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// 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.
//
// slice.cpp - testing out slicing on a matrices
//
#include "generative_tests.hpp"
#include <boost/array.hpp>
#include <boost/mpl/if.hpp>
#include <boost/type_traits/is_same.hpp>
template <typename Array>
struct view_traits_mutable {
public:
#if 0 // RG - MSVC can't handle templates nested in templates. Use traits
typedef typename Array::template array_view<3>::type array_view3;
typedef typename Array::template array_view<2>::type array_view2;
#endif
typedef typename boost::array_view_gen<Array,3>::type array_view3;
typedef typename boost::array_view_gen<Array,2>::type array_view2;
};
template <typename Array>
struct view_traits_const {
#if 0 // RG - MSVC can't handle templates nested in templates. Use traits
typedef typename Array::template const_array_view<3>::type array_view3;
typedef typename Array::template const_array_view<2>::type array_view2;
#endif
typedef typename boost::const_array_view_gen<Array,3>::type array_view3;
typedef typename boost::const_array_view_gen<Array,2>::type array_view2;
};
// Meta-program selects the proper view_traits implementation.
template <typename Array, typename ConstTag>
struct view_traits_generator :
boost::mpl::if_< boost::is_same<ConstTag,const_array_tag>,
view_traits_const<Array>,
view_traits_mutable<Array> >
{};
template <typename Array, typename ViewTraits>
void test_views(Array& A, const ViewTraits&) {
typedef typename Array::index index;
typedef typename Array::index_range range;
typename Array::index_gen indices;
const index idx0 = A.index_bases()[0];
const index idx1 = A.index_bases()[1];
const index idx2 = A.index_bases()[2];
// Standard View
{
typename ViewTraits::array_view3 B = A[
indices[range(idx0+0,idx0+2)]
[range(idx1+1,idx1+3)]
[range(idx2+0,idx2+4,2)]
];
for (index i = 0; i != 2; ++i)
for (index j = 0; j != 2; ++j)
for (index k = 0; k != 2; ++k) {
BOOST_TEST(B[i][j][k] == A[idx0+i][idx1+j+1][idx2+k*2]);
boost::array<index,3> elmts;
elmts[0]=i; elmts[1]=j; elmts[2]=k;
BOOST_TEST(B(elmts) == A[idx0+i][idx1+j+1][idx2+k*2]);
}
}
// Degenerate dimensions
{
typename ViewTraits::array_view2 B =
A[indices[range(idx0+0,idx0+2)][idx1+1][range(idx2+0,idx2+4,2)]];
for (index i = 0; i != 2; ++i)
for (index j = 0; j != 2; ++j) {
BOOST_TEST(B[i][j] == A[idx0+i][idx1+1][idx2+j*2]);
boost::array<index,2> elmts;
elmts[0]=i; elmts[1]=j;
BOOST_TEST(B(elmts) == A[idx0+i][idx1+1][idx2+j*2]);
}
}
// Flip the third dimension
{
typename ViewTraits::array_view3 B = A[
indices[range(idx0+0,idx0+2)]
[range(idx1+0,idx1+2)]
[range(idx2+2,idx2+0,-1)]
];
// typename ViewTraits::array_view3 B =
// A[indices[range(idx0+0,idx0+2)][idx1+1][range(idx2+0,idx2+4,2)]];
for (index i = 0; i != 2; ++i)
for (index j = 0; j != 2; ++j)
for (index k = 0; k != 2; ++k) {
BOOST_TEST(B[i][j][k] == A[idx0+i][idx1+j][idx2+2-k]);
boost::array<index,3> elmts;
elmts[0]=i; elmts[1]=j; elmts[2]=k;
BOOST_TEST(B(elmts) == A[idx0+i][idx1+j][idx2+2-k]);
}
}
++tests_run;
}
template <typename Array>
void access(Array& A, const mutable_array_tag&) {
assign(A);
typedef typename view_traits_generator<Array,mutable_array_tag>::type
m_view_traits;
typedef typename view_traits_generator<Array,const_array_tag>::type
c_view_traits;
test_views(A,m_view_traits());
test_views(A,c_view_traits());
const Array& CA = A;
test_views(CA,c_view_traits());
}
template <typename Array>
void access(Array& A, const const_array_tag&) {
typedef typename view_traits_generator<Array,const_array_tag>::type
c_view_traits;
test_views(A,c_view_traits());
}
int main() {
return run_generative_tests();
}
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