Re: [boost] [shifted_ptr] Documentation

10 Apr 2011


      On 4/9/2011 1:27 PM, Phil Bouchard wrote:
...
py->p_.reset( new shifted<A>() ); // heap allocation #4
In fact reset() should be an affectator:
#include <iostream>

#include <boost/shifted_ptr.hpp>
#include <boost/shifted_allocator.hpp>


using namespace std;
using namespace boost;


struct A
{
	shifted_ptr<A> p;
	
	~A() { std::cout << __FUNCTION__ << std::endl; }
};

struct X
{
	std::vector< shifted_ptr<A>, shifted_allocator< shifted_ptr<A> > > v_;

	~X() { std::cout << __FUNCTION__ << std::endl; }
};

struct Y
{
	shifted_ptr<A> p_;

	~Y() { std::cout << __FUNCTION__ << std::endl; }
};


int main()
{
	shifted_ptr<X> px = new shifted<X>(); // heap allocation #1
	px->v_.reserve( 5 ); // heap allocation #2
	shifted_ptr<Y> py = new shifted<Y>(); // heap allocation #3
	py->p_ = new shifted<A>(); // heap allocation #4
	px->v_.push_back( py->p_ ); // no heap allocation #5
}


Outputs:
~Y
~A
~X


Thanks,
-Phil