swiftのクロージャで多重ループを簡単に書いてみる

#include <stdio.h>
#include <stdlib.h>

#define N 10
#define START_LOOP for(int i=0; i < N; i++){\
                   for(int j=0; j < N; j++){\
                   for(int k=0; k < N; k++){
#define END_LOOP }}}

int main(){
    START_LOOP
        printf("%d %d %d\n",i,j,k);
    END_LOOP
}

let N = 10;

func nested_loop(closure:(Int,Int,Int)->()){
  for i in 0..<N {
    for j in 0..<N{
      for k in 0..<N{
        closure(i,j,k)
      }
    }
  }
}

nested_loop({(i,j,k) in
  print(i,j,k)
})

nested_loop({
  print($0,$1,$2)
})