UnusedDeclaration Warning

Example

module ShortFailingExample ( exportedThing ) where

-- This declaration is exported, so used
exportedThing = 42 :: Int

-- This declaration is neither used in the module, nor exported
problem = "problem" :: String

Cause

This warning identifies a declaration that is not exported, and is not used in the containing module. Such a declaration is "dead code" and can safely be removed.

Fix

• Remove the declaration if it is unused
• Use it within the module
• Export the declaration if required

Notes