From 11d6465326a047663fa5961a865fbd15df6e29e4 Mon Sep 17 00:00:00 2001
From: Janek Kozicki <jkozicki-yade@pg.edu.pl>
Date: Thu, 5 Dec 2019 17:18:05 +0100
Subject: [PATCH] fix AlignedVector3 inconsisent interface with other Vector
 classes, default constructor and operator- were missing.

---
 unsupported/Eigen/AlignedVector3    | 6 ++++++
 unsupported/test/alignedvector3.cpp | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/unsupported/Eigen/AlignedVector3 b/unsupported/Eigen/AlignedVector3
index a67ee6e42..4fa1842ac 100644
--- a/unsupported/Eigen/AlignedVector3
+++ b/unsupported/Eigen/AlignedVector3
@@ -78,6 +78,9 @@ template<typename _Scalar> class AlignedVector3
     { return m_coeffs.coeffRef(index);}
 
 
+    inline AlignedVector3()
+    {}
+
     inline AlignedVector3(const Scalar& x, const Scalar& y, const Scalar& z)
       : m_coeffs(x, y, z, Scalar(0))
     {}
@@ -131,6 +134,9 @@ template<typename _Scalar> class AlignedVector3
     inline AlignedVector3 operator-(const AlignedVector3& other) const
     { return AlignedVector3(m_coeffs - other.m_coeffs); }
 
+    inline AlignedVector3 operator-() const
+    { return AlignedVector3(-m_coeffs); }
+
     inline AlignedVector3 operator-=(const AlignedVector3& other)
     { m_coeffs -= other.m_coeffs; return *this; }
 
diff --git a/unsupported/test/alignedvector3.cpp b/unsupported/test/alignedvector3.cpp
index fcc89daab..f442e416a 100644
--- a/unsupported/test/alignedvector3.cpp
+++ b/unsupported/test/alignedvector3.cpp
@@ -70,6 +70,9 @@ void alignedvector3()
     VERIFY_IS_APPROX(f6,r1-r4);
   }
   
+  FastType f8, f9(0,0,0);
+  VERIFY_IS_APPROX(f9-f1,-f1);
+
   std::stringstream ss1, ss2;
   ss1 << f1;
   ss2 << r1;