/* 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); }