diff options
Diffstat (limited to 'gcc/fortran/resolve.c')
| -rw-r--r-- | gcc/fortran/resolve.c | 873 |
1 files changed, 476 insertions, 397 deletions
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c index f5cd588..2c68af2 100644 --- a/gcc/fortran/resolve.c +++ b/gcc/fortran/resolve.c @@ -535,7 +535,7 @@ static void find_arglists (gfc_symbol *sym) { if (sym->attr.if_source == IFSRC_UNKNOWN || sym->ns != gfc_current_ns - || sym->attr.flavor == FL_DERIVED || sym->attr.intrinsic) + || gfc_fl_struct (sym->attr.flavor) || sym->attr.intrinsic) return; resolve_formal_arglist (sym); @@ -1116,6 +1116,7 @@ resolve_contained_functions (gfc_namespace *ns) static bool resolve_fl_derived0 (gfc_symbol *sym); +static bool resolve_fl_struct (gfc_symbol *sym); /* Resolve all of the elements of a structure constructor and make sure that @@ -1132,8 +1133,13 @@ resolve_structure_cons (gfc_expr *expr, int init) t = true; - if (expr->ts.type == BT_DERIVED) - resolve_fl_derived0 (expr->ts.u.derived); + if (expr->ts.type == BT_DERIVED || expr->ts.type == BT_UNION) + { + if (expr->ts.u.derived->attr.flavor == FL_DERIVED) + resolve_fl_derived0 (expr->ts.u.derived); + else + resolve_fl_struct (expr->ts.u.derived); + } cons = gfc_constructor_first (expr->value.constructor); @@ -1561,7 +1567,7 @@ is_illegal_recursion (gfc_symbol* sym, gfc_namespace* context) gfc_namespace* real_context; if (sym->attr.flavor == FL_PROGRAM - || sym->attr.flavor == FL_DERIVED) + || gfc_fl_struct (sym->attr.flavor)) return false; gcc_assert (sym->attr.flavor == FL_PROCEDURE); @@ -2548,7 +2554,7 @@ resolve_generic_f (gfc_expr *expr) generic: if (!intr) for (intr = sym->generic; intr; intr = intr->next) - if (intr->sym->attr.flavor == FL_DERIVED) + if (gfc_fl_struct (intr->sym->attr.flavor)) break; if (sym->ns->parent == NULL) @@ -5715,7 +5721,7 @@ get_declared_from_expr (gfc_ref **class_ref, gfc_ref **new_ref, continue; if ((ref->u.c.component->ts.type == BT_CLASS - || (check_types && ref->u.c.component->ts.type == BT_DERIVED)) + || (check_types && gfc_bt_struct (ref->u.c.component->ts.type))) && ref->u.c.component->attr.flavor != FL_PROCEDURE) { declared = ref->u.c.component->ts.u.derived; @@ -5978,7 +5984,7 @@ resolve_typebound_function (gfc_expr* e) is present. */ ts = expr->ts; declared = ts.u.derived; - c = gfc_find_component (declared, "_vptr", true, true); + c = gfc_find_component (declared, "_vptr", true, true, NULL); if (c->ts.u.derived == NULL) c->ts.u.derived = gfc_find_derived_vtab (declared); @@ -6025,14 +6031,14 @@ resolve_typebound_function (gfc_expr* e) return false; /* Weed out cases of the ultimate component being a derived type. */ - if ((class_ref && class_ref->u.c.component->ts.type == BT_DERIVED) + if ((class_ref && gfc_bt_struct (class_ref->u.c.component->ts.type)) || (!class_ref && st->n.sym->ts.type != BT_CLASS)) { gfc_free_ref_list (new_ref); return resolve_compcall (e, NULL); } - c = gfc_find_component (declared, "_data", true, true); + c = gfc_find_component (declared, "_data", true, true, NULL); declared = c->ts.u.derived; /* Treat the call as if it is a typebound procedure, in order to roll @@ -6111,7 +6117,7 @@ resolve_typebound_subroutine (gfc_code *code) that any delays in resolution are corrected and that the vtab is present. */ declared = expr->ts.u.derived; - c = gfc_find_component (declared, "_vptr", true, true); + c = gfc_find_component (declared, "_vptr", true, true, NULL); if (c->ts.u.derived == NULL) c->ts.u.derived = gfc_find_derived_vtab (declared); @@ -6156,7 +6162,7 @@ resolve_typebound_subroutine (gfc_code *code) get_declared_from_expr (&class_ref, &new_ref, code->expr1, true); /* Weed out cases of the ultimate component being a derived type. */ - if ((class_ref && class_ref->u.c.component->ts.type == BT_DERIVED) + if ((class_ref && gfc_bt_struct (class_ref->u.c.component->ts.type)) || (!class_ref && st->n.sym->ts.type != BT_CLASS)) { gfc_free_ref_list (new_ref); @@ -7140,7 +7146,7 @@ resolve_allocate_expr (gfc_expr *e, gfc_code *code, bool *array_alloc_wo_spec) gfc_typespec ts; gfc_expr *init_e; - if (code->ext.alloc.ts.type == BT_DERIVED) + if (gfc_bt_struct (code->ext.alloc.ts.type)) ts = code->ext.alloc.ts; else ts = e->ts; @@ -7148,7 +7154,7 @@ resolve_allocate_expr (gfc_expr *e, gfc_code *code, bool *array_alloc_wo_spec) if (ts.type == BT_CLASS) ts = ts.u.derived->components->ts; - if (ts.type == BT_DERIVED && (init_e = gfc_default_initializer (&ts))) + if (gfc_bt_struct (ts.type) && (init_e = gfc_default_initializer (&ts))) { gfc_code *init_st = gfc_get_code (EXEC_INIT_ASSIGN); init_st->loc = code->loc; @@ -7282,7 +7288,7 @@ check_symbols: sym = a->expr->symtree->n.sym; /* TODO - check derived type components. */ - if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS) + if (gfc_bt_struct (sym->ts.type) || sym->ts.type == BT_CLASS) continue; if ((ar->start[i] != NULL @@ -8220,7 +8226,7 @@ resolve_assoc_var (gfc_symbol* sym, bool resolve_target) if (!gfc_build_class_symbol (&sym->ts, &attr, &as)) gcc_unreachable (); /* Make sure the _vptr is set. */ - c = gfc_find_component (sym->ts.u.derived, "_vptr", true, true); + c = gfc_find_component (sym->ts.u.derived, "_vptr", true, true, NULL); if (c->ts.u.derived == NULL) c->ts.u.derived = gfc_find_derived_vtab (sym->ts.u.derived); CLASS_DATA (sym)->attr.pointer = 1; @@ -9911,7 +9917,7 @@ nonscalar_typebound_assign (gfc_symbol *derived, int depth) for (c= derived->components; c; c = c->next) { - if ((c->ts.type != BT_DERIVED + if ((!gfc_bt_struct (c->ts.type) || c->attr.pointer || c->attr.allocatable || c->attr.proc_pointer_comp @@ -10051,7 +10057,7 @@ generate_component_assignments (gfc_code **code, gfc_namespace *ns) /* The intrinsic assignment does the right thing for pointers of all kinds and allocatable components. */ - if (comp1->ts.type != BT_DERIVED + if (!gfc_bt_struct (comp1->ts.type) || comp1->attr.pointer || comp1->attr.allocatable || comp1->attr.proc_pointer_comp @@ -11433,7 +11439,7 @@ resolve_fl_variable_derived (gfc_symbol *sym, int no_init_flag) gfc_find_symbol (sym->ts.u.derived->name, sym->ns, 0, &s); if (s && s->attr.generic) s = gfc_find_dt_in_generic (s); - if (s && s->attr.flavor != FL_DERIVED) + if (s && !gfc_fl_struct (s->attr.flavor)) { gfc_error ("The type %qs cannot be host associated at %L " "because it is blocked by an incompatible object " @@ -12733,7 +12739,8 @@ resolve_typebound_procedure (gfc_symtree* stree) } /* Try to find a name collision with an inherited component. */ - if (super_type && gfc_find_component (super_type, stree->name, true, true)) + if (super_type && gfc_find_component (super_type, stree->name, true, true, + NULL)) { gfc_error ("Procedure %qs at %L has the same name as an inherited" " component of %qs", @@ -12881,7 +12888,7 @@ check_defined_assignments (gfc_symbol *derived) for (c = derived->components; c; c = c->next) { - if (c->ts.type != BT_DERIVED + if (!gfc_bt_struct (c->ts.type) || c->attr.pointer || c->attr.allocatable || c->attr.proc_pointer_comp @@ -12907,435 +12914,498 @@ check_defined_assignments (gfc_symbol *derived) } -/* Resolve the components of a derived type. This does not have to wait until - resolution stage, but can be done as soon as the dt declaration has been - parsed. */ +/* Resolve a single component of a derived type or structure. */ static bool -resolve_fl_derived0 (gfc_symbol *sym) +resolve_component (gfc_component *c, gfc_symbol *sym) { - gfc_symbol* super_type; - gfc_component *c; + gfc_symbol *super_type; - if (sym->attr.unlimited_polymorphic) + if (c->attr.artificial) return true; - super_type = gfc_get_derived_super_type (sym); + /* F2008, C442. */ + if ((!sym->attr.is_class || c != sym->components) + && c->attr.codimension + && (!c->attr.allocatable || (c->as && c->as->type != AS_DEFERRED))) + { + gfc_error ("Coarray component %qs at %L must be allocatable with " + "deferred shape", c->name, &c->loc); + return false; + } - /* F2008, C432. */ - if (super_type && sym->attr.coarray_comp && !super_type->attr.coarray_comp) + /* F2008, C443. */ + if (c->attr.codimension && c->ts.type == BT_DERIVED + && c->ts.u.derived->ts.is_iso_c) { - gfc_error ("As extending type %qs at %L has a coarray component, " - "parent type %qs shall also have one", sym->name, - &sym->declared_at, super_type->name); + gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) " + "shall not be a coarray", c->name, &c->loc); return false; } - /* Ensure the extended type gets resolved before we do. */ - if (super_type && !resolve_fl_derived0 (super_type)) - return false; + /* F2008, C444. */ + if (gfc_bt_struct (c->ts.type) && c->ts.u.derived->attr.coarray_comp + && (c->attr.codimension || c->attr.pointer || c->attr.dimension + || c->attr.allocatable)) + { + gfc_error ("Component %qs at %L with coarray component " + "shall be a nonpointer, nonallocatable scalar", + c->name, &c->loc); + return false; + } - /* An ABSTRACT type must be extensible. */ - if (sym->attr.abstract && !gfc_type_is_extensible (sym)) + /* F2008, C448. */ + if (c->attr.contiguous && (!c->attr.dimension || !c->attr.pointer)) { - gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT", - sym->name, &sym->declared_at); + gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but " + "is not an array pointer", c->name, &c->loc); return false; } - c = (sym->attr.is_class) ? sym->components->ts.u.derived->components - : sym->components; + if (c->attr.proc_pointer && c->ts.interface) + { + gfc_symbol *ifc = c->ts.interface; - bool success = true; + if (!sym->attr.vtype && !check_proc_interface (ifc, &c->loc)) + { + c->tb->error = 1; + return false; + } - for ( ; c != NULL; c = c->next) + if (ifc->attr.if_source || ifc->attr.intrinsic) + { + /* Resolve interface and copy attributes. */ + if (ifc->formal && !ifc->formal_ns) + resolve_symbol (ifc); + if (ifc->attr.intrinsic) + gfc_resolve_intrinsic (ifc, &ifc->declared_at); + + if (ifc->result) + { + c->ts = ifc->result->ts; + c->attr.allocatable = ifc->result->attr.allocatable; + c->attr.pointer = ifc->result->attr.pointer; + c->attr.dimension = ifc->result->attr.dimension; + c->as = gfc_copy_array_spec (ifc->result->as); + c->attr.class_ok = ifc->result->attr.class_ok; + } + else + { + c->ts = ifc->ts; + c->attr.allocatable = ifc->attr.allocatable; + c->attr.pointer = ifc->attr.pointer; + c->attr.dimension = ifc->attr.dimension; + c->as = gfc_copy_array_spec (ifc->as); + c->attr.class_ok = ifc->attr.class_ok; + } + c->ts.interface = ifc; + c->attr.function = ifc->attr.function; + c->attr.subroutine = ifc->attr.subroutine; + + c->attr.pure = ifc->attr.pure; + c->attr.elemental = ifc->attr.elemental; + c->attr.recursive = ifc->attr.recursive; + c->attr.always_explicit = ifc->attr.always_explicit; + c->attr.ext_attr |= ifc->attr.ext_attr; + /* Copy char length. */ + if (ifc->ts.type == BT_CHARACTER && ifc->ts.u.cl) + { + gfc_charlen *cl = gfc_new_charlen (sym->ns, ifc->ts.u.cl); + if (cl->length && !cl->resolved + && !gfc_resolve_expr (cl->length)) + { + c->tb->error = 1; + return false; + } + c->ts.u.cl = cl; + } + } + } + else if (c->attr.proc_pointer && c->ts.type == BT_UNKNOWN) { - if (c->attr.artificial) - continue; + /* Since PPCs are not implicitly typed, a PPC without an explicit + interface must be a subroutine. */ + gfc_add_subroutine (&c->attr, c->name, &c->loc); + } - /* F2008, C442. */ - if ((!sym->attr.is_class || c != sym->components) - && c->attr.codimension - && (!c->attr.allocatable || (c->as && c->as->type != AS_DEFERRED))) - { - gfc_error ("Coarray component %qs at %L must be allocatable with " - "deferred shape", c->name, &c->loc); - success = false; - continue; - } + /* Procedure pointer components: Check PASS arg. */ + if (c->attr.proc_pointer && !c->tb->nopass && c->tb->pass_arg_num == 0 + && !sym->attr.vtype) + { + gfc_symbol* me_arg; - /* F2008, C443. */ - if (c->attr.codimension && c->ts.type == BT_DERIVED - && c->ts.u.derived->ts.is_iso_c) - { - gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) " - "shall not be a coarray", c->name, &c->loc); - success = false; - continue; - } + if (c->tb->pass_arg) + { + gfc_formal_arglist* i; - /* F2008, C444. */ - if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.coarray_comp - && (c->attr.codimension || c->attr.pointer || c->attr.dimension - || c->attr.allocatable)) - { - gfc_error ("Component %qs at %L with coarray component " - "shall be a nonpointer, nonallocatable scalar", - c->name, &c->loc); - success = false; - continue; - } + /* If an explicit passing argument name is given, walk the arg-list + and look for it. */ - /* F2008, C448. */ - if (c->attr.contiguous && (!c->attr.dimension || !c->attr.pointer)) - { - gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but " - "is not an array pointer", c->name, &c->loc); - success = false; - continue; - } + me_arg = NULL; + c->tb->pass_arg_num = 1; + for (i = c->ts.interface->formal; i; i = i->next) + { + if (!strcmp (i->sym->name, c->tb->pass_arg)) + { + me_arg = i->sym; + break; + } + c->tb->pass_arg_num++; + } - if (c->attr.proc_pointer && c->ts.interface) - { - gfc_symbol *ifc = c->ts.interface; + if (!me_arg) + { + gfc_error ("Procedure pointer component %qs with PASS(%s) " + "at %L has no argument %qs", c->name, + c->tb->pass_arg, &c->loc, c->tb->pass_arg); + c->tb->error = 1; + return false; + } + } + else + { + /* Otherwise, take the first one; there should in fact be at least + one. */ + c->tb->pass_arg_num = 1; + if (!c->ts.interface->formal) + { + gfc_error ("Procedure pointer component %qs with PASS at %L " + "must have at least one argument", + c->name, &c->loc); + c->tb->error = 1; + return false; + } + me_arg = c->ts.interface->formal->sym; + } - if (!sym->attr.vtype && !check_proc_interface (ifc, &c->loc)) - { - c->tb->error = 1; - success = false; - continue; - } + /* Now check that the argument-type matches. */ + gcc_assert (me_arg); + if ((me_arg->ts.type != BT_DERIVED && me_arg->ts.type != BT_CLASS) + || (me_arg->ts.type == BT_DERIVED && me_arg->ts.u.derived != sym) + || (me_arg->ts.type == BT_CLASS + && CLASS_DATA (me_arg)->ts.u.derived != sym)) + { + gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of" + " the derived type %qs", me_arg->name, c->name, + me_arg->name, &c->loc, sym->name); + c->tb->error = 1; + return false; + } - if (ifc->attr.if_source || ifc->attr.intrinsic) - { - /* Resolve interface and copy attributes. */ - if (ifc->formal && !ifc->formal_ns) - resolve_symbol (ifc); - if (ifc->attr.intrinsic) - gfc_resolve_intrinsic (ifc, &ifc->declared_at); + /* Check for C453. */ + if (me_arg->attr.dimension) + { + gfc_error ("Argument %qs of %qs with PASS(%s) at %L " + "must be scalar", me_arg->name, c->name, me_arg->name, + &c->loc); + c->tb->error = 1; + return false; + } - if (ifc->result) - { - c->ts = ifc->result->ts; - c->attr.allocatable = ifc->result->attr.allocatable; - c->attr.pointer = ifc->result->attr.pointer; - c->attr.dimension = ifc->result->attr.dimension; - c->as = gfc_copy_array_spec (ifc->result->as); - c->attr.class_ok = ifc->result->attr.class_ok; - } - else - { - c->ts = ifc->ts; - c->attr.allocatable = ifc->attr.allocatable; - c->attr.pointer = ifc->attr.pointer; - c->attr.dimension = ifc->attr.dimension; - c->as = gfc_copy_array_spec (ifc->as); - c->attr.class_ok = ifc->attr.class_ok; - } - c->ts.interface = ifc; - c->attr.function = ifc->attr.function; - c->attr.subroutine = ifc->attr.subroutine; - - c->attr.pure = ifc->attr.pure; - c->attr.elemental = ifc->attr.elemental; - c->attr.recursive = ifc->attr.recursive; - c->attr.always_explicit = ifc->attr.always_explicit; - c->attr.ext_attr |= ifc->attr.ext_attr; - /* Copy char length. */ - if (ifc->ts.type == BT_CHARACTER && ifc->ts.u.cl) - { - gfc_charlen *cl = gfc_new_charlen (sym->ns, ifc->ts.u.cl); - if (cl->length && !cl->resolved - && !gfc_resolve_expr (cl->length)) - { - c->tb->error = 1; - success = false; - continue; - } - c->ts.u.cl = cl; - } - } - } - else if (c->attr.proc_pointer && c->ts.type == BT_UNKNOWN) - { - /* Since PPCs are not implicitly typed, a PPC without an explicit - interface must be a subroutine. */ - gfc_add_subroutine (&c->attr, c->name, &c->loc); - } + if (me_arg->attr.pointer) + { + gfc_error ("Argument %qs of %qs with PASS(%s) at %L " + "may not have the POINTER attribute", me_arg->name, + c->name, me_arg->name, &c->loc); + c->tb->error = 1; + return false; + } - /* Procedure pointer components: Check PASS arg. */ - if (c->attr.proc_pointer && !c->tb->nopass && c->tb->pass_arg_num == 0 - && !sym->attr.vtype) - { - gfc_symbol* me_arg; + if (me_arg->attr.allocatable) + { + gfc_error ("Argument %qs of %qs with PASS(%s) at %L " + "may not be ALLOCATABLE", me_arg->name, c->name, + me_arg->name, &c->loc); + c->tb->error = 1; + return false; + } - if (c->tb->pass_arg) - { - gfc_formal_arglist* i; + if (gfc_type_is_extensible (sym) && me_arg->ts.type != BT_CLASS) + { + gfc_error ("Non-polymorphic passed-object dummy argument of %qs" + " at %L", c->name, &c->loc); + return false; + } - /* If an explicit passing argument name is given, walk the arg-list - and look for it. */ + } - me_arg = NULL; - c->tb->pass_arg_num = 1; - for (i = c->ts.interface->formal; i; i = i->next) - { - if (!strcmp (i->sym->name, c->tb->pass_arg)) - { - me_arg = i->sym; - break; - } - c->tb->pass_arg_num++; - } + /* Check type-spec if this is not the parent-type component. */ + if (((sym->attr.is_class + && (!sym->components->ts.u.derived->attr.extension + || c != sym->components->ts.u.derived->components)) + || (!sym->attr.is_class + && (!sym->attr.extension || c != sym->components))) + && !sym->attr.vtype + && !resolve_typespec_used (&c->ts, &c->loc, c->name)) + return false; - if (!me_arg) - { - gfc_error ("Procedure pointer component %qs with PASS(%s) " - "at %L has no argument %qs", c->name, - c->tb->pass_arg, &c->loc, c->tb->pass_arg); - c->tb->error = 1; - success = false; - continue; - } - } - else - { - /* Otherwise, take the first one; there should in fact be at least - one. */ - c->tb->pass_arg_num = 1; - if (!c->ts.interface->formal) - { - gfc_error ("Procedure pointer component %qs with PASS at %L " - "must have at least one argument", - c->name, &c->loc); - c->tb->error = 1; - success = false; - continue; - } - me_arg = c->ts.interface->formal->sym; - } + super_type = gfc_get_derived_super_type (sym); - /* Now check that the argument-type matches. */ - gcc_assert (me_arg); - if ((me_arg->ts.type != BT_DERIVED && me_arg->ts.type != BT_CLASS) - || (me_arg->ts.type == BT_DERIVED && me_arg->ts.u.derived != sym) - || (me_arg->ts.type == BT_CLASS - && CLASS_DATA (me_arg)->ts.u.derived != sym)) - { - gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of" - " the derived type %qs", me_arg->name, c->name, - me_arg->name, &c->loc, sym->name); - c->tb->error = 1; - success = false; - continue; - } + /* If this type is an extension, set the accessibility of the parent + component. */ + if (super_type + && ((sym->attr.is_class + && c == sym->components->ts.u.derived->components) + || (!sym->attr.is_class && c == sym->components)) + && strcmp (super_type->name, c->name) == 0) + c->attr.access = super_type->attr.access; + + /* If this type is an extension, see if this component has the same name + as an inherited type-bound procedure. */ + if (super_type && !sym->attr.is_class + && gfc_find_typebound_proc (super_type, NULL, c->name, true, NULL)) + { + gfc_error ("Component %qs of %qs at %L has the same name as an" + " inherited type-bound procedure", + c->name, sym->name, &c->loc); + return false; + } - /* Check for C453. */ - if (me_arg->attr.dimension) - { - gfc_error ("Argument %qs of %qs with PASS(%s) at %L " - "must be scalar", me_arg->name, c->name, me_arg->name, - &c->loc); - c->tb->error = 1; - success = false; - continue; - } + if (c->ts.type == BT_CHARACTER && !c->attr.proc_pointer + && !c->ts.deferred) + { + if (c->ts.u.cl->length == NULL + || (!resolve_charlen(c->ts.u.cl)) + || !gfc_is_constant_expr (c->ts.u.cl->length)) + { + gfc_error ("Character length of component %qs needs to " + "be a constant specification expression at %L", + c->name, + c->ts.u.cl->length ? &c->ts.u.cl->length->where : &c->loc); + return false; + } + } - if (me_arg->attr.pointer) - { - gfc_error ("Argument %qs of %qs with PASS(%s) at %L " - "may not have the POINTER attribute", me_arg->name, - c->name, me_arg->name, &c->loc); - c->tb->error = 1; - success = false; - continue; - } + if (c->ts.type == BT_CHARACTER && c->ts.deferred + && !c->attr.pointer && !c->attr.allocatable) + { + gfc_error ("Character component %qs of %qs at %L with deferred " + "length must be a POINTER or ALLOCATABLE", + c->name, sym->name, &c->loc); + return false; + } - if (me_arg->attr.allocatable) - { - gfc_error ("Argument %qs of %qs with PASS(%s) at %L " - "may not be ALLOCATABLE", me_arg->name, c->name, - me_arg->name, &c->loc); - c->tb->error = 1; - success = false; - continue; - } + /* Add the hidden deferred length field. */ + if (c->ts.type == BT_CHARACTER && c->ts.deferred && !c->attr.function + && !sym->attr.is_class) + { + char name[GFC_MAX_SYMBOL_LEN+9]; + gfc_component *strlen; + sprintf (name, "_%s_length", c->name); + strlen = gfc_find_component (sym, name, true, true, NULL); + if (strlen == NULL) + { + if (!gfc_add_component (sym, name, &strlen)) + return false; + strlen->ts.type = BT_INTEGER; + strlen->ts.kind = gfc_charlen_int_kind; + strlen->attr.access = ACCESS_PRIVATE; + strlen->attr.artificial = 1; + } + } - if (gfc_type_is_extensible (sym) && me_arg->ts.type != BT_CLASS) - { - gfc_error ("Non-polymorphic passed-object dummy argument of %qs" - " at %L", c->name, &c->loc); - success = false; - continue; - } + if (c->ts.type == BT_DERIVED + && sym->component_access != ACCESS_PRIVATE + && gfc_check_symbol_access (sym) + && !is_sym_host_assoc (c->ts.u.derived, sym->ns) + && !c->ts.u.derived->attr.use_assoc + && !gfc_check_symbol_access (c->ts.u.derived) + && !gfc_notify_std (GFC_STD_F2003, "the component %qs is a " + "PRIVATE type and cannot be a component of " + "%qs, which is PUBLIC at %L", c->name, + sym->name, &sym->declared_at)) + return false; - } + if ((sym->attr.sequence || sym->attr.is_bind_c) && c->ts.type == BT_CLASS) + { + gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) " + "type %s", c->name, &c->loc, sym->name); + return false; + } - /* Check type-spec if this is not the parent-type component. */ - if (((sym->attr.is_class - && (!sym->components->ts.u.derived->attr.extension - || c != sym->components->ts.u.derived->components)) - || (!sym->attr.is_class - && (!sym->attr.extension || c != sym->components))) - && !sym->attr.vtype - && !resolve_typespec_used (&c->ts, &c->loc, c->name)) - return false; + if (sym->attr.sequence) + { + if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.sequence == 0) + { + gfc_error ("Component %s of SEQUENCE type declared at %L does " + "not have the SEQUENCE attribute", + c->ts.u.derived->name, &sym->declared_at); + return false; + } + } - /* If this type is an extension, set the accessibility of the parent - component. */ - if (super_type - && ((sym->attr.is_class - && c == sym->components->ts.u.derived->components) - || (!sym->attr.is_class && c == sym->components)) - && strcmp (super_type->name, c->name) == 0) - c->attr.access = super_type->attr.access; - - /* If this type is an extension, see if this component has the same name - as an inherited type-bound procedure. */ - if (super_type && !sym->attr.is_class - && gfc_find_typebound_proc (super_type, NULL, c->name, true, NULL)) - { - gfc_error ("Component %qs of %qs at %L has the same name as an" - " inherited type-bound procedure", - c->name, sym->name, &c->loc); - return false; - } + if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.generic) + c->ts.u.derived = gfc_find_dt_in_generic (c->ts.u.derived); + else if (c->ts.type == BT_CLASS && c->attr.class_ok + && CLASS_DATA (c)->ts.u.derived->attr.generic) + CLASS_DATA (c)->ts.u.derived + = gfc_find_dt_in_generic (CLASS_DATA (c)->ts.u.derived); - if (c->ts.type == BT_CHARACTER && !c->attr.proc_pointer - && !c->ts.deferred) - { - if (c->ts.u.cl->length == NULL - || (!resolve_charlen(c->ts.u.cl)) - || !gfc_is_constant_expr (c->ts.u.cl->length)) - { - gfc_error ("Character length of component %qs needs to " - "be a constant specification expression at %L", - c->name, - c->ts.u.cl->length ? &c->ts.u.cl->length->where : &c->loc); - return false; - } - } + if (!sym->attr.is_class && c->ts.type == BT_DERIVED && !sym->attr.vtype + && c->attr.pointer && c->ts.u.derived->components == NULL + && !c->ts.u.derived->attr.zero_comp) + { + gfc_error ("The pointer component %qs of %qs at %L is a type " + "that has not been declared", c->name, sym->name, + &c->loc); + return false; + } - if (c->ts.type == BT_CHARACTER && c->ts.deferred - && !c->attr.pointer && !c->attr.allocatable) - { - gfc_error ("Character component %qs of %qs at %L with deferred " - "length must be a POINTER or ALLOCATABLE", - c->name, sym->name, &c->loc); - return false; - } + if (c->ts.type == BT_CLASS && c->attr.class_ok + && CLASS_DATA (c)->attr.class_pointer + && CLASS_DATA (c)->ts.u.derived->components == NULL + && !CLASS_DATA (c)->ts.u.derived->attr.zero_comp + && !UNLIMITED_POLY (c)) + { + gfc_error ("The pointer component %qs of %qs at %L is a type " + "that has not been declared", c->name, sym->name, + &c->loc); + return false; + } - /* Add the hidden deferred length field. */ - if (c->ts.type == BT_CHARACTER && c->ts.deferred && !c->attr.function - && !sym->attr.is_class) - { - char name[GFC_MAX_SYMBOL_LEN+9]; - gfc_component *strlen; - sprintf (name, "_%s_length", c->name); - strlen = gfc_find_component (sym, name, true, true); - if (strlen == NULL) - { - if (!gfc_add_component (sym, name, &strlen)) - return false; - strlen->ts.type = BT_INTEGER; - strlen->ts.kind = gfc_charlen_int_kind; - strlen->attr.access = ACCESS_PRIVATE; - strlen->attr.artificial = 1; - } - } + /* C437. */ + if (c->ts.type == BT_CLASS && c->attr.flavor != FL_PROCEDURE + && (!c->attr.class_ok + || !(CLASS_DATA (c)->attr.class_pointer + || CLASS_DATA (c)->attr.allocatable))) + { + gfc_error ("Component %qs with CLASS at %L must be allocatable " + "or pointer", c->name, &c->loc); + /* Prevent a recurrence of the error. */ + c->ts.type = BT_UNKNOWN; + return false; + } - if (c->ts.type == BT_DERIVED - && sym->component_access != ACCESS_PRIVATE - && gfc_check_symbol_access (sym) - && !is_sym_host_assoc (c->ts.u.derived, sym->ns) - && !c->ts.u.derived->attr.use_assoc - && !gfc_check_symbol_access (c->ts.u.derived) - && !gfc_notify_std (GFC_STD_F2003, "the component %qs is a " - "PRIVATE type and cannot be a component of " - "%qs, which is PUBLIC at %L", c->name, - sym->name, &sym->declared_at)) - return false; + /* Ensure that all the derived type components are put on the + derived type list; even in formal namespaces, where derived type + pointer components might not have been declared. */ + if (c->ts.type == BT_DERIVED + && c->ts.u.derived + && c->ts.u.derived->components + && c->attr.pointer + && sym != c->ts.u.derived) + add_dt_to_dt_list (c->ts.u.derived); - if ((sym->attr.sequence || sym->attr.is_bind_c) && c->ts.type == BT_CLASS) - { - gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) " - "type %s", c->name, &c->loc, sym->name); - return false; - } + if (!gfc_resolve_array_spec (c->as, + !(c->attr.pointer || c->attr.proc_pointer + || c->attr.allocatable))) + return false; - if (sym->attr.sequence) - { - if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.sequence == 0) - { - gfc_error ("Component %s of SEQUENCE type declared at %L does " - "not have the SEQUENCE attribute", - c->ts.u.derived->name, &sym->declared_at); - return false; - } - } + if (c->initializer && !sym->attr.vtype + && !gfc_check_assign_symbol (sym, c, c->initializer)) + return false; - if (c->ts.type == BT_DERIVED && c->ts.u.derived->attr.generic) - c->ts.u.derived = gfc_find_dt_in_generic (c->ts.u.derived); - else if (c->ts.type == BT_CLASS && c->attr.class_ok - && CLASS_DATA (c)->ts.u.derived->attr.generic) - CLASS_DATA (c)->ts.u.derived - = gfc_find_dt_in_generic (CLASS_DATA (c)->ts.u.derived); + return true; +} - if (!sym->attr.is_class && c->ts.type == BT_DERIVED && !sym->attr.vtype - && c->attr.pointer && c->ts.u.derived->components == NULL - && !c->ts.u.derived->attr.zero_comp) - { - gfc_error ("The pointer component %qs of %qs at %L is a type " - "that has not been declared", c->name, sym->name, - &c->loc); - return false; - } - if (c->ts.type == BT_CLASS && c->attr.class_ok - && CLASS_DATA (c)->attr.class_pointer - && CLASS_DATA (c)->ts.u.derived->components == NULL - && !CLASS_DATA (c)->ts.u.derived->attr.zero_comp - && !UNLIMITED_POLY (c)) - { - gfc_error ("The pointer component %qs of %qs at %L is a type " - "that has not been declared", c->name, sym->name, - &c->loc); - return false; - } +/* Be nice about the locus for a structure expression - show the locus of the + first non-null sub-expression if we can. */ - /* C437. */ - if (c->ts.type == BT_CLASS && c->attr.flavor != FL_PROCEDURE - && (!c->attr.class_ok - || !(CLASS_DATA (c)->attr.class_pointer - || CLASS_DATA (c)->attr.allocatable))) - { - gfc_error ("Component %qs with CLASS at %L must be allocatable " - "or pointer", c->name, &c->loc); - /* Prevent a recurrence of the error. */ - c->ts.type = BT_UNKNOWN; - return false; - } +static locus * +cons_where (gfc_expr *struct_expr) +{ + gfc_constructor *cons; - /* Ensure that all the derived type components are put on the - derived type list; even in formal namespaces, where derived type - pointer components might not have been declared. */ - if (c->ts.type == BT_DERIVED - && c->ts.u.derived - && c->ts.u.derived->components - && c->attr.pointer - && sym != c->ts.u.derived) - add_dt_to_dt_list (c->ts.u.derived); + gcc_assert (struct_expr && struct_expr->expr_type == EXPR_STRUCTURE); - if (!gfc_resolve_array_spec (c->as, - !(c->attr.pointer || c->attr.proc_pointer - || c->attr.allocatable))) - return false; + cons = gfc_constructor_first (struct_expr->value.constructor); + for (; cons; cons = gfc_constructor_next (cons)) + { + if (cons->expr && cons->expr->expr_type != EXPR_NULL) + return &cons->expr->where; + } - if (c->initializer && !sym->attr.vtype - && !gfc_check_assign_symbol (sym, c, c->initializer)) - return false; + return &struct_expr->where; +} + +/* Resolve the components of a structure type. Much less work than derived + types. */ + +static bool +resolve_fl_struct (gfc_symbol *sym) +{ + gfc_component *c; + gfc_expr *init = NULL; + bool success; + + /* Make sure UNIONs do not have overlapping initializers. */ + if (sym->attr.flavor == FL_UNION) + { + for (c = sym->components; c; c = c->next) + { + if (init && c->initializer) + { + gfc_error ("Conflicting initializers in union at %L and %L", + cons_where (init), cons_where (c->initializer)); + gfc_free_expr (c->initializer); + c->initializer = NULL; + } + if (init == NULL) + init = c->initializer; + } } + success = true; + for (c = sym->components; c; c = c->next) + if (!resolve_component (c, sym)) + success = false; + + if (!success) + return false; + + if (sym->components) + add_dt_to_dt_list (sym); + + return true; +} + + +/* Resolve the components of a derived type. This does not have to wait until + resolution stage, but can be done as soon as the dt declaration has been + parsed. */ + +static bool +resolve_fl_derived0 (gfc_symbol *sym) +{ + gfc_symbol* super_type; + gfc_component *c; + bool success; + + if (sym->attr.unlimited_polymorphic) + return true; + + super_type = gfc_get_derived_super_type (sym); + + /* F2008, C432. */ + if (super_type && sym->attr.coarray_comp && !super_type->attr.coarray_comp) + { + gfc_error ("As extending type %qs at %L has a coarray component, " + "parent type %qs shall also have one", sym->name, + &sym->declared_at, super_type->name); + return false; + } + + /* Ensure the extended type gets resolved before we do. */ + if (super_type && !resolve_fl_derived0 (super_type)) + return false; + + /* An ABSTRACT type must be extensible. */ + if (sym->attr.abstract && !gfc_type_is_extensible (sym)) + { + gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT", + sym->name, &sym->declared_at); + return false; + } + + c = (sym->attr.is_class) ? sym->components->ts.u.derived->components + : sym->components; + + success = true; + for ( ; c != NULL; c = c->next) + if (!resolve_component (c, sym)) + success = false; + if (!success) return false; @@ -13396,8 +13466,8 @@ resolve_fl_derived (gfc_symbol *sym) if (sym->attr.is_class && sym->ts.u.derived == NULL) { /* Fix up incomplete CLASS symbols. */ - gfc_component *data = gfc_find_component (sym, "_data", true, true); - gfc_component *vptr = gfc_find_component (sym, "_vptr", true, true); + gfc_component *data = gfc_find_component (sym, "_data", true, true, NULL); + gfc_component *vptr = gfc_find_component (sym, "_vptr", true, true, NULL); /* Nothing more to do for unlimited polymorphic entities. */ if (data->ts.u.derived->attr.unlimited_polymorphic) @@ -13616,6 +13686,11 @@ resolve_symbol (gfc_symbol *sym) return; sym->resolved = 1; + /* No symbol will ever have union type; only components can be unions. + Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION + (just like derived type declaration symbols have flavor FL_DERIVED). */ + gcc_assert (sym->ts.type != BT_UNION); + if (sym->attr.artificial) return; @@ -13687,6 +13762,10 @@ resolve_symbol (gfc_symbol *sym) if (sym->attr.flavor == FL_DERIVED && !resolve_fl_derived (sym)) return; + else if ((sym->attr.flavor == FL_STRUCT || sym->attr.flavor == FL_UNION) + && !resolve_fl_struct (sym)) + return; + /* Symbols that are module procedures with results (functions) have the types and array specification copied for type checking in procedures that call them, as well as for saving to a module @@ -15030,7 +15109,7 @@ resolve_equivalence_derived (gfc_symbol *derived, gfc_symbol *sym, gfc_expr *e) for (; c ; c = c->next) { - if (c->ts.type == BT_DERIVED + if (gfc_bt_struct (c->ts.type) && (!resolve_equivalence_derived(c->ts.u.derived, sym, e))) return false; |