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(C++) shared_ptr.hpp: Cannot convert 'Y *' to 'Widget *'

Compile error.

Full error message

[C++ Error] shared_ptr.hpp(124): E2034 Cannot convert 'Y *' to 'Widget *'

Cause

IDE: C++ Builder 6.0

Compiler: Borland BCC32.EXE version 6.0.10.157

Boost version: 1.35.0.

A boost::shared_ptr is either uninitialized or initialized with a pointer. Initializing with 0 is not a valid initialization and therefore not possible.

#include <boost/shared_ptr.hpp>

int main()

{

boost::shared_ptr<Widget> w(0); //ERROR! Cannot initialize with 0

//Should be the code below:

//boost::shared_ptr<Widget> w(new Widget);

}

Solution

Initialize the boost::shared_ptr.

#include <boost/shared_ptr.hpp>

int main()

{

boost::shared_ptr<Widget> w(new Widget);

}

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