libghc-cassava-megaparsec-dev binary package in Ubuntu Oracular amd64

 This package provides alternative parser for the Cassava package
 written with Megaparsec so you can get better error messages at
 expense of some speed.
 .
 The package works seamlessly with Cassava by replacing the following
 functions: decode, decodeWith, decodeByName, decodeByNameWith.
 .
 The functions work just the same as Cassava's equivalents, but also
 take name of file they parse (to include into error messages) and
 return typed high-quality error messages produced by Megaparsec.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.

Source package