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// file : odb/details/transfer-ptr.hxx
// copyright : Copyright (c) 2009-2015 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_DETAILS_TRANSFER_PTR_HXX
#define ODB_DETAILS_TRANSFER_PTR_HXX
#include <odb/pre.hxx>
#include <memory> // std::auto_ptr, std::unique_ptr
#include <odb/details/config.hxx> // ODB_CXX11
namespace odb
{
namespace details
{
template <typename T>
class transfer_ptr
{
public:
typedef T element_type;
transfer_ptr (): p_ (0) {}
template <typename T1>
transfer_ptr (std::auto_ptr<T1> p): p_ (p.release ()) {}
#ifdef ODB_CXX11
#ifdef ODB_CXX11_NULLPTR
transfer_ptr (std::nullptr_t): p_ (0) {}
#endif
template <typename T1>
transfer_ptr (std::unique_ptr<T1>&& p): p_ (p.release ()) {}
private:
transfer_ptr (const transfer_ptr&);
transfer_ptr& operator= (const transfer_ptr&);
public:
transfer_ptr (transfer_ptr&& p): p_ (p.transfer ()) {}
#else
private:
transfer_ptr& operator= (const transfer_ptr&);
public:
// In our usage transfer_ptr is always created implicitly and
// never const. So while this is not very clean, it is legal.
// Plus it will all go away once we drop C++98 (I can hardly
// wait).
//
transfer_ptr (const transfer_ptr& p)
: p_ (const_cast<transfer_ptr&> (p).transfer ()) {}
#endif
~transfer_ptr () {delete p_;}
T*
transfer ()
{
T* r (p_);
p_ = 0;
return r;
}
private:
T* p_;
};
}
}
#include <odb/post.hxx>
#endif // ODB_DETAILS_TRANSFER_PTR_HXX
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