Not const method

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The message:


Not const method xxx called for const object XXX


appears, if the object XXX has been declared as const, but the method xxx of the object, would modify it.




In a function with the 


Parameter:  const mstrstr& xm


the cursor of xm shall be set to the next value:




But the cursor and its position "belong" to mstrstr. So the map would be modified by this action. The parameter has to be declared not const.


Parameter:  mstrstr& xm


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