xref: /aosp_15_r20/external/eigen/test/zerosized.cpp (revision bf2c37156dfe67e5dfebd6d394bad8b2ab5804d4)
1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2011 Benoit Jacob <[email protected]>
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 
zeroReduction(const MatrixType & m)13 template<typename MatrixType> void zeroReduction(const MatrixType& m) {
14   // Reductions that must hold for zero sized objects
15   VERIFY(m.all());
16   VERIFY(!m.any());
17   VERIFY(m.prod()==1);
18   VERIFY(m.sum()==0);
19   VERIFY(m.norm()==0);
20   VERIFY(m.squaredNorm()==0);
21   VERIFY(m.count()==0);
22   VERIFY(m.allFinite());
23   VERIFY(!m.hasNaN());
24   VERIFY_RAISES_ASSERT( m.minCoeff() );
25   VERIFY_RAISES_ASSERT( m.maxCoeff() );
26   Index i,j;
27   VERIFY_RAISES_ASSERT( m.minCoeff(&i,&j) );
28   VERIFY_RAISES_ASSERT( m.maxCoeff(&i,&j) );
29   VERIFY_RAISES_ASSERT( m.reshaped().minCoeff(&i) );
30   VERIFY_RAISES_ASSERT( m.reshaped().maxCoeff(&i) );
31 }
32 
33 
zeroSizedMatrix()34 template<typename MatrixType> void zeroSizedMatrix()
35 {
36   MatrixType t1;
37   typedef typename MatrixType::Scalar Scalar;
38 
39   if (MatrixType::SizeAtCompileTime == Dynamic || MatrixType::SizeAtCompileTime == 0)
40   {
41     zeroReduction(t1);
42     if (MatrixType::RowsAtCompileTime == Dynamic)
43       VERIFY(t1.rows() == 0);
44     if (MatrixType::ColsAtCompileTime == Dynamic)
45       VERIFY(t1.cols() == 0);
46 
47     if (MatrixType::RowsAtCompileTime == Dynamic && MatrixType::ColsAtCompileTime == Dynamic)
48     {
49 
50       MatrixType t2(0, 0), t3(t1);
51       VERIFY(t2.rows() == 0);
52       VERIFY(t2.cols() == 0);
53 
54       zeroReduction(t2);
55       VERIFY(t1==t2);
56     }
57   }
58 
59   if(MatrixType::MaxColsAtCompileTime!=0 && MatrixType::MaxRowsAtCompileTime!=0)
60   {
61     Index rows = MatrixType::RowsAtCompileTime==Dynamic ? internal::random<Index>(1,10) : Index(MatrixType::RowsAtCompileTime);
62     Index cols = MatrixType::ColsAtCompileTime==Dynamic ? internal::random<Index>(1,10) : Index(MatrixType::ColsAtCompileTime);
63     MatrixType m(rows,cols);
64     zeroReduction(m.template block<0,MatrixType::ColsAtCompileTime>(0,0,0,cols));
65     zeroReduction(m.template block<MatrixType::RowsAtCompileTime,0>(0,0,rows,0));
66     zeroReduction(m.template block<0,1>(0,0));
67     zeroReduction(m.template block<1,0>(0,0));
68     Matrix<Scalar,Dynamic,Dynamic> prod = m.template block<MatrixType::RowsAtCompileTime,0>(0,0,rows,0) * m.template block<0,MatrixType::ColsAtCompileTime>(0,0,0,cols);
69     VERIFY(prod.rows()==rows && prod.cols()==cols);
70     VERIFY(prod.isZero());
71     prod = m.template block<1,0>(0,0) * m.template block<0,1>(0,0);
72     VERIFY(prod.size()==1);
73     VERIFY(prod.isZero());
74   }
75 }
76 
zeroSizedVector()77 template<typename VectorType> void zeroSizedVector()
78 {
79   VectorType t1;
80 
81   if (VectorType::SizeAtCompileTime == Dynamic || VectorType::SizeAtCompileTime==0)
82   {
83     zeroReduction(t1);
84     VERIFY(t1.size() == 0);
85     VectorType t2(DenseIndex(0)); // DenseIndex disambiguates with 0-the-null-pointer (error with gcc 4.4 and MSVC8)
86     VERIFY(t2.size() == 0);
87     zeroReduction(t2);
88 
89     VERIFY(t1==t2);
90   }
91 }
92 
EIGEN_DECLARE_TEST(zerosized)93 EIGEN_DECLARE_TEST(zerosized)
94 {
95   zeroSizedMatrix<Matrix2d>();
96   zeroSizedMatrix<Matrix3i>();
97   zeroSizedMatrix<Matrix<float, 2, Dynamic> >();
98   zeroSizedMatrix<MatrixXf>();
99   zeroSizedMatrix<Matrix<float, 0, 0> >();
100   zeroSizedMatrix<Matrix<float, Dynamic, 0, 0, 0, 0> >();
101   zeroSizedMatrix<Matrix<float, 0, Dynamic, 0, 0, 0> >();
102   zeroSizedMatrix<Matrix<float, Dynamic, Dynamic, 0, 0, 0> >();
103   zeroSizedMatrix<Matrix<float, 0, 4> >();
104   zeroSizedMatrix<Matrix<float, 4, 0> >();
105 
106   zeroSizedVector<Vector2d>();
107   zeroSizedVector<Vector3i>();
108   zeroSizedVector<VectorXf>();
109   zeroSizedVector<Matrix<float, 0, 1> >();
110   zeroSizedVector<Matrix<float, 1, 0> >();
111 }
112