alias uint8  = ubyte;
alias uint64 = ulong;


import std.stdio;

import core.thread : Fiber;


uint64 fact(uint64 n){
  return fact(n, 1);
}

uint64 fact(uint64 n, uint64 a){
  if(n == 0){
    return a;
  }else{
    return fact(n - 1, n * a);
  }
}


void test7_spawner(){
  uint64[] inputs = [5, 7, 10, 3, 8];
  uint64[] results = new uint64[inputs.length];
  
  Fiber[] fibers;
  fibers.length = inputs.length;
  
  for(int i = 0; i < inputs.length; i++){
    int index = i;
    
    fibers[i] = new Fiber({
      results[index] = fact(inputs[index]);
    });
    
    fibers[i].call();
    writefln("fact(%s) = %s", inputs[i], results[i]);
  }
}

/*

./vtest2
hello here!
fact(5) = 120
fact(7) = 5040
fact(10) = 3628800
fact(3) = 6
fact(8) = 40320

*/