cxx11_tensor_move.cpp
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1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2017 Viktor Csomor <viktor.csomor@gmail.com>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9 
10 #include "main.h"
11 
12 #include <Eigen/CXX11/Tensor>
13 #include <utility>
14 
15 using Eigen::Tensor;
16 using Eigen::RowMajor;
17 
18 static void calc_indices(int i, int& x, int& y, int& z)
19 {
20  x = i / 4;
21  y = (i % 4) / 2;
22  z = i % 2;
23 }
24 
25 static void test_move()
26 {
27  int x;
28  int y;
29  int z;
30 
31  Tensor<int,3> tensor1(2, 2, 2);
32  Tensor<int,3,RowMajor> tensor2(2, 2, 2);
33 
34  for (int i = 0; i < 8; i++)
35  {
36  calc_indices(i, x, y, z);
37  tensor1(x,y,z) = i;
38  tensor2(x,y,z) = 2 * i;
39  }
40 
41  // Invokes the move constructor.
42  Tensor<int,3> moved_tensor1 = std::move(tensor1);
43  Tensor<int,3,RowMajor> moved_tensor2 = std::move(tensor2);
44 
45  VERIFY_IS_EQUAL(tensor1.size(), 0);
46  VERIFY_IS_EQUAL(tensor2.size(), 0);
47 
48  for (int i = 0; i < 8; i++)
49  {
50  calc_indices(i, x, y, z);
51  VERIFY_IS_EQUAL(moved_tensor1(x,y,z), i);
52  VERIFY_IS_EQUAL(moved_tensor2(x,y,z), 2 * i);
53  }
54 
55  Tensor<int,3> moved_tensor3(2,2,2);
56  Tensor<int,3,RowMajor> moved_tensor4(2,2,2);
57 
58  moved_tensor3.setZero();
59  moved_tensor4.setZero();
60 
61  // Invokes the move assignment operator.
62  moved_tensor3 = std::move(moved_tensor1);
63  moved_tensor4 = std::move(moved_tensor2);
64 
65  for (int i = 0; i < 8; i++)
66  {
67  calc_indices(i, x, y, z);
68  VERIFY_IS_EQUAL(moved_tensor3(x,y,z), i);
69  VERIFY_IS_EQUAL(moved_tensor4(x,y,z), 2 * i);
70  }
71 }
72 
73 EIGEN_DECLARE_TEST(cxx11_tensor_move)
74 {
76 }
static void calc_indices(int i, int &x, int &y, int &z)
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Index size() const
Definition: Tensor.h:103
EIGEN_DECLARE_TEST(cxx11_tensor_move)
Scalar * y
static void test_move()
#define VERIFY_IS_EQUAL(a, b)
Definition: main.h:386
#define CALL_SUBTEST(FUNC)
Definition: main.h:399
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EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Tensor< Scalar_, NumIndices_, Options_, IndexType_ > & setZero()
Definition: TensorBase.h:988
The tensor class.
Definition: Tensor.h:63


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autogenerated on Tue Jul 4 2023 02:34:08