+ template <typename Arg_>
+ static JSObjectRef Cache(JSContextRef context, Arg_ *arg) {
+ JSObjectRef global(CYGetGlobalObject(context));
+ JSObjectRef cy(CYCastJSObject(context, CYGetProperty(context, global, cy_s)));
+
+ char label[32];
+ sprintf(label, "%s%p", Internal_::Cache_, arg);
+ CYJSString name(label);
+
+ JSValueRef value(CYGetProperty(context, cy, name));
+ if (!JSValueIsUndefined(context, value))
+ return CYCastJSObject(context, value);
+
+ JSObjectRef object(Make(context, arg));
+ CYSetProperty(context, cy, name, object);
+ return object;
+ }
+
+ static Internal_ *Get(JSContextRef context, JSObjectRef object) {
+ _assert(JSValueIsObjectOfClass(context, object, Class_));
+ return static_cast<Internal_ *>(JSObjectGetPrivate(object));
+ }
+};
+
+template <typename Internal_>
+JSClassRef CYPrivate<Internal_>::Class_;
+
+struct Type_privateData :
+ CYRoot
+{
+ ffi_type *ffi_;
+ sig::Type *type_;
+
+ Type_privateData(const char *type) :