diff options
Diffstat (limited to 'gcc-4.8.1/gcc/fortran/decl.c')
| -rw-r--r-- | gcc-4.8.1/gcc/fortran/decl.c | 8717 |
1 files changed, 0 insertions, 8717 deletions
diff --git a/gcc-4.8.1/gcc/fortran/decl.c b/gcc-4.8.1/gcc/fortran/decl.c deleted file mode 100644 index 72c511c8b..000000000 --- a/gcc-4.8.1/gcc/fortran/decl.c +++ /dev/null @@ -1,8717 +0,0 @@ -/* 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; -} |