Boost fusion and runtime collection growing

Question

I have

boost::fusion::vector<> args;
args = boost::fusion::push_back(args, 100);
std::cout << boost::fusion::size(args) << std::endl;

The cout shows me size equals to 0.

View code here: cpp.sh/3xcwsi

Can I have any non associative boost fusion container which can be altered at runtime and stored at the same variable?

Answer 1

No. The whole concept of the Fusion Library deals in statically typed “containers” - actually just abstractions over sequences.

What you are looking for is likely in the Boost Container library though. It has stable_vector, static_vector and small_vector, among others.

These van also be used to underly ordered/associative containers from Boost Container