optparse-generic

Auto-generate a command-line parser for your datatype

Version on this page:1.3.0
LTS Haskell 23.5:1.5.2@rev:1
Stackage Nightly 2025-01-21:1.5.2@rev:1
Latest on Hackage:1.5.2@rev:1

See all snapshots optparse-generic appears in

BSD-3-Clause licensed by Gabriel Gonzalez
Maintained by [email protected]
This version can be pinned in stack with:optparse-generic-1.3.0@sha256:48d62a9b51c27d95010dad1fa1209a8428b7b5509d9233deb9ec3ca6072f9468,1667

Module documentation for 1.3.0

Used by 5 packages in lts-11.22(full list with versions):
dhall, dhall-json, github-release, online, perf

This library auto-generates an optparse-applicative-compatible Parser from any data type that derives the Generic interface.

See the documentation in Options.Generic for an example of how to use this library

Changes

1.3.0

  • BREAKING CHANGE: New metavar method for ParseField class
    • This field simplifies customizing ParseField instances
      • Now you usually only need to override metavar now or possibly also readField, whereas the default behavior for parseField should work more often
    • This is only a breaking change for data types that use the default implementation of ParseField but do not derive Typeable
    • You can migrate existing code that doesn’t compile by just explicitly specifying what the metavar field should be