Auto-generate a command-line parser for your datatype

LTS Haskell 11.13:1.3.0
Stackage Nightly 2018-06-17:1.3.0
Latest on Hackage:1.3.0

See all snapshots optparse-generic appears in

BSD3 licensed by Gabriel Gonzalez
Maintained by Gabriel439@gmail.com

Module documentation for 1.3.0

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



  • 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
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