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POHow to pass a vector of a Child class in to a function expecting a vector of Parent class?
 

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  1. POHow to pass a vector of a Child class in to a function expecting a vector of Parent class?
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    <p>I can pass in a Child to a member function expecting a Parent, however when using vectors I get a compile error saying there's no matching declaration. See the CorrelationEngineManager.cpp call to getUniqueLabels() at the bottom</p> <p>ServerEvent.h</p> <pre><code>#ifndef SERVEREVENT_H #define SERVEREVENT_H #define SERVEREVENT_COLS 3 #include "Event.h" #include &lt;vector&gt; class ServerEvent: public Event { private: public: ServerEvent(std::vector&lt;std::string&gt; tokens); void print(); }; #endif </code></pre> <p>Event.h</p> <pre><code>#ifndef EVENT_H #define EVENT_H #include &lt;string&gt; #define EVENT_STOP 0 #define EVENT_START 1 class Event { private: protected: double time; std::string label; int type; // EVENT_START OR EVENT_STOP public: }; #endif </code></pre> <p>CorrelationEngineManager.h</p> <pre><code>class CorrelationEngineManager { private: std::vector&lt;ServerEvent&gt; s_events; std::vector&lt;UPSEvent&gt; u_events; std::vector&lt;TimeRecord&gt; s_timeRecords; std::vector&lt;TimeRecord&gt; u_timeRecords; // typeOfEvent gets type of event, 0 for error, look at #defines for codes int typeOfEvent(std::vector&lt;std::string&gt;); int createTimeRecords(); std::vector&lt;std::string&gt; getUniqueLabels(std::vector&lt;Event&gt; events); public: CorrelationEngineManager(); //~CorrelationEngineManager(); int addEvent(std::vector&lt;std::string&gt; tokens); //add event given tokens void print_events(); }; </code></pre> <p>CorrelationEngineManager.cpp</p> <pre><code>int CorrelationEngineManager::createTimeRecords() { std::vector&lt;std::string&gt; u_sLabels; // unique server labels std::vector&lt;std::string&gt; u_uLabels; // unique UPS labels u_sLabels = getUniqueLabels(s_events); // u_uLabels = getUniqueLabels(u_events); return 1; } // returns a vector of unique labels, input a vector of events std::vector&lt;std::string&gt; CorrelationEngineManager::getUniqueLabels(std::vector&lt;Event&gt; events) { std::vector&lt;std::string&gt; temp; return temp; } </code></pre> <p>compile error</p> <pre><code> CorrelationEngineManager.cpp: In member function ‘int CorrelationEngineManager::createTimeRecords()’: CorrelationEngineManager.cpp:60: error: no matching function for call to ‘CorrelationEngineManager::getUniqueLabels(std::vector&lt;ServerEvent, std::allocator&lt;ServerEvent&gt; &gt;&amp;)’ CorrelationEngineManager.h:23: note: candidates are: std::vector&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, std::allocator&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt; &gt; &gt; CorrelationEngineManager::getUniqueLabels(std::vector&lt;Event, std::allocator&lt;Event&gt; &gt;) make: *** [CorrelationEngineManager.o] Error 1 </code></pre>
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    1. COpossible duplicate of [C++: How do I pass a container of derived classes to a function expecting a container of their base classes?](http://stackoverflow.com/questions/2376334/c-how-do-i-pass-a-container-of-derived-classes-to-a-function-expecting-a-cont)
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