64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
// Copyright 2003-2008 Jan Gaspar.
|
|
// Copyright 2013 Paul A. Bristow. Added some Quickbook snippet markers.
|
|
|
|
// Distributed under the Boost Software License, Version 1.0.
|
|
// (See the accompanying file LICENSE_1_0.txt
|
|
// or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
|
|
|
|
//[circular_buffer_example_1
|
|
/*`For all examples, we need this include:
|
|
*/
|
|
|
|
#include <boost/circular_buffer.hpp>
|
|
|
|
//] [/circular_buffer_example_1]
|
|
|
|
int main()
|
|
{
|
|
|
|
//[circular_buffer_example_2
|
|
// Create a circular buffer with a capacity for 3 integers.
|
|
boost::circular_buffer<int> cb(3);
|
|
|
|
// Insert three elements into the buffer.
|
|
cb.push_back(1);
|
|
cb.push_back(2);
|
|
cb.push_back(3);
|
|
|
|
int a = cb[0]; // a == 1
|
|
int b = cb[1]; // b == 2
|
|
int c = cb[2]; // c == 3
|
|
|
|
// The buffer is full now, so pushing subsequent
|
|
// elements will overwrite the front-most elements.
|
|
|
|
cb.push_back(4); // Overwrite 1 with 4.
|
|
cb.push_back(5); // Overwrite 2 with 5.
|
|
|
|
// The buffer now contains 3, 4 and 5.
|
|
a = cb[0]; // a == 3
|
|
b = cb[1]; // b == 4
|
|
c = cb[2]; // c == 5
|
|
|
|
// Elements can be popped from either the front or the back.
|
|
cb.pop_back(); // 5 is removed.
|
|
cb.pop_front(); // 3 is removed.
|
|
|
|
// Leaving only one element with value = 4.
|
|
int d = cb[0]; // d == 4
|
|
|
|
//] [/circular_buffer_example_2]
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
|
|
//[circular_buffer_example_output
|
|
|
|
There is no output from this example.
|
|
|
|
//] [/circular_buffer_example_output]
|
|
|
|
*/
|
|
|