On 09/14/2011 07:01 PM, shri kumar wrote:
Hi,
I am facing a problem while making the raw pointer to an intrusive_ptr inside a map whose pointer is already an intrusive pointer so typedef goes like:
typedef boost::intrusive_ptr< protocolLibraryLoader> ProtocolLibraryLoaderPtr;
typedef std::pair<ProtocolLibraryLoaderPtr, ProtocolRecognizer_type*> ProtocolLibEnginePair;
typedef boost::intrusive_ptr<ProtocolLibEnginePair> ProtocolLibEnginePairPtr;
Now inside code when I try creating map and assign with ptr as given in below:
*boost::intrusive_ptr<protocolLibraryLoader> libraryLoader = getProtoLoader();*
m_activeRecEnginePtr = ProtocolLibEnginePairPtr(libraryLoader,newRecognizer);
I get the following error:
ProtocolManager.cpp: In member function 'void ProtocolManager::InitializeProtocolsLibrary(ProtocolManager*)':
ProtocolManager.cpp:234: error: no matching function for call to 'boost::intrusive_ptr<std::pair<boost::intrusive_ptr<protocolLibraryLoader>, ProtocolRecognizer_type*>
::intrusive_ptr(boost::intrusive_ptr<protocolLibraryLoader>&, ProtocolRecognizer_type*&)'
I wonder if it is kind of limitation or do I have to do something else to achieve?
Actually I am dealing with legacy code so I don't want to remove the intrusiveness on the pair which actually increases/decreases ref_count of ProtocolRecognizer_type and not on protocolLibraryLoader.
I'm not sure I understood what you're trying to do but the compiler basically says that it can't construct intrusive_ptr from two arguments. You seem to have confused intrusive_ptr with std::pair. Furthermore, it seems odd to have intrusive_ptr on std::pair because std::pair doesn't provide reference counting. You probably ether need shared_ptr instead of intrusive_ptr or: typedef std::pair< ProtocolLibraryLoaderPtr, boost::intrusive_ptr<ProtocolRecognizer_type>
ProtocolLibEnginePair;
PS: And this thread is probably better suited for users' list.