JSON codec for Red

This code defines load-json and to-json, as well as codecs for load and save.

Note: Red's integers are only 32bits while JSON data may contain 64bit integers (eg. see tests/data/twitter.json). This could be a source of silent bugs. Please beware.

Also, please be aware that keys in JSON data are case sensitive. Use select/case and put/case on the resulting Red maps if needed.

Branches

• master - default branch, for use with the interpreter

• compiler - includes modifications for use with compiled programs

• non-recursive - if you are getting stack overflows with to-json, you can either try a more recent version of Red, or use the version of to-json in this branch.

Testing

• %tests.red Runs all the tests
• %tools/json-console.red Interactive testing for small JSON strings
• %tools/parse-test-file.red Select one JSON file to test

Other versions

• https://github.com/red/wallet/blob/master/libs/JSON.red

• %references/json.r Official R2 JSON library

• %references/chris-rg-json.r3 Chris Ross-Gill's R3 version

• %references/kaj-json.red Kaj de Vos

• %references/wise-genius-json.red WiseGenius's Red version

• https://github.com/rgchris/Scripts/blob/master/red/altjson.red

Old text

Old things are included here for reference. The wallet code has a minimal JSON parser, which is the most modern version. The most value here may come from the test files.

Red should get a basic GC before too long, so I don't think it's worth the effort to avoid allocations on those grounds.

Once the core works, the big difference from Rebol is that we have load/as and save/as that work with system/codecs (see %red/environment/codecs/) rather than just creating to-json/load-json global funcs.