+Infinity, -Infinity, NaN are representable by Json

Question

+Infinity, -Infinity, NaN are representable by Json

Opened this issue 8 years ago · 3 comments

rightfold commented 8 years ago

The Json type includes these values, however they are not allowed in JSON.

Answer 1 · 2017-05-07T22:21:54.000Z

Some possible solutions, with their downsides:

Make fromNumber immediately return null on such inputs. This is breaking without a type change.
Make fromNumber return Maybe Json, and add fromNumber' which immediately returns null. This may confuse people.
Make stringify return Maybe String. This is annoying.

Answer 2 · 2017-05-07T22:33:52.000Z

As @garyb pointed out on Slack, not just fromNumber, but also jsonParser may return infinities; when a number is outside of the range of Number.

Answer 3 · 2020-09-03T00:22:20.000Z

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