Add ParamSchema & Schema for Numeric.Natural

[gkleen]

Seems reasonable to have a Schema for Numeric.Natural; it's in base and has aeson-support.

[phadej]

you need to add

  if !impl(ghc >= 7.10)
    build-depends:
      nats               >=1.1.1    && <1.2

to make GHC-7.8.4 happy.

[gkleen]

Okay, I don't have a testing environment for anything but the current ghc version set up, so let's just see if travis is happy :-)

I also don't think we need to restrict the version of nats to anything other than < 2; all we really need is that a type called Natural exists

[fizruk]

@pngwjpgh thanks for your contributions!

@phadej feel free to merge this and #121 when you're happy with dependency constraints.
I can make a release shortly after.

[phadej]

FWIW, I'd really like to have both upper and lower bounds. It's unluckily nats will get major updated, but if it will, it most likely be broken in a bad way.

[gkleen]

Would you be okay with >=0.1 && <2 then?

Version 0.1 is the first one and introduces Numeric.Natural.Natural.
By semantic versioning dropping the name Numeric.Natural.Natural for the type would lead to a version 2.* being an incompatible api change.

Afaik @ekmett has always been good with adhering to semantic versioning.

[phadej]

I insist on >=1.1.1 && <1.2. There is no need to support older versions. If we haven't ever tested with 0.1, then we shouldn't claim we support it. Travis says on GHC-7.8.4 job

Loading package nats-1.1.1 ... linking ... done.

Hackage uses PVP where two first digits act as major, third as a minor and fourth as a patch. So in this case nats-1.2 might introduce breaking change (unluckily, but still).

[phadej]

also rebase needed now.

[gkleen]

Valid points. Thanks for linking me to PVP, I didn't know about that :-D

[ekmett]

Just for the record, I follow the PvP as closely as I can. In addition I reserve the first digit for major overhauls that break my own packages. (This can make my package bounds look a bit like sem-ver.) Restricting off the second digit as @phadej notes is the correct option per the PVP.