hjsonpointer: JSON Pointer library

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Versions [RSS] [faq],,,,,,,,,,,,,,,, 1.1.1, 1.2.0, 1.3.0, 1.4.0, 1.5.0
Change log changelog.md
Dependencies aeson (>=0.7 && <1.4), base (>=4.9 && <5), hashable (==1.2.*), text (==1.2.*), unordered-containers (==0.2.*), vector (>=0.10 && <0.13) [details]
License MIT
Author Ian Grant Jeffries
Maintainer ian@housejeffries.com
Revised Revision 3 made by seagreen at 2019-09-03T02:13:26Z
Category Data
Home page https://github.com/seagreen/hjsonpointer
Uploaded by seagreen at 2018-09-30T18:32:26Z
Distributions Arch:1.5.0, NixOS:1.5.0, Stackage:1.5.0
Downloads 14558 total (134 in the last 30 days)
Rating 1.75 (votes: 1) [estimated by Bayesian average]
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2018-09-30 [all 1 reports]


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Readme for hjsonpointer-1.5.0

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JSON Pointer library for Haskell.

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module Example where

import           Control.Monad (unless)
import           Data.Aeson
import qualified JSONPointer   as JP

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

    -- We can also write JSON Pointers in Haskell.
    let pntr2 = JP.Pointer [JP.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 (JP.unescape "/~1" == Right pntr2) (error "ohno!")

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

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


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