sabme ua
mbed I/F binding for mruby
Dependents: mruby_mbed_web mirb_mbed
mbed-mruby
How to use
Class
Diff: src/class.c
- Revision:
- 0:158c61bb030f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/class.c Wed Mar 25 17:36:16 2015 +0000
@@ -0,0 +1,2129 @@
+/*
+** class.c - Class class
+**
+** See Copyright Notice in mruby.h
+*/
+
+#include <ctype.h>
+#include <stdarg.h>
+#include "mruby.h"
+#include "mruby/array.h"
+#include "mruby/class.h"
+#include "mruby/numeric.h"
+#include "mruby/proc.h"
+#include "mruby/string.h"
+#include "mruby/variable.h"
+#include "mruby/error.h"
+#include "mruby/data.h"
+
+KHASH_DEFINE(mt, mrb_sym, struct RProc*, TRUE, kh_int_hash_func, kh_int_hash_equal)
+
+void
+mrb_gc_mark_mt(mrb_state *mrb, struct RClass *c)
+{
+ khiter_t k;
+ khash_t(mt) *h = c->mt;
+
+ if (!h) return;
+ for (k = kh_begin(h); k != kh_end(h); k++) {
+ if (kh_exist(h, k)) {
+ struct RProc *m = kh_value(h, k);
+ if (m) {
+ mrb_gc_mark(mrb, (struct RBasic*)m);
+ }
+ }
+ }
+}
+
+size_t
+mrb_gc_mark_mt_size(mrb_state *mrb, struct RClass *c)
+{
+ khash_t(mt) *h = c->mt;
+
+ if (!h) return 0;
+ return kh_size(h);
+}
+
+void
+mrb_gc_free_mt(mrb_state *mrb, struct RClass *c)
+{
+ kh_destroy(mt, mrb, c->mt);
+}
+
+static void
+name_class(mrb_state *mrb, struct RClass *c, mrb_sym name)
+{
+ mrb_obj_iv_set(mrb, (struct RObject*)c,
+ mrb_intern_lit(mrb, "__classid__"), mrb_symbol_value(name));
+}
+
+static void
+setup_class(mrb_state *mrb, struct RClass *outer, struct RClass *c, mrb_sym id)
+{
+ name_class(mrb, c, id);
+ mrb_obj_iv_set(mrb, (struct RObject*)outer, id, mrb_obj_value(c));
+ if (outer != mrb->object_class) {
+ mrb_obj_iv_set(mrb, (struct RObject*)c, mrb_intern_lit(mrb, "__outer__"),
+ mrb_obj_value(outer));
+ }
+}
+
+#define make_metaclass(mrb, c) prepare_singleton_class((mrb), (struct RBasic*)(c))
+
+static void
+prepare_singleton_class(mrb_state *mrb, struct RBasic *o)
+{
+ struct RClass *sc, *c;
+
+ if (o->c->tt == MRB_TT_SCLASS) return;
+ sc = (struct RClass*)mrb_obj_alloc(mrb, MRB_TT_SCLASS, mrb->class_class);
+ sc->mt = 0;
+ sc->iv = 0;
+ if (o->tt == MRB_TT_CLASS) {
+ c = (struct RClass*)o;
+ if (!c->super) {
+ sc->super = mrb->class_class;
+ }
+ else {
+ sc->super = c->super->c;
+ }
+ }
+ else if (o->tt == MRB_TT_SCLASS) {
+ c = (struct RClass*)o;
+ while (c->super->tt == MRB_TT_ICLASS)
+ c = c->super;
+ make_metaclass(mrb, c->super);
+ sc->super = c->super->c;
+ }
+ else {
+ sc->super = o->c;
+ }
+ o->c = sc;
+ mrb_field_write_barrier(mrb, (struct RBasic*)o, (struct RBasic*)sc);
+ mrb_field_write_barrier(mrb, (struct RBasic*)sc, (struct RBasic*)o);
+ mrb_obj_iv_set(mrb, (struct RObject*)sc, mrb_intern_lit(mrb, "__attached__"), mrb_obj_value(o));
+}
+
+static struct RClass *
+class_from_sym(mrb_state *mrb, struct RClass *klass, mrb_sym id)
+{
+ mrb_value c = mrb_const_get(mrb, mrb_obj_value(klass), id);
+
+ mrb_check_type(mrb, c, MRB_TT_CLASS);
+ return mrb_class_ptr(c);
+}
+
+static struct RClass *
+module_from_sym(mrb_state *mrb, struct RClass *klass, mrb_sym id)
+{
+ mrb_value c = mrb_const_get(mrb, mrb_obj_value(klass), id);
+
+ mrb_check_type(mrb, c, MRB_TT_MODULE);
+ return mrb_class_ptr(c);
+}
+
+MRB_API struct RClass*
+mrb_class_outer_module(mrb_state *mrb, struct RClass *c)
+{
+ mrb_value outer;
+
+ outer = mrb_obj_iv_get(mrb, (struct RObject*)c, mrb_intern_lit(mrb, "__outer__"));
+ if (mrb_nil_p(outer)) return NULL;
+ return mrb_class_ptr(outer);
+}
+
+static struct RClass*
+define_module(mrb_state *mrb, mrb_sym name, struct RClass *outer)
+{
+ struct RClass *m;
+
+ if (mrb_const_defined_at(mrb, mrb_obj_value(outer), name)) {
+ return module_from_sym(mrb, outer, name);
+ }
+ m = mrb_module_new(mrb);
+ setup_class(mrb, outer, m, name);
+
+ return m;
+}
+
+MRB_API struct RClass*
+mrb_define_module_id(mrb_state *mrb, mrb_sym name)
+{
+ return define_module(mrb, name, mrb->object_class);
+}
+
+MRB_API struct RClass*
+mrb_define_module(mrb_state *mrb, const char *name)
+{
+ return define_module(mrb, mrb_intern_cstr(mrb, name), mrb->object_class);
+}
+
+MRB_API struct RClass*
+mrb_vm_define_module(mrb_state *mrb, mrb_value outer, mrb_sym id)
+{
+ return define_module(mrb, id, mrb_class_ptr(outer));
+}
+
+MRB_API struct RClass*
+mrb_define_module_under(mrb_state *mrb, struct RClass *outer, const char *name)
+{
+ mrb_sym id = mrb_intern_cstr(mrb, name);
+ struct RClass * c = define_module(mrb, id, outer);
+
+ setup_class(mrb, outer, c, id);
+ return c;
+}
+
+static struct RClass*
+define_class(mrb_state *mrb, mrb_sym name, struct RClass *super, struct RClass *outer)
+{
+ struct RClass * c;
+
+ if (mrb_const_defined_at(mrb, mrb_obj_value(outer), name)) {
+ c = class_from_sym(mrb, outer, name);
+ if (super && mrb_class_real(c->super) != super) {
+ mrb_raisef(mrb, E_TYPE_ERROR, "superclass mismatch for Class %S (%S not %S)",
+ mrb_sym2str(mrb, name),
+ mrb_obj_value(c->super), mrb_obj_value(super));
+ }
+ return c;
+ }
+
+ c = mrb_class_new(mrb, super);
+ setup_class(mrb, outer, c, name);
+
+ return c;
+}
+
+MRB_API struct RClass*
+mrb_define_class_id(mrb_state *mrb, mrb_sym name, struct RClass *super)
+{
+ if (!super) {
+ mrb_warn(mrb, "no super class for `%S', Object assumed", mrb_sym2str(mrb, name));
+ }
+ return define_class(mrb, name, super, mrb->object_class);
+}
+
+MRB_API struct RClass*
+mrb_define_class(mrb_state *mrb, const char *name, struct RClass *super)
+{
+ return mrb_define_class_id(mrb, mrb_intern_cstr(mrb, name), super);
+}
+
+static void
+mrb_class_inherited(mrb_state *mrb, struct RClass *super, struct RClass *klass)
+{
+ if (!super)
+ super = mrb->object_class;
+ mrb_funcall(mrb, mrb_obj_value(super), "inherited", 1, mrb_obj_value(klass));
+}
+
+MRB_API struct RClass*
+mrb_vm_define_class(mrb_state *mrb, mrb_value outer, mrb_value super, mrb_sym id)
+{
+ struct RClass *s;
+ struct RClass *c;
+
+ if (!mrb_nil_p(super)) {
+ if (mrb_type(super) != MRB_TT_CLASS) {
+ mrb_raisef(mrb, E_TYPE_ERROR, "superclass must be a Class (%S given)", super);
+ }
+ s = mrb_class_ptr(super);
+ }
+ else {
+ s = 0;
+ }
+ switch (mrb_type(outer)) {
+ case MRB_TT_CLASS:
+ case MRB_TT_SCLASS:
+ case MRB_TT_MODULE:
+ break;
+ default:
+ mrb_raisef(mrb, E_TYPE_ERROR, "%S is not a class/module", outer);
+ break;
+ }
+ c = define_class(mrb, id, s, mrb_class_ptr(outer));
+ mrb_class_inherited(mrb, mrb_class_real(c->super), c);
+
+ return c;
+}
+
+MRB_API mrb_bool
+mrb_class_defined(mrb_state *mrb, const char *name)
+{
+ mrb_value sym = mrb_check_intern_cstr(mrb, name);
+ if (mrb_nil_p(sym)) {
+ return FALSE;
+ }
+ return mrb_const_defined(mrb, mrb_obj_value(mrb->object_class), mrb_symbol(sym));
+}
+
+MRB_API struct RClass *
+mrb_class_get_under(mrb_state *mrb, struct RClass *outer, const char *name)
+{
+ return class_from_sym(mrb, outer, mrb_intern_cstr(mrb, name));
+}
+
+MRB_API struct RClass *
+mrb_class_get(mrb_state *mrb, const char *name)
+{
+ return mrb_class_get_under(mrb, mrb->object_class, name);
+}
+
+MRB_API struct RClass *
+mrb_module_get_under(mrb_state *mrb, struct RClass *outer, const char *name)
+{
+ return module_from_sym(mrb, outer, mrb_intern_cstr(mrb, name));
+}
+
+MRB_API struct RClass *
+mrb_module_get(mrb_state *mrb, const char *name)
+{
+ return mrb_module_get_under(mrb, mrb->object_class, name);
+}
+
+/*!
+ * Defines a class under the namespace of \a outer.
+ * \param outer a class which contains the new class.
+ * \param id name of the new class
+ * \param super a class from which the new class will derive.
+ * NULL means \c Object class.
+ * \return the created class
+ * \throw TypeError if the constant name \a name is already taken but
+ * the constant is not a \c Class.
+ * \throw NameError if the class is already defined but the class can not
+ * be reopened because its superclass is not \a super.
+ * \post top-level constant named \a name refers the returned class.
+ *
+ * \note if a class named \a name is already defined and its superclass is
+ * \a super, the function just returns the defined class.
+ */
+MRB_API struct RClass *
+mrb_define_class_under(mrb_state *mrb, struct RClass *outer, const char *name, struct RClass *super)
+{
+ mrb_sym id = mrb_intern_cstr(mrb, name);
+ struct RClass * c;
+
+#if 0
+ if (!super) {
+ mrb_warn(mrb, "no super class for `%S::%S', Object assumed",
+ mrb_obj_value(outer), mrb_sym2str(mrb, id));
+ }
+#endif
+ c = define_class(mrb, id, super, outer);
+ setup_class(mrb, outer, c, id);
+ return c;
+}
+
+MRB_API void
+mrb_define_method_raw(mrb_state *mrb, struct RClass *c, mrb_sym mid, struct RProc *p)
+{
+ khash_t(mt) *h = c->mt;
+ khiter_t k;
+
+ if (!h) h = c->mt = kh_init(mt, mrb);
+ k = kh_put(mt, mrb, h, mid);
+ kh_value(h, k) = p;
+ if (p) {
+ mrb_field_write_barrier(mrb, (struct RBasic *)c, (struct RBasic *)p);
+ }
+}
+
+MRB_API void
+mrb_define_method_id(mrb_state *mrb, struct RClass *c, mrb_sym mid, mrb_func_t func, mrb_aspec aspec)
+{
+ struct RProc *p;
+ int ai = mrb_gc_arena_save(mrb);
+
+ p = mrb_proc_new_cfunc(mrb, func);
+ p->target_class = c;
+ mrb_define_method_raw(mrb, c, mid, p);
+ mrb_gc_arena_restore(mrb, ai);
+}
+
+MRB_API void
+mrb_define_method(mrb_state *mrb, struct RClass *c, const char *name, mrb_func_t func, mrb_aspec aspec)
+{
+ mrb_define_method_id(mrb, c, mrb_intern_cstr(mrb, name), func, aspec);
+}
+
+MRB_API void
+mrb_define_method_vm(mrb_state *mrb, struct RClass *c, mrb_sym name, mrb_value body)
+{
+ khash_t(mt) *h = c->mt;
+ khiter_t k;
+ struct RProc *p;
+
+ if (!h) h = c->mt = kh_init(mt, mrb);
+ k = kh_put(mt, mrb, h, name);
+ p = mrb_proc_ptr(body);
+ kh_value(h, k) = p;
+ if (p) {
+ mrb_field_write_barrier(mrb, (struct RBasic *)c, (struct RBasic *)p);
+ }
+}
+
+/* a function to raise NotImplementedError with current method name */
+MRB_API void
+mrb_notimplement(mrb_state *mrb)
+{
+ const char *str;
+ mrb_int len;
+ mrb_callinfo *ci = mrb->c->ci;
+
+ if (ci->mid) {
+ str = mrb_sym2name_len(mrb, ci->mid, &len);
+ mrb_raisef(mrb, E_NOTIMP_ERROR,
+ "%S() function is unimplemented on this machine",
+ mrb_str_new_static(mrb, str, (size_t)len));
+ }
+}
+
+/* a function to be replacement of unimplemented method */
+MRB_API mrb_value
+mrb_notimplement_m(mrb_state *mrb, mrb_value self)
+{
+ mrb_notimplement(mrb);
+ /* not reached */
+ return mrb_nil_value();
+}
+
+static mrb_value
+check_type(mrb_state *mrb, mrb_value val, enum mrb_vtype t, const char *c, const char *m)
+{
+ mrb_value tmp;
+
+ tmp = mrb_check_convert_type(mrb, val, t, c, m);
+ if (mrb_nil_p(tmp)) {
+ mrb_raisef(mrb, E_TYPE_ERROR, "expected %S", mrb_str_new_cstr(mrb, c));
+ }
+ return tmp;
+}
+
+static mrb_value
+to_str(mrb_state *mrb, mrb_value val)
+{
+ return check_type(mrb, val, MRB_TT_STRING, "String", "to_str");
+}
+
+static mrb_value
+to_ary(mrb_state *mrb, mrb_value val)
+{
+ return check_type(mrb, val, MRB_TT_ARRAY, "Array", "to_ary");
+}
+
+static mrb_value
+to_hash(mrb_state *mrb, mrb_value val)
+{
+ return check_type(mrb, val, MRB_TT_HASH, "Hash", "to_hash");
+}
+
+static mrb_sym
+to_sym(mrb_state *mrb, mrb_value ss)
+{
+ if (mrb_type(ss) == MRB_TT_SYMBOL) {
+ return mrb_symbol(ss);
+ }
+ else if (mrb_string_p(ss)) {
+ return mrb_intern_str(mrb, to_str(mrb, ss));
+ }
+ else {
+ mrb_value obj = mrb_funcall(mrb, ss, "inspect", 0);
+ mrb_raisef(mrb, E_TYPE_ERROR, "%S is not a symbol", obj);
+ }
+}
+
+/*
+ retrieve arguments from mrb_state.
+
+ mrb_get_args(mrb, format, ...)
+
+ returns number of arguments parsed.
+
+ format specifiers:
+
+ string mruby type C type note
+ ----------------------------------------------------------------------------------------------
+ o: Object [mrb_value]
+ C: class/module [mrb_value]
+ S: String [mrb_value]
+ A: Array [mrb_value]
+ H: Hash [mrb_value]
+ s: String [char*,mrb_int] Receive two arguments.
+ z: String [char*] NUL terminated string.
+ a: Array [mrb_value*,mrb_int] Receive two arguments.
+ f: Float [mrb_float]
+ i: Integer [mrb_int]
+ b: Boolean [mrb_bool]
+ n: Symbol [mrb_sym]
+ d: Data [void*,mrb_data_type const] 2nd argument will be used to check data type so it won't be modified
+ &: Block [mrb_value]
+ *: rest argument [mrb_value*,mrb_int] Receive the rest of the arguments as an array.
+ |: optional Next argument of '|' and later are optional.
+ ?: optional given [mrb_bool] true if preceding argument (optional) is given.
+ */
+MRB_API mrb_int
+mrb_get_args(mrb_state *mrb, const char *format, ...)
+{
+ char c;
+ int i = 0;
+ mrb_value *sp = mrb->c->stack + 1;
+ va_list ap;
+ int argc = mrb->c->ci->argc;
+ mrb_bool opt = FALSE;
+ mrb_bool given = TRUE;
+
+ va_start(ap, format);
+ if (argc < 0) {
+ struct RArray *a = mrb_ary_ptr(mrb->c->stack[1]);
+
+ argc = a->len;
+ sp = a->ptr;
+ }
+ while ((c = *format++)) {
+ switch (c) {
+ case '|': case '*': case '&': case '?':
+ break;
+ default:
+ if (argc <= i) {
+ if (opt) {
+ given = FALSE;
+ }
+ else {
+ mrb_raise(mrb, E_ARGUMENT_ERROR, "wrong number of arguments");
+ }
+ }
+ break;
+ }
+
+ switch (c) {
+ case 'o':
+ {
+ mrb_value *p;
+
+ p = va_arg(ap, mrb_value*);
+ if (i < argc) {
+ *p = *sp++;
+ i++;
+ }
+ }
+ break;
+ case 'C':
+ {
+ mrb_value *p;
+
+ p = va_arg(ap, mrb_value*);
+ if (i < argc) {
+ mrb_value ss;
+
+ ss = *sp++;
+ switch (mrb_type(ss)) {
+ case MRB_TT_CLASS:
+ case MRB_TT_MODULE:
+ case MRB_TT_SCLASS:
+ break;
+ default:
+ mrb_raisef(mrb, E_TYPE_ERROR, "%S is not class/module", ss);
+ break;
+ }
+ *p = ss;
+ i++;
+ }
+ }
+ break;
+ case 'S':
+ {
+ mrb_value *p;
+
+ p = va_arg(ap, mrb_value*);
+ if (i < argc) {
+ *p = to_str(mrb, *sp++);
+ i++;
+ }
+ }
+ break;
+ case 'A':
+ {
+ mrb_value *p;
+
+ p = va_arg(ap, mrb_value*);
+ if (i < argc) {
+ *p = to_ary(mrb, *sp++);
+ i++;
+ }
+ }
+ break;
+ case 'H':
+ {
+ mrb_value *p;
+
+ p = va_arg(ap, mrb_value*);
+ if (i < argc) {
+ *p = to_hash(mrb, *sp++);
+ i++;
+ }
+ }
+ break;
+ case 's':
+ {
+ mrb_value ss;
+ char **ps = 0;
+ mrb_int *pl = 0;
+
+ ps = va_arg(ap, char**);
+ pl = va_arg(ap, mrb_int*);
+ if (i < argc) {
+ ss = to_str(mrb, *sp++);
+ *ps = RSTRING_PTR(ss);
+ *pl = RSTRING_LEN(ss);
+ i++;
+ }
+ }
+ break;
+ case 'z':
+ {
+ mrb_value ss;
+ const char **ps;
+
+ ps = va_arg(ap, const char**);
+ if (i < argc) {
+ ss = to_str(mrb, *sp++);
+ *ps = mrb_string_value_cstr(mrb, &ss);
+ i++;
+ }
+ }
+ break;
+ case 'a':
+ {
+ mrb_value aa;
+ struct RArray *a;
+ mrb_value **pb;
+ mrb_int *pl;
+
+ pb = va_arg(ap, mrb_value**);
+ pl = va_arg(ap, mrb_int*);
+ if (i < argc) {
+ aa = to_ary(mrb, *sp++);
+ a = mrb_ary_ptr(aa);
+ *pb = a->ptr;
+ *pl = a->len;
+ i++;
+ }
+ }
+ break;
+ case 'f':
+ {
+ mrb_float *p;
+
+ p = va_arg(ap, mrb_float*);
+ if (i < argc) {
+ *p = mrb_to_flo(mrb, *sp);
+ sp++;
+ i++;
+ }
+ }
+ break;
+ case 'i':
+ {
+ mrb_int *p;
+
+ p = va_arg(ap, mrb_int*);
+ if (i < argc) {
+ switch (mrb_type(*sp)) {
+ case MRB_TT_FIXNUM:
+ *p = mrb_fixnum(*sp);
+ break;
+ case MRB_TT_FLOAT:
+ {
+ mrb_float f = mrb_float(*sp);
+
+ if (!FIXABLE(f)) {
+ mrb_raise(mrb, E_RANGE_ERROR, "float too big for int");
+ }
+ *p = (mrb_int)f;
+ }
+ break;
+ case MRB_TT_STRING:
+ mrb_raise(mrb, E_TYPE_ERROR, "no implicit conversion of String into Integer");
+ break;
+ default:
+ *p = mrb_fixnum(mrb_Integer(mrb, *sp));
+ break;
+ }
+ sp++;
+ i++;
+ }
+ }
+ break;
+ case 'b':
+ {
+ mrb_bool *boolp = va_arg(ap, mrb_bool*);
+
+ if (i < argc) {
+ mrb_value b = *sp++;
+ *boolp = mrb_test(b);
+ i++;
+ }
+ }
+ break;
+ case 'n':
+ {
+ mrb_sym *symp;
+
+ symp = va_arg(ap, mrb_sym*);
+ if (i < argc) {
+ mrb_value ss;
+
+ ss = *sp++;
+ *symp = to_sym(mrb, ss);
+ i++;
+ }
+ }
+ break;
+ case 'd':
+ {
+ void** datap;
+ struct mrb_data_type const* type;
+
+ datap = va_arg(ap, void**);
+ type = va_arg(ap, struct mrb_data_type const*);
+ if (i < argc) {
+ *datap = mrb_data_get_ptr(mrb, *sp++, type);
+ ++i;
+ }
+ }
+ break;
+
+ case '&':
+ {
+ mrb_value *p, *bp;
+
+ p = va_arg(ap, mrb_value*);
+ if (mrb->c->ci->argc < 0) {
+ bp = mrb->c->stack + 2;
+ }
+ else {
+ bp = mrb->c->stack + mrb->c->ci->argc + 1;
+ }
+ *p = *bp;
+ }
+ break;
+ case '|':
+ opt = TRUE;
+ break;
+ case '?':
+ {
+ mrb_bool *p;
+
+ p = va_arg(ap, mrb_bool*);
+ *p = given;
+ }
+ break;
+
+ case '*':
+ {
+ mrb_value **var;
+ mrb_int *pl;
+
+ var = va_arg(ap, mrb_value**);
+ pl = va_arg(ap, mrb_int*);
+ if (argc > i) {
+ *pl = argc-i;
+ if (*pl > 0) {
+ *var = sp;
+ }
+ i = argc;
+ sp += *pl;
+ }
+ else {
+ *pl = 0;
+ *var = NULL;
+ }
+ }
+ break;
+ default:
+ mrb_raisef(mrb, E_ARGUMENT_ERROR, "invalid argument specifier %S", mrb_str_new(mrb, &c, 1));
+ break;
+ }
+ }
+ if (!c && argc > i) {
+ mrb_raise(mrb, E_ARGUMENT_ERROR, "wrong number of arguments");
+ }
+ va_end(ap);
+ return i;
+}
+
+static struct RClass*
+boot_defclass(mrb_state *mrb, struct RClass *super)
+{
+ struct RClass *c;
+
+ c = (struct RClass*)mrb_obj_alloc(mrb, MRB_TT_CLASS, mrb->class_class);
+ if (super) {
+ c->super = super;
+ mrb_field_write_barrier(mrb, (struct RBasic*)c, (struct RBasic*)super);
+ }
+ else {
+ c->super = mrb->object_class;
+ }
+ c->mt = kh_init(mt, mrb);
+ return c;
+}
+
+MRB_API void
+mrb_include_module(mrb_state *mrb, struct RClass *c, struct RClass *m)
+{
+ struct RClass *ins_pos;
+
+ ins_pos = c;
+ while (m) {
+ struct RClass *p = c, *ic;
+ int superclass_seen = 0;
+
+ if (c->mt && c->mt == m->mt) {
+ mrb_raise(mrb, E_ARGUMENT_ERROR, "cyclic include detected");
+ }
+ while (p) {
+ if (c != p && p->tt == MRB_TT_CLASS) {
+ superclass_seen = 1;
+ }
+ else if (p->mt == m->mt) {
+ if (p->tt == MRB_TT_ICLASS && !superclass_seen) {
+ ins_pos = p;
+ }
+ goto skip;
+ }
+ p = p->super;
+ }
+ ic = (struct RClass*)mrb_obj_alloc(mrb, MRB_TT_ICLASS, mrb->class_class);
+ if (m->tt == MRB_TT_ICLASS) {
+ ic->c = m->c;
+ }
+ else {
+ ic->c = m;
+ }
+ ic->mt = m->mt;
+ ic->iv = m->iv;
+ ic->super = ins_pos->super;
+ ins_pos->super = ic;
+ mrb_field_write_barrier(mrb, (struct RBasic*)ins_pos, (struct RBasic*)ic);
+ ins_pos = ic;
+ skip:
+ m = m->super;
+ }
+}
+
+static mrb_value
+mrb_mod_append_features(mrb_state *mrb, mrb_value mod)
+{
+ mrb_value klass;
+
+ mrb_check_type(mrb, mod, MRB_TT_MODULE);
+ mrb_get_args(mrb, "C", &klass);
+ mrb_include_module(mrb, mrb_class_ptr(klass), mrb_class_ptr(mod));
+ return mod;
+}
+
+static mrb_value
+mrb_mod_include(mrb_state *mrb, mrb_value klass)
+{
+ mrb_value *argv;
+ mrb_int argc, i;
+
+ mrb_get_args(mrb, "*", &argv, &argc);
+ for (i=0; i<argc; i++) {
+ mrb_check_type(mrb, argv[i], MRB_TT_MODULE);
+ }
+ while (argc--) {
+ mrb_funcall(mrb, argv[argc], "append_features", 1, klass);
+ mrb_funcall(mrb, argv[argc], "included", 1, klass);
+ }
+
+ return klass;
+}
+
+/* 15.2.2.4.28 */
+/*
+ * call-seq:
+ * mod.include?(module) -> true or false
+ *
+ * Returns <code>true</code> if <i>module</i> is included in
+ * <i>mod</i> or one of <i>mod</i>'s ancestors.
+ *
+ * module A
+ * end
+ * class B
+ * include A
+ * end
+ * class C < B
+ * end
+ * B.include?(A) #=> true
+ * C.include?(A) #=> true
+ * A.include?(A) #=> false
+ */
+static mrb_value
+mrb_mod_include_p(mrb_state *mrb, mrb_value mod)
+{
+ mrb_value mod2;
+ struct RClass *c = mrb_class_ptr(mod);
+
+ mrb_get_args(mrb, "C", &mod2);
+ mrb_check_type(mrb, mod2, MRB_TT_MODULE);
+
+ while (c) {
+ if (c->tt == MRB_TT_ICLASS) {
+ if (c->c == mrb_class_ptr(mod2)) return mrb_true_value();
+ }
+ c = c->super;
+ }
+ return mrb_false_value();
+}
+
+static mrb_value
+mrb_mod_ancestors(mrb_state *mrb, mrb_value self)
+{
+ mrb_value result;
+ struct RClass *c = mrb_class_ptr(self);
+
+ result = mrb_ary_new(mrb);
+ mrb_ary_push(mrb, result, mrb_obj_value(c));
+ c = c->super;
+ while (c) {
+ if (c->tt == MRB_TT_ICLASS) {
+ mrb_ary_push(mrb, result, mrb_obj_value(c->c));
+ }
+ else if (c->tt != MRB_TT_SCLASS) {
+ mrb_ary_push(mrb, result, mrb_obj_value(c));
+ }
+ c = c->super;
+ }
+
+ return result;
+}
+
+static mrb_value
+mrb_mod_extend_object(mrb_state *mrb, mrb_value mod)
+{
+ mrb_value obj;
+
+ mrb_check_type(mrb, mod, MRB_TT_MODULE);
+ mrb_get_args(mrb, "o", &obj);
+ mrb_include_module(mrb, mrb_class_ptr(mrb_singleton_class(mrb, obj)), mrb_class_ptr(mod));
+ return mod;
+}
+
+static mrb_value
+mrb_mod_included_modules(mrb_state *mrb, mrb_value self)
+{
+ mrb_value result;
+ struct RClass *c = mrb_class_ptr(self);
+
+ result = mrb_ary_new(mrb);
+ while (c) {
+ if (c->tt == MRB_TT_ICLASS) {
+ mrb_ary_push(mrb, result, mrb_obj_value(c->c));
+ }
+ c = c->super;
+ }
+
+ return result;
+}
+
+static mrb_value
+mrb_mod_initialize(mrb_state *mrb, mrb_value mod)
+{
+ mrb_value b;
+
+ mrb_get_args(mrb, "&", &b);
+ if (!mrb_nil_p(b)) {
+ mrb_yield_with_class(mrb, b, 1, &mod, mod, mrb_class_ptr(mod));
+ }
+ return mod;
+}
+
+mrb_value mrb_class_instance_method_list(mrb_state*, mrb_bool, struct RClass*, int);
+
+/* 15.2.2.4.33 */
+/*
+ * call-seq:
+ * mod.instance_methods(include_super=true) -> array
+ *
+ * Returns an array containing the names of the public and protected instance
+ * methods in the receiver. For a module, these are the public and protected methods;
+ * for a class, they are the instance (not singleton) methods. With no
+ * argument, or with an argument that is <code>false</code>, the
+ * instance methods in <i>mod</i> are returned, otherwise the methods
+ * in <i>mod</i> and <i>mod</i>'s superclasses are returned.
+ *
+ * module A
+ * def method1() end
+ * end
+ * class B
+ * def method2() end
+ * end
+ * class C < B
+ * def method3() end
+ * end
+ *
+ * A.instance_methods #=> [:method1]
+ * B.instance_methods(false) #=> [:method2]
+ * C.instance_methods(false) #=> [:method3]
+ * C.instance_methods(true).length #=> 43
+ */
+
+static mrb_value
+mrb_mod_instance_methods(mrb_state *mrb, mrb_value mod)
+{
+ struct RClass *c = mrb_class_ptr(mod);
+ mrb_bool recur = TRUE;
+ mrb_get_args(mrb, "|b", &recur);
+ return mrb_class_instance_method_list(mrb, recur, c, 0);
+}
+
+/* implementation of module_eval/class_eval */
+mrb_value mrb_mod_module_eval(mrb_state*, mrb_value);
+
+static mrb_value
+mrb_mod_dummy_visibility(mrb_state *mrb, mrb_value mod)
+{
+ return mod;
+}
+
+MRB_API mrb_value
+mrb_singleton_class(mrb_state *mrb, mrb_value v)
+{
+ struct RBasic *obj;
+
+ switch (mrb_type(v)) {
+ case MRB_TT_FALSE:
+ if (mrb_nil_p(v))
+ return mrb_obj_value(mrb->nil_class);
+ return mrb_obj_value(mrb->false_class);
+ case MRB_TT_TRUE:
+ return mrb_obj_value(mrb->true_class);
+ case MRB_TT_CPTR:
+ return mrb_obj_value(mrb->object_class);
+ case MRB_TT_SYMBOL:
+ case MRB_TT_FIXNUM:
+ case MRB_TT_FLOAT:
+ mrb_raise(mrb, E_TYPE_ERROR, "can't define singleton");
+ return mrb_nil_value(); /* not reached */
+ default:
+ break;
+ }
+ obj = mrb_basic_ptr(v);
+ prepare_singleton_class(mrb, obj);
+ if (mrb->c && mrb->c->ci && mrb->c->ci->target_class) {
+ mrb_obj_iv_set(mrb, (struct RObject*)obj->c, mrb_intern_lit(mrb, "__outer__"),
+ mrb_obj_value(mrb->c->ci->target_class));
+ }
+ return mrb_obj_value(obj->c);
+}
+
+MRB_API void
+mrb_define_singleton_method(mrb_state *mrb, struct RObject *o, const char *name, mrb_func_t func, mrb_aspec aspec)
+{
+ prepare_singleton_class(mrb, (struct RBasic*)o);
+ mrb_define_method_id(mrb, o->c, mrb_intern_cstr(mrb, name), func, aspec);
+}
+
+MRB_API void
+mrb_define_class_method(mrb_state *mrb, struct RClass *c, const char *name, mrb_func_t func, mrb_aspec aspec)
+{
+ mrb_define_singleton_method(mrb, (struct RObject*)c, name, func, aspec);
+}
+
+MRB_API void
+mrb_define_module_function(mrb_state *mrb, struct RClass *c, const char *name, mrb_func_t func, mrb_aspec aspec)
+{
+ mrb_define_class_method(mrb, c, name, func, aspec);
+ mrb_define_method(mrb, c, name, func, aspec);
+}
+
+MRB_API struct RProc*
+mrb_method_search_vm(mrb_state *mrb, struct RClass **cp, mrb_sym mid)
+{
+ khiter_t k;
+ struct RProc *m;
+ struct RClass *c = *cp;
+
+ while (c) {
+ khash_t(mt) *h = c->mt;
+
+ if (h) {
+ k = kh_get(mt, mrb, h, mid);
+ if (k != kh_end(h)) {
+ m = kh_value(h, k);
+ if (!m) break;
+ *cp = c;
+ return m;
+ }
+ }
+ c = c->super;
+ }
+ return NULL; /* no method */
+}
+
+MRB_API struct RProc*
+mrb_method_search(mrb_state *mrb, struct RClass* c, mrb_sym mid)
+{
+ struct RProc *m;
+
+ m = mrb_method_search_vm(mrb, &c, mid);
+ if (!m) {
+ mrb_value inspect = mrb_funcall(mrb, mrb_obj_value(c), "inspect", 0);
+ if (RSTRING_LEN(inspect) > 64) {
+ inspect = mrb_any_to_s(mrb, mrb_obj_value(c));
+ }
+ mrb_name_error(mrb, mid, "undefined method '%S' for class %S",
+ mrb_sym2str(mrb, mid), inspect);
+ }
+ return m;
+}
+
+static mrb_value
+attr_reader(mrb_state *mrb, mrb_value obj)
+{
+ mrb_value name = mrb_proc_cfunc_env_get(mrb, 0);
+ return mrb_iv_get(mrb, obj, to_sym(mrb, name));
+}
+
+static mrb_value
+mrb_mod_attr_reader(mrb_state *mrb, mrb_value mod)
+{
+ struct RClass *c = mrb_class_ptr(mod);
+ mrb_value *argv;
+ mrb_int argc, i;
+ int ai;
+
+ mrb_get_args(mrb, "*", &argv, &argc);
+ ai = mrb_gc_arena_save(mrb);
+ for (i=0; i<argc; i++) {
+ mrb_value name, str;
+ mrb_sym method, sym;
+
+ method = to_sym(mrb, argv[i]);
+ name = mrb_sym2str(mrb, method);
+ str = mrb_str_buf_new(mrb, RSTRING_LEN(name)+1);
+ mrb_str_cat_lit(mrb, str, "@");
+ mrb_str_cat_str(mrb, str, name);
+ sym = mrb_intern_str(mrb, str);
+ mrb_iv_check(mrb, sym);
+ name = mrb_symbol_value(sym);
+ mrb_define_method_raw(mrb, c, method,
+ mrb_proc_new_cfunc_with_env(mrb, attr_reader, 1, &name));
+ mrb_gc_arena_restore(mrb, ai);
+ }
+ return mrb_nil_value();
+}
+
+static mrb_value
+attr_writer(mrb_state *mrb, mrb_value obj)
+{
+ mrb_value name = mrb_proc_cfunc_env_get(mrb, 0);
+ mrb_value val;
+
+ mrb_get_args(mrb, "o", &val);
+ mrb_iv_set(mrb, obj, to_sym(mrb, name), val);
+ return val;
+}
+
+static mrb_value
+mrb_mod_attr_writer(mrb_state *mrb, mrb_value mod)
+{
+ struct RClass *c = mrb_class_ptr(mod);
+ mrb_value *argv;
+ mrb_int argc, i;
+ int ai;
+
+ mrb_get_args(mrb, "*", &argv, &argc);
+ ai = mrb_gc_arena_save(mrb);
+ for (i=0; i<argc; i++) {
+ mrb_value name, str, attr;
+ mrb_sym method, sym;
+
+ method = to_sym(mrb, argv[i]);
+
+ /* prepare iv name (@name) */
+ name = mrb_sym2str(mrb, method);
+ str = mrb_str_buf_new(mrb, RSTRING_LEN(name)+1);
+ mrb_str_cat_lit(mrb, str, "@");
+ mrb_str_cat_str(mrb, str, name);
+ sym = mrb_intern_str(mrb, str);
+ mrb_iv_check(mrb, sym);
+ attr = mrb_symbol_value(sym);
+
+ /* prepare method name (name=) */
+ str = mrb_str_buf_new(mrb, RSTRING_LEN(str));
+ mrb_str_cat_str(mrb, str, name);
+ mrb_str_cat_lit(mrb, str, "=");
+ method = mrb_intern_str(mrb, str);
+
+ mrb_define_method_raw(mrb, c, method,
+ mrb_proc_new_cfunc_with_env(mrb, attr_writer, 1, &attr));
+ mrb_gc_arena_restore(mrb, ai);
+ }
+ return mrb_nil_value();
+}
+
+static mrb_value
+mrb_instance_alloc(mrb_state *mrb, mrb_value cv)
+{
+ struct RClass *c = mrb_class_ptr(cv);
+ struct RObject *o;
+ enum mrb_vtype ttype = MRB_INSTANCE_TT(c);
+
+ if (c->tt == MRB_TT_SCLASS)
+ mrb_raise(mrb, E_TYPE_ERROR, "can't create instance of singleton class");
+
+ if (ttype == 0) ttype = MRB_TT_OBJECT;
+ o = (struct RObject*)mrb_obj_alloc(mrb, ttype, c);
+ return mrb_obj_value(o);
+}
+
+/*
+ * call-seq:
+ * class.new(args, ...) -> obj
+ *
+ * Calls <code>allocate</code> to create a new object of
+ * <i>class</i>'s class, then invokes that object's
+ * <code>initialize</code> method, passing it <i>args</i>.
+ * This is the method that ends up getting called whenever
+ * an object is constructed using .new.
+ *
+ */
+
+MRB_API mrb_value
+mrb_instance_new(mrb_state *mrb, mrb_value cv)
+{
+ mrb_value obj, blk;
+ mrb_value *argv;
+ mrb_int argc;
+
+ mrb_get_args(mrb, "*&", &argv, &argc, &blk);
+ obj = mrb_instance_alloc(mrb, cv);
+ mrb_funcall_with_block(mrb, obj, mrb_intern_lit(mrb, "initialize"), argc, argv, blk);
+
+ return obj;
+}
+
+MRB_API mrb_value
+mrb_obj_new(mrb_state *mrb, struct RClass *c, mrb_int argc, const mrb_value *argv)
+{
+ mrb_value obj;
+
+ obj = mrb_instance_alloc(mrb, mrb_obj_value(c));
+ mrb_funcall_argv(mrb, obj, mrb_intern_lit(mrb, "initialize"), argc, argv);
+
+ return obj;
+}
+
+static mrb_value
+mrb_class_initialize(mrb_state *mrb, mrb_value c)
+{
+ mrb_value a, b;
+
+ mrb_get_args(mrb, "|C&", &a, &b);
+ if (!mrb_nil_p(b)) {
+ mrb_yield_with_class(mrb, b, 1, &c, c, mrb_class_ptr(c));
+ }
+ return c;
+}
+
+static mrb_value
+mrb_class_new_class(mrb_state *mrb, mrb_value cv)
+{
+ mrb_int n;
+ mrb_value super, blk;
+ mrb_value new_class;
+
+ n = mrb_get_args(mrb, "|C&", &super, &blk);
+ if (n == 0) {
+ super = mrb_obj_value(mrb->object_class);
+ }
+ new_class = mrb_obj_value(mrb_class_new(mrb, mrb_class_ptr(super)));
+ mrb_funcall_with_block(mrb, new_class, mrb_intern_lit(mrb, "initialize"), n, &super, blk);
+ mrb_class_inherited(mrb, mrb_class_ptr(super), mrb_class_ptr(new_class));
+ return new_class;
+}
+
+static mrb_value
+mrb_class_superclass(mrb_state *mrb, mrb_value klass)
+{
+ struct RClass *c;
+
+ c = mrb_class_ptr(klass);
+ c = c->super;
+ while (c && c->tt == MRB_TT_ICLASS) {
+ c = c->super;
+ }
+ if (!c) return mrb_nil_value();
+ return mrb_obj_value(c);
+}
+
+static mrb_value
+mrb_bob_init(mrb_state *mrb, mrb_value cv)
+{
+ return mrb_nil_value();
+}
+
+static mrb_value
+mrb_bob_not(mrb_state *mrb, mrb_value cv)
+{
+ return mrb_bool_value(!mrb_test(cv));
+}
+
+/* 15.3.1.3.30 */
+/*
+ * call-seq:
+ * obj.method_missing(symbol [, *args] ) -> result
+ *
+ * Invoked by Ruby when <i>obj</i> is sent a message it cannot handle.
+ * <i>symbol</i> is the symbol for the method called, and <i>args</i>
+ * are any arguments that were passed to it. By default, the interpreter
+ * raises an error when this method is called. However, it is possible
+ * to override the method to provide more dynamic behavior.
+ * If it is decided that a particular method should not be handled, then
+ * <i>super</i> should be called, so that ancestors can pick up the
+ * missing method.
+ * The example below creates
+ * a class <code>Roman</code>, which responds to methods with names
+ * consisting of roman numerals, returning the corresponding integer
+ * values.
+ *
+ * class Roman
+ * def romanToInt(str)
+ * # ...
+ * end
+ * def method_missing(methId)
+ * str = methId.id2name
+ * romanToInt(str)
+ * end
+ * end
+ *
+ * r = Roman.new
+ * r.iv #=> 4
+ * r.xxiii #=> 23
+ * r.mm #=> 2000
+ */
+static mrb_value
+mrb_bob_missing(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym name;
+ mrb_value *a;
+ mrb_int alen;
+ mrb_sym inspect;
+ mrb_value repr;
+
+ mrb_get_args(mrb, "n*", &name, &a, &alen);
+
+ inspect = mrb_intern_lit(mrb, "inspect");
+ if (mrb->c->ci > mrb->c->cibase && mrb->c->ci[-1].mid == inspect) {
+ /* method missing in inspect; avoid recursion */
+ repr = mrb_any_to_s(mrb, mod);
+ }
+ else if (mrb_respond_to(mrb, mod, inspect) && mrb->c->ci - mrb->c->cibase < 64) {
+ repr = mrb_funcall_argv(mrb, mod, inspect, 0, 0);
+ if (RSTRING_LEN(repr) > 64) {
+ repr = mrb_any_to_s(mrb, mod);
+ }
+ }
+ else {
+ repr = mrb_any_to_s(mrb, mod);
+ }
+
+ mrb_no_method_error(mrb, name, alen, a, "undefined method '%S' for %S", mrb_sym2str(mrb, name), repr);
+ /* not reached */
+ return mrb_nil_value();
+}
+
+MRB_API mrb_bool
+mrb_obj_respond_to(mrb_state *mrb, struct RClass* c, mrb_sym mid)
+{
+ khiter_t k;
+
+ while (c) {
+ khash_t(mt) *h = c->mt;
+
+ if (h) {
+ k = kh_get(mt, mrb, h, mid);
+ if (k != kh_end(h)) {
+ if (kh_value(h, k)) {
+ return TRUE; /* method exists */
+ }
+ else {
+ return FALSE; /* undefined method */
+ }
+ }
+ }
+ c = c->super;
+ }
+ return FALSE; /* no method */
+}
+
+MRB_API mrb_bool
+mrb_respond_to(mrb_state *mrb, mrb_value obj, mrb_sym mid)
+{
+ return mrb_obj_respond_to(mrb, mrb_class(mrb, obj), mid);
+}
+
+MRB_API mrb_value
+mrb_class_path(mrb_state *mrb, struct RClass *c)
+{
+ mrb_value path;
+ const char *name;
+ mrb_sym classpath = mrb_intern_lit(mrb, "__classpath__");
+
+ path = mrb_obj_iv_get(mrb, (struct RObject*)c, classpath);
+ if (mrb_nil_p(path)) {
+ struct RClass *outer = mrb_class_outer_module(mrb, c);
+ mrb_sym sym = mrb_class_sym(mrb, c, outer);
+ mrb_int len;
+
+ if (sym == 0) {
+ return mrb_nil_value();
+ }
+ else if (outer && outer != mrb->object_class) {
+ mrb_value base = mrb_class_path(mrb, outer);
+ path = mrb_str_buf_new(mrb, 0);
+ if (mrb_nil_p(base)) {
+ mrb_str_cat_lit(mrb, path, "#<Class:");
+ mrb_str_concat(mrb, path, mrb_ptr_to_str(mrb, outer));
+ mrb_str_cat_lit(mrb, path, ">");
+ }
+ else {
+ mrb_str_concat(mrb, path, base);
+ }
+ mrb_str_cat_lit(mrb, path, "::");
+ name = mrb_sym2name_len(mrb, sym, &len);
+ mrb_str_cat(mrb, path, name, len);
+ }
+ else {
+ name = mrb_sym2name_len(mrb, sym, &len);
+ path = mrb_str_new(mrb, name, len);
+ }
+ mrb_obj_iv_set(mrb, (struct RObject*)c, classpath, path);
+ }
+ return path;
+}
+
+MRB_API struct RClass *
+mrb_class_real(struct RClass* cl)
+{
+ if (cl == 0)
+ return NULL;
+ while ((cl->tt == MRB_TT_SCLASS) || (cl->tt == MRB_TT_ICLASS)) {
+ cl = cl->super;
+ }
+ return cl;
+}
+
+MRB_API const char*
+mrb_class_name(mrb_state *mrb, struct RClass* c)
+{
+ mrb_value path = mrb_class_path(mrb, c);
+ if (mrb_nil_p(path)) {
+ path = mrb_str_new_lit(mrb, "#<Class:");
+ mrb_str_concat(mrb, path, mrb_ptr_to_str(mrb, c));
+ mrb_str_cat_lit(mrb, path, ">");
+ }
+ return RSTRING_PTR(path);
+}
+
+MRB_API const char*
+mrb_obj_classname(mrb_state *mrb, mrb_value obj)
+{
+ return mrb_class_name(mrb, mrb_obj_class(mrb, obj));
+}
+
+/*!
+ * Ensures a class can be derived from super.
+ *
+ * \param super a reference to an object.
+ * \exception TypeError if \a super is not a Class or \a super is a singleton class.
+ */
+static void
+mrb_check_inheritable(mrb_state *mrb, struct RClass *super)
+{
+ if (super->tt != MRB_TT_CLASS) {
+ mrb_raisef(mrb, E_TYPE_ERROR, "superclass must be a Class (%S given)", mrb_obj_value(super));
+ }
+ if (super->tt == MRB_TT_SCLASS) {
+ mrb_raise(mrb, E_TYPE_ERROR, "can't make subclass of singleton class");
+ }
+ if (super == mrb->class_class) {
+ mrb_raise(mrb, E_TYPE_ERROR, "can't make subclass of Class");
+ }
+}
+
+/*!
+ * Creates a new class.
+ * \param super a class from which the new class derives.
+ * \exception TypeError \a super is not inheritable.
+ * \exception TypeError \a super is the Class class.
+ */
+MRB_API struct RClass*
+mrb_class_new(mrb_state *mrb, struct RClass *super)
+{
+ struct RClass *c;
+
+ if (super) {
+ mrb_check_inheritable(mrb, super);
+ }
+ c = boot_defclass(mrb, super);
+ if (super) {
+ MRB_SET_INSTANCE_TT(c, MRB_INSTANCE_TT(super));
+ }
+ make_metaclass(mrb, c);
+
+ return c;
+}
+
+/*!
+ * Creates a new module.
+ */
+MRB_API struct RClass*
+mrb_module_new(mrb_state *mrb)
+{
+ struct RClass *m = (struct RClass*)mrb_obj_alloc(mrb, MRB_TT_MODULE, mrb->module_class);
+ m->mt = kh_init(mt, mrb);
+
+ return m;
+}
+
+/*
+ * call-seq:
+ * obj.class => class
+ *
+ * Returns the class of <i>obj</i>, now preferred over
+ * <code>Object#type</code>, as an object's type in Ruby is only
+ * loosely tied to that object's class. This method must always be
+ * called with an explicit receiver, as <code>class</code> is also a
+ * reserved word in Ruby.
+ *
+ * 1.class #=> Fixnum
+ * self.class #=> Object
+ */
+
+MRB_API struct RClass*
+mrb_obj_class(mrb_state *mrb, mrb_value obj)
+{
+ return mrb_class_real(mrb_class(mrb, obj));
+}
+
+MRB_API void
+mrb_alias_method(mrb_state *mrb, struct RClass *c, mrb_sym a, mrb_sym b)
+{
+ struct RProc *m = mrb_method_search(mrb, c, b);
+
+ mrb_define_method_vm(mrb, c, a, mrb_obj_value(m));
+}
+
+/*!
+ * Defines an alias of a method.
+ * \param klass the class which the original method belongs to
+ * \param name1 a new name for the method
+ * \param name2 the original name of the method
+ */
+MRB_API void
+mrb_define_alias(mrb_state *mrb, struct RClass *klass, const char *name1, const char *name2)
+{
+ mrb_alias_method(mrb, klass, mrb_intern_cstr(mrb, name1), mrb_intern_cstr(mrb, name2));
+}
+
+/*
+ * call-seq:
+ * mod.to_s -> string
+ *
+ * Return a string representing this module or class. For basic
+ * classes and modules, this is the name. For singletons, we
+ * show information on the thing we're attached to as well.
+ */
+
+static mrb_value
+mrb_mod_to_s(mrb_state *mrb, mrb_value klass)
+{
+ mrb_value str;
+
+ if (mrb_type(klass) == MRB_TT_SCLASS) {
+ mrb_value v = mrb_iv_get(mrb, klass, mrb_intern_lit(mrb, "__attached__"));
+
+ str = mrb_str_new_lit(mrb, "#<Class:");
+
+ switch (mrb_type(v)) {
+ case MRB_TT_CLASS:
+ case MRB_TT_MODULE:
+ case MRB_TT_SCLASS:
+ mrb_str_append(mrb, str, mrb_inspect(mrb, v));
+ break;
+ default:
+ mrb_str_append(mrb, str, mrb_any_to_s(mrb, v));
+ break;
+ }
+ return mrb_str_cat_lit(mrb, str, ">");
+ }
+ else {
+ struct RClass *c;
+ mrb_value path;
+
+ str = mrb_str_buf_new(mrb, 32);
+ c = mrb_class_ptr(klass);
+ path = mrb_class_path(mrb, c);
+
+ if (mrb_nil_p(path)) {
+ switch (mrb_type(klass)) {
+ case MRB_TT_CLASS:
+ mrb_str_cat_lit(mrb, str, "#<Class:");
+ break;
+
+ case MRB_TT_MODULE:
+ mrb_str_cat_lit(mrb, str, "#<Module:");
+ break;
+
+ default:
+ /* Shouldn't be happened? */
+ mrb_str_cat_lit(mrb, str, "#<??????:");
+ break;
+ }
+ mrb_str_concat(mrb, str, mrb_ptr_to_str(mrb, c));
+ return mrb_str_cat_lit(mrb, str, ">");
+ }
+ else {
+ return path;
+ }
+ }
+}
+
+static mrb_value
+mrb_mod_alias(mrb_state *mrb, mrb_value mod)
+{
+ struct RClass *c = mrb_class_ptr(mod);
+ mrb_sym new_name, old_name;
+
+ mrb_get_args(mrb, "nn", &new_name, &old_name);
+ mrb_alias_method(mrb, c, new_name, old_name);
+ return mrb_nil_value();
+}
+
+static void
+undef_method(mrb_state *mrb, struct RClass *c, mrb_sym a)
+{
+ mrb_value m;
+
+ if (!mrb_obj_respond_to(mrb, c, a)) {
+ mrb_name_error(mrb, a, "undefined method '%S' for class '%S'", mrb_sym2str(mrb, a), mrb_obj_value(c));
+ }
+ else {
+ SET_PROC_VALUE(m, 0);
+ mrb_define_method_vm(mrb, c, a, m);
+ }
+}
+
+MRB_API void
+mrb_undef_method(mrb_state *mrb, struct RClass *c, const char *name)
+{
+ undef_method(mrb, c, mrb_intern_cstr(mrb, name));
+}
+
+MRB_API void
+mrb_undef_class_method(mrb_state *mrb, struct RClass *c, const char *name)
+{
+ mrb_undef_method(mrb, mrb_class_ptr(mrb_singleton_class(mrb, mrb_obj_value(c))), name);
+}
+
+static mrb_value
+mrb_mod_undef(mrb_state *mrb, mrb_value mod)
+{
+ struct RClass *c = mrb_class_ptr(mod);
+ mrb_int argc;
+ mrb_value *argv;
+
+ mrb_get_args(mrb, "*", &argv, &argc);
+ while (argc--) {
+ undef_method(mrb, c, mrb_symbol(*argv));
+ argv++;
+ }
+ return mrb_nil_value();
+}
+
+static mrb_value
+mod_define_method(mrb_state *mrb, mrb_value self)
+{
+ struct RClass *c = mrb_class_ptr(self);
+ struct RProc *p;
+ mrb_sym mid;
+ mrb_value blk;
+
+ mrb_get_args(mrb, "n&", &mid, &blk);
+ if (mrb_nil_p(blk)) {
+ mrb_raise(mrb, E_ARGUMENT_ERROR, "no block given");
+ }
+ p = (struct RProc*)mrb_obj_alloc(mrb, MRB_TT_PROC, mrb->proc_class);
+ mrb_proc_copy(p, mrb_proc_ptr(blk));
+ p->flags |= MRB_PROC_STRICT;
+ mrb_define_method_raw(mrb, c, mid, p);
+ return mrb_symbol_value(mid);
+}
+
+static void
+check_cv_name_str(mrb_state *mrb, mrb_value str)
+{
+ const char *s = RSTRING_PTR(str);
+ mrb_int len = RSTRING_LEN(str);
+
+ if (len < 3 || !(s[0] == '@' && s[1] == '@')) {
+ mrb_name_error(mrb, mrb_intern_str(mrb, str), "`%S' is not allowed as a class variable name", str);
+ }
+}
+
+static void
+check_cv_name_sym(mrb_state *mrb, mrb_sym id)
+{
+ check_cv_name_str(mrb, mrb_sym2str(mrb, id));
+}
+
+/* 15.2.2.4.16 */
+/*
+ * call-seq:
+ * obj.class_variable_defined?(symbol) -> true or false
+ *
+ * Returns <code>true</code> if the given class variable is defined
+ * in <i>obj</i>.
+ *
+ * class Fred
+ * @@foo = 99
+ * end
+ * Fred.class_variable_defined?(:@@foo) #=> true
+ * Fred.class_variable_defined?(:@@bar) #=> false
+ */
+
+static mrb_value
+mrb_mod_cvar_defined(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym id;
+
+ mrb_get_args(mrb, "n", &id);
+ check_cv_name_sym(mrb, id);
+ return mrb_bool_value(mrb_cv_defined(mrb, mod, id));
+}
+
+/* 15.2.2.4.17 */
+/*
+ * call-seq:
+ * mod.class_variable_get(symbol) -> obj
+ *
+ * Returns the value of the given class variable (or throws a
+ * <code>NameError</code> exception). The <code>@@</code> part of the
+ * variable name should be included for regular class variables
+ *
+ * class Fred
+ * @@foo = 99
+ * end
+ * Fred.class_variable_get(:@@foo) #=> 99
+ */
+
+static mrb_value
+mrb_mod_cvar_get(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym id;
+
+ mrb_get_args(mrb, "n", &id);
+ check_cv_name_sym(mrb, id);
+ return mrb_cv_get(mrb, mod, id);
+}
+
+/* 15.2.2.4.18 */
+/*
+ * call-seq:
+ * obj.class_variable_set(symbol, obj) -> obj
+ *
+ * Sets the class variable names by <i>symbol</i> to
+ * <i>object</i>.
+ *
+ * class Fred
+ * @@foo = 99
+ * def foo
+ * @@foo
+ * end
+ * end
+ * Fred.class_variable_set(:@@foo, 101) #=> 101
+ * Fred.new.foo #=> 101
+ */
+
+static mrb_value
+mrb_mod_cvar_set(mrb_state *mrb, mrb_value mod)
+{
+ mrb_value value;
+ mrb_sym id;
+
+ mrb_get_args(mrb, "no", &id, &value);
+ check_cv_name_sym(mrb, id);
+ mrb_cv_set(mrb, mod, id, value);
+ return value;
+}
+
+/* 15.2.2.4.39 */
+/*
+ * call-seq:
+ * remove_class_variable(sym) -> obj
+ *
+ * Removes the definition of the <i>sym</i>, returning that
+ * constant's value.
+ *
+ * class Dummy
+ * @@var = 99
+ * puts @@var
+ * p class_variables
+ * remove_class_variable(:@@var)
+ * p class_variables
+ * end
+ *
+ * <em>produces:</em>
+ *
+ * 99
+ * [:@@var]
+ * []
+ */
+
+static mrb_value
+mrb_mod_remove_cvar(mrb_state *mrb, mrb_value mod)
+{
+ mrb_value val;
+ mrb_sym id;
+
+ mrb_get_args(mrb, "n", &id);
+ check_cv_name_sym(mrb, id);
+
+ val = mrb_iv_remove(mrb, mod, id);
+ if (!mrb_undef_p(val)) return val;
+
+ if (mrb_cv_defined(mrb, mod, id)) {
+ mrb_name_error(mrb, id, "cannot remove %S for %S",
+ mrb_sym2str(mrb, id), mod);
+ }
+
+ mrb_name_error(mrb, id, "class variable %S not defined for %S",
+ mrb_sym2str(mrb, id), mod);
+
+ /* not reached */
+ return mrb_nil_value();
+}
+
+/* 15.2.2.4.34 */
+/*
+ * call-seq:
+ * mod.method_defined?(symbol) -> true or false
+ *
+ * Returns +true+ if the named method is defined by
+ * _mod_ (or its included modules and, if _mod_ is a class,
+ * its ancestors). Public and protected methods are matched.
+ *
+ * module A
+ * def method1() end
+ * end
+ * class B
+ * def method2() end
+ * end
+ * class C < B
+ * include A
+ * def method3() end
+ * end
+ *
+ * A.method_defined? :method1 #=> true
+ * C.method_defined? "method1" #=> true
+ * C.method_defined? "method2" #=> true
+ * C.method_defined? "method3" #=> true
+ * C.method_defined? "method4" #=> false
+ */
+
+static mrb_value
+mrb_mod_method_defined(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym id;
+
+ mrb_get_args(mrb, "n", &id);
+ return mrb_bool_value(mrb_obj_respond_to(mrb, mrb_class_ptr(mod), id));
+}
+
+static void
+remove_method(mrb_state *mrb, mrb_value mod, mrb_sym mid)
+{
+ struct RClass *c = mrb_class_ptr(mod);
+ khash_t(mt) *h = c->mt;
+ khiter_t k;
+
+ if (h) {
+ k = kh_get(mt, mrb, h, mid);
+ if (k != kh_end(h)) {
+ kh_del(mt, mrb, h, k);
+ return;
+ }
+ }
+
+ mrb_name_error(mrb, mid, "method `%S' not defined in %S",
+ mrb_sym2str(mrb, mid), mod);
+}
+
+/* 15.2.2.4.41 */
+/*
+ * call-seq:
+ * remove_method(symbol) -> self
+ *
+ * Removes the method identified by _symbol_ from the current
+ * class. For an example, see <code>Module.undef_method</code>.
+ */
+
+static mrb_value
+mrb_mod_remove_method(mrb_state *mrb, mrb_value mod)
+{
+ mrb_int argc;
+ mrb_value *argv;
+
+ mrb_get_args(mrb, "*", &argv, &argc);
+ while (argc--) {
+ remove_method(mrb, mod, mrb_symbol(*argv));
+ argv++;
+ }
+ return mod;
+}
+
+
+
+static void
+check_const_name_str(mrb_state *mrb, mrb_value str)
+{
+ if (RSTRING_LEN(str) < 1 || !ISUPPER(*RSTRING_PTR(str))) {
+ mrb_name_error(mrb, mrb_intern_str(mrb, str), "wrong constant name %S", str);
+ }
+}
+
+static void
+check_const_name_sym(mrb_state *mrb, mrb_sym id)
+{
+ check_const_name_str(mrb, mrb_sym2str(mrb, id));
+}
+
+static mrb_value
+const_defined(mrb_state *mrb, mrb_value mod, mrb_sym id, mrb_bool inherit)
+{
+ if (inherit) {
+ return mrb_bool_value(mrb_const_defined(mrb, mod, id));
+ }
+ return mrb_bool_value(mrb_const_defined_at(mrb, mod, id));
+}
+
+static mrb_value
+mrb_mod_const_defined(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym id;
+ mrb_bool inherit = TRUE;
+
+ mrb_get_args(mrb, "n|b", &id, &inherit);
+ check_const_name_sym(mrb, id);
+ return const_defined(mrb, mod, id, inherit);
+}
+
+static mrb_value
+mrb_mod_const_get(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym id;
+
+ mrb_get_args(mrb, "n", &id);
+ check_const_name_sym(mrb, id);
+ return mrb_const_get(mrb, mod, id);
+}
+
+static mrb_value
+mrb_mod_const_set(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym id;
+ mrb_value value;
+
+ mrb_get_args(mrb, "no", &id, &value);
+ check_const_name_sym(mrb, id);
+ mrb_const_set(mrb, mod, id, value);
+ return value;
+}
+
+static mrb_value
+mrb_mod_remove_const(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym id;
+ mrb_value val;
+
+ mrb_get_args(mrb, "n", &id);
+ check_const_name_sym(mrb, id);
+ val = mrb_iv_remove(mrb, mod, id);
+ if (mrb_undef_p(val)) {
+ mrb_name_error(mrb, id, "constant %S not defined", mrb_sym2str(mrb, id));
+ }
+ return val;
+}
+
+static mrb_value
+mrb_mod_const_missing(mrb_state *mrb, mrb_value mod)
+{
+ mrb_sym sym;
+
+ mrb_get_args(mrb, "n", &sym);
+
+ if (mrb_class_real(mrb_class_ptr(mod)) != mrb->object_class) {
+ mrb_name_error(mrb, sym, "uninitialized constant %S::%S",
+ mod,
+ mrb_sym2str(mrb, sym));
+ }
+ else {
+ mrb_name_error(mrb, sym, "uninitialized constant %S",
+ mrb_sym2str(mrb, sym));
+ }
+ /* not reached */
+ return mrb_nil_value();
+}
+
+static mrb_value
+mrb_mod_s_constants(mrb_state *mrb, mrb_value mod)
+{
+ mrb_raise(mrb, E_NOTIMP_ERROR, "Module.constants not implemented");
+ return mrb_nil_value(); /* not reached */
+}
+
+static mrb_value
+mrb_mod_eqq(mrb_state *mrb, mrb_value mod)
+{
+ mrb_value obj;
+ mrb_bool eqq;
+
+ mrb_get_args(mrb, "o", &obj);
+ eqq = mrb_obj_is_kind_of(mrb, obj, mrb_class_ptr(mod));
+
+ return mrb_bool_value(eqq);
+}
+
+MRB_API mrb_value
+mrb_mod_module_function(mrb_state *mrb, mrb_value mod)
+{
+ mrb_value *argv;
+ mrb_int argc, i;
+ mrb_sym mid;
+ struct RProc *method_rproc;
+ struct RClass *rclass;
+ int ai;
+
+ mrb_check_type(mrb, mod, MRB_TT_MODULE);
+
+ mrb_get_args(mrb, "*", &argv, &argc);
+ if(argc == 0) {
+ /* set MODFUNC SCOPE if implemented */
+ return mod;
+ }
+
+ /* set PRIVATE method visibility if implemented */
+ /* mrb_mod_dummy_visibility(mrb, mod); */
+
+ for (i=0; i<argc; i++) {
+ mrb_check_type(mrb, argv[i], MRB_TT_SYMBOL);
+
+ mid = mrb_symbol(argv[i]);
+ rclass = mrb_class_ptr(mod);
+ method_rproc = mrb_method_search(mrb, rclass, mid);
+
+ prepare_singleton_class(mrb, (struct RBasic*)rclass);
+ ai = mrb_gc_arena_save(mrb);
+ mrb_define_method_raw(mrb, rclass->c, mid, method_rproc);
+ mrb_gc_arena_restore(mrb, ai);
+ }
+
+ return mod;
+}
+
+void
+mrb_init_class(mrb_state *mrb)
+{
+ struct RClass *bob; /* BasicObject */
+ struct RClass *obj; /* Object */
+ struct RClass *mod; /* Module */
+ struct RClass *cls; /* Class */
+
+ /* boot class hierarchy */
+ bob = boot_defclass(mrb, 0);
+ obj = boot_defclass(mrb, bob); mrb->object_class = obj;
+ mod = boot_defclass(mrb, obj); mrb->module_class = mod;/* obj -> mod */
+ cls = boot_defclass(mrb, mod); mrb->class_class = cls; /* obj -> cls */
+ /* fix-up loose ends */
+ bob->c = obj->c = mod->c = cls->c = cls;
+ make_metaclass(mrb, bob);
+ make_metaclass(mrb, obj);
+ make_metaclass(mrb, mod);
+ make_metaclass(mrb, cls);
+
+ /* name basic classes */
+ mrb_define_const(mrb, bob, "BasicObject", mrb_obj_value(bob));
+ mrb_define_const(mrb, obj, "BasicObject", mrb_obj_value(bob));
+ mrb_define_const(mrb, obj, "Object", mrb_obj_value(obj));
+ mrb_define_const(mrb, obj, "Module", mrb_obj_value(mod));
+ mrb_define_const(mrb, obj, "Class", mrb_obj_value(cls));
+
+ /* name each classes */
+ name_class(mrb, bob, mrb_intern_lit(mrb, "BasicObject"));
+ name_class(mrb, obj, mrb_intern_lit(mrb, "Object")); /* 15.2.1 */
+ name_class(mrb, mod, mrb_intern_lit(mrb, "Module")); /* 15.2.2 */
+ name_class(mrb, cls, mrb_intern_lit(mrb, "Class")); /* 15.2.3 */
+
+ mrb->proc_class = mrb_define_class(mrb, "Proc", mrb->object_class); /* 15.2.17 */
+ MRB_SET_INSTANCE_TT(mrb->proc_class, MRB_TT_PROC);
+
+ MRB_SET_INSTANCE_TT(cls, MRB_TT_CLASS);
+ mrb_define_method(mrb, bob, "initialize", mrb_bob_init, MRB_ARGS_NONE());
+ mrb_define_method(mrb, bob, "!", mrb_bob_not, MRB_ARGS_NONE());
+ mrb_define_method(mrb, bob, "method_missing", mrb_bob_missing, MRB_ARGS_ANY()); /* 15.3.1.3.30 */
+
+ mrb_define_class_method(mrb, cls, "new", mrb_class_new_class, MRB_ARGS_OPT(1));
+ mrb_define_method(mrb, cls, "superclass", mrb_class_superclass, MRB_ARGS_NONE()); /* 15.2.3.3.4 */
+ mrb_define_method(mrb, cls, "new", mrb_instance_new, MRB_ARGS_ANY()); /* 15.2.3.3.3 */
+ mrb_define_method(mrb, cls, "initialize", mrb_class_initialize, MRB_ARGS_OPT(1)); /* 15.2.3.3.1 */
+ mrb_define_method(mrb, cls, "inherited", mrb_bob_init, MRB_ARGS_REQ(1));
+
+ MRB_SET_INSTANCE_TT(mod, MRB_TT_MODULE);
+ mrb_define_method(mrb, mod, "class_variable_defined?", mrb_mod_cvar_defined, MRB_ARGS_REQ(1)); /* 15.2.2.4.16 */
+ mrb_define_method(mrb, mod, "class_variable_get", mrb_mod_cvar_get, MRB_ARGS_REQ(1)); /* 15.2.2.4.17 */
+ mrb_define_method(mrb, mod, "class_variable_set", mrb_mod_cvar_set, MRB_ARGS_REQ(2)); /* 15.2.2.4.18 */
+ mrb_define_method(mrb, mod, "extend_object", mrb_mod_extend_object, MRB_ARGS_REQ(1)); /* 15.2.2.4.25 */
+ mrb_define_method(mrb, mod, "extended", mrb_bob_init, MRB_ARGS_REQ(1)); /* 15.2.2.4.26 */
+ mrb_define_method(mrb, mod, "include", mrb_mod_include, MRB_ARGS_ANY()); /* 15.2.2.4.27 */
+ mrb_define_method(mrb, mod, "include?", mrb_mod_include_p, MRB_ARGS_REQ(1)); /* 15.2.2.4.28 */
+ mrb_define_method(mrb, mod, "append_features", mrb_mod_append_features, MRB_ARGS_REQ(1)); /* 15.2.2.4.10 */
+ mrb_define_method(mrb, mod, "class_eval", mrb_mod_module_eval, MRB_ARGS_ANY()); /* 15.2.2.4.15 */
+ mrb_define_method(mrb, mod, "included", mrb_bob_init, MRB_ARGS_REQ(1)); /* 15.2.2.4.29 */
+ mrb_define_method(mrb, mod, "included_modules", mrb_mod_included_modules, MRB_ARGS_NONE()); /* 15.2.2.4.30 */
+ mrb_define_method(mrb, mod, "initialize", mrb_mod_initialize, MRB_ARGS_NONE()); /* 15.2.2.4.31 */
+ mrb_define_method(mrb, mod, "instance_methods", mrb_mod_instance_methods, MRB_ARGS_ANY()); /* 15.2.2.4.33 */
+ mrb_define_method(mrb, mod, "method_defined?", mrb_mod_method_defined, MRB_ARGS_REQ(1)); /* 15.2.2.4.34 */
+ mrb_define_method(mrb, mod, "module_eval", mrb_mod_module_eval, MRB_ARGS_ANY()); /* 15.2.2.4.35 */
+ mrb_define_method(mrb, mod, "module_function", mrb_mod_module_function, MRB_ARGS_ANY());
+ mrb_define_method(mrb, mod, "private", mrb_mod_dummy_visibility, MRB_ARGS_ANY()); /* 15.2.2.4.36 */
+ mrb_define_method(mrb, mod, "protected", mrb_mod_dummy_visibility, MRB_ARGS_ANY()); /* 15.2.2.4.37 */
+ mrb_define_method(mrb, mod, "public", mrb_mod_dummy_visibility, MRB_ARGS_ANY()); /* 15.2.2.4.38 */
+ mrb_define_method(mrb, mod, "remove_class_variable", mrb_mod_remove_cvar, MRB_ARGS_REQ(1)); /* 15.2.2.4.39 */
+ mrb_define_method(mrb, mod, "remove_method", mrb_mod_remove_method, MRB_ARGS_ANY()); /* 15.2.2.4.41 */
+ mrb_define_method(mrb, mod, "attr_reader", mrb_mod_attr_reader, MRB_ARGS_ANY()); /* 15.2.2.4.13 */
+ mrb_define_method(mrb, mod, "attr_writer", mrb_mod_attr_writer, MRB_ARGS_ANY()); /* 15.2.2.4.14 */
+ mrb_define_method(mrb, mod, "to_s", mrb_mod_to_s, MRB_ARGS_NONE());
+ mrb_define_method(mrb, mod, "inspect", mrb_mod_to_s, MRB_ARGS_NONE());
+ mrb_define_method(mrb, mod, "alias_method", mrb_mod_alias, MRB_ARGS_ANY()); /* 15.2.2.4.8 */
+ mrb_define_method(mrb, mod, "ancestors", mrb_mod_ancestors, MRB_ARGS_NONE()); /* 15.2.2.4.9 */
+ mrb_define_method(mrb, mod, "undef_method", mrb_mod_undef, MRB_ARGS_ANY()); /* 15.2.2.4.41 */
+ mrb_define_method(mrb, mod, "const_defined?", mrb_mod_const_defined, MRB_ARGS_ARG(1,1)); /* 15.2.2.4.20 */
+ mrb_define_method(mrb, mod, "const_get", mrb_mod_const_get, MRB_ARGS_REQ(1)); /* 15.2.2.4.21 */
+ mrb_define_method(mrb, mod, "const_set", mrb_mod_const_set, MRB_ARGS_REQ(2)); /* 15.2.2.4.23 */
+ mrb_define_method(mrb, mod, "constants", mrb_mod_constants, MRB_ARGS_OPT(1)); /* 15.2.2.4.24 */
+ mrb_define_method(mrb, mod, "remove_const", mrb_mod_remove_const, MRB_ARGS_REQ(1)); /* 15.2.2.4.40 */
+ mrb_define_method(mrb, mod, "const_missing", mrb_mod_const_missing, MRB_ARGS_REQ(1));
+ mrb_define_method(mrb, mod, "define_method", mod_define_method, MRB_ARGS_REQ(1));
+ mrb_define_method(mrb, mod, "class_variables", mrb_mod_class_variables, MRB_ARGS_NONE()); /* 15.2.2.4.19 */
+ mrb_define_method(mrb, mod, "===", mrb_mod_eqq, MRB_ARGS_REQ(1));
+ mrb_define_class_method(mrb, mod, "constants", mrb_mod_s_constants, MRB_ARGS_ANY()); /* 15.2.2.3.1 */
+
+ mrb_undef_method(mrb, cls, "append_features");
+ mrb_undef_method(mrb, cls, "extend_object");
+}
+