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#ifndef DataFormats_Common_CloningPtr_h
#define DataFormats_Common_CloningPtr_h
// -*- C++ -*-
//
// Package: Common
// Class : CloningPtr
//
/**\class CloningPtr CloningPtr.h DataFormats/Common/interface/CloningPtr.h
Description: A smart pointer that owns its pointer and clones it when necessary
Usage:
<usage>
*/
//
// Original Author: Chris Jones
// Created: Mon Apr 3 16:43:29 EDT 2006
//
// system include files
#include <algorithm>
#include <memory>
// user include files
#include "DataFormats/Common/interface/ClonePolicy.h"
// forward declarations
namespace edm {
template <class T, class P = ClonePolicy<T> >
class CloningPtr {
public:
CloningPtr() : ptr_(nullptr) {}
CloningPtr(const T& iPtr) : ptr_(P::clone(iPtr)) {}
CloningPtr(std::unique_ptr<T> iPtr) : ptr_(iPtr.release()) {}
CloningPtr(const CloningPtr<T, P>& iPtr) : ptr_(P::clone(*(iPtr.ptr_))) {}
CloningPtr<T, P>& operator=(const CloningPtr<T, P>& iRHS) {
CloningPtr<T, P> temp(iRHS);
swap(temp);
return *this;
}
void swap(CloningPtr<T, P>& iPtr) { std::swap(ptr_, iPtr.ptr_); }
~CloningPtr() { delete ptr_; }
// ---------- const member functions ---------------------
T& operator*() { return *ptr_; }
T* operator->() { return ptr_; }
T* get() { return ptr_; }
private:
T* ptr_;
};
// Free swap function
template <class T, class P>
inline void swap(CloningPtr<T, P>& a, CloningPtr<T, P>& b) {
a.swap(b);
}
} // namespace edm
#endif
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