JSON Decode Exploration

I should really write some elevator-pitch style examples to include here. Oh well.

Made with ❤️ and released under BSD3.

Changelog

4.2.1

Changed

• Json.Decode.Exploration.Pipeline.optional and optionalAt now error when used on something that is not an object. The clue is that each field in the path is optional in the existential sense - if it simply does not exist, we dutifully use the provided fallback. However, if a field exists but does not point to an object, we now error out instead.
• as a side effect, both of the above now correctly mark empty objects as having been used, rather than giving a warning when using optional on an empty object.

Thanks to @michaeljones for surfacing this in #3.

4.2.0

Added

• Json.Decode.Exploration.check: verify the value of a field while decoding
• Json.Decode.Exploration.Pipeline:
  • checked and checkedAt: verify values during decoding
  • ignored and ignoredAt: completely ignore values during decoding

Thanks to @michaeljones for the proposal.

Changed

Increased test coverage of Json.Decode.Exploration.Pipeline.

4.1.2

Fixed

BadField errors weren't properly traced through the stack.

Changed

Increase test coverage of Json.Decode.Exploration.