//==== state.h
class State
{
protected:
void (*changeCallback)(State*);//owner's 'changestate' func
public:
State(void (*x)(State*)):changeCallback(x){};
virtual ~State(){};
virtual int Logic()=0;
virtual void Render()=0;
};
//==== State_GameMenu.h
#pragma once
#include "state.h"
#include "renderer.h"
class State_GameMenu : public State
{
public:
State_GameMenu(void (*)(State*));
~State_GameMenu(void);
virtual int Logic();
virtual void Render();
};
//==== State_GameMenu.cpp
#include "State_GameMenu.h"
State_GameMenu::State_GameMenu(void (*cb)(State*))
{
//error points here
}
State_GameMenu::~State_GameMenu(void)
{
}
//etc.
constructor problem
Author
I get the error " 'State' : no appropriate default constructor available "
I'm trying to pass a function pointer in the constructor, is my syntax wrong ?
You need to pass an argument to the State constructor. Ex:
State_GameMenu::State_GameMenu(void (*cb)(State*)) : State(cb) { }
Unless you specify otherwise, the constructor of a derived class will call the default constructor of the base class. Since you haven't defined one, you get an error. If you want it to call a parameterized constructor instead, do this:
Also if you're going to be using callbacks, I recommend considering boost::function.
State_GameMenu::State_GameMenu(void (*cb)(State*)) : State (cb)Also if you're going to be using callbacks, I recommend considering boost::function.
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