avoid code duplication (move operations)

src/gsl_vector.cpp

@@ -21,6 +21,7 @@
 
 #include <cmath>
 #include <string>
+#include <utility>
 
 namespace flexiblesusy {
 
@@ -58,8 +59,7 @@ GSL_vector::GSL_vector(const GSL_vector& other)
 
 GSL_vector::GSL_vector(GSL_vector&& other) noexcept
 {
-   vec = other.vec;
-   other.vec = NULL;
+   move_assign(std::move(other));
 }
 
 GSL_vector::~GSL_vector()
@@ -99,10 +99,8 @@ const GSL_vector& GSL_vector::operator=(const GSL_vector& rhs)
 
 GSL_vector& GSL_vector::operator=(GSL_vector&& rhs)
 {
-   if (this != &rhs) {
-      vec = rhs.vec;
-      rhs.vec = NULL;
-   }
+   if (this != &rhs)
+      move_assign(std::move(rhs));
 
    return *this;
 }
@@ -153,6 +151,12 @@ std::ostream& operator<<(std::ostream& ostr, const GSL_vector& vec)
    std::cout << ")";
 }
 
+void GSL_vector::move_assign(GSL_vector&& other)
+{
+   vec = other.vec;
+   other.vec = NULL;
+}
+
 void GSL_vector::range_check(std::size_t n) const
 {
    if (!vec)

src/gsl_vector.hpp

@@ -47,6 +47,7 @@ class GSL_vector {
 private:
    gsl_vector* vec;                ///< raw gsl_vector
 
+   void move_assign(GSL_vector&&); ///< move assign
    void range_check(std::size_t) const;
 };