ground/gcs/src/libs/eigen/test/zerosized.cpp

   1 // This file is part of Eigen, a lightweight C++ template library
   2 // for linear algebra.
   3 //
   4 // Copyright (C) 2011 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 #include "main.h"
  11
  12
  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.count()==0);
  20   VERIFY(m.allFinite());
  21   VERIFY(!m.hasNaN());
  22 }
  23
  24
  25 template<typename MatrixType> void zeroSizedMatrix()
  26 {
  27   MatrixType t1;
  28
  29   if (MatrixType::SizeAtCompileTime == Dynamic || MatrixType::SizeAtCompileTime == 0)
  30   {
  31     zeroReduction(t1);
  32     if (MatrixType::RowsAtCompileTime == Dynamic)
  33       VERIFY(t1.rows() == 0);
  34     if (MatrixType::ColsAtCompileTime == Dynamic)
  35       VERIFY(t1.cols() == 0);
  36
  37     if (MatrixType::RowsAtCompileTime == Dynamic && MatrixType::ColsAtCompileTime == Dynamic)
  38     {
  39
  40       MatrixType t2(0, 0);
  41       VERIFY(t2.rows() == 0);
  42       VERIFY(t2.cols() == 0);
  43
  44       zeroReduction(t2);
  45       VERIFY(t1==t2);
  46     }
  47   }
  48 }
  49
  50 template<typename VectorType> void zeroSizedVector()
  51 {
  52   VectorType t1;
  53
  54   if (VectorType::SizeAtCompileTime == Dynamic || VectorType::SizeAtCompileTime==0)
  55   {
  56     zeroReduction(t1);
  57     VERIFY(t1.size() == 0);
  58     VectorType t2(DenseIndex(0)); // DenseIndex disambiguates with 0-the-null-pointer (error with gcc 4.4 and MSVC8)
  59     VERIFY(t2.size() == 0);
  60     zeroReduction(t2);
  61
  62     VERIFY(t1==t2);
  63   }
  64 }
  65
  66 void test_zerosized()
  67 {
  68   zeroSizedMatrix<Matrix2d>();
  69   zeroSizedMatrix<Matrix3i>();
  70   zeroSizedMatrix<Matrix<float, 2, Dynamic> >();
  71   zeroSizedMatrix<MatrixXf>();
  72   zeroSizedMatrix<Matrix<float, 0, 0> >();
  73   zeroSizedMatrix<Matrix<float, Dynamic, 0, 0, 0, 0> >();
  74   zeroSizedMatrix<Matrix<float, 0, Dynamic, 0, 0, 0> >();
  75   zeroSizedMatrix<Matrix<float, Dynamic, Dynamic, 0, 0, 0> >();
  76   zeroSizedMatrix<Matrix<float, 0, 4> >();
  77   zeroSizedMatrix<Matrix<float, 4, 0> >();
  78
  79   zeroSizedVector<Vector2d>();
  80   zeroSizedVector<Vector3i>();
  81   zeroSizedVector<VectorXf>();
  82   zeroSizedVector<Matrix<float, 0, 1> >();
  83   zeroSizedVector<Matrix<float, 1, 0> >();
  84 }