<div dir="ltr"><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">how to write a expand function that satisfies the following?</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
<br></div><span style="font-family:arial,sans-serif;font-size:12.727272033691406px">----</span><div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><div>void fun(ref int a,ref int b){</div><div>  a=1;</div>
<div>}</div></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px"><div>void main(){</div><div>  int[2]c;</div><div>  fun(c.expand);</div><div>  assert(c[0]==1);</div></div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">
}</div><div style="font-family:arial,sans-serif;font-size:12.727272033691406px">----</div></div>