pass block instruction as macro's argument in C

Question

I don\'t know if that is possible, I want to pass a block of instructions in macro like an argument.I will show you an example:

#define ADD_MACRO(size, BLOCK){ f         


        

Answer 1

You can do this by simply showing a block into the macro, or by using a variadic macro as suggested in another answer. However, I wouldn't recommend using macros for this purpose, as it tends to make the code less readable, more error-prone and harder to read/maintain.

Instead, for generic programming, consider using function pointers corresponding to the desired functionality.

Another option is to use the C11 _Generic macro to create type safe, generic code. Example:

#include 
#include 

void int_increase (int* item)
{
  (*item)++;
}

void char_increase (char* item)
{
  (*item)++;
}

void int_print (int* item)
{
  printf("%d ", *item);
}

void char_print (char* item)
{
  printf("%c", *item);
}

void int_clear (int* item)
{
  *item = 0;
}

void char_clear (char* item)
{
  *item = '\0';
}

void int_traverse (int* data, size_t size, void(*action)(int*))
{
  for(size_t i=0; i

Output:

2 3 4 5 6
0 0 0 0 0
BCDEF

Simply add more of the similar kind of functions if you need to use other types.