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POUnable to access non-const member functions of objects in C++ std::set
 

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  1. POUnable to access non-const member functions of objects in C++ std::set
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    <p>Message is a class I made. I have a set of them in the main function that I pass to messageTimeOut (and some other functions). In messageTimeOut using an itorator I am looping through them and accessing different member functions. However, I can only access const member functions of the Message pointed to by the iterator. If I try to access non const member functions I get the error:</p> <blockquote> <p>“In function 'void messageTimeOut(threadParameters*)': main.cpp:74:33: error: passing 'const Message' as 'this' argument of 'void Message::setTimedOut(bool)' discards qualifiers [-fpermissive].”</p> </blockquote> <p>It makes sense that I cannot access a non-const member function of a const Message object, but how do I go about making this a non const Message object so I can access non const member functions and change the Message? Thanks</p> <p>Part of my code:</p> <pre><code> [ . . . ] void messageTimeOut( threadParameters* params ) { set&lt;Message&gt;::iterator it = params-&gt;messages-&gt;begin(); [ . . . ] for ( ; it != params-&gt;messages-&gt;end(); ++it ) { if ( (it-&gt;createdTime() + RESPONSE_WAIT) &lt; GetTickCount() ) { it-&gt;setTimedOut(true); // error } } ReleaseMutex(sentQueueMutex); } [ . . . ] int main() { threadParameters rmparameters; set&lt;Message&gt; sentMessages; [ . . . ] rmparameters.logFile = &amp;logFile; rmparameters.socket = socketDesciptor; rmparameters.messages = &amp;sentMessages; [ . . . ] messageTimeOut( rmparameters ); [ . . . ] return 0; } </code></pre>
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