1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@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 #define EIGEN_NO_STATIC_ASSERT
11 #include "main.h"
12
13 template<typename T>
14 struct other_matrix_type
15 {
16 typedef int type;
17 };
18
19 template<typename _Scalar, int _Rows, int _Cols, int _Options, int _MaxRows, int _MaxCols>
20 struct other_matrix_type<Matrix<_Scalar, _Rows, _Cols, _Options, _MaxRows, _MaxCols> >
21 {
22 typedef Matrix<_Scalar, _Rows, _Cols, _Options^RowMajor, _MaxRows, _MaxCols> type;
23 };
24
swap(const MatrixType & m)25 template<typename MatrixType> void swap(const MatrixType& m)
26 {
27 typedef typename other_matrix_type<MatrixType>::type OtherMatrixType;
28 typedef typename MatrixType::Scalar Scalar;
29
30 eigen_assert((!internal::is_same<MatrixType,OtherMatrixType>::value));
31 typename MatrixType::Index rows = m.rows();
32 typename MatrixType::Index cols = m.cols();
33
34 // construct 3 matrix guaranteed to be distinct
35 MatrixType m1 = MatrixType::Random(rows,cols);
36 MatrixType m2 = MatrixType::Random(rows,cols) + Scalar(100) * MatrixType::Identity(rows,cols);
37 OtherMatrixType m3 = OtherMatrixType::Random(rows,cols) + Scalar(200) * OtherMatrixType::Identity(rows,cols);
38
39 MatrixType m1_copy = m1;
40 MatrixType m2_copy = m2;
41 OtherMatrixType m3_copy = m3;
42
43 // test swapping 2 matrices of same type
44 m1.swap(m2);
45 VERIFY_IS_APPROX(m1,m2_copy);
46 VERIFY_IS_APPROX(m2,m1_copy);
47 m1 = m1_copy;
48 m2 = m2_copy;
49
50 // test swapping 2 matrices of different types
51 m1.swap(m3);
52 VERIFY_IS_APPROX(m1,m3_copy);
53 VERIFY_IS_APPROX(m3,m1_copy);
54 m1 = m1_copy;
55 m3 = m3_copy;
56
57 // test swapping matrix with expression
58 m1.swap(m2.block(0,0,rows,cols));
59 VERIFY_IS_APPROX(m1,m2_copy);
60 VERIFY_IS_APPROX(m2,m1_copy);
61 m1 = m1_copy;
62 m2 = m2_copy;
63
64 // test swapping two expressions of different types
65 m1.transpose().swap(m3.transpose());
66 VERIFY_IS_APPROX(m1,m3_copy);
67 VERIFY_IS_APPROX(m3,m1_copy);
68 m1 = m1_copy;
69 m3 = m3_copy;
70
71 // test assertion on mismatching size -- matrix case
72 VERIFY_RAISES_ASSERT(m1.swap(m1.row(0)));
73 // test assertion on mismatching size -- xpr case
74 VERIFY_RAISES_ASSERT(m1.row(0).swap(m1));
75 }
76
test_swap()77 void test_swap()
78 {
79 CALL_SUBTEST_1( swap(Matrix3f()) ); // fixed size, no vectorization
80 CALL_SUBTEST_2( swap(Matrix4d()) ); // fixed size, possible vectorization
81 CALL_SUBTEST_3( swap(MatrixXd(3,3)) ); // dyn size, no vectorization
82 CALL_SUBTEST_4( swap(MatrixXf(30,30)) ); // dyn size, possible vectorization
83 }
84