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// Build don't link:
// GROUPS passed scope pt
class Link {
public:
Link();
Link(Link *);
private:
Link *next_;
friend class IListBase;
friend class IListIterBase;
};
inline
Link::Link() : next_(0)
{
}
inline
Link::Link(Link *next) : next_(next)
{
}
class IListBase {
public:
IListBase();
IListBase(Link *);
void append(Link *);
void insert(Link *);
Link *head();
int empty();
Link *get();
void remove(Link *);
private:
Link *head_;
friend class IListIterBase;
};
inline
IListBase::IListBase() : head_(0)
{
}
inline
IListBase::IListBase(Link *head) : head_(head)
{
}
inline
void IListBase::insert(Link *p)
{
p->next_ = head_;
head_ = p;
}
inline
Link *IListBase::head()
{
return head_;
}
inline
int IListBase::empty()
{
return head_ == 0;
}
inline
Link *IListBase::get()
{
Link *tem = head_;
head_ = head_->next_;
return tem;
}
template<class T> class IListIter;
template<class T>
class IList : private IListBase {
public:
IList() { }
IList(T *p) : IListBase(p) { }
~IList();
void append(T *p) { IListBase::append(p); }
void insert(T *p) { IListBase::insert(p); }
void remove(T *p) { IListBase::remove(p); }
T *head() { return (T *)IListBase::head(); }
T *get() { return (T *)IListBase::get(); }
IListBase::empty;
friend class IListIter<T>;
};
template<class T>
IList<T>::~IList()
{
while (!empty())
delete get();
}
class IListIterBase {
public:
IListIterBase(const IListBase &);
int done();
Link *cur();
void next();
private:
Link *p_;
};
inline
IListIterBase::IListIterBase(const IListBase &list) : p_(list.head_)
{
}
inline
int IListIterBase::done()
{
return p_ == 0;
}
inline
Link *IListIterBase::cur()
{
return p_;
}
inline
void IListIterBase::next()
{
p_ = p_->next_;
}
template<class T>
class IListIter : private IListIterBase {
public:
IListIter(const IList<T> &list) : IListIterBase(list) { }
T *cur() { return (T *)IListIterBase::cur(); }
IListIterBase::next;
IListIterBase::done;
};
struct A {
IList<Link> list;
int x;
void foo();
};
void A::foo()
{
for (IListIter<Link> iter(list); !iter.done(); iter.next())
;
x = 0;
}
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