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Implement boolean reductions for zero-sized objects

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This commit is contained in:
Christoph Hertzberg 2013-11-13 16:47:02 +01:00
parent 8f2d068e84
commit e59b38abef
2 changed files with 32 additions and 7 deletions
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8
Eigen/src/Core/BooleanRedux.h
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@ -29,9 +29,9 @@ struct all_unroller
};
template<typename Derived>
struct all_unroller<Derived, 1>
struct all_unroller<Derived, 0>
{
static inline bool run(const Derived &mat) { return mat.coeff(0, 0); }
static inline bool run(const Derived &/*mat*/) { return true; }
};
template<typename Derived>
@ -55,9 +55,9 @@ struct any_unroller
};
template<typename Derived>
struct any_unroller<Derived, 1>
struct any_unroller<Derived, 0>
{
static inline bool run(const Derived &mat) { return mat.coeff(0, 0); }
static inline bool run(const Derived & /*mat*/) { return false; }
};
template<typename Derived>

31
test/zerosized.cpp
View File

@ -9,12 +9,26 @@
#include "main.h"
template<typename MatrixType> void zeroReduction(const MatrixType& m) {
// Reductions that must hold for zero sized objects
VERIFY(m.all());
VERIFY(!m.any());
VERIFY(m.prod()==1);
VERIFY(m.sum()==0);
VERIFY(m.count()==0);
VERIFY(m.allFinite());
VERIFY(!m.hasNaN());
}
template<typename MatrixType> void zeroSizedMatrix()
{
MatrixType t1;
if (MatrixType::SizeAtCompileTime == Dynamic)
if (MatrixType::SizeAtCompileTime == Dynamic || MatrixType::SizeAtCompileTime == 0)
{
zeroReduction(t1);
if (MatrixType::RowsAtCompileTime == Dynamic)
VERIFY(t1.rows() == 0);
if (MatrixType::ColsAtCompileTime == Dynamic)
@ -22,9 +36,13 @@ template<typename MatrixType> void zeroSizedMatrix()
if (MatrixType::RowsAtCompileTime == Dynamic && MatrixType::ColsAtCompileTime == Dynamic)
{
MatrixType t2(0, 0);
VERIFY(t2.rows() == 0);
VERIFY(t2.cols() == 0);
zeroReduction(t2);
VERIFY(t1==t2);
}
}
}
@ -33,11 +51,15 @@ template<typename VectorType> void zeroSizedVector()
{
VectorType t1;
if (VectorType::SizeAtCompileTime == Dynamic)
if (VectorType::SizeAtCompileTime == Dynamic || VectorType::SizeAtCompileTime==0)
{
zeroReduction(t1);
VERIFY(t1.size() == 0);
VectorType t2(DenseIndex(0)); // DenseIndex disambiguates with 0-the-null-pointer (error with gcc 4.4 and MSVC8)
VERIFY(t2.size() == 0);
zeroReduction(t2);
VERIFY(t1==t2);
}
}
@ -51,9 +73,12 @@ void test_zerosized()
zeroSizedMatrix<Matrix<float, Dynamic, 0, 0, 0, 0> >();
zeroSizedMatrix<Matrix<float, 0, Dynamic, 0, 0, 0> >();
zeroSizedMatrix<Matrix<float, Dynamic, Dynamic, 0, 0, 0> >();
zeroSizedMatrix<Matrix<float, 0, 4> >();
zeroSizedMatrix<Matrix<float, 4, 0> >();
zeroSizedVector<Vector2d>();
zeroSizedVector<Vector3i>();
zeroSizedVector<VectorXf>();
zeroSizedVector<Matrix<float, 0, 1> >();
zeroSizedVector<Matrix<float, 1, 0> >();
}