Added a copy constructor that increments the reference counter, thanks to a patch from Mark P.

src/SQLiteC++/Column.cpp

@@ -16,10 +16,22 @@ namespace SQLite
 
 // Encapsulation of a Column in a Row of the result.
 Column::Column(sqlite3* apSQLite, sqlite3_stmt* apStmt, unsigned int* apStmtRefCount, int aIndex) throw() : // nothrow
-    mpSQLite(apSQLite),
-    mpStmt(apStmt),
-    mpStmtRefCount(apStmtRefCount),
-    mIndex(aIndex)
+    mpSQLite        (apSQLite),
+    mpStmt          (apStmt),
+    mpStmtRefCount  (apStmtRefCount),
+    mIndex          (aIndex)
+{
+    // Increment the reference counter of the sqlite3_stmt,
+    // telling the Statement object not to finalize the sqlite3_stmt during the lifetime of this Column objet
+    (*mpStmtRefCount)++;
+}
+
+// Copy constructor
+Column::Column(const Column& copy) throw() : // nothrow
+    mpSQLite        (copy.mpSQLite),
+    mpStmt          (copy.mpStmt),
+    mpStmtRefCount  (copy.mpStmtRefCount),
+    mIndex          (copy.mIndex)
 {
     // Increment the reference counter of the sqlite3_stmt,
     // telling the Statement object not to finalize the sqlite3_stmt during the lifetime of this Column objet

src/SQLiteC++/Column.h

@@ -30,8 +30,11 @@ public:
      * @brief Compile and register the SQL query for the provided SQLite Database Connection
      */
     explicit Column(sqlite3* apSQLite, sqlite3_stmt* apStmt, unsigned int* apStmtRefCount, int aIndex) throw(); // nothrow
-    /// Basic destructor
-    virtual ~Column(void) throw(); // nothrow
+    /// Simple destructor
+    virtual ~Column(void)                   throw(); // nothrow
+
+    /// @brief copy constructor : only way to copy a valid instance
+             Column(const Column& aOther)   throw(); // nothrow
 
     /// Return the integer value of the column.
     int             getInt   (void) const throw();
@@ -78,9 +81,9 @@ public:
 #endif
 
 private:
-    // Column is copyable, but copy should not be used elsewhere than in return form getColumn
+    // Forbid default constructor and assignment operator (no implementation)
+    // so that there is no way of having a Column instance not initialized
     Column(void);
-    // TODO Column(const Column&);
     Column& operator=(const Column&);
 
 private: