8 here. */
1662 static const char * encoding[] = { "DEFAULT", NULL };
1664 if (!compare_to_allowed_values ("ENCODING", encoding, NULL, NULL,
1665 open->encoding->value.character.string,
1671 /* Checks on the FORM specifier. */
1672 if (open->form && open->form->expr_type == EXPR_CONSTANT)
1674 static const char *form[] = { "FORMATTED", "UNFORMATTED", NULL };
1676 if (!compare_to_allowed_values ("FORM", form, NULL, NULL,
1677 open->form->value.character.string,
1682 /* Checks on the PAD specifier. */
1683 if (open->pad && open->pad->expr_type == EXPR_CONSTANT)
1685 static const char *pad[] = { "YES", "NO", NULL };
1687 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
1688 open->pad->value.character.string,
1693 /* Checks on the POSITION specifier. */
1694 if (open->position && open->position->expr_type == EXPR_CONSTANT)
1696 static const char *position[] = { "ASIS", "REWIND", "APPEND", NULL };
1698 if (!compare_to_allowed_values ("POSITION", position, NULL, NULL,
1699 open->position->value.character.string,
1704 /* Checks on the ROUND specifier. */
1707 /* When implemented, change the following to use gfc_notify_std F2003. */
1708 gfc_error ("F2003 Feature: ROUND= specifier at %C not implemented");
1711 if (open->round->expr_type == EXPR_CONSTANT)
1713 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
1714 "COMPATIBLE", "PROCESSOR_DEFINED",
1717 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
1718 open->round->value.character.string,
1724 /* Checks on the SIGN specifier. */
1727 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
1728 "not allowed in Fortran 95") == FAILURE)
1731 if (open->sign->expr_type == EXPR_CONSTANT)
1733 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
1736 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
1737 open->sign->value.character.string,
1743 #define warn_or_error(...) \
1746 gfc_warning (__VA_ARGS__); \
1749 gfc_error (__VA_ARGS__); \
1754 /* Checks on the RECL specifier. */
1755 if (open->recl && open->recl->expr_type == EXPR_CONSTANT
1756 && open->recl->ts.type == BT_INTEGER
1757 && mpz_sgn (open->recl->value.integer) != 1)
1759 warn_or_error ("RECL in OPEN statement at %C must be positive");
1762 /* Checks on the STATUS specifier. */
1763 if (open->status && open->status->expr_type == EXPR_CONSTANT)
1765 static const char *status[] = { "OLD", "NEW", "SCRATCH",
1766 "REPLACE", "UNKNOWN", NULL };
1768 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1769 open->status->value.character.string,
1773 /* F2003, 9.4.5: If the STATUS= specifier has the value NEW or REPLACE,
1774 the FILE= specifier shall appear. */
1775 if (open->file == NULL
1776 && (strncasecmp (open->status->value.character.string, "replace", 7)
1778 || strncasecmp (open->status->value.character.string, "new", 3)
1781 warn_or_error ("The STATUS specified in OPEN statement at %C is "
1782 "'%s' and no FILE specifier is present",
1783 open->status->value.character.string);
1786 /* F2003, 9.4.5: If the STATUS= specifier has the value SCRATCH,
1787 the FILE= specifier shall not appear. */
1788 if (strncasecmp (open->status->value.character.string, "scratch", 7)
1791 warn_or_error ("The STATUS specified in OPEN statement at %C "
1792 "cannot have the value SCRATCH if a FILE specifier "
1797 /* Things that are not allowed for unformatted I/O. */
1798 if (open->form && open->form->expr_type == EXPR_CONSTANT
1799 && (open->delim || open->decimal || open->encoding || open->round
1800 || open->sign || open->pad || open->blank)
1801 && strncasecmp (open->form->value.character.string,
1802 "unformatted", 11) == 0)
1804 const char *spec = (open->delim ? "DELIM "
1805 : (open->pad ? "PAD " : open->blank
1808 warn_or_error ("%s specifier at %C not allowed in OPEN statement for "
1809 "unformatted I/O", spec);
1812 if (open->recl && open->access && open->access->expr_type == EXPR_CONSTANT
1813 && strncasecmp (open->access->value.character.string, "stream", 6) == 0)
1815 warn_or_error ("RECL specifier not allowed in OPEN statement at %C for "
1820 && open->access && open->access->expr_type == EXPR_CONSTANT
1821 && !(strncasecmp (open->access->value.character.string,
1822 "sequential", 10) == 0
1823 || strncasecmp (open->access->value.character.string,
1825 || strncasecmp (open->access->value.character.string,
1828 warn_or_error ("POSITION specifier in OPEN statement at %C only allowed "
1829 "for stream or sequential ACCESS");
1832 #undef warn_or_error
1834 new_st.op = EXEC_OPEN;
1835 new_st.ext.open = open;
1839 gfc_syntax_error (ST_OPEN);
1842 gfc_free_open (open);
1847 /* Free a gfc_close structure an all its expressions. */
1850 gfc_free_close (gfc_close *close)
1855 gfc_free_expr (close->unit);
1856 gfc_free_expr (close->iomsg);
1857 gfc_free_expr (close->iostat);
1858 gfc_free_expr (close->status);
1863 /* Match elements of a CLOSE statement. */
1866 match_close_element (gfc_close *close)
1870 m = match_etag (&tag_unit, &close->unit);
1873 m = match_etag (&tag_status, &close->status);
1876 m = match_out_tag (&tag_iomsg, &close->iomsg);
1879 m = match_out_tag (&tag_iostat, &close->iostat);
1882 m = match_ltag (&tag_err, &close->err);
1890 /* Match a CLOSE statement. */
1893 gfc_match_close (void)
1899 m = gfc_match_char ('(');
1903 close = gfc_getmem (sizeof (gfc_close));
1905 m = match_close_element (close);
1907 if (m == MATCH_ERROR)
1911 m = gfc_match_expr (&close->unit);
1914 if (m == MATCH_ERROR)
1920 if (gfc_match_char (')') == MATCH_YES)
1922 if (gfc_match_char (',') != MATCH_YES)
1925 m = match_close_element (close);
1926 if (m == MATCH_ERROR)
1932 if (gfc_match_eos () == MATCH_NO)
1935 if (gfc_pure (NULL))
1937 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
1941 warn = (close->iostat || close->err) ? true : false;
1943 /* Checks on the STATUS specifier. */
1944 if (close->status && close->status->expr_type == EXPR_CONSTANT)
1946 static const char *status[] = { "KEEP", "DELETE", NULL };
1948 if (!compare_to_allowed_values ("STATUS", status, NULL, NULL,
1949 close->status->value.character.string,
1954 new_st.op = EXEC_CLOSE;
1955 new_st.ext.close = close;
1959 gfc_syntax_error (ST_CLOSE);
1962 gfc_free_close (close);
1967 /* Resolve everything in a gfc_close structure. */
1970 gfc_resolve_close (gfc_close *close)
1972 RESOLVE_TAG (&tag_unit, close->unit);
1973 RESOLVE_TAG (&tag_iomsg, close->iomsg);
1974 RESOLVE_TAG (&tag_iostat, close->iostat);
1975 RESOLVE_TAG (&tag_status, close->status);
1977 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
1984 /* Free a gfc_filepos structure. */
1987 gfc_free_filepos (gfc_filepos *fp)
1989 gfc_free_expr (fp->unit);
1990 gfc_free_expr (fp->iomsg);
1991 gfc_free_expr (fp->iostat);
1996 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
1999 match_file_element (gfc_filepos *fp)
2003 m = match_etag (&tag_unit, &fp->unit);
2006 m = match_out_tag (&tag_iomsg, &fp->iomsg);
2009 m = match_out_tag (&tag_iostat, &fp->iostat);
2012 m = match_ltag (&tag_err, &fp->err);
2020 /* Match the second half of the file-positioning statements, REWIND,
2021 BACKSPACE, ENDFILE, or the FLUSH statement. */
2024 match_filepos (gfc_statement st, gfc_exec_op op)
2029 fp = gfc_getmem (sizeof (gfc_filepos));
2031 if (gfc_match_char ('(') == MATCH_NO)
2033 m = gfc_match_expr (&fp->unit);
2034 if (m == MATCH_ERROR)
2042 m = match_file_element (fp);
2043 if (m == MATCH_ERROR)
2047 m = gfc_match_expr (&fp->unit);
2048 if (m == MATCH_ERROR)
2056 if (gfc_match_char (')') == MATCH_YES)
2058 if (gfc_match_char (',') != MATCH_YES)
2061 m = match_file_element (fp);
2062 if (m == MATCH_ERROR)
2069 if (gfc_match_eos () != MATCH_YES)
2072 if (gfc_pure (NULL))
2074 gfc_error ("%s statement not allowed in PURE procedure at %C",
2075 gfc_ascii_statement (st));
2081 new_st.ext.filepos = fp;
2085 gfc_syntax_error (st);
2088 gfc_free_filepos (fp);
2094 gfc_resolve_filepos (gfc_filepos *fp)
2096 RESOLVE_TAG (&tag_unit, fp->unit);
2097 RESOLVE_TAG (&tag_iostat, fp->iostat);
2098 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
2099 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
2106 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
2107 and the FLUSH statement. */
2110 gfc_match_endfile (void)
2112 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
2116 gfc_match_backspace (void)
2118 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
2122 gfc_match_rewind (void)
2124 return match_filepos (ST_REWIND, EXEC_REWIND);
2128 gfc_match_flush (void)
2130 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C")
2134 return match_filepos (ST_FLUSH, EXEC_FLUSH);
2137 /******************** Data Transfer Statements *********************/
2139 /* Return a default unit number. */
2142 default_unit (io_kind k)
2151 return gfc_int_expr (unit);
2155 /* Match a unit specification for a data transfer statement. */
2158 match_dt_unit (io_kind k, gfc_dt *dt)
2162 if (gfc_match_char ('*') == MATCH_YES)
2164 if (dt->io_unit != NULL)
2167 dt->io_unit = default_unit (k);
2171 if (gfc_match_expr (&e) == MATCH_YES)
2173 if (dt->io_unit != NULL)
2186 gfc_error ("Duplicate UNIT specification at %C");
2191 /* Match a format specification. */
2194 match_dt_format (gfc_dt *dt)
2198 gfc_st_label *label;
2201 where = gfc_current_locus;
2203 if (gfc_match_char ('*') == MATCH_YES)
2205 if (dt->format_expr != NULL || dt->format_label != NULL)
2208 dt->format_label = &format_asterisk;
2212 if ((m = gfc_match_st_label (&label)) == MATCH_YES)
2214 if (dt->format_expr != NULL || dt->format_label != NULL)
2216 gfc_free_st_label (label);
2220 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
2223 dt->format_label = label;
2226 else if (m == MATCH_ERROR)
2227 /* The label was zero or too large. Emit the correct diagnosis. */
2230 if (gfc_match_expr (&e) == MATCH_YES)
2232 if (dt->format_expr != NULL || dt->format_label != NULL)
2237 dt->format_expr = e;
2241 gfc_current_locus = where; /* The only case where we have to restore */
2246 gfc_error ("Duplicate format specification at %C");
2251 /* Traverse a namelist that is part of a READ statement to make sure
2252 that none of the variables in the namelist are INTENT(IN). Returns
2253 nonzero if we find such a variable. */
2256 check_namelist (gfc_symbol *sym)
2260 for (p = sym->namelist; p; p = p->next)
2261 if (p->sym->attr.intent == INTENT_IN)
2263 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
2264 p->sym->name, sym->name);
2272 /* Match a single data transfer element. */
2275 match_dt_element (io_kind k, gfc_dt *dt)
2277 char name[GFC_MAX_SYMBOL_LEN + 1];
2281 if (gfc_match (" unit =") == MATCH_YES)
2283 m = match_dt_unit (k, dt);
2288 if (gfc_match (" fmt =") == MATCH_YES)
2290 m = match_dt_format (dt);
2295 if (gfc_match (" nml = %n", name) == MATCH_YES)
2297 if (dt->namelist != NULL)
2299 gfc_error ("Duplicate NML specification at %C");
2303 if (gfc_find_symbol (name, NULL, 1, &sym))
2306 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
2308 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
2309 sym != NULL ? sym->name : name);
2314 if (k == M_READ && check_namelist (sym))
2320 m = match_etag (&tag_e_async, &dt->asynchronous);
2323 m = match_etag (&tag_e_blank, &dt->blank);
2326 m = match_etag (&tag_e_delim, &dt->delim);
2329 m = match_etag (&tag_e_pad, &dt->pad);
2332 m = match_etag (&tag_e_sign, &dt->sign);
2335 m = match_etag (&tag_e_round, &dt->round);
2338 m = match_out_tag (&tag_id, &dt->id);
2341 m = match_etag (&tag_e_decimal, &dt->decimal);
2344 m = match_etag (&tag_rec, &dt->rec);
2347 m = match_etag (&tag_spos, &dt->rec);
2350 m = match_out_tag (&tag_iomsg, &dt->iomsg);
2353 m = match_out_tag (&tag_iostat, &dt->iostat);
2356 m = match_ltag (&tag_err, &dt->err);
2358 dt->err_where = gfc_current_locus;
2361 m = match_etag (&tag_advance, &dt->advance);
2364 m = match_out_tag (&tag_size, &dt->size);
2368 m = match_ltag (&tag_end, &dt->end);
2373 gfc_error ("END tag at %C not allowed in output statement");
2376 dt->end_where = gfc_current_locus;
2381 m = match_ltag (&tag_eor, &dt->eor);
2383 dt->eor_where = gfc_current_locus;
2391 /* Free a data transfer structure and everything below it. */
2394 gfc_free_dt (gfc_dt *dt)
2399 gfc_free_expr (dt->io_unit);
2400 gfc_free_expr (dt->format_expr);
2401 gfc_free_expr (dt->rec);
2402 gfc_free_expr (dt->advance);
2403 gfc_free_expr (dt->iomsg);
2404 gfc_free_expr (dt->iostat);
2405 gfc_free_expr (dt->size);
2406 gfc_free_expr (dt->pad);
2407 gfc_free_expr (dt->delim);
2408 gfc_free_expr (dt->sign);
2409 gfc_free_expr (dt->round);
2410 gfc_free_expr (dt->blank);
2411 gfc_free_expr (dt->decimal);
2412 gfc_free_expr (dt->extra_comma);
2417 /* Resolve everything in a gfc_dt structure. */
2420 gfc_resolve_dt (gfc_dt *dt)
2424 RESOLVE_TAG (&tag_format, dt->format_expr);
2425 RESOLVE_TAG (&tag_rec, dt->rec);
2426 RESOLVE_TAG (&tag_spos, dt->rec);
2427 RESOLVE_TAG (&tag_advance, dt->advance);
2428 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
2429 RESOLVE_TAG (&tag_iostat, dt->iostat);
2430 RESOLVE_TAG (&tag_size, dt->size);
2431 RESOLVE_TAG (&tag_e_pad, dt->pad);
2432 RESOLVE_TAG (&tag_e_delim, dt->delim);
2433 RESOLVE_TAG (&tag_e_sign, dt->sign);
2434 RESOLVE_TAG (&tag_e_round, dt->round);
2435 RESOLVE_TAG (&tag_e_blank, dt->blank);
2436 RESOLVE_TAG (&tag_e_decimal, dt->decimal);
2439 if (gfc_resolve_expr (e) == SUCCESS
2440 && (e->ts.type != BT_INTEGER
2441 && (e->ts.type != BT_CHARACTER || e->expr_type != EXPR_VARIABLE)))
2443 /* If there is no extra comma signifying the "format" form of the IO
2444 statement, then this must be an error. */
2445 if (!dt->extra_comma)
2447 gfc_error ("UNIT specification at %L must be an INTEGER expression "
2448 "or a CHARACTER variable", &e->where);
2453 /* At this point, we have an extra comma. If io_unit has arrived as
2454 type chracter, we assume its really the "format" form of the I/O
2455 statement. We set the io_unit to the default unit and format to
2456 the chracter expression. See F95 Standard section 9.4. */
2458 k = dt->extra_comma->value.iokind;
2459 if (e->ts.type == BT_CHARACTER && (k == M_READ || k == M_PRINT))
2461 dt->format_expr = dt->io_unit;
2462 dt->io_unit = default_unit (k);
2464 /* Free this pointer now so that a warning/error is not triggered
2465 below for the "Extension". */
2466 gfc_free_expr (dt->extra_comma);
2467 dt->extra_comma = NULL;
2472 gfc_error ("Invalid form of WRITE statement at %L, UNIT required",
2473 &dt->extra_comma->where);
2479 if (e->ts.type == BT_CHARACTER)
2481 if (gfc_has_vector_index (e))
2483 gfc_error ("Internal unit with vector subscript at %L", &e->where);
2488 if (e->rank && e->ts.type != BT_CHARACTER)
2490 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
2495 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before i/o "
2496 "item list at %L", &dt->extra_comma->where) == FAILURE)
2501 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
2503 if (dt->err->defined == ST_LABEL_UNKNOWN)
2505 gfc_error ("ERR tag label %d at %L not defined",
2506 dt->err->value, &dt->err_where);
2513 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
2515 if (dt->end->defined == ST_LABEL_UNKNOWN)
2517 gfc_error ("END tag label %d at %L not defined",
2518 dt->end->value, &dt->end_where);
2525 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
2527 if (dt->eor->defined == ST_LABEL_UNKNOWN)
2529 gfc_error ("EOR tag label %d at %L not defined",
2530 dt->eor->value, &dt->eor_where);
2535 /* Check the format label actually exists. */
2536 if (dt->format_label && dt->format_label != &format_asterisk
2537 && dt->format_label->defined == ST_LABEL_UNKNOWN)
2539 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
2540 &dt->format_label->where);
2547 /* Given an io_kind, return its name. */
2550 io_kind_name (io_kind k)
2569 gfc_internal_error ("io_kind_name(): bad I/O-kind");
2576 /* Match an IO iteration statement of the form:
2578 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
2580 which is equivalent to a single IO element. This function is
2581 mutually recursive with match_io_element(). */
2583 static match match_io_element (io_kind, gfc_code **);
2586 match_io_iterator (io_kind k, gfc_code **result)
2588 gfc_code *head, *tail, *new;
2596 old_loc = gfc_current_locus;
2598 if (gfc_match_char ('(') != MATCH_YES)
2601 m = match_io_element (k, &head);
2604 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
2610 /* Can't be anything but an IO iterator. Build a list. */
2611 iter = gfc_get_iterator ();
2615 m = gfc_match_iterator (iter, 0);
2616 if (m == MATCH_ERROR)
2620 gfc_check_do_variable (iter->var->symtree);
2624 m = match_io_element (k, &new);
2625 if (m == MATCH_ERROR)
2634 tail = gfc_append_code (tail, new);
2636 if (gfc_match_char (',') != MATCH_YES)
2645 if (gfc_match_char (')') != MATCH_YES)
2648 new = gfc_get_code ();
2650 new->ext.iterator = iter;
2652 new->block = gfc_get_code ();
2653 new->block->op = EXEC_DO;
2654 new->block->next = head;
2660 gfc_error ("Syntax error in I/O iterator at %C");
2664 gfc_free_iterator (iter, 1);
2665 gfc_free_statements (head);
2666 gfc_current_locus = old_loc;
2671 /* Match a single element of an IO list, which is either a single
2672 expression or an IO Iterator. */
2675 match_io_element (io_kind k, gfc_code **cpp)
2683 m = match_io_iterator (k, cpp);
2689 m = gfc_match_variable (&expr, 0);
2691 gfc_error ("Expected variable in READ statement at %C");
2695 m = gfc_match_expr (&expr);
2697 gfc_error ("Expected expression in %s statement at %C",
2705 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2707 gfc_error ("Variable '%s' in input list at %C cannot be "
2708 "INTENT(IN)", expr->symtree->n.sym->name);
2713 && gfc_impure_variable (expr->symtree->n.sym)
2714 && current_dt->io_unit->ts.type == BT_CHARACTER)
2716 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2717 expr->symtree->n.sym->name);
2721 if (gfc_check_do_variable (expr->symtree))
2727 if (current_dt->io_unit->ts.type == BT_CHARACTER
2729 && current_dt->io_unit->expr_type == EXPR_VARIABLE
2730 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
2732 gfc_error ("Cannot write to internal file unit '%s' at %C "
2733 "inside a PURE procedure",
2734 current_dt->io_unit->symtree->n.sym->name);
2746 gfc_free_expr (expr);
2750 cp = gfc_get_code ();
2751 cp->op = EXEC_TRANSFER;
2759 /* Match an I/O list, building gfc_code structures as we go. */
2762 match_io_list (io_kind k, gfc_code **head_p)
2764 gfc_code *head, *tail, *new;
2767 *head_p = head = tail = NULL;
2768 if (gfc_match_eos () == MATCH_YES)
2773 m = match_io_element (k, &new);
2774 if (m == MATCH_ERROR)
2779 tail = gfc_append_code (tail, new);
2783 if (gfc_match_eos () == MATCH_YES)
2785 if (gfc_match_char (',') != MATCH_YES)
2793 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2796 gfc_free_statements (head);
2801 /* Attach the data transfer end node. */
2804 terminate_io (gfc_code *io_code)
2808 if (io_code == NULL)
2809 io_code = new_st.block;
2811 c = gfc_get_code ();
2812 c->op = EXEC_DT_END;
2814 /* Point to structure that is already there */
2815 c->ext.dt = new_st.ext.dt;
2816 gfc_append_code (io_code, c);
2820 /* Check the constraints for a data transfer statement. The majority of the
2821 constraints appearing in 9.4 of the standard appear here. Some are handled
2822 in resolve_tag and others in gfc_resolve_dt. */
2825 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code *io_code,
2828 #define io_constraint(condition,msg,arg)\
2831 gfc_error(msg,arg);\
2837 gfc_symbol *sym = NULL;
2838 bool warn, unformatted;
2840 warn = (dt->err || dt->iostat) ? true : false;
2841 unformatted = dt->format_expr == NULL && dt->format_label == NULL
2842 && dt->namelist == NULL;
2847 if (expr && expr->expr_type == EXPR_VARIABLE
2848 && expr->ts.type == BT_CHARACTER)
2850 sym = expr->symtree->n.sym;
2852 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
2853 "Internal file at %L must not be INTENT(IN)",
2856 io_constraint (gfc_has_vector_index (dt->io_unit),
2857 "Internal file incompatible with vector subscript at %L",
2860 io_constraint (dt->rec != NULL,
2861 "REC tag at %L is incompatible with internal file",
2864 io_constraint (unformatted,
2865 "Unformatted I/O not allowed with internal unit at %L",
2866 &dt->io_unit->where);
2868 io_constraint (dt->asynchronous != NULL,
2869 "ASYNCHRONOUS tag at %L not allowed with internal file",
2870 &dt->asynchronous->where);
2872 if (dt->namelist != NULL)
2874 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Internal file "
2875 "at %L with namelist", &expr->where)
2880 io_constraint (dt->advance != NULL,
2881 "ADVANCE tag at %L is incompatible with internal file",
2882 &dt->advance->where);
2885 if (expr && expr->ts.type != BT_CHARACTER)
2888 io_constraint (gfc_pure (NULL) && (k == M_READ || k == M_WRITE),
2889 "IO UNIT in %s statement at %C must be "
2890 "an internal file in a PURE procedure",
2896 io_constraint (dt->end, "END tag not allowed with output at %L",
2899 io_constraint (dt->eor, "EOR tag not allowed with output at %L",
2902 io_constraint (dt->blank, "BLANK= specifier not allowed with output at %L",
2905 io_constraint (dt->pad, "PAD= specifier not allowed with output at %L",
2908 io_constraint (dt->size, "SIZE= specifier not allowed with output at %L",
2913 io_constraint (dt->size && dt->advance == NULL,
2914 "SIZE tag at %L requires an ADVANCE tag",
2917 io_constraint (dt->eor && dt->advance == NULL,
2918 "EOR tag at %L requires an ADVANCE tag",
2922 if (dt->asynchronous)
2924 static const char * asynchronous[] = { "YES", "NO", NULL };
2926 if (dt->asynchronous->expr_type != EXPR_CONSTANT)
2928 gfc_error ("ASYNCHRONOUS= specifier at %L must be an initialization "
2929 "expression", &dt->asynchronous->where);
2933 if (!compare_to_allowed_values
2934 ("ASYNCHRONOUS", asynchronous, NULL, NULL,
2935 dt->asynchronous->value.character.string,
2936 io_kind_name (k), warn))
2942 io_constraint (!dt->asynchronous
2943 || strcmp (dt->asynchronous->value.character.string,
2945 "ID= specifier at %L must be with ASYNCHRONOUS='yes' "
2946 "specifier", &dt->id->where);
2951 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DECIMAL= at %C "
2952 "not allowed in Fortran 95") == FAILURE)
2955 if (dt->decimal->expr_type == EXPR_CONSTANT)
2957 static const char * decimal[] = { "COMMA", "POINT", NULL };
2959 if (!compare_to_allowed_values ("DECIMAL", decimal, NULL, NULL,
2960 dt->decimal->value.character.string,
2961 io_kind_name (k), warn))
2964 io_constraint (unformatted,
2965 "the DECIMAL= specifier at %L must be with an "
2966 "explicit format expression", &dt->decimal->where);
2972 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BLANK= at %C "
2973 "not allowed in Fortran 95") == FAILURE)
2976 if (dt->blank->expr_type == EXPR_CONSTANT)
2978 static const char * blank[] = { "NULL", "ZERO", NULL };
2980 if (!compare_to_allowed_values ("BLANK", blank, NULL, NULL,
2981 dt->blank->value.character.string,
2982 io_kind_name (k), warn))
2985 io_constraint (unformatted,
2986 "the BLANK= specifier at %L must be with an "
2987 "explicit format expression", &dt->blank->where);
2993 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PAD= at %C "
2994 "not allowed in Fortran 95") == FAILURE)
2997 if (dt->pad->expr_type == EXPR_CONSTANT)
2999 static const char * pad[] = { "YES", "NO", NULL };
3001 if (!compare_to_allowed_values ("PAD", pad, NULL, NULL,
3002 dt->pad->value.character.string,
3003 io_kind_name (k), warn))
3006 io_constraint (unformatted,
3007 "the PAD= specifier at %L must be with an "
3008 "explicit format expression", &dt->pad->where);
3014 /* When implemented, change the following to use gfc_notify_std F2003.
3015 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ROUND= at %C "
3016 "not allowed in Fortran 95") == FAILURE)
3017 return MATCH_ERROR; */
3018 gfc_error ("F2003 Feature: ROUND= specifier at %C not implemented");
3021 if (dt->round->expr_type == EXPR_CONSTANT)
3023 static const char * round[] = { "UP", "DOWN", "ZERO", "NEAREST",
3024 "COMPATIBLE", "PROCESSOR_DEFINED",
3027 if (!compare_to_allowed_values ("ROUND", round, NULL, NULL,
3028 dt->round->value.character.string,
3029 io_kind_name (k), warn))
3036 /* When implemented, change the following to use gfc_notify_std F2003.
3037 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SIGN= at %C "
3038 "not allowed in Fortran 95") == FAILURE)
3039 return MATCH_ERROR; */
3040 if (dt->sign->expr_type == EXPR_CONSTANT)
3042 static const char * sign[] = { "PLUS", "SUPPRESS", "PROCESSOR_DEFINED",
3045 if (!compare_to_allowed_values ("SIGN", sign, NULL, NULL,
3046 dt->sign->value.character.string,
3047 io_kind_name (k), warn))
3050 io_constraint (unformatted,
3051 "SIGN= specifier at %L must be with an "
3052 "explicit format expression", &dt->sign->where);
3054 io_constraint (k == M_READ,
3055 "SIGN= specifier at %L not allowed in a "
3056 "READ statement", &dt->sign->where);
3062 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: DELIM= at %C "
3063 "not allowed in Fortran 95") == FAILURE)
3066 if (dt->delim->expr_type == EXPR_CONSTANT)
3068 static const char *delim[] = { "APOSTROPHE", "QUOTE", "NONE", NULL };
3070 if (!compare_to_allowed_values ("DELIM", delim, NULL, NULL,
3071 dt->delim->value.character.string,
3072 io_kind_name (k), warn))
3075 io_constraint (k == M_READ,
3076 "DELIM= specifier at %L not allowed in a "
3077 "READ statement", &dt->delim->where);
3079 io_constraint (dt->format_label != &format_asterisk
3080 && dt->namelist == NULL,
3081 "DELIM= specifier at %L must have FMT=*",
3084 io_constraint (unformatted && dt->namelist == NULL,
3085 "DELIM= specifier at %L must be with FMT=* or "
3086 "NML= specifier ", &dt->delim->where);
3092 io_constraint (io_code && dt->namelist,
3093 "NAMELIST cannot be followed by IO-list at %L",
3096 io_constraint (dt->format_expr,
3097 "IO spec-list cannot contain both NAMELIST group name "
3098 "and format specification at %L.",
3099 &dt->format_expr->where);
3101 io_constraint (dt->format_label,
3102 "IO spec-list cannot contain both NAMELIST group name "
3103 "and format label at %L", spec_end);
3105 io_constraint (dt->rec,
3106 "NAMELIST IO is not allowed with a REC= specifier "
3107 "at %L.", &dt->rec->where);
3109 io_constraint (dt->advance,
3110 "NAMELIST IO is not allowed with a ADVANCE= specifier "
3111 "at %L.", &dt->advance->where);
3116 io_constraint (dt->end,
3117 "An END tag is not allowed with a "
3118 "REC= specifier at %L.", &dt->end_where);
3120 io_constraint (dt->format_label == &format_asterisk,
3121 "FMT=* is not allowed with a REC= specifier "
3122 "at %L.", spec_end);
3127 int not_yes, not_no;
3130 io_constraint (dt->format_label == &format_asterisk,
3131 "List directed format(*) is not allowed with a "
3132 "ADVANCE= specifier at %L.", &expr->where);
3134 io_constraint (unformatted,
3135 "the ADVANCE= specifier at %L must appear with an "
3136 "explicit format expression", &expr->where);
3138 if (expr->expr_type == EXPR_CONSTANT && expr->ts.type == BT_CHARACTER)
3140 const char * advance = expr->value.character.string;
3141 not_no = strcasecmp (advance, "no") != 0;
3142 not_yes = strcasecmp (advance, "yes") != 0;
3150 io_constraint (not_no && not_yes,
3151 "ADVANCE= specifier at %L must have value = "
3152 "YES or NO.", &expr->where);
3154 io_constraint (dt->size && not_no && k == M_READ,
3155 "SIZE tag at %L requires an ADVANCE = 'NO'",
3158 io_constraint (dt->eor && not_no && k == M_READ,
3159 "EOR tag at %L requires an ADVANCE = 'NO'",
3163 expr = dt->format_expr;
3164 if (gfc_simplify_expr (expr, 0) == FAILURE
3165 || check_format_string (expr, k == M_READ) == FAILURE)
3170 #undef io_constraint
3173 /* Match a READ, WRITE or PRINT statement. */
3176 match_io (io_kind k)
3178 char name[GFC_MAX_SYMBOL_LEN + 1];
3187 where = gfc_current_locus;
3189 current_dt = dt = gfc_getmem (sizeof (gfc_dt));
3190 m = gfc_match_char ('(');
3193 where = gfc_current_locus;
3196 else if (k == M_PRINT)
3198 /* Treat the non-standard case of PRINT namelist. */
3199 if ((gfc_current_form == FORM_FIXED || gfc_peek_ascii_char () == ' ')
3200 && gfc_match_name (name) == MATCH_YES)
3202 gfc_find_symbol (name, NULL, 1, &sym);
3203 if (sym && sym->attr.flavor == FL_NAMELIST)
3205 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
3206 "%C is an extension") == FAILURE)
3212 dt->io_unit = default_unit (k);
3217 gfc_current_locus = where;
3221 if (gfc_current_form == FORM_FREE)
3223 char c = gfc_peek_ascii_char ();
3224 if (c != ' ' && c != '*' && c != '\'' && c != '"')
3231 m = match_dt_format (dt);
3232 if (m == MATCH_ERROR)
3238 dt->io_unit = default_unit (k);
3243 /* Before issuing an error for a malformed 'print (1,*)' type of
3244 error, check for a default-char-expr of the form ('(I0)'). */
3245 if (k == M_PRINT && m == MATCH_YES)
3247 /* Reset current locus to get the initial '(' in an expression. */
3248 gfc_current_locus = where;
3249 dt->format_expr = NULL;
3250 m = match_dt_format (dt);
3252 if (m == MATCH_ERROR)
3254 if (m == MATCH_NO || dt->format_expr == NULL)
3258 dt->io_unit = default_unit (k);
3263 /* Match a control list */
3264 if (match_dt_element (k, dt) == MATCH_YES)
3266 if (match_dt_unit (k, dt) != MATCH_YES)
3269 if (gfc_match_char (')') == MATCH_YES)
3271 if (gfc_match_char (',') != MATCH_YES)
3274 m = match_dt_element (k, dt);
3277 if (m == MATCH_ERROR)
3280 m = match_dt_format (dt);
3283 if (m == MATCH_ERROR)
3286 where = gfc_current_locus;
3288 m = gfc_match_name (name);
3291 gfc_find_symbol (name, NULL, 1, &sym);
3292 if (sym && sym->attr.flavor == FL_NAMELIST)
3295 if (k == M_READ && check_namelist (sym))
3304 gfc_current_locus = where;
3306 goto loop; /* No matches, try regular elements */
3309 if (gfc_match_char (')') == MATCH_YES)
3311 if (gfc_match_char (',') != MATCH_YES)
3317 m = match_dt_element (k, dt);
3320 if (m == MATCH_ERROR)
3323 if (gfc_match_char (')') == MATCH_YES)
3325 if (gfc_match_char (',') != MATCH_YES)
3331 /* Used in check_io_constraints, where no locus is available. */
3332 spec_end = gfc_current_locus;
3334 /* Optional leading comma (non-standard). We use a gfc_expr structure here
3335 to save the locus. This is used later when resolving transfer statements
3336 that might have a format expression without unit number. */
3337 if (!comma_flag && gfc_match_char (',') == MATCH_YES)
3339 dt->extra_comma = gfc_get_expr ();
3341 /* Set the types to something compatible with iokind. This is needed to
3342 get through gfc_free_expr later since iokind really has no Basic Type,
3344 dt->extra_comma->expr_type = EXPR_CONSTANT;
3345 dt->extra_comma->ts.type = BT_LOGICAL;
3347 /* Save the iokind and locus for later use in resolution. */
3348 dt->extra_comma->value.iokind = k;
3349 dt->extra_comma->where = gfc_current_locus;
3353 if (gfc_match_eos () != MATCH_YES)
3355 if (comma_flag && gfc_match_char (',') != MATCH_YES)
3357 gfc_error ("Expected comma in I/O list at %C");
3362 m = match_io_list (k, &io_code);
3363 if (m == MATCH_ERROR)
3369 /* A full IO statement has been matched. Check the constraints. spec_end is
3370 supplied for cases where no locus is supplied. */
3371 m = check_io_constraints (k, dt, io_code, &spec_end);
3373 if (m == MATCH_ERROR)
3376 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
3378 new_st.block = gfc_get_code ();
3379 new_st.block->op = new_st.op;
3380 new_st.block->next = io_code;
3382 terminate_io (io_code);
3387 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
3397 gfc_match_read (void)
3399 return match_io (M_READ);
3404 gfc_match_write (void)
3406 return match_io (M_WRITE);
3411 gfc_match_print (void)
3415 m = match_io (M_PRINT);
3419 if (gfc_pure (NULL))
3421 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
3429 /* Free a gfc_inquire structure. */
3432 gfc_free_inquire (gfc_inquire *inquire)
3435 if (inquire == NULL)
3438 gfc_free_expr (inquire->unit);
3439 gfc_free_expr (inquire->file);
3440 gfc_free_expr (inquire->iomsg);
3441 gfc_free_expr (inquire->iostat);
3442 gfc_free_expr (inquire->exist);
3443 gfc_free_expr (inquire->opened);
3444 gfc_free_expr (inquire->number);
3445 gfc_free_expr (inquire->named);
3446 gfc_free_expr (inquire->name);
3447 gfc_free_expr (inquire->access);
3448 gfc_free_expr (inquire->sequential);
3449 gfc_free_expr (inquire->direct);
3450 gfc_free_expr (inquire->form);
3451 gfc_free_expr (inquire->formatted);
3452 gfc_free_expr (inquire->unformatted);
3453 gfc_free_expr (inquire->recl);
3454 gfc_free_expr (inquire->nextrec);
3455 gfc_free_expr (inquire->blank);
3456 gfc_free_expr (inquire->position);
3457 gfc_free_expr (inquire->action);
3458 gfc_free_expr (inquire->read);
3459 gfc_free_expr (inquire->write);
3460 gfc_free_expr (inquire->readwrite);
3461 gfc_free_expr (inquire->delim);
3462 gfc_free_expr (inquire->encoding);
3463 gfc_free_expr (inquire->pad);
3464 gfc_free_expr (inquire->iolength);
3465 gfc_free_expr (inquire->convert);
3466 gfc_free_expr (inquire->strm_pos);
3467 gfc_free_expr (inquire->asynchronous);
3468 gfc_free_expr (inquire->pending);
3469 gfc_free_expr (inquire->id);
3470 gfc_free_expr (inquire->sign);
3471 gfc_free_expr (inquire->round);
3476 /* Match an element of an INQUIRE statement. */
3478 #define RETM if (m != MATCH_NO) return m;
3481 match_inquire_element (gfc_inquire *inquire)
3485 m = match_etag (&tag_unit, &inquire->unit);
3486 RETM m = match_etag (&tag_file, &inquire->file);
3487 RETM m = match_ltag (&tag_err, &inquire->err);
3488 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
3489 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
3490 RETM m = match_vtag (&tag_exist, &inquire->exist);
3491 RETM m = match_vtag (&tag_opened, &inquire->opened);
3492 RETM m = match_vtag (&tag_named, &inquire->named);
3493 RETM m = match_vtag (&tag_name, &inquire->name);
3494 RETM m = match_out_tag (&tag_number, &inquire->number);
3495 RETM m = match_vtag (&tag_s_access, &inquire->access);
3496 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
3497 RETM m = match_vtag (&tag_direct, &inquire->direct);
3498 RETM m = match_vtag (&tag_s_form, &inquire->form);
3499 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
3500 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
3501 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
3502 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
3503 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3504 RETM m = match_vtag (&tag_s_position, &inquire->position);
3505 RETM m = match_vtag (&tag_s_action, &inquire->action);
3506 RETM m = match_vtag (&tag_read, &inquire->read);
3507 RETM m = match_vtag (&tag_write, &inquire->write);
3508 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
3509 RETM m = match_vtag (&tag_s_async, &inquire->asynchronous);
3510 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
3511 RETM m = match_vtag (&tag_s_decimal, &inquire->decimal);
3512 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
3513 RETM m = match_vtag (&tag_s_encoding, &inquire->encoding);
3514 RETM m = match_vtag (&tag_s_round, &inquire->round);
3515 RETM m = match_vtag (&tag_s_sign, &inquire->sign);
3516 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
3517 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
3518 RETM m = match_vtag (&tag_convert, &inquire->convert);
3519 RETM m = match_out_tag (&tag_strm_out, &inquire->strm_pos);
3520 RETM m = match_vtag (&tag_pending, &inquire->pending);
3521 RETM m = match_vtag (&tag_id, &inquire->id);
3522 RETM return MATCH_NO;
3529 gfc_match_inquire (void)
3531 gfc_inquire *inquire;
3536 m = gfc_match_char ('(');
3540 inquire = gfc_getmem (sizeof (gfc_inquire));
3542 loc = gfc_current_locus;
3544 m = match_inquire_element (inquire);
3545 if (m == MATCH_ERROR)
3549 m = gfc_match_expr (&inquire->unit);
3550 if (m == MATCH_ERROR)
3556 /* See if we have the IOLENGTH form of the inquire statement. */
3557 if (inquire->iolength != NULL)
3559 if (gfc_match_char (')') != MATCH_YES)
3562 m = match_io_list (M_INQUIRE, &code);
3563 if (m == MATCH_ERROR)
3568 new_st.op = EXEC_IOLENGTH;
3569 new_st.expr = inquire->iolength;
3570 new_st.ext.inquire = inquire;
3572 if (gfc_pure (NULL))
3574 gfc_free_statements (code);
3575 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3579 new_st.block = gfc_get_code ();
3580 new_st.block->op = EXEC_IOLENGTH;
3581 terminate_io (code);
3582 new_st.block->next = code;
3586 /* At this point, we have the non-IOLENGTH inquire statement. */
3589 if (gfc_match_char (')') == MATCH_YES)
3591 if (gfc_match_char (',') != MATCH_YES)
3594 m = match_inquire_element (inquire);
3595 if (m == MATCH_ERROR)
3600 if (inquire->iolength != NULL)
3602 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
3607 if (gfc_match_eos () != MATCH_YES)
3610 if (inquire->unit != NULL && inquire->file != NULL)
3612 gfc_error ("INQUIRE statement at %L cannot contain both FILE and "
3613 "UNIT specifiers", &loc);
3617 if (inquire->unit == NULL && inquire->file == NULL)
3619 gfc_error ("INQUIRE statement at %L requires either FILE or "
3620 "UNIT specifier", &loc);
3624 if (gfc_pure (NULL))
3626 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
3630 if (inquire->id != NULL && inquire->pending == NULL)
3632 gfc_error ("INQUIRE statement at %L requires a PENDING= specifier with "
3633 "the ID= specifier", &loc);
3637 new_st.op = EXEC_INQUIRE;
3638 new_st.ext.inquire = inquire;
3642 gfc_syntax_error (ST_INQUIRE);
3645 gfc_free_inquire (inquire);
3650 /* Resolve everything in a gfc_inquire structure. */
3653 gfc_resolve_inquire (gfc_inquire *inquire)
3655 RESOLVE_TAG (&tag_unit, inquire->unit);
3656 RESOLVE_TAG (&tag_file, inquire->file);
3657 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
3658 RESOLVE_TAG (&tag_iostat, inquire->iostat);
3659 RESOLVE_TAG (&tag_exist, inquire->exist);
3660 RESOLVE_TAG (&tag_opened, inquire->opened);
3661 RESOLVE_TAG (&tag_number, inquire->number);
3662 RESOLVE_TAG (&tag_named, inquire->named);
3663 RESOLVE_TAG (&tag_name, inquire->name);
3664 RESOLVE_TAG (&tag_s_access, inquire->access);
3665 RESOLVE_TAG (&tag_sequential, inquire->sequential);
3666 RESOLVE_TAG (&tag_direct, inquire->direct);
3667 RESOLVE_TAG (&tag_s_form, inquire->form);
3668 RESOLVE_TAG (&tag_formatted, inquire->formatted);
3669 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
3670 RESOLVE_TAG (&tag_s_recl, inquire->recl);
3671 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
3672 RESOLVE_TAG (&tag_s_blank, inquire->blank);
3673 RESOLVE_TAG (&tag_s_position, inquire->position);
3674 RESOLVE_TAG (&tag_s_action, inquire->action);
3675 RESOLVE_TAG (&tag_read, inquire->read);
3676 RESOLVE_TAG (&tag_write, inquire->write);
3677 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
3678 RESOLVE_TAG (&tag_s_delim, inquire->delim);
3679 RESOLVE_TAG (&tag_s_pad, inquire->pad);
3680 RESOLVE_TAG (&tag_s_encoding, inquire->encoding);
3681 RESOLVE_TAG (&tag_s_round, inquire->round);
3682 RESOLVE_TAG (&tag_iolength, inquire->iolength);
3683 RESOLVE_TAG (&tag_convert, inquire->convert);
3684 RESOLVE_TAG (&tag_strm_out, inquire->strm_pos);
3685 RESOLVE_TAG (&tag_s_async, inquire->asynchronous);
3686 RESOLVE_TAG (&tag_s_sign, inquire->sign);
3687 RESOLVE_TAG (&tag_s_round, inquire->round);
3688 RESOLVE_TAG (&tag_pending, inquire->pending);
3689 RESOLVE_TAG (&tag_id, inquire->id);
3691 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)
3699 gfc_free_wait (gfc_wait *wait)
3704 gfc_free_expr (wait->unit);
3705 gfc_free_expr (wait->iostat);
3706 gfc_free_expr (wait->iomsg);
3707 gfc_free_expr (wait->id);
3712 gfc_resolve_wait (gfc_wait *wait)
3714 RESOLVE_TAG (&tag_unit, wait->unit);
3715 RESOLVE_TAG (&tag_iomsg, wait->iomsg);
3716 RESOLVE_TAG (&tag_iostat, wait->iostat);
3717 RESOLVE_TAG (&tag_id, wait->id);
3719 if (gfc_reference_st_label (wait->err, ST_LABEL_TARGET) == FAILURE)
3722 if (gfc_reference_st_label (wait->end, ST_LABEL_TARGET) == FAILURE)
3728 /* Match an element of a WAIT statement. */
3730 #define RETM if (m != MATCH_NO) return m;
3733 match_wait_element (gfc_wait *wait)
3737 m = match_etag (&tag_unit, &wait->unit);
3738 RETM m = match_ltag (&tag_err, &wait->err);
3739 RETM m = match_ltag (&tag_end, &wait->eor);
3740 RETM m = match_ltag (&tag_eor, &wait->end);
3741 RETM m = match_out_tag (&tag_iomsg, &wait->iomsg);
3742 RETM m = match_out_tag (&tag_iostat, &wait->iostat);
3743 RETM m = match_etag (&tag_id, &wait->id);
3744 RETM return MATCH_NO;
3751 gfc_match_wait (void)
3757 m = gfc_match_char ('(');
3761 wait = gfc_getmem (sizeof (gfc_wait));
3763 loc = gfc_current_locus;
3765 m = match_wait_element (wait);
3766 if (m == MATCH_ERROR)
3770 m = gfc_match_expr (&wait->unit);
3771 if (m == MATCH_ERROR)
3779 if (gfc_match_char (')') == MATCH_YES)
3781 if (gfc_match_char (',') != MATCH_YES)
3784 m = match_wait_element (wait);
3785 if (m == MATCH_ERROR)
3791 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: WAIT at %C "
3792 "not allowed in Fortran 95") == FAILURE)
3795 if (gfc_pure (NULL))
3797 gfc_error ("WAIT statement not allowed in PURE procedure at %C");
3801 new_st.op = EXEC_WAIT;
3802 new_st.ext.wait = wait;
3807 gfc_syntax_error (ST_WAIT);
3810 gfc_free_wait (wait);