Mixing boost smart pointers and C++11 smart pointers in boost::signals2

Question

I have an application which uses boost::signals2 to communicate between components. I am trying to use it's automatic connection management features through slot_type(...).track(weak_ptr).

The problem:

Throughout my program, std::shared_ptr is used. .track expects a boost::weak_ptr, and I am providing an std::weak_ptr.

Here's the exact error I'm getting:

cannot convert argument 1 from 'std::weak_ptr<_Ty>' to 'const boost::weak_ptr<void> &'

Is there a workaround for this? Or have I misunderstood the problem?

Related/possibly helpful: [cohabitation of boost::shared_ptr and std::shared_ptr](http://stackoverflow.com/questions/12314967/cohabitation-of-boostshared-ptr-and-stdshared-ptr) — user2802841, Mar 16 '14 at 23:28

score 8 · Accepted Answer · answered Mar 16 '14 at 23:29

8

I found a solution, and it was to use .track_foreign instead of .track. It allows the use of C++11 smart pointers in place of the boost smart pointers.

answered Mar 16 '14 at 23:29

OMGtechy

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score 0 · Answer 2 · answered Mar 16 '14 at 23:27

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To the eyes of C++, and the compiler, std::weak_ptr and boost::weak_ptr are two completely different classes that has nothing in common. Therefore, when you are using boost::signals2 I'd suggest you to stick with boost::weak_ptr.

answered Mar 16 '14 at 23:27

Shoe

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Just found a solution, but yes that was what I was thinking too. Writing up my answer now. – OMGtechy Mar 16 '14 at 23:28

Mixing boost smart pointers and C++11 smart pointers in boost::signals2

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