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method passed as parameter in function [message #57587]

Sun, 03 October 2021 15:04

BetoValle
Messages: 204
Registered: September 2020
Location: Brasil Valinhos SP

Experienced Member

Hi,

These methods below within the class do not allow it to be
compiled this way! is it possible something analogous
so that the fx_ method inside the class
compile on u++? If positive how would it be?

Thanks!


class ab {
public:
	String fx1( Value v1){
		
	 return "fx1";	
	}
	String fx2( Value v2){
		
	 return "fx2";	
	}
	String fx3( Value v3){
		
	 return "fx3";	
	}	
        String fx_( Value v , String (ab::*func)(Value) ){

          return func(v);          
  
        }

};

CONSOLE_APP_MAIN
{
   
   Value v=1;
   ab f
   String x= f.fx_( v, ab::&fx1);
   Cout() << x << EOL;
}

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Re: method passed as parameter in function [message #57590 is a reply to message #57587]

Mon, 04 October 2021 13:15

pvictor
Messages: 75
Registered: December 2015

Member

BetoValle wrote on Sun, 03 October 2021 18:04

Hi,

These methods below within the class do not allow it to be
compiled this way! is it possible something analogous
so that the fx_ method inside the class
compile on u++? If positive how would it be?

Thanks!
class ab {
public:
	String fx1( Value v1){
		
	 return "fx1";	
	}
	String fx2( Value v2){
		
	 return "fx2";	
	}
	String fx3( Value v3){
		
	 return "fx3";	
	}	
        String fx_( Value v , String (ab::*func)(Value) ){

          return func(v);          
  
        }

};

CONSOLE_APP_MAIN
{
   
   Value v=1;
   ab f
   String x= f.fx_( v, ab::&fx1);
   Cout() << x << EOL;
}

Try this:

#include <Core/Core.h>
using namespace Upp;

class ab {
public:
	String fx1( Value v1){
		return "fx1";
	}
	String fx2( Value v2){
		return "fx2";
	}
	String fx3( Value v3){
		return "fx3";
	}
	String fx_( Value v , String (ab::*func)(Value) ){
		return (this->*func)(v);
	}
};

CONSOLE_APP_MAIN
{
   Value v=1;
   ab f;
   String x= f.fx_( v, &ab::fx1);
   Cout() << x << EOL;
}

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Re: method passed as parameter in function [message #57593 is a reply to message #57590]

Mon, 04 October 2021 13:46

BetoValle
Messages: 204
Registered: September 2020
Location: Brasil Valinhos SP

Experienced Member

now this work fine! Thanks!

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