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// Copyright (c) 1994 James Clark
// See the file COPYING for copying permission.
#ifndef Ptr_INCLUDED
#define Ptr_INCLUDED 1
#include "Boolean.h"
// T must have Resource as a public base class
// T may be an incomplete type
#ifdef SP_NAMESPACE
namespace SP_NAMESPACE {
#endif
template<class T>
class Ptr {
public:
Ptr() : ptr_(0) { }
Ptr(T *ptr);
~Ptr();
Ptr(const Ptr<T> &);
Ptr<T> &operator=(const Ptr<T> &);
Ptr<T> &operator=(T *);
T *pointer() const { return ptr_; }
T *operator->() const { return ptr_; }
T &operator*() const { return *ptr_; }
void swap(Ptr<T> &p) {
T *tem = p.ptr_;
p.ptr_ = ptr_;
ptr_ = tem;
}
Boolean isNull() const { return ptr_ == 0; }
// operator const void *() const { return ptr_; }
void clear();
Boolean operator==(const Ptr<T> &p) const {
return ptr_ == p.ptr_;
}
Boolean operator!=(const Ptr<T> &p) const {
return ptr_ != p.ptr_;
}
Boolean operator==(const T *p) const {
return ptr_ == p;
}
Boolean operator!=(const T *p) const {
return ptr_ != p;
}
private:
T *ptr_;
};
template<class T>
class ConstPtr : private Ptr<T> {
public:
ConstPtr() { }
ConstPtr(T *ptr) : Ptr<T>(ptr) { }
ConstPtr(const Ptr<T> &p) : Ptr<T>(p) { }
ConstPtr(const ConstPtr<T> &p) : Ptr<T>(p) { }
ConstPtr<T> &operator=(const Ptr<T> &p) {
Ptr<T>::operator=(p); return *this;
}
ConstPtr<T> &operator=(const ConstPtr<T> &p) {
Ptr<T>::operator=(p); return *this;
}
ConstPtr<T> &operator=(T *p) {
Ptr<T>::operator=(p); return *this;
}
const T *pointer() const { return Ptr<T>::pointer(); }
const T *operator->() const { return Ptr<T>::pointer(); }
const T &operator*() const { return *Ptr<T>::pointer(); }
void swap(ConstPtr<T> &p) { Ptr<T>::swap(p); }
Ptr<T>::isNull;
Ptr<T>::clear;
Boolean operator==(const Ptr<T> &p) const { return Ptr<T>::operator==(p); }
Boolean operator!=(const Ptr<T> &p) const { return Ptr<T>::operator!=(p); }
Boolean operator==(const ConstPtr<T> &p) const {
return Ptr<T>::operator==(p);
}
Boolean operator!=(const ConstPtr<T> &p) const {
return Ptr<T>::operator!=(p);
}
};
#ifdef SP_NAMESPACE
}
#endif
#endif /* not Ptr_INCLUDED */
#ifdef SP_DEFINE_TEMPLATES
#include "Ptr.cxx"
#endif
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.