fixed msvc9 build errors.

2 files changed, 7 insertions, 5 deletions

diff --git a/Eigen/src/Core/DenseBase.h b/Eigen/src/Core/DenseBase.h
index c5da1c6b0..b335754c0 100644
--- a/Eigen/src/Core/DenseBase.h
+++ b/Eigen/src/Core/DenseBase.h
@@ -290,14 +290,15 @@ template<typename Derived> class DenseBase
     template<int Size> struct FixedSegmentReturnType { typedef VectorBlock<Derived, Size> Type; };
     template<int Size> struct ConstFixedSegmentReturnType { typedef const VectorBlock<const Derived, Size> Type; };
     
+    // Note: The "DenseBase::" prefixes are added to help MSVC9 to match these declarations with the later implementations.
     SegmentReturnType segment(Index start, Index size);
-    ConstSegmentReturnType segment(Index start, Index size) const;
+    typename DenseBase::ConstSegmentReturnType segment(Index start, Index size) const;
 
     SegmentReturnType head(Index size);
-    ConstSegmentReturnType head(Index size) const;
+    typename DenseBase::ConstSegmentReturnType head(Index size) const;
 
     SegmentReturnType tail(Index size);
-    ConstSegmentReturnType tail(Index size) const;
+    typename DenseBase::ConstSegmentReturnType tail(Index size) const;
 
     template<int Size> typename FixedSegmentReturnType<Size>::Type head();
     template<int Size> typename ConstFixedSegmentReturnType<Size>::Type head() const;
diff --git a/Eigen/src/Core/MatrixBase.h b/Eigen/src/Core/MatrixBase.h
index 6fb10de9d..cf8e6841e 100644
--- a/Eigen/src/Core/MatrixBase.h
+++ b/Eigen/src/Core/MatrixBase.h
@@ -224,8 +224,9 @@ template<typename Derived> class MatrixBase
     template<int Index> typename DiagonalIndexReturnType<Index>::Type diagonal();
     template<int Index> typename ConstDiagonalIndexReturnType<Index>::Type diagonal() const;
 
-    typename DiagonalIndexReturnType<Dynamic>::Type diagonal(Index index);
-    typename ConstDiagonalIndexReturnType<Dynamic>::Type diagonal(Index index) const;
+    // Note: The "MatrixBase::" prefixes are added to help MSVC9 to match these declarations with the later implementations.
+    typename MatrixBase::template DiagonalIndexReturnType<Dynamic>::Type diagonal(Index index);
+    typename MatrixBase::template ConstDiagonalIndexReturnType<Dynamic>::Type diagonal(Index index) const;
 
     template<unsigned int Mode> TriangularView<Derived, Mode> part();
     template<unsigned int Mode> const TriangularView<Derived, Mode> part() const;