Fix bug #314:

- remove most of the metaprogramming kung fu in MathFunctions.h (only keep functions that differs from the std)
- remove the overloads for array expression that were in the std namespace

1 files changed, 7 insertions, 4 deletions

diff --git a/Eigen/src/QR/ColPivHouseholderQR.h b/Eigen/src/QR/ColPivHouseholderQR.h
index 2daa23cc3..ea63e6f8e 100644
--- a/Eigen/src/QR/ColPivHouseholderQR.h
+++ b/Eigen/src/QR/ColPivHouseholderQR.h
@@ -181,11 +181,12 @@ template<typename _MatrixType> class ColPivHouseholderQR
       */
     inline Index rank() const
     {
+      using std::abs;
       eigen_assert(m_isInitialized && "ColPivHouseholderQR is not initialized.");
-      RealScalar premultiplied_threshold = internal::abs(m_maxpivot) * threshold();
+      RealScalar premultiplied_threshold = abs(m_maxpivot) * threshold();
       Index result = 0;
       for(Index i = 0; i < m_nonzero_pivots; ++i)
-        result += (internal::abs(m_qr.coeff(i,i)) > premultiplied_threshold);
+        result += (abs(m_qr.coeff(i,i)) > premultiplied_threshold);
       return result;
     }
 
@@ -342,9 +343,10 @@ template<typename _MatrixType> class ColPivHouseholderQR
 template<typename MatrixType>
 typename MatrixType::RealScalar ColPivHouseholderQR<MatrixType>::absDeterminant() const
 {
+  using std::abs;
   eigen_assert(m_isInitialized && "ColPivHouseholderQR is not initialized.");
   eigen_assert(m_qr.rows() == m_qr.cols() && "You can't take the determinant of a non-square matrix!");
-  return internal::abs(m_qr.diagonal().prod());
+  return abs(m_qr.diagonal().prod());
 }
 
 template<typename MatrixType>
@@ -358,6 +360,7 @@ typename MatrixType::RealScalar ColPivHouseholderQR<MatrixType>::logAbsDetermina
 template<typename MatrixType>
 ColPivHouseholderQR<MatrixType>& ColPivHouseholderQR<MatrixType>::compute(const MatrixType& matrix)
 {
+  using std::abs;
   Index rows = matrix.rows();
   Index cols = matrix.cols();
   Index size = matrix.diagonalSize();
@@ -426,7 +429,7 @@ ColPivHouseholderQR<MatrixType>& ColPivHouseholderQR<MatrixType>::compute(const
     m_qr.coeffRef(k,k) = beta;
 
     // remember the maximum absolute value of diagonal coefficients
-    if(internal::abs(beta) > m_maxpivot) m_maxpivot = internal::abs(beta);
+    if(abs(beta) > m_maxpivot) m_maxpivot = abs(beta);
 
     // apply the householder transformation
     m_qr.bottomRightCorner(rows-k, cols-k-1)