Popularity
6.4
Stable
Activity
0.0
Declining
6
3
6
Monthly Downloads: 11
Programming language: Haskell
License: MIT License
Tags:
Data
Latest version: v1.5.0
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README
Summary
JSON Pointer library for Haskell.
Example
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)
where
document :: Value
document = object [ "foo" .= [String "bar", String "baz"]
, "/" .= String "quux"
]
Output:
Right (String "bar")
Right (String "quux")