The New C: X Macros (memo)

The code:

#include <stdio.h>

#define COLOR_TABLE \
X(red, "red")       \
X(green, "green")   \
X(blue, "blue")

#define X(a, b) a,
enum COLOR {
  COLOR_TABLE
};
#undef X

#define X(a, b) b,
char *color_name[] = {
  COLOR_TABLE
};
#undef X

int main() {
  enum COLOR c = red;
  printf("c=%s\n", color_name[c]);
  return 0;
}

 

Refer to http://www.drdobbs.com/cpp/184401387