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mruby-mruby/src/class.c
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/*
** 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);
}
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 0;
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, outer, name)) {
return module_from_sym(mrb, outer, name);
}
m = mrb_module_new(mrb);
setup_class(mrb, outer, m, name);
return m;
}
struct RClass*
mrb_define_module_id(mrb_state *mrb, mrb_sym name)
{
return define_module(mrb, name, mrb->object_class);
}
struct RClass*
mrb_define_module(mrb_state *mrb, const char *name)
{
return define_module(mrb, mrb_intern_cstr(mrb, name), mrb->object_class);
}
struct RClass*
mrb_vm_define_module(mrb_state *mrb, mrb_value outer, mrb_sym id)
{
return define_module(mrb, id, mrb_class_ptr(outer));
}
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, 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;
}
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);
}
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);
}
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_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_funcall(mrb, mrb_obj_value(mrb_class_real(c->super)), "inherited", 1, mrb_obj_value(c));
return c;
}
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));
}
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));
}
struct RClass *
mrb_class_get(mrb_state *mrb, const char *name)
{
return mrb_class_get_under(mrb, mrb->object_class, name);
}
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));
}
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.
*/
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;
}
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);
}
}
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);
}
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);
}
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);
}
}
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");
}
/*
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*,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*,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.
*/
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 = 0;
mrb_bool given = 1;
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 = 0;
}
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;
int *pl = 0;
ps = va_arg(ap, char**);
pl = va_arg(ap, int*);
if (i < argc) {
ss = to_str(mrb, *sp++);
*ps = RSTRING_PTR(ss);
*pl = RSTRING_LEN(ss);
i++;
}
}
break;
case 'z':
{
mrb_value ss;
char **ps;
ps = va_arg(ap, 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++;
if (mrb_type(ss) == MRB_TT_SYMBOL) {
*symp = mrb_symbol(ss);
}
else if (mrb_string_p(ss)) {
*symp = 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);
}
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 = 1;
break;
case '?':
{
mrb_bool *p;
p = va_arg(ap, mrb_bool*);
*p = given;
}
break;
case '*':
{
mrb_value **var;
int *pl;
var = va_arg(ap, mrb_value**);
pl = va_arg(ap, 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;
}
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 == 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;
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;
}
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);
}
/* 15.2.2.4.35 */
/*
* call-seq:
* mod.class_eval {| | block } -> obj
* mod.module_eval {| | block } -> obj
*
* Evaluates block in the context of _mod_. This can
* be used to add methods to a class. <code>module_eval</code> returns
* the result of evaluating its argument.
*/
mrb_value
mrb_mod_module_eval(mrb_state *mrb, mrb_value mod)
{
mrb_value a, b;
struct RClass *c;
if (mrb_get_args(mrb, "|S&", &a, &b) == 1) {
mrb_raise(mrb, E_NOTIMP_ERROR, "module_eval/class_eval with string not implemented");
}
c = mrb_class_ptr(mod);
return mrb_yield_with_class(mrb, b, 0, 0, mod, c);
}
mrb_value
mrb_mod_dummy_visibility(mrb_state *mrb, mrb_value mod)
{
return mod;
}
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);
}
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);
}
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);
}
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);
}
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 0; /* no method */
}
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
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_value
mrb_instance_new(mrb_state *mrb, mrb_value cv)
{
mrb_value obj, blk;
mrb_value *argv;
int argc;
obj = mrb_instance_alloc(mrb, cv);
mrb_get_args(mrb, "*&", &argv, &argc, &blk);
mrb_funcall_with_block(mrb, obj, mrb_intern_lit(mrb, "initialize"), argc, argv, blk);
return obj;
}
mrb_value
mrb_obj_new(mrb_state *mrb, struct RClass *c, int argc, 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_new_class(mrb_state *mrb, mrb_value cv)
{
mrb_value super, blk;
mrb_value new_class;
if (mrb_get_args(mrb, "|C&", &super, &blk) == 0) {
super = mrb_obj_value(mrb->object_class);
}
new_class = mrb_obj_value(mrb_class_new(mrb, mrb_class_ptr(super)));
if (!mrb_nil_p(blk)) {
mrb_funcall_with_block(mrb, new_class, mrb_intern_lit(mrb, "class_eval"), 0, NULL, blk);
}
mrb_funcall(mrb, super, "inherited", 1, new_class);
return new_class;
}
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;
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)) {
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_raisef(mrb, E_NOMETHOD_ERROR, "undefined method '%S' for %S",
mrb_sym2str(mrb, name), repr);
/* not reached */
return mrb_nil_value();
}
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_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_value
mrb_class_path(mrb_state *mrb, struct RClass *c)
{
mrb_value path;
const char *name;
mrb_int len;
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);
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_plus(mrb, base, mrb_str_new_lit(mrb, "::"));
name = mrb_sym2name_len(mrb, sym, &len);
mrb_str_concat(mrb, path, mrb_str_new(mrb, 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;
}
struct RClass *
mrb_class_real(struct RClass* cl)
{
while ((cl->tt == MRB_TT_SCLASS) || (cl->tt == MRB_TT_ICLASS)) {
cl = cl->super;
}
return cl;
}
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);
}
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.
*/
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.
*/
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.
*/
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
*/
struct RClass*
mrb_obj_class(mrb_state *mrb, mrb_value obj)
{
return mrb_class_real(mrb_class(mrb, obj));
}
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
*/
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;
}
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));
mrb_str_cat_lit(mrb, str, ">");
}
else {
str = path;
}
}
return str;
}
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 {
MRB_SET_VALUE(m, MRB_TT_PROC, value.p, 0);
mrb_define_method_vm(mrb, c, a, m);
}
}
void
mrb_undef_method(mrb_state *mrb, struct RClass *c, const char *name)
{
undef_method(mrb, c, mrb_intern_cstr(mrb, name));
}
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);
}
mrb_value
mrb_mod_undef(mrb_state *mrb, mrb_value mod)
{
struct RClass *c = mrb_class_ptr(mod);
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_sym(mrb_state *mrb, mrb_sym id)
{
const char *s;
mrb_int len;
s = mrb_sym2name_len(mrb, id, &len);
if (len < 3 || !(s[0] == '@' && s[1] == '@')) {
mrb_name_error(mrb, id, "`%S' is not allowed as a class variable name", mrb_sym2str(mrb, id));
}
}
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 mrb_value
get_sym_or_str_arg(mrb_state *mrb)
{
mrb_value sym_or_str;
mrb_get_args(mrb, "o", &sym_or_str);
if (mrb_symbol_p(sym_or_str) || mrb_string_p(sym_or_str)) {
return sym_or_str;
}
else {
mrb_value obj = mrb_funcall(mrb, sym_or_str, "inspect", 0);
mrb_raisef(mrb, E_TYPE_ERROR, "%S is not a symbol", obj);
return mrb_nil_value();
}
}
/* 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_value id;
mrb_bool defined_p;
id = get_sym_or_str_arg(mrb);
if (mrb_symbol_p(id)) {
check_cv_name_sym(mrb, mrb_symbol(id));
defined_p = mrb_cv_defined(mrb, mod, mrb_symbol(id));
}
else {
mrb_value sym;
check_cv_name_str(mrb, id);
sym = mrb_check_intern_str(mrb, id);
if (mrb_nil_p(sym)) {
defined_p = FALSE;
}
else {
defined_p = mrb_cv_defined(mrb, mod, mrb_symbol(sym));
}
}
return mrb_bool_value(defined_p);
}
/* 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]
* []
*/
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_value id;
mrb_bool method_defined_p;
id = get_sym_or_str_arg(mrb);
if (mrb_symbol_p(id)) {
method_defined_p = mrb_obj_respond_to(mrb, mrb_class_ptr(mod), mrb_symbol(id));
}
else {
mrb_value sym = mrb_check_intern_str(mrb, id);
if (mrb_nil_p(sym)) {
method_defined_p = FALSE;
}
else {
method_defined_p = mrb_obj_respond_to(mrb, mrb_class_ptr(mod), mrb_symbol(sym));
}
}
return mrb_bool_value(method_defined_p);
}
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>.
*/
mrb_value
mrb_mod_remove_method(mrb_state *mrb, mrb_value mod)
{
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_sym(mrb_state *mrb, mrb_sym id)
{
const char *s;
mrb_int len;
s = mrb_sym2name_len(mrb, id, &len);
if (len < 1 || !ISUPPER(*s)) {
mrb_name_error(mrb, id, "wrong constant name %S", mrb_sym2str(mrb, id));
}
}
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);
}
}
mrb_value
mrb_mod_const_defined(mrb_state *mrb, mrb_value mod)
{
mrb_value id;
mrb_bool const_defined_p;
id = get_sym_or_str_arg(mrb);
if (mrb_type(id) == MRB_TT_SYMBOL) {
check_const_name_sym(mrb, mrb_symbol(id));
const_defined_p = mrb_const_defined(mrb, mod, mrb_symbol(id));
}
else {
mrb_value sym;
check_const_name_str(mrb, id);
sym = mrb_check_intern_str(mrb, id);
if (mrb_nil_p(sym)) {
const_defined_p = FALSE;
}
else {
const_defined_p = mrb_const_defined(mrb, mod, mrb_symbol(sym));
}
}
return mrb_bool_value(const_defined_p);
}
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);
}
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;
}
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;
}
mrb_value
mrb_mod_const_missing(mrb_state *mrb, mrb_value mod)
{
mrb_sym sym;
mrb_get_args(mrb, "n", &sym);
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);
}
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"));
name_class(mrb, mod, mrb_intern_lit(mrb, "Module"));
name_class(mrb, cls, mrb_intern_lit(mrb, "Class"));
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_ANY());
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, "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, "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, "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, "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_REQ(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_NONE()); /* 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");
}
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