hjsonpointer: JSON Pointer library

[ data, library, mit ] [ Propose Tags ]

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Versions 0.1.0.0, 0.1.0.1, 0.2.0.0, 0.2.0.1, 0.2.0.2, 0.2.0.3, 0.2.0.4, 0.3.0.0, 0.3.0.1, 0.3.0.2, 1.0.0.0, 1.0.0.1, 1.0.0.2, 1.1.0.0, 1.1.0.1, 1.1.0.2, 1.1.1, 1.2.0, 1.3.0, 1.4.0, 1.5.0
Change log changelog.md
Dependencies aeson (>=0.7 && <0.12), base (>=4.6 && <4.10), QuickCheck (>=2.8 && <2.10), text (==1.2.*), unordered-containers (==0.2.*), vector (>=0.10 && <0.12) [details]
License MIT
Author Ian Grant Jeffries
Maintainer ian@housejeffries.com
Category Data
Home page https://github.com/seagreen/hjsonpointer
Source repo head: git clone git://github.com/seagreen/hjsonpointer.git
Uploaded by seagreen at Mon Jul 11 14:52:55 UTC 2016
Distributions Arch:1.4.0, NixOS:1.5.0
Downloads 5943 total (106 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2016-07-11 [all 1 reports]
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Readme for hjsonpointer-0.3.0.2

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Summary

JSON Pointer library for Haskell.

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Example

{-# LANGUAGE OverloadedStrings #-}

module Main where

import           Control.Monad      (unless)
import           Data.Aeson
import qualified Data.Aeson.Pointer as P

main :: IO ()
main = do
  -- JSON Pointers must either be empty or start with a /.
  pntr1 <- case P.unescape "/foo/0" of
             Left _     -> error "Failed to construct JSON Pointer."
             Right pntr -> pure pntr

  -- We can also write JSON Pointers in Haskell.
  let pntr2 = P.Pointer [P.Token "/"]
  -- When we do this we don't have to escape / or ~ characters
  -- (as ~1 and ~0 respectively) like we do in an escaped JSON
  -- Pointer string.
  unless (P.unescape "/~1" == Right pntr2) (error "ohno!")

  print (P.resolve pntr1 document)
  print (P.resolve pntr2 document)

  where
    document :: Value
    document = object [ "foo" .= [String "bar", String "baz"]
                      , "/"   .= String "quux"
                      ]

Output:

Right (String "bar")
Right (String "quux")