| 1 | // Copyright 2002 The Trustees of Indiana University. |
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| 2 | |
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| 3 | // Use, modification and distribution is subject to the Boost Software |
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| 4 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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| 5 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | |
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| 7 | // Boost.MultiArray Library |
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| 8 | // Authors: Ronald Garcia |
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| 9 | // Jeremy Siek |
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| 10 | // Andrew Lumsdaine |
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| 11 | // See http://www.boost.org/libs/multi_array for documentation. |
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| 12 | |
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| 13 | // |
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| 14 | // reverse_view.cpp - a small test of creating a view with negative strides |
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| 15 | // |
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| 16 | |
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| 17 | #include <boost/multi_array.hpp> |
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| 18 | #include <boost/core/lightweight_test.hpp> |
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| 19 | #include <boost/array.hpp> |
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| 20 | |
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| 21 | int |
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| 22 | main() |
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| 23 | { |
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| 24 | using namespace boost; |
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| 25 | |
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| 26 | |
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| 27 | // One-dimensional array with views |
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| 28 | double data[] = { 1, 2, 3, 4 }; |
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| 29 | double rdata[] = { 4, 3, 2, 1 }; |
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| 30 | |
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| 31 | typedef multi_array< double, 1 > array; |
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| 32 | array A(extents[4]); |
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| 33 | A.assign(begin: data,end: data+4); |
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| 34 | |
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| 35 | typedef array::index_range range; |
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| 36 | array::array_view<1>::type B = A[indices[range(3, -1, -1)]]; |
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| 37 | |
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| 38 | for(multi_array_types::size_type i = 0; i != B.size(); ++i) { |
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| 39 | BOOST_TEST(B[i] == rdata[i]); |
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| 40 | } |
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| 41 | |
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| 42 | return boost::report_errors(); |
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| 43 | } |
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| 44 | |
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