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

Conflicts

None