Re: [boost] [smart_ptr] make_shared usage

Daniel Frey:

Hi,

I have a question on make_shared. Consider a class which intends to force all instances to be handled via a shared_ptr. I used to do this by putting the ctors into the private section and adding static create()-methods in the public section. Example:

class X { private: X( int, double );

public: static shared_ptr<X> create( int i, double d ) { return shared_ptr<X>( new X( i, d ) ); } };

Replacing the returned expression with make_shared<X>( i, d ) wouldn't work, since it requires a public ctor.

You should be able to make it work by making the appropriate make_shared overload a friend: template< class T, class A1, class A2 > friend boost::shared_ptr< T > boost::make_shared( A1 const & a1, A2 const & a2 );