Is there a way to concatenate LINE and COUNTER macros in c++

Asked Apr 15 '16 at 20:19

Active Apr 15 '16 at 20:58

Viewed 150 times

i tried this but it is not working :

#include <iostream>
#define CAT(A,B) A##B
#define MY_MACRO CAT(__COUNTER__,__LINE__)
int main(){
    std::cout<<MY_MACRO<<std::endl;
    std::cin.get();
    return 0;
}

it generates this error In function int main() error COUNTER____LINE was not declared in this scope

this too not helping :

#include <iostream> 
#define F1(x,y) x##y 
#define F2(x,y) F1(x,y) 
#define MY_MACRO F2(COUNTER,LINE)
 int main()
{
 std::cout<<MY_MACRO<<std::endl;
 std::cin.get(); return 0;
 }

it does not concatenate it just returnes LINE macro value and if you replace it in the code with an integer it will return that integer only not concatenated with COUNTER , so this question is not rellay duplicated

edited Apr 15 '16 at 20:58

asked Apr 15 '16 at 20:19

Hassen Dhia

Format your code please – cleblanc Apr 15 '16 at 20:20
yes i did that now , it is halfly posted because connection is broken – Hassen Dhia Apr 15 '16 at 20:22
Duplicate: Not the exact duplicate, but the issue is explained in detail in the answer. – AnT stands with Russia Apr 15 '16 at 20:24
i tried that too '#include #define F1(x,y) x##y #define F2(x,y) F1(x,y) #define MY_MACRO F2(__COUNTER__,__LINE__) int main(){ std::cout< – Hassen Dhia Apr 15 '16 at 20:33
Well, what does "not working" mean? – GManNickG Apr 15 '16 at 20:41
it does not concatenate it just returnes __LINE__ macro value and if you replace it in the code with an integer it will return that integer only not concatenated with __COUNTER__ – Hassen Dhia Apr 15 '16 at 20:43

Is there a way to concatenate __LINE__ and __COUNTER__ macros in c++

0 Answers0

Is there a way to concatenate LINE and COUNTER macros in c++