4 template <typename T> cell tag(T *value)
6 return RETAG(value,tag_for(T::type_number));
9 inline static cell tag_dynamic(object *value)
11 return RETAG(value,tag_for(value->h.hi_tag()));
19 cell value() const { return value_; }
20 T *untagged() const { return (T *)(UNTAG(value_)); }
23 cell tag = TAG(value_);
24 if(tag == OBJECT_TYPE)
25 return untagged()->h.hi_tag();
30 bool type_p(cell type_) const { return type() == type_; }
32 T *untag_check() const {
33 if(T::type_number != TYPE_COUNT && !type_p(T::type_number))
34 type_error(T::type_number,value_);
38 explicit tagged(cell tagged) : value_(tagged) {
44 explicit tagged(T *untagged) : value_(factor::tag(untagged)) {
50 T *operator->() const { return untagged(); }
51 cell *operator&() const { return &value_; }
53 const tagged<T>& operator=(const T *x) { value_ = tag(x); return *this; }
54 const tagged<T>& operator=(const cell &x) { value_ = x; return *this; }
56 bool operator==(const tagged<T> &x) { return value_ == x.value_; }
57 bool operator!=(const tagged<T> &x) { return value_ != x.value_; }
59 template<typename X> tagged<X> as() { return tagged<X>(value_); }
62 template <typename T> T *untag_check(cell value)
64 return tagged<T>(value).untag_check();
67 template <typename T> T *untag(cell value)
69 return tagged<T>(value).untagged();