boost_1_45_0/libs/multi_array/test/reverse_view.cpp

// Copyright 2002 The Trustees of Indiana University.

// Use, modification and distribution is subject to the Boost Software 
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

//  Boost.MultiArray Library
//  Authors: Ronald Garcia
//           Jeremy Siek
//           Andrew Lumsdaine
//  See http://www.boost.org/libs/multi_array for documentation.

//
// reverse_view.cpp - a small test of creating a view with negative strides
//

#include "boost/multi_array.hpp"
#include "boost/test/minimal.hpp"
#include "boost/array.hpp"

int
test_main(int,char*[])
{
  using namespace boost;
  

  // One-dimensional array with views
  double data[] = { 1, 2, 3, 4 };
  double rdata[] = { 4, 3, 2, 1 };

  typedef multi_array< double, 1 > array;
  array A(extents[4]);
  A.assign(data,data+4);
  
  typedef array::index_range range;
  array::array_view<1>::type B = A[indices[range(3, -1, -1)]];
  
  for(multi_array_types::size_type i = 0; i != B.size(); ++i) {
    BOOST_CHECK(B[i] == rdata[i]);
  }
  
  return boost::exit_success;
}