package yojson

  1. Overview
  2. Docs
Yojson is an optimized parsing and printing library for the JSON format

Install

Dune Dependency

github.com Readme Changelog BSD-3-Clause License Edit opam file Versions (22)

Authors

  1. M
    Martin Jambon

Maintainers

  1. P
    paul-elliot@tarides.com
  2. N
    nathan@tarides.com
  3. M
    marek@tarides.com

Sources

yojson-2.1.2.tbz
sha256=59f2f1abbfc8a7ccbdbf608894e5c75e8a76006e34899254446f83e200dfb4f9
sha512=309cba7568dec51de20c7ab8df033258c275b8d58b0a36a66b26e673a3bc050cbd7e39ff8fe4796e89263e125bcc21e04dc36a394f3cc201956887eee1fb281a

Description

Yojson is an optimized parsing and printing library for the JSON format.

ydump is a pretty-printing command-line program provided with the yojson package.

Published: 27 Nov 2023

README

Yojson: JSON library for OCaml

This library parses JSON data into a nested OCaml tree data structure.

Library documentation

Currently at https://ocaml-community.github.io/yojson/

Examples

A simple example on how to parse JSON from a string literal.

let json_string = {|
  {"number" : 42,
   "string" : "yes",
   "list": ["for", "sure", 42]}|}
(* val json_string : string *)

let json = Yojson.Safe.from_string json_string
(* val json : Yojson.Safe.t *)

let () = Format.printf "Parsed to %a" Yojson.Safe.pp json

Related tooling

Yojson is a pretty common choice for parsing JSON in OCaml, as such it is the base for a number of tools and libraries that are built on top of it.

  • ppx_deriving_yojson to automatically generate code that converts between Yojson.Safe.t and custom OCaml types

  • ppx_yojson_conv, an alternative to ppx_deriving_yojson from Jane Street with different design decisions

  • atd, generates mapping code from .atd specification files and can be used in multiple languages

  • jsonm is an alternate JSON parser that parses JSON into a stream of items, so the complete data structure does not have to be in memory.

Help wanted

Yojson is developed and maintained by volunteers — users like you. Various issues are in need of attention. If you'd like to contribute, please leave a comment on the issue you're interested in, or create a new issue. Experienced contributors will guide you as needed.

There are many simple ways of making a positive impact. For example, you can...

  • Use the software in your project.

  • Give a demo to your colleagues.

  • Share the passion on your blog.

  • Tweet about what you're doing with Yojson.

  • Report difficulties by creating new issues. We'll triage them.

  • Ask questions on StackOverflow.

  • Answer questions on StackOverflow.

  • Discuss usage on the OCaml forums.

  • Pick a task that's easy for you.

Check out in particular good first time issues and other issues with which we could use some help.

License

Yojson is licensed under the 3-clause BSD license, see LICENSE.md for details.

Dependencies (4)

  1. seq >= "0.2.2"
  2. cppo build
  3. ocaml >= "4.02.3"
  4. dune >= "2.7"

Dev Dependencies (2)

  1. odoc with-doc
  2. alcotest with-test & >= "0.8.5"

  1. 0install >= "2.18"
  2. abella >= "2.0.8"
  3. acgtk >= "1.3.2"
  4. archetype
  5. atd >= "2.6.0"
  6. atdgen < "1.9.0" | >= "1.13.0" & < "2.8.0" | >= "2.10.0"
  7. atdgen-runtime >= "2.10.0"
  8. avro-compiler
  9. aws < "1.0.0"
  10. aws-config
  11. aws-s3 >= "1.1.0" & < "4.5.1" | >= "4.8.0"
  12. awsm-codegen
  13. bap-radare2
  14. beluga >= "1.1"
  15. bitcoin >= "3.0"
  16. boulangerie
  17. caisar
  18. calculon != "0.5"
  19. calculon-redis-lib
  20. camelot >= "1.3.0"
  21. camels
  22. canary
  23. catala >= "0.9.0"
  24. cb-check
  25. cbor != "0.2"
  26. cconv-ppx
  27. colibrics
  28. comby-semantic
  29. commons
  30. containers >= "3.9"
  31. coq-lsp
  32. coq-of-ocaml
  33. coq-serapi >= "8.10.0+0.7.0"
  34. current_docker
  35. current_examples >= "0.4"
  36. current_git
  37. current_github
  38. current_gitlab
  39. current_slack
  40. current_ssh
  41. current_web >= "0.4"
  42. cwe_checker
  43. dap
  44. datakit-ci >= "0.12.3"
  45. daypack-lib
  46. decoders-yojson >= "0.7.0"
  47. deriving-yojson
  48. devkit >= "0.4"
  49. docfd >= "2.1.0"
  50. docker-api >= "0.2.2"
  51. docker_hub
  52. dot-merlin-reader != "4.4~5.0.preview" & < "4.6"
  53. dream
  54. dune-release >= "1.4.0"
  55. earlybird < "1.0.0"
  56. eio_main >= "0.10"
  57. facebook-sdk < "0.3.1"
  58. fiat-p256
  59. fit >= "1.2.0"
  60. forester >= "3.1.0"
  61. frama-c >= "19.0" & < "23.0" | >= "27.0~beta"
  62. fred
  63. frenetic >= "3.2.0"
  64. fstar >= "0.9.3.0-beta1"
  65. gapi-ocaml < "0.3.5" | >= "0.4.3"
  66. gdbprofiler >= "0.2"
  67. gemini
  68. gen-bs >= "0.1.0"
  69. github != "4.0.0"
  70. github-data
  71. gitlab
  72. goblint >= "2.0.0"
  73. goblint-cil >= "1.8.0"
  74. gopcaml-mode-merlin < "0.0.6"
  75. gradescope_submit
  76. graphql < "0.9.0" | >= "0.14.0"
  77. graphql-async >= "0.14.0"
  78. graphql-cohttp >= "0.13.0"
  79. graphql-lwt >= "0.14.0"
  80. graphql_ppx
  81. gremlin
  82. guardian
  83. h2
  84. hacl_x25519
  85. hilite < "0.3.0"
  86. hl_yaml
  87. hockmd
  88. horned_worm
  89. hpack
  90. hsluv
  91. httph
  92. index-bench
  93. iocaml
  94. iocaml-kernel
  95. ip2location
  96. ip2locationio
  97. irmin-bench < "3.0.0"
  98. irmin-graphql >= "2.2.0"
  99. irmin-tezos
  100. jasmin
  101. jhupllib
  102. jose
  103. js_of_ocaml-compiler
  104. json-pointer
  105. json-predicate
  106. jsonrpc < "1.6.0"
  107. jsonschema2atd
  108. jupyter
  109. jupyter-kernel
  110. jwto
  111. kappa-library
  112. karamel
  113. ketrew
  114. kind2
  115. kremlin < "transition"
  116. kubecaml
  117. lablgtk3-extras >= "3.0.1"
  118. lablqt
  119. lambdapi >= "2.0.0"
  120. learn-ocaml
  121. letsencrypt
  122. letters
  123. libsail
  124. linol >= "0.2"
  125. linol-lwt
  126. lockfree >= "0.3.0"
  127. logs-async-reporter >= "1.3"
  128. lsp
  129. merlin = "3.0.3" | = "3.8.0" | >= "4.6-412"
  130. merlin-acme
  131. metadb
  132. mezzo
  133. minimal >= "1.1.0"
  134. mirage-crypto-ec
  135. mjson
  136. monorobot
  137. morbig >= "0.11.0"
  138. multicore-bench
  139. netml
  140. nloge
  141. nsq >= "0.2.4"
  142. obuilder
  143. ocaml-gist
  144. ocaml-lsp-server
  145. ocaml-protoc-plugin >= "6.1.0"
  146. ocaml-webworker
  147. ocaml_db_model
  148. ocaml_pgsql_model
  149. ocamleditor >= "1.15.2-ocaml414"
  150. ocf
  151. oclaunch < "0.2.1"
  152. ocsigen-start
  153. odoc >= "2.0.0" & < "2.1.1" | >= "2.3.0"
  154. oframl
  155. ogen = "0.1.2"
  156. oidc
  157. ojs-base != "0.2.0"
  158. ojs_base
  159. ometrics < "0.2.0"
  160. opam2web >= "2.0"
  161. openai-gym
  162. openapi
  163. openapi_router
  164. openstellina
  165. opium >= "0.19.0"
  166. oraft
  167. orun
  168. osh
  169. ozulip
  170. pa_ppx
  171. pandoc
  172. pbrt_yojson
  173. pds-reachability >= "0.2.3"
  174. petr4
  175. phylogenetics >= "0.2.0"
  176. piece_rope
  177. pkcs11-driver >= "1.0.0"
  178. plist >= "1.0.0"
  179. podge >= "0.4"
  180. ppx_deriving_protocol < "0.8.1"
  181. ppx_deriving_yojson >= "3.4"
  182. ppx_graphql
  183. ppx_json_types
  184. ppx_protocol_conv = "2.0.0"
  185. ppx_protocol_conv_json = "3.1.3" | >= "5.2.1"
  186. ppx_yojson
  187. ppx_yojson_conv < "v0.13.0"
  188. ppx_yojson_conv_lib
  189. prof_spacetime
  190. qmp >= "0.19.0"
  191. quests
  192. r2pipe
  193. radare2
  194. rdf >= "0.9.0"
  195. records = "0.6.0" | >= "1.0.0"
  196. repr-bench
  197. rpc = "2.2.0"
  198. rpclib >= "6.0.0"
  199. rubytt
  200. rungen
  201. SZXX
  202. safemoney
  203. sail < "0.15"
  204. saturn
  205. saturn_lockfree
  206. satyrographos != "0.0.2.7"
  207. semver2
  208. serde_json
  209. sihl < "0.2.0" | >= "0.3.0~rc2"
  210. sihl-core
  211. slack
  212. slacko < "0.14.1"
  213. slug
  214. sparrow
  215. sphinxcontrib-ocaml
  216. spotify-web-api
  217. starred_ml
  218. swagger
  219. tdigest < "2.1.0"
  220. telegraml < "2.2.0"
  221. testrunner
  222. textmate-language >= "0.3.4"
  223. textrazor >= "0.1.1"
  224. tezos-context-hash-irmin
  225. themoviedb
  226. tidy_email_sendgrid
  227. timedesc < "0.8.0"
  228. timedesc-json
  229. timere < "0.4.0"
  230. transmission-rpc
  231. u2f
  232. usbmux
  233. user-agent-parser
  234. vecosek
  235. vercel
  236. vscoq-language-server
  237. webauthn
  238. xapi-rrd >= "1.9.0"
  239. zanuda

Conflicts

None