Package

purescript-simple-json

Repository
justinwoo/purescript-simple-json
License
MIT
Uploaded by
justinwoo

Build Status

A simple Foreign/JSON library based on the Purescript's RowToList feature.

Requires compiler version 0.11.6 or greater.

Usage

See the API Docs or the tests for usage.

Usage Example

I use this in my simple-rpc-telegram-bot project to read configs quickly and easily:

newtype FilePath = FilePath String
derive instance ntFP :: Newtype FilePath _
derive newtype instance rfFP :: ReadForeign FilePath

newtype Token = Token String
derive instance ntT :: Newtype Token _
derive newtype instance rfT :: ReadForeign Token

newtype Id = Id Int
derive instance ntI :: Newtype Id _
derive newtype instance rfI :: ReadForeign Id

type Config =
  { token :: Token
  , torscraperPath :: FilePath
  , master :: Id
  }

getConfig :: IO (F Config)
getConfig = liftAff $ readJSON <$> readTextFile UTF8 "./config.json"

Warning: Maybe

This library will decode undefined and null as Nothing and write Nothing as null. Please use the NullOrUndefined type if you'd like to write undefined instead. Please take caution when using Maybe as this default may not be what you want.

See more here: https://github.com/justinwoo/purescript-simple-json/releases/tag/v0.10.0