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

Conflicts

None