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Fix infinite recursion in ProductBase::coeff() (bug #447)

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Triggered by product of dynamic-size 1 x n and n x 1 matrices.
Also, add regression test.
This commit is contained in:
Jitse Niesen 2012-04-18 15:23:28 +01:00
parent 5cab18976b
commit 57b5767fe2
2 changed files with 24 additions and 2 deletions
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6
Eigen/src/Core/ProductBase.h
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@ -154,7 +154,8 @@ class ProductBase : public MatrixBase<Derived>
#else
EIGEN_STATIC_ASSERT_SIZE_1x1(Derived)
eigen_assert(this->rows() == 1 && this->cols() == 1);
return derived().coeff(row,col);
Matrix<Scalar,1,1> result = *this;
return result.coeff(row,col);
#endif
}
@ -162,7 +163,8 @@ class ProductBase : public MatrixBase<Derived>
{
EIGEN_STATIC_ASSERT_SIZE_1x1(Derived)
eigen_assert(this->rows() == 1 && this->cols() == 1);
return derived().coeff(i);
Matrix<Scalar,1,1> result = *this;
return result.coeff(i);
}
const Scalar& coeffRef(Index row, Index col) const

20
test/product_small.cpp
View File

@ -25,6 +25,25 @@
#define EIGEN_NO_STATIC_ASSERT
#include "product.h"
// regression test for bug 447
void product1x1()
{
Matrix<float,1,3> matAstatic;
Matrix<float,3,1> matBstatic;
matAstatic.setRandom();
matBstatic.setRandom();
VERIFY_IS_APPROX( (matAstatic * matBstatic).coeff(0,0),
matAstatic.cwiseProduct(matBstatic.transpose()).sum() );
MatrixXf matAdynamic(1,3);
MatrixXf matBdynamic(3,1);
matAdynamic.setRandom();
matBdynamic.setRandom();
VERIFY_IS_APPROX( (matAdynamic * matBdynamic).coeff(0,0),
matAdynamic.cwiseProduct(matBdynamic.transpose()).sum() );
}
void test_product_small()
{
for(int i = 0; i < g_repeat; i++) {
@ -33,6 +52,7 @@ void test_product_small()
CALL_SUBTEST_3( product(Matrix3d()) );
CALL_SUBTEST_4( product(Matrix4d()) );
CALL_SUBTEST_5( product(Matrix4f()) );
CALL_SUBTEST_6( product1x1() );
}
#ifdef EIGEN_TEST_PART_6