How to get element from circular_buffer

Question

I am using boost library in MAC (xcode). I have two questions about boost::circular_buffer.

1 - I am getting syntax error when dec

Answer 1

boost::circular_buffer::front() gives you a reference to the element at the "front", while boost::circular_buffer::pop_front() will remove that element.

boost::circular_buffer::back() gives you a reference to the element at the back, while boost::circular_buffer::pop_back() removes that element.

It appears your syntax error is resulting from the most vexing parse. Try instead:

boost::circular_buffer cb;
cb.set_capacity(10); 

Or more succinctly:

boost::circular_buffer cb((10));