Can I push a smart pointer to a list of smart pointers?

Question

I have the following code:

class MarchingEvent
{
...
};

typedef std::list< std::shared_ptr<MarchingEvent> > Segment;

Can I do:

void myFunction(std::shared_ptr<MarchingEvent> A)
{
    Segment segment;
    segment.push_back( A ); // <- Questionable line.
}

Will my smart pointer be correctly incremented when pushing A to segment?

Answer 1

Will my smart pointer be correctly incremented when pushing A to segment?

Yes. That's what std::shared_ptr is supposed to do.

Note, however, that if you don't use the object A after the call to push_back, you might want to change the last line to

segment.push_back(std::move(A));

to move-construct the element in segment instead of copying it - the copying has already been done upon entry of the function, because A is passed by value.