| /* Declaration statement matcher |
| Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, |
| Inc. |
| Contributed by Andy Vaught |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 2, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to the Free |
| Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. */ |
| |
| |
| #include "config.h" |
| #include "system.h" |
| #include "gfortran.h" |
| #include "match.h" |
| #include "parse.h" |
| |
| |
| /* This flag is set if an old-style length selector is matched |
| during a type-declaration statement. */ |
| |
| static int old_char_selector; |
| |
| /* When variables acquire types and attributes from a declaration |
| statement, they get them from the following static variables. The |
| first part of a declaration sets these variables and the second |
| part copies these into symbol structures. */ |
| |
| static gfc_typespec current_ts; |
| |
| static symbol_attribute current_attr; |
| static gfc_array_spec *current_as; |
| static int colon_seen; |
| |
| /* Initializer of the previous enumerator. */ |
| |
| static gfc_expr *last_initializer; |
| |
| /* History of all the enumerators is maintained, so that |
| kind values of all the enumerators could be updated depending |
| upon the maximum initialized value. */ |
| |
| typedef struct enumerator_history |
| { |
| gfc_symbol *sym; |
| gfc_expr *initializer; |
| struct enumerator_history *next; |
| } |
| enumerator_history; |
| |
| /* Header of enum history chain. */ |
| |
| static enumerator_history *enum_history = NULL; |
| |
| /* Pointer of enum history node containing largest initializer. */ |
| |
| static enumerator_history *max_enum = NULL; |
| |
| /* gfc_new_block points to the symbol of a newly matched block. */ |
| |
| gfc_symbol *gfc_new_block; |
| |
| |
| /********************* DATA statement subroutines *********************/ |
| |
| static bool in_match_data = false; |
| |
| bool |
| gfc_in_match_data (void) |
| { |
| return in_match_data; |
| } |
| |
| void |
| gfc_set_in_match_data (bool set_value) |
| { |
| in_match_data = set_value; |
| } |
| |
| /* Free a gfc_data_variable structure and everything beneath it. */ |
| |
| static void |
| free_variable (gfc_data_variable * p) |
| { |
| gfc_data_variable *q; |
| |
| for (; p; p = q) |
| { |
| q = p->next; |
| gfc_free_expr (p->expr); |
| gfc_free_iterator (&p->iter, 0); |
| free_variable (p->list); |
| |
| gfc_free (p); |
| } |
| } |
| |
| |
| /* Free a gfc_data_value structure and everything beneath it. */ |
| |
| static void |
| free_value (gfc_data_value * p) |
| { |
| gfc_data_value *q; |
| |
| for (; p; p = q) |
| { |
| q = p->next; |
| gfc_free_expr (p->expr); |
| gfc_free (p); |
| } |
| } |
| |
| |
| /* Free a list of gfc_data structures. */ |
| |
| void |
| gfc_free_data (gfc_data * p) |
| { |
| gfc_data *q; |
| |
| for (; p; p = q) |
| { |
| q = p->next; |
| |
| free_variable (p->var); |
| free_value (p->value); |
| |
| gfc_free (p); |
| } |
| } |
| |
| |
| static match var_element (gfc_data_variable *); |
| |
| /* Match a list of variables terminated by an iterator and a right |
| parenthesis. */ |
| |
| static match |
| var_list (gfc_data_variable * parent) |
| { |
| gfc_data_variable *tail, var; |
| match m; |
| |
| m = var_element (&var); |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| if (m == MATCH_NO) |
| goto syntax; |
| |
| tail = gfc_get_data_variable (); |
| *tail = var; |
| |
| parent->list = tail; |
| |
| for (;;) |
| { |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| |
| m = gfc_match_iterator (&parent->iter, 1); |
| if (m == MATCH_YES) |
| break; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| m = var_element (&var); |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| if (m == MATCH_NO) |
| goto syntax; |
| |
| tail->next = gfc_get_data_variable (); |
| tail = tail->next; |
| |
| *tail = var; |
| } |
| |
| if (gfc_match_char (')') != MATCH_YES) |
| goto syntax; |
| return MATCH_YES; |
| |
| syntax: |
| gfc_syntax_error (ST_DATA); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Match a single element in a data variable list, which can be a |
| variable-iterator list. */ |
| |
| static match |
| var_element (gfc_data_variable * new) |
| { |
| match m; |
| gfc_symbol *sym; |
| |
| memset (new, 0, sizeof (gfc_data_variable)); |
| |
| if (gfc_match_char ('(') == MATCH_YES) |
| return var_list (new); |
| |
| m = gfc_match_variable (&new->expr, 0); |
| if (m != MATCH_YES) |
| return m; |
| |
| sym = new->expr->symtree->n.sym; |
| |
| if (!sym->attr.function && gfc_current_ns->parent && gfc_current_ns->parent == sym->ns) |
| { |
| gfc_error ("Host associated variable '%s' may not be in the DATA " |
| "statement at %C.", sym->name); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_current_state () != COMP_BLOCK_DATA |
| && sym->attr.in_common |
| && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " |
| "common block variable '%s' in DATA statement at %C", |
| sym->name) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
| return MATCH_ERROR; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match the top-level list of data variables. */ |
| |
| static match |
| top_var_list (gfc_data * d) |
| { |
| gfc_data_variable var, *tail, *new; |
| match m; |
| |
| tail = NULL; |
| |
| for (;;) |
| { |
| m = var_element (&var); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| new = gfc_get_data_variable (); |
| *new = var; |
| |
| if (tail == NULL) |
| d->var = new; |
| else |
| tail->next = new; |
| |
| tail = new; |
| |
| if (gfc_match_char ('/') == MATCH_YES) |
| break; |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_syntax_error (ST_DATA); |
| return MATCH_ERROR; |
| } |
| |
| |
| static match |
| match_data_constant (gfc_expr ** result) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *sym; |
| gfc_expr *expr; |
| match m; |
| |
| m = gfc_match_literal_constant (&expr, 1); |
| if (m == MATCH_YES) |
| { |
| *result = expr; |
| return MATCH_YES; |
| } |
| |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| m = gfc_match_null (result); |
| if (m != MATCH_NO) |
| return m; |
| |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (gfc_find_symbol (name, NULL, 1, &sym)) |
| return MATCH_ERROR; |
| |
| if (sym == NULL |
| || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) |
| { |
| gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", |
| name); |
| return MATCH_ERROR; |
| } |
| else if (sym->attr.flavor == FL_DERIVED) |
| return gfc_match_structure_constructor (sym, result); |
| |
| *result = gfc_copy_expr (sym->value); |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a list of values in a DATA statement. The leading '/' has |
| already been seen at this point. */ |
| |
| static match |
| top_val_list (gfc_data * data) |
| { |
| gfc_data_value *new, *tail; |
| gfc_expr *expr; |
| const char *msg; |
| match m; |
| |
| tail = NULL; |
| |
| for (;;) |
| { |
| m = match_data_constant (&expr); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| new = gfc_get_data_value (); |
| |
| if (tail == NULL) |
| data->value = new; |
| else |
| tail->next = new; |
| |
| tail = new; |
| |
| if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) |
| { |
| tail->expr = expr; |
| tail->repeat = 1; |
| } |
| else |
| { |
| signed int tmp; |
| msg = gfc_extract_int (expr, &tmp); |
| gfc_free_expr (expr); |
| if (msg != NULL) |
| { |
| /* LLVM LOCAL begin */ |
| gfc_error ("%s", msg); |
| /* LLVM LOCAL end */ |
| return MATCH_ERROR; |
| } |
| tail->repeat = tmp; |
| |
| m = match_data_constant (&tail->expr); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_match_char ('/') == MATCH_YES) |
| break; |
| if (gfc_match_char (',') == MATCH_NO) |
| goto syntax; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_syntax_error (ST_DATA); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Matches an old style initialization. */ |
| |
| static match |
| match_old_style_init (const char *name) |
| { |
| match m; |
| gfc_symtree *st; |
| gfc_symbol *sym; |
| gfc_data *newdata; |
| |
| /* Set up data structure to hold initializers. */ |
| gfc_find_sym_tree (name, NULL, 0, &st); |
| sym = st->n.sym; |
| |
| newdata = gfc_get_data (); |
| newdata->var = gfc_get_data_variable (); |
| newdata->var->expr = gfc_get_variable_expr (st); |
| newdata->where = gfc_current_locus; |
| |
| /* Match initial value list. This also eats the terminal |
| '/'. */ |
| m = top_val_list (newdata); |
| if (m != MATCH_YES) |
| { |
| gfc_free (newdata); |
| return m; |
| } |
| |
| if (gfc_pure (NULL)) |
| { |
| gfc_error ("Initialization at %C is not allowed in a PURE procedure"); |
| gfc_free (newdata); |
| return MATCH_ERROR; |
| } |
| |
| /* Mark the variable as having appeared in a data statement. */ |
| if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) |
| { |
| gfc_free (newdata); |
| return MATCH_ERROR; |
| } |
| |
| /* Chain in namespace list of DATA initializers. */ |
| newdata->next = gfc_current_ns->data; |
| gfc_current_ns->data = newdata; |
| |
| return m; |
| } |
| |
| /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
| we are matching a DATA statement and are therefore issuing an error |
| if we encounter something unexpected, if not, we're trying to match |
| an old-style initialization expression of the form INTEGER I /2/. */ |
| |
| match |
| gfc_match_data (void) |
| { |
| gfc_data *new; |
| match m; |
| |
| gfc_set_in_match_data (true); |
| |
| for (;;) |
| { |
| new = gfc_get_data (); |
| new->where = gfc_current_locus; |
| |
| m = top_var_list (new); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| m = top_val_list (new); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| new->next = gfc_current_ns->data; |
| gfc_current_ns->data = new; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| break; |
| |
| gfc_match_char (','); /* Optional comma */ |
| } |
| |
| gfc_set_in_match_data (false); |
| |
| if (gfc_pure (NULL)) |
| { |
| gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); |
| return MATCH_ERROR; |
| } |
| |
| return MATCH_YES; |
| |
| cleanup: |
| gfc_set_in_match_data (false); |
| gfc_free_data (new); |
| return MATCH_ERROR; |
| } |
| |
| |
| /************************ Declaration statements *********************/ |
| |
| /* Match an intent specification. Since this can only happen after an |
| INTENT word, a legal intent-spec must follow. */ |
| |
| static sym_intent |
| match_intent_spec (void) |
| { |
| |
| if (gfc_match (" ( in out )") == MATCH_YES) |
| return INTENT_INOUT; |
| if (gfc_match (" ( in )") == MATCH_YES) |
| return INTENT_IN; |
| if (gfc_match (" ( out )") == MATCH_YES) |
| return INTENT_OUT; |
| |
| gfc_error ("Bad INTENT specification at %C"); |
| return INTENT_UNKNOWN; |
| } |
| |
| |
| /* Matches a character length specification, which is either a |
| specification expression or a '*'. */ |
| |
| static match |
| char_len_param_value (gfc_expr ** expr) |
| { |
| |
| if (gfc_match_char ('*') == MATCH_YES) |
| { |
| *expr = NULL; |
| return MATCH_YES; |
| } |
| |
| return gfc_match_expr (expr); |
| } |
| |
| |
| /* A character length is a '*' followed by a literal integer or a |
| char_len_param_value in parenthesis. */ |
| |
| static match |
| match_char_length (gfc_expr ** expr) |
| { |
| int length; |
| match m; |
| |
| m = gfc_match_char ('*'); |
| if (m != MATCH_YES) |
| return m; |
| |
| m = gfc_match_small_literal_int (&length, NULL); |
| if (m == MATCH_ERROR) |
| return m; |
| |
| if (m == MATCH_YES) |
| { |
| *expr = gfc_int_expr (length); |
| return m; |
| } |
| |
| if (gfc_match_char ('(') == MATCH_NO) |
| goto syntax; |
| |
| m = char_len_param_value (expr); |
| if (m == MATCH_ERROR) |
| return m; |
| if (m == MATCH_NO) |
| goto syntax; |
| |
| if (gfc_match_char (')') == MATCH_NO) |
| { |
| gfc_free_expr (*expr); |
| *expr = NULL; |
| goto syntax; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_error ("Syntax error in character length specification at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Special subroutine for finding a symbol. Check if the name is found |
| in the current name space. If not, and we're compiling a function or |
| subroutine and the parent compilation unit is an interface, then check |
| to see if the name we've been given is the name of the interface |
| (located in another namespace). */ |
| |
| static int |
| find_special (const char *name, gfc_symbol ** result) |
| { |
| gfc_state_data *s; |
| int i; |
| |
| i = gfc_get_symbol (name, NULL, result); |
| if (i==0) |
| goto end; |
| |
| if (gfc_current_state () != COMP_SUBROUTINE |
| && gfc_current_state () != COMP_FUNCTION) |
| goto end; |
| |
| s = gfc_state_stack->previous; |
| if (s == NULL) |
| goto end; |
| |
| if (s->state != COMP_INTERFACE) |
| goto end; |
| if (s->sym == NULL) |
| goto end; /* Nameless interface */ |
| |
| if (strcmp (name, s->sym->name) == 0) |
| { |
| *result = s->sym; |
| return 0; |
| } |
| |
| end: |
| return i; |
| } |
| |
| |
| /* Special subroutine for getting a symbol node associated with a |
| procedure name, used in SUBROUTINE and FUNCTION statements. The |
| symbol is created in the parent using with symtree node in the |
| child unit pointing to the symbol. If the current namespace has no |
| parent, then the symbol is just created in the current unit. */ |
| |
| static int |
| get_proc_name (const char *name, gfc_symbol ** result, |
| bool module_fcn_entry) |
| { |
| gfc_symtree *st; |
| gfc_symbol *sym; |
| int rc; |
| |
| /* Module functions have to be left in their own namespace because |
| they have potentially (almost certainly!) already been referenced. |
| In this sense, they are rather like external functions. This is |
| fixed up in resolve.c(resolve_entries), where the symbol name- |
| space is set to point to the master function, so that the fake |
| result mechanism can work. */ |
| if (module_fcn_entry) |
| rc = gfc_get_symbol (name, NULL, result); |
| else |
| rc = gfc_get_symbol (name, gfc_current_ns->parent, result); |
| |
| sym = *result; |
| |
| if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
| { |
| /* Trap another encompassed procedure with the same name. All |
| these conditions are necessary to avoid picking up an entry |
| whose name clashes with that of the encompassing procedure; |
| this is handled using gsymbols to register unique,globally |
| accessible names. */ |
| if (sym->attr.flavor != 0 |
| && sym->attr.proc != 0 |
| && (sym->attr.subroutine || sym->attr.function) |
| && sym->attr.if_source != IFSRC_UNKNOWN) |
| gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
| name, &sym->declared_at); |
| |
| /* Trap declarations of attributes in encompassing scope. The |
| signature for this is that ts.kind is set. Legitimate |
| references only set ts.type. */ |
| if (sym->ts.kind != 0 |
| && !sym->attr.implicit_type |
| && sym->attr.proc == 0 |
| && gfc_current_ns->parent != NULL |
| && sym->attr.access == 0 |
| && !module_fcn_entry) |
| gfc_error_now ("Procedure '%s' at %C has an explicit interface" |
| " and must not have attributes declared at %L", |
| name, &sym->declared_at); |
| } |
| |
| if (gfc_current_ns->parent == NULL || *result == NULL) |
| return rc; |
| |
| /* Module function entries will already have a symtree in |
| the current namespace but will need one at module level. */ |
| if (module_fcn_entry) |
| st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); |
| else |
| st = gfc_new_symtree (&gfc_current_ns->sym_root, name); |
| |
| st->n.sym = sym; |
| sym->refs++; |
| |
| /* See if the procedure should be a module procedure */ |
| |
| if (((sym->ns->proc_name != NULL |
| && sym->ns->proc_name->attr.flavor == FL_MODULE |
| && sym->attr.proc != PROC_MODULE) || module_fcn_entry) |
| && gfc_add_procedure (&sym->attr, PROC_MODULE, |
| sym->name, NULL) == FAILURE) |
| rc = 2; |
| |
| return rc; |
| } |
| |
| |
| /* Function called by variable_decl() that adds a name to the symbol |
| table. */ |
| |
| static try |
| build_sym (const char *name, gfc_charlen * cl, |
| gfc_array_spec ** as, locus * var_locus) |
| { |
| symbol_attribute attr; |
| gfc_symbol *sym; |
| |
| /* if (find_special (name, &sym)) */ |
| if (gfc_get_symbol (name, NULL, &sym)) |
| return FAILURE; |
| |
| /* Start updating the symbol table. Add basic type attribute |
| if present. */ |
| if (current_ts.type != BT_UNKNOWN |
| &&(sym->attr.implicit_type == 0 |
| || !gfc_compare_types (&sym->ts, ¤t_ts)) |
| && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
| return FAILURE; |
| |
| if (sym->ts.type == BT_CHARACTER) |
| sym->ts.cl = cl; |
| |
| /* Add dimension attribute if present. */ |
| if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) |
| return FAILURE; |
| *as = NULL; |
| |
| /* Add attribute to symbol. The copy is so that we can reset the |
| dimension attribute. */ |
| attr = current_attr; |
| attr.dimension = 0; |
| |
| if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) |
| return FAILURE; |
| |
| return SUCCESS; |
| } |
| |
| /* Set character constant to the given length. The constant will be padded or |
| truncated. */ |
| |
| void |
| gfc_set_constant_character_len (int len, gfc_expr * expr, bool array) |
| { |
| char * s; |
| int slen; |
| |
| gcc_assert (expr->expr_type == EXPR_CONSTANT); |
| gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); |
| |
| slen = expr->value.character.length; |
| if (len != slen) |
| { |
| s = gfc_getmem (len + 1); |
| memcpy (s, expr->value.character.string, MIN (len, slen)); |
| if (len > slen) |
| memset (&s[slen], ' ', len - slen); |
| |
| if (gfc_option.warn_character_truncation && slen > len) |
| gfc_warning_now ("CHARACTER expression at %L is being truncated " |
| "(%d/%d)", &expr->where, slen, len); |
| |
| /* Apply the standard by 'hand' otherwise it gets cleared for |
| initializers. */ |
| if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) |
| gfc_error_now ("The CHARACTER elements of the array constructor " |
| "at %L must have the same length (%d/%d)", |
| &expr->where, slen, len); |
| |
| s[len] = '\0'; |
| gfc_free (expr->value.character.string); |
| expr->value.character.string = s; |
| expr->value.character.length = len; |
| } |
| } |
| |
| |
| /* Function to create and update the enumerator history |
| using the information passed as arguments. |
| Pointer "max_enum" is also updated, to point to |
| enum history node containing largest initializer. |
| |
| SYM points to the symbol node of enumerator. |
| INIT points to its enumerator value. */ |
| |
| static void |
| create_enum_history (gfc_symbol *sym, gfc_expr *init) |
| { |
| enumerator_history *new_enum_history; |
| gcc_assert (sym != NULL && init != NULL); |
| |
| new_enum_history = gfc_getmem (sizeof (enumerator_history)); |
| |
| new_enum_history->sym = sym; |
| new_enum_history->initializer = init; |
| new_enum_history->next = NULL; |
| |
| if (enum_history == NULL) |
| { |
| enum_history = new_enum_history; |
| max_enum = enum_history; |
| } |
| else |
| { |
| new_enum_history->next = enum_history; |
| enum_history = new_enum_history; |
| |
| if (mpz_cmp (max_enum->initializer->value.integer, |
| new_enum_history->initializer->value.integer) < 0) |
| max_enum = new_enum_history; |
| } |
| } |
| |
| |
| /* Function to free enum kind history. */ |
| |
| void |
| gfc_free_enum_history (void) |
| { |
| enumerator_history *current = enum_history; |
| enumerator_history *next; |
| |
| while (current != NULL) |
| { |
| next = current->next; |
| gfc_free (current); |
| current = next; |
| } |
| max_enum = NULL; |
| enum_history = NULL; |
| } |
| |
| |
| /* Function called by variable_decl() that adds an initialization |
| expression to a symbol. */ |
| |
| static try |
| add_init_expr_to_sym (const char *name, gfc_expr ** initp, |
| locus * var_locus) |
| { |
| symbol_attribute attr; |
| gfc_symbol *sym; |
| gfc_expr *init; |
| |
| init = *initp; |
| if (find_special (name, &sym)) |
| return FAILURE; |
| |
| attr = sym->attr; |
| |
| /* If this symbol is confirming an implicit parameter type, |
| then an initialization expression is not allowed. */ |
| if (attr.flavor == FL_PARAMETER |
| && sym->value != NULL |
| && *initp != NULL) |
| { |
| gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", |
| sym->name); |
| return FAILURE; |
| } |
| |
| if (attr.in_common |
| && !attr.data |
| && *initp != NULL) |
| { |
| gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", |
| sym->name); |
| return FAILURE; |
| } |
| |
| if (init == NULL) |
| { |
| /* An initializer is required for PARAMETER declarations. */ |
| if (attr.flavor == FL_PARAMETER) |
| { |
| gfc_error ("PARAMETER at %L is missing an initializer", var_locus); |
| return FAILURE; |
| } |
| } |
| else |
| { |
| /* If a variable appears in a DATA block, it cannot have an |
| initializer. */ |
| if (sym->attr.data) |
| { |
| gfc_error |
| ("Variable '%s' at %C with an initializer already appears " |
| "in a DATA statement", sym->name); |
| return FAILURE; |
| } |
| |
| /* Check if the assignment can happen. This has to be put off |
| until later for a derived type variable. */ |
| if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
| && gfc_check_assign_symbol (sym, init) == FAILURE) |
| return FAILURE; |
| |
| if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
| { |
| /* Update symbol character length according initializer. */ |
| if (sym->ts.cl->length == NULL) |
| { |
| /* If there are multiple CHARACTER variables declared on |
| the same line, we don't want them to share the same |
| length. */ |
| sym->ts.cl = gfc_get_charlen (); |
| sym->ts.cl->next = gfc_current_ns->cl_list; |
| gfc_current_ns->cl_list = sym->ts.cl; |
| |
| if (sym->attr.flavor == FL_PARAMETER |
| && init->expr_type == EXPR_ARRAY) |
| sym->ts.cl->length = gfc_copy_expr (init->ts.cl->length); |
| } |
| /* Update initializer character length according symbol. */ |
| else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) |
| { |
| int len = mpz_get_si (sym->ts.cl->length->value.integer); |
| gfc_constructor * p; |
| |
| if (init->expr_type == EXPR_CONSTANT) |
| gfc_set_constant_character_len (len, init, false); |
| else if (init->expr_type == EXPR_ARRAY) |
| { |
| /* Build a new charlen to prevent simplification from |
| deleting the length before it is resolved. */ |
| init->ts.cl = gfc_get_charlen (); |
| init->ts.cl->next = gfc_current_ns->cl_list; |
| gfc_current_ns->cl_list = sym->ts.cl; |
| init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
| |
| for (p = init->value.constructor; p; p = p->next) |
| gfc_set_constant_character_len (len, p->expr, false); |
| } |
| } |
| } |
| |
| /* Add initializer. Make sure we keep the ranks sane. */ |
| if (sym->attr.dimension && init->rank == 0) |
| init->rank = sym->as->rank; |
| |
| sym->value = init; |
| *initp = NULL; |
| } |
| |
| return SUCCESS; |
| } |
| |
| |
| /* Function called by variable_decl() that adds a name to a structure |
| being built. */ |
| |
| static try |
| build_struct (const char *name, gfc_charlen * cl, gfc_expr ** init, |
| gfc_array_spec ** as) |
| { |
| gfc_component *c; |
| |
| /* If the current symbol is of the same derived type that we're |
| constructing, it must have the pointer attribute. */ |
| if (current_ts.type == BT_DERIVED |
| && current_ts.derived == gfc_current_block () |
| && current_attr.pointer == 0) |
| { |
| gfc_error ("Component at %C must have the POINTER attribute"); |
| return FAILURE; |
| } |
| |
| if (gfc_current_block ()->attr.pointer |
| && (*as)->rank != 0) |
| { |
| if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) |
| { |
| gfc_error ("Array component of structure at %C must have explicit " |
| "or deferred shape"); |
| return FAILURE; |
| } |
| } |
| |
| if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) |
| return FAILURE; |
| |
| c->ts = current_ts; |
| c->ts.cl = cl; |
| gfc_set_component_attr (c, ¤t_attr); |
| |
| c->initializer = *init; |
| *init = NULL; |
| |
| c->as = *as; |
| if (c->as != NULL) |
| c->dimension = 1; |
| *as = NULL; |
| |
| /* Check array components. */ |
| if (!c->dimension) |
| { |
| if (c->allocatable) |
| { |
| gfc_error ("Allocatable component at %C must be an array"); |
| return FAILURE; |
| } |
| else |
| return SUCCESS; |
| } |
| |
| if (c->pointer) |
| { |
| if (c->as->type != AS_DEFERRED) |
| { |
| gfc_error ("Pointer array component of structure at %C must have a " |
| "deferred shape"); |
| return FAILURE; |
| } |
| } |
| else if (c->allocatable) |
| { |
| if (c->as->type != AS_DEFERRED) |
| { |
| gfc_error ("Allocatable component of structure at %C must have a " |
| "deferred shape"); |
| return FAILURE; |
| } |
| } |
| else |
| { |
| if (c->as->type != AS_EXPLICIT) |
| { |
| gfc_error |
| ("Array component of structure at %C must have an explicit " |
| "shape"); |
| return FAILURE; |
| } |
| } |
| |
| return SUCCESS; |
| } |
| |
| |
| /* Match a 'NULL()', and possibly take care of some side effects. */ |
| |
| match |
| gfc_match_null (gfc_expr ** result) |
| { |
| gfc_symbol *sym; |
| gfc_expr *e; |
| match m; |
| |
| m = gfc_match (" null ( )"); |
| if (m != MATCH_YES) |
| return m; |
| |
| /* The NULL symbol now has to be/become an intrinsic function. */ |
| if (gfc_get_symbol ("null", NULL, &sym)) |
| { |
| gfc_error ("NULL() initialization at %C is ambiguous"); |
| return MATCH_ERROR; |
| } |
| |
| gfc_intrinsic_symbol (sym); |
| |
| if (sym->attr.proc != PROC_INTRINSIC |
| && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
| sym->name, NULL) == FAILURE |
| || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) |
| return MATCH_ERROR; |
| |
| e = gfc_get_expr (); |
| e->where = gfc_current_locus; |
| e->expr_type = EXPR_NULL; |
| e->ts.type = BT_UNKNOWN; |
| |
| *result = e; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a variable name with an optional initializer. When this |
| subroutine is called, a variable is expected to be parsed next. |
| Depending on what is happening at the moment, updates either the |
| symbol table or the current interface. */ |
| |
| static match |
| variable_decl (int elem) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_expr *initializer, *char_len; |
| gfc_array_spec *as; |
| gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
| gfc_charlen *cl; |
| locus var_locus; |
| match m; |
| try t; |
| gfc_symbol *sym; |
| locus old_locus; |
| |
| initializer = NULL; |
| as = NULL; |
| cp_as = NULL; |
| old_locus = gfc_current_locus; |
| |
| /* When we get here, we've just matched a list of attributes and |
| maybe a type and a double colon. The next thing we expect to see |
| is the name of the symbol. */ |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| var_locus = gfc_current_locus; |
| |
| /* Now we could see the optional array spec. or character length. */ |
| m = gfc_match_array_spec (&as); |
| if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
| cp_as = gfc_copy_array_spec (as); |
| else if (m == MATCH_ERROR) |
| goto cleanup; |
| |
| if (m == MATCH_NO) |
| as = gfc_copy_array_spec (current_as); |
| |
| char_len = NULL; |
| cl = NULL; |
| |
| if (current_ts.type == BT_CHARACTER) |
| { |
| switch (match_char_length (&char_len)) |
| { |
| case MATCH_YES: |
| cl = gfc_get_charlen (); |
| cl->next = gfc_current_ns->cl_list; |
| gfc_current_ns->cl_list = cl; |
| |
| cl->length = char_len; |
| break; |
| |
| /* Non-constant lengths need to be copied after the first |
| element. */ |
| case MATCH_NO: |
| if (elem > 1 && current_ts.cl->length |
| && current_ts.cl->length->expr_type != EXPR_CONSTANT) |
| { |
| cl = gfc_get_charlen (); |
| cl->next = gfc_current_ns->cl_list; |
| gfc_current_ns->cl_list = cl; |
| cl->length = gfc_copy_expr (current_ts.cl->length); |
| } |
| else |
| cl = current_ts.cl; |
| |
| break; |
| |
| case MATCH_ERROR: |
| goto cleanup; |
| } |
| } |
| |
| /* If this symbol has already shown up in a Cray Pointer declaration, |
| then we want to set the type & bail out. */ |
| if (gfc_option.flag_cray_pointer) |
| { |
| gfc_find_symbol (name, gfc_current_ns, 1, &sym); |
| if (sym != NULL && sym->attr.cray_pointee) |
| { |
| sym->ts.type = current_ts.type; |
| sym->ts.kind = current_ts.kind; |
| sym->ts.cl = cl; |
| sym->ts.derived = current_ts.derived; |
| m = MATCH_YES; |
| |
| /* Check to see if we have an array specification. */ |
| if (cp_as != NULL) |
| { |
| if (sym->as != NULL) |
| { |
| gfc_error ("Duplicate array spec for Cray pointee at %C."); |
| gfc_free_array_spec (cp_as); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| else |
| { |
| if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) |
| gfc_internal_error ("Couldn't set pointee array spec."); |
| |
| /* Fix the array spec. */ |
| m = gfc_mod_pointee_as (sym->as); |
| if (m == MATCH_ERROR) |
| goto cleanup; |
| } |
| } |
| goto cleanup; |
| } |
| else |
| { |
| gfc_free_array_spec (cp_as); |
| } |
| } |
| |
| |
| /* OK, we've successfully matched the declaration. Now put the |
| symbol in the current namespace, because it might be used in the |
| optional initialization expression for this symbol, e.g. this is |
| perfectly legal: |
| |
| integer, parameter :: i = huge(i) |
| |
| This is only true for parameters or variables of a basic type. |
| For components of derived types, it is not true, so we don't |
| create a symbol for those yet. If we fail to create the symbol, |
| bail out. */ |
| if (gfc_current_state () != COMP_DERIVED |
| && build_sym (name, cl, &as, &var_locus) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| /* An interface body specifies all of the procedure's |
| characteristics and these shall be consistent with those |
| specified in the procedure definition, except that the interface |
| may specify a procedure that is not pure if the procedure is |
| defined to be pure(12.3.2). */ |
| if (current_ts.type == BT_DERIVED |
| && gfc_current_ns->proc_name |
| && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY |
| && current_ts.derived->ns != gfc_current_ns) |
| { |
| gfc_error ("the type of '%s' at %C has not been declared within the " |
| "interface", name); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| /* In functions that have a RESULT variable defined, the function |
| name always refers to function calls. Therefore, the name is |
| not allowed to appear in specification statements. */ |
| if (gfc_current_state () == COMP_FUNCTION |
| && gfc_current_block () != NULL |
| && gfc_current_block ()->result != NULL |
| && gfc_current_block ()->result != gfc_current_block () |
| && strcmp (gfc_current_block ()->name, name) == 0) |
| { |
| gfc_error ("Function name '%s' not allowed at %C", name); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| /* We allow old-style initializations of the form |
| integer i /2/, j(4) /3*3, 1/ |
| (if no colon has been seen). These are different from data |
| statements in that initializers are only allowed to apply to the |
| variable immediately preceding, i.e. |
| integer i, j /1, 2/ |
| is not allowed. Therefore we have to do some work manually, that |
| could otherwise be left to the matchers for DATA statements. */ |
| |
| if (!colon_seen && gfc_match (" /") == MATCH_YES) |
| { |
| if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " |
| "initialization at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| return match_old_style_init (name); |
| } |
| |
| /* The double colon must be present in order to have initializers. |
| Otherwise the statement is ambiguous with an assignment statement. */ |
| if (colon_seen) |
| { |
| if (gfc_match (" =>") == MATCH_YES) |
| { |
| |
| if (!current_attr.pointer) |
| { |
| gfc_error ("Initialization at %C isn't for a pointer variable"); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| m = gfc_match_null (&initializer); |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Pointer initialization requires a NULL() at %C"); |
| m = MATCH_ERROR; |
| } |
| |
| if (gfc_pure (NULL)) |
| { |
| gfc_error |
| ("Initialization of pointer at %C is not allowed in a " |
| "PURE procedure"); |
| m = MATCH_ERROR; |
| } |
| |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| } |
| else if (gfc_match_char ('=') == MATCH_YES) |
| { |
| if (current_attr.pointer) |
| { |
| gfc_error |
| ("Pointer initialization at %C requires '=>', not '='"); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| m = gfc_match_init_expr (&initializer); |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Expected an initialization expression at %C"); |
| m = MATCH_ERROR; |
| } |
| |
| if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) |
| { |
| gfc_error |
| ("Initialization of variable at %C is not allowed in a " |
| "PURE procedure"); |
| m = MATCH_ERROR; |
| } |
| |
| if (m != MATCH_YES) |
| goto cleanup; |
| } |
| } |
| |
| if (initializer != NULL && current_attr.allocatable |
| && gfc_current_state () == COMP_DERIVED) |
| { |
| gfc_error ("Initialization of allocatable component at %C is not allowed"); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| /* Add the initializer. Note that it is fine if initializer is |
| NULL here, because we sometimes also need to check if a |
| declaration *must* have an initialization expression. */ |
| if (gfc_current_state () != COMP_DERIVED) |
| t = add_init_expr_to_sym (name, &initializer, &var_locus); |
| else |
| { |
| if (current_ts.type == BT_DERIVED |
| && !current_attr.pointer |
| && !initializer) |
| initializer = gfc_default_initializer (¤t_ts); |
| t = build_struct (name, cl, &initializer, &as); |
| } |
| |
| m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; |
| |
| cleanup: |
| /* Free stuff up and return. */ |
| gfc_free_expr (initializer); |
| gfc_free_array_spec (as); |
| |
| return m; |
| } |
| |
| |
| /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
| This assumes that the byte size is equal to the kind number for |
| non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ |
| |
| match |
| gfc_match_old_kind_spec (gfc_typespec * ts) |
| { |
| match m; |
| int original_kind; |
| |
| if (gfc_match_char ('*') != MATCH_YES) |
| return MATCH_NO; |
| |
| m = gfc_match_small_literal_int (&ts->kind, NULL); |
| if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| original_kind = ts->kind; |
| |
| /* Massage the kind numbers for complex types. */ |
| if (ts->type == BT_COMPLEX) |
| { |
| if (ts->kind % 2) |
| { |
| gfc_error ("Old-style type declaration %s*%d not supported at %C", |
| gfc_basic_typename (ts->type), original_kind); |
| return MATCH_ERROR; |
| } |
| ts->kind /= 2; |
| } |
| |
| if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
| { |
| gfc_error ("Old-style type declaration %s*%d not supported at %C", |
| gfc_basic_typename (ts->type), original_kind); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
| gfc_basic_typename (ts->type), original_kind) == FAILURE) |
| return MATCH_ERROR; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a kind specification. Since kinds are generally optional, we |
| usually return MATCH_NO if something goes wrong. If a "kind=" |
| string is found, then we know we have an error. */ |
| |
| match |
| gfc_match_kind_spec (gfc_typespec * ts) |
| { |
| locus where; |
| gfc_expr *e; |
| match m, n; |
| const char *msg; |
| |
| m = MATCH_NO; |
| e = NULL; |
| |
| where = gfc_current_locus; |
| |
| if (gfc_match_char ('(') == MATCH_NO) |
| return MATCH_NO; |
| |
| /* Also gobbles optional text. */ |
| if (gfc_match (" kind = ") == MATCH_YES) |
| m = MATCH_ERROR; |
| |
| n = gfc_match_init_expr (&e); |
| if (n == MATCH_NO) |
| gfc_error ("Expected initialization expression at %C"); |
| if (n != MATCH_YES) |
| return MATCH_ERROR; |
| |
| if (e->rank != 0) |
| { |
| gfc_error ("Expected scalar initialization expression at %C"); |
| m = MATCH_ERROR; |
| goto no_match; |
| } |
| |
| msg = gfc_extract_int (e, &ts->kind); |
| if (msg != NULL) |
| { |
| /* LLVM LOCAL begin */ |
| gfc_error ("%s", msg); |
| /* LLVM LOCAL end */ |
| m = MATCH_ERROR; |
| goto no_match; |
| } |
| |
| gfc_free_expr (e); |
| e = NULL; |
| |
| if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
| { |
| gfc_error ("Kind %d not supported for type %s at %C", ts->kind, |
| gfc_basic_typename (ts->type)); |
| |
| m = MATCH_ERROR; |
| goto no_match; |
| } |
| |
| if (gfc_match_char (')') != MATCH_YES) |
| { |
| gfc_error ("Missing right paren at %C"); |
| goto no_match; |
| } |
| |
| return MATCH_YES; |
| |
| no_match: |
| gfc_free_expr (e); |
| gfc_current_locus = where; |
| return m; |
| } |
| |
| |
| /* Match the various kind/length specifications in a CHARACTER |
| declaration. We don't return MATCH_NO. */ |
| |
| static match |
| match_char_spec (gfc_typespec * ts) |
| { |
| int i, kind, seen_length; |
| gfc_charlen *cl; |
| gfc_expr *len; |
| match m; |
| |
| kind = gfc_default_character_kind; |
| len = NULL; |
| seen_length = 0; |
| |
| /* Try the old-style specification first. */ |
| old_char_selector = 0; |
| |
| m = match_char_length (&len); |
| if (m != MATCH_NO) |
| { |
| if (m == MATCH_YES) |
| old_char_selector = 1; |
| seen_length = 1; |
| goto done; |
| } |
| |
| m = gfc_match_char ('('); |
| if (m != MATCH_YES) |
| { |
| m = MATCH_YES; /* character without length is a single char */ |
| goto done; |
| } |
| |
| /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ) */ |
| if (gfc_match (" kind =") == MATCH_YES) |
| { |
| m = gfc_match_small_int (&kind); |
| if (m == MATCH_ERROR) |
| goto done; |
| if (m == MATCH_NO) |
| goto syntax; |
| |
| if (gfc_match (" , len =") == MATCH_NO) |
| goto rparen; |
| |
| m = char_len_param_value (&len); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| goto done; |
| seen_length = 1; |
| |
| goto rparen; |
| } |
| |
| /* Try to match ( LEN = <len-param> ) or ( LEN = <len-param>, KIND = <int> ) */ |
| if (gfc_match (" len =") == MATCH_YES) |
| { |
| m = char_len_param_value (&len); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| goto done; |
| seen_length = 1; |
| |
| if (gfc_match_char (')') == MATCH_YES) |
| goto done; |
| |
| if (gfc_match (" , kind =") != MATCH_YES) |
| goto syntax; |
| |
| gfc_match_small_int (&kind); |
| |
| if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
| { |
| gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); |
| return MATCH_YES; |
| } |
| |
| goto rparen; |
| } |
| |
| /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ) */ |
| m = char_len_param_value (&len); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| goto done; |
| seen_length = 1; |
| |
| m = gfc_match_char (')'); |
| if (m == MATCH_YES) |
| goto done; |
| |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| |
| gfc_match (" kind ="); /* Gobble optional text */ |
| |
| m = gfc_match_small_int (&kind); |
| if (m == MATCH_ERROR) |
| goto done; |
| if (m == MATCH_NO) |
| goto syntax; |
| |
| rparen: |
| /* Require a right-paren at this point. */ |
| m = gfc_match_char (')'); |
| if (m == MATCH_YES) |
| goto done; |
| |
| syntax: |
| gfc_error ("Syntax error in CHARACTER declaration at %C"); |
| m = MATCH_ERROR; |
| |
| done: |
| if (m == MATCH_YES && gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
| { |
| gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); |
| m = MATCH_ERROR; |
| } |
| |
| if (m != MATCH_YES) |
| { |
| gfc_free_expr (len); |
| return m; |
| } |
| |
| /* Do some final massaging of the length values. */ |
| cl = gfc_get_charlen (); |
| cl->next = gfc_current_ns->cl_list; |
| gfc_current_ns->cl_list = cl; |
| |
| if (seen_length == 0) |
| cl->length = gfc_int_expr (1); |
| else |
| { |
| if (len == NULL || gfc_extract_int (len, &i) != NULL || i >= 0) |
| cl->length = len; |
| else |
| { |
| gfc_free_expr (len); |
| cl->length = gfc_int_expr (0); |
| } |
| } |
| |
| ts->cl = cl; |
| ts->kind = kind; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Matches a type specification. If successful, sets the ts structure |
| to the matched specification. This is necessary for FUNCTION and |
| IMPLICIT statements. |
| |
| If implicit_flag is nonzero, then we don't check for the optional |
| kind specification. Not doing so is needed for matching an IMPLICIT |
| statement correctly. */ |
| |
| static match |
| match_type_spec (gfc_typespec * ts, int implicit_flag) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *sym; |
| match m; |
| int c; |
| |
| gfc_clear_ts (ts); |
| |
| if (gfc_match (" byte") == MATCH_YES) |
| { |
| if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) |
| { |
| gfc_error ("BYTE type used at %C " |
| "is not available on the target machine"); |
| return MATCH_ERROR; |
| } |
| |
| ts->type = BT_INTEGER; |
| ts->kind = 1; |
| return MATCH_YES; |
| } |
| |
| if (gfc_match (" integer") == MATCH_YES) |
| { |
| ts->type = BT_INTEGER; |
| ts->kind = gfc_default_integer_kind; |
| goto get_kind; |
| } |
| |
| if (gfc_match (" character") == MATCH_YES) |
| { |
| ts->type = BT_CHARACTER; |
| if (implicit_flag == 0) |
| return match_char_spec (ts); |
| else |
| return MATCH_YES; |
| } |
| |
| if (gfc_match (" real") == MATCH_YES) |
| { |
| ts->type = BT_REAL; |
| ts->kind = gfc_default_real_kind; |
| goto get_kind; |
| } |
| |
| if (gfc_match (" double precision") == MATCH_YES) |
| { |
| ts->type = BT_REAL; |
| ts->kind = gfc_default_double_kind; |
| return MATCH_YES; |
| } |
| |
| if (gfc_match (" complex") == MATCH_YES) |
| { |
| ts->type = BT_COMPLEX; |
| ts->kind = gfc_default_complex_kind; |
| goto get_kind; |
| } |
| |
| if (gfc_match (" double complex") == MATCH_YES) |
| { |
| if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
| "conform to the Fortran 95 standard") == FAILURE) |
| return MATCH_ERROR; |
| |
| ts->type = BT_COMPLEX; |
| ts->kind = gfc_default_double_kind; |
| return MATCH_YES; |
| } |
| |
| if (gfc_match (" logical") == MATCH_YES) |
| { |
| ts->type = BT_LOGICAL; |
| ts->kind = gfc_default_logical_kind; |
| goto get_kind; |
| } |
| |
| m = gfc_match (" type ( %n )", name); |
| if (m != MATCH_YES) |
| return m; |
| |
| /* Search for the name but allow the components to be defined later. */ |
| if (gfc_get_ha_symbol (name, &sym)) |
| { |
| gfc_error ("Type name '%s' at %C is ambiguous", name); |
| return MATCH_ERROR; |
| } |
| |
| if (sym->attr.flavor != FL_DERIVED |
| && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| ts->type = BT_DERIVED; |
| ts->kind = 0; |
| ts->derived = sym; |
| |
| return MATCH_YES; |
| |
| get_kind: |
| /* For all types except double, derived and character, look for an |
| optional kind specifier. MATCH_NO is actually OK at this point. */ |
| if (implicit_flag == 1) |
| return MATCH_YES; |
| |
| if (gfc_current_form == FORM_FREE) |
| { |
| c = gfc_peek_char(); |
| if (!gfc_is_whitespace(c) && c != '*' && c != '(' |
| && c != ':' && c != ',') |
| return MATCH_NO; |
| } |
| |
| m = gfc_match_kind_spec (ts); |
| if (m == MATCH_NO && ts->type != BT_CHARACTER) |
| m = gfc_match_old_kind_spec (ts); |
| |
| if (m == MATCH_NO) |
| m = MATCH_YES; /* No kind specifier found. */ |
| |
| return m; |
| } |
| |
| |
| /* Match an IMPLICIT NONE statement. Actually, this statement is |
| already matched in parse.c, or we would not end up here in the |
| first place. So the only thing we need to check, is if there is |
| trailing garbage. If not, the match is successful. */ |
| |
| match |
| gfc_match_implicit_none (void) |
| { |
| |
| return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
| } |
| |
| |
| /* Match the letter range(s) of an IMPLICIT statement. */ |
| |
| static match |
| match_implicit_range (void) |
| { |
| int c, c1, c2, inner; |
| locus cur_loc; |
| |
| cur_loc = gfc_current_locus; |
| |
| gfc_gobble_whitespace (); |
| c = gfc_next_char (); |
| if (c != '(') |
| { |
| gfc_error ("Missing character range in IMPLICIT at %C"); |
| goto bad; |
| } |
| |
| inner = 1; |
| while (inner) |
| { |
| gfc_gobble_whitespace (); |
| c1 = gfc_next_char (); |
| if (!ISALPHA (c1)) |
| goto bad; |
| |
| gfc_gobble_whitespace (); |
| c = gfc_next_char (); |
| |
| switch (c) |
| { |
| case ')': |
| inner = 0; /* Fall through */ |
| |
| case ',': |
| c2 = c1; |
| break; |
| |
| case '-': |
| gfc_gobble_whitespace (); |
| c2 = gfc_next_char (); |
| if (!ISALPHA (c2)) |
| goto bad; |
| |
| gfc_gobble_whitespace (); |
| c = gfc_next_char (); |
| |
| if ((c != ',') && (c != ')')) |
| goto bad; |
| if (c == ')') |
| inner = 0; |
| |
| break; |
| |
| default: |
| goto bad; |
| } |
| |
| if (c1 > c2) |
| { |
| gfc_error ("Letters must be in alphabetic order in " |
| "IMPLICIT statement at %C"); |
| goto bad; |
| } |
| |
| /* See if we can add the newly matched range to the pending |
| implicits from this IMPLICIT statement. We do not check for |
| conflicts with whatever earlier IMPLICIT statements may have |
| set. This is done when we've successfully finished matching |
| the current one. */ |
| if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
| goto bad; |
| } |
| |
| return MATCH_YES; |
| |
| bad: |
| gfc_syntax_error (ST_IMPLICIT); |
| |
| gfc_current_locus = cur_loc; |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Match an IMPLICIT statement, storing the types for |
| gfc_set_implicit() if the statement is accepted by the parser. |
| There is a strange looking, but legal syntactic construction |
| possible. It looks like: |
| |
| IMPLICIT INTEGER (a-b) (c-d) |
| |
| This is legal if "a-b" is a constant expression that happens to |
| equal one of the legal kinds for integers. The real problem |
| happens with an implicit specification that looks like: |
| |
| IMPLICIT INTEGER (a-b) |
| |
| In this case, a typespec matcher that is "greedy" (as most of the |
| matchers are) gobbles the character range as a kindspec, leaving |
| nothing left. We therefore have to go a bit more slowly in the |
| matching process by inhibiting the kindspec checking during |
| typespec matching and checking for a kind later. */ |
| |
| match |
| gfc_match_implicit (void) |
| { |
| gfc_typespec ts; |
| locus cur_loc; |
| int c; |
| match m; |
| |
| /* We don't allow empty implicit statements. */ |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| gfc_error ("Empty IMPLICIT statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| do |
| { |
| /* First cleanup. */ |
| gfc_clear_new_implicit (); |
| |
| /* A basic type is mandatory here. */ |
| m = match_type_spec (&ts, 1); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_NO) |
| goto syntax; |
| |
| cur_loc = gfc_current_locus; |
| m = match_implicit_range (); |
| |
| if (m == MATCH_YES) |
| { |
| /* We may have <TYPE> (<RANGE>). */ |
| gfc_gobble_whitespace (); |
| c = gfc_next_char (); |
| if ((c == '\n') || (c == ',')) |
| { |
| /* Check for CHARACTER with no length parameter. */ |
| if (ts.type == BT_CHARACTER && !ts.cl) |
| { |
| ts.kind = gfc_default_character_kind; |
| ts.cl = gfc_get_charlen (); |
| ts.cl->next = gfc_current_ns->cl_list; |
| gfc_current_ns->cl_list = ts.cl; |
| ts.cl->length = gfc_int_expr (1); |
| } |
| |
| /* Record the Successful match. */ |
| if (gfc_merge_new_implicit (&ts) != SUCCESS) |
| return MATCH_ERROR; |
| continue; |
| } |
| |
| gfc_current_locus = cur_loc; |
| } |
| |
| /* Discard the (incorrectly) matched range. */ |
| gfc_clear_new_implicit (); |
| |
| /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ |
| if (ts.type == BT_CHARACTER) |
| m = match_char_spec (&ts); |
| else |
| { |
| m = gfc_match_kind_spec (&ts); |
| if (m == MATCH_NO) |
| { |
| m = gfc_match_old_kind_spec (&ts); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_NO) |
| goto syntax; |
| } |
| } |
| if (m == MATCH_ERROR) |
| goto error; |
| |
| m = match_implicit_range (); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_NO) |
| goto syntax; |
| |
| gfc_gobble_whitespace (); |
| c = gfc_next_char (); |
| if ((c != '\n') && (c != ',')) |
| goto syntax; |
| |
| if (gfc_merge_new_implicit (&ts) != SUCCESS) |
| return MATCH_ERROR; |
| } |
| while (c == ','); |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_syntax_error (ST_IMPLICIT); |
| |
| error: |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Matches an attribute specification including array specs. If |
| successful, leaves the variables current_attr and current_as |
| holding the specification. Also sets the colon_seen variable for |
| later use by matchers associated with initializations. |
| |
| This subroutine is a little tricky in the sense that we don't know |
| if we really have an attr-spec until we hit the double colon. |
| Until that time, we can only return MATCH_NO. This forces us to |
| check for duplicate specification at this level. */ |
| |
| static match |
| match_attr_spec (void) |
| { |
| |
| /* Modifiers that can exist in a type statement. */ |
| typedef enum |
| { GFC_DECL_BEGIN = 0, |
| DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, |
| DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, |
| DECL_PARAMETER, DECL_POINTER, DECL_PRIVATE, DECL_PUBLIC, DECL_SAVE, |
| DECL_TARGET, DECL_COLON, DECL_NONE, |
| GFC_DECL_END /* Sentinel */ |
| } |
| decl_types; |
| |
| /* GFC_DECL_END is the sentinel, index starts at 0. */ |
| #define NUM_DECL GFC_DECL_END |
| |
| static mstring decls[] = { |
| minit (", allocatable", DECL_ALLOCATABLE), |
| minit (", dimension", DECL_DIMENSION), |
| minit (", external", DECL_EXTERNAL), |
| minit (", intent ( in )", DECL_IN), |
| minit (", intent ( out )", DECL_OUT), |
| minit (", intent ( in out )", DECL_INOUT), |
| minit (", intrinsic", DECL_INTRINSIC), |
| minit (", optional", DECL_OPTIONAL), |
| minit (", parameter", DECL_PARAMETER), |
| minit (", pointer", DECL_POINTER), |
| minit (", private", DECL_PRIVATE), |
| minit (", public", DECL_PUBLIC), |
| minit (", save", DECL_SAVE), |
| minit (", target", DECL_TARGET), |
| minit ("::", DECL_COLON), |
| minit (NULL, DECL_NONE) |
| }; |
| |
| locus start, seen_at[NUM_DECL]; |
| int seen[NUM_DECL]; |
| decl_types d; |
| const char *attr; |
| match m; |
| try t; |
| |
| gfc_clear_attr (¤t_attr); |
| start = gfc_current_locus; |
| |
| current_as = NULL; |
| colon_seen = 0; |
| |
| /* See if we get all of the keywords up to the final double colon. */ |
| for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) |
| seen[d] = 0; |
| |
| for (;;) |
| { |
| d = (decl_types) gfc_match_strings (decls); |
| if (d == DECL_NONE || d == DECL_COLON) |
| break; |
| |
| seen[d]++; |
| seen_at[d] = gfc_current_locus; |
| |
| if (d == DECL_DIMENSION) |
| { |
| m = gfc_match_array_spec (¤t_as); |
| |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Missing dimension specification at %C"); |
| m = MATCH_ERROR; |
| } |
| |
| if (m == MATCH_ERROR) |
| goto cleanup; |
| } |
| } |
| |
| /* No double colon, so assume that we've been looking at something |
| else the whole time. */ |
| if (d == DECL_NONE) |
| { |
| m = MATCH_NO; |
| goto cleanup; |
| } |
| |
| /* Since we've seen a double colon, we have to be looking at an |
| attr-spec. This means that we can now issue errors. */ |
| for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) |
| if (seen[d] > 1) |
| { |
| switch (d) |
| { |
| case DECL_ALLOCATABLE: |
| attr = "ALLOCATABLE"; |
| break; |
| case DECL_DIMENSION: |
| attr = "DIMENSION"; |
| break; |
| case DECL_EXTERNAL: |
| attr = "EXTERNAL"; |
| break; |
| case DECL_IN: |
| attr = "INTENT (IN)"; |
| break; |
| case DECL_OUT: |
| attr = "INTENT (OUT)"; |
| break; |
| case DECL_INOUT: |
| attr = "INTENT (IN OUT)"; |
| break; |
| case DECL_INTRINSIC: |
| attr = "INTRINSIC"; |
| break; |
| case DECL_OPTIONAL: |
| attr = "OPTIONAL"; |
| break; |
| case DECL_PARAMETER: |
| attr = "PARAMETER"; |
| break; |
| case DECL_POINTER: |
| attr = "POINTER"; |
| break; |
| case DECL_PRIVATE: |
| attr = "PRIVATE"; |
| break; |
| case DECL_PUBLIC: |
| attr = "PUBLIC"; |
| break; |
| case DECL_SAVE: |
| attr = "SAVE"; |
| break; |
| case DECL_TARGET: |
| attr = "TARGET"; |
| break; |
| default: |
| attr = NULL; /* This shouldn't happen */ |
| } |
| |
| gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| /* Now that we've dealt with duplicate attributes, add the attributes |
| to the current attribute. */ |
| for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) |
| { |
| if (seen[d] == 0) |
| continue; |
| |
| if (gfc_current_state () == COMP_DERIVED |
| && d != DECL_DIMENSION && d != DECL_POINTER |
| && d != DECL_COLON && d != DECL_NONE) |
| { |
| if (d == DECL_ALLOCATABLE) |
| { |
| if (gfc_notify_std (GFC_STD_F2003, |
| "In the selected standard, the ALLOCATABLE " |
| "attribute at %C is not allowed in a TYPE " |
| "definition") == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| else |
| { |
| gfc_error ("Attribute at %L is not allowed in a TYPE definition", |
| &seen_at[d]); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| |
| if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
| && gfc_current_state () != COMP_MODULE) |
| { |
| if (d == DECL_PRIVATE) |
| attr = "PRIVATE"; |
| else |
| attr = "PUBLIC"; |
| |
| gfc_error ("%s attribute at %L is not allowed outside of a MODULE", |
| attr, &seen_at[d]); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| switch (d) |
| { |
| case DECL_ALLOCATABLE: |
| t = gfc_add_allocatable (¤t_attr, &seen_at[d]); |
| break; |
| |
| case DECL_DIMENSION: |
| t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
| break; |
| |
| case DECL_EXTERNAL: |
| t = gfc_add_external (¤t_attr, &seen_at[d]); |
| break; |
| |
| case DECL_IN: |
| t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); |
| break; |
| |
| case DECL_OUT: |
| t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); |
| break; |
| |
| case DECL_INOUT: |
| t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); |
| break; |
| |
| case DECL_INTRINSIC: |
| t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); |
| break; |
| |
| case DECL_OPTIONAL: |
| t = gfc_add_optional (¤t_attr, &seen_at[d]); |
| break; |
| |
| case DECL_PARAMETER: |
| t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
| break; |
| |
| case DECL_POINTER: |
| t = gfc_add_pointer (¤t_attr, &seen_at[d]); |
| break; |
| |
| case DECL_PRIVATE: |
| t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
| &seen_at[d]); |
| break; |
| |
| case DECL_PUBLIC: |
| t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
| &seen_at[d]); |
| break; |
| |
| case DECL_SAVE: |
| t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
| break; |
| |
| case DECL_TARGET: |
| t = gfc_add_target (¤t_attr, &seen_at[d]); |
| break; |
| |
| default: |
| gfc_internal_error ("match_attr_spec(): Bad attribute"); |
| } |
| |
| if (t == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| |
| colon_seen = 1; |
| return MATCH_YES; |
| |
| cleanup: |
| gfc_current_locus = start; |
| gfc_free_array_spec (current_as); |
| current_as = NULL; |
| return m; |
| } |
| |
| |
| /* Match a data declaration statement. */ |
| |
| match |
| gfc_match_data_decl (void) |
| { |
| gfc_symbol *sym; |
| match m; |
| int elem; |
| |
| m = match_type_spec (¤t_ts, 0); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) |
| { |
| sym = gfc_use_derived (current_ts.derived); |
| |
| if (sym == NULL) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| current_ts.derived = sym; |
| } |
| |
| m = match_attr_spec (); |
| if (m == MATCH_ERROR) |
| { |
| m = MATCH_NO; |
| goto cleanup; |
| } |
| |
| if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) |
| { |
| |
| if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) |
| goto ok; |
| |
| gfc_find_symbol (current_ts.derived->name, |
| current_ts.derived->ns->parent, 1, &sym); |
| |
| /* Any symbol that we find had better be a type definition |
| which has its components defined. */ |
| if (sym != NULL && sym->attr.flavor == FL_DERIVED |
| && current_ts.derived->components != NULL) |
| goto ok; |
| |
| /* Now we have an error, which we signal, and then fix up |
| because the knock-on is plain and simple confusing. */ |
| gfc_error_now ("Derived type at %C has not been previously defined " |
| "and so cannot appear in a derived type definition."); |
| current_attr.pointer = 1; |
| goto ok; |
| } |
| |
| ok: |
| /* If we have an old-style character declaration, and no new-style |
| attribute specifications, then there a comma is optional between |
| the type specification and the variable list. */ |
| if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) |
| gfc_match_char (','); |
| |
| /* Give the types/attributes to symbols that follow. Give the element |
| a number so that repeat character length expressions can be copied. */ |
| elem = 1; |
| for (;;) |
| { |
| m = variable_decl (elem++); |
| if (m == MATCH_ERROR) |
| goto cleanup; |
| if (m == MATCH_NO) |
| break; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| goto cleanup; |
| if (gfc_match_char (',') != MATCH_YES) |
| break; |
| } |
| |
| if (gfc_error_flag_test () == 0) |
| gfc_error ("Syntax error in data declaration at %C"); |
| m = MATCH_ERROR; |
| |
| cleanup: |
| gfc_free_array_spec (current_as); |
| current_as = NULL; |
| return m; |
| } |
| |
| |
| /* Match a prefix associated with a function or subroutine |
| declaration. If the typespec pointer is nonnull, then a typespec |
| can be matched. Note that if nothing matches, MATCH_YES is |
| returned (the null string was matched). */ |
| |
| static match |
| match_prefix (gfc_typespec * ts) |
| { |
| int seen_type; |
| |
| gfc_clear_attr (¤t_attr); |
| seen_type = 0; |
| |
| loop: |
| if (!seen_type && ts != NULL |
| && match_type_spec (ts, 0) == MATCH_YES |
| && gfc_match_space () == MATCH_YES) |
| { |
| |
| seen_type = 1; |
| goto loop; |
| } |
| |
| if (gfc_match ("elemental% ") == MATCH_YES) |
| { |
| if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| goto loop; |
| } |
| |
| if (gfc_match ("pure% ") == MATCH_YES) |
| { |
| if (gfc_add_pure (¤t_attr, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| goto loop; |
| } |
| |
| if (gfc_match ("recursive% ") == MATCH_YES) |
| { |
| if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| goto loop; |
| } |
| |
| /* At this point, the next item is not a prefix. */ |
| return MATCH_YES; |
| } |
| |
| |
| /* Copy attributes matched by match_prefix() to attributes on a symbol. */ |
| |
| static try |
| copy_prefix (symbol_attribute * dest, locus * where) |
| { |
| |
| if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
| return FAILURE; |
| |
| if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) |
| return FAILURE; |
| |
| if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) |
| return FAILURE; |
| |
| return SUCCESS; |
| } |
| |
| |
| /* Match a formal argument list. */ |
| |
| match |
| gfc_match_formal_arglist (gfc_symbol * progname, int st_flag, int null_flag) |
| { |
| gfc_formal_arglist *head, *tail, *p, *q; |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *sym; |
| match m; |
| |
| head = tail = NULL; |
| |
| if (gfc_match_char ('(') != MATCH_YES) |
| { |
| if (null_flag) |
| goto ok; |
| return MATCH_NO; |
| } |
| |
| if (gfc_match_char (')') == MATCH_YES) |
| goto ok; |
| |
| for (;;) |
| { |
| if (gfc_match_char ('*') == MATCH_YES) |
| sym = NULL; |
| else |
| { |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| if (gfc_get_symbol (name, NULL, &sym)) |
| goto cleanup; |
| } |
| |
| p = gfc_get_formal_arglist (); |
| |
| if (head == NULL) |
| head = tail = p; |
| else |
| { |
| tail->next = p; |
| tail = p; |
| } |
| |
| tail->sym = sym; |
| |
| /* We don't add the VARIABLE flavor because the name could be a |
| dummy procedure. We don't apply these attributes to formal |
| arguments of statement functions. */ |
| if (sym != NULL && !st_flag |
| && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
| || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| /* The name of a program unit can be in a different namespace, |
| so check for it explicitly. After the statement is accepted, |
| the name is checked for especially in gfc_get_symbol(). */ |
| if (gfc_new_block != NULL && sym != NULL |
| && strcmp (sym->name, gfc_new_block->name) == 0) |
| { |
| gfc_error ("Name '%s' at %C is the name of the procedure", |
| sym->name); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (gfc_match_char (')') == MATCH_YES) |
| goto ok; |
| |
| m = gfc_match_char (','); |
| if (m != MATCH_YES) |
| { |
| gfc_error ("Unexpected junk in formal argument list at %C"); |
| goto cleanup; |
| } |
| } |
| |
| ok: |
| /* Check for duplicate symbols in the formal argument list. */ |
| if (head != NULL) |
| { |
| for (p = head; p->next; p = p->next) |
| { |
| if (p->sym == NULL) |
| continue; |
| |
| for (q = p->next; q; q = q->next) |
| if (p->sym == q->sym) |
| { |
| gfc_error |
| ("Duplicate symbol '%s' in formal argument list at %C", |
| p->sym->name); |
| |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| } |
| |
| if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) == |
| FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| return MATCH_YES; |
| |
| cleanup: |
| gfc_free_formal_arglist (head); |
| return m; |
| } |
| |
| |
| /* Match a RESULT specification following a function declaration or |
| ENTRY statement. Also matches the end-of-statement. */ |
| |
| static match |
| match_result (gfc_symbol * function, gfc_symbol ** result) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *r; |
| match m; |
| |
| if (gfc_match (" result (") != MATCH_YES) |
| return MATCH_NO; |
| |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (gfc_match (" )%t") != MATCH_YES) |
| { |
| gfc_error ("Unexpected junk following RESULT variable at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (strcmp (function->name, name) == 0) |
| { |
| gfc_error |
| ("RESULT variable at %C must be different than function name"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_get_symbol (name, NULL, &r)) |
| return MATCH_ERROR; |
| |
| if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
| || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| *result = r; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a function declaration. */ |
| |
| match |
| gfc_match_function_decl (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *sym, *result; |
| locus old_loc; |
| match m; |
| |
| if (gfc_current_state () != COMP_NONE |
| && gfc_current_state () != COMP_INTERFACE |
| && gfc_current_state () != COMP_CONTAINS) |
| return MATCH_NO; |
| |
| gfc_clear_ts (¤t_ts); |
| |
| old_loc = gfc_current_locus; |
| |
| m = match_prefix (¤t_ts); |
| if (m != MATCH_YES) |
| { |
| gfc_current_locus = old_loc; |
| return m; |
| } |
| |
| if (gfc_match ("function% %n", name) != MATCH_YES) |
| { |
| gfc_current_locus = old_loc; |
| return MATCH_NO; |
| } |
| |
| if (get_proc_name (name, &sym, false)) |
| return MATCH_ERROR; |
| gfc_new_block = sym; |
| |
| m = gfc_match_formal_arglist (sym, 0, 0); |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Expected formal argument list in function " |
| "definition at %C"); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| else if (m == MATCH_ERROR) |
| goto cleanup; |
| |
| result = NULL; |
| |
| if (gfc_match_eos () != MATCH_YES) |
| { |
| /* See if a result variable is present. */ |
| m = match_result (sym, &result); |
| if (m == MATCH_NO) |
| gfc_error ("Unexpected junk after function declaration at %C"); |
| |
| if (m != MATCH_YES) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| |
| /* Make changes to the symbol. */ |
| m = MATCH_ERROR; |
| |
| if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
| goto cleanup; |
| |
| if (gfc_missing_attr (&sym->attr, NULL) == FAILURE |
| || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) |
| goto cleanup; |
| |
| if (current_ts.type != BT_UNKNOWN |
| && sym->ts.type != BT_UNKNOWN |
| && !sym->attr.implicit_type) |
| { |
| gfc_error ("Function '%s' at %C already has a type of %s", name, |
| gfc_basic_typename (sym->ts.type)); |
| goto cleanup; |
| } |
| |
| if (result == NULL) |
| { |
| sym->ts = current_ts; |
| sym->result = sym; |
| } |
| else |
| { |
| result->ts = current_ts; |
| sym->result = result; |
| } |
| |
| return MATCH_YES; |
| |
| cleanup: |
| gfc_current_locus = old_loc; |
| return m; |
| } |
| |
| /* This is mostly a copy of parse.c(add_global_procedure) but modified to pass the |
| name of the entry, rather than the gfc_current_block name, and to return false |
| upon finding an existing global entry. */ |
| |
| static bool |
| add_global_entry (const char * name, int sub) |
| { |
| gfc_gsymbol *s; |
| |
| s = gfc_get_gsymbol(name); |
| |
| if (s->defined |
| || (s->type != GSYM_UNKNOWN && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) |
| global_used(s, NULL); |
| else |
| { |
| s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
| s->where = gfc_current_locus; |
| s->defined = 1; |
| return true; |
| } |
| return false; |
| } |
| |
| /* Match an ENTRY statement. */ |
| |
| match |
| gfc_match_entry (void) |
| { |
| gfc_symbol *proc; |
| gfc_symbol *result; |
| gfc_symbol *entry; |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_compile_state state; |
| match m; |
| gfc_entry_list *el; |
| locus old_loc; |
| bool module_procedure; |
| |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| return m; |
| |
| state = gfc_current_state (); |
| if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
| { |
| switch (state) |
| { |
| case COMP_PROGRAM: |
| gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); |
| break; |
| case COMP_MODULE: |
| gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); |
| break; |
| case COMP_BLOCK_DATA: |
| gfc_error |
| ("ENTRY statement at %C cannot appear within a BLOCK DATA"); |
| break; |
| case COMP_INTERFACE: |
| gfc_error |
| ("ENTRY statement at %C cannot appear within an INTERFACE"); |
| break; |
| case COMP_DERIVED: |
| gfc_error |
| ("ENTRY statement at %C cannot appear " |
| "within a DERIVED TYPE block"); |
| break; |
| case COMP_IF: |
| gfc_error |
| ("ENTRY statement at %C cannot appear within an IF-THEN block"); |
| break; |
| case COMP_DO: |
| gfc_error |
| ("ENTRY statement at %C cannot appear within a DO block"); |
| break; |
| case COMP_SELECT: |
| gfc_error |
| ("ENTRY statement at %C cannot appear within a SELECT block"); |
| break; |
| case COMP_FORALL: |
| gfc_error |
| ("ENTRY statement at %C cannot appear within a FORALL block"); |
| break; |
| case COMP_WHERE: |
| gfc_error |
| ("ENTRY statement at %C cannot appear within a WHERE block"); |
| break; |
| case COMP_CONTAINS: |
| gfc_error |
| ("ENTRY statement at %C cannot appear " |
| "within a contained subprogram"); |
| break; |
| default: |
| gfc_internal_error ("gfc_match_entry(): Bad state"); |
| } |
| return MATCH_ERROR; |
| } |
| |
| module_procedure = gfc_current_ns->parent != NULL |
| && gfc_current_ns->parent->proc_name |
| && gfc_current_ns->parent->proc_name->attr.flavor == FL_MODULE; |
| |
| if (gfc_current_ns->parent != NULL |
| && gfc_current_ns->parent->proc_name |
| && !module_procedure) |
| { |
| gfc_error("ENTRY statement at %C cannot appear in a " |
| "contained procedure"); |
| return MATCH_ERROR; |
| } |
| |
| /* Module function entries need special care in get_proc_name |
| because previous references within the function will have |
| created symbols attached to the current namespace. */ |
| if (get_proc_name (name, &entry, |
| gfc_current_ns->parent != NULL |
| && module_procedure |
| && gfc_current_ns->proc_name->attr.function)) |
| return MATCH_ERROR; |
| |
| proc = gfc_current_block (); |
| |
| if (state == COMP_SUBROUTINE) |
| { |
| /* An entry in a subroutine. */ |
| if (!add_global_entry (name, 1)) |
| return MATCH_ERROR; |
| |
| m = gfc_match_formal_arglist (entry, 0, 1); |
| if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
| || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| } |
| else |
| { |
| /* An entry in a function. |
| We need to take special care because writing |
| ENTRY f() |
| as |
| ENTRY f |
| is allowed, whereas |
| ENTRY f() RESULT (r) |
| can't be written as |
| ENTRY f RESULT (r). */ |
| if (!add_global_entry (name, 0)) |
| return MATCH_ERROR; |
| |
| old_loc = gfc_current_locus; |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| gfc_current_locus = old_loc; |
| /* Match the empty argument list, and add the interface to |
| the symbol. */ |
| m = gfc_match_formal_arglist (entry, 0, 1); |
| } |
| else |
| m = gfc_match_formal_arglist (entry, 0, 0); |
| |
| if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| result = NULL; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
| || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| entry->result = entry; |
| } |
| else |
| { |
| m = match_result (proc, &result); |
| if (m == MATCH_NO) |
| gfc_syntax_error (ST_ENTRY); |
| if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
| || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE |
| || gfc_add_function (&entry->attr, result->name, |
| NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| entry->result = result; |
| } |
| } |
| |
| if (gfc_match_eos () != MATCH_YES) |
| { |
| gfc_syntax_error (ST_ENTRY); |
| return MATCH_ERROR; |
| } |
| |
| entry->attr.recursive = proc->attr.recursive; |
| entry->attr.elemental = proc->attr.elemental; |
| entry->attr.pure = proc->attr.pure; |
| |
| el = gfc_get_entry_list (); |
| el->sym = entry; |
| el->next = gfc_current_ns->entries; |
| gfc_current_ns->entries = el; |
| if (el->next) |
| el->id = el->next->id + 1; |
| else |
| el->id = 1; |
| |
| new_st.op = EXEC_ENTRY; |
| new_st.ext.entry = el; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a subroutine statement, including optional prefixes. */ |
| |
| match |
| gfc_match_subroutine (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *sym; |
| match m; |
| |
| if (gfc_current_state () != COMP_NONE |
| && gfc_current_state () != COMP_INTERFACE |
| && gfc_current_state () != COMP_CONTAINS) |
| return MATCH_NO; |
| |
| m = match_prefix (NULL); |
| if (m != MATCH_YES) |
| return m; |
| |
| m = gfc_match ("subroutine% %n", name); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (get_proc_name (name, &sym, false)) |
| return MATCH_ERROR; |
| gfc_new_block = sym; |
| |
| if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) |
| return MATCH_ERROR; |
| |
| if (gfc_match_eos () != MATCH_YES) |
| { |
| gfc_syntax_error (ST_SUBROUTINE); |
| return MATCH_ERROR; |
| } |
| |
| if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) |
| return MATCH_ERROR; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Return nonzero if we're currently compiling a contained procedure. */ |
| |
| static int |
| contained_procedure (void) |
| { |
| gfc_state_data *s; |
| |
| for (s=gfc_state_stack; s; s=s->previous) |
| if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
| && s->previous != NULL |
| && s->previous->state == COMP_CONTAINS) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* Set the kind of each enumerator. The kind is selected such that it is |
| interoperable with the corresponding C enumeration type, making |
| sure that -fshort-enums is honored. */ |
| |
| static void |
| set_enum_kind(void) |
| { |
| enumerator_history *current_history = NULL; |
| int kind; |
| int i; |
| |
| if (max_enum == NULL || enum_history == NULL) |
| return; |
| |
| if (!gfc_option.fshort_enums) |
| return; |
| |
| i = 0; |
| do |
| { |
| kind = gfc_integer_kinds[i++].kind; |
| } |
| while (kind < gfc_c_int_kind |
| && gfc_check_integer_range (max_enum->initializer->value.integer, |
| kind) != ARITH_OK); |
| |
| current_history = enum_history; |
| while (current_history != NULL) |
| { |
| current_history->sym->ts.kind = kind; |
| current_history = current_history->next; |
| } |
| } |
| |
| /* Match any of the various end-block statements. Returns the type of |
| END to the caller. The END INTERFACE, END IF, END DO and END |
| SELECT statements cannot be replaced by a single END statement. */ |
| |
| match |
| gfc_match_end (gfc_statement * st) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_compile_state state; |
| locus old_loc; |
| const char *block_name; |
| const char *target; |
| int eos_ok; |
| match m; |
| |
| old_loc = gfc_current_locus; |
| if (gfc_match ("end") != MATCH_YES) |
| return MATCH_NO; |
| |
| state = gfc_current_state (); |
| block_name = |
| gfc_current_block () == NULL ? NULL : gfc_current_block ()->name; |
| |
| if (state == COMP_CONTAINS) |
| { |
| state = gfc_state_stack->previous->state; |
| block_name = gfc_state_stack->previous->sym == NULL ? NULL |
| : gfc_state_stack->previous->sym->name; |
| } |
| |
| switch (state) |
| { |
| case COMP_NONE: |
| case COMP_PROGRAM: |
| *st = ST_END_PROGRAM; |
| target = " program"; |
| eos_ok = 1; |
| break; |
| |
| case COMP_SUBROUTINE: |
| *st = ST_END_SUBROUTINE; |
| target = " subroutine"; |
| eos_ok = !contained_procedure (); |
| break; |
| |
| case COMP_FUNCTION: |
| *st = ST_END_FUNCTION; |
| target = " function"; |
| eos_ok = !contained_procedure (); |
| break; |
| |
| case COMP_BLOCK_DATA: |
| *st = ST_END_BLOCK_DATA; |
| target = " block data"; |
| eos_ok = 1; |
| break; |
| |
| case COMP_MODULE: |
| *st = ST_END_MODULE; |
| target = " module"; |
| eos_ok = 1; |
| break; |
| |
| case COMP_INTERFACE: |
| *st = ST_END_INTERFACE; |
| target = " interface"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_DERIVED: |
| *st = ST_END_TYPE; |
| target = " type"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_IF: |
| *st = ST_ENDIF; |
| target = " if"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_DO: |
| *st = ST_ENDDO; |
| target = " do"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_SELECT: |
| *st = ST_END_SELECT; |
| target = " select"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_FORALL: |
| *st = ST_END_FORALL; |
| target = " forall"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_WHERE: |
| *st = ST_END_WHERE; |
| target = " where"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_ENUM: |
| *st = ST_END_ENUM; |
| target = " enum"; |
| eos_ok = 0; |
| last_initializer = NULL; |
| set_enum_kind (); |
| gfc_free_enum_history (); |
| break; |
| |
| default: |
| gfc_error ("Unexpected END statement at %C"); |
| goto cleanup; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| if (!eos_ok) |
| { |
| /* We would have required END [something] */ |
| gfc_error ("%s statement expected at %L", |
| gfc_ascii_statement (*st), &old_loc); |
| goto cleanup; |
| } |
| |
| return MATCH_YES; |
| } |
| |
| /* Verify that we've got the sort of end-block that we're expecting. */ |
| if (gfc_match (target) != MATCH_YES) |
| { |
| gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); |
| goto cleanup; |
| } |
| |
| /* If we're at the end, make sure a block name wasn't required. */ |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| |
| if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT) |
| return MATCH_YES; |
| |
| if (gfc_current_block () == NULL) |
| return MATCH_YES; |
| |
| gfc_error ("Expected block name of '%s' in %s statement at %C", |
| block_name, gfc_ascii_statement (*st)); |
| |
| return MATCH_ERROR; |
| } |
| |
| /* END INTERFACE has a special handler for its several possible endings. */ |
| if (*st == ST_END_INTERFACE) |
| return gfc_match_end_interface (); |
| |
| /* We haven't hit the end of statement, so what is left must be an end-name. */ |
| m = gfc_match_space (); |
| if (m == MATCH_YES) |
| m = gfc_match_name (name); |
| |
| if (m == MATCH_NO) |
| gfc_error ("Expected terminating name at %C"); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| if (block_name == NULL) |
| goto syntax; |
| |
| if (strcmp (name, block_name) != 0) |
| { |
| gfc_error ("Expected label '%s' for %s statement at %C", block_name, |
| gfc_ascii_statement (*st)); |
| goto cleanup; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| return MATCH_YES; |
| |
| syntax: |
| gfc_syntax_error (*st); |
| |
| cleanup: |
| gfc_current_locus = old_loc; |
| return MATCH_ERROR; |
| } |
| |
| |
| |
| /***************** Attribute declaration statements ****************/ |
| |
| /* Set the attribute of a single variable. */ |
| |
| static match |
| attr_decl1 (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_array_spec *as; |
| gfc_symbol *sym; |
| locus var_locus; |
| match m; |
| |
| as = NULL; |
| |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| if (find_special (name, &sym)) |
| return MATCH_ERROR; |
| |
| var_locus = gfc_current_locus; |
| |
| /* Deal with possible array specification for certain attributes. */ |
| if (current_attr.dimension |
| || current_attr.allocatable |
| || current_attr.pointer |
| || current_attr.target) |
| { |
| m = gfc_match_array_spec (&as); |
| if (m == MATCH_ERROR) |
| goto cleanup; |
| |
| if (current_attr.dimension && m == MATCH_NO) |
| { |
| gfc_error |
| ("Missing array specification at %L in DIMENSION statement", |
| &var_locus); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if ((current_attr.allocatable || current_attr.pointer) |
| && (m == MATCH_YES) && (as->type != AS_DEFERRED)) |
| { |
| gfc_error ("Array specification must be deferred at %L", |
| &var_locus); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| |
| /* Update symbol table. DIMENSION attribute is set in gfc_set_array_spec(). */ |
| if (current_attr.dimension == 0 |
| && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (sym->attr.cray_pointee && sym->as != NULL) |
| { |
| /* Fix the array spec. */ |
| m = gfc_mod_pointee_as (sym->as); |
| if (m == MATCH_ERROR) |
| goto cleanup; |
| } |
| |
| if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if ((current_attr.external || current_attr.intrinsic) |
| && sym->attr.flavor != FL_PROCEDURE |
| && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| return MATCH_YES; |
| |
| cleanup: |
| gfc_free_array_spec (as); |
| return m; |
| } |
| |
| |
| /* Generic attribute declaration subroutine. Used for attributes that |
| just have a list of names. */ |
| |
| static match |
| attr_decl (void) |
| { |
| match m; |
| |
| /* Gobble the optional double colon, by simply ignoring the result |
| of gfc_match(). */ |
| gfc_match (" ::"); |
| |
| for (;;) |
| { |
| m = attr_decl1 (); |
| if (m != MATCH_YES) |
| break; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| m = MATCH_YES; |
| break; |
| } |
| |
| if (gfc_match_char (',') != MATCH_YES) |
| { |
| gfc_error ("Unexpected character in variable list at %C"); |
| m = MATCH_ERROR; |
| break; |
| } |
| } |
| |
| return m; |
| } |
| |
| |
| /* This routine matches Cray Pointer declarations of the form: |
| pointer ( <pointer>, <pointee> ) |
| or |
| pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
| The pointer, if already declared, should be an integer. Otherwise, we |
| set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
| be either a scalar, or an array declaration. No space is allocated for |
| the pointee. For the statement |
| pointer (ipt, ar(10)) |
| any subsequent uses of ar will be translated (in C-notation) as |
| ar(i) => ((<type> *) ipt)(i) |
| After gimplification, pointee variable will disappear in the code. */ |
| |
| static match |
| cray_pointer_decl (void) |
| { |
| match m; |
| gfc_array_spec *as; |
| gfc_symbol *cptr; /* Pointer symbol. */ |
| gfc_symbol *cpte; /* Pointee symbol. */ |
| locus var_locus; |
| bool done = false; |
| |
| while (!done) |
| { |
| if (gfc_match_char ('(') != MATCH_YES) |
| { |
| gfc_error ("Expected '(' at %C"); |
| return MATCH_ERROR; |
| } |
| |
| /* Match pointer. */ |
| var_locus = gfc_current_locus; |
| gfc_clear_attr (¤t_attr); |
| gfc_add_cray_pointer (¤t_attr, &var_locus); |
| current_ts.type = BT_INTEGER; |
| current_ts.kind = gfc_index_integer_kind; |
| |
| m = gfc_match_symbol (&cptr, 0); |
| if (m != MATCH_YES) |
| { |
| gfc_error ("Expected variable name at %C"); |
| return m; |
| } |
| |
| if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
| return MATCH_ERROR; |
| |
| gfc_set_sym_referenced (cptr); |
| |
| if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ |
| { |
| cptr->ts.type = BT_INTEGER; |
| cptr->ts.kind = gfc_index_integer_kind; |
| } |
| else if (cptr->ts.type != BT_INTEGER) |
| { |
| gfc_error ("Cray pointer at %C must be an integer."); |
| return MATCH_ERROR; |
| } |
| else if (cptr->ts.kind < gfc_index_integer_kind) |
| gfc_warning ("Cray pointer at %C has %d bytes of precision;" |
| " memory addresses require %d bytes.", |
| cptr->ts.kind, |
| gfc_index_integer_kind); |
| |
| if (gfc_match_char (',') != MATCH_YES) |
| { |
| gfc_error ("Expected \",\" at %C"); |
| return MATCH_ERROR; |
| } |
| |
| /* Match Pointee. */ |
| var_locus = gfc_current_locus; |
| gfc_clear_attr (¤t_attr); |
| gfc_add_cray_pointee (¤t_attr, &var_locus); |
| current_ts.type = BT_UNKNOWN; |
| current_ts.kind = 0; |
| |
| m = gfc_match_symbol (&cpte, 0); |
| if (m != MATCH_YES) |
| { |
| gfc_error ("Expected variable name at %C"); |
| return m; |
| } |
| |
| /* Check for an optional array spec. */ |
| m = gfc_match_array_spec (&as); |
| if (m == MATCH_ERROR) |
| { |
| gfc_free_array_spec (as); |
| return m; |
| } |
| else if (m == MATCH_NO) |
| { |
| gfc_free_array_spec (as); |
| as = NULL; |
| } |
| |
| if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) |
| return MATCH_ERROR; |
| |
| gfc_set_sym_referenced (cpte); |
| |
| if (cpte->as == NULL) |
| { |
| if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) |
| gfc_internal_error ("Couldn't set Cray pointee array spec."); |
| } |
| else if (as != NULL) |
| { |
| gfc_error ("Duplicate array spec for Cray pointee at %C."); |
| gfc_free_array_spec (as); |
| return MATCH_ERROR; |
| } |
| |
| as = NULL; |
| |
| if (cpte->as != NULL) |
| { |
| /* Fix array spec. */ |
| m = gfc_mod_pointee_as (cpte->as); |
| if (m == MATCH_ERROR) |
| return m; |
| } |
| |
| /* Point the Pointee at the Pointer. */ |
| cpte->cp_pointer = cptr; |
| |
| if (gfc_match_char (')') != MATCH_YES) |
| { |
| gfc_error ("Expected \")\" at %C"); |
| return MATCH_ERROR; |
| } |
| m = gfc_match_char (','); |
| if (m != MATCH_YES) |
| done = true; /* Stop searching for more declarations. */ |
| |
| } |
| |
| if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ |
| || gfc_match_eos () != MATCH_YES) |
| { |
| gfc_error ("Expected \",\" or end of statement at %C"); |
| return MATCH_ERROR; |
| } |
| return MATCH_YES; |
| } |
| |
| |
| match |
| gfc_match_external (void) |
| { |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.external = 1; |
| |
| return attr_decl (); |
| } |
| |
| |
| |
| match |
| gfc_match_intent (void) |
| { |
| sym_intent intent; |
| |
| intent = match_intent_spec (); |
| if (intent == INTENT_UNKNOWN) |
| return MATCH_ERROR; |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.intent = intent; |
| |
| return attr_decl (); |
| } |
| |
| |
| match |
| gfc_match_intrinsic (void) |
| { |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.intrinsic = 1; |
| |
| return attr_decl (); |
| } |
| |
| |
| match |
| gfc_match_optional (void) |
| { |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.optional = 1; |
| |
| return attr_decl (); |
| } |
| |
| |
| match |
| gfc_match_pointer (void) |
| { |
| gfc_gobble_whitespace (); |
| if (gfc_peek_char () == '(') |
| { |
| if (!gfc_option.flag_cray_pointer) |
| { |
| gfc_error ("Cray pointer declaration at %C requires -fcray-pointer" |
| " flag."); |
| return MATCH_ERROR; |
| } |
| return cray_pointer_decl (); |
| } |
| else |
| { |
| gfc_clear_attr (¤t_attr); |
| current_attr.pointer = 1; |
| |
| return attr_decl (); |
| } |
| } |
| |
| |
| match |
| gfc_match_allocatable (void) |
| { |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.allocatable = 1; |
| |
| return attr_decl (); |
| } |
| |
| |
| match |
| gfc_match_dimension (void) |
| { |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.dimension = 1; |
| |
| return attr_decl (); |
| } |
| |
| |
| match |
| gfc_match_target (void) |
| { |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.target = 1; |
| |
| return attr_decl (); |
| } |
| |
| |
| /* Match the list of entities being specified in a PUBLIC or PRIVATE |
| statement. */ |
| |
| static match |
| access_attr_decl (gfc_statement st) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| interface_type type; |
| gfc_user_op *uop; |
| gfc_symbol *sym; |
| gfc_intrinsic_op operator; |
| match m; |
| |
| if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) |
| goto done; |
| |
| for (;;) |
| { |
| m = gfc_match_generic_spec (&type, name, &operator); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| switch (type) |
| { |
| case INTERFACE_NAMELESS: |
| goto syntax; |
| |
| case INTERFACE_GENERIC: |
| if (gfc_get_symbol (name, NULL, &sym)) |
| goto done; |
| |
| if (gfc_add_access (&sym->attr, |
| (st == |
| ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE, |
| sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| break; |
| |
| case INTERFACE_INTRINSIC_OP: |
| if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) |
| { |
| gfc_current_ns->operator_access[operator] = |
| (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
| } |
| else |
| { |
| gfc_error ("Access specification of the %s operator at %C has " |
| "already been specified", gfc_op2string (operator)); |
| goto done; |
| } |
| |
| break; |
| |
| case INTERFACE_USER_OP: |
| uop = gfc_get_uop (name); |
| |
| if (uop->access == ACCESS_UNKNOWN) |
| { |
| uop->access = |
| (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
| } |
| else |
| { |
| gfc_error |
| ("Access specification of the .%s. operator at %C has " |
| "already been specified", sym->name); |
| goto done; |
| } |
| |
| break; |
| } |
| |
| if (gfc_match_char (',') == MATCH_NO) |
| break; |
| } |
| |
| if (gfc_match_eos () != MATCH_YES) |
| goto syntax; |
| return MATCH_YES; |
| |
| syntax: |
| gfc_syntax_error (st); |
| |
| done: |
| return MATCH_ERROR; |
| } |
| |
| |
| /* The PRIVATE statement is a bit weird in that it can be a attribute |
| declaration, but also works as a standlone statement inside of a |
| type declaration or a module. */ |
| |
| match |
| gfc_match_private (gfc_statement * st) |
| { |
| |
| if (gfc_match ("private") != MATCH_YES) |
| return MATCH_NO; |
| |
| if (gfc_current_state () == COMP_DERIVED) |
| { |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| *st = ST_PRIVATE; |
| return MATCH_YES; |
| } |
| |
| gfc_syntax_error (ST_PRIVATE); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| *st = ST_PRIVATE; |
| return MATCH_YES; |
| } |
| |
| *st = ST_ATTR_DECL; |
| return access_attr_decl (ST_PRIVATE); |
| } |
| |
| |
| match |
| gfc_match_public (gfc_statement * st) |
| { |
| |
| if (gfc_match ("public") != MATCH_YES) |
| return MATCH_NO; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| *st = ST_PUBLIC; |
| return MATCH_YES; |
| } |
| |
| *st = ST_ATTR_DECL; |
| return access_attr_decl (ST_PUBLIC); |
| } |
| |
| |
| /* Workhorse for gfc_match_parameter. */ |
| |
| static match |
| do_parm (void) |
| { |
| gfc_symbol *sym; |
| gfc_expr *init; |
| match m; |
| |
| m = gfc_match_symbol (&sym, 0); |
| if (m == MATCH_NO) |
| gfc_error ("Expected variable name at %C in PARAMETER statement"); |
| |
| if (m != MATCH_YES) |
| return m; |
| |
| if (gfc_match_char ('=') == MATCH_NO) |
| { |
| gfc_error ("Expected = sign in PARAMETER statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| m = gfc_match_init_expr (&init); |
| if (m == MATCH_NO) |
| gfc_error ("Expected expression at %C in PARAMETER statement"); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (sym->ts.type == BT_UNKNOWN |
| && gfc_set_default_type (sym, 1, NULL) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (gfc_check_assign_symbol (sym, init) == FAILURE |
| || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (sym->ts.type == BT_CHARACTER |
| && sym->ts.cl != NULL |
| && sym->ts.cl->length != NULL |
| && sym->ts.cl->length->expr_type == EXPR_CONSTANT |
| && init->expr_type == EXPR_CONSTANT |
| && init->ts.type == BT_CHARACTER |
| && init->ts.kind == 1) |
| gfc_set_constant_character_len ( |
| mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
| |
| sym->value = init; |
| return MATCH_YES; |
| |
| cleanup: |
| gfc_free_expr (init); |
| return m; |
| } |
| |
| |
| /* Match a parameter statement, with the weird syntax that these have. */ |
| |
| match |
| gfc_match_parameter (void) |
| { |
| match m; |
| |
| if (gfc_match_char ('(') == MATCH_NO) |
| return MATCH_NO; |
| |
| for (;;) |
| { |
| m = do_parm (); |
| if (m != MATCH_YES) |
| break; |
| |
| if (gfc_match (" )%t") == MATCH_YES) |
| break; |
| |
| if (gfc_match_char (',') != MATCH_YES) |
| { |
| gfc_error ("Unexpected characters in PARAMETER statement at %C"); |
| m = MATCH_ERROR; |
| break; |
| } |
| } |
| |
| return m; |
| } |
| |
| |
| /* Save statements have a special syntax. */ |
| |
| match |
| gfc_match_save (void) |
| { |
| char n[GFC_MAX_SYMBOL_LEN+1]; |
| gfc_common_head *c; |
| gfc_symbol *sym; |
| match m; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| if (gfc_current_ns->seen_save) |
| { |
| if (gfc_notify_std (GFC_STD_LEGACY, |
| "Blanket SAVE statement at %C follows previous " |
| "SAVE statement") |
| == FAILURE) |
| return MATCH_ERROR; |
| } |
| |
| gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; |
| return MATCH_YES; |
| } |
| |
| if (gfc_current_ns->save_all) |
| { |
| if (gfc_notify_std (GFC_STD_LEGACY, |
| "SAVE statement at %C follows blanket SAVE statement") |
| == FAILURE) |
| return MATCH_ERROR; |
| } |
| |
| gfc_match (" ::"); |
| |
| for (;;) |
| { |
| m = gfc_match_symbol (&sym, 0); |
| switch (m) |
| { |
| case MATCH_YES: |
| if (gfc_add_save (&sym->attr, sym->name, |
| &gfc_current_locus) == FAILURE) |
| return MATCH_ERROR; |
| goto next_item; |
| |
| case MATCH_NO: |
| break; |
| |
| case MATCH_ERROR: |
| return MATCH_ERROR; |
| } |
| |
| m = gfc_match (" / %n /", &n); |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| if (m == MATCH_NO) |
| goto syntax; |
| |
| c = gfc_get_common (n, 0); |
| c->saved = 1; |
| |
| gfc_current_ns->seen_save = 1; |
| |
| next_item: |
| if (gfc_match_eos () == MATCH_YES) |
| break; |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_error ("Syntax error in SAVE statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Match a module procedure statement. Note that we have to modify |
| symbols in the parent's namespace because the current one was there |
| to receive symbols that are in an interface's formal argument list. */ |
| |
| match |
| gfc_match_modproc (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *sym; |
| match m; |
| |
| if (gfc_state_stack->state != COMP_INTERFACE |
| || gfc_state_stack->previous == NULL |
| || current_interface.type == INTERFACE_NAMELESS) |
| { |
| gfc_error |
| ("MODULE PROCEDURE at %C must be in a generic module interface"); |
| return MATCH_ERROR; |
| } |
| |
| for (;;) |
| { |
| m = gfc_match_name (name); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) |
| return MATCH_ERROR; |
| |
| if (sym->attr.proc != PROC_MODULE |
| && gfc_add_procedure (&sym->attr, PROC_MODULE, |
| sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_add_interface (sym) == FAILURE) |
| return MATCH_ERROR; |
| |
| sym->attr.mod_proc = 1; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| break; |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_syntax_error (ST_MODULE_PROC); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Match the beginning of a derived type declaration. If a type name |
| was the result of a function, then it is possible to have a symbol |
| already to be known as a derived type yet have no components. */ |
| |
| match |
| gfc_match_derived_decl (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| symbol_attribute attr; |
| gfc_symbol *sym; |
| match m; |
| |
| if (gfc_current_state () == COMP_DERIVED) |
| return MATCH_NO; |
| |
| gfc_clear_attr (&attr); |
| |
| loop: |
| if (gfc_match (" , private") == MATCH_YES) |
| { |
| if (gfc_find_state (COMP_MODULE) == FAILURE) |
| { |
| gfc_error |
| ("Derived type at %C can only be PRIVATE within a MODULE"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_add_access (&attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
| return MATCH_ERROR; |
| goto loop; |
| } |
| |
| if (gfc_match (" , public") == MATCH_YES) |
| { |
| if (gfc_find_state (COMP_MODULE) == FAILURE) |
| { |
| gfc_error ("Derived type at %C can only be PUBLIC within a MODULE"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_add_access (&attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
| return MATCH_ERROR; |
| goto loop; |
| } |
| |
| if (gfc_match (" ::") != MATCH_YES && attr.access != ACCESS_UNKNOWN) |
| { |
| gfc_error ("Expected :: in TYPE definition at %C"); |
| return MATCH_ERROR; |
| } |
| |
| m = gfc_match (" %n%t", name); |
| if (m != MATCH_YES) |
| return m; |
| |
| /* Make sure the name isn't the name of an intrinsic type. The |
| 'double precision' type doesn't get past the name matcher. */ |
| if (strcmp (name, "integer") == 0 |
| || strcmp (name, "real") == 0 |
| || strcmp (name, "character") == 0 |
| || strcmp (name, "logical") == 0 |
| || strcmp (name, "complex") == 0) |
| { |
| gfc_error |
| ("Type name '%s' at %C cannot be the same as an intrinsic type", |
| name); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_get_symbol (name, NULL, &sym)) |
| return MATCH_ERROR; |
| |
| if (sym->ts.type != BT_UNKNOWN) |
| { |
| gfc_error ("Derived type name '%s' at %C already has a basic type " |
| "of %s", sym->name, gfc_typename (&sym->ts)); |
| return MATCH_ERROR; |
| } |
| |
| /* The symbol may already have the derived attribute without the |
| components. The ways this can happen is via a function |
| definition, an INTRINSIC statement or a subtype in another |
| derived type that is a pointer. The first part of the AND clause |
| is true if a the symbol is not the return value of a function. */ |
| if (sym->attr.flavor != FL_DERIVED |
| && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (sym->components != NULL) |
| { |
| gfc_error |
| ("Derived type definition of '%s' at %C has already been defined", |
| sym->name); |
| return MATCH_ERROR; |
| } |
| |
| if (attr.access != ACCESS_UNKNOWN |
| && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| gfc_new_block = sym; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Cray Pointees can be declared as: |
| pointer (ipt, a (n,m,...,*)) |
| By default, this is treated as an AS_ASSUMED_SIZE array. We'll |
| cheat and set a constant bound of 1 for the last dimension, if this |
| is the case. Since there is no bounds-checking for Cray Pointees, |
| this will be okay. */ |
| |
| try |
| gfc_mod_pointee_as (gfc_array_spec *as) |
| { |
| as->cray_pointee = true; /* This will be useful to know later. */ |
| if (as->type == AS_ASSUMED_SIZE) |
| { |
| as->type = AS_EXPLICIT; |
| as->upper[as->rank - 1] = gfc_int_expr (1); |
| as->cp_was_assumed = true; |
| } |
| else if (as->type == AS_ASSUMED_SHAPE) |
| { |
| gfc_error ("Cray Pointee at %C cannot be assumed shape array"); |
| return MATCH_ERROR; |
| } |
| return MATCH_YES; |
| } |
| |
| |
| /* Match the enum definition statement, here we are trying to match |
| the first line of enum definition statement. |
| Returns MATCH_YES if match is found. */ |
| |
| match |
| gfc_match_enum (void) |
| { |
| match m; |
| |
| m = gfc_match_eos (); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (gfc_notify_std (GFC_STD_F2003, |
| "New in Fortran 2003: ENUM and ENUMERATOR at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a variable name with an optional initializer. When this |
| subroutine is called, a variable is expected to be parsed next. |
| Depending on what is happening at the moment, updates either the |
| symbol table or the current interface. */ |
| |
| static match |
| enumerator_decl (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_expr *initializer; |
| gfc_array_spec *as = NULL; |
| gfc_symbol *sym; |
| locus var_locus; |
| match m; |
| try t; |
| locus old_locus; |
| |
| initializer = NULL; |
| old_locus = gfc_current_locus; |
| |
| /* When we get here, we've just matched a list of attributes and |
| maybe a type and a double colon. The next thing we expect to see |
| is the name of the symbol. */ |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| var_locus = gfc_current_locus; |
| |
| /* OK, we've successfully matched the declaration. Now put the |
| symbol in the current namespace. If we fail to create the symbol, |
| bail out. */ |
| if (build_sym (name, NULL, &as, &var_locus) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| /* The double colon must be present in order to have initializers. |
| Otherwise the statement is ambiguous with an assignment statement. */ |
| if (colon_seen) |
| { |
| if (gfc_match_char ('=') == MATCH_YES) |
| { |
| m = gfc_match_init_expr (&initializer); |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Expected an initialization expression at %C"); |
| m = MATCH_ERROR; |
| } |
| |
| if (m != MATCH_YES) |
| goto cleanup; |
| } |
| } |
| |
| /* If we do not have an initializer, the initialization value of the |
| previous enumerator (stored in last_initializer) is incremented |
| by 1 and is used to initialize the current enumerator. */ |
| if (initializer == NULL) |
| initializer = gfc_enum_initializer (last_initializer, old_locus); |
| |
| if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
| { |
| gfc_error("ENUMERATOR %L not initialized with integer expression", |
| &var_locus); |
| m = MATCH_ERROR; |
| gfc_free_enum_history (); |
| goto cleanup; |
| } |
| |
| /* Store this current initializer, for the next enumerator variable |
| to be parsed. add_init_expr_to_sym() zeros initializer, so we |
| use last_initializer below. */ |
| last_initializer = initializer; |
| t = add_init_expr_to_sym (name, &initializer, &var_locus); |
| |
| /* Maintain enumerator history. */ |
| gfc_find_symbol (name, NULL, 0, &sym); |
| create_enum_history (sym, last_initializer); |
| |
| return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; |
| |
| cleanup: |
| /* Free stuff up and return. */ |
| gfc_free_expr (initializer); |
| |
| return m; |
| } |
| |
| |
| /* Match the enumerator definition statement. */ |
| |
| match |
| gfc_match_enumerator_def (void) |
| { |
| match m; |
| try t; |
| |
| gfc_clear_ts (¤t_ts); |
| |
| m = gfc_match (" enumerator"); |
| if (m != MATCH_YES) |
| return m; |
| |
| m = gfc_match (" :: "); |
| if (m == MATCH_ERROR) |
| return m; |
| |
| colon_seen = (m == MATCH_YES); |
| |
| if (gfc_current_state () != COMP_ENUM) |
| { |
| gfc_error ("ENUM definition statement expected before %C"); |
| gfc_free_enum_history (); |
| return MATCH_ERROR; |
| } |
| |
| (¤t_ts)->type = BT_INTEGER; |
| (¤t_ts)->kind = gfc_c_int_kind; |
| |
| gfc_clear_attr (¤t_attr); |
| t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); |
| if (t == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| for (;;) |
| { |
| m = enumerator_decl (); |
| if (m == MATCH_ERROR) |
| goto cleanup; |
| if (m == MATCH_NO) |
| break; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| goto cleanup; |
| if (gfc_match_char (',') != MATCH_YES) |
| break; |
| } |
| |
| if (gfc_current_state () == COMP_ENUM) |
| { |
| gfc_free_enum_history (); |
| gfc_error ("Syntax error in ENUMERATOR definition at %C"); |
| m = MATCH_ERROR; |
| } |
| |
| cleanup: |
| gfc_free_array_spec (current_as); |
| current_as = NULL; |
| return m; |
| |
| } |
| |