title: What is the purpose of double colons in Lua?
body: <p>I have been aware that version 5.3 for Lua had come out not too long ago but hadn't had a reason to visit the documentation online until now.  I may be wrong, but I do not believe to remember the usage of the double-colons <code>::</code> like it is used so abundantly there.</p>
  
  <p>I see that it is considered a "special token" like others are (greater than, less than, asterisks, etc) but I know what those are for.  </p>
  
  <p>What is the purpose of using them in Lua?</p>