zypp::NullDeleter Struct Reference

shared_ptr custom deleter doing nothing. More...

#include <zypp-core/base/PtrTypes.h>

Public Member Functions
void	operator() (const void *const) const

Detailed Description

shared_ptr custom deleter doing nothing.

A custom deleter is a function being called when the last shared_ptr goes out of score. Per default the object gets deleted, but you can insall custom deleters as well. This one does nothing.

 // Some class providing a std::istream
 struct InpuStream
{
  // Per deafult use std::cin.
  InputStream()
  : _stream( &std::cin, NullDeleter() )
  {}
  // Or read from a file.
  InputStream( const Pathname & file_r )
  : _stream( new ifgzstream( _path.asString().c_str() ) )
  {}
  // Or use a stream priovided by the application.
  InputStream( std::istream & stream_r )
  : _stream( &stream_r, NullDeleter() )
  {}
 
  std::istream & stream()
  { return *_stream; }
 
private:
  shared_ptr<std::istream> _stream;
};

Definition at line 83 of file PtrTypes.h.

Member Function Documentation

operator()()

void zypp::NullDeleter::operator() ( const void * const ) const

inline

Definition at line 85 of file PtrTypes.h.

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

• zypp-core/base/PtrTypes.h