Destructor is called when I push_back to the vector

Question

I have this class definition:

class FlashStream
{
public:
    explicit FlashStream(const char * url, vector * headers, vector * dat         


        

Answer 1

This statement:

_streams.push_back(FlashStream(url, headers, data, _npp.ndata, notifyData, lastModified));

is equivalent to:

{
    FlashStream temp(url, headers, data, _npp.ndata, notifyData, lastModified);
    _streams.push_back(temp);
    // temp gets destroyed here
}

so, you create a temporary FlashStream object that is copied into the vector, then destructed afterwards. You can avoid this by using emplace_back() in C++11:

_streams.emplace_back(url, headers, data, _npp.ndata, notifyData, lastModified);