ErrorCall package:lens

This is thrown when the user calls error.

Retrieve the argument given to error. ErrorCall is isomorphic to a String.

>>> catching _ErrorCall (error "touch down!") return
"touch down!"

_ErrorCall :: Prism' ErrorCall     String
_ErrorCall :: Prism' SomeException String

__ErrorCall :: Prism' ErrorCall     ErrorCall
__ErrorCall :: Prism' SomeException ErrorCall