libzypp  17.7.0
zypp::RW_pointer< D, DTraits > Struct Template Reference

Wrapper for const correct access via Smart pointer types. More...

#include <PtrTypes.h>

Public Types

typedef DTraits::PtrType PtrType
 
typedef DTraits::constPtrType constPtrType
 

Public Member Functions

 RW_pointer ()
 
 RW_pointer (std::nullptr_t)
 
 RW_pointer (typename PtrType::element_type *dptr)
 
 RW_pointer (PtrType dptr)
 
RW_pointeroperator= (std::nullptr_t)
 
void reset ()
 
void reset (typename PtrType::element_type *dptr)
 
void swap (RW_pointer &rhs)
 
void swap (PtrType &rhs)
 
 operator bool () const
 
const D & operator* () const
 
const D * operator-> () const
 
const D * get () const
 
D & operator* ()
 
D * operator-> ()
 
D * get ()
 
bool unique () const
 
long use_count () const
 
constPtrType getPtr () const
 
PtrType getPtr ()
 
constPtrType cgetPtr ()
 

Private Attributes

PtrType _dptr
 

Related Functions

(Note that these are not member functions.)

template<class D , class DPtr >
std::ostream & operator<< (std::ostream &str, const RW_pointer< D, DPtr > &obj)
 
template<class D , class DPtr >
bool operator== (const RW_pointer< D, DPtr > &lhs, const RW_pointer< D, DPtr > &rhs)
 
template<class D , class DPtr >
bool operator== (const RW_pointer< D, DPtr > &lhs, const typename DPtr::PtrType &rhs)
 
template<class D , class DPtr >
bool operator== (const typename DPtr::PtrType &lhs, const RW_pointer< D, DPtr > &rhs)
 
template<class D , class DPtr >
bool operator== (const RW_pointer< D, DPtr > &lhs, const typename DPtr::constPtrType &rhs)
 
template<class D , class DPtr >
bool operator== (const typename DPtr::constPtrType &lhs, const RW_pointer< D, DPtr > &rhs)
 
template<class D , class DPtr >
bool operator== (const RW_pointer< D, DPtr > &lhs, std::nullptr_t)
 
template<class D , class DPtr >
bool operator== (std::nullptr_t, const RW_pointer< D, DPtr > &rhs)
 
template<class D , class DPtr >
bool operator!= (const RW_pointer< D, DPtr > &lhs, const RW_pointer< D, DPtr > &rhs)
 
template<class D , class DPtr >
bool operator!= (const RW_pointer< D, DPtr > &lhs, const typename DPtr::PtrType &rhs)
 
template<class D , class DPtr >
bool operator!= (const typename DPtr::PtrType &lhs, const RW_pointer< D, DPtr > &rhs)
 
template<class D , class DPtr >
bool operator!= (const RW_pointer< D, DPtr > &lhs, const typename DPtr::constPtrType &rhs)
 
template<class D , class DPtr >
bool operator!= (const typename DPtr::constPtrType &lhs, const RW_pointer< D, DPtr > &rhs)
 
template<class D , class DPtr >
bool operator!= (const RW_pointer< D, DPtr > &lhs, std::nullptr_t)
 
template<class D , class DPtr >
bool operator!= (std::nullptr_t, const RW_pointer< D, DPtr > &rhs)
 

Detailed Description

template<class D, class DTraits = rw_pointer::Shared<D>>
struct zypp::RW_pointer< D, DTraits >

Wrapper for const correct access via Smart pointer types.

zypp::RW_pointer<tt><D,DTraits> stores a Smart pointer types of type DTraits::PtrType, which must be convertible into a D *. Pointer style access (via -> and *) offers a const D * in const a context, otherwise a D *. Thus RW_ means read/write, as you get a different type, dependent on whether you're allowed to read or write.

Forwarding access from an interface to an implemantation class, an RW_pointer prevents const interface methods from accidentally calling nonconst implementation methods.

The second template argument defaults to DTraits = rw_pointer::Shared<D> thus wraping a shared_ptr<D>. To wrap an intrusive_ptr<D> use rw_pointer::Intrusive<D>.

See also
zypp::RWCOW_pointer for 'copy on write' functionality.
class Foo
{
...
private:
// Implementation class
struct Impl;
// Pointer to implementation; actually a shared_ptr<Impl>
RW_pointer<Impl> _pimpl;
void baa() { _pimpl->... } // is Impl *
void baa() const { _pimpl->... } // is Impl const *
};

Definition at line 285 of file PtrTypes.h.

Member Typedef Documentation

◆ PtrType

template<class D, class DTraits = rw_pointer::Shared<D>>
typedef DTraits::PtrType zypp::RW_pointer< D, DTraits >::PtrType

Definition at line 287 of file PtrTypes.h.

◆ constPtrType

template<class D, class DTraits = rw_pointer::Shared<D>>
typedef DTraits::constPtrType zypp::RW_pointer< D, DTraits >::constPtrType

Definition at line 288 of file PtrTypes.h.

Constructor & Destructor Documentation

◆ RW_pointer() [1/4]

template<class D, class DTraits = rw_pointer::Shared<D>>
zypp::RW_pointer< D, DTraits >::RW_pointer ( )
inline

Definition at line 290 of file PtrTypes.h.

◆ RW_pointer() [2/4]

template<class D, class DTraits = rw_pointer::Shared<D>>
zypp::RW_pointer< D, DTraits >::RW_pointer ( std::nullptr_t  )
inline

Definition at line 293 of file PtrTypes.h.

◆ RW_pointer() [3/4]

template<class D, class DTraits = rw_pointer::Shared<D>>
zypp::RW_pointer< D, DTraits >::RW_pointer ( typename PtrType::element_type *  dptr)
inlineexplicit

Definition at line 297 of file PtrTypes.h.

◆ RW_pointer() [4/4]

template<class D, class DTraits = rw_pointer::Shared<D>>
zypp::RW_pointer< D, DTraits >::RW_pointer ( PtrType  dptr)
inlineexplicit

Definition at line 302 of file PtrTypes.h.

Member Function Documentation

◆ operator=()

template<class D, class DTraits = rw_pointer::Shared<D>>
RW_pointer& zypp::RW_pointer< D, DTraits >::operator= ( std::nullptr_t  )
inline

Definition at line 306 of file PtrTypes.h.

◆ reset() [1/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
void zypp::RW_pointer< D, DTraits >::reset ( )
inline

Definition at line 309 of file PtrTypes.h.

◆ reset() [2/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
void zypp::RW_pointer< D, DTraits >::reset ( typename PtrType::element_type *  dptr)
inline

Definition at line 312 of file PtrTypes.h.

◆ swap() [1/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
void zypp::RW_pointer< D, DTraits >::swap ( RW_pointer< D, DTraits > &  rhs)
inline

Definition at line 315 of file PtrTypes.h.

◆ swap() [2/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
void zypp::RW_pointer< D, DTraits >::swap ( PtrType rhs)
inline

Definition at line 318 of file PtrTypes.h.

◆ operator bool()

template<class D, class DTraits = rw_pointer::Shared<D>>
zypp::RW_pointer< D, DTraits >::operator bool ( ) const
inlineexplicit

Definition at line 321 of file PtrTypes.h.

◆ operator*() [1/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
const D& zypp::RW_pointer< D, DTraits >::operator* ( ) const
inline

Definition at line 324 of file PtrTypes.h.

◆ operator->() [1/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
const D* zypp::RW_pointer< D, DTraits >::operator-> ( ) const
inline

Definition at line 327 of file PtrTypes.h.

◆ get() [1/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
const D* zypp::RW_pointer< D, DTraits >::get ( ) const
inline

Definition at line 330 of file PtrTypes.h.

◆ operator*() [2/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
D& zypp::RW_pointer< D, DTraits >::operator* ( )
inline

Definition at line 333 of file PtrTypes.h.

◆ operator->() [2/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
D* zypp::RW_pointer< D, DTraits >::operator-> ( )
inline

Definition at line 336 of file PtrTypes.h.

◆ get() [2/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
D* zypp::RW_pointer< D, DTraits >::get ( )
inline

Definition at line 339 of file PtrTypes.h.

◆ unique()

template<class D, class DTraits = rw_pointer::Shared<D>>
bool zypp::RW_pointer< D, DTraits >::unique ( ) const
inline

Definition at line 343 of file PtrTypes.h.

◆ use_count()

template<class D, class DTraits = rw_pointer::Shared<D>>
long zypp::RW_pointer< D, DTraits >::use_count ( ) const
inline

Definition at line 346 of file PtrTypes.h.

◆ getPtr() [1/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
constPtrType zypp::RW_pointer< D, DTraits >::getPtr ( ) const
inline

Definition at line 349 of file PtrTypes.h.

◆ getPtr() [2/2]

template<class D, class DTraits = rw_pointer::Shared<D>>
PtrType zypp::RW_pointer< D, DTraits >::getPtr ( )
inline

Definition at line 352 of file PtrTypes.h.

◆ cgetPtr()

template<class D, class DTraits = rw_pointer::Shared<D>>
constPtrType zypp::RW_pointer< D, DTraits >::cgetPtr ( )
inline

Definition at line 355 of file PtrTypes.h.

Member Data Documentation

◆ _dptr

template<class D, class DTraits = rw_pointer::Shared<D>>
PtrType zypp::RW_pointer< D, DTraits >::_dptr
private

Definition at line 359 of file PtrTypes.h.


The documentation for this struct was generated from the following file: