package yojson

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

Install 

dune-project
 Dependency

github.com Readme Changelog BSD-3-Clause License Edit opam file Versions (15)

Authors

  1. M
    Martin Jambon

Maintainers

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

Sources

yojson-2.1.0.tbz
sha256=9fcb1ff2db58ab259f9228796b0ada4794eae97177b1833371380c4e4f90b15d
sha512=31ab8580e0e4e8a05459fbec2fb9424a3df4cf5aef6df21fc577dbe3d32e81103a632c6a511c4dcf1f51819e88b38d2ce7d6888545bc3f359e69e070f8d2e69c

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: 02 May 2023

README

Yojson: JSON library for OCaml

Build Status

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

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. acgtk
  3. anthropic
  4. archetype
  5. atd >= "2.6.0"
  6. atdgen >= "1.13.0" & < "2.8.0" | >= "2.10.0"
  7. atdgen-runtime >= "2.10.0" & < "3.0.1"
  8. atdml
  9. avro-compiler
  10. avro-simple
  11. aws-config
  12. aws-s3 < "4.5.1" | >= "4.8.0"
  13. awskit-lwt-unix
  14. awskit-s3
  15. awsm-codegen
  16. awso
  17. awso-common
  18. bap-radare2
  19. beluga >= "1.1"
  20. bitcoin >= "3.0"
  21. bizowie-api
  22. boulangerie
  23. builder-web >= "0.2.0"
  24. cabal
  25. caisar
  26. calculon
  27. camelot >= "1.4.2"
  28. camels
  29. canary
  30. catala = "0.9.0" | >= "1.0.0~beta"
  31. cb-check
  32. cbor >= "0.3"
  33. chess_com_api
  34. colibrics
  35. comby-semantic
  36. commons
  37. containers >= "3.9"
  38. contract
  39. coq-lsp
  40. coq-of-ocaml
  41. coq-serapi < "8.20.0+0.20.0"
  42. current_docker
  43. current_examples
  44. current_git
  45. current_github
  46. current_gitlab
  47. current_slack
  48. current_ssh
  49. current_web
  50. dap
  51. daypack-lib
  52. dblp-api
  53. decoders-yojson >= "0.7.0"
  54. devkit
  55. dnsrobot
  56. docker-api >= "0.2.2"
  57. docker_hub
  58. dot-merlin-reader < "4.9"
  59. dream
  60. dream-inertia
  61. dune-release >= "1.4.0"
  62. dune_deps_extra
  63. ecma-regex
  64. eio_main >= "0.10"
  65. elasticsearch-cli = "0.5"
  66. elpi >= "3.3.1"
  67. fehu < "1.0.0~alpha3"
  68. fiat-p256
  69. fit >= "1.2.0"
  70. frama-c < "23.0" | >= "27.0~beta"
  71. fred
  72. frenetic
  73. fstar
  74. gapi-ocaml
  75. gdbprofiler
  76. gemini
  77. gendarme-json < "0.4.0"
  78. gendarme-yojson
  79. github != "4.0.0"
  80. github-data
  81. github-unix < "4.5.1"
  82. gitlab
  83. goblint >= "2.0.0"
  84. goblint-cil >= "1.8.0"
  85. gopcaml-mode-merlin < "0.0.6"
  86. gradescope_submit
  87. graphql < "0.9.0" | >= "0.14.0"
  88. graphql-async >= "0.14.0"
  89. graphql-cohttp >= "0.13.0"
  90. graphql-lwt >= "0.14.0"
  91. graphql_ppx
  92. gremlin
  93. guardian
  94. h2
  95. hacl_x25519
  96. handlebars-ml
  97. hegel
  98. hilite < "0.3.0"
  99. hl_yaml
  100. hockmd
  101. hpack
  102. hsluv
  103. httph
  104. huml
  105. huml-cli
  106. index-bench
  107. ip2location
  108. ip2locationio
  109. irmin-graphql
  110. irmin-tezos
  111. jasmin
  112. jhupllib
  113. jose
  114. js_of_ocaml-compiler
  115. jsonrpc < "1.6.0" | >= "1.23.1"
  116. jsonschema
  117. jsonschema-core
  118. jsonschema2atd
  119. jupyter
  120. jupyter-kernel
  121. jwto
  122. kappa-agents >= "4.1.3"
  123. kappa-binaries >= "4.1.3"
  124. kappa-library
  125. karamel
  126. kaun >= "1.0.0~alpha1" & < "1.0.0~alpha3"
  127. kind2
  128. kremlin < "transition"
  129. kubecaml
  130. lablgtk3-extras >= "3.0.1"
  131. lambdapi
  132. learn-ocaml
  133. letsencrypt < "2.0.0"
  134. letters
  135. libsail
  136. lichess_api
  137. linol >= "0.2"
  138. linol-eio
  139. linol-lwt
  140. lockfree >= "0.3.1"
  141. logs-async-reporter >= "1.3"
  142. lsp
  143. melange-json = "1.2.0"
  144. melange-json-native
  145. merlin != "4.5-411"
  146. metadb
  147. miaou-core
  148. miaou-driver-web
  149. mirage-crypto-ec
  150. mjson
  151. monorobot
  152. mopsa
  153. morbig >= "0.11.0"
  154. multicore-bench
  155. mutaml
  156. nats-client
  157. nats-client-async
  158. neo4j_bolt
  159. nloge
  160. nsq
  161. obuilder
  162. ocaml-lsp-server
  163. ocaml-protoc-plugin >= "6.1.0"
  164. ocaml_db_model
  165. ocaml_pgsql_model
  166. ocamleditor
  167. ocf
  168. ochre
  169. ocsigen-start
  170. odoc >= "3.0.0"
  171. odoc-driver
  172. oframl
  173. oidc
  174. ojs-base
  175. ojs_base
  176. ometrics < "0.2.0"
  177. opam-check-npm-deps >= "4.1.0"
  178. openai-gym
  179. openapi < "1.0.0"
  180. openapi_router
  181. opencage
  182. openstellina
  183. opium >= "0.19.0"
  184. oraft
  185. orun
  186. osh
  187. oui
  188. ozulip
  189. pa_ppx < "0.19"
  190. pandoc
  191. pbrt_yojson
  192. pds-reachability >= "0.2.3"
  193. pgn_parser
  194. phylogenetics >= "0.2.0"
  195. piece_rope
  196. pkcs11 >= "1.0.0"
  197. pkcs11-driver >= "1.0.0"
  198. playwright
  199. polymarket
  200. ppx_deriving_jsonschema
  201. ppx_deriving_yojson
  202. ppx_hegel_test
  203. ppx_protocol_conv_json >= "5.2.1"
  204. ppx_yojson
  205. ppx_yojson_conv_lib
  206. prof_spacetime
  207. pxshot
  208. qdrant
  209. qmp >= "0.19.0"
  210. quests
  211. r2pipe
  212. radare2
  213. rdf < "1.0.0"
  214. records >= "1.0.0"
  215. repr-bench
  216. rescriptdep
  217. rfsm >= "2.2"
  218. rocq-devtools
  219. rpclib
  220. rungen
  221. SZXX
  222. safemoney
  223. saga
  224. sail < "0.15"
  225. saturn
  226. saturn_lockfree
  227. satyrographos >= "0.0.2.8"
  228. savvy
  229. semver2
  230. serde_json
  231. shakuhachi
  232. sihl < "0.2.0" | >= "0.3.0~rc2"
  233. sihl-core
  234. simple_httpd
  235. slack
  236. slug
  237. smaws-lib
  238. smtml >= "0.7.0"
  239. snf_mcp
  240. soteria
  241. spectrum_palette_ppx
  242. spotify-web-api
  243. swagger
  244. talon < "1.0.0~alpha3"
  245. tdigest < "2.1.0"
  246. testcontainers
  247. textmate-language >= "0.3.4"
  248. textrazor >= "0.1.1"
  249. tidy_email_sendgrid
  250. timedesc < "0.8.0"
  251. timedesc-json
  252. timere < "0.4.0"
  253. transom
  254. user-agent-parser
  255. vecosek
  256. vercel
  257. vscoq-language-server < "2.3.3"
  258. vsrocq-language-server
  259. wasm_of_ocaml-compiler
  260. webauthn
  261. why3find
  262. xapi-rrd >= "1.9.0"
  263. yultracer
  264. zanuda
  265. zarr

Conflicts

None