/* Initializes the representations registry, building up all of the various
* representations. */
void REPR_initialize_registry(PARROT_INTERP) {
PMC *dyn_reg_func;
/* Allocate name to ID map, and anchor it with the GC. */
repr_name_to_id_map = Parrot_pmc_new(interp, enum_class_Hash);
Parrot_pmc_gc_register(interp, repr_name_to_id_map);
/* Add all core representations. */
register_repr(interp, Parrot_str_new_constant(interp, "KnowHOWREPR"),
KnowHOWREPR_initialize(interp));
register_repr(interp, Parrot_str_new_constant(interp, "P6opaque"),
P6opaque_initialize(interp));
register_repr(interp, Parrot_str_new_constant(interp, "P6int"),
P6int_initialize(interp));
register_repr(interp, Parrot_str_new_constant(interp, "P6num"),
P6num_initialize(interp));
register_repr(interp, Parrot_str_new_constant(interp, "P6str"),
P6str_initialize(interp));
register_repr(interp, Parrot_str_new_constant(interp, "HashAttrStore"),
HashAttrStore_initialize(interp));
register_repr(interp, Parrot_str_new_constant(interp, "Uninstantiable"),
Uninstantiable_initialize(interp));
/* Set up object for dynamically registering extra representations. */
dyn_reg_func = Parrot_pmc_new(interp, enum_class_Pointer);
VTABLE_set_pointer(interp, dyn_reg_func, REPR_register_dynamic);
VTABLE_set_pmc_keyed_str(interp, interp->root_namespace,
Parrot_str_new_constant(interp, "_REGISTER_REPR"), dyn_reg_func);
}
/* Binds the given value to the specified attribute. */
static void bind_attribute(PARROT_INTERP, PMC *obj, PMC *class_handle, STRING *name, INTVAL hint, PMC *value) {
HashAttrStoreInstance *instance = (HashAttrStoreInstance *)PMC_data(obj);
if (!instance->store)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"Cannot access attributes in a type object");
VTABLE_set_pmc_keyed_str(interp, instance->store, name, value);
}
/* Binds any type captures a variable has. */
static void
Rakudo_binding_bind_type_captures(PARROT_INTERP, PMC *lexpad, Rakudo_Parameter *param, Rakudo_BindVal value) {
PMC * type_obj = value.type == BIND_VAL_OBJ ?
STABLE(Rakudo_cont_decontainerize(interp, value.val.o))->WHAT :
box_type(value);
PMC * iter = VTABLE_get_iter(interp, param->type_captures);
while (VTABLE_get_bool(interp, iter)) {
STRING *name = VTABLE_shift_string(interp, iter);
VTABLE_set_pmc_keyed_str(interp, lexpad, name, type_obj);
}
}
/* Adds a method. */
static void add_method(PARROT_INTERP, PMC *nci) {
PMC * unused;
/* Get methods table out of meta-object. */
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *self = VTABLE_get_pmc_keyed_int(interp, capture, 0);
PMC *methods = ((KnowHOWREPRInstance *)PMC_data(self))->body.methods;
/* Get name and method to add. */
STRING *name = VTABLE_get_string_keyed_int(interp, capture, 2);
PMC *method = VTABLE_get_pmc_keyed_int(interp, capture, 3);
/* Add it, and return added method as result. */
VTABLE_set_pmc_keyed_str(interp, methods, name, method);
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", method);
}
/* Binds any type captures a variable has. */
static void
Rakudo_binding_bind_type_captures(PARROT_INTERP, PMC *lexpad, llsig_element *sig_info, PMC *value) {
/* Obtain type object. */
PMC * meta_obj = PMCNULL;
PMC * type_obj = PMCNULL;
PMC * iter;
STRING * const HOW = Parrot_str_new(interp, "HOW", 0);
PMC * const how_meth = VTABLE_find_method(interp, value, HOW);
Parrot_ext_call(interp, how_meth, "Pi->P", value, &meta_obj);
type_obj = VTABLE_get_attr_str(interp, meta_obj, Parrot_str_new(interp, "protoobject", 0));
/* Iterate over symbols we need to bind this to, and bind 'em. */
iter = VTABLE_get_iter(interp, sig_info->type_captures);
while (VTABLE_get_bool(interp, iter)) {
STRING *name = VTABLE_shift_string(interp, iter);
VTABLE_set_pmc_keyed_str(interp, lexpad, name, type_obj);
}
}
/* Composes the meta-object. */
static void compose(PARROT_INTERP, PMC *nci) {
PMC *repr_info_hash, *repr_info, *type_info, *attr_list, *attr_iter, *unused;
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *self = VTABLE_get_pmc_keyed_int(interp, capture, 0);
PMC *obj = VTABLE_get_pmc_keyed_int(interp, capture, 1);
UNUSED(nci);
/* Do REPR composition. */
repr_info = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
type_info = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
VTABLE_push_pmc(interp, repr_info, type_info);
VTABLE_push_pmc(interp, type_info, obj);
attr_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
attr_iter = VTABLE_get_iter(interp, ((KnowHOWREPRInstance *)PMC_data(self))->body.attributes);
while (VTABLE_get_bool(interp, attr_iter)) {
PMC *attr = VTABLE_shift_pmc(interp, attr_iter);
PMC *attr_hash = Parrot_pmc_new(interp, enum_class_Hash);;
VTABLE_set_string_keyed_str(interp, attr_hash, name_str,
REPR(attr)->box_funcs->get_str(interp, STABLE(attr), OBJECT_BODY(attr)));
VTABLE_push_pmc(interp, attr_list, attr_hash);
}
VTABLE_push_pmc(interp, type_info, attr_list);
VTABLE_push_pmc(interp, type_info, Parrot_pmc_new(interp, enum_class_ResizablePMCArray));
repr_info_hash = Parrot_pmc_new(interp, enum_class_Hash);
VTABLE_set_pmc_keyed_str(interp, repr_info_hash, attribute_str, repr_info);
REPR(obj)->compose(interp, STABLE(obj), repr_info_hash);
/* Set up method and type caches. */
STABLE(obj)->method_cache = ((KnowHOWREPRInstance *)PMC_data(self))->body.methods;
STABLE(obj)->mode_flags = METHOD_CACHE_AUTHORITATIVE;
STABLE(obj)->type_check_cache_length = 1;
STABLE(obj)->type_check_cache = (PMC **)mem_sys_allocate(sizeof(PMC *));
STABLE(obj)->type_check_cache[0] = obj;
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", obj);
}
/* Takes a signature along with positional and named arguments and binds them
* into the provided lexpad (actually, anything that has a Hash interface will
* do). Returns BIND_RESULT_OK if binding works out, BIND_RESULT_FAIL if there
* is a failure and BIND_RESULT_JUNCTION if the failure was because of a
* Junction being passed (meaning we need to auto-thread). */
INTVAL
Rakudo_binding_bind_llsig(PARROT_INTERP, PMC *lexpad, PMC *llsig,
PMC *capture, INTVAL no_nom_type_check,
STRING **error) {
INTVAL i;
INTVAL bind_fail;
INTVAL cur_pos_arg = 0;
INTVAL num_pos_args = VTABLE_elements(interp, capture);
PMC *named_names = PMCNULL;
llsig_element **elements;
INTVAL num_elements;
PMC *named_to_pos_cache;
/* Lazily allocated array of bindings to positionals of nameds. */
PMC **pos_from_named = NULL;
/* If we do have some named args, we want to make a clone of the hash
* to work on. We'll delete stuff from it as we bind, and what we have
* left over can become the slurpy hash or - if we aren't meant to be
* taking one - tell us we have a problem. */
PMC *named_args_copy = PMCNULL;
/* If we have a |$foo that's followed by slurpies, then we can suppress
* any future arity checks. */
INTVAL suppress_arity_fail = 0;
/* Check that we have a valid signature and pull the bits out of it. */
if (!lls_id)
setup_binder_statics(interp);
if (llsig->vtable->base_type != lls_id)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"Internal Error: Rakudo_binding_bind_llsig passed invalid signature");
GETATTR_P6LowLevelSig_elements(interp, llsig, elements);
GETATTR_P6LowLevelSig_num_elements(interp, llsig, num_elements);
GETATTR_P6LowLevelSig_named_to_pos_cache(interp, llsig, named_to_pos_cache);
/* Build nameds -> position hash for named positional arguments,
* if it was not yet built. */
if (PMC_IS_NULL(named_to_pos_cache)) {
named_to_pos_cache = pmc_new(interp, enum_class_Hash);
PARROT_GC_WRITE_BARRIER(interp, llsig);
SETATTR_P6LowLevelSig_named_to_pos_cache(interp, llsig, named_to_pos_cache);
for (i = 0; i < num_elements; i++) {
/* If we find a named argument, we're done with the positionals. */
if (!PMC_IS_NULL(elements[i]->named_names))
break;
/* Skip slurpies (may be a slurpy block, so can't just break). */
if (elements[i]->flags & SIG_ELEM_SLURPY)
continue;
/* Provided it has a name... */
if (!STRING_IS_NULL(elements[i]->variable_name)) {
/* Strip any sigil, then stick in named to positional array. */
STRING *store = elements[i]->variable_name;
STRING *sigil = Parrot_str_substr(interp, store, 0, 1);
STRING *twigil = Parrot_str_substr(interp, store, 1, 1);
if (Parrot_str_equal(interp, sigil, SCALAR_SIGIL_str)
|| Parrot_str_equal(interp, sigil, ARRAY_SIGIL_str)
|| Parrot_str_equal(interp, sigil, HASH_SIGIL_str))
store = Parrot_str_substr(interp, store, 1,
Parrot_str_byte_length(interp, store));
if (Parrot_str_equal(interp, twigil, BANG_TWIGIL_str))
store = Parrot_str_substr(interp, store, 1,
Parrot_str_byte_length(interp, store));
VTABLE_set_integer_keyed_str(interp, named_to_pos_cache, store, i);
}
}
}
/* If we've got a CallContext, just has an attribute with list of named
* parameter names. Otherwise, it's a Capture and we need to do .hash and
* grab out the keys. */
if (capture->vtable->base_type == enum_class_CallContext
|| VTABLE_isa(interp, capture, CALLCONTEXT_str)) {
named_names = VTABLE_get_attr_str(interp, capture, Parrot_str_new(interp, "named", 0));
}
else if (VTABLE_isa(interp, capture, CAPTURE_str)) {
PMC *meth = VTABLE_find_method(interp, capture, Parrot_str_new(interp, "!PARROT_NAMEDS", 0));
PMC *hash = PMCNULL;
PMC *iter;
Parrot_ext_call(interp, meth, "Pi->P", capture, &hash);
iter = VTABLE_get_iter(interp, hash);
if (VTABLE_get_bool(interp, iter)) {
named_names = pmc_new(interp, enum_class_ResizableStringArray);
while (VTABLE_get_bool(interp, iter))
VTABLE_push_string(interp, named_names, VTABLE_shift_string(interp, iter));
}
}
else {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"Internal Error: Rakudo_binding_bind_llsig passed invalid Capture");
}
/* First, consider named arguments, to see if there are any that we will
* be wanting to bind positionally. */
if (!PMC_IS_NULL(named_names)) {
PMC *iter = VTABLE_get_iter(interp, named_names);
named_args_copy = pmc_new(interp, enum_class_Hash);
while (VTABLE_get_bool(interp, iter)) {
STRING *name = VTABLE_shift_string(interp, iter);
if (VTABLE_exists_keyed_str(interp, named_to_pos_cache, name)) {
/* Found one. We'll stash it away for quick access to bind it
* later. */
INTVAL pos = VTABLE_get_integer_keyed_str(interp, named_to_pos_cache, name);
if (!pos_from_named)
pos_from_named = mem_allocate_n_zeroed_typed(num_elements, PMC *);
pos_from_named[pos] = VTABLE_get_pmc_keyed_str(interp, capture, name);
}
else {
/* Otherwise, we'll enter it into the hash of things to bind
* to nameds. */
VTABLE_set_pmc_keyed_str(interp, named_args_copy, name,
VTABLE_get_pmc_keyed_str(interp, capture, name));
}
}
/* Binds a single argument into the lexpad, after doing any checks that are
* needed. Also handles any type captures. If there is a sub signature, then
* re-enters the binder. Returns one of the BIND_RESULT_* codes. */
static INTVAL
Rakudo_binding_bind_one_param(PARROT_INTERP, PMC *lexpad, PMC *llsig, llsig_element *sig_info,
PMC *value, INTVAL no_nom_type_check, STRING **error) {
/* If we need to do a type check, do one. */
if (!no_nom_type_check) {
/* See if we get a hit in the type cache. */
INTVAL cache_matched = 0;
INTVAL value_type = VTABLE_type(interp, value);
if (value_type != 0) {
INTVAL i;
for (i = 0; i < NOM_TYPE_CACHE_SIZE; i++) {
if (sig_info->nom_type_cache[i] == value_type)
{
cache_matched = 1;
break;
}
}
}
/* If not, do the check. */
if (!cache_matched) {
PMC * const type_obj = sig_info->nominal_type;
PMC * accepts_meth = VTABLE_find_method(interp, type_obj, ACCEPTS);
PMC * result = PMCNULL;
Parrot_ext_call(interp, accepts_meth, "PiP->P", type_obj, value, &result);
if (VTABLE_get_bool(interp, result)) {
/* Cache if possible. */
if (value_type != 0 && value_type != p6r_id && value_type != p6o_id) {
INTVAL i;
for (i = 0; i < NOM_TYPE_CACHE_SIZE; i++) {
if (sig_info->nom_type_cache[i] == 0)
{
sig_info->nom_type_cache[i] = value_type;
PARROT_GC_WRITE_BARRIER(interp, llsig);
break;
}
}
}
}
else {
/* Type check failed. However, for language inter-op, we do some
* extra checks if the type is just Positional, Associative, or
* Callable and the thingy we have matches those enough. */
/* XXX TODO: Implement language interop checks. */
if (error) {
STRING * const perl = PERL_str;
PMC * perl_meth = VTABLE_find_method(interp, type_obj, perl);
PMC * how_meth = VTABLE_find_method(interp, value, HOW);
STRING * expected, * got;
PMC * value_how, * value_type;
Parrot_ext_call(interp, perl_meth, "Pi->S", type_obj, &expected);
Parrot_ext_call(interp, how_meth, "Pi->P", value, &value_how);
value_type = VTABLE_get_attr_str(interp, value_how, SHORTNAME_str);
got = VTABLE_get_string(interp, value_type);
*error = Parrot_sprintf_c(interp, "Nominal type check failed for parameter '%S'; expected %S but got %S instead",
sig_info->variable_name, expected, got);
}
if (VTABLE_isa(interp, value, JUNCTION_str))
return BIND_RESULT_JUNCTION;
else
return BIND_RESULT_FAIL;
}
}
}
/* Do we have any type captures to bind? */
if (!PMC_IS_NULL(sig_info->type_captures))
Rakudo_binding_bind_type_captures(interp, lexpad, sig_info, value);
/* Do a coercion, if one is needed. */
if (!STRING_IS_NULL(sig_info->coerce_to)) {
PMC *coerce_meth = VTABLE_find_method(interp, value, sig_info->coerce_to);
if (!PMC_IS_NULL(coerce_meth)) {
Parrot_ext_call(interp, coerce_meth, "Pi->P", value, &value);
}
else {
/* No coercion method availale; whine and fail to bind. */
if (error) {
PMC * how_meth = VTABLE_find_method(interp, value, HOW);
PMC * value_how, * value_type;
STRING * got;
Parrot_ext_call(interp, how_meth, "Pi->P", value, &value_how);
value_type = VTABLE_get_attr_str(interp, value_how, SHORTNAME_str);
got = VTABLE_get_string(interp, value_type);
*error = Parrot_sprintf_c(interp,
"Unable to coerce value for '%S' from %S to %S; no coercion method defined",
sig_info->variable_name, got, sig_info->coerce_to);
}
return BIND_RESULT_FAIL;
}
}
/* If it's not got attributive binding, we'll go about binding it into the
* lex pad. */
if (!(sig_info->flags & SIG_ELEM_BIND_ATTRIBUTIVE)) {
/* Is it "is rw"? */
if (sig_info->flags & SIG_ELEM_IS_RW) {
/* XXX TODO Check if rw flag is set. */
if (!STRING_IS_NULL(sig_info->variable_name))
VTABLE_set_pmc_keyed_str(interp, lexpad, sig_info->variable_name, value);
}
else if (sig_info->flags & SIG_ELEM_IS_PARCEL) {
/* Just bind the thing as is into the lexpad. */
if (!STRING_IS_NULL(sig_info->variable_name))
VTABLE_set_pmc_keyed_str(interp, lexpad, sig_info->variable_name, value);
}
else if (sig_info->flags & SIG_ELEM_IS_COPY) {
/* Place the value into a new container instead of binding to an existing one */
value = descalarref(interp, value);
if (!STRING_IS_NULL(sig_info->variable_name)) {
PMC *copy, *ref, *store_meth;
if (sig_info->flags & SIG_ELEM_ARRAY_SIGIL) {
copy = Rakudo_binding_create_positional(interp, PMCNULL, ARRAY_str);
store_meth = VTABLE_find_method(interp, copy, STORE_str);
Parrot_ext_call(interp, store_meth, "PiP", copy, value);
}
else if (sig_info->flags & SIG_ELEM_HASH_SIGIL) {
copy = Rakudo_binding_create_hash(interp, pmc_new(interp, enum_class_Hash));
store_meth = VTABLE_find_method(interp, copy, STORE_str);
Parrot_ext_call(interp, store_meth, "PiP", copy, value);
}
else {
copy = pmc_new_init(interp, p6s_id, value);
VTABLE_setprop(interp, copy, SCALAR_str, copy);
}
VTABLE_setprop(interp, copy, RW_str, copy);
VTABLE_set_pmc_keyed_str(interp, lexpad, sig_info->variable_name, copy);
}
}
else {
/* Read only. Wrap it into a ObjectRef, mark readonly and bind it. */
if (!STRING_IS_NULL(sig_info->variable_name)) {
PMC *ref = pmc_new_init(interp, or_id, value);
if (!(sig_info->flags & (SIG_ELEM_ARRAY_SIGIL | SIG_ELEM_HASH_SIGIL)))
VTABLE_setprop(interp, ref, SCALAR_str, ref);
VTABLE_set_pmc_keyed_str(interp, lexpad, sig_info->variable_name, ref);
}
}
}
/* Is it the invocant? If so, also have to bind to self lexical. */
if (sig_info->flags & SIG_ELEM_INVOCANT)
VTABLE_set_pmc_keyed_str(interp, lexpad, SELF_str, value);
/* Handle any constraint types (note that they may refer to the parameter by
* name, so we need to have bound it already). */
if (!PMC_IS_NULL(sig_info->post_constraints)) {
PMC * const constraints = sig_info->post_constraints;
INTVAL num_constraints = VTABLE_elements(interp, constraints);
PMC * result = PMCNULL;
INTVAL i;
for (i = 0; i < num_constraints; i++) {
PMC *cons_type = VTABLE_get_pmc_keyed_int(interp, constraints, i);
PMC *accepts_meth = VTABLE_find_method(interp, cons_type, ACCEPTS);
if (VTABLE_isa(interp, cons_type, BLOCK_str))
Parrot_sub_capture_lex(interp,
VTABLE_get_attr_str(interp, cons_type, DO_str));
Parrot_ext_call(interp, accepts_meth, "PiP->P", cons_type, value, &result);
if (!VTABLE_get_bool(interp, result)) {
if (error)
*error = Parrot_sprintf_c(interp, "Constraint type check failed for parameter '%S'",
sig_info->variable_name);
return BIND_RESULT_FAIL;
}
}
}
/* If it's attributive, now we assign it. */
if (sig_info->flags & SIG_ELEM_BIND_ATTRIBUTIVE) {
INTVAL result = Rakudo_binding_assign_attributive(interp, lexpad, sig_info, value, error);
if (result != BIND_RESULT_OK)
return result;
}
/* If it has a sub-signature, bind that. */
if (!PMC_IS_NULL(sig_info->sub_llsig)) {
/* Turn value into a capture, unless we already have one. */
PMC *capture = PMCNULL;
INTVAL result;
if (sig_info->flags & SIG_ELEM_IS_CAPTURE) {
capture = value;
}
else {
PMC *meth = VTABLE_find_method(interp, value, Parrot_str_new(interp, "Capture", 0));
if (PMC_IS_NULL(meth)) {
if (error)
*error = Parrot_sprintf_c(interp, "Could not turn argument into capture");
return BIND_RESULT_FAIL;
}
Parrot_ext_call(interp, meth, "Pi->P", value, &capture);
}
/* Recurse into signature binder. */
result = Rakudo_binding_bind_llsig(interp, lexpad, sig_info->sub_llsig,
capture, no_nom_type_check, error);
if (result != BIND_RESULT_OK)
{
if (error) {
/* Note in the error message that we're in a sub-signature. */
*error = Parrot_str_concat(interp, *error,
Parrot_str_new(interp, " in sub-signature", 0));
/* Have we a variable name? */
if (!STRING_IS_NULL(sig_info->variable_name)) {
*error = Parrot_str_concat(interp, *error,
Parrot_str_new(interp, " of parameter ", 0));
*error = Parrot_str_concat(interp, *error, sig_info->variable_name);
}
}
return result;
}
}
/* Binding of this parameter was thus successful - we're done. */
return BIND_RESULT_OK;
}
/* Bootstraps the KnowHOW. This is were things "bottom out" in the meta-model
* so it's a tad loopy. Basically, we create a KnowHOW type object. We then
* create an instance from that and add a bunch of methods to it. Returns the
* bootstrapped object. */
PMC * SixModelObject_bootstrap_knowhow(PARROT_INTERP, PMC *sc) {
/* Create our KnowHOW type object. Note we don't have a HOW just yet, so
* pass in null. */
REPROps *REPR = REPR_get_by_name(interp, Parrot_str_new_constant(interp, "KnowHOWREPR"));
PMC *knowhow_pmc = REPR->type_object_for(interp, PMCNULL);
/* We create a KnowHOW instance that can describe itself. This means
* .HOW.HOW.HOW.HOW etc will always return that, which closes the model
* up. Also pull out its underlying struct. */
PMC *knowhow_how_pmc = REPR->allocate(interp, NULL);
KnowHOWREPRInstance *knowhow_how = (KnowHOWREPRInstance *)PMC_data(knowhow_how_pmc);
/* Need to give the knowhow_how a twiddled STable with a different
* dispatcher, so things bottom out. */
PMC *st_copy = create_stable(interp, REPR, knowhow_how_pmc);
STABLE_STRUCT(st_copy)->WHAT = knowhow_pmc;
STABLE_STRUCT(st_copy)->find_method = bottom_find_method;
knowhow_how->common.stable = st_copy;
/* Add various methods to the KnowHOW's HOW. */
knowhow_how->body.methods = Parrot_pmc_new(interp, enum_class_Hash);
knowhow_how->body.attributes = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "new_type"),
wrap_c(interp, F2DPTR(new_type)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "find_method"),
wrap_c(interp, F2DPTR(find_method)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "add_method"),
wrap_c(interp, F2DPTR(add_method)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "add_attribute"),
wrap_c(interp, F2DPTR(add_attribute)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "compose"),
wrap_c(interp, F2DPTR(compose)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "parents"),
wrap_c(interp, F2DPTR(parents)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "attributes"),
wrap_c(interp, F2DPTR(attributes)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "methods"),
wrap_c(interp, F2DPTR(methods)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "mro"),
wrap_c(interp, F2DPTR(mro)));
VTABLE_set_pmc_keyed_str(interp, knowhow_how->body.methods,
Parrot_str_new_constant(interp, "name"),
wrap_c(interp, F2DPTR(name)));
/* Set name KnowHOW for the KnowHOW's HOW. */
knowhow_how->body.name = Parrot_str_new_constant(interp, "KnowHOW");
/* Set this built up HOW as the KnowHOW's HOW. */
STABLE(knowhow_pmc)->HOW = knowhow_how_pmc;
/* Give it an authoritative method cache. */
STABLE(knowhow_pmc)->method_cache = knowhow_how->body.methods;
STABLE(knowhow_pmc)->mode_flags = METHOD_CACHE_AUTHORITATIVE;
/* Set up some string constants that the methods here use. */
repr_str = Parrot_str_new_constant(interp, "repr");
name_str = Parrot_str_new_constant(interp, "name");
empty_str = Parrot_str_new_constant(interp, "");
p6opaque_str = Parrot_str_new_constant(interp, "P6opaque");
/* Associate the created objects with the intial core serialization
* context. */
VTABLE_set_pmc_keyed_int(interp, sc, 0, knowhow_pmc);
SC_PMC(knowhow_pmc) = sc;
VTABLE_set_pmc_keyed_int(interp, sc, 1, knowhow_how_pmc);
SC_PMC(knowhow_how_pmc) = sc;
STABLE(knowhow_pmc)->sc = sc;
STABLE(knowhow_how_pmc)->sc = sc;
return knowhow_pmc;
}
/* Takes a signature along with positional and named arguments and binds them
* into the provided lexpad (actually, anything that has a Hash interface will
* do). Returns BIND_RESULT_OK if binding works out, BIND_RESULT_FAIL if there
* is a failure and BIND_RESULT_JUNCTION if the failure was because of a
* Junction being passed (meaning we need to auto-thread). */
INTVAL
Rakudo_binding_bind(PARROT_INTERP, PMC *lexpad, PMC *sig_pmc, PMC *capture,
INTVAL no_nom_type_check, STRING **error) {
INTVAL i, num_pos_args;
INTVAL bind_fail = 0;
INTVAL cur_pos_arg = 0;
Rakudo_Signature *sig = (Rakudo_Signature *)PMC_data(sig_pmc);
PMC *params = sig->params;
INTVAL num_params = VTABLE_elements(interp, params);
Rakudo_BindVal cur_bv;
/* If we do have some named args, we want to make a clone of the hash
* to work on. We'll delete stuff from it as we bind, and what we have
* left over can become the slurpy hash or - if we aren't meant to be
* taking one - tell us we have a problem. */
PMC *named_args_copy = PMCNULL;
/* If we have a |$foo that's followed by slurpies, then we can suppress
* any future arity checks. */
INTVAL suppress_arity_fail = 0;
/* If it's a Parrot capture, it may contain natively typed arguments.
* NOTE: This is a really an encapsulation breakage; if Parrot folks
* change stuff and this breaks, it's not Parrot's fault. */
struct Pcc_cell * pc_positionals = NULL;
/* Set up statics. */
if (!smo_id)
setup_binder_statics(interp);
/* If we've got a CallContext, just has an attribute with list of named
* parameter names. Otherwise, it's probably a Perl 6 Capture and we need
* to extract its parts. */
if (capture->vtable->base_type == enum_class_CallContext) {
PMC *named_names = VTABLE_get_attr_str(interp, capture, NAMED_str);
if (!PMC_IS_NULL(named_names)) {
PMC *iter = VTABLE_get_iter(interp, named_names);
named_args_copy = Parrot_pmc_new(interp, enum_class_Hash);
while (VTABLE_get_bool(interp, iter)) {
STRING *name = VTABLE_shift_string(interp, iter);
VTABLE_set_pmc_keyed_str(interp, named_args_copy, name,
VTABLE_get_pmc_keyed_str(interp, capture, name));
}
}
GETATTR_CallContext_positionals(interp, capture, pc_positionals);
}
else if (capture->vtable->base_type == smo_id &&
STABLE(capture)->type_check(interp, capture, Rakudo_types_capture_get())) {
PMC *captype = Rakudo_types_capture_get();
PMC *list_part = VTABLE_get_attr_keyed(interp, capture, captype, LIST_str);
PMC *hash_part = VTABLE_get_attr_keyed(interp, capture, captype, HASH_str);
capture = Rakudo_isnqplist(list_part)
? list_part
: Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
if (hash_part->vtable->base_type == enum_class_Hash) {
PMC *iter = VTABLE_get_iter(interp, hash_part);
named_args_copy = Parrot_pmc_new(interp, enum_class_Hash);
while (VTABLE_get_bool(interp, iter)) {
STRING *arg_copy_name = VTABLE_shift_string(interp, iter);
VTABLE_set_pmc_keyed_str(interp, named_args_copy, arg_copy_name,
VTABLE_get_pmc_keyed_str(interp, hash_part, arg_copy_name));
}
}
}
else {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"Internal Error: Rakudo_binding_bind passed invalid Capture");
}
/* Now we'll walk through the signature and go about binding things. */
num_pos_args = VTABLE_elements(interp, capture);
for (i = 0; i < num_params; i++) {
Rakudo_Parameter *param = (Rakudo_Parameter *)PMC_data(
VTABLE_get_pmc_keyed_int(interp, params, i));
/* Is it looking for us to bind a capture here? */
if (param->flags & SIG_ELEM_IS_CAPTURE) {
/* Capture the arguments from this point forwards into a Capture.
* Of course, if there's no variable name we can (cheaply) do pretty
* much nothing. */
if (STRING_IS_NULL(param->variable_name)) {
bind_fail = BIND_RESULT_OK;
}
else {
PMC *captype = Rakudo_types_capture_get();
PMC *capsnap = REPR(captype)->allocate(interp, STABLE(captype));
PMC *pos_args = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
PMC *named_args = Parrot_pmc_new(interp, enum_class_Hash);
INTVAL k;
VTABLE_set_attr_keyed(interp, capsnap, captype, LIST_str, pos_args);
VTABLE_set_attr_keyed(interp, capsnap, captype, HASH_str, named_args);
for (k = cur_pos_arg; k < num_pos_args; k++) {
cur_bv = get_positional_bind_val(interp, pc_positionals, capture, k);
VTABLE_push_pmc(interp, pos_args, cur_bv.type == BIND_VAL_OBJ ?
cur_bv.val.o :
create_box(interp, cur_bv));
}
if (!PMC_IS_NULL(named_args_copy)) {
PMC *iter = VTABLE_get_iter(interp, named_args_copy);
while (VTABLE_get_bool(interp, iter)) {
STRING *name = VTABLE_shift_string(interp, iter);
VTABLE_set_pmc_keyed_str(interp, named_args, name,
VTABLE_get_pmc_keyed_str(interp, named_args_copy, name));
}
}
cur_bv.type = BIND_VAL_OBJ;
cur_bv.val.o = capsnap;
bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param, cur_bv,
no_nom_type_check, error);
}
if (bind_fail) {
return bind_fail;
}
else if (i + 1 == num_params) {
/* Since a capture acts as "the ultimate slurpy" in a sense, if
* this is the last parameter in the signature we can return
* success right off the bat. */
return BIND_RESULT_OK;
}
else {
Rakudo_Parameter *next_param = (Rakudo_Parameter *)PMC_data(
VTABLE_get_pmc_keyed_int(interp, params, i + 1));
if (next_param->flags & (SIG_ELEM_SLURPY_POS | SIG_ELEM_SLURPY_NAMED))
suppress_arity_fail = 1;
}
}
/* Could it be a named slurpy? */
else if (param->flags & SIG_ELEM_SLURPY_NAMED) {
/* Can cheat a bit if it's the default method %_.
* We give the hash to the lexpad. */
if (param->flags & SIG_ELEM_METHOD_SLURPY_NAMED && lexpad->vtable->base_type == p6l_id) {
SETATTR_Perl6LexPad_default_named_slurpy(interp, lexpad, named_args_copy);
PARROT_GC_WRITE_BARRIER(interp, lexpad);
}
else {
/* We'll either take the current named arguments copy hash which
* will by definition contain all unbound named parameters and use
* that, or just create an empty one. */
PMC *slurpy = PMC_IS_NULL(named_args_copy) ?
Parrot_pmc_new(interp, enum_class_Hash) :
named_args_copy;
cur_bv.type = BIND_VAL_OBJ;
cur_bv.val.o = Rakudo_binding_create_hash(interp, slurpy);
bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param,
cur_bv, no_nom_type_check, error);
if (bind_fail)
return bind_fail;
}
/* Nullify named arguments hash now we've consumed it, to mark all
* is well. */
named_args_copy = PMCNULL;
}
/* Otherwise, maybe it's a positional. */
else if (PMC_IS_NULL(param->named_names)) {
/* Slurpy or LoL-slurpy? */
if (param->flags & (SIG_ELEM_SLURPY_POS | SIG_ELEM_SLURPY_LOL)) {
/* Create Perl 6 array, create RPA of all remaining things, then
* store it. */
PMC *temp = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
while (cur_pos_arg < num_pos_args) {
cur_bv = get_positional_bind_val(interp, pc_positionals, capture, cur_pos_arg);
VTABLE_push_pmc(interp, temp, cur_bv.type == BIND_VAL_OBJ ?
cur_bv.val.o :
create_box(interp, cur_bv));
cur_pos_arg++;
}
cur_bv.type = BIND_VAL_OBJ;
cur_bv.val.o = param->flags & SIG_ELEM_SLURPY_POS ?
Rakudo_binding_create_positional(interp, temp) :
Rakudo_binding_create_lol(interp, temp);
bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param,
cur_bv, no_nom_type_check, error);
if (bind_fail)
return bind_fail;
}
/* Otherwise, a positional. */
else {
/* Do we have a value?. */
if (cur_pos_arg < num_pos_args) {
/* Easy - just bind that. */
cur_bv = get_positional_bind_val(interp, pc_positionals, capture, cur_pos_arg);
bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param,
cur_bv, no_nom_type_check, error);
if (bind_fail)
return bind_fail;
cur_pos_arg++;
}
else {
/* No value. If it's optional, fetch a default and bind that;
* if not, we're screwed. Note that we never nominal type check
* an optional with no value passed. */
if (param->flags & SIG_ELEM_IS_OPTIONAL) {
cur_bv.type = BIND_VAL_OBJ;
cur_bv.val.o = Rakudo_binding_handle_optional(interp, param, lexpad);
bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param,
cur_bv, 0, error);
if (bind_fail)
return bind_fail;
}
else {
if (error)
*error = Rakudo_binding_arity_fail(interp, params, num_params, num_pos_args, 0);
return BIND_RESULT_FAIL;
}
}
}
}
/* Else, it's a non-slurpy named. */
else {
/* Try and get hold of value. */
PMC *value = PMCNULL;
INTVAL num_names = VTABLE_elements(interp, param->named_names);
INTVAL j;
if (!PMC_IS_NULL(named_args_copy)) {
for (j = 0; j < num_names; j++) {
STRING *name = VTABLE_get_string_keyed_int(interp, param->named_names, j);
value = VTABLE_get_pmc_keyed_str(interp, named_args_copy, name);
if (!PMC_IS_NULL(value)) {
/* Found a value. Delete entry from to-bind args and stop looking. */
VTABLE_delete_keyed_str(interp, named_args_copy, name);
break;
}
}
}
/* Did we get one? */
if (PMC_IS_NULL(value)) {
/* Nope. We'd better hope this param was optional... */
if (param->flags & SIG_ELEM_IS_OPTIONAL) {
cur_bv.type = BIND_VAL_OBJ;
cur_bv.val.o = Rakudo_binding_handle_optional(interp, param, lexpad);
bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param,
cur_bv, 0, error);
}
else if (!suppress_arity_fail) {
if (error)
*error = Parrot_sprintf_c(interp, "Required named parameter '%S' not passed",
VTABLE_get_string_keyed_int(interp, param->named_names, 0));
return BIND_RESULT_FAIL;
}
}
else {
cur_bv.type = BIND_VAL_OBJ;
cur_bv.val.o = value;
bind_fail = Rakudo_binding_bind_one_param(interp, lexpad, sig, param,
cur_bv, 0, error);
}
/* If we got a binding failure, return it. */
if (bind_fail)
return bind_fail;
}
}
/* Do we have any left-over args? */
if (cur_pos_arg < num_pos_args && !suppress_arity_fail) {
/* Oh noes, too many positionals passed. */
if (error)
*error = Rakudo_binding_arity_fail(interp, params, num_params, num_pos_args, 1);
return BIND_RESULT_FAIL;
}
if (!PMC_IS_NULL(named_args_copy) && VTABLE_elements(interp, named_args_copy)) {
/* Oh noes, unexpected named args. */
if (error) {
INTVAL num_extra = VTABLE_elements(interp, named_args_copy);
PMC *iter = VTABLE_get_iter(interp, named_args_copy);
if (num_extra == 1) {
*error = Parrot_sprintf_c(interp, "Unexpected named parameter '%S' passed",
VTABLE_shift_string(interp, iter));
}
else {
INTVAL first = 1;
STRING *comma = Parrot_str_new(interp, ", ", 0);
*error = Parrot_sprintf_c(interp, "%d unexpected named parameters passed (", num_extra);
while (VTABLE_get_bool(interp, iter)) {
STRING *name = VTABLE_shift_string(interp, iter);
if (!first)
*error = Parrot_str_concat(interp, *error, comma);
else
first = 0;
*error = Parrot_str_concat(interp, *error, name);
}
*error = Parrot_str_concat(interp, *error, Parrot_str_new(interp, ")", 0));
}
}
return BIND_RESULT_FAIL;
}
/* If we get here, we're done. */
return BIND_RESULT_OK;
}
/* Binds a single argument into the lexpad, after doing any checks that are
* needed. Also handles any type captures. If there is a sub signature, then
* re-enters the binder. Returns one of the BIND_RESULT_* codes. */
static INTVAL
Rakudo_binding_bind_one_param(PARROT_INTERP, PMC *lexpad, Rakudo_Signature *signature, Rakudo_Parameter *param,
Rakudo_BindVal orig_bv, INTVAL no_nom_type_check, STRING **error) {
PMC *decont_value = NULL;
INTVAL desired_native;
Rakudo_BindVal bv;
/* Check if boxed/unboxed expections are met. */
desired_native = param->flags & SIG_ELEM_NATIVE_VALUE;
if (desired_native == 0 && orig_bv.type == BIND_VAL_OBJ ||
desired_native == SIG_ELEM_NATIVE_INT_VALUE && orig_bv.type == BIND_VAL_INT ||
desired_native == SIG_ELEM_NATIVE_NUM_VALUE && orig_bv.type == BIND_VAL_NUM ||
desired_native == SIG_ELEM_NATIVE_STR_VALUE && orig_bv.type == BIND_VAL_STR)
{
/* We have what we want. */
bv = orig_bv;
}
else if (desired_native == 0) {
/* We need to do a boxing operation. */
bv.type = BIND_VAL_OBJ;
bv.val.o = create_box(interp, orig_bv);
}
else {
storage_spec spec;
decont_value = Rakudo_cont_decontainerize(interp, orig_bv.val.o);
spec = REPR(decont_value)->get_storage_spec(interp, STABLE(decont_value));
switch (desired_native) {
case SIG_ELEM_NATIVE_INT_VALUE:
if (spec.can_box & STORAGE_SPEC_CAN_BOX_INT) {
bv.type = BIND_VAL_INT;
bv.val.i = REPR(decont_value)->box_funcs->get_int(interp, STABLE(decont_value), OBJECT_BODY(decont_value));
}
else {
if (error)
*error = Parrot_sprintf_c(interp, "Cannot unbox argument to '%S' as a native int",
param->variable_name);
return BIND_RESULT_FAIL;
}
break;
case SIG_ELEM_NATIVE_NUM_VALUE:
if (spec.can_box & STORAGE_SPEC_CAN_BOX_NUM) {
bv.type = BIND_VAL_NUM;
bv.val.n = REPR(decont_value)->box_funcs->get_num(interp, STABLE(decont_value), OBJECT_BODY(decont_value));
}
else {
if (error)
*error = Parrot_sprintf_c(interp, "Cannot unbox argument to '%S' as a native num",
param->variable_name);
return BIND_RESULT_FAIL;
}
break;
case SIG_ELEM_NATIVE_STR_VALUE:
if (spec.can_box & STORAGE_SPEC_CAN_BOX_STR) {
bv.type = BIND_VAL_STR;
bv.val.s = REPR(decont_value)->box_funcs->get_str(interp, STABLE(decont_value), OBJECT_BODY(decont_value));
}
else {
if (error)
*error = Parrot_sprintf_c(interp, "Cannot unbox argument to '%S' as a native str",
param->variable_name);
return BIND_RESULT_FAIL;
}
break;
default:
if (error)
*error = Parrot_sprintf_c(interp, "Cannot unbox argument to '%S' as a native type",
param->variable_name);
return BIND_RESULT_FAIL;
}
decont_value = NULL;
}
/* By this point, we'll either have an object that we might be able to
* bind if it passes the type check, or a native value that needs no
* further checking. */
if (bv.type == BIND_VAL_OBJ) {
/* Ensure the value is a 6model object; if not, marshall it to one. */
if (bv.val.o->vtable->base_type != smo_id) {
bv.val.o = Rakudo_types_parrot_map(interp, bv.val.o);
if (bv.val.o->vtable->base_type != smo_id) {
*error = Parrot_sprintf_c(interp, "Unmarshallable foreign language value passed for parameter '%S'",
param->variable_name);
return BIND_RESULT_FAIL;
}
}
/* We pretty much always need to de-containerized value, so get it
* right off. */
decont_value = Rakudo_cont_decontainerize(interp, bv.val.o);
/* Skip nominal type check if not needed. */
if (!no_nom_type_check) {
PMC *nom_type;
/* Is the nominal type generic and in need of instantiation? (This
* can happen in (::T, T) where we didn't learn about the type until
* during the signature bind). */
if (param->flags & SIG_ELEM_NOMINAL_GENERIC) {
PMC *HOW = STABLE(param->nominal_type)->HOW;
PMC *ig = VTABLE_find_method(interp, HOW, INSTANTIATE_GENERIC_str);
Parrot_ext_call(interp, ig, "PiPP->P", HOW, param->nominal_type,
lexpad, &nom_type);
}
else {
nom_type = param->nominal_type;
}
/* If not, do the check. If the wanted nominal type is Mu, then
* anything goes. */
if (nom_type != Rakudo_types_mu_get() &&
(decont_value->vtable->base_type != smo_id ||
!STABLE(decont_value)->type_check(interp, decont_value, nom_type))) {
/* Type check failed; produce error if needed. */
if (error) {
PMC * got_how = STABLE(decont_value)->HOW;
PMC * exp_how = STABLE(nom_type)->HOW;
PMC * got_name_meth = VTABLE_find_method(interp, got_how, NAME_str);
PMC * exp_name_meth = VTABLE_find_method(interp, exp_how, NAME_str);
STRING * expected, * got;
Parrot_ext_call(interp, got_name_meth, "PiP->S", got_how, bv.val.o, &got);
Parrot_ext_call(interp, exp_name_meth, "PiP->S", exp_how, nom_type, &expected);
*error = Parrot_sprintf_c(interp, "Nominal type check failed for parameter '%S'; expected %S but got %S instead",
param->variable_name, expected, got);
}
/* Report junction failure mode if it's a junction. */
return junc_or_fail(interp, decont_value);
}
/* Also enforce definedness constraints. */
if (param->flags & SIG_ELEM_DEFINEDNES_CHECK) {
INTVAL defined = IS_CONCRETE(decont_value);
if (defined && param->flags & SIG_ELEM_UNDEFINED_ONLY) {
if (error)
*error = Parrot_sprintf_c(interp,
"Parameter '%S' requires a type object, but an object instance was passed",
param->variable_name);
return junc_or_fail(interp, decont_value);
}
if (!defined && param->flags & SIG_ELEM_DEFINED_ONLY) {
if (error)
*error = Parrot_sprintf_c(interp,
"Parameter '%S' requires an instance, but a type object was passed",
param->variable_name);
return junc_or_fail(interp, decont_value);
}
}
}
}
/* Do we have any type captures to bind? */
if (!PMC_IS_NULL(param->type_captures)) {
Rakudo_binding_bind_type_captures(interp, lexpad, param, bv);
}
/* Do a coercion, if one is needed. */
if (!PMC_IS_NULL(param->coerce_type)) {
/* Coercing natives not possible - nothing to call a method on. */
if (bv.type != BIND_VAL_OBJ) {
*error = Parrot_sprintf_c(interp,
"Unable to coerce natively typed parameter '%S'",
param->variable_name);
return BIND_RESULT_FAIL;
}
/* Only coerce if we don't already have the correct type. */
if (!STABLE(decont_value)->type_check(interp, decont_value, param->coerce_type)) {
PMC *coerce_meth = VTABLE_find_method(interp, decont_value, param->coerce_method);
if (!PMC_IS_NULL(coerce_meth)) {
Parrot_ext_call(interp, coerce_meth, "Pi->P", decont_value, &decont_value);
}
else {
/* No coercion method availale; whine and fail to bind. */
if (error) {
PMC * got_how = STABLE(decont_value)->HOW;
PMC * got_name_meth = VTABLE_find_method(interp, got_how, NAME_str);
STRING * got;
Parrot_ext_call(interp, got_name_meth, "PiP->S", got_how, decont_value, &got);
*error = Parrot_sprintf_c(interp,
"Unable to coerce value for '%S' from %S to %S; no coercion method defined",
param->variable_name, got, param->coerce_method);
}
return BIND_RESULT_FAIL;
}
}
}
/* If it's not got attributive binding, we'll go about binding it into the
* lex pad. */
if (!(param->flags & SIG_ELEM_BIND_ATTRIBUTIVE) && !STRING_IS_NULL(param->variable_name)) {
/* Is it native? If so, just go ahead and bind it. */
if (bv.type != BIND_VAL_OBJ) {
switch (bv.type) {
case BIND_VAL_INT:
VTABLE_set_integer_keyed_str(interp, lexpad, param->variable_name, bv.val.i);
break;
case BIND_VAL_NUM:
VTABLE_set_number_keyed_str(interp, lexpad, param->variable_name, bv.val.n);
break;
case BIND_VAL_STR:
VTABLE_set_string_keyed_str(interp, lexpad, param->variable_name, bv.val.s);
break;
}
}
/* Otherwise it's some objecty case. */
else if (param->flags & SIG_ELEM_IS_RW) {
/* XXX TODO Check if rw flag is set; also need to have a
* wrapper container that carries extra constraints. */
VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, bv.val.o);
}
else if (param->flags & SIG_ELEM_IS_PARCEL) {
/* Just bind the thing as is into the lexpad. */
VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, bv.val.o);
}
else {
/* If it's an array, copy means make a new one and store,
* and a normal bind is a straightforward binding plus
* adding a constraint. */
if (param->flags & SIG_ELEM_ARRAY_SIGIL) {
PMC *bindee = decont_value;
if (param->flags & SIG_ELEM_IS_COPY) {
bindee = Rakudo_binding_create_positional(interp,
Parrot_pmc_new(interp, enum_class_ResizablePMCArray));
Rakudo_cont_store(interp, bindee, decont_value, 0, 0);
}
VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, bindee);
}
/* If it's a hash, similar approach to array. */
else if (param->flags & SIG_ELEM_HASH_SIGIL) {
PMC *bindee = decont_value;
if (param->flags & SIG_ELEM_IS_COPY) {
bindee = Rakudo_binding_create_hash(interp,
Parrot_pmc_new(interp, enum_class_Hash));
Rakudo_cont_store(interp, bindee, decont_value, 0, 0);
}
VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, bindee);
}
/* If it's a scalar, we always need to wrap it into a new
* container and store it, for copy or ro case (the rw bit
* in the container descriptor takes care of the rest). */
else {
PMC *new_cont = Rakudo_cont_scalar_from_descriptor(interp, param->container_descriptor);
Rakudo_cont_store(interp, new_cont, decont_value, 0, 0);
VTABLE_set_pmc_keyed_str(interp, lexpad, param->variable_name, new_cont);
}
}
}
/* Is it the invocant? If so, also have to bind to self lexical. */
if (param->flags & SIG_ELEM_INVOCANT)
VTABLE_set_pmc_keyed_str(interp, lexpad, SELF_str, decont_value);
/* Handle any constraint types (note that they may refer to the parameter by
* name, so we need to have bound it already). */
if (!PMC_IS_NULL(param->post_constraints)) {
PMC * code_type = Rakudo_types_code_get();
PMC * const constraints = param->post_constraints;
INTVAL num_constraints = VTABLE_elements(interp, constraints);
INTVAL i;
for (i = 0; i < num_constraints; i++) {
/* Check we meet the constraint. */
PMC *cons_type = VTABLE_get_pmc_keyed_int(interp, constraints, i);
PMC *accepts_meth = VTABLE_find_method(interp, cons_type, ACCEPTS);
PMC *old_ctx = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *cappy = Parrot_pmc_new(interp, enum_class_CallContext);
if (STABLE(cons_type)->type_check(interp, cons_type, code_type))
Parrot_sub_capture_lex(interp,
VTABLE_get_attr_keyed(interp, cons_type, code_type, DO_str));
VTABLE_push_pmc(interp, cappy, cons_type);
switch (bv.type) {
case BIND_VAL_OBJ:
VTABLE_push_pmc(interp, cappy, bv.val.o);
break;
case BIND_VAL_INT:
VTABLE_push_integer(interp, cappy, bv.val.i);
break;
case BIND_VAL_NUM:
VTABLE_push_float(interp, cappy, bv.val.n);
break;
case BIND_VAL_STR:
VTABLE_push_string(interp, cappy, bv.val.s);
break;
}
Parrot_pcc_invoke_from_sig_object(interp, accepts_meth, cappy);
cappy = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
Parrot_pcc_set_signature(interp, CURRENT_CONTEXT(interp), old_ctx);
if (!VTABLE_get_bool(interp, VTABLE_get_pmc_keyed_int(interp, cappy, 0))) {
if (error)
*error = Parrot_sprintf_c(interp, "Constraint type check failed for parameter '%S'",
param->variable_name);
return BIND_RESULT_FAIL;
}
}
}
/* If it's attributive, now we assign it. */
if (param->flags & SIG_ELEM_BIND_ATTRIBUTIVE) {
INTVAL result = Rakudo_binding_assign_attributive(interp, lexpad, param, bv, decont_value, error);
if (result != BIND_RESULT_OK)
return result;
}
/* If it has a sub-signature, bind that. */
if (!PMC_IS_NULL(param->sub_llsig) && bv.type == BIND_VAL_OBJ) {
/* Turn value into a capture, unless we already have one. */
PMC *capture = PMCNULL;
INTVAL result;
if (param->flags & SIG_ELEM_IS_CAPTURE) {
capture = decont_value;
}
else {
PMC *meth = VTABLE_find_method(interp, decont_value, Parrot_str_new(interp, "Capture", 0));
if (PMC_IS_NULL(meth)) {
if (error)
*error = Parrot_sprintf_c(interp, "Could not turn argument into capture");
return BIND_RESULT_FAIL;
}
Parrot_ext_call(interp, meth, "Pi->P", decont_value, &capture);
}
/* Recurse into signature binder. */
result = Rakudo_binding_bind(interp, lexpad, param->sub_llsig,
capture, no_nom_type_check, error);
if (result != BIND_RESULT_OK)
{
if (error) {
/* Note in the error message that we're in a sub-signature. */
*error = Parrot_str_concat(interp, *error,
Parrot_str_new(interp, " in sub-signature", 0));
/* Have we a variable name? */
if (!STRING_IS_NULL(param->variable_name)) {
*error = Parrot_str_concat(interp, *error,
Parrot_str_new(interp, " of parameter ", 0));
*error = Parrot_str_concat(interp, *error, param->variable_name);
}
}
return result;
}
}
/* Binding of this parameter was thus successful - we're done. */
return BIND_RESULT_OK;
}
/* Locates all of the attributes. Puts them onto a flattened, ordered
* list of attributes (populating the passed flat_list). Also builds
* the index mapping for doing named lookups. Note index is not related
* to the storage position. */
static PMC * index_mapping_and_flat_list(PARROT_INTERP, PMC *WHAT, P6opaqueREPRData *repr_data) {
PMC *flat_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
PMC *class_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
PMC *attr_map_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
STRING *attributes_str = Parrot_str_new_constant(interp, "attributes");
STRING *parents_str = Parrot_str_new_constant(interp, "parents");
STRING *name_str = Parrot_str_new_constant(interp, "name");
STRING *mro_str = Parrot_str_new_constant(interp, "mro");
INTVAL current_slot = 0;
INTVAL num_classes, i;
P6opaqueNameMap * result = NULL;
/* Get the MRO. */
PMC *mro = introspection_call(interp, WHAT, STABLE(WHAT)->HOW, mro_str, 0);
INTVAL mro_idx = VTABLE_elements(interp, mro);
/* Walk through the parents list. */
while (mro_idx)
{
/* Get current class in MRO. */
PMC *current_class = decontainerize(interp, VTABLE_get_pmc_keyed_int(interp, mro, --mro_idx));
PMC *HOW = STABLE(current_class)->HOW;
/* Get its local parents. */
PMC *parents = introspection_call(interp, current_class, HOW, parents_str, 1);
INTVAL num_parents = VTABLE_elements(interp, parents);
/* Get attributes and iterate over them. */
PMC *attributes = introspection_call(interp, current_class, HOW, attributes_str, 1);
PMC *attr_map = PMCNULL;
PMC *attr_iter = VTABLE_get_iter(interp, attributes);
while (VTABLE_get_bool(interp, attr_iter)) {
/* Get attribute. */
PMC * attr = VTABLE_shift_pmc(interp, attr_iter);
/* Get its name. */
PMC *name_pmc = accessor_call(interp, attr, name_str);
STRING *name = VTABLE_get_string(interp, name_pmc);
/* Allocate a slot. */
if (PMC_IS_NULL(attr_map))
attr_map = Parrot_pmc_new(interp, enum_class_Hash);
VTABLE_set_pmc_keyed_str(interp, attr_map, name,
Parrot_pmc_new_init_int(interp, enum_class_Integer, current_slot));
current_slot++;
/* Push attr onto the flat list. */
VTABLE_push_pmc(interp, flat_list, attr);
}
/* Add to class list and map list. */
VTABLE_push_pmc(interp, class_list, current_class);
VTABLE_push_pmc(interp, attr_map_list, attr_map);
/* If there's more than one parent, flag that we in an MI
* situation. */
if (num_parents > 1)
repr_data->mi = 1;
}
/* We can now form the name map. */
num_classes = VTABLE_elements(interp, class_list);
result = (P6opaqueNameMap *) mem_sys_allocate_zeroed(sizeof(P6opaqueNameMap) * (1 + num_classes));
for (i = 0; i < num_classes; i++) {
result[i].class_key = VTABLE_get_pmc_keyed_int(interp, class_list, i);
result[i].name_map = VTABLE_get_pmc_keyed_int(interp, attr_map_list, i);
}
repr_data->name_to_index_mapping = result;
return flat_list;
}
/* Locates all of the attributes. Puts them onto a flattened, ordered
* list of attributes (populating the passed flat_list). Also builds
* the index mapping for doing named lookups. Note index is not related
* to the storage position. */
static PMC * index_mapping_and_flat_list(PARROT_INTERP, PMC *mro, CStructREPRData *repr_data) {
PMC *flat_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
PMC *class_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
PMC *attr_map_list = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
STRING *name_str = Parrot_str_new_constant(interp, "name");
INTVAL current_slot = 0;
INTVAL num_classes, i;
CStructNameMap * result = NULL;
/* Walk through the parents list. */
INTVAL mro_idx = VTABLE_elements(interp, mro);
while (mro_idx)
{
/* Get current class in MRO. */
PMC *type_info = VTABLE_get_pmc_keyed_int(interp, mro, --mro_idx);
PMC *current_class = decontainerize(interp, VTABLE_get_pmc_keyed_int(interp, type_info, 0));
/* Get its local parents; make sure we're not doing MI. */
PMC *parents = VTABLE_get_pmc_keyed_int(interp, type_info, 2);
INTVAL num_parents = VTABLE_elements(interp, parents);
if (num_parents <= 1) {
/* Get attributes and iterate over them. */
PMC *attributes = VTABLE_get_pmc_keyed_int(interp, type_info, 1);
PMC *attr_map = PMCNULL;
PMC *attr_iter = VTABLE_get_iter(interp, attributes);
while (VTABLE_get_bool(interp, attr_iter)) {
/* Get attribute. */
PMC * attr = VTABLE_shift_pmc(interp, attr_iter);
/* Get its name. */
PMC *name_pmc = VTABLE_get_pmc_keyed_str(interp, attr, name_str);
STRING *name = VTABLE_get_string(interp, name_pmc);
/* Allocate a slot. */
if (PMC_IS_NULL(attr_map))
attr_map = Parrot_pmc_new(interp, enum_class_Hash);
VTABLE_set_pmc_keyed_str(interp, attr_map, name,
Parrot_pmc_new_init_int(interp, enum_class_Integer, current_slot));
current_slot++;
/* Push attr onto the flat list. */
VTABLE_push_pmc(interp, flat_list, attr);
}
/* Add to class list and map list. */
VTABLE_push_pmc(interp, class_list, current_class);
VTABLE_push_pmc(interp, attr_map_list, attr_map);
}
else {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"CStruct representation does not support multiple inheritance");
}
}
/* We can now form the name map. */
num_classes = VTABLE_elements(interp, class_list);
result = (CStructNameMap *) mem_sys_allocate_zeroed(sizeof(CStructNameMap) * (1 + num_classes));
for (i = 0; i < num_classes; i++) {
result[i].class_key = VTABLE_get_pmc_keyed_int(interp, class_list, i);
result[i].name_map = VTABLE_get_pmc_keyed_int(interp, attr_map_list, i);
}
repr_data->name_to_index_mapping = result;
return flat_list;
}
/* Stashes a serialization context with the specified handle. */
void SC_set_sc(PARROT_INTERP, STRING *handle, PMC *sc) {
if (!scs)
setup_sc_stores(interp);
VTABLE_set_pmc_keyed_str(interp, scs, handle, sc);
}
