int
blizkost_slurpy_to_stack(BLIZKOST_NEXUS, PMC *positional, PMC *named) {
int num_pos, i, stkdepth;
PMC *iter;
dBNPERL; dBNINTERP; dSP;
stkdepth = 0;
/* Stick on positional arguments. */
num_pos = VTABLE_elements(interp, positional);
for (i = 0; i < num_pos; i++) {
PMC *pos_arg = VTABLE_get_pmc_keyed_int(interp, positional, i);
XPUSHs(blizkost_marshal_arg(nexus, pos_arg));
stkdepth++;
}
/* Stick on named arguments (we unbundle them to a string
* followed by the argument. */
iter = VTABLE_get_iter(interp, named);
while (VTABLE_get_bool(interp, iter)) {
STRING *arg_name = VTABLE_shift_string(interp, iter);
PMC *arg_value = VTABLE_get_pmc_keyed_str(interp, named, arg_name);
char *c_arg_name = Parrot_str_to_cstring(interp, arg_name);
XPUSHs(sv_2mortal(newSVpv(c_arg_name, strlen(c_arg_name))));
XPUSHs(blizkost_marshal_arg(nexus, arg_value));
stkdepth += 2;
}
PUTBACK;
return stkdepth;
}
void
Parrot_oo_extract_methods_from_namespace(PARROT_INTERP, ARGIN(PMC *self), ARGIN(PMC *ns))
{
ASSERT_ARGS(Parrot_oo_extract_methods_from_namespace)
PMC *methods, *vtable_overrides;
/* Pull in methods from the namespace, if any. */
if (PMC_IS_NULL(ns))
return;
/* Import any methods. */
Parrot_pcc_invoke_method_from_c_args(interp, ns, CONST_STRING(interp, "get_associated_methods"), "->P", &methods);
if (!PMC_IS_NULL(methods)) {
PMC * const iter = VTABLE_get_iter(interp, methods);
while (VTABLE_get_bool(interp, iter)) {
STRING * const meth_name = VTABLE_shift_string(interp, iter);
PMC * const meth_sub = VTABLE_get_pmc_keyed_str(interp, methods,
meth_name);
VTABLE_add_method(interp, self, meth_name, meth_sub);
}
}
/* Import any vtables. */
Parrot_pcc_invoke_method_from_c_args(interp, ns, CONST_STRING(interp, "get_associated_vtable_methods"), "->P", &vtable_overrides);
if (!PMC_IS_NULL(vtable_overrides)) {
PMC * const iter = VTABLE_get_iter(interp, vtable_overrides);
while (VTABLE_get_bool(interp, iter)) {
STRING * const vtable_index_str = VTABLE_shift_string(interp, iter);
PMC * const vtable_sub = VTABLE_get_pmc_keyed_str(interp,
vtable_overrides, vtable_index_str);
/* Look up the name of the vtable function from the index. */
const INTVAL vtable_index = Parrot_str_to_int(interp, vtable_index_str);
const char * const meth_c = Parrot_vtable_slot_names[vtable_index];
STRING * const vtable_name = Parrot_str_new(interp, meth_c, 0);
VTABLE_add_vtable_override(interp, self, vtable_name, vtable_sub);
}
}
}
/* 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);
}
}
/* 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);
}
}
/* 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));
}
}
/* 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;
}
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SV *
blizkost_marshal_arg(BLIZKOST_NEXUS, PMC *arg) {
struct sv *result = NULL;
dBNPERL; dBNINTERP;
/* If it's a P5Scalar PMC, then we just fetch the SV from it - trivial
* round-tripping. */
if (VTABLE_isa(interp, arg, CONST_STRING(interp, "P5Scalar"))) {
GETATTR_P5Scalar_sv(interp, arg, result);
}
/* XXX At this point, we should probably wrap it up in a tied Perl 5
* scalar so we can round-trip Parrot objects to. However, that's hard,
* so for now we cheat on a few special cases and just panic otherwise. */
else if (VTABLE_isa(interp, arg, CONST_STRING(interp, "Integer"))) {
result = sv_2mortal(newSViv(VTABLE_get_integer(interp, arg)));
}
else if (VTABLE_isa(interp, arg, CONST_STRING(interp, "Float"))) {
result = sv_2mortal(newSVnv(VTABLE_get_number(interp, arg)));
}
else if (VTABLE_isa(interp, arg, CONST_STRING(interp, "P5Namespace"))) {
STRING *pkg;
char *c_str;
GETATTR_P5Namespace_ns_name(interp, arg, pkg);
c_str = Parrot_str_to_cstring(interp, pkg);
result = sv_2mortal(newSVpv(c_str, strlen(c_str)));
}
else if (VTABLE_isa(interp, arg, CONST_STRING(interp, "String"))) {
char *c_str = Parrot_str_to_cstring(interp, VTABLE_get_string(interp, arg));
result = sv_2mortal(newSVpv(c_str, strlen(c_str)));
}
else if (VTABLE_does(interp, arg, CONST_STRING(interp, "invokable"))) {
CV *wrapper = blizkost_wrap_callable(nexus, arg);
result = sv_2mortal(newRV_inc((SV*)wrapper));
}
else if ( VTABLE_does(interp, arg, CONST_STRING(interp, "array"))) {
PMC *iter;
struct av *array = newAV();
iter = VTABLE_get_iter(interp, arg);
while (VTABLE_get_bool(interp, iter)) {
PMC *item = VTABLE_shift_pmc(interp, iter);
struct sv *marshaled =
blizkost_marshal_arg(nexus, item);
av_push( array, marshaled);
}
result = newRV_inc((SV*)array);
}
else if ( VTABLE_does(interp, arg, CONST_STRING(interp, "hash"))) {
PMC *iter = VTABLE_get_iter(interp, arg);
struct hv *hash = newHV();
INTVAL n = VTABLE_elements(interp, arg);
INTVAL i;
for(i = 0; i < n; i++) {
STRING *s = VTABLE_shift_string(interp, iter);
char *c_str = Parrot_str_to_cstring(interp, s);
struct sv *val = blizkost_marshal_arg(nexus,
VTABLE_get_pmc_keyed_str(interp, arg, s));
hv_store(hash, c_str, strlen(c_str), val, 0);
}
result = newRV_inc((SV*)hash);
}
else {
Parrot_ex_throw_from_c_args(interp, NULL, 1,
"Sorry, we do not support marshaling most things to Perl 5 yet.");
}
return result;
}