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/***************************************************************************
* Copyright (c) Johan Mabille, Sylvain Corlay and Wolf Vollprecht *
* Copyright (c) QuantStack *
* *
* Distributed under the terms of the BSD 3-Clause License. *
* *
* The full license is in the file LICENSE, distributed with this software. *
****************************************************************************/
#include "xtensor/xarray.hpp"
#include "xtensor/xbroadcast.hpp"
#include "test_common.hpp"
namespace xt
{
TEST(xbroadcast, broadcast)
{
xarray<double> m1{{1, 2, 3}, {4, 5, 6}};
auto m1_broadcast = broadcast(m1, {1, 2, 3});
ASSERT_EQ(1.0, m1_broadcast(0, 0, 0));
ASSERT_EQ(4.0, m1_broadcast(0, 1, 0));
ASSERT_EQ(5.0, m1_broadcast(0, 1, 1));
ASSERT_EQ(m1_broadcast.layout(), m1.layout());
XT_EXPECT_ANY_THROW(m1_broadcast.at(0, 0, 0, 0));
XT_EXPECT_ANY_THROW(m1_broadcast.at(10, 10, 10));
auto shape = std::vector<std::size_t>{1, 2, 3};
auto m1_broadcast2 = broadcast(m1, shape);
ASSERT_EQ(1.0, m1_broadcast2(0, 0, 0));
ASSERT_EQ(4.0, m1_broadcast2(0, 1, 0));
ASSERT_EQ(5.0, m1_broadcast2(0, 1, 1));
xarray<double> m1_assigned = m1_broadcast;
ASSERT_EQ(5.0, m1_assigned(0, 1, 1));
}
TEST(xbroadcast, fixed_shape)
{
xarray<double> m = {{1, 2, 3}, {4, 5, 6}};
auto m_br = broadcast(m, xt::fixed_shape<1, 2, 3>());
ASSERT_EQ(1.0, m_br(0, 0, 0));
ASSERT_EQ(4.0, m_br(0, 1, 0));
ASSERT_EQ(5.0, m_br(0, 1, 1));
ASSERT_EQ(m_br.layout(), m.layout());
XT_EXPECT_ANY_THROW(m_br.at(0, 0, 0, 0));
XT_EXPECT_ANY_THROW(m_br.at(10, 10, 10));
}
TEST(xbroadcast, element)
{
xarray<double> m1{{1, 2, 3}, {4, 5, 6}};
auto m1_broadcast = broadcast(m1, {4, 2, 3});
// access with the right number of arguments
std::array<std::size_t, 3> index1 = {0, 1, 1};
ASSERT_EQ(5.0, m1_broadcast.element(index1.begin(), index1.end()));
// too many arguments = using the last ones only
std::array<std::size_t, 4> index3 = {4, 0, 1, 1};
ASSERT_EQ(5.0, m1_broadcast.element(index3.begin(), index3.end()));
}
TEST(xbroadcast, indexed_access)
{
xarray<double> m1{{1, 2, 3}, {4, 5, 6}};
auto m1_broadcast = broadcast(m1, {4, 2, 3});
std::array<std::size_t, 3> index1 = {0, 1, 1};
ASSERT_EQ(5.0, m1_broadcast[index1]);
ASSERT_EQ(5.0, (m1_broadcast[{0, 1, 1}]));
std::array<std::size_t, 4> index3 = {4, 0, 1, 1};
ASSERT_EQ(5.0, m1_broadcast[index3]);
ASSERT_EQ(5.0, (m1_broadcast[{4, 0, 1, 1}]));
}
TEST(xbroadcast, shape_forwarding)
{
std::array<std::size_t, 2> bc_shape{3, 3};
auto m1_broadcast = broadcast(123, bc_shape);
ASSERT_EQ(m1_broadcast(0, 0), 123);
}
TEST(xbroadcast, xiterator)
{
xarray<int> m1 = {1, 2, 3};
auto m1_broadcast = broadcast(m1, {2, 3});
size_t nb_iter = 3;
using shape_type = std::vector<size_t>;
// broadcast_iterator
{
auto iter = m1_broadcast.template begin<layout_type::row_major>();
auto iter_end = m1_broadcast.template end<layout_type::row_major>();
for (size_t i = 0; i < nb_iter; ++i)
{
++iter;
}
EXPECT_EQ(1, *iter);
for (size_t i = 0; i < nb_iter; ++i)
{
++iter;
}
EXPECT_EQ(iter, iter_end);
}
// shaped_xiterator
{
shape_type shape = {2, 2, 3};
auto iter = m1_broadcast.template begin<layout_type::row_major>(shape);
auto iter_end = m1_broadcast.template end<layout_type::row_major>(shape);
for (size_t i = 0; i < 2 * nb_iter; ++i)
{
++iter;
}
EXPECT_EQ(1, *iter);
for (size_t i = 0; i < 2 * nb_iter; ++i)
{
++iter;
}
EXPECT_EQ(iter, iter_end);
}
}
TEST(xbroadcast, reverse_xiterator)
{
xarray<int> m1 = {1, 2, 3};
auto m1_broadcast = broadcast(m1, {2, 3});
size_t nb_iter = 3;
using shape_type = std::vector<size_t>;
// reverse_broadcast_iterator
{
auto iter = m1_broadcast.template rbegin<layout_type::row_major>();
auto iter_end = m1_broadcast.template rend<layout_type::row_major>();
for (size_t i = 0; i < nb_iter; ++i)
{
++iter;
}
EXPECT_EQ(3, *iter);
for (size_t i = 0; i < nb_iter; ++i)
{
++iter;
}
EXPECT_EQ(iter, iter_end);
}
// reverse_shaped_xiterator
{
shape_type shape = {2, 2, 3};
auto iter = m1_broadcast.template rbegin<layout_type::row_major>(shape);
auto iter_end = m1_broadcast.template rend<layout_type::row_major>(shape);
for (size_t i = 0; i < 2 * nb_iter; ++i)
{
++iter;
}
EXPECT_EQ(3, *iter);
for (size_t i = 0; i < 2 * nb_iter; ++i)
{
++iter;
}
EXPECT_EQ(iter, iter_end);
}
}
TEST(xbroadcast, same_shape)
{
xt::xarray<double, xt::layout_type::column_major> arr{{0.0, 1.0, 2.0}, {10.0, 11.0, 12.0}};
auto t = xt::broadcast(arr, {2, 3});
xt::xarray<double, xt::layout_type::column_major> cm_arr = t;
xt::xarray<double, xt::layout_type::row_major> rm_arr = t;
EXPECT_TRUE(xt::allclose(rm_arr, cm_arr));
EXPECT_EQ(cm_arr(0, 0), 0.0);
EXPECT_EQ(cm_arr(0, 1), 1.0);
EXPECT_EQ(cm_arr(0, 2), 2.0);
EXPECT_EQ(cm_arr(1, 0), 10.0);
EXPECT_EQ(cm_arr(1, 1), 11.0);
EXPECT_EQ(cm_arr(1, 2), 12.0);
}
}
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