class.c:651
void
rb_define_method(klass, name, func, argc)
    VALUE klass;
    const char *name;
    VALUE (*func)();
    int argc;
{
    ID id = rb_intern(name);
    int ex = NOEX_PUBLIC;


    rb_add_method(klass, id, NEW_CFUNC(func, argc), ex);
}
