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/*
list.hh -- part of flowerlib
(c) 1996 Han-Wen Nienhuys & Jan Nieuwenhuizen
*/
#ifndef PLIST_HH
#define PLIST_HH
#include "list.hh"
/// Use for list of pointers, e.g. PointerList<AbstractType*>.
template<class T>
class PointerList : public List<void *>
{
public:
PCursor<T> top() { return PCursor<T> (List<void*>::top()); }
PCursor<T> bottom() { return PCursor<T> (List<void*>::bottom()); }
PointerList( const T& thing ) : List<void*>( thing ) { }
PointerList() {}
};
/// intrusive pl. deletes pointers given to it.
template<class T>
struct IPointerList : public PointerList<T> {
IPointerList(IPointerList&) { set_empty(); }
IPointerList() { }
protected:
virtual void remove( Cursor<void*> me ) { remove (PCursor<T>(me)); }
virtual void remove( PCursor<T> me );
};
/**
NOTE:
The copy constructor doesn't do what you'd want:
Since T might have a virtual ctor, we don't try to do a
new T(*cursor)
You have to copy this yourself, or use the macro PointerList__copy
*/
#define IPointerList__copy(T, to, from, op) \
for (PCursor<T> _pc_(from); _pc_.ok(); _pc_++)\
to.bottom().add(_pc_->op)\
\
template<class T>
void PL_copy(IPointerList<T*> &dst,IPointerList<T*> const&src);
#define PL_instantiate(a) template class PointerList<a*>
#define IPL_instantiate(a) PL_instantiate(a); template class IPointerList<a*>
#include "plist.inl"
#endif
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