1 /* Deal with I/O statements & related stuff.
2 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
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 2, 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 COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
30 gfc_st_label format_asterisk =
31 {0, NULL, NULL, -1, ST_LABEL_FORMAT, ST_LABEL_FORMAT, NULL,
36 const char *name, *spec;
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_unit = {"UNIT", " unit = %e", BT_INTEGER},
53 tag_advance = {"ADVANCE", " advance = %e", BT_CHARACTER},
54 tag_rec = {"REC", " rec = %e", BT_INTEGER},
55 tag_format = {"FORMAT", NULL, BT_CHARACTER},
56 tag_iomsg = {"IOMSG", " iomsg = %e", BT_CHARACTER},
57 tag_iostat = {"IOSTAT", " iostat = %v", BT_INTEGER},
58 tag_size = {"SIZE", " size = %v", BT_INTEGER},
59 tag_exist = {"EXIST", " exist = %v", BT_LOGICAL},
60 tag_opened = {"OPENED", " opened = %v", BT_LOGICAL},
61 tag_named = {"NAMED", " named = %v", BT_LOGICAL},
62 tag_name = {"NAME", " name = %v", BT_CHARACTER},
63 tag_number = {"NUMBER", " number = %v", BT_INTEGER},
64 tag_s_access = {"ACCESS", " access = %v", BT_CHARACTER},
65 tag_sequential = {"SEQUENTIAL", " sequential = %v", BT_CHARACTER},
66 tag_direct = {"DIRECT", " direct = %v", BT_CHARACTER},
67 tag_s_form = {"FORM", " form = %v", BT_CHARACTER},
68 tag_formatted = {"FORMATTED", " formatted = %v", BT_CHARACTER},
69 tag_unformatted = {"UNFORMATTED", " unformatted = %v", BT_CHARACTER},
70 tag_s_recl = {"RECL", " recl = %v", BT_INTEGER},
71 tag_nextrec = {"NEXTREC", " nextrec = %v", BT_INTEGER},
72 tag_s_blank = {"BLANK", " blank = %v", BT_CHARACTER},
73 tag_s_position = {"POSITION", " position = %v", BT_CHARACTER},
74 tag_s_action = {"ACTION", " action = %v", BT_CHARACTER},
75 tag_read = {"READ", " read = %v", BT_CHARACTER},
76 tag_write = {"WRITE", " write = %v", BT_CHARACTER},
77 tag_readwrite = {"READWRITE", " readwrite = %v", BT_CHARACTER},
78 tag_s_delim = {"DELIM", " delim = %v", BT_CHARACTER},
79 tag_s_pad = {"PAD", " pad = %v", BT_CHARACTER},
80 tag_iolength = {"IOLENGTH", " iolength = %v", BT_INTEGER},
81 tag_convert = {"CONVERT", " convert = %e", BT_CHARACTER},
82 tag_err = {"ERR", " err = %l", BT_UNKNOWN},
83 tag_end = {"END", " end = %l", BT_UNKNOWN},
84 tag_eor = {"EOR", " eor = %l", BT_UNKNOWN};
86 static gfc_dt *current_dt;
88 #define RESOLVE_TAG(x, y) if (resolve_tag(x, y) == FAILURE) return FAILURE;
91 /**************** Fortran 95 FORMAT parser *****************/
93 /* FORMAT tokens returned by format_lex(). */
96 FMT_NONE, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
97 FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_POS, FMT_LPAREN,
98 FMT_RPAREN, FMT_X, FMT_SIGN, FMT_BLANK, FMT_CHAR, FMT_P, FMT_IBOZ, FMT_F,
99 FMT_E, FMT_EXT, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END
103 /* Local variables for checking format strings. The saved_token is
104 used to back up by a single format token during the parsing
106 static char *format_string;
107 static int format_length, use_last_char;
109 static format_token saved_token;
112 { MODE_STRING, MODE_FORMAT, MODE_COPY }
116 /* Return the next character in the format string. */
119 next_char (int in_string)
131 if (mode == MODE_STRING)
132 c = *format_string++;
135 c = gfc_next_char_literal (in_string);
139 if (mode == MODE_COPY)
140 *format_string++ = c;
148 /* Back up one character position. Only works once. */
157 /* Eat up the spaces and return a character. */
160 next_char_not_space(void)
167 while (gfc_is_whitespace (c));
171 static int value = 0;
173 /* Simple lexical analyzer for getting the next token in a FORMAT
184 if (saved_token != FMT_NONE)
187 saved_token = FMT_NONE;
191 c = next_char_not_space ();
199 c = next_char_not_space ();
210 c = next_char_not_space ();
212 value = 10 * value + c - '0';
221 token = FMT_SIGNED_INT;
240 c = next_char_not_space ();
244 value = 10 * value + c - '0';
249 token = zflag ? FMT_ZERO : FMT_POSINT;
273 c = next_char_not_space ();
274 if (c != 'L' && c != 'R')
293 c = next_char_not_space ();
294 if (c != 'P' && c != 'S')
301 c = next_char_not_space ();
302 if (c == 'N' || c == 'Z')
363 c = next_char_not_space ();
364 if (c == 'N' || c == 'S')
407 /* Check a format statement. The format string, either from a FORMAT
408 statement or a constant in an I/O statement has already been parsed
409 by itself, and we are checking it for validity. The dual origin
410 means that the warning message is a little less than great. */
415 const char *posint_required = _("Positive width required");
416 const char *period_required = _("Period required");
417 const char *nonneg_required = _("Nonnegative width required");
418 const char *unexpected_element = _("Unexpected element");
419 const char *unexpected_end = _("Unexpected end of format string");
428 saved_token = FMT_NONE;
436 error = _("Missing leading left parenthesis");
442 goto finished; /* Empty format is legal */
446 /* In this state, the next thing has to be a format item. */
470 /* Signed integer can only precede a P format. */
474 error = _("Expected P edit descriptor");
481 /* P requires a prior number. */
482 error = _("P descriptor requires leading scale factor");
486 /* X requires a prior number if we're being pedantic. */
487 if (gfc_notify_std (GFC_STD_GNU, "Extension: X descriptor "
488 "requires leading space count at %C")
498 goto extension_optional_comma;
507 if (gfc_notify_std (GFC_STD_GNU, "Extension: $ descriptor at %C")
510 if (t != FMT_RPAREN || level > 0)
512 error = _("$ must be the last specifier");
533 error = unexpected_end;
537 error = unexpected_element;
542 /* In this state, t must currently be a data descriptor.
543 Deal with things that can/must follow the descriptor. */
557 error = _("Repeat count cannot follow P descriptor");
572 error = posint_required;
588 error = posint_required;
595 error = period_required;
600 if (u != FMT_ZERO && u != FMT_POSINT)
602 error = nonneg_required;
609 /* Look for optional exponent. */
620 error = _("Positive exponent width required");
629 if (t != FMT_ZERO && t != FMT_POSINT)
631 error = nonneg_required;
638 error = period_required;
643 if (t != FMT_ZERO && t != FMT_POSINT)
645 error = nonneg_required;
652 if(mode == MODE_STRING)
654 format_string += value;
655 format_length -= value;
669 if (t != FMT_ZERO && t != FMT_POSINT)
671 error = nonneg_required;
683 if (t != FMT_ZERO && t != FMT_POSINT)
685 error = nonneg_required;
693 error = unexpected_element;
698 /* Between a descriptor and what comes next. */
717 error = unexpected_end;
721 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
728 /* Optional comma is a weird between state where we've just finished
729 reading a colon, slash or P descriptor. */
743 /* Assume that we have another format item. */
750 extension_optional_comma:
751 /* As a GNU extension, permit a missing comma after a string literal. */
769 error = unexpected_end;
773 if (gfc_notify_std (GFC_STD_GNU, "Extension: Missing comma at %C")
783 /* Something went wrong. If the format we're checking is a string,
784 generate a warning, since the program is correct. If the format
785 is in a FORMAT statement, this messes up parsing, which is an
787 if (mode != MODE_STRING)
788 gfc_error ("%s in format string at %C", error);
791 gfc_warning ("%s in format string at %C", error);
793 /* TODO: More elaborate measures are needed to show where a problem
794 is within a format string that has been calculated. */
804 /* Given an expression node that is a constant string, see if it looks
805 like a format string. */
808 check_format_string (gfc_expr * e)
812 format_string = e->value.character.string;
817 /************ Fortran 95 I/O statement matchers *************/
819 /* Match a FORMAT statement. This amounts to actually parsing the
820 format descriptors in order to correctly locate the end of the
824 gfc_match_format (void)
829 if (gfc_current_ns->proc_name
830 && gfc_current_ns->proc_name->attr.flavor == FL_MODULE)
832 gfc_error ("Format statement in module main block at %C.");
836 if (gfc_statement_label == NULL)
838 gfc_error ("Missing format label at %C");
841 gfc_gobble_whitespace ();
846 start = gfc_current_locus;
848 if (check_format () == FAILURE)
851 if (gfc_match_eos () != MATCH_YES)
853 gfc_syntax_error (ST_FORMAT);
857 /* The label doesn't get created until after the statement is done
858 being matched, so we have to leave the string for later. */
860 gfc_current_locus = start; /* Back to the beginning */
863 new_st.op = EXEC_NOP;
866 e->expr_type = EXPR_CONSTANT;
867 e->ts.type = BT_CHARACTER;
868 e->ts.kind = gfc_default_character_kind;
870 e->value.character.string = format_string = gfc_getmem(format_length+1);
871 e->value.character.length = format_length;
872 gfc_statement_label->format = e;
875 check_format (); /* Guaranteed to succeed */
876 gfc_match_eos (); /* Guaranteed to succeed */
882 /* Match an expression I/O tag of some sort. */
885 match_etag (const io_tag * tag, gfc_expr ** v)
890 m = gfc_match (tag->spec, &result);
896 gfc_error ("Duplicate %s specification at %C", tag->name);
897 gfc_free_expr (result);
906 /* Match a variable I/O tag of some sort. */
909 match_vtag (const io_tag * tag, gfc_expr ** v)
914 m = gfc_match (tag->spec, &result);
920 gfc_error ("Duplicate %s specification at %C", tag->name);
921 gfc_free_expr (result);
925 if (result->symtree->n.sym->attr.intent == INTENT_IN)
927 gfc_error ("Variable tag cannot be INTENT(IN) at %C");
928 gfc_free_expr (result);
932 if (gfc_pure (NULL) && gfc_impure_variable (result->symtree->n.sym))
934 gfc_error ("Variable tag cannot be assigned in PURE procedure at %C");
935 gfc_free_expr (result);
944 /* Match I/O tags that cause variables to become redefined. */
947 match_out_tag(const io_tag *tag, gfc_expr **result)
951 m = match_vtag(tag, result);
953 gfc_check_do_variable((*result)->symtree);
959 /* Match a label I/O tag. */
962 match_ltag (const io_tag * tag, gfc_st_label ** label)
968 m = gfc_match (tag->spec, label);
969 if (m == MATCH_YES && old != 0)
971 gfc_error ("Duplicate %s label specification at %C", tag->name);
976 && gfc_reference_st_label (*label, ST_LABEL_TARGET) == FAILURE)
983 /* Do expression resolution and type-checking on an expression tag. */
986 resolve_tag (const io_tag * tag, gfc_expr * e)
992 if (gfc_resolve_expr (e) == FAILURE)
995 if (e->ts.type != tag->type && tag != &tag_format)
997 gfc_error ("%s tag at %L must be of type %s", tag->name,
998 &e->where, gfc_basic_typename (tag->type));
1002 if (tag == &tag_format)
1004 if (e->expr_type == EXPR_CONSTANT
1005 && (e->ts.type != BT_CHARACTER
1006 || e->ts.kind != gfc_default_character_kind))
1008 gfc_error ("Constant expression in FORMAT tag at %L must be "
1009 "of type default CHARACTER", &e->where);
1013 /* If e's rank is zero and e is not an element of an array, it should be
1014 of integer or character type. The integer variable should be
1016 if (e->symtree == NULL || e->symtree->n.sym->as == NULL
1017 || e->symtree->n.sym->as->rank == 0)
1019 if (e->ts.type != BT_CHARACTER && e->ts.type != BT_INTEGER)
1021 gfc_error ("%s tag at %L must be of type %s or %s", tag->name,
1022 &e->where, gfc_basic_typename (BT_CHARACTER),
1023 gfc_basic_typename (BT_INTEGER));
1026 else if (e->ts.type == BT_INTEGER && e->expr_type == EXPR_VARIABLE)
1028 if (gfc_notify_std (GFC_STD_F95_DEL,
1029 "Obsolete: ASSIGNED variable in FORMAT tag at %L",
1030 &e->where) == FAILURE)
1032 if (e->symtree->n.sym->attr.assign != 1)
1034 gfc_error ("Variable '%s' at %L has not been assigned a "
1035 "format label", e->symtree->n.sym->name, &e->where);
1043 /* if rank is nonzero, we allow the type to be character under
1044 GFC_STD_GNU and other type under GFC_STD_LEGACY. It may be
1045 assigned an Hollerith constant. */
1046 if (e->ts.type == BT_CHARACTER)
1048 if (gfc_notify_std (GFC_STD_GNU,
1049 "Extension: Character array in FORMAT tag at %L",
1050 &e->where) == FAILURE)
1055 if (gfc_notify_std (GFC_STD_LEGACY,
1056 "Extension: Non-character in FORMAT tag at %L",
1057 &e->where) == FAILURE)
1067 gfc_error ("%s tag at %L must be scalar", tag->name, &e->where);
1071 if (tag == &tag_iomsg)
1073 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IOMSG tag at %L",
1074 &e->where) == FAILURE)
1078 if (tag == &tag_iostat && e->ts.kind != gfc_default_integer_kind)
1080 if (gfc_notify_std (GFC_STD_GNU, "Fortran 95 requires default "
1081 "INTEGER in IOSTAT tag at %L",
1082 &e->where) == FAILURE)
1086 if (tag == &tag_size && e->ts.kind != gfc_default_integer_kind)
1088 if (gfc_notify_std (GFC_STD_GNU, "Fortran 95 requires default "
1089 "INTEGER in SIZE tag at %L",
1090 &e->where) == FAILURE)
1094 if (tag == &tag_convert)
1096 if (gfc_notify_std (GFC_STD_GNU, "Extension: CONVERT tag at %L",
1097 &e->where) == FAILURE)
1106 /* Match a single tag of an OPEN statement. */
1109 match_open_element (gfc_open * open)
1113 m = match_etag (&tag_unit, &open->unit);
1116 m = match_out_tag (&tag_iomsg, &open->iomsg);
1119 m = match_out_tag (&tag_iostat, &open->iostat);
1122 m = match_etag (&tag_file, &open->file);
1125 m = match_etag (&tag_status, &open->status);
1128 m = match_etag (&tag_e_access, &open->access);
1131 m = match_etag (&tag_e_form, &open->form);
1134 m = match_etag (&tag_e_recl, &open->recl);
1137 m = match_etag (&tag_e_blank, &open->blank);
1140 m = match_etag (&tag_e_position, &open->position);
1143 m = match_etag (&tag_e_action, &open->action);
1146 m = match_etag (&tag_e_delim, &open->delim);
1149 m = match_etag (&tag_e_pad, &open->pad);
1152 m = match_ltag (&tag_err, &open->err);
1155 m = match_etag (&tag_convert, &open->convert);
1163 /* Free the gfc_open structure and all the expressions it contains. */
1166 gfc_free_open (gfc_open * open)
1172 gfc_free_expr (open->unit);
1173 gfc_free_expr (open->iomsg);
1174 gfc_free_expr (open->iostat);
1175 gfc_free_expr (open->file);
1176 gfc_free_expr (open->status);
1177 gfc_free_expr (open->access);
1178 gfc_free_expr (open->form);
1179 gfc_free_expr (open->recl);
1180 gfc_free_expr (open->blank);
1181 gfc_free_expr (open->position);
1182 gfc_free_expr (open->action);
1183 gfc_free_expr (open->delim);
1184 gfc_free_expr (open->pad);
1185 gfc_free_expr (open->convert);
1191 /* Resolve everything in a gfc_open structure. */
1194 gfc_resolve_open (gfc_open * open)
1197 RESOLVE_TAG (&tag_unit, open->unit);
1198 RESOLVE_TAG (&tag_iomsg, open->iomsg);
1199 RESOLVE_TAG (&tag_iostat, open->iostat);
1200 RESOLVE_TAG (&tag_file, open->file);
1201 RESOLVE_TAG (&tag_status, open->status);
1202 RESOLVE_TAG (&tag_e_access, open->access);
1203 RESOLVE_TAG (&tag_e_form, open->form);
1204 RESOLVE_TAG (&tag_e_recl, open->recl);
1206 RESOLVE_TAG (&tag_e_blank, open->blank);
1207 RESOLVE_TAG (&tag_e_position, open->position);
1208 RESOLVE_TAG (&tag_e_action, open->action);
1209 RESOLVE_TAG (&tag_e_delim, open->delim);
1210 RESOLVE_TAG (&tag_e_pad, open->pad);
1211 RESOLVE_TAG (&tag_convert, open->convert);
1213 if (gfc_reference_st_label (open->err, ST_LABEL_TARGET) == FAILURE)
1220 /* Match an OPEN statement. */
1223 gfc_match_open (void)
1228 m = gfc_match_char ('(');
1232 open = gfc_getmem (sizeof (gfc_open));
1234 m = match_open_element (open);
1236 if (m == MATCH_ERROR)
1240 m = gfc_match_expr (&open->unit);
1243 if (m == MATCH_ERROR)
1249 if (gfc_match_char (')') == MATCH_YES)
1251 if (gfc_match_char (',') != MATCH_YES)
1254 m = match_open_element (open);
1255 if (m == MATCH_ERROR)
1261 if (gfc_match_eos () == MATCH_NO)
1264 if (gfc_pure (NULL))
1266 gfc_error ("OPEN statement not allowed in PURE procedure at %C");
1270 new_st.op = EXEC_OPEN;
1271 new_st.ext.open = open;
1275 gfc_syntax_error (ST_OPEN);
1278 gfc_free_open (open);
1283 /* Free a gfc_close structure an all its expressions. */
1286 gfc_free_close (gfc_close * close)
1292 gfc_free_expr (close->unit);
1293 gfc_free_expr (close->iomsg);
1294 gfc_free_expr (close->iostat);
1295 gfc_free_expr (close->status);
1301 /* Match elements of a CLOSE statement. */
1304 match_close_element (gfc_close * close)
1308 m = match_etag (&tag_unit, &close->unit);
1311 m = match_etag (&tag_status, &close->status);
1314 m = match_out_tag (&tag_iomsg, &close->iomsg);
1317 m = match_out_tag (&tag_iostat, &close->iostat);
1320 m = match_ltag (&tag_err, &close->err);
1328 /* Match a CLOSE statement. */
1331 gfc_match_close (void)
1336 m = gfc_match_char ('(');
1340 close = gfc_getmem (sizeof (gfc_close));
1342 m = match_close_element (close);
1344 if (m == MATCH_ERROR)
1348 m = gfc_match_expr (&close->unit);
1351 if (m == MATCH_ERROR)
1357 if (gfc_match_char (')') == MATCH_YES)
1359 if (gfc_match_char (',') != MATCH_YES)
1362 m = match_close_element (close);
1363 if (m == MATCH_ERROR)
1369 if (gfc_match_eos () == MATCH_NO)
1372 if (gfc_pure (NULL))
1374 gfc_error ("CLOSE statement not allowed in PURE procedure at %C");
1378 new_st.op = EXEC_CLOSE;
1379 new_st.ext.close = close;
1383 gfc_syntax_error (ST_CLOSE);
1386 gfc_free_close (close);
1391 /* Resolve everything in a gfc_close structure. */
1394 gfc_resolve_close (gfc_close * close)
1397 RESOLVE_TAG (&tag_unit, close->unit);
1398 RESOLVE_TAG (&tag_iomsg, close->iomsg);
1399 RESOLVE_TAG (&tag_iostat, close->iostat);
1400 RESOLVE_TAG (&tag_status, close->status);
1402 if (gfc_reference_st_label (close->err, ST_LABEL_TARGET) == FAILURE)
1409 /* Free a gfc_filepos structure. */
1412 gfc_free_filepos (gfc_filepos * fp)
1415 gfc_free_expr (fp->unit);
1416 gfc_free_expr (fp->iomsg);
1417 gfc_free_expr (fp->iostat);
1422 /* Match elements of a REWIND, BACKSPACE, ENDFILE, or FLUSH statement. */
1425 match_file_element (gfc_filepos * fp)
1429 m = match_etag (&tag_unit, &fp->unit);
1432 m = match_out_tag (&tag_iomsg, &fp->iomsg);
1435 m = match_out_tag (&tag_iostat, &fp->iostat);
1438 m = match_ltag (&tag_err, &fp->err);
1446 /* Match the second half of the file-positioning statements, REWIND,
1447 BACKSPACE, ENDFILE, or the FLUSH statement. */
1450 match_filepos (gfc_statement st, gfc_exec_op op)
1455 fp = gfc_getmem (sizeof (gfc_filepos));
1457 if (gfc_match_char ('(') == MATCH_NO)
1459 m = gfc_match_expr (&fp->unit);
1460 if (m == MATCH_ERROR)
1468 m = match_file_element (fp);
1469 if (m == MATCH_ERROR)
1473 m = gfc_match_expr (&fp->unit);
1474 if (m == MATCH_ERROR)
1482 if (gfc_match_char (')') == MATCH_YES)
1484 if (gfc_match_char (',') != MATCH_YES)
1487 m = match_file_element (fp);
1488 if (m == MATCH_ERROR)
1495 if (gfc_match_eos () != MATCH_YES)
1498 if (gfc_pure (NULL))
1500 gfc_error ("%s statement not allowed in PURE procedure at %C",
1501 gfc_ascii_statement (st));
1507 new_st.ext.filepos = fp;
1511 gfc_syntax_error (st);
1514 gfc_free_filepos (fp);
1520 gfc_resolve_filepos (gfc_filepos * fp)
1523 RESOLVE_TAG (&tag_unit, fp->unit);
1524 RESOLVE_TAG (&tag_iostat, fp->iostat);
1525 RESOLVE_TAG (&tag_iomsg, fp->iomsg);
1526 if (gfc_reference_st_label (fp->err, ST_LABEL_TARGET) == FAILURE)
1533 /* Match the file positioning statements: ENDFILE, BACKSPACE, REWIND,
1534 and the FLUSH statement. */
1537 gfc_match_endfile (void)
1540 return match_filepos (ST_END_FILE, EXEC_ENDFILE);
1544 gfc_match_backspace (void)
1547 return match_filepos (ST_BACKSPACE, EXEC_BACKSPACE);
1551 gfc_match_rewind (void)
1554 return match_filepos (ST_REWIND, EXEC_REWIND);
1558 gfc_match_flush (void)
1560 if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: FLUSH statement at %C") == FAILURE)
1563 return match_filepos (ST_FLUSH, EXEC_FLUSH);
1566 /******************** Data Transfer Statements *********************/
1569 { M_READ, M_WRITE, M_PRINT, M_INQUIRE }
1573 /* Return a default unit number. */
1576 default_unit (io_kind k)
1585 return gfc_int_expr (unit);
1589 /* Match a unit specification for a data transfer statement. */
1592 match_dt_unit (io_kind k, gfc_dt * dt)
1596 if (gfc_match_char ('*') == MATCH_YES)
1598 if (dt->io_unit != NULL)
1601 dt->io_unit = default_unit (k);
1605 if (gfc_match_expr (&e) == MATCH_YES)
1607 if (dt->io_unit != NULL)
1620 gfc_error ("Duplicate UNIT specification at %C");
1625 /* Match a format specification. */
1628 match_dt_format (gfc_dt * dt)
1632 gfc_st_label *label;
1634 where = gfc_current_locus;
1636 if (gfc_match_char ('*') == MATCH_YES)
1638 if (dt->format_expr != NULL || dt->format_label != NULL)
1641 dt->format_label = &format_asterisk;
1645 if (gfc_match_st_label (&label) == MATCH_YES)
1647 if (dt->format_expr != NULL || dt->format_label != NULL)
1649 gfc_free_st_label (label);
1653 if (gfc_reference_st_label (label, ST_LABEL_FORMAT) == FAILURE)
1656 dt->format_label = label;
1660 if (gfc_match_expr (&e) == MATCH_YES)
1662 if (dt->format_expr != NULL || dt->format_label != NULL)
1667 dt->format_expr = e;
1671 gfc_current_locus = where; /* The only case where we have to restore */
1676 gfc_error ("Duplicate format specification at %C");
1681 /* Traverse a namelist that is part of a READ statement to make sure
1682 that none of the variables in the namelist are INTENT(IN). Returns
1683 nonzero if we find such a variable. */
1686 check_namelist (gfc_symbol * sym)
1690 for (p = sym->namelist; p; p = p->next)
1691 if (p->sym->attr.intent == INTENT_IN)
1693 gfc_error ("Symbol '%s' in namelist '%s' is INTENT(IN) at %C",
1694 p->sym->name, sym->name);
1702 /* Match a single data transfer element. */
1705 match_dt_element (io_kind k, gfc_dt * dt)
1707 char name[GFC_MAX_SYMBOL_LEN + 1];
1711 if (gfc_match (" unit =") == MATCH_YES)
1713 m = match_dt_unit (k, dt);
1718 if (gfc_match (" fmt =") == MATCH_YES)
1720 m = match_dt_format (dt);
1725 if (gfc_match (" nml = %n", name) == MATCH_YES)
1727 if (dt->namelist != NULL)
1729 gfc_error ("Duplicate NML specification at %C");
1733 if (gfc_find_symbol (name, NULL, 1, &sym))
1736 if (sym == NULL || sym->attr.flavor != FL_NAMELIST)
1738 gfc_error ("Symbol '%s' at %C must be a NAMELIST group name",
1739 sym != NULL ? sym->name : name);
1744 if (k == M_READ && check_namelist (sym))
1750 m = match_etag (&tag_rec, &dt->rec);
1753 m = match_out_tag (&tag_iomsg, &dt->iomsg);
1756 m = match_out_tag (&tag_iostat, &dt->iostat);
1759 m = match_ltag (&tag_err, &dt->err);
1761 dt->err_where = gfc_current_locus;
1764 m = match_etag (&tag_advance, &dt->advance);
1767 m = match_out_tag (&tag_size, &dt->size);
1771 m = match_ltag (&tag_end, &dt->end);
1776 gfc_error ("END tag at %C not allowed in output statement");
1779 dt->end_where = gfc_current_locus;
1784 m = match_ltag (&tag_eor, &dt->eor);
1786 dt->eor_where = gfc_current_locus;
1794 /* Free a data transfer structure and everything below it. */
1797 gfc_free_dt (gfc_dt * dt)
1803 gfc_free_expr (dt->io_unit);
1804 gfc_free_expr (dt->format_expr);
1805 gfc_free_expr (dt->rec);
1806 gfc_free_expr (dt->advance);
1807 gfc_free_expr (dt->iomsg);
1808 gfc_free_expr (dt->iostat);
1809 gfc_free_expr (dt->size);
1815 /* Resolve everything in a gfc_dt structure. */
1818 gfc_resolve_dt (gfc_dt * dt)
1822 RESOLVE_TAG (&tag_format, dt->format_expr);
1823 RESOLVE_TAG (&tag_rec, dt->rec);
1824 RESOLVE_TAG (&tag_advance, dt->advance);
1825 RESOLVE_TAG (&tag_iomsg, dt->iomsg);
1826 RESOLVE_TAG (&tag_iostat, dt->iostat);
1827 RESOLVE_TAG (&tag_size, dt->size);
1830 if (gfc_resolve_expr (e) == SUCCESS
1831 && (e->ts.type != BT_INTEGER
1832 && (e->ts.type != BT_CHARACTER
1833 || e->expr_type != EXPR_VARIABLE)))
1836 ("UNIT specification at %L must be an INTEGER expression or a "
1837 "CHARACTER variable", &e->where);
1841 if (e->ts.type == BT_CHARACTER)
1843 if (gfc_has_vector_index (e))
1845 gfc_error ("Internal unit with vector subscript at %L",
1851 if (e->rank && e->ts.type != BT_CHARACTER)
1853 gfc_error ("External IO UNIT cannot be an array at %L", &e->where);
1859 if (gfc_reference_st_label (dt->err, ST_LABEL_TARGET) == FAILURE)
1861 if (dt->err->defined == ST_LABEL_UNKNOWN)
1863 gfc_error ("ERR tag label %d at %L not defined",
1864 dt->err->value, &dt->err_where);
1871 if (gfc_reference_st_label (dt->end, ST_LABEL_TARGET) == FAILURE)
1873 if (dt->end->defined == ST_LABEL_UNKNOWN)
1875 gfc_error ("END tag label %d at %L not defined",
1876 dt->end->value, &dt->end_where);
1883 if (gfc_reference_st_label (dt->eor, ST_LABEL_TARGET) == FAILURE)
1885 if (dt->eor->defined == ST_LABEL_UNKNOWN)
1887 gfc_error ("EOR tag label %d at %L not defined",
1888 dt->eor->value, &dt->eor_where);
1893 /* Check the format label actually exists. */
1894 if (dt->format_label && dt->format_label != &format_asterisk
1895 && dt->format_label->defined == ST_LABEL_UNKNOWN)
1897 gfc_error ("FORMAT label %d at %L not defined", dt->format_label->value,
1898 &dt->format_label->where);
1905 /* Given an io_kind, return its name. */
1908 io_kind_name (io_kind k)
1927 gfc_internal_error ("io_kind_name(): bad I/O-kind");
1934 /* Match an IO iteration statement of the form:
1936 ( [<IO element> ,] <IO element>, I = <expr>, <expr> [, <expr> ] )
1938 which is equivalent to a single IO element. This function is
1939 mutually recursive with match_io_element(). */
1941 static match match_io_element (io_kind k, gfc_code **);
1944 match_io_iterator (io_kind k, gfc_code ** result)
1946 gfc_code *head, *tail, *new;
1954 old_loc = gfc_current_locus;
1956 if (gfc_match_char ('(') != MATCH_YES)
1959 m = match_io_element (k, &head);
1962 if (m != MATCH_YES || gfc_match_char (',') != MATCH_YES)
1968 /* Can't be anything but an IO iterator. Build a list. */
1969 iter = gfc_get_iterator ();
1973 m = gfc_match_iterator (iter, 0);
1974 if (m == MATCH_ERROR)
1978 gfc_check_do_variable (iter->var->symtree);
1982 m = match_io_element (k, &new);
1983 if (m == MATCH_ERROR)
1992 tail = gfc_append_code (tail, new);
1994 if (gfc_match_char (',') != MATCH_YES)
2003 if (gfc_match_char (')') != MATCH_YES)
2006 new = gfc_get_code ();
2008 new->ext.iterator = iter;
2010 new->block = gfc_get_code ();
2011 new->block->op = EXEC_DO;
2012 new->block->next = head;
2018 gfc_error ("Syntax error in I/O iterator at %C");
2022 gfc_free_iterator (iter, 1);
2023 gfc_free_statements (head);
2024 gfc_current_locus = old_loc;
2029 /* Match a single element of an IO list, which is either a single
2030 expression or an IO Iterator. */
2033 match_io_element (io_kind k, gfc_code ** cpp)
2041 m = match_io_iterator (k, cpp);
2047 m = gfc_match_variable (&expr, 0);
2049 gfc_error ("Expected variable in READ statement at %C");
2053 m = gfc_match_expr (&expr);
2055 gfc_error ("Expected expression in %s statement at %C",
2063 if (expr->symtree->n.sym->attr.intent == INTENT_IN)
2066 ("Variable '%s' in input list at %C cannot be INTENT(IN)",
2067 expr->symtree->n.sym->name);
2072 && gfc_impure_variable (expr->symtree->n.sym)
2073 && current_dt->io_unit->ts.type == BT_CHARACTER)
2075 gfc_error ("Cannot read to variable '%s' in PURE procedure at %C",
2076 expr->symtree->n.sym->name);
2080 if (gfc_check_do_variable (expr->symtree))
2086 if (current_dt->io_unit->ts.type == BT_CHARACTER
2088 && current_dt->io_unit->expr_type == EXPR_VARIABLE
2089 && gfc_impure_variable (current_dt->io_unit->symtree->n.sym))
2092 ("Cannot write to internal file unit '%s' at %C inside a "
2093 "PURE procedure", current_dt->io_unit->symtree->n.sym->name);
2105 gfc_free_expr (expr);
2109 cp = gfc_get_code ();
2110 cp->op = EXEC_TRANSFER;
2118 /* Match an I/O list, building gfc_code structures as we go. */
2121 match_io_list (io_kind k, gfc_code ** head_p)
2123 gfc_code *head, *tail, *new;
2126 *head_p = head = tail = NULL;
2127 if (gfc_match_eos () == MATCH_YES)
2132 m = match_io_element (k, &new);
2133 if (m == MATCH_ERROR)
2138 tail = gfc_append_code (tail, new);
2142 if (gfc_match_eos () == MATCH_YES)
2144 if (gfc_match_char (',') != MATCH_YES)
2152 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2155 gfc_free_statements (head);
2160 /* Attach the data transfer end node. */
2163 terminate_io (gfc_code * io_code)
2167 if (io_code == NULL)
2168 io_code = new_st.block;
2170 c = gfc_get_code ();
2171 c->op = EXEC_DT_END;
2173 /* Point to structure that is already there */
2174 c->ext.dt = new_st.ext.dt;
2175 gfc_append_code (io_code, c);
2179 /* Check the constraints for a data transfer statement. The majority of the
2180 constraints appearing in 9.4 of the standard appear here. Some are handled
2181 in resolve_tag and others in gfc_resolve_dt. */
2184 check_io_constraints (io_kind k, gfc_dt *dt, gfc_code * io_code, locus * spec_end)
2186 #define io_constraint(condition,msg,arg)\
2189 gfc_error(msg,arg);\
2195 gfc_symbol * sym = NULL;
2200 if (expr && expr->expr_type == EXPR_VARIABLE
2201 && expr->ts.type == BT_CHARACTER)
2203 sym = expr->symtree->n.sym;
2205 io_constraint (k == M_WRITE && sym->attr.intent == INTENT_IN,
2206 "Internal file at %L must not be INTENT(IN)",
2209 io_constraint (gfc_has_vector_index (dt->io_unit),
2210 "Internal file incompatible with vector subscript at %L",
2213 io_constraint (dt->rec != NULL,
2214 "REC tag at %L is incompatible with internal file",
2217 io_constraint (dt->namelist != NULL,
2218 "Internal file at %L is incompatible with namelist",
2221 io_constraint (dt->advance != NULL,
2222 "ADVANCE tag at %L is incompatible with internal file",
2223 &dt->advance->where);
2226 if (expr && expr->ts.type != BT_CHARACTER)
2229 io_constraint (gfc_pure (NULL)
2230 && (k == M_READ || k == M_WRITE),
2231 "IO UNIT in %s statement at %C must be "
2232 "an internal file in a PURE procedure",
2239 io_constraint (dt->end,
2240 "END tag not allowed with output at %L",
2243 io_constraint (dt->eor,
2244 "EOR tag not allowed with output at %L",
2247 io_constraint (k != M_READ && dt->size,
2248 "SIZE=specifier not allowed with output at %L",
2253 io_constraint (dt->size && dt->advance == NULL,
2254 "SIZE tag at %L requires an ADVANCE tag",
2257 io_constraint (dt->eor && dt->advance == NULL,
2258 "EOR tag at %L requires an ADVANCE tag",
2266 io_constraint (io_code && dt->namelist,
2267 "NAMELIST cannot be followed by IO-list at %L",
2270 io_constraint (dt->format_expr,
2271 "IO spec-list cannot contain both NAMELIST group name "
2272 "and format specification at %L.",
2273 &dt->format_expr->where);
2275 io_constraint (dt->format_label,
2276 "IO spec-list cannot contain both NAMELIST group name "
2277 "and format label at %L", spec_end);
2279 io_constraint (dt->rec,
2280 "NAMELIST IO is not allowed with a REC=specifier "
2281 "at %L.", &dt->rec->where);
2283 io_constraint (dt->advance,
2284 "NAMELIST IO is not allowed with a ADVANCE=specifier "
2285 "at %L.", &dt->advance->where);
2290 io_constraint (dt->end,
2291 "An END tag is not allowed with a "
2292 "REC=specifier at %L.", &dt->end_where);
2295 io_constraint (dt->format_label == &format_asterisk,
2296 "FMT=* is not allowed with a REC=specifier "
2297 "at %L.", spec_end);
2302 const char * advance;
2303 int not_yes, not_no;
2305 advance = expr->value.character.string;
2307 io_constraint (dt->format_label == &format_asterisk,
2308 "List directed format(*) is not allowed with a "
2309 "ADVANCE=specifier at %L.", &expr->where);
2311 not_no = strncasecmp (advance, "no", 2) != 0;
2312 not_yes = strncasecmp (advance, "yes", 2) != 0;
2314 io_constraint (expr->expr_type == EXPR_CONSTANT
2315 && not_no && not_yes,
2316 "ADVANCE=specifier at %L must have value = "
2317 "YES or NO.", &expr->where);
2319 io_constraint (dt->size && expr->expr_type == EXPR_CONSTANT
2320 && not_no && k == M_READ,
2321 "SIZE tag at %L requires an ADVANCE = 'NO'",
2324 io_constraint (dt->eor && expr->expr_type == EXPR_CONSTANT
2325 && not_no && k == M_READ,
2326 "EOR tag at %L requires an ADVANCE = 'NO'",
2330 expr = dt->format_expr;
2331 if (expr != NULL && expr->expr_type == EXPR_CONSTANT)
2332 check_format_string (expr);
2336 #undef io_constraint
2338 /* Match a READ, WRITE or PRINT statement. */
2341 match_io (io_kind k)
2343 char name[GFC_MAX_SYMBOL_LEN + 1];
2352 where = gfc_current_locus;
2354 current_dt = dt = gfc_getmem (sizeof (gfc_dt));
2355 if (gfc_match_char ('(') == MATCH_NO)
2357 where = gfc_current_locus;
2360 else if (k == M_PRINT)
2362 /* Treat the non-standard case of PRINT namelist. */
2363 if ((gfc_current_form == FORM_FIXED || gfc_peek_char () == ' ')
2364 && gfc_match_name (name) == MATCH_YES)
2366 gfc_find_symbol (name, NULL, 1, &sym);
2367 if (sym && sym->attr.flavor == FL_NAMELIST)
2369 if (gfc_notify_std (GFC_STD_GNU, "PRINT namelist at "
2370 "%C is an extension") == FAILURE)
2376 dt->io_unit = default_unit (k);
2381 gfc_current_locus = where;
2385 if (gfc_current_form == FORM_FREE)
2387 c = gfc_peek_char();
2388 if (c != ' ' && c != '*' && c != '\'' && c != '"')
2395 m = match_dt_format (dt);
2396 if (m == MATCH_ERROR)
2402 dt->io_unit = default_unit (k);
2406 /* Match a control list */
2407 if (match_dt_element (k, dt) == MATCH_YES)
2409 if (match_dt_unit (k, dt) != MATCH_YES)
2412 if (gfc_match_char (')') == MATCH_YES)
2414 if (gfc_match_char (',') != MATCH_YES)
2417 m = match_dt_element (k, dt);
2420 if (m == MATCH_ERROR)
2423 m = match_dt_format (dt);
2426 if (m == MATCH_ERROR)
2429 where = gfc_current_locus;
2431 m = gfc_match_name (name);
2434 gfc_find_symbol (name, NULL, 1, &sym);
2435 if (sym && sym->attr.flavor == FL_NAMELIST)
2438 if (k == M_READ && check_namelist (sym))
2447 gfc_current_locus = where;
2449 goto loop; /* No matches, try regular elements */
2452 if (gfc_match_char (')') == MATCH_YES)
2454 if (gfc_match_char (',') != MATCH_YES)
2460 m = match_dt_element (k, dt);
2463 if (m == MATCH_ERROR)
2466 if (gfc_match_char (')') == MATCH_YES)
2468 if (gfc_match_char (',') != MATCH_YES)
2474 /* Used in check_io_constraints, where no locus is available. */
2475 spec_end = gfc_current_locus;
2477 /* Optional leading comma (non-standard). */
2479 && gfc_match_char (',') == MATCH_YES
2481 && gfc_notify_std (GFC_STD_GNU, "Extension: Comma before output "
2482 "item list at %C is an extension") == FAILURE)
2486 if (gfc_match_eos () != MATCH_YES)
2488 if (comma_flag && gfc_match_char (',') != MATCH_YES)
2490 gfc_error ("Expected comma in I/O list at %C");
2495 m = match_io_list (k, &io_code);
2496 if (m == MATCH_ERROR)
2502 /* A full IO statement has been matched. Check the constraints. spec_end is
2503 supplied for cases where no locus is supplied. */
2504 m = check_io_constraints (k, dt, io_code, &spec_end);
2506 if (m == MATCH_ERROR)
2509 new_st.op = (k == M_READ) ? EXEC_READ : EXEC_WRITE;
2511 new_st.block = gfc_get_code ();
2512 new_st.block->op = new_st.op;
2513 new_st.block->next = io_code;
2515 terminate_io (io_code);
2520 gfc_error ("Syntax error in %s statement at %C", io_kind_name (k));
2530 gfc_match_read (void)
2532 return match_io (M_READ);
2536 gfc_match_write (void)
2538 return match_io (M_WRITE);
2542 gfc_match_print (void)
2546 m = match_io (M_PRINT);
2550 if (gfc_pure (NULL))
2552 gfc_error ("PRINT statement at %C not allowed within PURE procedure");
2560 /* Free a gfc_inquire structure. */
2563 gfc_free_inquire (gfc_inquire * inquire)
2566 if (inquire == NULL)
2569 gfc_free_expr (inquire->unit);
2570 gfc_free_expr (inquire->file);
2571 gfc_free_expr (inquire->iomsg);
2572 gfc_free_expr (inquire->iostat);
2573 gfc_free_expr (inquire->exist);
2574 gfc_free_expr (inquire->opened);
2575 gfc_free_expr (inquire->number);
2576 gfc_free_expr (inquire->named);
2577 gfc_free_expr (inquire->name);
2578 gfc_free_expr (inquire->access);
2579 gfc_free_expr (inquire->sequential);
2580 gfc_free_expr (inquire->direct);
2581 gfc_free_expr (inquire->form);
2582 gfc_free_expr (inquire->formatted);
2583 gfc_free_expr (inquire->unformatted);
2584 gfc_free_expr (inquire->recl);
2585 gfc_free_expr (inquire->nextrec);
2586 gfc_free_expr (inquire->blank);
2587 gfc_free_expr (inquire->position);
2588 gfc_free_expr (inquire->action);
2589 gfc_free_expr (inquire->read);
2590 gfc_free_expr (inquire->write);
2591 gfc_free_expr (inquire->readwrite);
2592 gfc_free_expr (inquire->delim);
2593 gfc_free_expr (inquire->pad);
2594 gfc_free_expr (inquire->iolength);
2595 gfc_free_expr (inquire->convert);
2601 /* Match an element of an INQUIRE statement. */
2603 #define RETM if (m != MATCH_NO) return m;
2606 match_inquire_element (gfc_inquire * inquire)
2610 m = match_etag (&tag_unit, &inquire->unit);
2611 RETM m = match_etag (&tag_file, &inquire->file);
2612 RETM m = match_ltag (&tag_err, &inquire->err);
2613 RETM m = match_out_tag (&tag_iomsg, &inquire->iomsg);
2614 RETM m = match_out_tag (&tag_iostat, &inquire->iostat);
2615 RETM m = match_vtag (&tag_exist, &inquire->exist);
2616 RETM m = match_vtag (&tag_opened, &inquire->opened);
2617 RETM m = match_vtag (&tag_named, &inquire->named);
2618 RETM m = match_vtag (&tag_name, &inquire->name);
2619 RETM m = match_out_tag (&tag_number, &inquire->number);
2620 RETM m = match_vtag (&tag_s_access, &inquire->access);
2621 RETM m = match_vtag (&tag_sequential, &inquire->sequential);
2622 RETM m = match_vtag (&tag_direct, &inquire->direct);
2623 RETM m = match_vtag (&tag_s_form, &inquire->form);
2624 RETM m = match_vtag (&tag_formatted, &inquire->formatted);
2625 RETM m = match_vtag (&tag_unformatted, &inquire->unformatted);
2626 RETM m = match_out_tag (&tag_s_recl, &inquire->recl);
2627 RETM m = match_out_tag (&tag_nextrec, &inquire->nextrec);
2628 RETM m = match_vtag (&tag_s_blank, &inquire->blank);
2629 RETM m = match_vtag (&tag_s_position, &inquire->position);
2630 RETM m = match_vtag (&tag_s_action, &inquire->action);
2631 RETM m = match_vtag (&tag_read, &inquire->read);
2632 RETM m = match_vtag (&tag_write, &inquire->write);
2633 RETM m = match_vtag (&tag_readwrite, &inquire->readwrite);
2634 RETM m = match_vtag (&tag_s_delim, &inquire->delim);
2635 RETM m = match_vtag (&tag_s_pad, &inquire->pad);
2636 RETM m = match_vtag (&tag_iolength, &inquire->iolength);
2637 RETM m = match_vtag (&tag_convert, &inquire->convert);
2638 RETM return MATCH_NO;
2645 gfc_match_inquire (void)
2647 gfc_inquire *inquire;
2652 m = gfc_match_char ('(');
2656 inquire = gfc_getmem (sizeof (gfc_inquire));
2658 loc = gfc_current_locus;
2660 m = match_inquire_element (inquire);
2661 if (m == MATCH_ERROR)
2665 m = gfc_match_expr (&inquire->unit);
2666 if (m == MATCH_ERROR)
2672 /* See if we have the IOLENGTH form of the inquire statement. */
2673 if (inquire->iolength != NULL)
2675 if (gfc_match_char (')') != MATCH_YES)
2678 m = match_io_list (M_INQUIRE, &code);
2679 if (m == MATCH_ERROR)
2684 new_st.op = EXEC_IOLENGTH;
2685 new_st.expr = inquire->iolength;
2686 new_st.ext.inquire = inquire;
2688 if (gfc_pure (NULL))
2690 gfc_free_statements (code);
2691 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
2695 new_st.block = gfc_get_code ();
2696 new_st.block->op = EXEC_IOLENGTH;
2697 terminate_io (code);
2698 new_st.block->next = code;
2702 /* At this point, we have the non-IOLENGTH inquire statement. */
2705 if (gfc_match_char (')') == MATCH_YES)
2707 if (gfc_match_char (',') != MATCH_YES)
2710 m = match_inquire_element (inquire);
2711 if (m == MATCH_ERROR)
2716 if (inquire->iolength != NULL)
2718 gfc_error ("IOLENGTH tag invalid in INQUIRE statement at %C");
2723 if (gfc_match_eos () != MATCH_YES)
2726 if (inquire->unit != NULL && inquire->file != NULL)
2728 gfc_error ("INQUIRE statement at %L cannot contain both FILE and"
2729 " UNIT specifiers", &loc);
2733 if (inquire->unit == NULL && inquire->file == NULL)
2735 gfc_error ("INQUIRE statement at %L requires either FILE or"
2736 " UNIT specifier", &loc);
2740 if (gfc_pure (NULL))
2742 gfc_error ("INQUIRE statement not allowed in PURE procedure at %C");
2746 new_st.op = EXEC_INQUIRE;
2747 new_st.ext.inquire = inquire;
2751 gfc_syntax_error (ST_INQUIRE);
2754 gfc_free_inquire (inquire);
2759 /* Resolve everything in a gfc_inquire structure. */
2762 gfc_resolve_inquire (gfc_inquire * inquire)
2765 RESOLVE_TAG (&tag_unit, inquire->unit);
2766 RESOLVE_TAG (&tag_file, inquire->file);
2767 RESOLVE_TAG (&tag_iomsg, inquire->iomsg);
2768 RESOLVE_TAG (&tag_iostat, inquire->iostat);
2769 RESOLVE_TAG (&tag_exist, inquire->exist);
2770 RESOLVE_TAG (&tag_opened, inquire->opened);
2771 RESOLVE_TAG (&tag_number, inquire->number);
2772 RESOLVE_TAG (&tag_named, inquire->named);
2773 RESOLVE_TAG (&tag_name, inquire->name);
2774 RESOLVE_TAG (&tag_s_access, inquire->access);
2775 RESOLVE_TAG (&tag_sequential, inquire->sequential);
2776 RESOLVE_TAG (&tag_direct, inquire->direct);
2777 RESOLVE_TAG (&tag_s_form, inquire->form);
2778 RESOLVE_TAG (&tag_formatted, inquire->formatted);
2779 RESOLVE_TAG (&tag_unformatted, inquire->unformatted);
2780 RESOLVE_TAG (&tag_s_recl, inquire->recl);
2781 RESOLVE_TAG (&tag_nextrec, inquire->nextrec);
2782 RESOLVE_TAG (&tag_s_blank, inquire->blank);
2783 RESOLVE_TAG (&tag_s_position, inquire->position);
2784 RESOLVE_TAG (&tag_s_action, inquire->action);
2785 RESOLVE_TAG (&tag_read, inquire->read);
2786 RESOLVE_TAG (&tag_write, inquire->write);
2787 RESOLVE_TAG (&tag_readwrite, inquire->readwrite);
2788 RESOLVE_TAG (&tag_s_delim, inquire->delim);
2789 RESOLVE_TAG (&tag_s_pad, inquire->pad);
2790 RESOLVE_TAG (&tag_iolength, inquire->iolength);
2791 RESOLVE_TAG (&tag_convert, inquire->convert);
2793 if (gfc_reference_st_label (inquire->err, ST_LABEL_TARGET) == FAILURE)