explicit copy and assignment for shared_vector

Add explicit copy constructor and
assignment operator for shared_vector.

pvDataApp/misc/sharedVector.h

@@ -113,6 +113,11 @@ namespace detail {
             :m_data(d,b), m_offset(o), m_count(c), m_total(c)
         {_null_input();}
 
+        shared_vector_base(const shared_vector_base& O)
+            :m_data(O.m_data), m_offset(O.m_offset)
+            ,m_count(O.m_count), m_total(O.m_total)
+        {}
+
         template<typename E1>
         shared_vector_base(const shared_vector_base<E1>& o)
             : m_data(vector_implicit_cast<E1,E>::cast(o.m_data))
@@ -131,6 +136,19 @@ namespace detail {
             return *this;
         }
 
+        //! @brief Copy an existing vector of a related type
+        template<typename E1>
+        shared_vector_base& operator=(const shared_vector_base<E1>& o)
+        {
+            if(&o!=this) {
+                m_data=vector_implicit_cast<E1,E>::cast(o.m_data);
+                m_offset=o.m_offset;
+                m_count=o.m_count;
+                m_total=o.m_total;
+            }
+            return *this;
+        }
+
         //! @brief Swap the contents of this vector with another
         void swap(shared_vector_base& o) {
             if(&o!=this) {
@@ -284,7 +302,10 @@ public:
     shared_vector(A d, B b, size_t o, size_t c)
         :base_t(d,b,o,c) {}
 
-    //! @brief Copy an existing vector of same or related type
+    //! @brief Copy an existing vector of same type
+    shared_vector(const shared_vector& o) :base_t(o) {}
+
+    //! @brief Copy an existing vector of a related type
     template<typename E1>
     shared_vector(const shared_vector<E1>& o) :base_t(o) {}
 

testApp/misc/testSharedVector.cpp

@@ -212,6 +212,9 @@ static void testConst()
 
     testOk1(wcr==rocr);
 
+    rodata = writable;
+    testOk1(rodata.data()==writable.data());
+
     // Data is R/W, but container can't be re-targeted
     const epics::pvData::shared_vector<int> roref(writable);
 
@@ -381,7 +384,7 @@ static void testNonPOD()
 
 MAIN(testSharedVector)
 {
-    testPlan(115);
+    testPlan(116);
     testDiag("Tests for shared_vector");
 
     testDiag("sizeof(shared_vector<int>)=%lu",