/* Attribute name introspection. */
static void attr_name(PARROT_INTERP, PMC *nci) {
PMC * unused;
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *self = VTABLE_get_pmc_keyed_int(interp, capture, 0);
STRING *name = REPR(self)->box_funcs->get_str(interp, STABLE(self), OBJECT_BODY(self));
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "S", name);
}
/* Creates a new type with this HOW as its meta-object. */
static void new_type(PARROT_INTERP, PMC *nci) {
PMC * unused;
/* We first create a new HOW instance. */
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *self = VTABLE_get_pmc_keyed_int(interp, capture, 0);
PMC *HOW = REPR(self)->allocate(interp, STABLE(self));
/* See if we have a representation name; if not default to P6opaque. */
STRING *repr_name = VTABLE_exists_keyed_str(interp, capture, repr_str) ?
VTABLE_get_string_keyed_str(interp, capture, repr_str) :
p6opaque_str;
/* Create a new type object of the desired REPR. (Note that we can't
* default to KnowHOWREPR here, since it doesn't know how to actually
* store attributes, it's just for bootstrapping knowhow's. */
REPROps *repr_to_use = REPR_get_by_name(interp, repr_name);
PMC *type_object = repr_to_use->type_object_for(interp, HOW);
/* See if we were given a name; put it into the meta-object if so. */
STRING *name = VTABLE_exists_keyed_str(interp, capture, name_str) ?
VTABLE_get_string_keyed_str(interp, capture, name_str) :
empty_str;
REPR(HOW)->initialize(interp, STABLE(HOW), OBJECT_BODY(HOW));
((KnowHOWREPRInstance *)PMC_data(HOW))->body.name = name;
PARROT_GC_WRITE_BARRIER(interp, HOW);
/* Set .WHO to an empty hash. */
STABLE(type_object)->WHO = Parrot_pmc_new(interp, enum_class_Hash);
PARROT_GC_WRITE_BARRIER(interp, STABLE_PMC(type_object));
/* Put it into capture to act as return value. */
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", type_object);
}
/* Introspects the name. */
static void name(PARROT_INTERP, PMC *nci) {
PMC * unused;
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *self = VTABLE_get_pmc_keyed_int(interp, capture, 0);
STRING *name = ((KnowHOWREPRInstance *)PMC_data(self))->body.name;
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "S", name);
}
/* Introspects the methods. For now just hand back real method table. */
static void methods(PARROT_INTERP, PMC *nci) {
PMC * unused;
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *self = VTABLE_get_pmc_keyed_int(interp, capture, 0);
PMC *meths = ((KnowHOWREPRInstance *)PMC_data(self))->body.methods;
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", meths);
}
/* Introspects the MRO. That's just a list with ourself. */
static void mro(PARROT_INTERP, PMC *nci) {
PMC * unused;
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *obj = VTABLE_get_pmc_keyed_int(interp, capture, 1);
PMC *mro = Parrot_pmc_new(interp, enum_class_ResizablePMCArray);
VTABLE_push_pmc(interp, mro, STABLE(obj)->WHAT);
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", mro);
}
/* Attribute new method. */
static void attr_new(PARROT_INTERP, PMC *nci) {
PMC * unused;
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *type = VTABLE_get_pmc_keyed_int(interp, capture, 0);
STRING *name = VTABLE_get_string_keyed_str(interp, capture, name_str);
PMC *self = REPR(type)->allocate(interp, STABLE(type));
REPR(self)->box_funcs->set_str(interp, STABLE(self), OBJECT_BODY(self), name);
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", self);
}
/* Introspects the parents. Since a KnowHOW doesn't support inheritance,
* just hand back an empty list. */
static void parents(PARROT_INTERP, PMC *nci) {
PMC * unused;
PMC *capture = Parrot_pcc_get_signature(interp, CURRENT_CONTEXT(interp));
PMC *empty = Parrot_pmc_new(interp, enum_class_FixedPMCArray);
UNUSED(nci);
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", empty);
}
/* Composes the meta-object. */
static void compose(PARROT_INTERP, PMC *nci) {
PMC * 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);
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);
}
/* Finds a method. */
static void find_method(PARROT_INTERP, PMC *nci) {
PMC * unused;
/* Get methods table out of meta-object and look up method. */
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;
STRING *name = VTABLE_get_string_keyed_int(interp, capture, 2);
PMC *method = VTABLE_get_pmc_keyed_str(interp, methods, name);
/* Put into capture to act as return value. */
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", method);
}
/* Adds an attribute meta-object to the list. */
static void add_attribute(PARROT_INTERP, PMC *nci) {
PMC * unused;
/* Get attributes list 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 *attrs = ((KnowHOWREPRInstance *)PMC_data(self))->body.attributes;
/* Add meta-attribute to it. */
PMC *meta_attr = VTABLE_get_pmc_keyed_int(interp, capture, 2);
VTABLE_push_pmc(interp, attrs, meta_attr);
unused = Parrot_pcc_build_call_from_c_args(interp, capture, "P", meta_attr);
}
/* 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);
}
/* 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);
}
