/* Routines for manipulation of expression nodes.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
- Foundation, Inc.
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
Contributed by Andy Vaught
This file is part of GCC.
gfc_expr *e;
e = gfc_getmem (sizeof (gfc_expr));
-
gfc_clear_ts (&e->ts);
e->shape = NULL;
e->ref = NULL;
/* Free an argument list and everything below it. */
void
-gfc_free_actual_arglist (gfc_actual_arglist * a1)
+gfc_free_actual_arglist (gfc_actual_arglist *a1)
{
gfc_actual_arglist *a2;
/* Copy an arglist structure and all of the arguments. */
gfc_actual_arglist *
-gfc_copy_actual_arglist (gfc_actual_arglist * p)
+gfc_copy_actual_arglist (gfc_actual_arglist *p)
{
gfc_actual_arglist *head, *tail, *new;
/* Free a list of reference structures. */
void
-gfc_free_ref_list (gfc_ref * p)
+gfc_free_ref_list (gfc_ref *p)
{
gfc_ref *q;
int i;
something else or the expression node belongs to another structure. */
static void
-free_expr0 (gfc_expr * e)
+free_expr0 (gfc_expr *e)
{
int n;
/* Free an expression node and everything beneath it. */
void
-gfc_free_expr (gfc_expr * e)
+gfc_free_expr (gfc_expr *e)
{
-
if (e == NULL)
return;
if (e->con_by_offset)
/* Graft the *src expression onto the *dest subexpression. */
void
-gfc_replace_expr (gfc_expr * dest, gfc_expr * src)
+gfc_replace_expr (gfc_expr *dest, gfc_expr *src)
{
-
free_expr0 (dest);
*dest = *src;
-
gfc_free (src);
}
failure is OK for some callers. */
const char *
-gfc_extract_int (gfc_expr * expr, int *result)
+gfc_extract_int (gfc_expr *expr, int *result)
{
-
if (expr->expr_type != EXPR_CONSTANT)
return _("Constant expression required at %C");
/* Recursively copy a list of reference structures. */
static gfc_ref *
-copy_ref (gfc_ref * src)
+copy_ref (gfc_ref *src)
{
gfc_array_ref *ar;
gfc_ref *dest;
}
-/* Detect whether an expression has any vector index array
- references. */
+/* Detect whether an expression has any vector index array references. */
int
gfc_has_vector_index (gfc_expr *e)
{
- gfc_ref * ref;
+ gfc_ref *ref;
int i;
for (ref = e->ref; ref; ref = ref->next)
if (ref->type == REF_ARRAY)
/* Copy a shape array. */
mpz_t *
-gfc_copy_shape (mpz_t * shape, int rank)
+gfc_copy_shape (mpz_t *shape, int rank)
{
mpz_t *new_shape;
int n;
*/
mpz_t *
-gfc_copy_shape_excluding (mpz_t * shape, int rank, gfc_expr * dim)
+gfc_copy_shape_excluding (mpz_t *shape, int rank, gfc_expr *dim)
{
mpz_t *new_shape, *s;
int i, n;
if (n < 0 || n >= rank)
return NULL;
- s = new_shape = gfc_get_shape (rank-1);
+ s = new_shape = gfc_get_shape (rank - 1);
for (i = 0; i < rank; i++)
{
if (i == n)
- continue;
+ continue;
mpz_init_set (*s, shape[i]);
s++;
}
return new_shape;
}
+
/* Given an expression pointer, return a copy of the expression. This
subroutine is recursive. */
gfc_expr *
-gfc_copy_expr (gfc_expr * p)
+gfc_copy_expr (gfc_expr *p)
{
gfc_expr *q;
char *s;
s = gfc_getmem (p->value.character.length + 1);
q->value.character.string = s;
- memcpy (s, p->value.character.string,
- p->value.character.length + 1);
+ memcpy (s, p->value.character.string, p->value.character.length + 1);
break;
}
switch (q->ts.type)
break;
case BT_REAL:
- gfc_set_model_kind (q->ts.kind);
- mpfr_init (q->value.real);
+ gfc_set_model_kind (q->ts.kind);
+ mpfr_init (q->value.real);
mpfr_set (q->value.real, p->value.real, GFC_RND_MODE);
break;
case BT_COMPLEX:
- gfc_set_model_kind (q->ts.kind);
- mpfr_init (q->value.complex.r);
- mpfr_init (q->value.complex.i);
+ gfc_set_model_kind (q->ts.kind);
+ mpfr_init (q->value.complex.r);
+ mpfr_init (q->value.complex.i);
mpfr_set (q->value.complex.r, p->value.complex.r, GFC_RND_MODE);
mpfr_set (q->value.complex.i, p->value.complex.i, GFC_RND_MODE);
break;
s = gfc_getmem (p->value.character.length + 1);
q->value.character.string = s;
- memcpy (s, p->value.character.string,
- p->value.character.length + 1);
+ memcpy (s, p->value.character.string, p->value.character.length + 1);
break;
case BT_LOGICAL:
kind numbers mean more precision for numeric types. */
int
-gfc_kind_max (gfc_expr * e1, gfc_expr * e2)
+gfc_kind_max (gfc_expr *e1, gfc_expr *e2)
{
-
return (e1->ts.kind > e2->ts.kind) ? e1->ts.kind : e2->ts.kind;
}
static int
numeric_type (bt type)
{
-
return type == BT_COMPLEX || type == BT_REAL || type == BT_INTEGER;
}
/* Returns nonzero if the typespec is a numeric type, zero otherwise. */
int
-gfc_numeric_ts (gfc_typespec * ts)
+gfc_numeric_ts (gfc_typespec *ts)
{
-
return numeric_type (ts->type);
}
/* Returns an expression node that is a logical constant. */
gfc_expr *
-gfc_logical_expr (int i, locus * where)
+gfc_logical_expr (int i, locus *where)
{
gfc_expr *p;
argument list with a NULL pointer terminating the list. */
gfc_expr *
-gfc_build_conversion (gfc_expr * e)
+gfc_build_conversion (gfc_expr *e)
{
gfc_expr *p;
1.0**2 stays as it is. */
void
-gfc_type_convert_binary (gfc_expr * e)
+gfc_type_convert_binary (gfc_expr *e)
{
gfc_expr *op1, *op2;
/* Kind conversions of same type. */
if (op1->ts.type == op2->ts.type)
{
-
if (op1->ts.kind == op2->ts.kind)
{
- /* No type conversions. */
+ /* No type conversions. */
e->ts = op1->ts;
goto done;
}
function expects that the expression has already been simplified. */
int
-gfc_is_constant_expr (gfc_expr * e)
+gfc_is_constant_expr (gfc_expr *e)
{
gfc_constructor *c;
gfc_actual_arglist *arg;
/* Try to collapse intrinsic expressions. */
static try
-simplify_intrinsic_op (gfc_expr * p, int type)
+simplify_intrinsic_op (gfc_expr *p, int type)
{
gfc_expr *op1, *op2, *result;
with gfc_simplify_expr(). */
static try
-simplify_constructor (gfc_constructor * c, int type)
+simplify_constructor (gfc_constructor *c, int type)
{
-
for (; c; c = c->next)
{
if (c->iterator
/* Pull a single array element out of an array constructor. */
static try
-find_array_element (gfc_constructor * cons, gfc_array_ref * ar,
- gfc_constructor ** rval)
+find_array_element (gfc_constructor *cons, gfc_array_ref *ar,
+ gfc_constructor **rval)
{
unsigned long nelemen;
int i;
/* Check the bounds. */
if (ar->as->upper[i]
- && (mpz_cmp (e->value.integer,
- ar->as->upper[i]->value.integer) > 0
- || mpz_cmp (e->value.integer,
- ar->as->lower[i]->value.integer) < 0))
+ && (mpz_cmp (e->value.integer, ar->as->upper[i]->value.integer) > 0
+ || mpz_cmp (e->value.integer,
+ ar->as->lower[i]->value.integer) < 0))
{
gfc_error ("index in dimension %d is out of bounds "
"at %L", i + 1, &ar->c_where[i]);
goto depart;
}
- mpz_sub (delta, e->value.integer,
- ar->as->lower[i]->value.integer);
+ mpz_sub (delta, e->value.integer, ar->as->lower[i]->value.integer);
mpz_add (offset, offset, delta);
}
/* Find a component of a structure constructor. */
static gfc_constructor *
-find_component_ref (gfc_constructor * cons, gfc_ref * ref)
+find_component_ref (gfc_constructor *cons, gfc_ref *ref)
{
gfc_component *comp;
gfc_component *pick;
the subobject reference in the process. */
static void
-remove_subobject_ref (gfc_expr * p, gfc_constructor * cons)
+remove_subobject_ref (gfc_expr *p, gfc_constructor *cons)
{
gfc_expr *e;
upper = ref->u.ar.as->upper[d];
if (ref->u.ar.dimen_type[d] == DIMEN_VECTOR) /* Vector subscript. */
- {
- gcc_assert(begin);
- gcc_assert(begin->expr_type == EXPR_ARRAY);
- gcc_assert(begin->rank == 1);
- gcc_assert(begin->shape);
+ {
+ gcc_assert (begin);
+ gcc_assert (begin->expr_type == EXPR_ARRAY);
+ gcc_assert (begin->rank == 1);
+ gcc_assert (begin->shape);
vecsub[d] = begin->value.constructor;
mpz_set (ctr[d], vecsub[d]->expr->value.integer);
for (c = vecsub[d]; c; c = c->next)
{
if (mpz_cmp (c->expr->value.integer, upper->value.integer) > 0
- || mpz_cmp (c->expr->value.integer, lower->value.integer) < 0)
+ || mpz_cmp (c->expr->value.integer,
+ lower->value.integer) < 0)
{
gfc_error ("index in dimension %d is out of bounds "
"at %L", d + 1, &ref->u.ar.c_where[d]);
goto cleanup;
}
}
- }
+ }
else
- {
+ {
if ((begin && begin->expr_type != EXPR_CONSTANT)
- || (finish && finish->expr_type != EXPR_CONSTANT)
- || (step && step->expr_type != EXPR_CONSTANT))
+ || (finish && finish->expr_type != EXPR_CONSTANT)
+ || (step && step->expr_type != EXPR_CONSTANT))
{
t = FAILURE;
goto cleanup;
mpz_div (tmp_mpz, tmp_mpz, stride[d]);
mpz_mul (nelts, nelts, tmp_mpz);
- /* An element reference reduces the rank of the expression; don't add
- anything to the shape array. */
+ /* An element reference reduces the rank of the expression; don't
+ add anything to the shape array. */
if (ref->u.ar.dimen_type[d] != DIMEN_ELEMENT)
mpz_set (expr->shape[shape_i++], tmp_mpz);
}
/* Now clock through the array reference, calculating the index in
the source constructor and transferring the elements to the new
constructor. */
- for (idx = 0; idx < (int)mpz_get_si (nelts); idx++)
+ for (idx = 0; idx < (int) mpz_get_si (nelts); idx++)
{
if (ref->u.ar.offset)
mpz_set (ptr, ref->u.ar.offset->value.integer);
for (d = 0; d < rank; d++)
{
mpz_set (tmp_mpz, ctr[d]);
- mpz_sub (tmp_mpz, tmp_mpz,
- ref->u.ar.as->lower[d]->value.integer);
+ mpz_sub (tmp_mpz, tmp_mpz, ref->u.ar.as->lower[d]->value.integer);
mpz_mul (tmp_mpz, tmp_mpz, delta[d]);
mpz_add (ptr, ptr, tmp_mpz);
if (!incr_ctr) continue;
- if (ref->u.ar.dimen_type[d] == DIMEN_VECTOR) /* Vector subscript. */
+ if (ref->u.ar.dimen_type[d] == DIMEN_VECTOR) /* Vector subscript. */
{
gcc_assert(vecsub[d]);
{
mpz_add (ctr[d], ctr[d], stride[d]);
- if (mpz_cmp_ui (stride[d], 0) > 0 ?
- mpz_cmp (ctr[d], end[d]) > 0 :
- mpz_cmp (ctr[d], end[d]) < 0)
+ if (mpz_cmp_ui (stride[d], 0) > 0
+ ? mpz_cmp (ctr[d], end[d]) > 0
+ : mpz_cmp (ctr[d], end[d]) < 0)
mpz_set (ctr[d], start[d]);
else
incr_ctr = false;
char *chr;
if (p->ref->u.ss.start->expr_type != EXPR_CONSTANT
- || p->ref->u.ss.end->expr_type != EXPR_CONSTANT)
+ || p->ref->u.ss.end->expr_type != EXPR_CONSTANT)
return FAILURE;
*newp = gfc_copy_expr (p);
chr = p->value.character.string;
- end = (int)mpz_get_ui (p->ref->u.ss.end->value.integer);
- start = (int)mpz_get_ui (p->ref->u.ss.start->value.integer);
+ end = (int) mpz_get_ui (p->ref->u.ss.end->value.integer);
+ start = (int) mpz_get_ui (p->ref->u.ss.start->value.integer);
(*newp)->value.character.length = end - start + 1;
strncpy ((*newp)->value.character.string, &chr[start - 1],
parameter variable values are substituted. */
static try
-simplify_const_ref (gfc_expr * p)
+simplify_const_ref (gfc_expr *p)
{
gfc_constructor *cons;
gfc_expr *newp;
switch (p->ref->u.ar.type)
{
case AR_ELEMENT:
- if (find_array_element (p->value.constructor,
- &p->ref->u.ar,
+ if (find_array_element (p->value.constructor, &p->ref->u.ar,
&cons) == FAILURE)
return FAILURE;
case AR_FULL:
if (p->ref->next != NULL
- && (p->ts.type == BT_CHARACTER || p->ts.type == BT_DERIVED))
+ && (p->ts.type == BT_CHARACTER || p->ts.type == BT_DERIVED))
{
cons = p->value.constructor;
for (; cons; cons = cons->next)
/* Simplify a chain of references. */
static try
-simplify_ref_chain (gfc_ref * ref, int type)
+simplify_ref_chain (gfc_ref *ref, int type)
{
int n;
case REF_ARRAY:
for (n = 0; n < ref->u.ar.dimen; n++)
{
- if (gfc_simplify_expr (ref->u.ar.start[n], type)
- == FAILURE)
+ if (gfc_simplify_expr (ref->u.ar.start[n], type) == FAILURE)
return FAILURE;
- if (gfc_simplify_expr (ref->u.ar.end[n], type)
- == FAILURE)
+ if (gfc_simplify_expr (ref->u.ar.end[n], type) == FAILURE)
return FAILURE;
- if (gfc_simplify_expr (ref->u.ar.stride[n], type)
- == FAILURE)
+ if (gfc_simplify_expr (ref->u.ar.stride[n], type) == FAILURE)
return FAILURE;
-
}
break;
/* Try to substitute the value of a parameter variable. */
static try
-simplify_parameter_variable (gfc_expr * p, int type)
+simplify_parameter_variable (gfc_expr *p, int type)
{
gfc_expr *e;
try t;
/* Only use the simplification if it eliminated all subobject
references. */
- if (t == SUCCESS && ! e->ref)
+ if (t == SUCCESS && !e->ref)
gfc_replace_expr (p, e);
else
gfc_free_expr (e);
The expression type is defined for:
0 Basic expression parsing
1 Simplifying array constructors -- will substitute
- iterator values.
+ iterator values.
Returns FAILURE on error, SUCCESS otherwise.
NOTE: Will return SUCCESS even if the expression can not be simplified. */
try
-gfc_simplify_expr (gfc_expr * p, int type)
+gfc_simplify_expr (gfc_expr *p, int type)
{
gfc_actual_arglist *ap;
gfc_extract_int (p->ref->u.ss.end, &end);
s = gfc_getmem (end - start + 2);
memcpy (s, p->value.character.string + start, end - start);
- s[end-start+1] = '\0'; /* TODO: C-style string for debugging. */
+ s[end - start + 1] = '\0'; /* TODO: C-style string. */
gfc_free (p->value.character.string);
p->value.character.string = s;
p->value.character.length = end - start;
case EXPR_VARIABLE:
/* Only substitute array parameter variables if we are in an
- initialization expression, or we want a subsection. */
+ initialization expression, or we want a subsection. */
if (p->symtree->n.sym->attr.flavor == FL_PARAMETER
&& (gfc_init_expr || p->ref
|| p->symtree->n.sym->value->expr_type != EXPR_ARRAY))
if (simplify_constructor (p->value.constructor, type) == FAILURE)
return FAILURE;
- if (p->expr_type == EXPR_ARRAY
- && p->ref && p->ref->type == REF_ARRAY
- && p->ref->u.ar.type == AR_FULL)
+ if (p->expr_type == EXPR_ARRAY && p->ref && p->ref->type == REF_ARRAY
+ && p->ref->u.ar.type == AR_FULL)
gfc_expand_constructor (p);
if (simplify_const_ref (p) == FAILURE)
be declared as. */
static bt
-et0 (gfc_expr * e)
+et0 (gfc_expr *e)
{
-
if (e->expr_type == EXPR_VARIABLE && gfc_check_iter_variable (e) == SUCCESS)
return BT_INTEGER;
static try check_init_expr (gfc_expr *);
static try
-check_intrinsic_op (gfc_expr * e, try (*check_function) (gfc_expr *))
+check_intrinsic_op (gfc_expr *e, try (*check_function) (gfc_expr *))
{
gfc_expr *op1 = e->value.op.op1;
gfc_expr *op2 = e->value.op.op2;
{
gfc_error ("Numeric or CHARACTER operands are required in "
"expression at %L", &e->where);
- return FAILURE;
+ return FAILURE;
}
break;
this problem here. */
static try
-check_inquiry (gfc_expr * e, int not_restricted)
+check_inquiry (gfc_expr *e, int not_restricted)
{
const char *name;
{
if (e->symtree->n.sym->ts.type == BT_UNKNOWN
&& gfc_set_default_type (e->symtree->n.sym, 0, gfc_current_ns)
- == FAILURE)
+ == FAILURE)
return FAILURE;
e->ts = e->symtree->n.sym->ts;
/* Assumed character length will not reduce to a constant expression
with LEN, as required by the standard. */
if (i == 4 && not_restricted
- && e->symtree->n.sym->ts.type == BT_CHARACTER
- && e->symtree->n.sym->ts.cl->length == NULL)
+ && e->symtree->n.sym->ts.type == BT_CHARACTER
+ && e->symtree->n.sym->ts.cl->length == NULL)
gfc_notify_std (GFC_STD_GNU, "assumed character length "
"variable '%s' in constant expression at %L",
e->symtree->n.sym->name, &e->where);
FAILURE is returned an error message has been generated. */
static try
-check_init_expr (gfc_expr * e)
+check_init_expr (gfc_expr *e)
{
gfc_actual_arglist *ap;
match m;
if (m == MATCH_NO)
gfc_error ("Function '%s' in initialization expression at %L "
"must be an intrinsic function",
- e->symtree->n.sym->name, &e->where);
+ e->symtree->n.sym->name, &e->where);
if (m != MATCH_YES)
t = FAILURE;
break;
}
+ if (gfc_in_match_data ())
+ break;
+
gfc_error ("Parameter '%s' at %L has not been declared or is "
"a variable, which does not reduce to a constant "
"expression", e->symtree->n.sym->name, &e->where);
expression, then reducing it to a constant. */
match
-gfc_match_init_expr (gfc_expr ** result)
+gfc_match_init_expr (gfc_expr **result)
{
gfc_expr *expr;
match m;
/* Not all inquiry functions are simplified to constant expressions
so it is necessary to call check_inquiry again. */
- if (!gfc_is_constant_expr (expr)
- && check_inquiry (expr, 1) == FAILURE)
+ if (!gfc_is_constant_expr (expr) && check_inquiry (expr, 1) == FAILURE
+ && !gfc_in_match_data ())
{
gfc_error ("Initialization expression didn't reduce %C");
return MATCH_ERROR;
}
-
static try check_restricted (gfc_expr *);
/* Given an actual argument list, test to see that each argument is a
integer or character. */
static try
-restricted_args (gfc_actual_arglist * a)
+restricted_args (gfc_actual_arglist *a)
{
for (; a; a = a->next)
{
/* Make sure a non-intrinsic function is a specification function. */
static try
-external_spec_function (gfc_expr * e)
+external_spec_function (gfc_expr *e)
{
gfc_symbol *f;
restricted expression. */
static try
-restricted_intrinsic (gfc_expr * e)
+restricted_intrinsic (gfc_expr *e)
{
/* TODO: Check constraints on inquiry functions. 7.1.6.2 (7). */
if (check_inquiry (e, 0) == SUCCESS)
return FAILURE. */
static try
-check_restricted (gfc_expr * e)
+check_restricted (gfc_expr *e)
{
gfc_symbol *sym;
try t;
break;
case EXPR_FUNCTION:
- t = e->value.function.esym ?
- external_spec_function (e) : restricted_intrinsic (e);
+ t = e->value.function.esym ? external_spec_function (e)
+ : restricted_intrinsic (e);
break;
break;
}
- /* gfc_is_formal_arg broadcasts that a formal argument list is being processed
- in resolve.c(resolve_formal_arglist). This is done so that host associated
- dummy array indices are accepted (PR23446). This mechanism also does the
- same for the specification expressions of array-valued functions. */
+ /* gfc_is_formal_arg broadcasts that a formal argument list is being
+ processed in resolve.c(resolve_formal_arglist). This is done so
+ that host associated dummy array indices are accepted (PR23446).
+ This mechanism also does the same for the specification expressions
+ of array-valued functions. */
if (sym->attr.in_common
|| sym->attr.use_assoc
|| sym->attr.dummy
we return FAILURE, an error has been generated. */
try
-gfc_specification_expr (gfc_expr * e)
+gfc_specification_expr (gfc_expr *e)
{
if (e == NULL)
return SUCCESS;
/* Given two expressions, make sure that the arrays are conformable. */
try
-gfc_check_conformance (const char *optype_msgid,
- gfc_expr * op1, gfc_expr * op2)
+gfc_check_conformance (const char *optype_msgid, gfc_expr *op1, gfc_expr *op2)
{
int op1_flag, op2_flag, d;
mpz_t op1_size, op2_size;
sure that the assignment can take place. */
try
-gfc_check_assign (gfc_expr * lvalue, gfc_expr * rvalue, int conform)
+gfc_check_assign (gfc_expr *lvalue, gfc_expr *rvalue, int conform)
{
gfc_symbol *sym;
+ gfc_ref *ref;
+ int has_pointer;
sym = lvalue->symtree->n.sym;
- if (sym->attr.intent == INTENT_IN)
+ /* Check INTENT(IN), unless the object itself is the component or
+ sub-component of a pointer. */
+ has_pointer = sym->attr.pointer;
+
+ for (ref = lvalue->ref; ref; ref = ref->next)
+ if (ref->type == REF_COMPONENT && ref->u.c.component->pointer)
+ {
+ has_pointer = 1;
+ break;
+ }
+
+ if (!has_pointer && sym->attr.intent == INTENT_IN)
{
- gfc_error ("Can't assign to INTENT(IN) variable '%s' at %L",
+ gfc_error ("Cannot assign to INTENT(IN) variable '%s' at %L",
sym->name, &lvalue->where);
return FAILURE;
}
variable local to a function subprogram. Its existence begins when
execution of the function is initiated and ends when execution of the
function is terminated.....
- Therefore, the left hand side is no longer a varaiable, when it is:*/
- if (sym->attr.flavor == FL_PROCEDURE
- && sym->attr.proc != PROC_ST_FUNCTION
- && !sym->attr.external)
+ Therefore, the left hand side is no longer a varaiable, when it is: */
+ if (sym->attr.flavor == FL_PROCEDURE && sym->attr.proc != PROC_ST_FUNCTION
+ && !sym->attr.external)
{
bool bad_proc;
bad_proc = false;
/* (iii) A module or internal procedure.... */
if ((gfc_current_ns->proc_name->attr.proc == PROC_INTERNAL
- || gfc_current_ns->proc_name->attr.proc == PROC_MODULE)
+ || gfc_current_ns->proc_name->attr.proc == PROC_MODULE)
&& gfc_current_ns->parent
&& (!(gfc_current_ns->parent->proc_name->attr.function
- || gfc_current_ns->parent->proc_name->attr.subroutine)
+ || gfc_current_ns->parent->proc_name->attr.subroutine)
|| gfc_current_ns->parent->proc_name->attr.is_main_program))
{
/* .... that is not a function.... */
&& lvalue->ref->u.ar.type == AR_FULL
&& lvalue->ref->u.ar.as->cp_was_assumed)
{
- gfc_error ("Vector assignment to assumed-size Cray Pointee at %L"
- " is illegal", &lvalue->where);
+ gfc_error ("Vector assignment to assumed-size Cray Pointee at %L "
+ "is illegal", &lvalue->where);
return FAILURE;
}
NULLIFY statement. */
try
-gfc_check_pointer_assign (gfc_expr * lvalue, gfc_expr * rvalue)
+gfc_check_pointer_assign (gfc_expr *lvalue, gfc_expr *rvalue)
{
symbol_attribute attr;
+ gfc_ref *ref;
int is_pure;
+ int pointer, check_intent_in;
if (lvalue->symtree->n.sym->ts.type == BT_UNKNOWN)
{
}
if (lvalue->symtree->n.sym->attr.flavor == FL_PROCEDURE
- && lvalue->symtree->n.sym->attr.use_assoc)
+ && lvalue->symtree->n.sym->attr.use_assoc)
{
gfc_error ("'%s' in the pointer assignment at %L cannot be an "
"l-value since it is a procedure",
return FAILURE;
}
- attr = gfc_variable_attr (lvalue, NULL);
- if (!attr.pointer)
+
+ /* Check INTENT(IN), unless the object itself is the component or
+ sub-component of a pointer. */
+ check_intent_in = 1;
+ pointer = lvalue->symtree->n.sym->attr.pointer;
+
+ for (ref = lvalue->ref; ref; ref = ref->next)
+ {
+ if (pointer)
+ check_intent_in = 0;
+
+ if (ref->type == REF_COMPONENT && ref->u.c.component->pointer)
+ pointer = 1;
+ }
+
+ if (check_intent_in && lvalue->symtree->n.sym->attr.intent == INTENT_IN)
+ {
+ gfc_error ("Cannot assign to INTENT(IN) variable '%s' at %L",
+ lvalue->symtree->n.sym->name, &lvalue->where);
+ return FAILURE;
+ }
+
+ if (!pointer)
{
gfc_error ("Pointer assignment to non-POINTER at %L", &lvalue->where);
return FAILURE;
if (is_pure && gfc_impure_variable (lvalue->symtree->n.sym))
{
- gfc_error ("Bad pointer object in PURE procedure at %L",
- &lvalue->where);
+ gfc_error ("Bad pointer object in PURE procedure at %L", &lvalue->where);
return FAILURE;
}
if (lvalue->rank != rvalue->rank)
{
gfc_error ("Different ranks in pointer assignment at %L",
- &lvalue->where);
+ &lvalue->where);
return FAILURE;
}
return SUCCESS;
if (lvalue->ts.type == BT_CHARACTER
- && lvalue->ts.cl->length && rvalue->ts.cl->length
- && abs (gfc_dep_compare_expr (lvalue->ts.cl->length,
- rvalue->ts.cl->length)) == 1)
+ && lvalue->ts.cl->length && rvalue->ts.cl->length
+ && abs (gfc_dep_compare_expr (lvalue->ts.cl->length,
+ rvalue->ts.cl->length)) == 1)
{
gfc_error ("Different character lengths in pointer "
"assignment at %L", &lvalue->where);
return FAILURE;
}
+ if (attr.protected && attr.use_assoc)
+ {
+ gfc_error ("Pointer assigment target has PROTECTED "
+ "attribute at %L", &rvalue->where);
+ return FAILURE;
+ }
+
return SUCCESS;
}
symbol. Used for initialization assignments. */
try
-gfc_check_assign_symbol (gfc_symbol * sym, gfc_expr * rvalue)
+gfc_check_assign_symbol (gfc_symbol *sym, gfc_expr *rvalue)
{
gfc_expr lvalue;
try r;
lvalue.ts = sym->ts;
if (sym->as)
lvalue.rank = sym->as->rank;
- lvalue.symtree = (gfc_symtree *)gfc_getmem (sizeof (gfc_symtree));
+ lvalue.symtree = (gfc_symtree *) gfc_getmem (sizeof (gfc_symtree));
lvalue.symtree->n.sym = sym;
lvalue.where = sym->declared_at;
for (c = ts->derived->components; c; c = c->next)
{
if ((c->initializer || c->allocatable) && init == NULL)
- init = gfc_get_expr ();
+ init = gfc_get_expr ();
}
if (init == NULL)
for (c = ts->derived->components; c; c = c->next)
{
if (tail == NULL)
- init->value.constructor = tail = gfc_get_constructor ();
+ init->value.constructor = tail = gfc_get_constructor ();
else
- {
- tail->next = gfc_get_constructor ();
- tail = tail->next;
- }
+ {
+ tail->next = gfc_get_constructor ();
+ tail = tail->next;
+ }
if (c->initializer)
- tail->expr = gfc_copy_expr (c->initializer);
+ tail->expr = gfc_copy_expr (c->initializer);
if (c->allocatable)
{
whole array. */
gfc_expr *
-gfc_get_variable_expr (gfc_symtree * var)
+gfc_get_variable_expr (gfc_symtree *var)
{
gfc_expr *e;
/* Traverse expr, marking all EXPR_VARIABLE symbols referenced. */
void
-gfc_expr_set_symbols_referenced (gfc_expr * expr)
+gfc_expr_set_symbols_referenced (gfc_expr *expr)
{
gfc_actual_arglist *arg;
gfc_constructor *c;
case EXPR_FUNCTION:
for (arg = expr->value.function.actual; arg; arg = arg->next)
- gfc_expr_set_symbols_referenced (arg->expr);
+ gfc_expr_set_symbols_referenced (arg->expr);
break;
case EXPR_VARIABLE:
case EXPR_STRUCTURE:
case EXPR_ARRAY:
for (c = expr->value.constructor; c; c = c->next)
- gfc_expr_set_symbols_referenced (c->expr);
+ gfc_expr_set_symbols_referenced (c->expr);
break;
default:
for (ref = expr->ref; ref; ref = ref->next)
switch (ref->type)
- {
- case REF_ARRAY:
- for (i = 0; i < ref->u.ar.dimen; i++)
- {
- gfc_expr_set_symbols_referenced (ref->u.ar.start[i]);
- gfc_expr_set_symbols_referenced (ref->u.ar.end[i]);
- gfc_expr_set_symbols_referenced (ref->u.ar.stride[i]);
- }
- break;
-
- case REF_COMPONENT:
- break;
-
- case REF_SUBSTRING:
- gfc_expr_set_symbols_referenced (ref->u.ss.start);
- gfc_expr_set_symbols_referenced (ref->u.ss.end);
- break;
-
- default:
- gcc_unreachable ();
- break;
- }
+ {
+ case REF_ARRAY:
+ for (i = 0; i < ref->u.ar.dimen; i++)
+ {
+ gfc_expr_set_symbols_referenced (ref->u.ar.start[i]);
+ gfc_expr_set_symbols_referenced (ref->u.ar.end[i]);
+ gfc_expr_set_symbols_referenced (ref->u.ar.stride[i]);
+ }
+ break;
+
+ case REF_COMPONENT:
+ break;
+
+ case REF_SUBSTRING:
+ gfc_expr_set_symbols_referenced (ref->u.ss.start);
+ gfc_expr_set_symbols_referenced (ref->u.ss.end);
+ break;
+
+ default:
+ gcc_unreachable ();
+ break;
+ }
}
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