OrphanTypeDeclaration Error

Example

module ShortFailingExample where

addTwo :: Number -> Number -> Number
addToo a b = a + b
...

Cause

Purescript requires that the type declaration for a function or value (i.e. the line with the :: in it) be followed immediately by the definition of that function or value (i.e. the line with the = in it). The compiler has found a declaration for which a definition did not follow.

This is often caused by spelling mistakes. Check to see that the declaration and the definition are spelled the same. PureScript is a whitespace sensitive language and the presence of an extra space can make the definition look like a part of the declaration.

Fix

• Ensure that the next (non-comment) line is the definition for the listed declaration.
• Check that the spelling of the two matches.
• Check for extra spaces. Both declaration and definition should start with the same indentation.