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 != "0.5"
  21. calculon-redis-lib
  22. calculon-web = "0.6"
  23. camelot >= "1.3.0"
  24. camels
  25. canary
  26. catala = "0.9.0" | >= "1.0.0~beta"
  27. cb-check
  28. cbor >= "0.3"
  29. cconv-ppx
  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 >= "8.10.0+0.7.0" & < "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. eio_main >= "0.10"
  60. elasticsearch-cli = "0.5"
  61. elpi >= "3.3.1"
  62. fehu < "1.0.0~alpha3"
  63. fiat-p256
  64. fit >= "1.2.0"
  65. frama-c < "23.0" | >= "27.0~beta"
  66. fred
  67. frenetic
  68. fstar
  69. gapi-ocaml
  70. gdbprofiler
  71. gemini
  72. gendarme-json < "0.4.0"
  73. gendarme-yojson
  74. github != "4.0.0"
  75. github-data
  76. github-unix < "4.5.1"
  77. gitlab
  78. goblint >= "2.0.0"
  79. goblint-cil >= "1.8.0"
  80. gopcaml-mode-merlin < "0.0.6"
  81. gradescope_submit
  82. graphql < "0.9.0" | >= "0.14.0"
  83. graphql-async >= "0.14.0"
  84. graphql-cohttp >= "0.13.0"
  85. graphql-lwt >= "0.14.0"
  86. graphql_ppx
  87. gremlin
  88. guardian
  89. h2
  90. hacl_x25519
  91. handlebars-ml
  92. hilite < "0.3.0"
  93. hl_yaml
  94. hockmd
  95. horned_worm
  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. jsonschema2atd
  113. jupyter
  114. jupyter-kernel
  115. jwto
  116. kappa-agents >= "4.1.3"
  117. kappa-binaries >= "4.1.3"
  118. kappa-library
  119. karamel
  120. kaun >= "1.0.0~alpha1" & < "1.0.0~alpha3"
  121. kind2
  122. kremlin < "transition"
  123. kubecaml
  124. lablgtk3-extras >= "3.0.1"
  125. lambdapi
  126. learn-ocaml
  127. letsencrypt < "2.0.0"
  128. letters
  129. libsail
  130. lichess_api
  131. linol >= "0.2"
  132. linol-eio
  133. linol-lwt
  134. lockfree >= "0.3.1"
  135. logs-async-reporter >= "1.3"
  136. lsp
  137. melange-json = "1.2.0"
  138. melange-json-native
  139. merlin != "4.5-411"
  140. metadb
  141. mirage-crypto-ec
  142. mjson
  143. monorobot
  144. mopsa
  145. morbig >= "0.11.0"
  146. multicore-bench
  147. mutaml
  148. neo4j_bolt
  149. nloge
  150. nsq
  151. obuilder
  152. ocaml-lsp-server
  153. ocaml-protoc-plugin >= "6.1.0"
  154. ocaml_db_model
  155. ocaml_pgsql_model
  156. ocamleditor >= "1.15.2-ocaml414"
  157. ocf
  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. petr4
  183. pgn_parser
  184. phylogenetics >= "0.2.0"
  185. piece_rope
  186. pkcs11 >= "1.0.0"
  187. pkcs11-driver >= "1.0.0"
  188. polymarket
  189. ppx_deriving_jsonschema
  190. ppx_deriving_yojson
  191. ppx_protocol_conv_json < "5.0.0" | >= "5.2.1"
  192. ppx_yojson
  193. ppx_yojson_conv < "v0.13.0"
  194. ppx_yojson_conv_lib
  195. prof_spacetime
  196. pxshot
  197. qdrant
  198. qmp >= "0.19.0"
  199. quests
  200. r2pipe
  201. radare2
  202. rdf < "1.0.0"
  203. records = "0.6.0" | >= "1.0.0"
  204. repr-bench
  205. rfsm >= "2.2"
  206. rocq-devtools
  207. rpclib
  208. rungen
  209. SZXX
  210. safemoney
  211. saga
  212. sail < "0.15"
  213. saturn
  214. saturn_lockfree
  215. satyrographos != "0.0.2.7"
  216. savvy
  217. semver2
  218. serde_json
  219. shakuhachi
  220. sihl < "0.2.0" | >= "0.3.0~rc2"
  221. sihl-core
  222. simple_httpd
  223. slack
  224. slug
  225. smaws-lib
  226. smtml >= "0.7.0"
  227. snf_mcp
  228. spectrum_palette_ppx
  229. spotify-web-api
  230. swagger
  231. talon < "1.0.0~alpha3"
  232. tdigest < "2.1.0"
  233. testcontainers
  234. textmate-language >= "0.3.4"
  235. textrazor >= "0.1.1"
  236. tidy_email_sendgrid
  237. timedesc < "0.8.0"
  238. timedesc-json
  239. timere < "0.4.0"
  240. user-agent-parser
  241. vecosek
  242. vercel
  243. vscoq-language-server < "2.3.3"
  244. vsrocq-language-server
  245. wasm_of_ocaml-compiler
  246. webauthn
  247. why3find
  248. xapi-rrd >= "1.9.0"
  249. yultracer
  250. zanuda
  251. zarr

Conflicts

None