ceph/src/boost/libs/multi_array/test/reverse_view.cpp

   1 // Copyright 2002 The Trustees of Indiana University.
   2
   3 // Use, modification and distribution is subject to the Boost Software
   4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6
   7 //  Boost.MultiArray Library
   8 //  Authors: Ronald Garcia
   9 //           Jeremy Siek
  10 //           Andrew Lumsdaine
  11 //  See http://www.boost.org/libs/multi_array for documentation.
  12
  13 //
  14 // reverse_view.cpp - a small test of creating a view with negative strides
  15 //
  16
  17 #include <boost/multi_array.hpp>
  18 #include <boost/core/lightweight_test.hpp>
  19 #include <boost/array.hpp>
  20
  21 int
  22 main()
  23 {
  24   using namespace boost;
  25
  26
  27   // One-dimensional array with views
  28   double data[] = { 1, 2, 3, 4 };
  29   double rdata[] = { 4, 3, 2, 1 };
  30
  31   typedef multi_array< double, 1 > array;
  32   array A(extents[4]);
  33   A.assign(data,data+4);
  34
  35   typedef array::index_range range;
  36   array::array_view<1>::type B = A[indices[range(3, -1, -1)]];
  37
  38   for(multi_array_types::size_type i = 0; i != B.size(); ++i) {
  39     BOOST_TEST(B[i] == rdata[i]);
  40   }
  41
  42   return boost::report_errors();
  43 }