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"
  8. avro-compiler
  9. aws-config
  10. aws-s3 < "4.5.1" | >= "4.8.0"
  11. awsm-codegen
  12. bap-radare2
  13. beluga >= "1.1"
  14. bitcoin >= "3.0"
  15. boulangerie
  16. builder-web >= "0.2.0"
  17. caisar
  18. calculon != "0.5"
  19. calculon-redis-lib
  20. calculon-web = "0.6"
  21. camelot >= "1.3.0"
  22. camels
  23. canary
  24. catala = "0.9.0" | >= "1.0.0~alpha"
  25. cb-check
  26. cbor >= "0.3"
  27. cconv-ppx
  28. chess_com_api
  29. colibrics
  30. comby-semantic
  31. commons
  32. containers >= "3.9"
  33. coq-lsp
  34. coq-of-ocaml
  35. coq-serapi >= "8.10.0+0.7.0" & < "8.20.0+0.20.0"
  36. current_docker
  37. current_examples
  38. current_git
  39. current_github
  40. current_gitlab
  41. current_slack
  42. current_ssh
  43. current_web
  44. dap
  45. daypack-lib
  46. dblp-api
  47. decoders-yojson >= "0.7.0"
  48. devkit
  49. docfd >= "2.1.0"
  50. docker-api >= "0.2.2"
  51. docker_hub
  52. dot-merlin-reader < "4.9"
  53. dream
  54. dream-inertia
  55. dune-release >= "1.4.0"
  56. dune_deps_extra
  57. eio_main >= "0.10"
  58. elasticsearch-cli = "0.5"
  59. elpi >= "3.3.1"
  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
  70. github != "4.0.0"
  71. github-data
  72. gitlab
  73. goblint >= "2.0.0"
  74. goblint-cil >= "1.8.0"
  75. gopcaml-mode-merlin < "0.0.6"
  76. gradescope_submit
  77. graphql < "0.9.0" | >= "0.14.0"
  78. graphql-async >= "0.14.0"
  79. graphql-cohttp >= "0.13.0"
  80. graphql-lwt >= "0.14.0"
  81. graphql_ppx
  82. gremlin
  83. guardian
  84. h2
  85. hacl_x25519
  86. hilite < "0.3.0"
  87. hl_yaml
  88. hockmd
  89. horned_worm
  90. hpack
  91. hsluv
  92. httph
  93. index-bench
  94. ip2location
  95. ip2locationio
  96. irmin-graphql
  97. irmin-tezos
  98. jasmin
  99. jhupllib
  100. jose
  101. js_of_ocaml-compiler
  102. jsonrpc < "1.6.0"
  103. jsonschema
  104. jsonschema2atd
  105. jupyter
  106. jupyter-kernel
  107. jwto
  108. kappa-agents >= "4.1.3"
  109. kappa-binaries >= "4.1.3"
  110. kappa-library
  111. karamel
  112. kind2
  113. kremlin < "transition"
  114. kubecaml
  115. lablgtk3-extras >= "3.0.1"
  116. lambdapi
  117. learn-ocaml
  118. letsencrypt
  119. letters
  120. libsail
  121. lichess_api
  122. linol >= "0.2"
  123. linol-eio
  124. linol-lwt
  125. lockfree >= "0.3.1"
  126. logs-async-reporter >= "1.3"
  127. lsp
  128. melange-json = "1.2.0"
  129. melange-json-native
  130. merlin != "4.5-411"
  131. metadb
  132. mirage-crypto-ec
  133. mjson
  134. monorobot
  135. mopsa
  136. morbig >= "0.11.0"
  137. multicore-bench
  138. mutaml
  139. nloge
  140. nsq
  141. obuilder
  142. ocaml-lsp-server
  143. ocaml-protoc-plugin >= "6.1.0"
  144. ocaml_db_model
  145. ocaml_pgsql_model
  146. ocamleditor >= "1.15.2-ocaml414"
  147. ocf
  148. ocsigen-start
  149. odoc >= "3.0.0"
  150. odoc-driver
  151. oframl
  152. oidc
  153. ojs-base
  154. ojs_base
  155. ometrics < "0.2.0"
  156. openai-gym
  157. openapi < "1.0.0"
  158. openapi_router
  159. opencage
  160. openstellina
  161. opium >= "0.19.0"
  162. oraft
  163. orun
  164. osh
  165. ozulip
  166. pa_ppx < "0.19"
  167. pandoc
  168. pbrt_yojson
  169. pds-reachability >= "0.2.3"
  170. petr4
  171. pgn_parser
  172. phylogenetics >= "0.2.0"
  173. piece_rope
  174. pkcs11 >= "1.0.0"
  175. pkcs11-driver >= "1.0.0"
  176. ppx_deriving_jsonschema
  177. ppx_deriving_yojson
  178. ppx_protocol_conv_json < "5.0.0" | >= "5.2.1"
  179. ppx_yojson
  180. ppx_yojson_conv < "v0.13.0"
  181. ppx_yojson_conv_lib
  182. prof_spacetime
  183. qmp >= "0.19.0"
  184. quests
  185. r2pipe
  186. radare2
  187. rdf < "1.0.0"
  188. records = "0.6.0" | >= "1.0.0"
  189. repr-bench
  190. rpclib
  191. rungen
  192. SZXX
  193. safemoney
  194. sail < "0.15"
  195. saturn
  196. saturn_lockfree
  197. satyrographos != "0.0.2.7"
  198. savvy
  199. semver2
  200. serde_json
  201. sihl < "0.2.0" | >= "0.3.0~rc2"
  202. sihl-core
  203. slack
  204. slug
  205. smaws-lib
  206. smtml >= "0.7.0"
  207. snf_mcp
  208. spotify-web-api
  209. swagger
  210. tdigest < "2.1.0"
  211. textmate-language >= "0.3.4"
  212. textrazor >= "0.1.1"
  213. tezos-context-hash-irmin
  214. tidy_email_sendgrid
  215. timedesc < "0.8.0"
  216. timedesc-json
  217. timere < "0.4.0"
  218. user-agent-parser
  219. vecosek
  220. vercel
  221. vscoq-language-server
  222. vsrocq-language-server
  223. wasm_of_ocaml-compiler
  224. webauthn
  225. why3find
  226. xapi-rrd >= "1.9.0"
  227. zanuda
  228. zarr

Conflicts

None