| /* Declaration statement matcher |
| Copyright (C) 2002-2013 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 3, 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 COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "gfortran.h" |
| #include "match.h" |
| #include "parse.h" |
| #include "flags.h" |
| #include "constructor.h" |
| #include "tree.h" |
| |
| /* Macros to access allocate memory for gfc_data_variable, |
| gfc_data_value and gfc_data. */ |
| #define gfc_get_data_variable() XCNEW (gfc_data_variable) |
| #define gfc_get_data_value() XCNEW (gfc_data_value) |
| #define gfc_get_data() XCNEW (gfc_data) |
| |
| |
| static gfc_try set_binding_label (const char **, const char *, int); |
| |
| |
| /* 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; |
| |
| /* The current binding label (if any). */ |
| static const char* curr_binding_label; |
| /* Need to know how many identifiers are on the current data declaration |
| line in case we're given the BIND(C) attribute with a NAME= specifier. */ |
| static int num_idents_on_line; |
| /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we |
| can supply a name if the curr_binding_label is nil and NAME= was not. */ |
| static int has_name_equals = 0; |
| |
| /* 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; |
| |
| bool gfc_matching_function; |
| |
| |
| /********************* DATA statement subroutines *********************/ |
| |
| static bool in_match_data = false; |
| |
| bool |
| gfc_in_match_data (void) |
| { |
| return in_match_data; |
| } |
| |
| static void |
| 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); |
| 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; |
| mpz_clear (p->repeat); |
| gfc_free_expr (p->expr); |
| 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); |
| free (p); |
| } |
| } |
| |
| |
| /* Free all data in a namespace. */ |
| |
| static void |
| gfc_free_data_all (gfc_namespace *ns) |
| { |
| gfc_data *d; |
| |
| for (;ns->data;) |
| { |
| d = ns->data->next; |
| free (ns->data); |
| ns->data = d; |
| } |
| } |
| |
| |
| 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_var) |
| { |
| match m; |
| gfc_symbol *sym; |
| |
| memset (new_var, 0, sizeof (gfc_data_variable)); |
| |
| if (gfc_match_char ('(') == MATCH_YES) |
| return var_list (new_var); |
| |
| m = gfc_match_variable (&new_var->expr, 0); |
| if (m != MATCH_YES) |
| return m; |
| |
| sym = new_var->expr->symtree->n.sym; |
| |
| /* Symbol should already have an associated type. */ |
| if (gfc_check_symbol_typed (sym, gfc_current_ns, |
| false, gfc_current_locus) == FAILURE) |
| return MATCH_ERROR; |
| |
| 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, "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_var->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_var; |
| match m; |
| |
| tail = NULL; |
| |
| for (;;) |
| { |
| m = var_element (&var); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| new_var = gfc_get_data_variable (); |
| *new_var = var; |
| |
| if (tail == NULL) |
| d->var = new_var; |
| else |
| tail->next = new_var; |
| |
| tail = new_var; |
| |
| if (gfc_match_char ('/') == MATCH_YES) |
| break; |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_syntax_error (ST_DATA); |
| gfc_free_data_all (gfc_current_ns); |
| return MATCH_ERROR; |
| } |
| |
| |
| static match |
| match_data_constant (gfc_expr **result) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *sym, *dt_sym = NULL; |
| gfc_expr *expr; |
| match m; |
| locus old_loc; |
| |
| 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; |
| |
| old_loc = gfc_current_locus; |
| |
| /* Should this be a structure component, try to match it |
| before matching a name. */ |
| m = gfc_match_rvalue (result); |
| if (m == MATCH_ERROR) |
| return m; |
| |
| if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) |
| { |
| if (gfc_simplify_expr (*result, 0) == FAILURE) |
| m = MATCH_ERROR; |
| return m; |
| } |
| else if (m == MATCH_YES) |
| gfc_free_expr (*result); |
| |
| gfc_current_locus = old_loc; |
| |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (gfc_find_symbol (name, NULL, 1, &sym)) |
| return MATCH_ERROR; |
| |
| if (sym && sym->attr.generic) |
| dt_sym = gfc_find_dt_in_generic (sym); |
| |
| if (sym == NULL |
| || (sym->attr.flavor != FL_PARAMETER |
| && (!dt_sym || dt_sym->attr.flavor != FL_DERIVED))) |
| { |
| gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", |
| name); |
| return MATCH_ERROR; |
| } |
| else if (dt_sym && dt_sym->attr.flavor == FL_DERIVED) |
| return gfc_match_structure_constructor (dt_sym, result); |
| |
| /* Check to see if the value is an initialization array expression. */ |
| if (sym->value->expr_type == EXPR_ARRAY) |
| { |
| gfc_current_locus = old_loc; |
| |
| m = gfc_match_init_expr (result); |
| if (m == MATCH_ERROR) |
| return m; |
| |
| if (m == MATCH_YES) |
| { |
| if (gfc_simplify_expr (*result, 0) == FAILURE) |
| m = MATCH_ERROR; |
| |
| if ((*result)->expr_type == EXPR_CONSTANT) |
| return m; |
| else |
| { |
| gfc_error ("Invalid initializer %s in Data statement at %C", name); |
| return MATCH_ERROR; |
| } |
| } |
| } |
| |
| *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_val, *tail; |
| gfc_expr *expr; |
| match m; |
| |
| tail = NULL; |
| |
| for (;;) |
| { |
| m = match_data_constant (&expr); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| new_val = gfc_get_data_value (); |
| mpz_init (new_val->repeat); |
| |
| if (tail == NULL) |
| data->value = new_val; |
| else |
| tail->next = new_val; |
| |
| tail = new_val; |
| |
| if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) |
| { |
| tail->expr = expr; |
| mpz_set_ui (tail->repeat, 1); |
| } |
| else |
| { |
| mpz_set (tail->repeat, expr->value.integer); |
| gfc_free_expr (expr); |
| |
| 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); |
| gfc_free_data_all (gfc_current_ns); |
| 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) |
| { |
| free (newdata); |
| return m; |
| } |
| |
| if (gfc_pure (NULL)) |
| { |
| gfc_error ("Initialization at %C is not allowed in a PURE procedure"); |
| free (newdata); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_implicit_pure (NULL)) |
| gfc_current_ns->proc_name->attr.implicit_pure = 0; |
| |
| /* Mark the variable as having appeared in a data statement. */ |
| if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) |
| { |
| 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_data; |
| match m; |
| |
| set_in_match_data (true); |
| |
| for (;;) |
| { |
| new_data = gfc_get_data (); |
| new_data->where = gfc_current_locus; |
| |
| m = top_var_list (new_data); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| m = top_val_list (new_data); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| new_data->next = gfc_current_ns->data; |
| gfc_current_ns->data = new_data; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| break; |
| |
| gfc_match_char (','); /* Optional comma */ |
| } |
| |
| 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; |
| } |
| |
| if (gfc_implicit_pure (NULL)) |
| gfc_current_ns->proc_name->attr.implicit_pure = 0; |
| |
| return MATCH_YES; |
| |
| cleanup: |
| set_in_match_data (false); |
| gfc_free_data (new_data); |
| return MATCH_ERROR; |
| } |
| |
| |
| /************************ Declaration statements *********************/ |
| |
| |
| /* Auxiliary function to merge DIMENSION and CODIMENSION array specs. */ |
| |
| static gfc_try |
| merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy) |
| { |
| int i; |
| |
| if ((from->type == AS_ASSUMED_RANK && to->corank) |
| || (to->type == AS_ASSUMED_RANK && from->corank)) |
| { |
| gfc_error ("The assumed-rank array at %C shall not have a codimension"); |
| return FAILURE; |
| } |
| |
| if (to->rank == 0 && from->rank > 0) |
| { |
| to->rank = from->rank; |
| to->type = from->type; |
| to->cray_pointee = from->cray_pointee; |
| to->cp_was_assumed = from->cp_was_assumed; |
| |
| for (i = 0; i < to->corank; i++) |
| { |
| to->lower[from->rank + i] = to->lower[i]; |
| to->upper[from->rank + i] = to->upper[i]; |
| } |
| for (i = 0; i < from->rank; i++) |
| { |
| if (copy) |
| { |
| to->lower[i] = gfc_copy_expr (from->lower[i]); |
| to->upper[i] = gfc_copy_expr (from->upper[i]); |
| } |
| else |
| { |
| to->lower[i] = from->lower[i]; |
| to->upper[i] = from->upper[i]; |
| } |
| } |
| } |
| else if (to->corank == 0 && from->corank > 0) |
| { |
| to->corank = from->corank; |
| to->cotype = from->cotype; |
| |
| for (i = 0; i < from->corank; i++) |
| { |
| if (copy) |
| { |
| to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]); |
| to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]); |
| } |
| else |
| { |
| to->lower[to->rank + i] = from->lower[i]; |
| to->upper[to->rank + i] = from->upper[i]; |
| } |
| } |
| } |
| |
| return SUCCESS; |
| } |
| |
| |
| /* 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 ':'. */ |
| |
| static match |
| char_len_param_value (gfc_expr **expr, bool *deferred) |
| { |
| match m; |
| |
| *expr = NULL; |
| *deferred = false; |
| |
| if (gfc_match_char ('*') == MATCH_YES) |
| return MATCH_YES; |
| |
| if (gfc_match_char (':') == MATCH_YES) |
| { |
| if (gfc_notify_std (GFC_STD_F2003, "deferred type " |
| "parameter at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| *deferred = true; |
| |
| return MATCH_YES; |
| } |
| |
| m = gfc_match_expr (expr); |
| |
| if (m == MATCH_YES |
| && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
| { |
| if ((*expr)->value.function.actual |
| && (*expr)->value.function.actual->expr->symtree) |
| { |
| gfc_expr *e; |
| e = (*expr)->value.function.actual->expr; |
| if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE |
| && e->expr_type == EXPR_VARIABLE) |
| { |
| if (e->symtree->n.sym->ts.type == BT_UNKNOWN) |
| goto syntax; |
| if (e->symtree->n.sym->ts.type == BT_CHARACTER |
| && e->symtree->n.sym->ts.u.cl |
| && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN) |
| goto syntax; |
| } |
| } |
| } |
| return m; |
| |
| syntax: |
| gfc_error ("Conflict in attributes of function argument at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* 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, bool *deferred, bool obsolescent_check) |
| { |
| int length; |
| match m; |
| |
| *deferred = false; |
| 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) |
| { |
| if (obsolescent_check |
| && gfc_notify_std (GFC_STD_F95_OBS, |
| "Old-style character length at %C") == FAILURE) |
| return MATCH_ERROR; |
| *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length); |
| return m; |
| } |
| |
| if (gfc_match_char ('(') == MATCH_NO) |
| goto syntax; |
| |
| m = char_len_param_value (expr, deferred); |
| if (m != MATCH_YES && gfc_matching_function) |
| { |
| gfc_undo_symbols (); |
| m = MATCH_YES; |
| } |
| |
| 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, bool allow_subroutine) |
| { |
| gfc_state_data *s; |
| gfc_symtree *st; |
| int i; |
| |
| i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
| if (i == 0) |
| { |
| *result = st ? st->n.sym : NULL; |
| 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 = 0; |
| |
| /* 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) |
| { |
| /* Present if entry is declared to be a module procedure. */ |
| rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); |
| |
| if (*result == NULL) |
| rc = gfc_get_symbol (name, NULL, result); |
| else if (!gfc_get_symbol (name, NULL, &sym) && sym |
| && (*result)->ts.type == BT_UNKNOWN |
| && sym->attr.flavor == FL_UNKNOWN) |
| /* Pick up the typespec for the entry, if declared in the function |
| body. Note that this symbol is FL_UNKNOWN because it will |
| only have appeared in a type declaration. The local symtree |
| is set to point to the module symbol and a unique symtree |
| to the local version. This latter ensures a correct clearing |
| of the symbols. */ |
| { |
| /* If the ENTRY proceeds its specification, we need to ensure |
| that this does not raise a "has no IMPLICIT type" error. */ |
| if (sym->ts.type == BT_UNKNOWN) |
| sym->attr.untyped = 1; |
| |
| (*result)->ts = sym->ts; |
| |
| /* Put the symbol in the procedure namespace so that, should |
| the ENTRY precede its specification, the specification |
| can be applied. */ |
| (*result)->ns = gfc_current_ns; |
| |
| gfc_find_sym_tree (name, gfc_current_ns, 0, &st); |
| st->n.sym = *result; |
| st = gfc_get_unique_symtree (gfc_current_ns); |
| st->n.sym = sym; |
| } |
| } |
| else |
| rc = gfc_get_symbol (name, gfc_current_ns->parent, result); |
| |
| if (rc) |
| return rc; |
| |
| sym = *result; |
| |
| if (sym && !sym->gfc_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 a procedure with a name the same as interface in the |
| encompassing scope. */ |
| if (sym->attr.generic != 0 |
| && (sym->attr.subroutine || sym->attr.function) |
| && !sym->attr.mod_proc) |
| gfc_error_now ("Name '%s' at %C is already defined" |
| " as a generic interface 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) |
| { |
| /* Present if entry is declared to be a module procedure. */ |
| rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); |
| if (st == NULL) |
| 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 && sym->attr.proc != PROC_MODULE)) |
| && gfc_add_procedure (&sym->attr, PROC_MODULE, |
| sym->name, NULL) == FAILURE) |
| rc = 2; |
| |
| return rc; |
| } |
| |
| |
| /* Verify that the given symbol representing a parameter is C |
| interoperable, by checking to see if it was marked as such after |
| its declaration. If the given symbol is not interoperable, a |
| warning is reported, thus removing the need to return the status to |
| the calling function. The standard does not require the user use |
| one of the iso_c_binding named constants to declare an |
| interoperable parameter, but we can't be sure if the param is C |
| interop or not if the user doesn't. For example, integer(4) may be |
| legal Fortran, but doesn't have meaning in C. It may interop with |
| a number of the C types, which causes a problem because the |
| compiler can't know which one. This code is almost certainly not |
| portable, and the user will get what they deserve if the C type |
| across platforms isn't always interoperable with integer(4). If |
| the user had used something like integer(c_int) or integer(c_long), |
| the compiler could have automatically handled the varying sizes |
| across platforms. */ |
| |
| gfc_try |
| gfc_verify_c_interop_param (gfc_symbol *sym) |
| { |
| int is_c_interop = 0; |
| gfc_try retval = SUCCESS; |
| |
| /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). |
| Don't repeat the checks here. */ |
| if (sym->attr.implicit_type) |
| return SUCCESS; |
| |
| /* For subroutines or functions that are passed to a BIND(C) procedure, |
| they're interoperable if they're BIND(C) and their params are all |
| interoperable. */ |
| if (sym->attr.flavor == FL_PROCEDURE) |
| { |
| if (sym->attr.is_bind_c == 0) |
| { |
| gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " |
| "attribute to be C interoperable", sym->name, |
| &(sym->declared_at)); |
| |
| return FAILURE; |
| } |
| else |
| { |
| if (sym->attr.is_c_interop == 1) |
| /* We've already checked this procedure; don't check it again. */ |
| return SUCCESS; |
| else |
| return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, |
| sym->common_block); |
| } |
| } |
| |
| /* See if we've stored a reference to a procedure that owns sym. */ |
| if (sym->ns != NULL && sym->ns->proc_name != NULL) |
| { |
| if (sym->ns->proc_name->attr.is_bind_c == 1) |
| { |
| is_c_interop = (gfc_verify_c_interop (&(sym->ts)) == SUCCESS ? 1 : 0); |
| |
| if (is_c_interop != 1) |
| { |
| /* Make personalized messages to give better feedback. */ |
| if (sym->ts.type == BT_DERIVED) |
| gfc_error ("Variable '%s' at %L is a dummy argument to the " |
| "BIND(C) procedure '%s' but is not C interoperable " |
| "because derived type '%s' is not C interoperable", |
| sym->name, &(sym->declared_at), |
| sym->ns->proc_name->name, |
| sym->ts.u.derived->name); |
| else if (sym->ts.type == BT_CLASS) |
| gfc_error ("Variable '%s' at %L is a dummy argument to the " |
| "BIND(C) procedure '%s' but is not C interoperable " |
| "because it is polymorphic", |
| sym->name, &(sym->declared_at), |
| sym->ns->proc_name->name); |
| else if (gfc_option.warn_c_binding_type) |
| gfc_warning ("Variable '%s' at %L is a dummy argument of the " |
| "BIND(C) procedure '%s' but may not be C " |
| "interoperable", |
| sym->name, &(sym->declared_at), |
| sym->ns->proc_name->name); |
| } |
| |
| /* Character strings are only C interoperable if they have a |
| length of 1. */ |
| if (sym->ts.type == BT_CHARACTER) |
| { |
| gfc_charlen *cl = sym->ts.u.cl; |
| if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT |
| || mpz_cmp_si (cl->length->value.integer, 1) != 0) |
| { |
| gfc_error ("Character argument '%s' at %L " |
| "must be length 1 because " |
| "procedure '%s' is BIND(C)", |
| sym->name, &sym->declared_at, |
| sym->ns->proc_name->name); |
| retval = FAILURE; |
| } |
| } |
| |
| /* We have to make sure that any param to a bind(c) routine does |
| not have the allocatable, pointer, or optional attributes, |
| according to J3/04-007, section 5.1. */ |
| if (sym->attr.allocatable == 1) |
| { |
| gfc_error ("Variable '%s' at %L cannot have the " |
| "ALLOCATABLE attribute because procedure '%s'" |
| " is BIND(C)", sym->name, &(sym->declared_at), |
| sym->ns->proc_name->name); |
| retval = FAILURE; |
| } |
| |
| if (sym->attr.pointer == 1) |
| { |
| gfc_error ("Variable '%s' at %L cannot have the " |
| "POINTER attribute because procedure '%s'" |
| " is BIND(C)", sym->name, &(sym->declared_at), |
| sym->ns->proc_name->name); |
| retval = FAILURE; |
| } |
| |
| if (sym->attr.optional == 1 && sym->attr.value) |
| { |
| gfc_error ("Variable '%s' at %L cannot have both the OPTIONAL " |
| "and the VALUE attribute because procedure '%s' " |
| "is BIND(C)", sym->name, &(sym->declared_at), |
| sym->ns->proc_name->name); |
| retval = FAILURE; |
| } |
| else if (sym->attr.optional == 1 |
| && gfc_notify_std (GFC_STD_F2008_TS, "Variable '%s' " |
| "at %L with OPTIONAL attribute in " |
| "procedure '%s' which is BIND(C)", |
| sym->name, &(sym->declared_at), |
| sym->ns->proc_name->name) |
| == FAILURE) |
| retval = FAILURE; |
| |
| /* Make sure that if it has the dimension attribute, that it is |
| either assumed size or explicit shape. Deferred shape is already |
| covered by the pointer/allocatable attribute. */ |
| if (sym->as != NULL && sym->as->type == AS_ASSUMED_SHAPE |
| && gfc_notify_std (GFC_STD_F2008_TS, "Assumed-shape array '%s' " |
| "at %L as dummy argument to the BIND(C) " |
| "procedure '%s' at %L", sym->name, |
| &(sym->declared_at), sym->ns->proc_name->name, |
| &(sym->ns->proc_name->declared_at)) == FAILURE) |
| retval = FAILURE; |
| } |
| } |
| |
| return retval; |
| } |
| |
| |
| |
| /* Function called by variable_decl() that adds a name to the symbol table. */ |
| |
| static gfc_try |
| build_sym (const char *name, gfc_charlen *cl, bool cl_deferred, |
| gfc_array_spec **as, locus *var_locus) |
| { |
| symbol_attribute attr; |
| gfc_symbol *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.u.cl = cl; |
| sym->ts.deferred = cl_deferred; |
| } |
| |
| /* 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; |
| attr.codimension = 0; |
| |
| if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) |
| return FAILURE; |
| |
| /* Finish any work that may need to be done for the binding label, |
| if it's a bind(c). The bind(c) attr is found before the symbol |
| is made, and before the symbol name (for data decls), so the |
| current_ts is holding the binding label, or nothing if the |
| name= attr wasn't given. Therefore, test here if we're dealing |
| with a bind(c) and make sure the binding label is set correctly. */ |
| if (sym->attr.is_bind_c == 1) |
| { |
| if (!sym->binding_label) |
| { |
| /* Set the binding label and verify that if a NAME= was specified |
| then only one identifier was in the entity-decl-list. */ |
| if (set_binding_label (&sym->binding_label, sym->name, |
| num_idents_on_line) == FAILURE) |
| return FAILURE; |
| } |
| } |
| |
| /* See if we know we're in a common block, and if it's a bind(c) |
| common then we need to make sure we're an interoperable type. */ |
| if (sym->attr.in_common == 1) |
| { |
| /* Test the common block object. */ |
| if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 |
| && sym->ts.is_c_interop != 1) |
| { |
| gfc_error_now ("Variable '%s' in common block '%s' at %C " |
| "must be declared with a C interoperable " |
| "kind since common block '%s' is BIND(C)", |
| sym->name, sym->common_block->name, |
| sym->common_block->name); |
| gfc_clear_error (); |
| } |
| } |
| |
| sym->attr.implied_index = 0; |
| |
| if (sym->ts.type == BT_CLASS) |
| return gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false); |
| |
| return SUCCESS; |
| } |
| |
| |
| /* Set character constant to the given length. The constant will be padded or |
| truncated. If we're inside an array constructor without a typespec, we |
| additionally check that all elements have the same length; check_len -1 |
| means no checking. */ |
| |
| void |
| gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
| { |
| gfc_char_t *s; |
| int slen; |
| |
| gcc_assert (expr->expr_type == EXPR_CONSTANT); |
| gcc_assert (expr->ts.type == BT_CHARACTER); |
| |
| slen = expr->value.character.length; |
| if (len != slen) |
| { |
| s = gfc_get_wide_string (len + 1); |
| memcpy (s, expr->value.character.string, |
| MIN (len, slen) * sizeof (gfc_char_t)); |
| if (len > slen) |
| gfc_wide_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 (check_len != -1 && slen != check_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, check_len); |
| |
| s[len] = '\0'; |
| 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 = XCNEW (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; |
| free (current); |
| current = next; |
| } |
| max_enum = NULL; |
| enum_history = NULL; |
| } |
| |
| |
| /* Function called by variable_decl() that adds an initialization |
| expression to a symbol. */ |
| |
| static gfc_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, false)) |
| 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 (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 derived type variables and procedure pointers. */ |
| if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
| && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS |
| && !sym->attr.proc_pointer |
| && gfc_check_assign_symbol (sym, NULL, init) == FAILURE) |
| return FAILURE; |
| |
| if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl |
| && init->ts.type == BT_CHARACTER) |
| { |
| /* Update symbol character length according initializer. */ |
| if (gfc_check_assign_symbol (sym, NULL, init) == FAILURE) |
| return FAILURE; |
| |
| if (sym->ts.u.cl->length == NULL) |
| { |
| int clen; |
| /* If there are multiple CHARACTER variables declared on the |
| same line, we don't want them to share the same length. */ |
| sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
| |
| if (sym->attr.flavor == FL_PARAMETER) |
| { |
| if (init->expr_type == EXPR_CONSTANT) |
| { |
| clen = init->value.character.length; |
| sym->ts.u.cl->length |
| = gfc_get_int_expr (gfc_default_integer_kind, |
| NULL, clen); |
| } |
| else if (init->expr_type == EXPR_ARRAY) |
| { |
| gfc_constructor *c; |
| c = gfc_constructor_first (init->value.constructor); |
| clen = c->expr->value.character.length; |
| sym->ts.u.cl->length |
| = gfc_get_int_expr (gfc_default_integer_kind, |
| NULL, clen); |
| } |
| else if (init->ts.u.cl && init->ts.u.cl->length) |
| sym->ts.u.cl->length = |
| gfc_copy_expr (sym->value->ts.u.cl->length); |
| } |
| } |
| /* Update initializer character length according symbol. */ |
| else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
| { |
| int len = mpz_get_si (sym->ts.u.cl->length->value.integer); |
| |
| if (init->expr_type == EXPR_CONSTANT) |
| gfc_set_constant_character_len (len, init, -1); |
| else if (init->expr_type == EXPR_ARRAY) |
| { |
| gfc_constructor *c; |
| |
| /* Build a new charlen to prevent simplification from |
| deleting the length before it is resolved. */ |
| init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
| init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length); |
| |
| for (c = gfc_constructor_first (init->value.constructor); |
| c; c = gfc_constructor_next (c)) |
| gfc_set_constant_character_len (len, c->expr, -1); |
| } |
| } |
| } |
| |
| /* If sym is implied-shape, set its upper bounds from init. */ |
| if (sym->attr.flavor == FL_PARAMETER && sym->attr.dimension |
| && sym->as->type == AS_IMPLIED_SHAPE) |
| { |
| int dim; |
| |
| if (init->rank == 0) |
| { |
| gfc_error ("Can't initialize implied-shape array at %L" |
| " with scalar", &sym->declared_at); |
| return FAILURE; |
| } |
| gcc_assert (sym->as->rank == init->rank); |
| |
| /* Shape should be present, we get an initialization expression. */ |
| gcc_assert (init->shape); |
| |
| for (dim = 0; dim < sym->as->rank; ++dim) |
| { |
| int k; |
| gfc_expr* lower; |
| gfc_expr* e; |
| |
| lower = sym->as->lower[dim]; |
| if (lower->expr_type != EXPR_CONSTANT) |
| { |
| gfc_error ("Non-constant lower bound in implied-shape" |
| " declaration at %L", &lower->where); |
| return FAILURE; |
| } |
| |
| /* All dimensions must be without upper bound. */ |
| gcc_assert (!sym->as->upper[dim]); |
| |
| k = lower->ts.kind; |
| e = gfc_get_constant_expr (BT_INTEGER, k, &sym->declared_at); |
| mpz_add (e->value.integer, |
| lower->value.integer, init->shape[dim]); |
| mpz_sub_ui (e->value.integer, e->value.integer, 1); |
| sym->as->upper[dim] = e; |
| } |
| |
| sym->as->type = AS_EXPLICIT; |
| } |
| |
| /* Need to check if the expression we initialized this |
| to was one of the iso_c_binding named constants. If so, |
| and we're a parameter (constant), let it be iso_c. |
| For example: |
| integer(c_int), parameter :: my_int = c_int |
| integer(my_int) :: my_int_2 |
| If we mark my_int as iso_c (since we can see it's value |
| is equal to one of the named constants), then my_int_2 |
| will be considered C interoperable. */ |
| if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) |
| { |
| sym->ts.is_iso_c |= init->ts.is_iso_c; |
| sym->ts.is_c_interop |= init->ts.is_c_interop; |
| /* attr bits needed for module files. */ |
| sym->attr.is_iso_c |= init->ts.is_iso_c; |
| sym->attr.is_c_interop |= init->ts.is_c_interop; |
| if (init->ts.is_iso_c) |
| sym->ts.f90_type = init->ts.f90_type; |
| } |
| |
| /* Add initializer. Make sure we keep the ranks sane. */ |
| if (sym->attr.dimension && init->rank == 0) |
| { |
| mpz_t size; |
| gfc_expr *array; |
| int n; |
| if (sym->attr.flavor == FL_PARAMETER |
| && init->expr_type == EXPR_CONSTANT |
| && spec_size (sym->as, &size) == SUCCESS |
| && mpz_cmp_si (size, 0) > 0) |
| { |
| array = gfc_get_array_expr (init->ts.type, init->ts.kind, |
| &init->where); |
| for (n = 0; n < (int)mpz_get_si (size); n++) |
| gfc_constructor_append_expr (&array->value.constructor, |
| n == 0 |
| ? init |
| : gfc_copy_expr (init), |
| &init->where); |
| |
| array->shape = gfc_get_shape (sym->as->rank); |
| for (n = 0; n < sym->as->rank; n++) |
| spec_dimen_size (sym->as, n, &array->shape[n]); |
| |
| init = array; |
| mpz_clear (size); |
| } |
| init->rank = sym->as->rank; |
| } |
| |
| sym->value = init; |
| if (sym->attr.save == SAVE_NONE) |
| sym->attr.save = SAVE_IMPLICIT; |
| *initp = NULL; |
| } |
| |
| return SUCCESS; |
| } |
| |
| |
| /* Function called by variable_decl() that adds a name to a structure |
| being built. */ |
| |
| static gfc_try |
| build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
| gfc_array_spec **as) |
| { |
| gfc_component *c; |
| gfc_try t = SUCCESS; |
| |
| /* F03:C438/C439. 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.type == BT_CLASS) |
| && current_ts.u.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; |
| if (c->ts.type == BT_CHARACTER) |
| c->ts.u.cl = cl; |
| c->attr = current_attr; |
| |
| c->initializer = *init; |
| *init = NULL; |
| |
| c->as = *as; |
| if (c->as != NULL) |
| { |
| if (c->as->corank) |
| c->attr.codimension = 1; |
| if (c->as->rank) |
| c->attr.dimension = 1; |
| } |
| *as = NULL; |
| |
| /* Should this ever get more complicated, combine with similar section |
| in add_init_expr_to_sym into a separate function. */ |
| if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer |
| && c->ts.u.cl |
| && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
| { |
| int len; |
| |
| gcc_assert (c->ts.u.cl && c->ts.u.cl->length); |
| gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT); |
| gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER); |
| |
| len = mpz_get_si (c->ts.u.cl->length->value.integer); |
| |
| if (c->initializer->expr_type == EXPR_CONSTANT) |
| gfc_set_constant_character_len (len, c->initializer, -1); |
| else if (mpz_cmp (c->ts.u.cl->length->value.integer, |
| c->initializer->ts.u.cl->length->value.integer)) |
| { |
| gfc_constructor *ctor; |
| ctor = gfc_constructor_first (c->initializer->value.constructor); |
| |
| if (ctor) |
| { |
| int first_len; |
| bool has_ts = (c->initializer->ts.u.cl |
| && c->initializer->ts.u.cl->length_from_typespec); |
| |
| /* Remember the length of the first element for checking |
| that all elements *in the constructor* have the same |
| length. This need not be the length of the LHS! */ |
| gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); |
| gcc_assert (ctor->expr->ts.type == BT_CHARACTER); |
| first_len = ctor->expr->value.character.length; |
| |
| for ( ; ctor; ctor = gfc_constructor_next (ctor)) |
| if (ctor->expr->expr_type == EXPR_CONSTANT) |
| { |
| gfc_set_constant_character_len (len, ctor->expr, |
| has_ts ? -1 : first_len); |
| ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length); |
| } |
| } |
| } |
| } |
| |
| /* Check array components. */ |
| if (!c->attr.dimension) |
| goto scalar; |
| |
| if (c->attr.pointer) |
| { |
| if (c->as->type != AS_DEFERRED) |
| { |
| gfc_error ("Pointer array component of structure at %C must have a " |
| "deferred shape"); |
| t = FAILURE; |
| } |
| } |
| else if (c->attr.allocatable) |
| { |
| if (c->as->type != AS_DEFERRED) |
| { |
| gfc_error ("Allocatable component of structure at %C must have a " |
| "deferred shape"); |
| t = FAILURE; |
| } |
| } |
| else |
| { |
| if (c->as->type != AS_EXPLICIT) |
| { |
| gfc_error ("Array component of structure at %C must have an " |
| "explicit shape"); |
| t = FAILURE; |
| } |
| } |
| |
| scalar: |
| if (c->ts.type == BT_CLASS) |
| { |
| bool delayed = (gfc_state_stack->sym == c->ts.u.derived) |
| || (!c->ts.u.derived->components |
| && !c->ts.u.derived->attr.zero_comp); |
| gfc_try t2 = gfc_build_class_symbol (&c->ts, &c->attr, &c->as, delayed); |
| |
| if (t != FAILURE) |
| t = t2; |
| } |
| |
| return t; |
| } |
| |
| |
| /* Match a 'NULL()', and possibly take care of some side effects. */ |
| |
| match |
| gfc_match_null (gfc_expr **result) |
| { |
| gfc_symbol *sym; |
| match m, m2 = MATCH_NO; |
| |
| if ((m = gfc_match (" null ( )")) == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| if (m == MATCH_NO) |
| { |
| locus old_loc; |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| |
| if ((m2 = gfc_match (" null (")) != MATCH_YES) |
| return m2; |
| |
| old_loc = gfc_current_locus; |
| if ((m2 = gfc_match (" %n ) ", name)) == MATCH_ERROR) |
| return MATCH_ERROR; |
| if (m2 != MATCH_YES |
| && ((m2 = gfc_match (" mold = %n )", name)) == MATCH_ERROR)) |
| return MATCH_ERROR; |
| if (m2 == MATCH_NO) |
| { |
| gfc_current_locus = old_loc; |
| return MATCH_NO; |
| } |
| } |
| |
| /* 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; |
| |
| *result = gfc_get_null_expr (&gfc_current_locus); |
| |
| /* Invalid per F2008, C512. */ |
| if (m2 == MATCH_YES) |
| { |
| gfc_error ("NULL() initialization at %C may not have MOLD"); |
| return MATCH_ERROR; |
| } |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match the initialization expr for a data pointer or procedure pointer. */ |
| |
| static match |
| match_pointer_init (gfc_expr **init, int procptr) |
| { |
| match m; |
| |
| if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED) |
| { |
| gfc_error ("Initialization of pointer at %C is not allowed in " |
| "a PURE procedure"); |
| return MATCH_ERROR; |
| } |
| |
| /* Match NULL() initialization. */ |
| m = gfc_match_null (init); |
| if (m != MATCH_NO) |
| return m; |
| |
| /* Match non-NULL initialization. */ |
| gfc_matching_ptr_assignment = !procptr; |
| gfc_matching_procptr_assignment = procptr; |
| m = gfc_match_rvalue (init); |
| gfc_matching_ptr_assignment = 0; |
| gfc_matching_procptr_assignment = 0; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| else if (m == MATCH_NO) |
| { |
| gfc_error ("Error in pointer initialization at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (!procptr) |
| gfc_resolve_expr (*init); |
| |
| if (gfc_notify_std (GFC_STD_F2008, "non-NULL pointer " |
| "initialization at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| return MATCH_YES; |
| } |
| |
| |
| static gfc_try |
| check_function_name (char *name) |
| { |
| /* 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. When checking this, be careful about |
| 'hidden' procedure pointer results ('ppr@'). */ |
| |
| if (gfc_current_state () == COMP_FUNCTION) |
| { |
| gfc_symbol *block = gfc_current_block (); |
| if (block && block->result && block->result != block |
| && strcmp (block->result->name, "ppr@") != 0 |
| && strcmp (block->name, name) == 0) |
| { |
| gfc_error ("Function name '%s' not allowed at %C", name); |
| return FAILURE; |
| } |
| } |
| |
| return SUCCESS; |
| } |
| |
| |
| /* 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; |
| bool cl_deferred; |
| locus var_locus; |
| match m; |
| gfc_try t; |
| gfc_symbol *sym; |
| |
| initializer = NULL; |
| as = NULL; |
| cp_as = NULL; |
| |
| /* 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, true, true); |
| if (m == MATCH_ERROR) |
| goto cleanup; |
| |
| if (m == MATCH_NO) |
| as = gfc_copy_array_spec (current_as); |
| else if (current_as |
| && merge_array_spec (current_as, as, true) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (gfc_option.flag_cray_pointer) |
| cp_as = gfc_copy_array_spec (as); |
| |
| /* At this point, we know for sure if the symbol is PARAMETER and can thus |
| determine (and check) whether it can be implied-shape. If it |
| was parsed as assumed-size, change it because PARAMETERs can not |
| be assumed-size. */ |
| if (as) |
| { |
| if (as->type == AS_IMPLIED_SHAPE && current_attr.flavor != FL_PARAMETER) |
| { |
| m = MATCH_ERROR; |
| gfc_error ("Non-PARAMETER symbol '%s' at %L can't be implied-shape", |
| name, &var_locus); |
| goto cleanup; |
| } |
| |
| if (as->type == AS_ASSUMED_SIZE && as->rank == 1 |
| && current_attr.flavor == FL_PARAMETER) |
| as->type = AS_IMPLIED_SHAPE; |
| |
| if (as->type == AS_IMPLIED_SHAPE |
| && gfc_notify_std (GFC_STD_F2008, |
| "Implied-shape array at %L", |
| &var_locus) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| |
| char_len = NULL; |
| cl = NULL; |
| cl_deferred = false; |
| |
| if (current_ts.type == BT_CHARACTER) |
| { |
| switch (match_char_length (&char_len, &cl_deferred, false)) |
| { |
| case MATCH_YES: |
| cl = gfc_new_charlen (gfc_current_ns, NULL); |
| |
| cl->length = char_len; |
| break; |
| |
| /* Non-constant lengths need to be copied after the first |
| element. Also copy assumed lengths. */ |
| case MATCH_NO: |
| if (elem > 1 |
| && (current_ts.u.cl->length == NULL |
| || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) |
| { |
| cl = gfc_new_charlen (gfc_current_ns, NULL); |
| cl->length = gfc_copy_expr (current_ts.u.cl->length); |
| } |
| else |
| cl = current_ts.u.cl; |
| |
| cl_deferred = current_ts.deferred; |
| |
| 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.u.cl = cl; |
| sym->ts.u.derived = current_ts.u.derived; |
| sym->ts.is_c_interop = current_ts.is_c_interop; |
| sym->ts.is_iso_c = current_ts.is_iso_c; |
| 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); |
| } |
| } |
| |
| /* Procedure pointer as function result. */ |
| if (gfc_current_state () == COMP_FUNCTION |
| && strcmp ("ppr@", gfc_current_block ()->name) == 0 |
| && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) |
| strcpy (name, "ppr@"); |
| |
| if (gfc_current_state () == COMP_FUNCTION |
| && strcmp (name, gfc_current_block ()->name) == 0 |
| && gfc_current_block ()->result |
| && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) |
| strcpy (name, "ppr@"); |
| |
| /* 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, cl_deferred, &as, &var_locus) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (check_function_name (name) == FAILURE) |
| { |
| 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, "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 = match_pointer_init (&initializer, 0); |
| 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_state_stack->state != COMP_DERIVED) |
| { |
| 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 (ts->type == BT_INTEGER && ts->kind == 4 && gfc_option.flag_integer4_kind == 8) |
| ts->kind = 8; |
| |
| if (ts->type == BT_REAL || ts->type == BT_COMPLEX) |
| { |
| if (ts->kind == 4) |
| { |
| if (gfc_option.flag_real4_kind == 8) |
| ts->kind = 8; |
| if (gfc_option.flag_real4_kind == 10) |
| ts->kind = 10; |
| if (gfc_option.flag_real4_kind == 16) |
| ts->kind = 16; |
| } |
| |
| if (ts->kind == 8) |
| { |
| if (gfc_option.flag_real8_kind == 4) |
| ts->kind = 4; |
| if (gfc_option.flag_real8_kind == 10) |
| ts->kind = 10; |
| if (gfc_option.flag_real8_kind == 16) |
| ts->kind = 16; |
| } |
| } |
| |
| 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, bool kind_expr_only) |
| { |
| locus where, loc; |
| gfc_expr *e; |
| match m, n; |
| char c; |
| const char *msg; |
| |
| m = MATCH_NO; |
| n = MATCH_YES; |
| e = NULL; |
| |
| where = loc = gfc_current_locus; |
| |
| if (kind_expr_only) |
| goto kind_expr; |
| |
| if (gfc_match_char ('(') == MATCH_NO) |
| return MATCH_NO; |
| |
| /* Also gobbles optional text. */ |
| if (gfc_match (" kind = ") == MATCH_YES) |
| m = MATCH_ERROR; |
| |
| loc = gfc_current_locus; |
| |
| kind_expr: |
| n = gfc_match_init_expr (&e); |
| |
| if (n != MATCH_YES) |
| { |
| if (gfc_matching_function) |
| { |
| /* The function kind expression might include use associated or |
| imported parameters and try again after the specification |
| expressions..... */ |
| if (gfc_match_char (')') != MATCH_YES) |
| { |
| gfc_error ("Missing right parenthesis at %C"); |
| m = MATCH_ERROR; |
| goto no_match; |
| } |
| |
| gfc_free_expr (e); |
| gfc_undo_symbols (); |
| return MATCH_YES; |
| } |
| else |
| { |
| /* ....or else, the match is real. */ |
| 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) |
| { |
| gfc_error (msg); |
| m = MATCH_ERROR; |
| goto no_match; |
| } |
| |
| /* Before throwing away the expression, let's see if we had a |
| C interoperable kind (and store the fact). */ |
| if (e->ts.is_c_interop == 1) |
| { |
| /* Mark this as C interoperable if being declared with one |
| of the named constants from iso_c_binding. */ |
| ts->is_c_interop = e->ts.is_iso_c; |
| ts->f90_type = e->ts.f90_type; |
| } |
| |
| gfc_free_expr (e); |
| e = NULL; |
| |
| /* Ignore errors to this point, if we've gotten here. This means |
| we ignore the m=MATCH_ERROR from above. */ |
| 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)); |
| gfc_current_locus = where; |
| return MATCH_ERROR; |
| } |
| |
| /* Warn if, e.g., c_int is used for a REAL variable, but not |
| if, e.g., c_double is used for COMPLEX as the standard |
| explicitly says that the kind type parameter for complex and real |
| variable is the same, i.e. c_float == c_float_complex. */ |
| if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type |
| && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) |
| || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) |
| gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
| "is %s", gfc_basic_typename (ts->f90_type), &where, |
| gfc_basic_typename (ts->type)); |
| |
| gfc_gobble_whitespace (); |
| if ((c = gfc_next_ascii_char ()) != ')' |
| && (ts->type != BT_CHARACTER || c != ',')) |
| { |
| if (ts->type == BT_CHARACTER) |
| gfc_error ("Missing right parenthesis or comma at %C"); |
| else |
| gfc_error ("Missing right parenthesis at %C"); |
| m = MATCH_ERROR; |
| } |
| else |
| /* All tests passed. */ |
| m = MATCH_YES; |
| |
| if(m == MATCH_ERROR) |
| gfc_current_locus = where; |
| |
| if (ts->type == BT_INTEGER && ts->kind == 4 && gfc_option.flag_integer4_kind == 8) |
| ts->kind = 8; |
| |
| if (ts->type == BT_REAL || ts->type == BT_COMPLEX) |
| { |
| if (ts->kind == 4) |
| { |
| if (gfc_option.flag_real4_kind == 8) |
| ts->kind = 8; |
| if (gfc_option.flag_real4_kind == 10) |
| ts->kind = 10; |
| if (gfc_option.flag_real4_kind == 16) |
| ts->kind = 16; |
| } |
| |
| if (ts->kind == 8) |
| { |
| if (gfc_option.flag_real8_kind == 4) |
| ts->kind = 4; |
| if (gfc_option.flag_real8_kind == 10) |
| ts->kind = 10; |
| if (gfc_option.flag_real8_kind == 16) |
| ts->kind = 16; |
| } |
| } |
| |
| /* Return what we know from the test(s). */ |
| return m; |
| |
| no_match: |
| gfc_free_expr (e); |
| gfc_current_locus = where; |
| return m; |
| } |
| |
| |
| static match |
| match_char_kind (int * kind, int * is_iso_c) |
| { |
| locus where; |
| gfc_expr *e; |
| match m, n; |
| const char *msg; |
| |
| m = MATCH_NO; |
| e = NULL; |
| where = gfc_current_locus; |
| |
| n = gfc_match_init_expr (&e); |
| |
| if (n != MATCH_YES && gfc_matching_function) |
| { |
| /* The expression might include use-associated or imported |
| parameters and try again after the specification |
| expressions. */ |
| gfc_free_expr (e); |
| gfc_undo_symbols (); |
| return MATCH_YES; |
| } |
| |
| 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, kind); |
| *is_iso_c = e->ts.is_iso_c; |
| if (msg != NULL) |
| { |
| gfc_error (msg); |
| m = MATCH_ERROR; |
| goto no_match; |
| } |
| |
| gfc_free_expr (e); |
| |
| /* Ignore errors to this point, if we've gotten here. This means |
| we ignore the m=MATCH_ERROR from above. */ |
| if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) |
| { |
| gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); |
| m = MATCH_ERROR; |
| } |
| else |
| /* All tests passed. */ |
| m = MATCH_YES; |
| |
| if (m == MATCH_ERROR) |
| gfc_current_locus = where; |
| |
| /* Return what we know from the test(s). */ |
| return m; |
| |
| 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. */ |
| |
| match |
| gfc_match_char_spec (gfc_typespec *ts) |
| { |
| int kind, seen_length, is_iso_c; |
| gfc_charlen *cl; |
| gfc_expr *len; |
| match m; |
| bool deferred; |
| |
| len = NULL; |
| seen_length = 0; |
| kind = 0; |
| is_iso_c = 0; |
| deferred = false; |
| |
| /* Try the old-style specification first. */ |
| old_char_selector = 0; |
| |
| m = match_char_length (&len, &deferred, true); |
| 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 = match_char_kind (&kind, &is_iso_c); |
| |
| 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, &deferred); |
| 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, &deferred); |
| 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; |
| |
| if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
| goto done; |
| |
| goto rparen; |
| } |
| |
| /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
| m = char_len_param_value (&len, &deferred); |
| 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 = match_char_kind (&kind, &is_iso_c); |
| 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; |
| gfc_free_expr (len); |
| return m; |
| |
| done: |
| /* Deal with character functions after USE and IMPORT statements. */ |
| if (gfc_matching_function) |
| { |
| gfc_free_expr (len); |
| gfc_undo_symbols (); |
| return MATCH_YES; |
| } |
| |
| if (m != MATCH_YES) |
| { |
| gfc_free_expr (len); |
| return m; |
| } |
| |
| /* Do some final massaging of the length values. */ |
| cl = gfc_new_charlen (gfc_current_ns, NULL); |
| |
| if (seen_length == 0) |
| cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
| else |
| cl->length = len; |
| |
| ts->u.cl = cl; |
| ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
| ts->deferred = deferred; |
| |
| /* We have to know if it was a C interoperable kind so we can |
| do accurate type checking of bind(c) procs, etc. */ |
| if (kind != 0) |
| /* Mark this as C interoperable if being declared with one |
| of the named constants from iso_c_binding. */ |
| ts->is_c_interop = is_iso_c; |
| else if (len != NULL) |
| /* Here, we might have parsed something such as: character(c_char) |
| In this case, the parsing code above grabs the c_char when |
| looking for the length (line 1690, roughly). it's the last |
| testcase for parsing the kind params of a character variable. |
| However, it's not actually the length. this seems like it |
| could be an error. |
| To see if the user used a C interop kind, test the expr |
| of the so called length, and see if it's C interoperable. */ |
| ts->is_c_interop = len->ts.is_iso_c; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Matches a declaration-type-spec (F03:R502). 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. */ |
| |
| match |
| gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol *sym, *dt_sym; |
| match m; |
| char c; |
| bool seen_deferred_kind, matched_type; |
| const char *dt_name; |
| |
| /* A belt and braces check that the typespec is correctly being treated |
| as a deferred characteristic association. */ |
| seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) |
| && (gfc_current_block ()->result->ts.kind == -1) |
| && (ts->kind == -1); |
| gfc_clear_ts (ts); |
| if (seen_deferred_kind) |
| ts->kind = -1; |
| |
| /* Clear the current binding label, in case one is given. */ |
| curr_binding_label = NULL; |
| |
| if (gfc_match (" byte") == MATCH_YES) |
| { |
| if (gfc_notify_std (GFC_STD_GNU, "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; |
| } |
| |
| |
| m = gfc_match (" type ("); |
| matched_type = (m == MATCH_YES); |
| if (matched_type) |
| { |
| gfc_gobble_whitespace (); |
| if (gfc_peek_ascii_char () == '*') |
| { |
| if ((m = gfc_match ("*)")) != MATCH_YES) |
| return m; |
| if (gfc_current_state () == COMP_DERIVED) |
| { |
| gfc_error ("Assumed type at %C is not allowed for components"); |
| return MATCH_ERROR; |
| } |
| if (gfc_notify_std (GFC_STD_F2008_TS, "Assumed type " |
| "at %C") == FAILURE) |
| return MATCH_ERROR; |
| ts->type = BT_ASSUMED; |
| return MATCH_YES; |
| } |
| |
| m = gfc_match ("%n", name); |
| matched_type = (m == MATCH_YES); |
| } |
| |
| if ((matched_type && strcmp ("integer", name) == 0) |
| || (!matched_type && gfc_match (" integer") == MATCH_YES)) |
| { |
| ts->type = BT_INTEGER; |
| ts->kind = gfc_default_integer_kind; |
| goto get_kind; |
| } |
| |
| if ((matched_type && strcmp ("character", name) == 0) |
| || (!matched_type && gfc_match (" character") == MATCH_YES)) |
| { |
| if (matched_type |
| && gfc_notify_std (GFC_STD_F2008, "TYPE with " |
| "intrinsic-type-spec at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| ts->type = BT_CHARACTER; |
| if (implicit_flag == 0) |
| m = gfc_match_char_spec (ts); |
| else |
| m = MATCH_YES; |
| |
| if (matched_type && m == MATCH_YES && gfc_match_char (')') != MATCH_YES) |
| m = MATCH_ERROR; |
| |
| return m; |
| } |
| |
| if ((matched_type && strcmp ("real", name) == 0) |
| || (!matched_type && gfc_match (" real") == MATCH_YES)) |
| { |
| ts->type = BT_REAL; |
| ts->kind = gfc_default_real_kind; |
| goto get_kind; |
| } |
| |
| if ((matched_type |
| && (strcmp ("doubleprecision", name) == 0 |
| || (strcmp ("double", name) == 0 |
| && gfc_match (" precision") == MATCH_YES))) |
| || (!matched_type && gfc_match (" double precision") == MATCH_YES)) |
| { |
| if (matched_type |
| && gfc_notify_std (GFC_STD_F2008, "TYPE with " |
| "intrinsic-type-spec at %C") == FAILURE) |
| return MATCH_ERROR; |
| if (matched_type && gfc_match_char (')') != MATCH_YES) |
| return MATCH_ERROR; |
| |
| ts->type = BT_REAL; |
| ts->kind = gfc_default_double_kind; |
| return MATCH_YES; |
| } |
| |
| if ((matched_type && strcmp ("complex", name) == 0) |
| || (!matched_type && gfc_match (" complex") == MATCH_YES)) |
| { |
| ts->type = BT_COMPLEX; |
| ts->kind = gfc_default_complex_kind; |
| goto get_kind; |
| } |
| |
| if ((matched_type |
| && (strcmp ("doublecomplex", name) == 0 |
| || (strcmp ("double", name) == 0 |
| && gfc_match (" complex") == MATCH_YES))) |
| || (!matched_type && gfc_match (" double complex") == MATCH_YES)) |
| { |
| if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (matched_type |
| && gfc_notify_std (GFC_STD_F2008, "TYPE with " |
| "intrinsic-type-spec at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| if (matched_type && gfc_match_char (')') != MATCH_YES) |
| return MATCH_ERROR; |
| |
| ts->type = BT_COMPLEX; |
| ts->kind = gfc_default_double_kind; |
| return MATCH_YES; |
| } |
| |
| if ((matched_type && strcmp ("logical", name) == 0) |
| || (!matched_type && gfc_match (" logical") == MATCH_YES)) |
| { |
| ts->type = BT_LOGICAL; |
| ts->kind = gfc_default_logical_kind; |
| goto get_kind; |
| } |
| |
| if (matched_type) |
| m = gfc_match_char (')'); |
| |
| if (m == MATCH_YES) |
| ts->type = BT_DERIVED; |
| else |
| { |
| /* Match CLASS declarations. */ |
| m = gfc_match (" class ( * )"); |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| else if (m == MATCH_YES) |
| { |
| gfc_symbol *upe; |
| gfc_symtree *st; |
| ts->type = BT_CLASS; |
| gfc_find_symbol ("STAR", gfc_current_ns, 1, &upe); |
| if (upe == NULL) |
| { |
| upe = gfc_new_symbol ("STAR", gfc_current_ns); |
| st = gfc_new_symtree (&gfc_current_ns->sym_root, "STAR"); |
| st->n.sym = upe; |
| gfc_set_sym_referenced (upe); |
| upe->refs++; |
| upe->ts.type = BT_VOID; |
| upe->attr.unlimited_polymorphic = 1; |
| /* This is essential to force the construction of |
| unlimited polymorphic component class containers. */ |
| upe->attr.zero_comp = 1; |
| if (gfc_add_flavor (&upe->attr, FL_DERIVED, |
| NULL, &gfc_current_locus) == FAILURE) |
| return MATCH_ERROR; |
| } |
| else |
| { |
| st = gfc_find_symtree (gfc_current_ns->sym_root, "STAR"); |
| if (st == NULL) |
| st = gfc_new_symtree (&gfc_current_ns->sym_root, "STAR"); |
| st->n.sym = upe; |
| upe->refs++; |
| } |
| ts->u.derived = upe; |
| return m; |
| } |
| |
| m = gfc_match (" class ( %n )", name); |
| if (m != MATCH_YES) |
| return m; |
| ts->type = BT_CLASS; |
| |
| if (gfc_notify_std (GFC_STD_F2003, "CLASS statement at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| } |
| |
| /* Defer association of the derived type until the end of the |
| specification block. However, if the derived type can be |
| found, add it to the typespec. */ |
| if (gfc_matching_function) |
| { |
| ts->u.derived = NULL; |
| if (gfc_current_state () != COMP_INTERFACE |
| && !gfc_find_symbol (name, NULL, 1, &sym) && sym) |
| { |
| sym = gfc_find_dt_in_generic (sym); |
| ts->u.derived = sym; |
| } |
| return MATCH_YES; |
| } |
| |
| /* Search for the name but allow the components to be defined later. If |
| type = -1, this typespec has been seen in a function declaration but |
| the type could not be accessed at that point. The actual derived type is |
| stored in a symtree with the first letter of the name capitalized; the |
| symtree with the all lower-case name contains the associated |
| generic function. */ |
| dt_name = gfc_get_string ("%c%s", |
| (char) TOUPPER ((unsigned char) name[0]), |
| (const char*)&name[1]); |
| sym = NULL; |
| dt_sym = NULL; |
| if (ts->kind != -1) |
| { |
| gfc_get_ha_symbol (name, &sym); |
| if (sym->generic && gfc_find_symbol (dt_name, NULL, 0, &dt_sym)) |
| { |
| gfc_error ("Type name '%s' at %C is ambiguous", name); |
| return MATCH_ERROR; |
| } |
| if (sym->generic && !dt_sym) |
| dt_sym = gfc_find_dt_in_generic (sym); |
| } |
| else if (ts->kind == -1) |
| { |
| int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
| || gfc_current_ns->has_import_set; |
| gfc_find_symbol (name, NULL, iface, &sym); |
| if (sym && sym->generic && gfc_find_symbol (dt_name, NULL, 1, &dt_sym)) |
| { |
| gfc_error ("Type name '%s' at %C is ambiguous", name); |
| return MATCH_ERROR; |
| } |
| if (sym && sym->generic && !dt_sym) |
| dt_sym = gfc_find_dt_in_generic (sym); |
| |
| ts->kind = 0; |
| if (sym == NULL) |
| return MATCH_NO; |
| } |
| |
| if ((sym->attr.flavor != FL_UNKNOWN |
| && !(sym->attr.flavor == FL_PROCEDURE && sym->attr.generic)) |
| || sym->attr.subroutine) |
| { |
| gfc_error ("Type name '%s' at %C conflicts with previously declared " |
| "entity at %L, which has the same name", name, |
| &sym->declared_at); |
| return MATCH_ERROR; |
| } |
| |
| gfc_set_sym_referenced (sym); |
| if (!sym->attr.generic |
| && gfc_add_generic (&sym->attr, sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (!sym->attr.function |
| && gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (!dt_sym) |
| { |
| gfc_interface *intr, *head; |
| |
| /* Use upper case to save the actual derived-type symbol. */ |
| gfc_get_symbol (dt_name, NULL, &dt_sym); |
| dt_sym->name = gfc_get_string (sym->name); |
| head = sym->generic; |
| intr = gfc_get_interface (); |
| intr->sym = dt_sym; |
| intr->where = gfc_current_locus; |
| intr->next = head; |
| sym->generic = intr; |
| sym->attr.if_source = IFSRC_DECL; |
| } |
| |
| gfc_set_sym_referenced (dt_sym); |
| |
| if (dt_sym->attr.flavor != FL_DERIVED |
| && gfc_add_flavor (&dt_sym->attr, FL_DERIVED, sym->name, NULL) |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| ts->u.derived = dt_sym; |
| |
| return MATCH_YES; |
| |
| get_kind: |
| if (matched_type |
| && gfc_notify_std (GFC_STD_F2008, "TYPE with " |
| "intrinsic-type-spec at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| /* 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) |
| { |
| if (matched_type && gfc_match_char (')') != MATCH_YES) |
| return MATCH_ERROR; |
| |
| return MATCH_YES; |
| } |
| |
| if (gfc_current_form == FORM_FREE) |
| { |
| c = gfc_peek_ascii_char (); |
| if (!gfc_is_whitespace (c) && c != '*' && c != '(' |
| && c != ':' && c != ',') |
| { |
| if (matched_type && c == ')') |
| { |
| gfc_next_ascii_char (); |
| return MATCH_YES; |
| } |
| return MATCH_NO; |
| } |
| } |
| |
| m = gfc_match_kind_spec (ts, false); |
| if (m == MATCH_NO && ts->type != BT_CHARACTER) |
| m = gfc_match_old_kind_spec (ts); |
| |
| if (matched_type && gfc_match_char (')') != MATCH_YES) |
| return MATCH_ERROR; |
| |
| /* Defer association of the KIND expression of function results |
| until after USE and IMPORT statements. */ |
| if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) |
| || gfc_matching_function) |
| return MATCH_YES; |
| |
| 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) |
| { |
| char c, c1, c2; |
| int inner; |
| locus cur_loc; |
| |
| cur_loc = gfc_current_locus; |
| |
| gfc_gobble_whitespace (); |
| c = gfc_next_ascii_char (); |
| if (c != '(') |
| { |
| gfc_error ("Missing character range in IMPLICIT at %C"); |
| goto bad; |
| } |
| |
| inner = 1; |
| while (inner) |
| { |
| gfc_gobble_whitespace (); |
| c1 = gfc_next_ascii_char (); |
| if (!ISALPHA (c1)) |
| goto bad; |
| |
| gfc_gobble_whitespace (); |
| c = gfc_next_ascii_char (); |
| |
| switch (c) |
| { |
| case ')': |
| inner = 0; /* Fall through. */ |
| |
| case ',': |
| c2 = c1; |
| break; |
| |
| case '-': |
| gfc_gobble_whitespace (); |
| c2 = gfc_next_ascii_char (); |
| if (!ISALPHA (c2)) |
| goto bad; |
| |
| gfc_gobble_whitespace (); |
| c = gfc_next_ascii_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; |
| char c; |
| match m; |
| |
| gfc_clear_ts (&ts); |
| |
| /* 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 = gfc_match_decl_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_ascii_char (); |
| if ((c == '\n') || (c == ',')) |
| { |
| /* Check for CHARACTER with no length parameter. */ |
| if (ts.type == BT_CHARACTER && !ts.u.cl) |
| { |
| ts.kind = gfc_default_character_kind; |
| ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
| ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind, |
| NULL, 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 = gfc_match_char_spec (&ts); |
| else |
| { |
| m = gfc_match_kind_spec (&ts, false); |
| 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_ascii_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; |
| } |
| |
| |
| match |
| gfc_match_import (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| match m; |
| gfc_symbol *sym; |
| gfc_symtree *st; |
| |
| if (gfc_current_ns->proc_name == NULL |
| || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) |
| { |
| gfc_error ("IMPORT statement at %C only permitted in " |
| "an INTERFACE body"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_notify_std (GFC_STD_F2003, "IMPORT statement at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| /* All host variables should be imported. */ |
| gfc_current_ns->has_import_set = 1; |
| return MATCH_YES; |
| } |
| |
| if (gfc_match (" ::") == MATCH_YES) |
| { |
| if (gfc_match_eos () == MATCH_YES) |
| { |
| gfc_error ("Expecting list of named entities at %C"); |
| return MATCH_ERROR; |
| } |
| } |
| |
| for(;;) |
| { |
| sym = NULL; |
| m = gfc_match (" %n", name); |
| switch (m) |
| { |
| case MATCH_YES: |
| if (gfc_current_ns->parent != NULL |
| && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
| { |
| gfc_error ("Type name '%s' at %C is ambiguous", name); |
| return MATCH_ERROR; |
| } |
| else if (!sym && gfc_current_ns->proc_name->ns->parent != NULL |
| && gfc_find_symbol (name, |
| gfc_current_ns->proc_name->ns->parent, |
| 1, &sym)) |
| { |
| gfc_error ("Type name '%s' at %C is ambiguous", name); |
| return MATCH_ERROR; |
| } |
| |
| if (sym == NULL) |
| { |
| gfc_error ("Cannot IMPORT '%s' from host scoping unit " |
| "at %C - does not exist.", name); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_find_symtree (gfc_current_ns->sym_root, name)) |
| { |
| gfc_warning ("'%s' is already IMPORTed from host scoping unit " |
| "at %C.", name); |
| goto next_item; |
| } |
| |
| st = gfc_new_symtree (&gfc_current_ns->sym_root, name); |
| st->n.sym = sym; |
| sym->refs++; |
| sym->attr.imported = 1; |
| |
| if (sym->attr.generic && (sym = gfc_find_dt_in_generic (sym))) |
| { |
| /* The actual derived type is stored in a symtree with the first |
| letter of the name capitalized; the symtree with the all |
| lower-case name contains the associated generic function. */ |
| st = gfc_new_symtree (&gfc_current_ns->sym_root, |
| gfc_get_string ("%c%s", |
| (char) TOUPPER ((unsigned char) name[0]), |
| &name[1])); |
| st->n.sym = sym; |
| sym->refs++; |
| sym->attr.imported = 1; |
| } |
| |
| goto next_item; |
| |
| case MATCH_NO: |
| break; |
| |
| case MATCH_ERROR: |
| return MATCH_ERROR; |
| } |
| |
| 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 IMPORT statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* A minimal implementation of gfc_match without whitespace, escape |
| characters or variable arguments. Returns true if the next |
| characters match the TARGET template exactly. */ |
| |
| static bool |
| match_string_p (const char *target) |
| { |
| const char *p; |
| |
| for (p = target; *p; p++) |
| if ((char) gfc_next_ascii_char () != *p) |
| return false; |
| return true; |
| } |
| |
| /* 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. */ |
| 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_PROTECTED, DECL_PRIVATE, |
| DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, |
| DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_CONTIGUOUS, |
| DECL_NONE, GFC_DECL_END /* Sentinel */ |
| }; |
| |
| /* GFC_DECL_END is the sentinel, index starts at 0. */ |
| #define NUM_DECL GFC_DECL_END |
| |
| locus start, seen_at[NUM_DECL]; |
| int seen[NUM_DECL]; |
| unsigned int d; |
| const char *attr; |
| match m; |
| gfc_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 (;;) |
| { |
| char ch; |
| |
| d = DECL_NONE; |
| gfc_gobble_whitespace (); |
| |
| ch = gfc_next_ascii_char (); |
| if (ch == ':') |
| { |
| /* This is the successful exit condition for the loop. */ |
| if (gfc_next_ascii_char () == ':') |
| break; |
| } |
| else if (ch == ',') |
| { |
| gfc_gobble_whitespace (); |
| switch (gfc_peek_ascii_char ()) |
| { |
| case 'a': |
| gfc_next_ascii_char (); |
| switch (gfc_next_ascii_char ()) |
| { |
| case 'l': |
| if (match_string_p ("locatable")) |
| { |
| /* Matched "allocatable". */ |
| d = DECL_ALLOCATABLE; |
| } |
| break; |
| |
| case 's': |
| if (match_string_p ("ynchronous")) |
| { |
| /* Matched "asynchronous". */ |
| d = DECL_ASYNCHRONOUS; |
| } |
| break; |
| } |
| break; |
| |
| case 'b': |
| /* Try and match the bind(c). */ |
| m = gfc_match_bind_c (NULL, true); |
| if (m == MATCH_YES) |
| d = DECL_IS_BIND_C; |
| else if (m == MATCH_ERROR) |
| goto cleanup; |
| break; |
| |
| case 'c': |
| gfc_next_ascii_char (); |
| if ('o' != gfc_next_ascii_char ()) |
| break; |
| switch (gfc_next_ascii_char ()) |
| { |
| case 'd': |
| if (match_string_p ("imension")) |
| { |
| d = DECL_CODIMENSION; |
| break; |
| } |
| case 'n': |
| if (match_string_p ("tiguous")) |
| { |
| d = DECL_CONTIGUOUS; |
| break; |
| } |
| } |
| break; |
| |
| case 'd': |
| if (match_string_p ("dimension")) |
| d = DECL_DIMENSION; |
| break; |
| |
| case 'e': |
| if (match_string_p ("external")) |
| d = DECL_EXTERNAL; |
| break; |
| |
| case 'i': |
| if (match_string_p ("int")) |
| { |
| ch = gfc_next_ascii_char (); |
| if (ch == 'e') |
| { |
| if (match_string_p ("nt")) |
| { |
| /* Matched "intent". */ |
| /* TODO: Call match_intent_spec from here. */ |
| if (gfc_match (" ( in out )") == MATCH_YES) |
| d = DECL_INOUT; |
| else if (gfc_match (" ( in )") == MATCH_YES) |
| d = DECL_IN; |
| else if (gfc_match (" ( out )") == MATCH_YES) |
| d = DECL_OUT; |
| } |
| } |
| else if (ch == 'r') |
| { |
| if (match_string_p ("insic")) |
| { |
| /* Matched "intrinsic". */ |
| d = DECL_INTRINSIC; |
| } |
| } |
| } |
| break; |
| |
| case 'o': |
| if (match_string_p ("optional")) |
| d = DECL_OPTIONAL; |
| break; |
| |
| case 'p': |
| gfc_next_ascii_char (); |
| switch (gfc_next_ascii_char ()) |
| { |
| case 'a': |
| if (match_string_p ("rameter")) |
| { |
| /* Matched "parameter". */ |
| d = DECL_PARAMETER; |
| } |
| break; |
| |
| case 'o': |
| if (match_string_p ("inter")) |
| { |
| /* Matched "pointer". */ |
| d = DECL_POINTER; |
| } |
| break; |
| |
| case 'r': |
| ch = gfc_next_ascii_char (); |
| if (ch == 'i') |
| { |
| if (match_string_p ("vate")) |
| { |
| /* Matched "private". */ |
| d = DECL_PRIVATE; |
| } |
| } |
| else if (ch == 'o') |
| { |
| if (match_string_p ("tected")) |
| { |
| /* Matched "protected". */ |
| d = DECL_PROTECTED; |
| } |
| } |
| break; |
| |
| case 'u': |
| if (match_string_p ("blic")) |
| { |
| /* Matched "public". */ |
| d = DECL_PUBLIC; |
| } |
| break; |
| } |
| break; |
| |
| case 's': |
| if (match_string_p ("save")) |
| d = DECL_SAVE; |
| break; |
| |
| case 't': |
| if (match_string_p ("target")) |
| d = DECL_TARGET; |
| break; |
| |
| case 'v': |
| gfc_next_ascii_char (); |
| ch = gfc_next_ascii_char (); |
| if (ch == 'a') |
| { |
| if (match_string_p ("lue")) |
| { |
| /* Matched "value". */ |
| d = DECL_VALUE; |
| } |
| } |
| else if (ch == 'o') |
| { |
| if (match_string_p ("latile")) |
| { |
| /* Matched "volatile". */ |
| d = DECL_VOLATILE; |
| } |
| } |
| break; |
| } |
| } |
| |
| /* No double colon and no recognizable decl_type, so assume that |
| we've been looking at something else the whole time. */ |
| if (d == DECL_NONE) |
| { |
| m = MATCH_NO; |
| goto cleanup; |
| } |
| |
| /* Check to make sure any parens are paired up correctly. */ |
| if (gfc_match_parens () == MATCH_ERROR) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| seen[d]++; |
| seen_at[d] = gfc_current_locus; |
| |
| if (d == DECL_DIMENSION || d == DECL_CODIMENSION) |
| { |
| gfc_array_spec *as = NULL; |
| |
| m = gfc_match_array_spec (&as, d == DECL_DIMENSION, |
| d == DECL_CODIMENSION); |
| |
| if (current_as == NULL) |
| current_as = as; |
| else if (m == MATCH_YES) |
| { |
| if (merge_array_spec (as, current_as, false) == FAILURE) |
| m = MATCH_ERROR; |
| free (as); |
| } |
| |
| if (m == MATCH_NO) |
| { |
| if (d == DECL_CODIMENSION) |
| gfc_error ("Missing codimension specification at %C"); |
| else |
| gfc_error ("Missing dimension specification at %C"); |
| m = MATCH_ERROR; |
| } |
| |
| if (m == MATCH_ERROR) |
| 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_ASYNCHRONOUS: |
| attr = "ASYNCHRONOUS"; |
| break; |
| case DECL_CODIMENSION: |
| attr = "CODIMENSION"; |
| break; |
| case DECL_CONTIGUOUS: |
| attr = "CONTIGUOUS"; |
| 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_PROTECTED: |
| attr = "PROTECTED"; |
| 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; |
| case DECL_IS_BIND_C: |
| attr = "IS_BIND_C"; |
| break; |
| case DECL_VALUE: |
| attr = "VALUE"; |
| break; |
| case DECL_VOLATILE: |
| attr = "VOLATILE"; |
| 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_CODIMENSION |
| && d != DECL_POINTER && d != DECL_PRIVATE |
| && d != DECL_PUBLIC && d != DECL_CONTIGUOUS && d != DECL_NONE) |
| { |
| if (d == DECL_ALLOCATABLE) |
| { |
| if (gfc_notify_std (GFC_STD_F2003, "ALLOCATABLE " |
| "attribute at %C 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"; |
| if (gfc_current_state () == COMP_DERIVED |
| && gfc_state_stack->previous |
| && gfc_state_stack->previous->state == COMP_MODULE) |
| { |
| if (gfc_notify_std (GFC_STD_F2003, "Attribute %s " |
| "at %L in a TYPE definition", attr, |
| &seen_at[d]) |
| == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| else |
| { |
| gfc_error ("%s attribute at %L is not allowed outside of the " |
| "specification part 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_ASYNCHRONOUS: |
| if (gfc_notify_std (GFC_STD_F2003, |
| "ASYNCHRONOUS attribute at %C") |
| == FAILURE) |
| t = FAILURE; |
| else |
| t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]); |
| break; |
| |
| case DECL_CODIMENSION: |
| t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]); |
| break; |
| |
| case DECL_CONTIGUOUS: |
| if (gfc_notify_std (GFC_STD_F2008, |
| "CONTIGUOUS attribute at %C") |
| == FAILURE) |
| t = FAILURE; |
| else |
| t = gfc_add_contiguous (¤t_attr, NULL, &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_PROTECTED: |
| if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) |
| { |
| gfc_error ("PROTECTED at %C only allowed in specification " |
| "part of a module"); |
| t = FAILURE; |
| break; |
| } |
| |
| if (gfc_notify_std (GFC_STD_F2003, "PROTECTED " |
| "attribute at %C") |
| == FAILURE) |
| t = FAILURE; |
| else |
| t = gfc_add_protected (¤t_attr, NULL, &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, SAVE_EXPLICIT, NULL, &seen_at[d]); |
| break; |
| |
| case DECL_TARGET: |
| t = gfc_add_target (¤t_attr, &seen_at[d]); |
| break; |
| |
| case DECL_IS_BIND_C: |
| t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); |
| break; |
| |
| case DECL_VALUE: |
| if (gfc_notify_std (GFC_STD_F2003, "VALUE attribute " |
| "at %C") |
| == FAILURE) |
| t = FAILURE; |
| else |
| t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); |
| break; |
| |
| case DECL_VOLATILE: |
| if (gfc_notify_std (GFC_STD_F2003, |
| "VOLATILE attribute at %C") |
| == FAILURE) |
| t = FAILURE; |
| else |
| t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); |
| break; |
| |
| default: |
| gfc_internal_error ("match_attr_spec(): Bad attribute"); |
| } |
| |
| if (t == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| |
| /* Since Fortran 2008 module variables implicitly have the SAVE attribute. */ |
| if (gfc_current_state () == COMP_MODULE && !current_attr.save |
| && (gfc_option.allow_std & GFC_STD_F2008) != 0) |
| current_attr.save = SAVE_IMPLICIT; |
| |
| colon_seen = 1; |
| return MATCH_YES; |
| |
| cleanup: |
| gfc_current_locus = start; |
| gfc_free_array_spec (current_as); |
| current_as = NULL; |
| return m; |
| } |
| |
| |
| /* Set the binding label, dest_label, either with the binding label |
| stored in the given gfc_typespec, ts, or if none was provided, it |
| will be the symbol name in all lower case, as required by the draft |
| (J3/04-007, section 15.4.1). If a binding label was given and |
| there is more than one argument (num_idents), it is an error. */ |
| |
| static gfc_try |
| set_binding_label (const char **dest_label, const char *sym_name, |
| int num_idents) |
| { |
| if (num_idents > 1 && has_name_equals) |
| { |
| gfc_error ("Multiple identifiers provided with " |
| "single NAME= specifier at %C"); |
| return FAILURE; |
| } |
| |
| if (curr_binding_label) |
| /* Binding label given; store in temp holder till have sym. */ |
| *dest_label = curr_binding_label; |
| else |
| { |
| /* No binding label given, and the NAME= specifier did not exist, |
| which means there was no NAME="". */ |
| if (sym_name != NULL && has_name_equals == 0) |
| *dest_label = IDENTIFIER_POINTER (get_identifier (sym_name)); |
| } |
| |
| return SUCCESS; |
| } |
| |
| |
| /* Set the status of the given common block as being BIND(C) or not, |
| depending on the given parameter, is_bind_c. */ |
| |
| void |
| set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) |
| { |
| com_block->is_bind_c = is_bind_c; |
| return; |
| } |
| |
| |
| /* Verify that the given gfc_typespec is for a C interoperable type. */ |
| |
| gfc_try |
| gfc_verify_c_interop (gfc_typespec *ts) |
| { |
| if (ts->type == BT_DERIVED && ts->u.derived != NULL) |
| return (ts->u.derived->ts.is_c_interop || ts->u.derived->attr.is_bind_c) |
| ? SUCCESS : FAILURE; |
| else if (ts->type == BT_CLASS) |
| return FAILURE; |
| else if (ts->is_c_interop != 1 && ts->type != BT_ASSUMED) |
| return FAILURE; |
| |
| return SUCCESS; |
| } |
| |
| |
| /* Verify that the variables of a given common block, which has been |
| defined with the attribute specifier bind(c), to be of a C |
| interoperable type. Errors will be reported here, if |
| encountered. */ |
| |
| gfc_try |
| verify_com_block_vars_c_interop (gfc_common_head *com_block) |
| { |
| gfc_symbol *curr_sym = NULL; |
| gfc_try retval = SUCCESS; |
| |
| curr_sym = com_block->head; |
| |
| /* Make sure we have at least one symbol. */ |
| if (curr_sym == NULL) |
| return retval; |
| |
| /* Here we know we have a symbol, so we'll execute this loop |
| at least once. */ |
| do |
| { |
| /* The second to last param, 1, says this is in a common block. */ |
| retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); |
| curr_sym = curr_sym->common_next; |
| } while (curr_sym != NULL); |
| |
| return retval; |
| } |
| |
| |
| /* Verify that a given BIND(C) symbol is C interoperable. If it is not, |
| an appropriate error message is reported. */ |
| |
| gfc_try |
| verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
| int is_in_common, gfc_common_head *com_block) |
| { |
| bool bind_c_function = false; |
| gfc_try retval = SUCCESS; |
| |
| if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
| bind_c_function = true; |
| |
| if (tmp_sym->attr.function && tmp_sym->result != NULL) |
| { |
| tmp_sym = tmp_sym->result; |
| /* Make sure it wasn't an implicitly typed result. */ |
| if (tmp_sym->attr.implicit_type && gfc_option.warn_c_binding_type) |
| { |
| gfc_warning ("Implicitly declared BIND(C) function '%s' at " |
| "%L may not be C interoperable", tmp_sym->name, |
| &tmp_sym->declared_at); |
| tmp_sym->ts.f90_type = tmp_sym->ts.type; |
| /* Mark it as C interoperable to prevent duplicate warnings. */ |
| tmp_sym->ts.is_c_interop = 1; |
| tmp_sym->attr.is_c_interop = 1; |
| } |
| } |
| |
| /* Here, we know we have the bind(c) attribute, so if we have |
| enough type info, then verify that it's a C interop kind. |
| The info could be in the symbol already, or possibly still in |
| the given ts (current_ts), so look in both. */ |
| if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) |
| { |
| if (gfc_verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
| { |
| /* See if we're dealing with a sym in a common block or not. */ |
| if (is_in_common == 1 && gfc_option.warn_c_binding_type) |
| { |
| gfc_warning ("Variable '%s' in common block '%s' at %L " |
| "may not be a C interoperable " |
| "kind though common block '%s' is BIND(C)", |
| tmp_sym->name, com_block->name, |
| &(tmp_sym->declared_at), com_block->name); |
| } |
| else |
| { |
| if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) |
| gfc_error ("Type declaration '%s' at %L is not C " |
| "interoperable but it is BIND(C)", |
| tmp_sym->name, &(tmp_sym->declared_at)); |
| else if (gfc_option.warn_c_binding_type) |
| gfc_warning ("Variable '%s' at %L " |
| "may not be a C interoperable " |
| "kind but it is bind(c)", |
| tmp_sym->name, &(tmp_sym->declared_at)); |
| } |
| } |
| |
| /* Variables declared w/in a common block can't be bind(c) |
| since there's no way for C to see these variables, so there's |
| semantically no reason for the attribute. */ |
| if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) |
| { |
| gfc_error ("Variable '%s' in common block '%s' at " |
| "%L cannot be declared with BIND(C) " |
| "since it is not a global", |
| tmp_sym->name, com_block->name, |
| &(tmp_sym->declared_at)); |
| retval = FAILURE; |
| } |
| |
| /* Scalar variables that are bind(c) can not have the pointer |
| or allocatable attributes. */ |
| if (tmp_sym->attr.is_bind_c == 1) |
| { |
| if (tmp_sym->attr.pointer == 1) |
| { |
| gfc_error ("Variable '%s' at %L cannot have both the " |
| "POINTER and BIND(C) attributes", |
| tmp_sym->name, &(tmp_sym->declared_at)); |
| retval = FAILURE; |
| } |
| |
| if (tmp_sym->attr.allocatable == 1) |
| { |
| gfc_error ("Variable '%s' at %L cannot have both the " |
| "ALLOCATABLE and BIND(C) attributes", |
| tmp_sym->name, &(tmp_sym->declared_at)); |
| retval = FAILURE; |
| } |
| |
| } |
| |
| /* If it is a BIND(C) function, make sure the return value is a |
| scalar value. The previous tests in this function made sure |
| the type is interoperable. */ |
| if (bind_c_function && tmp_sym->as != NULL) |
| gfc_error ("Return type of BIND(C) function '%s' at %L cannot " |
| "be an array", tmp_sym->name, &(tmp_sym->declared_at)); |
| |
| /* BIND(C) functions can not return a character string. */ |
| if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) |
| if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL |
| || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT |
| || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0) |
| gfc_error ("Return type of BIND(C) function '%s' at %L cannot " |
| "be a character string", tmp_sym->name, |
| &(tmp_sym->declared_at)); |
| } |
| |
| /* See if the symbol has been marked as private. If it has, make sure |
| there is no binding label and warn the user if there is one. */ |
| if (tmp_sym->attr.access == ACCESS_PRIVATE |
| && tmp_sym->binding_label) |
| /* Use gfc_warning_now because we won't say that the symbol fails |
| just because of this. */ |
| gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " |
| "given the binding label '%s'", tmp_sym->name, |
| &(tmp_sym->declared_at), tmp_sym->binding_label); |
| |
| return retval; |
| } |
| |
| |
| /* Set the appropriate fields for a symbol that's been declared as |
| BIND(C) (the is_bind_c flag and the binding label), and verify that |
| the type is C interoperable. Errors are reported by the functions |
| used to set/test these fields. */ |
| |
| gfc_try |
| set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
| { |
| gfc_try retval = SUCCESS; |
| |
| /* TODO: Do we need to make sure the vars aren't marked private? */ |
| |
| /* Set the is_bind_c bit in symbol_attribute. */ |
| gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); |
| |
| if (set_binding_label (&tmp_sym->binding_label, tmp_sym->name, |
| num_idents) != SUCCESS) |
| return FAILURE; |
| |
| return retval; |
| } |
| |
| |
| /* Set the fields marking the given common block as BIND(C), including |
| a binding label, and report any errors encountered. */ |
| |
| gfc_try |
| set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
| { |
| gfc_try retval = SUCCESS; |
| |
| /* destLabel, common name, typespec (which may have binding label). */ |
| if (set_binding_label (&com_block->binding_label, com_block->name, |
| num_idents) |
| != SUCCESS) |
| return FAILURE; |
| |
| /* Set the given common block (com_block) to being bind(c) (1). */ |
| set_com_block_bind_c (com_block, 1); |
| |
| return retval; |
| } |
| |
| |
| /* Retrieve the list of one or more identifiers that the given bind(c) |
| attribute applies to. */ |
| |
| gfc_try |
| get_bind_c_idents (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| int num_idents = 0; |
| gfc_symbol *tmp_sym = NULL; |
| match found_id; |
| gfc_common_head *com_block = NULL; |
| |
| if (gfc_match_name (name) == MATCH_YES) |
| { |
| found_id = MATCH_YES; |
| gfc_get_ha_symbol (name, &tmp_sym); |
| } |
| else if (match_common_name (name) == MATCH_YES) |
| { |
| found_id = MATCH_YES; |
| com_block = gfc_get_common (name, 0); |
| } |
| else |
| { |
| gfc_error ("Need either entity or common block name for " |
| "attribute specification statement at %C"); |
| return FAILURE; |
| } |
| |
| /* Save the current identifier and look for more. */ |
| do |
| { |
| /* Increment the number of identifiers found for this spec stmt. */ |
| num_idents++; |
| |
| /* Make sure we have a sym or com block, and verify that it can |
| be bind(c). Set the appropriate field(s) and look for more |
| identifiers. */ |
| if (tmp_sym != NULL || com_block != NULL) |
| { |
| if (tmp_sym != NULL) |
| { |
| if (set_verify_bind_c_sym (tmp_sym, num_idents) |
| != SUCCESS) |
| return FAILURE; |
| } |
| else |
| { |
| if (set_verify_bind_c_com_block(com_block, num_idents) |
| != SUCCESS) |
| return FAILURE; |
| } |
| |
| /* Look to see if we have another identifier. */ |
| tmp_sym = NULL; |
| if (gfc_match_eos () == MATCH_YES) |
| found_id = MATCH_NO; |
| else if (gfc_match_char (',') != MATCH_YES) |
| found_id = MATCH_NO; |
| else if (gfc_match_name (name) == MATCH_YES) |
| { |
| found_id = MATCH_YES; |
| gfc_get_ha_symbol (name, &tmp_sym); |
| } |
| else if (match_common_name (name) == MATCH_YES) |
| { |
| found_id = MATCH_YES; |
| com_block = gfc_get_common (name, 0); |
| } |
| else |
| { |
| gfc_error ("Missing entity or common block name for " |
| "attribute specification statement at %C"); |
| return FAILURE; |
| } |
| } |
| else |
| { |
| gfc_internal_error ("Missing symbol"); |
| } |
| } while (found_id == MATCH_YES); |
| |
| /* if we get here we were successful */ |
| return SUCCESS; |
| } |
| |
| |
| /* Try and match a BIND(C) attribute specification statement. */ |
| |
| match |
| gfc_match_bind_c_stmt (void) |
| { |
| match found_match = MATCH_NO; |
| gfc_typespec *ts; |
| |
| ts = ¤t_ts; |
| |
| /* This may not be necessary. */ |
| gfc_clear_ts (ts); |
| /* Clear the temporary binding label holder. */ |
| curr_binding_label = NULL; |
| |
| /* Look for the bind(c). */ |
| found_match = gfc_match_bind_c (NULL, true); |
| |
| if (found_match == MATCH_YES) |
| { |
| /* Look for the :: now, but it is not required. */ |
| gfc_match (" :: "); |
| |
| /* Get the identifier(s) that needs to be updated. This may need to |
| change to hand the flag(s) for the attr specified so all identifiers |
| found can have all appropriate parts updated (assuming that the same |
| spec stmt can have multiple attrs, such as both bind(c) and |
| allocatable...). */ |
| if (get_bind_c_idents () != SUCCESS) |
| /* Error message should have printed already. */ |
| return MATCH_ERROR; |
| } |
| |
| return found_match; |
| } |
| |
| |
| /* Match a data declaration statement. */ |
| |
| match |
| gfc_match_data_decl (void) |
| { |
| gfc_symbol *sym; |
| match m; |
| int elem; |
| |
| num_idents_on_line = 0; |
| |
| m = gfc_match_decl_type_spec (¤t_ts, 0); |
| if (m != MATCH_YES) |
| return m; |
| |
| if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
| && gfc_current_state () != COMP_DERIVED) |
| { |
| sym = gfc_use_derived (current_ts.u.derived); |
| |
| if (sym == NULL) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| current_ts.u.derived = sym; |
| } |
| |
| m = match_attr_spec (); |
| if (m == MATCH_ERROR) |
| { |
| m = MATCH_NO; |
| goto cleanup; |
| } |
| |
| if (current_ts.type == BT_CLASS |
| && current_ts.u.derived->attr.unlimited_polymorphic) |
| goto ok; |
| |
| if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
| && current_ts.u.derived->components == NULL |
| && !current_ts.u.derived->attr.zero_comp) |
| { |
| |
| if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) |
| goto ok; |
| |
| gfc_find_symbol (current_ts.u.derived->name, |
| current_ts.u.derived->ns, 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.u.derived->components != NULL |
| || current_ts.u.derived->attr.zero_comp)) |
| 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 (;;) |
| { |
| num_idents_on_line++; |
| 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; |
| |
| gfc_free_data_all (gfc_current_ns); |
| |
| 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). */ |
| |
| match |
| gfc_match_prefix (gfc_typespec *ts) |
| { |
| bool seen_type; |
| bool seen_impure; |
| bool found_prefix; |
| |
| gfc_clear_attr (¤t_attr); |
| seen_type = false; |
| seen_impure = false; |
| |
| gcc_assert (!gfc_matching_prefix); |
| gfc_matching_prefix = true; |
| |
| do |
| { |
| found_prefix = false; |
| |
| if (!seen_type && ts != NULL |
| && gfc_match_decl_type_spec (ts, 0) == MATCH_YES |
| && gfc_match_space () == MATCH_YES) |
| { |
| |
| seen_type = true; |
| found_prefix = true; |
| } |
| |
| if (gfc_match ("elemental% ") == MATCH_YES) |
| { |
| if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) |
| goto error; |
| |
| found_prefix = true; |
| } |
| |
| if (gfc_match ("pure% ") == MATCH_YES) |
| { |
| if (gfc_add_pure (¤t_attr, NULL) == FAILURE) |
| goto error; |
| |
| found_prefix = true; |
| } |
| |
| if (gfc_match ("recursive% ") == MATCH_YES) |
| { |
| if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) |
| goto error; |
| |
| found_prefix = true; |
| } |
| |
| /* IMPURE is a somewhat special case, as it needs not set an actual |
| attribute but rather only prevents ELEMENTAL routines from being |
| automatically PURE. */ |
| if (gfc_match ("impure% ") == MATCH_YES) |
| { |
| if (gfc_notify_std (GFC_STD_F2008, |
| "IMPURE procedure at %C") |
| == FAILURE) |
| goto error; |
| |
| seen_impure = true; |
| found_prefix = true; |
| } |
| } |
| while (found_prefix); |
| |
| /* IMPURE and PURE must not both appear, of course. */ |
| if (seen_impure && current_attr.pure) |
| { |
| gfc_error ("PURE and IMPURE must not appear both at %C"); |
| goto error; |
| } |
| |
| /* If IMPURE it not seen but the procedure is ELEMENTAL, mark it as PURE. */ |
| if (!seen_impure && current_attr.elemental && !current_attr.pure) |
| { |
| if (gfc_add_pure (¤t_attr, NULL) == FAILURE) |
| goto error; |
| } |
| |
| /* At this point, the next item is not a prefix. */ |
| gcc_assert (gfc_matching_prefix); |
| gfc_matching_prefix = false; |
| return MATCH_YES; |
| |
| error: |
| gcc_assert (gfc_matching_prefix); |
| gfc_matching_prefix = false; |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
| |
| static gfc_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; |
| |
| /* Get the right paren, and that's it because there could be the |
| bind(c) attribute after the result clause. */ |
| if (gfc_match_char(')') != MATCH_YES) |
| { |
| /* TODO: should report the missing right paren here. */ |
| 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_result (&r->attr, r->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| *result = r; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a function suffix, which could be a combination of a result |
| clause and BIND(C), either one, or neither. The draft does not |
| require them to come in a specific order. */ |
| |
| match |
| gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) |
| { |
| match is_bind_c; /* Found bind(c). */ |
| match is_result; /* Found result clause. */ |
| match found_match; /* Status of whether we've found a good match. */ |
| char peek_char; /* Character we're going to peek at. */ |
| bool allow_binding_name; |
| |
| /* Initialize to having found nothing. */ |
| found_match = MATCH_NO; |
| is_bind_c = MATCH_NO; |
| is_result = MATCH_NO; |
| |
| /* Get the next char to narrow between result and bind(c). */ |
| gfc_gobble_whitespace (); |
| peek_char = gfc_peek_ascii_char (); |
| |
| /* C binding names are not allowed for internal procedures. */ |
| if (gfc_current_state () == COMP_CONTAINS |
| && sym->ns->proc_name->attr.flavor != FL_MODULE) |
| allow_binding_name = false; |
| else |
| allow_binding_name = true; |
| |
| switch (peek_char) |
| { |
| case 'r': |
| /* Look for result clause. */ |
| is_result = match_result (sym, result); |
| if (is_result == MATCH_YES) |
| { |
| /* Now see if there is a bind(c) after it. */ |
| is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
| /* We've found the result clause and possibly bind(c). */ |
| found_match = MATCH_YES; |
| } |
| else |
| /* This should only be MATCH_ERROR. */ |
| found_match = is_result; |
| break; |
| case 'b': |
| /* Look for bind(c) first. */ |
| is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
| if (is_bind_c == MATCH_YES) |
| { |
| /* Now see if a result clause followed it. */ |
| is_result = match_result (sym, result); |
| found_match = MATCH_YES; |
| } |
| else |
| { |
| /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ |
| found_match = MATCH_ERROR; |
| } |
| break; |
| default: |
| gfc_error ("Unexpected junk after function declaration at %C"); |
| found_match = MATCH_ERROR; |
| break; |
| } |
| |
| if (is_bind_c == MATCH_YES) |
| { |
| /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
| if (gfc_current_state () == COMP_CONTAINS |
| && sym->ns->proc_name->attr.flavor != FL_MODULE |
| && gfc_notify_std (GFC_STD_F2008, "BIND(C) attribute " |
| "at %L may not be specified for an internal " |
| "procedure", &gfc_current_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
| == FAILURE) |
| return MATCH_ERROR; |
| } |
| |
| return found_match; |
| } |
| |
| |
| /* Procedure pointer return value without RESULT statement: |
| Add "hidden" result variable named "ppr@". */ |
| |
| static gfc_try |
| add_hidden_procptr_result (gfc_symbol *sym) |
| { |
| bool case1,case2; |
| |
| if (gfc_notification_std (GFC_STD_F2003) == ERROR) |
| return FAILURE; |
| |
| /* First usage case: PROCEDURE and EXTERNAL statements. */ |
| case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () |
| && strcmp (gfc_current_block ()->name, sym->name) == 0 |
| && sym->attr.external; |
| /* Second usage case: INTERFACE statements. */ |
| case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous |
| && gfc_state_stack->previous->state == COMP_FUNCTION |
| && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; |
| |
| if (case1 || case2) |
| { |
| gfc_symtree *stree; |
| if (case1) |
| gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
| else if (case2) |
| { |
| gfc_symtree *st2; |
| gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
| st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
| st2->n.sym = stree->n.sym; |
| } |
| sym->result = stree->n.sym; |
| |
| sym->result->attr.proc_pointer = sym->attr.proc_pointer; |
| sym->result->attr.pointer = sym->attr.pointer; |
| sym->result->attr.external = sym->attr.external; |
| sym->result->attr.referenced = sym->attr.referenced; |
| sym->result->ts = sym->ts; |
| sym->attr.proc_pointer = 0; |
| sym->attr.pointer = 0; |
| sym->attr.external = 0; |
| if (sym->result->attr.external && sym->result->attr.pointer) |
| { |
| sym->result->attr.pointer = 0; |
| sym->result->attr.proc_pointer = 1; |
| } |
| |
| return gfc_add_result (&sym->result->attr, sym->result->name, NULL); |
| } |
| /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ |
| else if (sym->attr.function && !sym->attr.external && sym->attr.pointer |
| && sym->result && sym->result != sym && sym->result->attr.external |
| && sym == gfc_current_ns->proc_name |
| && sym == sym->result->ns->proc_name |
| && strcmp ("ppr@", sym->result->name) == 0) |
| { |
| sym->result->attr.proc_pointer = 1; |
| sym->attr.pointer = 0; |
| return SUCCESS; |
| } |
| else |
| return FAILURE; |
| } |
| |
| |
| /* Match the interface for a PROCEDURE declaration, |
| including brackets (R1212). */ |
| |
| static match |
| match_procedure_interface (gfc_symbol **proc_if) |
| { |
| match m; |
| gfc_symtree *st; |
| locus old_loc, entry_loc; |
| gfc_namespace *old_ns = gfc_current_ns; |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| |
| old_loc = entry_loc = gfc_current_locus; |
| gfc_clear_ts (¤t_ts); |
| |
| if (gfc_match (" (") != MATCH_YES) |
| { |
| gfc_current_locus = entry_loc; |
| return MATCH_NO; |
| } |
| |
| /* Get the type spec. for the procedure interface. */ |
| old_loc = gfc_current_locus; |
| m = gfc_match_decl_type_spec (¤t_ts, 0); |
| gfc_gobble_whitespace (); |
| if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
| goto got_ts; |
| |
| if (m == MATCH_ERROR) |
| return m; |
| |
| /* Procedure interface is itself a procedure. */ |
| gfc_current_locus = old_loc; |
| m = gfc_match_name (name); |
| |
| /* First look to see if it is already accessible in the current |
| namespace because it is use associated or contained. */ |
| st = NULL; |
| if (gfc_find_sym_tree (name, NULL, 0, &st)) |
| return MATCH_ERROR; |
| |
| /* If it is still not found, then try the parent namespace, if it |
| exists and create the symbol there if it is still not found. */ |
| if (gfc_current_ns->parent) |
| gfc_current_ns = gfc_current_ns->parent; |
| if (st == NULL && gfc_get_ha_sym_tree (name, &st)) |
| return MATCH_ERROR; |
| |
| gfc_current_ns = old_ns; |
| *proc_if = st->n.sym; |
| |
| if (*proc_if) |
| { |
| (*proc_if)->refs++; |
| /* Resolve interface if possible. That way, attr.procedure is only set |
| if it is declared by a later procedure-declaration-stmt, which is |
| invalid per F08:C1216 (cf. resolve_procedure_interface). */ |
| while ((*proc_if)->ts.interface) |
| *proc_if = (*proc_if)->ts.interface; |
| |
| if ((*proc_if)->attr.flavor == FL_UNKNOWN |
| && (*proc_if)->ts.type == BT_UNKNOWN |
| && gfc_add_flavor (&(*proc_if)->attr, FL_PROCEDURE, |
| (*proc_if)->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| } |
| |
| got_ts: |
| if (gfc_match (" )") != MATCH_YES) |
| { |
| gfc_current_locus = entry_loc; |
| return MATCH_NO; |
| } |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a PROCEDURE declaration (R1211). */ |
| |
| static match |
| match_procedure_decl (void) |
| { |
| match m; |
| gfc_symbol *sym, *proc_if = NULL; |
| int num; |
| gfc_expr *initializer = NULL; |
| |
| /* Parse interface (with brackets). */ |
| m = match_procedure_interface (&proc_if); |
| if (m != MATCH_YES) |
| return m; |
| |
| /* Parse attributes (with colons). */ |
| m = match_attr_spec(); |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| if (proc_if && proc_if->attr.is_bind_c && !current_attr.is_bind_c) |
| { |
| current_attr.is_bind_c = 1; |
| has_name_equals = 0; |
| curr_binding_label = NULL; |
| } |
| |
| /* Get procedure symbols. */ |
| for(num=1;;num++) |
| { |
| m = gfc_match_symbol (&sym, 0); |
| if (m == MATCH_NO) |
| goto syntax; |
| else if (m == MATCH_ERROR) |
| return m; |
| |
| /* Add current_attr to the symbol attributes. */ |
| if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (sym->attr.is_bind_c) |
| { |
| /* Check for C1218. */ |
| if (!proc_if || !proc_if->attr.is_bind_c) |
| { |
| gfc_error ("BIND(C) attribute at %C requires " |
| "an interface with BIND(C)"); |
| return MATCH_ERROR; |
| } |
| /* Check for C1217. */ |
| if (has_name_equals && sym->attr.pointer) |
| { |
| gfc_error ("BIND(C) procedure with NAME may not have " |
| "POINTER attribute at %C"); |
| return MATCH_ERROR; |
| } |
| if (has_name_equals && sym->attr.dummy) |
| { |
| gfc_error ("Dummy procedure at %C may not have " |
| "BIND(C) attribute with NAME"); |
| return MATCH_ERROR; |
| } |
| /* Set binding label for BIND(C). */ |
| if (set_binding_label (&sym->binding_label, sym->name, num) |
| != SUCCESS) |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (add_hidden_procptr_result (sym) == SUCCESS) |
| sym = sym->result; |
| |
| if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| /* Set interface. */ |
| if (proc_if != NULL) |
| { |
| if (sym->ts.type != BT_UNKNOWN) |
| { |
| gfc_error ("Procedure '%s' at %L already has basic type of %s", |
| sym->name, &gfc_current_locus, |
| gfc_basic_typename (sym->ts.type)); |
| return MATCH_ERROR; |
| } |
| sym->ts.interface = proc_if; |
| sym->attr.untyped = 1; |
| sym->attr.if_source = IFSRC_IFBODY; |
| } |
| else if (current_ts.type != BT_UNKNOWN) |
| { |
| if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
| return MATCH_ERROR; |
| sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
| sym->ts.interface->ts = current_ts; |
| sym->ts.interface->attr.flavor = FL_PROCEDURE; |
| sym->ts.interface->attr.function = 1; |
| sym->attr.function = 1; |
| sym->attr.if_source = IFSRC_UNKNOWN; |
| } |
| |
| 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 = match_pointer_init (&initializer, 1); |
| if (m != MATCH_YES) |
| goto cleanup; |
| |
| if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) |
| != SUCCESS) |
| goto cleanup; |
| |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| return MATCH_YES; |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| syntax: |
| gfc_error ("Syntax error in PROCEDURE statement at %C"); |
| return MATCH_ERROR; |
| |
| cleanup: |
| /* Free stuff up and return. */ |
| gfc_free_expr (initializer); |
| return m; |
| } |
| |
| |
| static match |
| match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); |
| |
| |
| /* Match a procedure pointer component declaration (R445). */ |
| |
| static match |
| match_ppc_decl (void) |
| { |
| match m; |
| gfc_symbol *proc_if = NULL; |
| gfc_typespec ts; |
| int num; |
| gfc_component *c; |
| gfc_expr *initializer = NULL; |
| gfc_typebound_proc* tb; |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| |
| /* Parse interface (with brackets). */ |
| m = match_procedure_interface (&proc_if); |
| if (m != MATCH_YES) |
| goto syntax; |
| |
| /* Parse attributes. */ |
| tb = XCNEW (gfc_typebound_proc); |
| tb->where = gfc_current_locus; |
| m = match_binding_attributes (tb, false, true); |
| if (m == MATCH_ERROR) |
| return m; |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.procedure = 1; |
| current_attr.proc_pointer = 1; |
| current_attr.access = tb->access; |
| current_attr.flavor = FL_PROCEDURE; |
| |
| /* Match the colons (required). */ |
| if (gfc_match (" ::") != MATCH_YES) |
| { |
| gfc_error ("Expected '::' after binding-attributes at %C"); |
| return MATCH_ERROR; |
| } |
| |
| /* Check for C450. */ |
| if (!tb->nopass && proc_if == NULL) |
| { |
| gfc_error("NOPASS or explicit interface required at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_notify_std (GFC_STD_F2003, "Procedure pointer " |
| "component at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| /* Match PPC names. */ |
| ts = current_ts; |
| for(num=1;;num++) |
| { |
| m = gfc_match_name (name); |
| if (m == MATCH_NO) |
| goto syntax; |
| else if (m == MATCH_ERROR) |
| return m; |
| |
| if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) |
| return MATCH_ERROR; |
| |
| /* Add current_attr to the symbol attributes. */ |
| if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_add_external (&c->attr, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| c->tb = tb; |
| |
| /* Set interface. */ |
| if (proc_if != NULL) |
| { |
| c->ts.interface = proc_if; |
| c->attr.untyped = 1; |
| c->attr.if_source = IFSRC_IFBODY; |
| } |
| else if (ts.type != BT_UNKNOWN) |
| { |
| c->ts = ts; |
| c->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
| c->ts.interface->result = c->ts.interface; |
| c->ts.interface->ts = ts; |
| c->ts.interface->attr.flavor = FL_PROCEDURE; |
| c->ts.interface->attr.function = 1; |
| c->attr.function = 1; |
| c->attr.if_source = IFSRC_UNKNOWN; |
| } |
| |
| if (gfc_match (" =>") == MATCH_YES) |
| { |
| m = match_pointer_init (&initializer, 1); |
| if (m != MATCH_YES) |
| { |
| gfc_free_expr (initializer); |
| return m; |
| } |
| c->initializer = initializer; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| return MATCH_YES; |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| syntax: |
| gfc_error ("Syntax error in procedure pointer component at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Match a PROCEDURE declaration inside an interface (R1206). */ |
| |
| static match |
| match_procedure_in_interface (void) |
| { |
| match m; |
| gfc_symbol *sym; |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| locus old_locus; |
| |
| if (current_interface.type == INTERFACE_NAMELESS |
| || current_interface.type == INTERFACE_ABSTRACT) |
| { |
| gfc_error ("PROCEDURE at %C must be in a generic interface"); |
| return MATCH_ERROR; |
| } |
| |
| /* Check if the F2008 optional double colon appears. */ |
| gfc_gobble_whitespace (); |
| old_locus = gfc_current_locus; |
| if (gfc_match ("::") == MATCH_YES) |
| { |
| if (gfc_notify_std (GFC_STD_F2008, "double colon in " |
| "MODULE PROCEDURE statement at %L", &old_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| } |
| else |
| gfc_current_locus = old_locus; |
| |
| for(;;) |
| { |
| m = gfc_match_name (name); |
| if (m == MATCH_NO) |
| goto syntax; |
| else if (m == MATCH_ERROR) |
| return m; |
| if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) |
| return MATCH_ERROR; |
| |
| if (gfc_add_interface (sym) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| break; |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_error ("Syntax error in PROCEDURE statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* General matcher for PROCEDURE declarations. */ |
| |
| static match match_procedure_in_type (void); |
| |
| match |
| gfc_match_procedure (void) |
| { |
| match m; |
| |
| switch (gfc_current_state ()) |
| { |
| case COMP_NONE: |
| case COMP_PROGRAM: |
| case COMP_MODULE: |
| case COMP_SUBROUTINE: |
| case COMP_FUNCTION: |
| case COMP_BLOCK: |
| m = match_procedure_decl (); |
| break; |
| case COMP_INTERFACE: |
| m = match_procedure_in_interface (); |
| break; |
| case COMP_DERIVED: |
| m = match_ppc_decl (); |
| break; |
| case COMP_DERIVED_CONTAINS: |
| m = match_procedure_in_type (); |
| break; |
| default: |
| return MATCH_NO; |
| } |
| |
| if (m != MATCH_YES) |
| return m; |
| |
| if (gfc_notify_std (GFC_STD_F2003, "PROCEDURE statement at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| return m; |
| } |
| |
| |
| /* Warn if a matched procedure has the same name as an intrinsic; this is |
| simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current |
| parser-state-stack to find out whether we're in a module. */ |
| |
| static void |
| warn_intrinsic_shadow (const gfc_symbol* sym, bool func) |
| { |
| bool in_module; |
| |
| in_module = (gfc_state_stack->previous |
| && gfc_state_stack->previous->state == COMP_MODULE); |
| |
| gfc_warn_intrinsic_shadow (sym, in_module, func); |
| } |
| |
| |
| /* 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; |
| match suffix_match; |
| match found_match; /* Status returned by match func. */ |
| |
| 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 = gfc_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; |
| |
| if (add_hidden_procptr_result (sym) == SUCCESS) |
| sym = sym->result; |
| |
| 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; |
| |
| /* According to the draft, the bind(c) and result clause can |
| come in either order after the formal_arg_list (i.e., either |
| can be first, both can exist together or by themselves or neither |
| one). Therefore, the match_result can't match the end of the |
| string, and check for the bind(c) or result clause in either order. */ |
| found_match = gfc_match_eos (); |
| |
| /* Make sure that it isn't already declared as BIND(C). If it is, it |
| must have been marked BIND(C) with a BIND(C) attribute and that is |
| not allowed for procedures. */ |
| if (sym->attr.is_bind_c == 1) |
| { |
| sym->attr.is_bind_c = 0; |
| if (sym->old_symbol != NULL) |
| gfc_error_now ("BIND(C) attribute at %L can only be used for " |
| "variables or common blocks", |
| &(sym->old_symbol->declared_at)); |
| else |
| gfc_error_now ("BIND(C) attribute at %L can only be used for " |
| "variables or common blocks", &gfc_current_locus); |
| } |
| |
| if (found_match != MATCH_YES) |
| { |
| /* If we haven't found the end-of-statement, look for a suffix. */ |
| suffix_match = gfc_match_suffix (sym, &result); |
| if (suffix_match == MATCH_YES) |
| /* Need to get the eos now. */ |
| found_match = gfc_match_eos (); |
| else |
| found_match = suffix_match; |
| } |
| |
| if(found_match != MATCH_YES) |
| m = MATCH_ERROR; |
| else |
| { |
| /* 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; |
| |
| /* Delay matching the function characteristics until after the |
| specification block by signalling kind=-1. */ |
| sym->declared_at = old_loc; |
| if (current_ts.type != BT_UNKNOWN) |
| current_ts.kind = -1; |
| else |
| current_ts.kind = 0; |
| |
| if (result == NULL) |
| { |
| if (current_ts.type != BT_UNKNOWN |
| && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
| goto cleanup; |
| sym->result = sym; |
| } |
| else |
| { |
| if (current_ts.type != BT_UNKNOWN |
| && gfc_add_type (result, ¤t_ts, &gfc_current_locus) |
| == FAILURE) |
| goto cleanup; |
| sym->result = result; |
| } |
| |
| /* Warn if this procedure has the same name as an intrinsic. */ |
| warn_intrinsic_shadow (sym, true); |
| |
| 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; |
| enum gfc_symbol_type type; |
| |
| s = gfc_get_gsymbol(name); |
| type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
| |
| if (s->defined |
| || (s->type != GSYM_UNKNOWN |
| && s->type != type)) |
| gfc_global_used(s, NULL); |
| else |
| { |
| s->type = type; |
| s->where = gfc_current_locus; |
| s->defined = 1; |
| s->ns = gfc_current_ns; |
| 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; |
| char peek_char; |
| match is_bind_c; |
| |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (gfc_notify_std (GFC_STD_F2008_OBS, |
| "ENTRY statement at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| 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: |
| case COMP_DO_CONCURRENT: |
| 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)) |
| return MATCH_ERROR; |
| |
| proc = gfc_current_block (); |
| |
| /* Make sure that it isn't already declared as BIND(C). If it is, it |
| must have been marked BIND(C) with a BIND(C) attribute and that is |
| not allowed for procedures. */ |
| if (entry->attr.is_bind_c == 1) |
| { |
| entry->attr.is_bind_c = 0; |
| if (entry->old_symbol != NULL) |
| gfc_error_now ("BIND(C) attribute at %L can only be used for " |
| "variables or common blocks", |
| &(entry->old_symbol->declared_at)); |
| else |
| gfc_error_now ("BIND(C) attribute at %L can only be used for " |
| "variables or common blocks", &gfc_current_locus); |
| } |
| |
| /* Check what next non-whitespace character is so we can tell if there |
| is the required parens if we have a BIND(C). */ |
| gfc_gobble_whitespace (); |
| peek_char = gfc_peek_ascii_char (); |
| |
| if (state == COMP_SUBROUTINE) |
| { |
| /* An entry in a subroutine. */ |
| if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
| return MATCH_ERROR; |
| |
| m = gfc_match_formal_arglist (entry, 0, 1); |
| if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
| never be an internal procedure. */ |
| is_bind_c = gfc_match_bind_c (entry, true); |
| if (is_bind_c == MATCH_ERROR) |
| return MATCH_ERROR; |
| if (is_bind_c == MATCH_YES) |
| { |
| if (peek_char != '(') |
| { |
| gfc_error ("Missing required parentheses before BIND(C) at %C"); |
| return MATCH_ERROR; |
| } |
| if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) |
| == FAILURE) |
| 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 (!gfc_current_ns->parent && !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 = gfc_match_suffix (entry, &result); |
| if (m == MATCH_NO) |
| gfc_syntax_error (ST_ENTRY); |
| if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| if (result) |
| { |
| 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; |
| } |
| else |
| { |
| 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; |
| } |
| } |
| } |
| |
| 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; |
| match is_bind_c; |
| char peek_char; |
| bool allow_binding_name; |
| |
| if (gfc_current_state () != COMP_NONE |
| && gfc_current_state () != COMP_INTERFACE |
| && gfc_current_state () != COMP_CONTAINS) |
| return MATCH_NO; |
| |
| m = gfc_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; |
| |
| /* Set declared_at as it might point to, e.g., a PUBLIC statement, if |
| the symbol existed before. */ |
| sym->declared_at = gfc_current_locus; |
| |
| if (add_hidden_procptr_result (sym) == SUCCESS) |
| sym = sym->result; |
| |
| gfc_new_block = sym; |
| |
| /* Check what next non-whitespace character is so we can tell if there |
| is the required parens if we have a BIND(C). */ |
| gfc_gobble_whitespace (); |
| peek_char = gfc_peek_ascii_char (); |
| |
| 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; |
| |
| /* Make sure that it isn't already declared as BIND(C). If it is, it |
| must have been marked BIND(C) with a BIND(C) attribute and that is |
| not allowed for procedures. */ |
| if (sym->attr.is_bind_c == 1) |
| { |
| sym->attr.is_bind_c = 0; |
| if (sym->old_symbol != NULL) |
| gfc_error_now ("BIND(C) attribute at %L can only be used for " |
| "variables or common blocks", |
| &(sym->old_symbol->declared_at)); |
| else |
| gfc_error_now ("BIND(C) attribute at %L can only be used for " |
| "variables or common blocks", &gfc_current_locus); |
| } |
| |
| /* C binding names are not allowed for internal procedures. */ |
| if (gfc_current_state () == COMP_CONTAINS |
| && sym->ns->proc_name->attr.flavor != FL_MODULE) |
| allow_binding_name = false; |
| else |
| allow_binding_name = true; |
| |
| /* Here, we are just checking if it has the bind(c) attribute, and if |
| so, then we need to make sure it's all correct. If it doesn't, |
| we still need to continue matching the rest of the subroutine line. */ |
| is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
| if (is_bind_c == MATCH_ERROR) |
| { |
| /* There was an attempt at the bind(c), but it was wrong. An |
| error message should have been printed w/in the gfc_match_bind_c |
| so here we'll just return the MATCH_ERROR. */ |
| return MATCH_ERROR; |
| } |
| |
| if (is_bind_c == MATCH_YES) |
| { |
| /* The following is allowed in the Fortran 2008 draft. */ |
| if (gfc_current_state () == COMP_CONTAINS |
| && sym->ns->proc_name->attr.flavor != FL_MODULE |
| && gfc_notify_std (GFC_STD_F2008, "BIND(C) attribute " |
| "at %L may not be specified for an internal " |
| "procedure", &gfc_current_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (peek_char != '(') |
| { |
| gfc_error ("Missing required parentheses before BIND(C) at %C"); |
| return MATCH_ERROR; |
| } |
| if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) |
| == FAILURE) |
| 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; |
| |
| /* Warn if it has the same name as an intrinsic. */ |
| warn_intrinsic_shadow (sym, false); |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
| given, and set the binding label in either the given symbol (if not |
| NULL), or in the current_ts. The symbol may be NULL because we may |
| encounter the BIND(C) before the declaration itself. Return |
| MATCH_NO if what we're looking at isn't a BIND(C) specifier, |
| MATCH_ERROR if it is a BIND(C) clause but an error was encountered, |
| or MATCH_YES if the specifier was correct and the binding label and |
| bind(c) fields were set correctly for the given symbol or the |
| current_ts. If allow_binding_name is false, no binding name may be |
| given. */ |
| |
| match |
| gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
| { |
| /* binding label, if exists */ |
| const char* binding_label = NULL; |
| match double_quote; |
| match single_quote; |
| |
| /* Initialize the flag that specifies whether we encountered a NAME= |
| specifier or not. */ |
| has_name_equals = 0; |
| |
| /* This much we have to be able to match, in this order, if |
| there is a bind(c) label. */ |
| if (gfc_match (" bind ( c ") != MATCH_YES) |
| return MATCH_NO; |
| |
| /* Now see if there is a binding label, or if we've reached the |
| end of the bind(c) attribute without one. */ |
| if (gfc_match_char (',') == MATCH_YES) |
| { |
| if (gfc_match (" name = ") != MATCH_YES) |
| { |
| gfc_error ("Syntax error in NAME= specifier for binding label " |
| "at %C"); |
| /* should give an error message here */ |
| return MATCH_ERROR; |
| } |
| |
| has_name_equals = 1; |
| |
| /* Get the opening quote. */ |
| double_quote = MATCH_YES; |
| single_quote = MATCH_YES; |
| double_quote = gfc_match_char ('"'); |
| if (double_quote != MATCH_YES) |
| single_quote = gfc_match_char ('\''); |
| if (double_quote != MATCH_YES && single_quote != MATCH_YES) |
| { |
| gfc_error ("Syntax error in NAME= specifier for binding label " |
| "at %C"); |
| return MATCH_ERROR; |
| } |
| |
| /* Grab the binding label, using functions that will not lower |
| case the names automatically. */ |
| if (gfc_match_name_C (&binding_label) != MATCH_YES) |
| return MATCH_ERROR; |
| |
| /* Get the closing quotation. */ |
| if (double_quote == MATCH_YES) |
| { |
| if (gfc_match_char ('"') != MATCH_YES) |
| { |
| gfc_error ("Missing closing quote '\"' for binding label at %C"); |
| /* User started string with '"' so looked to match it. */ |
| return MATCH_ERROR; |
| } |
| } |
| else |
| { |
| if (gfc_match_char ('\'') != MATCH_YES) |
| { |
| gfc_error ("Missing closing quote '\'' for binding label at %C"); |
| /* User started string with "'" char. */ |
| return MATCH_ERROR; |
| } |
| } |
| } |
| |
| /* Get the required right paren. */ |
| if (gfc_match_char (')') != MATCH_YES) |
| { |
| gfc_error ("Missing closing paren for binding label at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (has_name_equals && !allow_binding_name) |
| { |
| gfc_error ("No binding name is allowed in BIND(C) at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (has_name_equals && sym != NULL && sym->attr.dummy) |
| { |
| gfc_error ("For dummy procedure %s, no binding name is " |
| "allowed in BIND(C) at %C", sym->name); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Save the binding label to the symbol. If sym is null, we're |
| probably matching the typespec attributes of a declaration and |
| haven't gotten the name yet, and therefore, no symbol yet. */ |
| if (binding_label) |
| { |
| if (sym != NULL) |
| sym->binding_label = binding_label; |
| else |
| curr_binding_label = binding_label; |
| } |
| else if (allow_binding_name) |
| { |
| /* No binding label, but if symbol isn't null, we |
| can set the label for it here. |
| If name="" or allow_binding_name is false, no C binding name is |
| created. */ |
| if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
| sym->binding_label = IDENTIFIER_POINTER (get_identifier (sym->name)); |
| } |
| |
| if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
| && current_interface.type == INTERFACE_ABSTRACT) |
| { |
| gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); |
| 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 = gfc_state_stack; |
| |
| 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 (!flag_short_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, END SELECT |
| and END BLOCK 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; |
| gfc_namespace *parent_ns, *ns, *prev_ns; |
| gfc_namespace **nsp; |
| |
| 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; |
| |
| switch (state) |
| { |
| case COMP_ASSOCIATE: |
| case COMP_BLOCK: |
| if (!strncmp (block_name, "block@", strlen("block@"))) |
| block_name = NULL; |
| break; |
| |
| case COMP_CONTAINS: |
| case COMP_DERIVED_CONTAINS: |
| state = gfc_state_stack->previous->state; |
| block_name = gfc_state_stack->previous->sym == NULL |
| ? NULL : gfc_state_stack->previous->sym->name; |
| break; |
| |
| default: |
| break; |
| } |
| |
| 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: |
| case COMP_DERIVED_CONTAINS: |
| *st = ST_END_TYPE; |
| target = " type"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_ASSOCIATE: |
| *st = ST_END_ASSOCIATE; |
| target = " associate"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_BLOCK: |
| *st = ST_END_BLOCK; |
| target = " block"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_IF: |
| *st = ST_ENDIF; |
| target = " if"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_DO: |
| case COMP_DO_CONCURRENT: |
| *st = ST_ENDDO; |
| target = " do"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_CRITICAL: |
| *st = ST_END_CRITICAL; |
| target = " critical"; |
| eos_ok = 0; |
| break; |
| |
| case COMP_SELECT: |
| case COMP_SELECT_TYPE: |
| *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 && (*st == ST_END_SUBROUTINE || *st == ST_END_FUNCTION)) |
| { |
| if (gfc_notify_std (GFC_STD_F2008, "END statement " |
| "instead of %s statement at %L", |
| gfc_ascii_statement (*st), &old_loc) == FAILURE) |
| goto cleanup; |
| } |
| else 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 |
| && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK |
| && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL) |
| return MATCH_YES; |
| |
| if (!block_name) |
| 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 && strcmp (block_name, "ppr@") != 0) |
| { |
| gfc_error ("Expected label '%s' for %s statement at %C", block_name, |
| gfc_ascii_statement (*st)); |
| goto cleanup; |
| } |
| /* Procedure pointer as function result. */ |
| else if (strcmp (block_name, "ppr@") == 0 |
| && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) |
| { |
| gfc_error ("Expected label '%s' for %s statement at %C", |
| gfc_current_block ()->ns->proc_name->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; |
| |
| /* If we are missing an END BLOCK, we created a half-ready namespace. |
| Remove it from the parent namespace's sibling list. */ |
| |
| if (state == COMP_BLOCK) |
| { |
| parent_ns = gfc_current_ns->parent; |
| |
| nsp = &(gfc_state_stack->previous->tail->ext.block.ns); |
| |
| prev_ns = NULL; |
| ns = *nsp; |
| while (ns) |
| { |
| if (ns == gfc_current_ns) |
| { |
| if (prev_ns == NULL) |
| *nsp = NULL; |
| else |
| prev_ns->sibling = ns->sibling; |
| } |
| prev_ns = ns; |
| ns = ns->sibling; |
| } |
| |
| gfc_free_namespace (gfc_current_ns); |
| gfc_current_ns = parent_ns; |
| } |
| |
| 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, false)) |
| return MATCH_ERROR; |
| |
| if (check_function_name (name) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| var_locus = gfc_current_locus; |
| |
| /* Deal with possible array specification for certain attributes. */ |
| if (current_attr.dimension |
| || current_attr.codimension |
| || current_attr.allocatable |
| || current_attr.pointer |
| || current_attr.target) |
| { |
| m = gfc_match_array_spec (&as, !current_attr.codimension, |
| !current_attr.dimension |
| && !current_attr.pointer |
| && !current_attr.target); |
| 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.dimension && sym->value) |
| { |
| gfc_error ("Dimensions specified for %s at %L after its " |
| "initialisation", sym->name, &var_locus); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (current_attr.codimension && m == MATCH_NO) |
| { |
| gfc_error ("Missing array specification at %L in CODIMENSION " |
| "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(). For CLASS variables, this must be applied |
| to the first component, or '_data' field. */ |
| if (sym->ts.type == BT_CLASS && sym->ts.u.derived->attr.is_class) |
| { |
| if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr, &var_locus) |
| == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| else |
| { |
| if (current_attr.dimension == 0 && current_attr.codimension == 0 |
| && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| } |
| |
| if (sym->ts.type == BT_CLASS |
| && gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false) == 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; |
| } |
| |
| add_hidden_procptr_result (sym); |
| |
| 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 = NULL; |
| 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, true, false); |
| 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; |
| |
| /* This is not allowed within a BLOCK construct! */ |
| if (gfc_current_state () == COMP_BLOCK) |
| { |
| gfc_error ("INTENT is not allowed inside of BLOCK at %C"); |
| return MATCH_ERROR; |
| } |
| |
| 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) |
| { |
| /* This is not allowed within a BLOCK construct! */ |
| if (gfc_current_state () == COMP_BLOCK) |
| { |
| gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C"); |
| return MATCH_ERROR; |
| } |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.optional = 1; |
| |
| return attr_decl (); |
| } |
| |
| |
| match |
| gfc_match_pointer (void) |
| { |
| gfc_gobble_whitespace (); |
| if (gfc_peek_ascii_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_codimension (void) |
| { |
| gfc_clear_attr (¤t_attr); |
| current_attr.codimension = 1; |
| |
| return attr_decl (); |
| } |
| |
| |
| match |
| gfc_match_contiguous (void) |
| { |
| if (gfc_notify_std (GFC_STD_F2008, "CONTIGUOUS statement at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| gfc_clear_attr (¤t_attr); |
| current_attr.contiguous = 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, *dt_sym; |
| gfc_intrinsic_op op; |
| match m; |
| |
| if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) |
| goto done; |
| |
| for (;;) |
| { |
| m = gfc_match_generic_spec (&type, name, &op); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| switch (type) |
| { |
| case INTERFACE_NAMELESS: |
| case INTERFACE_ABSTRACT: |
| 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; |
| |
| if (sym->attr.generic && (dt_sym = gfc_find_dt_in_generic (sym)) |
| && gfc_add_access (&dt_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[op] == ACCESS_UNKNOWN) |
| { |
| gfc_intrinsic_op other_op; |
| |
| gfc_current_ns->operator_access[op] = |
| (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
| |
| /* Handle the case if there is another op with the same |
| function, for INTRINSIC_EQ vs. INTRINSIC_EQ_OS and so on. */ |
| other_op = gfc_equivalent_op (op); |
| |
| if (other_op != INTRINSIC_NONE) |
| gfc_current_ns->operator_access[other_op] = |
| (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
| |
| } |
| else |
| { |
| gfc_error ("Access specification of the %s operator at %C has " |
| "already been specified", gfc_op2string (op)); |
| 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; |
| } |
| |
| |
| match |
| gfc_match_protected (void) |
| { |
| gfc_symbol *sym; |
| match m; |
| |
| if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) |
| { |
| gfc_error ("PROTECTED at %C only allowed in specification " |
| "part of a module"); |
| return MATCH_ERROR; |
| |
| } |
| |
| if (gfc_notify_std (GFC_STD_F2003, "PROTECTED statement at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) |
| { |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| goto syntax; |
| |
| for(;;) |
| { |
| m = gfc_match_symbol (&sym, 0); |
| switch (m) |
| { |
| case MATCH_YES: |
| if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| goto next_item; |
| |
| case MATCH_NO: |
| break; |
| |
| case MATCH_ERROR: |
| return MATCH_ERROR; |
| } |
| |
| 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 PROTECTED statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* The PRIVATE statement is a bit weird in that it can be an attribute |
| declaration, but also works as a standalone 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_MODULE |
| && !(gfc_current_state () == COMP_DERIVED |
| && gfc_state_stack->previous |
| && gfc_state_stack->previous->state == COMP_MODULE) |
| && !(gfc_current_state () == COMP_DERIVED_CONTAINS |
| && gfc_state_stack->previous && gfc_state_stack->previous->previous |
| && gfc_state_stack->previous->previous->state == COMP_MODULE)) |
| { |
| gfc_error ("PRIVATE statement at %C is only allowed in the " |
| "specification part of a module"); |
| return MATCH_ERROR; |
| } |
| |
| 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_current_state () != COMP_MODULE) |
| { |
| gfc_error ("PUBLIC statement at %C is only allowed in the " |
| "specification part of a module"); |
| return MATCH_ERROR; |
| } |
| |
| 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; |
| gfc_try t; |
| |
| 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, NULL, init) == FAILURE |
| || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
| { |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| if (sym->value) |
| { |
| gfc_error ("Initializing already initialized variable at %C"); |
| m = MATCH_ERROR; |
| goto cleanup; |
| } |
| |
| t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus); |
| return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; |
| |
| 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, SAVE_EXPLICIT, 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 |
| gfc_match_value (void) |
| { |
| gfc_symbol *sym; |
| match m; |
| |
| /* This is not allowed within a BLOCK construct! */ |
| if (gfc_current_state () == COMP_BLOCK) |
| { |
| gfc_error ("VALUE is not allowed inside of BLOCK at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_notify_std (GFC_STD_F2003, "VALUE statement at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) |
| { |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| goto syntax; |
| |
| for(;;) |
| { |
| m = gfc_match_symbol (&sym, 0); |
| switch (m) |
| { |
| case MATCH_YES: |
| if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| goto next_item; |
| |
| case MATCH_NO: |
| break; |
| |
| case MATCH_ERROR: |
| return MATCH_ERROR; |
| } |
| |
| 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 VALUE statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| match |
| gfc_match_volatile (void) |
| { |
| gfc_symbol *sym; |
| match m; |
| |
| if (gfc_notify_std (GFC_STD_F2003, "VOLATILE statement at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) |
| { |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| goto syntax; |
| |
| for(;;) |
| { |
| /* VOLATILE is special because it can be added to host-associated |
| symbols locally. Except for coarrays. */ |
| m = gfc_match_symbol (&sym, 1); |
| switch (m) |
| { |
| case MATCH_YES: |
| /* F2008, C560+C561. VOLATILE for host-/use-associated variable or |
| for variable in a BLOCK which is defined outside of the BLOCK. */ |
| if (sym->ns != gfc_current_ns && sym->attr.codimension) |
| { |
| gfc_error ("Specifying VOLATILE for coarray variable '%s' at " |
| "%C, which is use-/host-associated", sym->name); |
| return MATCH_ERROR; |
| } |
| if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| goto next_item; |
| |
| case MATCH_NO: |
| break; |
| |
| case MATCH_ERROR: |
| return MATCH_ERROR; |
| } |
| |
| 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 VOLATILE statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| match |
| gfc_match_asynchronous (void) |
| { |
| gfc_symbol *sym; |
| match m; |
| |
| if (gfc_notify_std (GFC_STD_F2003, "ASYNCHRONOUS statement at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) |
| { |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| goto syntax; |
| |
| for(;;) |
| { |
| /* ASYNCHRONOUS is special because it can be added to host-associated |
| symbols locally. */ |
| m = gfc_match_symbol (&sym, 1); |
| switch (m) |
| { |
| case MATCH_YES: |
| if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| goto next_item; |
| |
| case MATCH_NO: |
| break; |
| |
| case MATCH_ERROR: |
| return MATCH_ERROR; |
| } |
| |
| 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 ASYNCHRONOUS 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; |
| locus old_locus; |
| gfc_namespace *module_ns; |
| gfc_interface *old_interface_head, *interface; |
| |
| if (gfc_state_stack->state != COMP_INTERFACE |
| || gfc_state_stack->previous == NULL |
| || current_interface.type == INTERFACE_NAMELESS |
| || current_interface.type == INTERFACE_ABSTRACT) |
| { |
| gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
| "interface"); |
| return MATCH_ERROR; |
| } |
| |
| module_ns = gfc_current_ns->parent; |
| for (; module_ns; module_ns = module_ns->parent) |
| if (module_ns->proc_name->attr.flavor == FL_MODULE |
| || module_ns->proc_name->attr.flavor == FL_PROGRAM |
| || (module_ns->proc_name->attr.flavor == FL_PROCEDURE |
| && !module_ns->proc_name->attr.contained)) |
| break; |
| |
| if (module_ns == NULL) |
| return MATCH_ERROR; |
| |
| /* Store the current state of the interface. We will need it if we |
| end up with a syntax error and need to recover. */ |
| old_interface_head = gfc_current_interface_head (); |
| |
| /* Check if the F2008 optional double colon appears. */ |
| gfc_gobble_whitespace (); |
| old_locus = gfc_current_locus; |
| if (gfc_match ("::") == MATCH_YES) |
| { |
| if (gfc_notify_std (GFC_STD_F2008, "double colon in " |
| "MODULE PROCEDURE statement at %L", &old_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| } |
| else |
| gfc_current_locus = old_locus; |
| |
| for (;;) |
| { |
| bool last = false; |
| old_locus = gfc_current_locus; |
| |
| m = gfc_match_name (name); |
| if (m == MATCH_NO) |
| goto syntax; |
| if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| /* Check for syntax error before starting to add symbols to the |
| current namespace. */ |
| if (gfc_match_eos () == MATCH_YES) |
| last = true; |
| |
| if (!last && gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| |
| /* Now we're sure the syntax is valid, we process this item |
| further. */ |
| if (gfc_get_symbol (name, module_ns, &sym)) |
| return MATCH_ERROR; |
| |
| if (sym->attr.intrinsic) |
| { |
| gfc_error ("Intrinsic procedure at %L cannot be a MODULE " |
| "PROCEDURE", &old_locus); |
| 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; |
| sym->declared_at = old_locus; |
| |
| if (last) |
| break; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| /* Restore the previous state of the interface. */ |
| interface = gfc_current_interface_head (); |
| gfc_set_current_interface_head (old_interface_head); |
| |
| /* Free the new interfaces. */ |
| while (interface != old_interface_head) |
| { |
| gfc_interface *i = interface->next; |
| free (interface); |
| interface = i; |
| } |
| |
| /* And issue a syntax error. */ |
| gfc_syntax_error (ST_MODULE_PROC); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Check a derived type that is being extended. */ |
| static gfc_symbol* |
| check_extended_derived_type (char *name) |
| { |
| gfc_symbol *extended; |
| |
| if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) |
| { |
| gfc_error ("Ambiguous symbol in TYPE definition at %C"); |
| return NULL; |
| } |
| |
| if (!extended) |
| { |
| gfc_error ("No such symbol in TYPE definition at %C"); |
| return NULL; |
| } |
| |
| extended = gfc_find_dt_in_generic (extended); |
| |
| if (extended->attr.flavor != FL_DERIVED) |
| { |
| gfc_error ("'%s' in EXTENDS expression at %C is not a " |
| "derived type", name); |
| return NULL; |
| } |
| |
| if (extended->attr.is_bind_c) |
| { |
| gfc_error ("'%s' cannot be extended at %C because it " |
| "is BIND(C)", extended->name); |
| return NULL; |
| } |
| |
| if (extended->attr.sequence) |
| { |
| gfc_error ("'%s' cannot be extended at %C because it " |
| "is a SEQUENCE type", extended->name); |
| return NULL; |
| } |
| |
| return extended; |
| } |
| |
| |
| /* Match the optional attribute specifiers for a type declaration. |
| Return MATCH_ERROR if an error is encountered in one of the handled |
| attributes (public, private, bind(c)), MATCH_NO if what's found is |
| not a handled attribute, and MATCH_YES otherwise. TODO: More error |
| checking on attribute conflicts needs to be done. */ |
| |
| match |
| gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
| { |
| /* See if the derived type is marked as private. */ |
| if (gfc_match (" , private") == MATCH_YES) |
| { |
| if (gfc_current_state () != COMP_MODULE) |
| { |
| gfc_error ("Derived type at %C can only be PRIVATE in the " |
| "specification part of a module"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
| return MATCH_ERROR; |
| } |
| else if (gfc_match (" , public") == MATCH_YES) |
| { |
| if (gfc_current_state () != COMP_MODULE) |
| { |
| gfc_error ("Derived type at %C can only be PUBLIC in the " |
| "specification part of a module"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
| return MATCH_ERROR; |
| } |
| else if (gfc_match (" , bind ( c )") == MATCH_YES) |
| { |
| /* If the type is defined to be bind(c) it then needs to make |
| sure that all fields are interoperable. This will |
| need to be a semantic check on the finished derived type. |
| See 15.2.3 (lines 9-12) of F2003 draft. */ |
| if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) |
| return MATCH_ERROR; |
| |
| /* TODO: attr conflicts need to be checked, probably in symbol.c. */ |
| } |
| else if (gfc_match (" , abstract") == MATCH_YES) |
| { |
| if (gfc_notify_std (GFC_STD_F2003, "ABSTRACT type at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) |
| return MATCH_ERROR; |
| } |
| else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
| { |
| if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
| return MATCH_ERROR; |
| } |
| else |
| return MATCH_NO; |
| |
| /* If we get here, something matched. */ |
| return MATCH_YES; |
| } |
| |
| |
| /* 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]; |
| char parent[GFC_MAX_SYMBOL_LEN + 1]; |
| symbol_attribute attr; |
| gfc_symbol *sym, *gensym; |
| gfc_symbol *extended; |
| match m; |
| match is_type_attr_spec = MATCH_NO; |
| bool seen_attr = false; |
| gfc_interface *intr = NULL, *head; |
| |
| if (gfc_current_state () == COMP_DERIVED) |
| return MATCH_NO; |
| |
| name[0] = '\0'; |
| parent[0] = '\0'; |
| gfc_clear_attr (&attr); |
| extended = NULL; |
| |
| do |
| { |
| is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
| if (is_type_attr_spec == MATCH_ERROR) |
| return MATCH_ERROR; |
| if (is_type_attr_spec == MATCH_YES) |
| seen_attr = true; |
| } while (is_type_attr_spec == MATCH_YES); |
| |
| /* Deal with derived type extensions. The extension attribute has |
| been added to 'attr' but now the parent type must be found and |
| checked. */ |
| if (parent[0]) |
| extended = check_extended_derived_type (parent); |
| |
| if (parent[0] && !extended) |
| return MATCH_ERROR; |
| |
| if (gfc_match (" ::") != MATCH_YES && seen_attr) |
| { |
| 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 is not the name of an intrinsic type. */ |
| if (gfc_is_intrinsic_typename (name)) |
| { |
| 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, &gensym)) |
| return MATCH_ERROR; |
| |
| if (!gensym->attr.generic && gensym->ts.type != BT_UNKNOWN) |
| { |
| gfc_error ("Derived type name '%s' at %C already has a basic type " |
| "of %s", gensym->name, gfc_typename (&gensym->ts)); |
| return MATCH_ERROR; |
| } |
| |
| if (!gensym->attr.generic |
| && gfc_add_generic (&gensym->attr, gensym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| if (!gensym->attr.function |
| && gfc_add_function (&gensym->attr, gensym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| sym = gfc_find_dt_in_generic (gensym); |
| |
| if (sym && (sym->components != NULL || sym->attr.zero_comp)) |
| { |
| gfc_error ("Derived type definition of '%s' at %C has already been " |
| "defined", sym->name); |
| return MATCH_ERROR; |
| } |
| |
| if (!sym) |
| { |
| /* Use upper case to save the actual derived-type symbol. */ |
| gfc_get_symbol (gfc_get_string ("%c%s", |
| (char) TOUPPER ((unsigned char) gensym->name[0]), |
| &gensym->name[1]), NULL, &sym); |
| sym->name = gfc_get_string (gensym->name); |
| head = gensym->generic; |
| intr = gfc_get_interface (); |
| intr->sym = sym; |
| intr->where = gfc_current_locus; |
| intr->sym->declared_at = gfc_current_locus; |
| intr->next = head; |
| gensym->generic = intr; |
| gensym->attr.if_source = IFSRC_DECL; |
| } |
| |
| /* 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 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 (attr.access != ACCESS_UNKNOWN |
| && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| else if (sym->attr.access == ACCESS_UNKNOWN |
| && gensym->attr.access != ACCESS_UNKNOWN |
| && gfc_add_access (&sym->attr, gensym->attr.access, sym->name, NULL) |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| if (sym->attr.access != ACCESS_UNKNOWN |
| && gensym->attr.access == ACCESS_UNKNOWN) |
| gensym->attr.access = sym->attr.access; |
| |
| /* See if the derived type was labeled as bind(c). */ |
| if (attr.is_bind_c != 0) |
| sym->attr.is_bind_c = attr.is_bind_c; |
| |
| /* Construct the f2k_derived namespace if it is not yet there. */ |
| if (!sym->f2k_derived) |
| sym->f2k_derived = gfc_get_namespace (NULL, 0); |
| |
| if (extended && !sym->components) |
| { |
| gfc_component *p; |
| gfc_symtree *st; |
| |
| /* Add the extended derived type as the first component. */ |
| gfc_add_component (sym, parent, &p); |
| extended->refs++; |
| gfc_set_sym_referenced (extended); |
| |
| p->ts.type = BT_DERIVED; |
| p->ts.u.derived = extended; |
| p->initializer = gfc_default_initializer (&p->ts); |
| |
| /* Set extension level. */ |
| if (extended->attr.extension == 255) |
| { |
| /* Since the extension field is 8 bit wide, we can only have |
| up to 255 extension levels. */ |
| gfc_error ("Maximum extension level reached with type '%s' at %L", |
| extended->name, &extended->declared_at); |
| return MATCH_ERROR; |
| } |
| sym->attr.extension = extended->attr.extension + 1; |
| |
| /* Provide the links between the extended type and its extension. */ |
| if (!extended->f2k_derived) |
| extended->f2k_derived = gfc_get_namespace (NULL, 0); |
| st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); |
| st->n.sym = sym; |
| } |
| |
| if (!sym->hash_value) |
| /* Set the hash for the compound name for this type. */ |
| sym->hash_value = gfc_hash_value (sym); |
| |
| /* Take over the ABSTRACT attribute. */ |
| sym->attr.abstract = attr.abstract; |
| |
| gfc_new_block = sym; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Cray Pointees can be declared as: |
| pointer (ipt, a (n,m,...,*)) */ |
| |
| match |
| 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->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, "ENUM and ENUMERATOR at %C") |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| return MATCH_YES; |
| } |
| |
| |
| /* Returns an initializer whose value is one higher than the value of the |
| LAST_INITIALIZER argument. If the argument is NULL, the |
| initializers value will be set to zero. The initializer's kind |
| will be set to gfc_c_int_kind. |
| |
| If -fshort-enums is given, the appropriate kind will be selected |
| later after all enumerators have been parsed. A warning is issued |
| here if an initializer exceeds gfc_c_int_kind. */ |
| |
| static gfc_expr * |
| enum_initializer (gfc_expr *last_initializer, locus where) |
| { |
| gfc_expr *result; |
| result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where); |
| |
| mpz_init (result->value.integer); |
| |
| if (last_initializer != NULL) |
| { |
| mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); |
| result->where = last_initializer->where; |
| |
| if (gfc_check_integer_range (result->value.integer, |
| gfc_c_int_kind) != ARITH_OK) |
| { |
| gfc_error ("Enumerator exceeds the C integer type at %C"); |
| return NULL; |
| } |
| } |
| else |
| { |
| /* Control comes here, if it's the very first enumerator and no |
| initializer has been given. It will be initialized to zero. */ |
| mpz_set_si (result->value.integer, 0); |
| } |
| |
| return result; |
| } |
| |
| |
| /* 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; |
| gfc_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, false, &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 = 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; |
| 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; |
| gfc_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) |
| { |
| gfc_free_enum_history (); |
| 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; |
| |
| } |
| |
| |
| /* Match binding attributes. */ |
| |
| static match |
| match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
| { |
| bool found_passing = false; |
| bool seen_ptr = false; |
| match m = MATCH_YES; |
| |
| /* Initialize to defaults. Do so even before the MATCH_NO check so that in |
| this case the defaults are in there. */ |
| ba->access = ACCESS_UNKNOWN; |
| ba->pass_arg = NULL; |
| ba->pass_arg_num = 0; |
| ba->nopass = 0; |
| ba->non_overridable = 0; |
| ba->deferred = 0; |
| ba->ppc = ppc; |
| |
| /* If we find a comma, we believe there are binding attributes. */ |
| m = gfc_match_char (','); |
| if (m == MATCH_NO) |
| goto done; |
| |
| do |
| { |
| /* Access specifier. */ |
| |
| m = gfc_match (" public"); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_YES) |
| { |
| if (ba->access != ACCESS_UNKNOWN) |
| { |
| gfc_error ("Duplicate access-specifier at %C"); |
| goto error; |
| } |
| |
| ba->access = ACCESS_PUBLIC; |
| continue; |
| } |
| |
| m = gfc_match (" private"); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_YES) |
| { |
| if (ba->access != ACCESS_UNKNOWN) |
| { |
| gfc_error ("Duplicate access-specifier at %C"); |
| goto error; |
| } |
| |
| ba->access = ACCESS_PRIVATE; |
| continue; |
| } |
| |
| /* If inside GENERIC, the following is not allowed. */ |
| if (!generic) |
| { |
| |
| /* NOPASS flag. */ |
| m = gfc_match (" nopass"); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_YES) |
| { |
| if (found_passing) |
| { |
| gfc_error ("Binding attributes already specify passing," |
| " illegal NOPASS at %C"); |
| goto error; |
| } |
| |
| found_passing = true; |
| ba->nopass = 1; |
| continue; |
| } |
| |
| /* PASS possibly including argument. */ |
| m = gfc_match (" pass"); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_YES) |
| { |
| char arg[GFC_MAX_SYMBOL_LEN + 1]; |
| |
| if (found_passing) |
| { |
| gfc_error ("Binding attributes already specify passing," |
| " illegal PASS at %C"); |
| goto error; |
| } |
| |
| m = gfc_match (" ( %n )", arg); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_YES) |
| ba->pass_arg = gfc_get_string (arg); |
| gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
| |
| found_passing = true; |
| ba->nopass = 0; |
| continue; |
| } |
| |
| if (ppc) |
| { |
| /* POINTER flag. */ |
| m = gfc_match (" pointer"); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_YES) |
| { |
| if (seen_ptr) |
| { |
| gfc_error ("Duplicate POINTER attribute at %C"); |
| goto error; |
| } |
| |
| seen_ptr = true; |
| continue; |
| } |
| } |
| else |
| { |
| /* NON_OVERRIDABLE flag. */ |
| m = gfc_match (" non_overridable"); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_YES) |
| { |
| if (ba->non_overridable) |
| { |
| gfc_error ("Duplicate NON_OVERRIDABLE at %C"); |
| goto error; |
| } |
| |
| ba->non_overridable = 1; |
| continue; |
| } |
| |
| /* DEFERRED flag. */ |
| m = gfc_match (" deferred"); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_YES) |
| { |
| if (ba->deferred) |
| { |
| gfc_error ("Duplicate DEFERRED at %C"); |
| goto error; |
| } |
| |
| ba->deferred = 1; |
| continue; |
| } |
| } |
| |
| } |
| |
| /* Nothing matching found. */ |
| if (generic) |
| gfc_error ("Expected access-specifier at %C"); |
| else |
| gfc_error ("Expected binding attribute at %C"); |
| goto error; |
| } |
| while (gfc_match_char (',') == MATCH_YES); |
| |
| /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
| if (ba->non_overridable && ba->deferred) |
| { |
| gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); |
| goto error; |
| } |
| |
| m = MATCH_YES; |
| |
| done: |
| if (ba->access == ACCESS_UNKNOWN) |
| ba->access = gfc_typebound_default_access; |
| |
| if (ppc && !seen_ptr) |
| { |
| gfc_error ("POINTER attribute is required for procedure pointer component" |
| " at %C"); |
| goto error; |
| } |
| |
| return m; |
| |
| error: |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Match a PROCEDURE specific binding inside a derived type. */ |
| |
| static match |
| match_procedure_in_type (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| char target_buf[GFC_MAX_SYMBOL_LEN + 1]; |
| char* target = NULL, *ifc = NULL; |
| gfc_typebound_proc tb; |
| bool seen_colons; |
| bool seen_attrs; |
| match m; |
| gfc_symtree* stree; |
| gfc_namespace* ns; |
| gfc_symbol* block; |
| int num; |
| |
| /* Check current state. */ |
| gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); |
| block = gfc_state_stack->previous->sym; |
| gcc_assert (block); |
| |
| /* Try to match PROCEDURE(interface). */ |
| if (gfc_match (" (") == MATCH_YES) |
| { |
| m = gfc_match_name (target_buf); |
| if (m == MATCH_ERROR) |
| return m; |
| if (m != MATCH_YES) |
| { |
| gfc_error ("Interface-name expected after '(' at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_match (" )") != MATCH_YES) |
| { |
| gfc_error ("')' expected at %C"); |
| return MATCH_ERROR; |
| } |
| |
| ifc = target_buf; |
| } |
| |
| /* Construct the data structure. */ |
| memset (&tb, 0, sizeof (tb)); |
| tb.where = gfc_current_locus; |
| |
| /* Match binding attributes. */ |
| m = match_binding_attributes (&tb, false, false); |
| if (m == MATCH_ERROR) |
| return m; |
| seen_attrs = (m == MATCH_YES); |
| |
| /* Check that attribute DEFERRED is given if an interface is specified. */ |
| if (tb.deferred && !ifc) |
| { |
| gfc_error ("Interface must be specified for DEFERRED binding at %C"); |
| return MATCH_ERROR; |
| } |
| if (ifc && !tb.deferred) |
| { |
| gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); |
| return MATCH_ERROR; |
| } |
| |
| /* Match the colons. */ |
| m = gfc_match (" ::"); |
| if (m == MATCH_ERROR) |
| return m; |
| seen_colons = (m == MATCH_YES); |
| if (seen_attrs && !seen_colons) |
| { |
| gfc_error ("Expected '::' after binding-attributes at %C"); |
| return MATCH_ERROR; |
| } |
| |
| /* Match the binding names. */ |
| for(num=1;;num++) |
| { |
| m = gfc_match_name (name); |
| if (m == MATCH_ERROR) |
| return m; |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Expected binding name at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (num>1 && gfc_notify_std (GFC_STD_F2008, "PROCEDURE list" |
| " at %C") == FAILURE) |
| return MATCH_ERROR; |
| |
| /* Try to match the '=> target', if it's there. */ |
| target = ifc; |
| m = gfc_match (" =>"); |
| if (m == MATCH_ERROR) |
| return m; |
| if (m == MATCH_YES) |
| { |
| if (tb.deferred) |
| { |
| gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (!seen_colons) |
| { |
| gfc_error ("'::' needed in PROCEDURE binding with explicit target" |
| " at %C"); |
| return MATCH_ERROR; |
| } |
| |
| m = gfc_match_name (target_buf); |
| if (m == MATCH_ERROR) |
| return m; |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Expected binding target after '=>' at %C"); |
| return MATCH_ERROR; |
| } |
| target = target_buf; |
| } |
| |
| /* If no target was found, it has the same name as the binding. */ |
| if (!target) |
| target = name; |
| |
| /* Get the namespace to insert the symbols into. */ |
| ns = block->f2k_derived; |
| gcc_assert (ns); |
| |
| /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
| if (tb.deferred && !block->attr.abstract) |
| { |
| gfc_error ("Type '%s' containing DEFERRED binding at %C " |
| "is not ABSTRACT", block->name); |
| return MATCH_ERROR; |
| } |
| |
| /* See if we already have a binding with this name in the symtree which |
| would be an error. If a GENERIC already targetted this binding, it may |
| be already there but then typebound is still NULL. */ |
| stree = gfc_find_symtree (ns->tb_sym_root, name); |
| if (stree && stree->n.tb) |
| { |
| gfc_error ("There is already a procedure with binding name '%s' for " |
| "the derived type '%s' at %C", name, block->name); |
| return MATCH_ERROR; |
| } |
| |
| /* Insert it and set attributes. */ |
| |
| if (!stree) |
| { |
| stree = gfc_new_symtree (&ns->tb_sym_root, name); |
| gcc_assert (stree); |
| } |
| stree->n.tb = gfc_get_typebound_proc (&tb); |
| |
| if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific, |
| false)) |
| return MATCH_ERROR; |
| gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym); |
| |
| if (gfc_match_eos () == MATCH_YES) |
| return MATCH_YES; |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| syntax: |
| gfc_error ("Syntax error in PROCEDURE statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Match a GENERIC procedure binding inside a derived type. */ |
| |
| match |
| gfc_match_generic (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ |
| gfc_symbol* block; |
| gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ |
| gfc_typebound_proc* tb; |
| gfc_namespace* ns; |
| interface_type op_type; |
| gfc_intrinsic_op op; |
| match m; |
| |
| /* Check current state. */ |
| if (gfc_current_state () == COMP_DERIVED) |
| { |
| gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); |
| return MATCH_ERROR; |
| } |
| if (gfc_current_state () != COMP_DERIVED_CONTAINS) |
| return MATCH_NO; |
| block = gfc_state_stack->previous->sym; |
| ns = block->f2k_derived; |
| gcc_assert (block && ns); |
| |
| memset (&tbattr, 0, sizeof (tbattr)); |
| tbattr.where = gfc_current_locus; |
| |
| /* See if we get an access-specifier. */ |
| m = match_binding_attributes (&tbattr, true, false); |
| if (m == MATCH_ERROR) |
| goto error; |
| |
| /* Now the colons, those are required. */ |
| if (gfc_match (" ::") != MATCH_YES) |
| { |
| gfc_error ("Expected '::' at %C"); |
| goto error; |
| } |
| |
| /* Match the binding name; depending on type (operator / generic) format |
| it for future error messages into bind_name. */ |
| |
| m = gfc_match_generic_spec (&op_type, name, &op); |
| if (m == MATCH_ERROR) |
| return MATCH_ERROR; |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Expected generic name or operator descriptor at %C"); |
| goto error; |
| } |
| |
| switch (op_type) |
| { |
| case INTERFACE_GENERIC: |
| snprintf (bind_name, sizeof (bind_name), "%s", name); |
| break; |
| |
| case INTERFACE_USER_OP: |
| snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name); |
| break; |
| |
| case INTERFACE_INTRINSIC_OP: |
| snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)", |
| gfc_op2string (op)); |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| |
| /* Match the required =>. */ |
| if (gfc_match (" =>") != MATCH_YES) |
| { |
| gfc_error ("Expected '=>' at %C"); |
| goto error; |
| } |
| |
| /* Try to find existing GENERIC binding with this name / for this operator; |
| if there is something, check that it is another GENERIC and then extend |
| it rather than building a new node. Otherwise, create it and put it |
| at the right position. */ |
| |
| switch (op_type) |
| { |
| case INTERFACE_USER_OP: |
| case INTERFACE_GENERIC: |
| { |
| const bool is_op = (op_type == INTERFACE_USER_OP); |
| gfc_symtree* st; |
| |
| st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); |
| if (st) |
| { |
| tb = st->n.tb; |
| gcc_assert (tb); |
| } |
| else |
| tb = NULL; |
| |
| break; |
| } |
| |
| case INTERFACE_INTRINSIC_OP: |
| tb = ns->tb_op[op]; |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| |
| if (tb) |
| { |
| if (!tb->is_generic) |
| { |
| gcc_assert (op_type == INTERFACE_GENERIC); |
| gfc_error ("There's already a non-generic procedure with binding name" |
| " '%s' for the derived type '%s' at %C", |
| bind_name, block->name); |
| goto error; |
| } |
| |
| if (tb->access != tbattr.access) |
| { |
| gfc_error ("Binding at %C must have the same access as already" |
| " defined binding '%s'", bind_name); |
| goto error; |
| } |
| } |
| else |
| { |
| tb = gfc_get_typebound_proc (NULL); |
| tb->where = gfc_current_locus; |
| tb->access = tbattr.access; |
| tb->is_generic = 1; |
| tb->u.generic = NULL; |
| |
| switch (op_type) |
| { |
| case INTERFACE_GENERIC: |
| case INTERFACE_USER_OP: |
| { |
| const bool is_op = (op_type == INTERFACE_USER_OP); |
| gfc_symtree* st; |
| |
| st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root, |
| name); |
| gcc_assert (st); |
| st->n.tb = tb; |
| |
| break; |
| } |
| |
| case INTERFACE_INTRINSIC_OP: |
| ns->tb_op[op] = tb; |
| break; |
| |
| default: |
| gcc_unreachable (); |
| } |
| } |
| |
| /* Now, match all following names as specific targets. */ |
| do |
| { |
| gfc_symtree* target_st; |
| gfc_tbp_generic* target; |
| |
| m = gfc_match_name (name); |
| if (m == MATCH_ERROR) |
| goto error; |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Expected specific binding name at %C"); |
| goto error; |
| } |
| |
| target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
| |
| /* See if this is a duplicate specification. */ |
| for (target = tb->u.generic; target; target = target->next) |
| if (target_st == target->specific_st) |
| { |
| gfc_error ("'%s' already defined as specific binding for the" |
| " generic '%s' at %C", name, bind_name); |
| goto error; |
| } |
| |
| target = gfc_get_tbp_generic (); |
| target->specific_st = target_st; |
| target->specific = NULL; |
| target->next = tb->u.generic; |
| target->is_operator = ((op_type == INTERFACE_USER_OP) |
| || (op_type == INTERFACE_INTRINSIC_OP)); |
| tb->u.generic = target; |
| } |
| while (gfc_match (" ,") == MATCH_YES); |
| |
| /* Here should be the end. */ |
| if (gfc_match_eos () != MATCH_YES) |
| { |
| gfc_error ("Junk after GENERIC binding at %C"); |
| goto error; |
| } |
| |
| return MATCH_YES; |
| |
| error: |
| return MATCH_ERROR; |
| } |
| |
| |
| /* Match a FINAL declaration inside a derived type. */ |
| |
| match |
| gfc_match_final_decl (void) |
| { |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| gfc_symbol* sym; |
| match m; |
| gfc_namespace* module_ns; |
| bool first, last; |
| gfc_symbol* block; |
| |
| if (gfc_current_form == FORM_FREE) |
| { |
| char c = gfc_peek_ascii_char (); |
| if (!gfc_is_whitespace (c) && c != ':') |
| return MATCH_NO; |
| } |
| |
| if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
| { |
| if (gfc_current_form == FORM_FIXED) |
| return MATCH_NO; |
| |
| gfc_error ("FINAL declaration at %C must be inside a derived type " |
| "CONTAINS section"); |
| return MATCH_ERROR; |
| } |
| |
| block = gfc_state_stack->previous->sym; |
| gcc_assert (block); |
| |
| if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
| || gfc_state_stack->previous->previous->state != COMP_MODULE) |
| { |
| gfc_error ("Derived type declaration with FINAL at %C must be in the" |
| " specification part of a MODULE"); |
| return MATCH_ERROR; |
| } |
| |
| module_ns = gfc_current_ns; |
| gcc_assert (module_ns); |
| gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); |
| |
| /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ |
| if (gfc_match (" ::") == MATCH_ERROR) |
| return MATCH_ERROR; |
| |
| /* Match the sequence of procedure names. */ |
| first = true; |
| last = false; |
| do |
| { |
| gfc_finalizer* f; |
| |
| if (first && gfc_match_eos () == MATCH_YES) |
| { |
| gfc_error ("Empty FINAL at %C"); |
| return MATCH_ERROR; |
| } |
| |
| m = gfc_match_name (name); |
| if (m == MATCH_NO) |
| { |
| gfc_error ("Expected module procedure name at %C"); |
| return MATCH_ERROR; |
| } |
| else if (m != MATCH_YES) |
| return MATCH_ERROR; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| last = true; |
| if (!last && gfc_match_char (',') != MATCH_YES) |
| { |
| gfc_error ("Expected ',' at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_get_symbol (name, module_ns, &sym)) |
| { |
| gfc_error ("Unknown procedure name \"%s\" at %C", name); |
| return MATCH_ERROR; |
| } |
| |
| /* Mark the symbol as module procedure. */ |
| if (sym->attr.proc != PROC_MODULE |
| && gfc_add_procedure (&sym->attr, PROC_MODULE, |
| sym->name, NULL) == FAILURE) |
| return MATCH_ERROR; |
| |
| /* Check if we already have this symbol in the list, this is an error. */ |
| for (f = block->f2k_derived->finalizers; f; f = f->next) |
| if (f->proc_sym == sym) |
| { |
| gfc_error ("'%s' at %C is already defined as FINAL procedure!", |
| name); |
| return MATCH_ERROR; |
| } |
| |
| /* Add this symbol to the list of finalizers. */ |
| gcc_assert (block->f2k_derived); |
| ++sym->refs; |
| f = XCNEW (gfc_finalizer); |
| f->proc_sym = sym; |
| f->proc_tree = NULL; |
| f->where = gfc_current_locus; |
| f->next = block->f2k_derived->finalizers; |
| block->f2k_derived->finalizers = f; |
| |
| first = false; |
| } |
| while (!last); |
| |
| return MATCH_YES; |
| } |
| |
| |
| const ext_attr_t ext_attr_list[] = { |
| { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, |
| { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, |
| { "cdecl", EXT_ATTR_CDECL, "cdecl" }, |
| { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, |
| { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, |
| { NULL, EXT_ATTR_LAST, NULL } |
| }; |
| |
| /* Match a !GCC$ ATTRIBUTES statement of the form: |
| !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... |
| When we come here, we have already matched the !GCC$ ATTRIBUTES string. |
| |
| TODO: We should support all GCC attributes using the same syntax for |
| the attribute list, i.e. the list in C |
| __attributes(( attribute-list )) |
| matches then |
| !GCC$ ATTRIBUTES attribute-list :: |
| Cf. c-parser.c's c_parser_attributes; the data can then directly be |
| saved into a TREE. |
| |
| As there is absolutely no risk of confusion, we should never return |
| MATCH_NO. */ |
| match |
| gfc_match_gcc_attributes (void) |
| { |
| symbol_attribute attr; |
| char name[GFC_MAX_SYMBOL_LEN + 1]; |
| unsigned id; |
| gfc_symbol *sym; |
| match m; |
| |
| gfc_clear_attr (&attr); |
| for(;;) |
| { |
| char ch; |
| |
| if (gfc_match_name (name) != MATCH_YES) |
| return MATCH_ERROR; |
| |
| for (id = 0; id < EXT_ATTR_LAST; id++) |
| if (strcmp (name, ext_attr_list[id].name) == 0) |
| break; |
| |
| if (id == EXT_ATTR_LAST) |
| { |
| gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); |
| return MATCH_ERROR; |
| } |
| |
| if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) |
| == FAILURE) |
| return MATCH_ERROR; |
| |
| gfc_gobble_whitespace (); |
| ch = gfc_next_ascii_char (); |
| if (ch == ':') |
| { |
| /* This is the successful exit condition for the loop. */ |
| if (gfc_next_ascii_char () == ':') |
| break; |
| } |
| |
| if (ch == ',') |
| continue; |
| |
| goto syntax; |
| } |
| |
| if (gfc_match_eos () == MATCH_YES) |
| goto syntax; |
| |
| for(;;) |
| { |
| m = gfc_match_name (name); |
| if (m != MATCH_YES) |
| return m; |
| |
| if (find_special (name, &sym, true)) |
| return MATCH_ERROR; |
| |
| sym->attr.ext_attr |= attr.ext_attr; |
| |
| if (gfc_match_eos () == MATCH_YES) |
| break; |
| |
| if (gfc_match_char (',') != MATCH_YES) |
| goto syntax; |
| } |
| |
| return MATCH_YES; |
| |
| syntax: |
| gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); |
| return MATCH_ERROR; |
| } |