Merge branch '398-compiler-error-with-quantityvector' into 'master'

Resolve "Compiler error with QuantityVector"

Closes #398

See merge request AirShowerPhysics/corsika!331

corsika/detail/framework/geometry/QuantityVector.inl

@@ -17,8 +17,8 @@
 namespace corsika {
 
   template <typename TDimension>
-  inline typename QuantityVector<TDimension>::quantity_type QuantityVector<TDimension>::
-  operator[](size_t const index) const {
+  inline typename QuantityVector<TDimension>::quantity_type
+  QuantityVector<TDimension>::operator[](size_t const index) const {
     return quantity_type(phys::units::detail::magnitude_tag, eigenVector_[index]);
   }
 
@@ -128,7 +128,7 @@ namespace corsika {
   }
 
   template <typename TDimension>
-  inline auto& QuantityVector<TDimension>::operator-() const {
+  inline auto QuantityVector<TDimension>::operator-() const {
     return QuantityVector<TDimension>(-eigenVector_);
   }
 

corsika/detail/framework/geometry/Vector.inl

@@ -194,7 +194,7 @@ namespace corsika {
   }
 
   template <typename TDimension>
-  inline auto& Vector<TDimension>::operator-() const {
+  inline auto Vector<TDimension>::operator-() const {
     return Vector<TDimension>(BaseVector<TDimension>::getCoordinateSystem(),
                               -BaseVector<TDimension>::getQuantityVector());
   }

corsika/framework/geometry/QuantityVector.hpp

@@ -89,7 +89,7 @@ namespace corsika {
 
     auto& operator-=(QuantityVector<TDimension> const& pQVec);
 
-    auto& operator-() const;
+    auto operator-() const;
 
     auto normalized() const;
 

corsika/framework/geometry/Vector.hpp

@@ -131,7 +131,7 @@ namespace corsika {
 
     auto& operator-=(Vector<TDimension> const& pVec);
 
-    auto& operator-() const;
+    auto operator-() const;
 
     auto normalized() const;