title: Not in scope: data constructor in Haskell
body: <p>Please tell me what is the problem? </p>
  
  <pre>
  data Stack' v = Stack' [v] Int deriving (Show)
  ...
  type StackInt = Stack' Int 
  
  main = print(StackInt [1,2,3] 4)
  </pre>
  
  <p>The error i am getting is </p>
  
  <pre>
  Not in scope: data constructor `Stackint'
  </pre>
  
  <p>What is wrong? </p>