From e0dbc2913a4f176876ea56f247409ff340c5f1d3 Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Fri, 16 Aug 2013 16:43:02 +0200
Subject: [PATCH] Documentation of deprecated struct. Closing bug #426.

---
 Eigen/src/Core/Functors.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Eigen/src/Core/Functors.h b/Eigen/src/Core/Functors.h
index 080338617..69d95ea30 100644
--- a/Eigen/src/Core/Functors.h
+++ b/Eigen/src/Core/Functors.h
@@ -19,7 +19,7 @@ namespace internal {
 /** \internal
   * \brief Template functor to compute the sum of two scalars
   *
-  * \sa class CwiseBinaryOp, MatrixBase::operator+, class VectorwiseOp, MatrixBase::sum()
+  * \sa class CwiseBinaryOp, MatrixBase::operator+, class VectorwiseOp, DenseBase::sum()
   */
 template<typename Scalar> struct scalar_sum_op {
   EIGEN_EMPTY_STRUCT_CTOR(scalar_sum_op)
@@ -39,7 +39,11 @@ struct functor_traits<scalar_sum_op<Scalar> > {
   };
 };
 
-
+/** \internal
+  * \brief Template specialization to deprecate the summation of boolean expressions.
+  * This is required to solve Bug 426.
+  * \sa DenseBase::count(), DenseBase::any(), ArrayBase::cast(), MatrixBase::cast()
+  */
 template<> struct scalar_sum_op<bool> : scalar_sum_op<int> {
 	EIGEN_DEPRECATED
 	scalar_sum_op() {}