package lwt

  1. Overview
  2. Docs
Promises and event-driven I/O

Install

Dune Dependency

Authors

Maintainers

Sources

5.5.0.tar.gz
md5=94272fac89c5bf21a89c102b8a8f35a5
sha512=8951b94555e930634375816d71815b9d85daad6ffb7dab24864661504d11be26575ab0b237196c54693efa372a9b69cdc1d5068a20a250dc0bbb4a3c03c5fda1

Description

A promise is a value that may become determined in the future.

Lwt provides typed, composable promises. Promises that are resolved by I/O are resolved by Lwt in parallel.

Meanwhile, OCaml code, including code creating and waiting on promises, runs in a single thread by default. This reduces the need for locks or other synchronization primitives. Code can be run in parallel on an opt-in basis.

Published: 26 Nov 2021

README

Lwt

Lwt is a concurrent programming library for OCaml. It provides a single data type: the promise, which is a value that will become determined in the future. Creating a promise spawns a computation. When that computation is I/O, Lwt runs it in parallel with your OCaml code.

OCaml code, including creating and waiting on promises, is run in a single thread by default, so you don't have to worry about locking or preemption. You can detach code to be run in separate threads on an opt-in basis.

Here is a simplistic Lwt program which requests the Google front page, and fails if the request is not completed in five seconds:

open Lwt.Syntax

let () =
  let request =
    let* addresses = Lwt_unix.getaddrinfo "google.com" "80" [] in
    let google = Lwt_unix.((List.hd addresses).ai_addr) in

    Lwt_io.(with_connection google (fun (incoming, outgoing) ->
      let* () = write outgoing "GET / HTTP/1.1\r\n" in
      let* () = write outgoing "Connection: close\r\n\r\n" in
      let* response = read incoming in
      Lwt.return (Some response)))
  in

  let timeout =
    let* () = Lwt_unix.sleep 5. in
    Lwt.return None
  in

  match Lwt_main.run (Lwt.pick [request; timeout]) with
  | Some response -> print_string response
  | None -> prerr_endline "Request timed out"; exit 1

(* ocamlfind opt -package lwt.unix -linkpkg example.ml && ./a.out *)

In the program, functions such as Lwt_io.write create promises. The let* ... in construct is used to wait for a promise to become determined; the code after in is scheduled to run in a "callback." Lwt.pick races promises against each other, and behaves as the first one to complete. Lwt_main.run forces the whole promise-computation network to be executed. All the visible OCaml code is run in a single thread, but Lwt internally uses a combination of worker threads and non-blocking file descriptors to resolve in parallel the promises that do I/O.


Overview

Lwt compiles to native code on Linux, macOS, Windows, and other systems. It's also routinely compiled to JavaScript for the front end and Node by js_of_ocaml.

In Lwt,

  • The core library Lwt provides promises...

  • ...and a few pure-OCaml helpers, such as promise-friendly mutexes, condition variables, and mvars.

  • There is a big Unix binding, Lwt_unix that binds almost every Unix system call. A higher-level module Lwt_io provides nice I/O channels.

  • Lwt_process is for subprocess handling.

  • Lwt_preemptive spawns system threads.

  • The PPX syntax allows using all of the above without going crazy!

  • There are also some other helpers, such as Lwt_react for reactive programming. See the table of contents on the linked manual pages!


Installing

  1. Use your system package manager to install a development libev package. It is often called libev-dev or libev-devel.

  2. opam install conf-libev lwt


Documentation

We are currently working on improving the Lwt documentation (drastically; we are rewriting the manual). In the meantime:

  • The current manual can be found here.

  • Mirage has a nicely-written Lwt tutorial.

  • An example of a simple server written in Lwt.

  • Concurrent Programming with Lwt is a nice source of Lwt examples. They are translations of code from the excellent Real World OCaml, but are just as useful if you are not reading the book.

Note: much of the current manual refers to 'a Lwt.t as "lightweight threads" or just "threads." This will be fixed in the new manual. 'a Lwt.t is a promise, and has nothing to do with system or preemptive threads.


Contact

Open an issue, visit Discord chat, ask on discuss.ocaml.org, or on Stack Overflow.

Release announcements are made in /r/ocaml, and on discuss.ocaml.org. Watching the repo for "Releases only" is also an option.


Contributing

  • CONTRIBUTING.md contains tips for working on the code, such as how to check the code out, how review works, etc. There is also a high-level outline of the code base.

  • Ask us anything, whether it's about working on Lwt, or any question at all about it :)

  • The documentation always needs proofreading and fixes.

  • You are welcome to pick up any other issue, review a PR, add your opinion, etc.

  • Any feedback is welcome, including how to make contributing easier!


Libraries to use with Lwt

Dependencies (10)

  1. seq
  2. result
  3. ocplib-endian
  4. ocaml-syntax-shims
  5. ocaml >= "4.08.0"
  6. ocaml (>= "4.02.0" & "os" != "win32 " | >= "4.06.0") & < "5.0"
  7. mmap >= "1.1.0" & "os" != "win32"
  8. dune-configurator
  9. dune >= "1.8.0"
  10. cppo build & >= "1.1.0"

Dev Dependencies (1)

  1. ocamlfind dev & >= "1.7.3-1"

  1. 0install >= "2.15.1"
  2. aches-lwt
  3. activitypub
  4. albatross
  5. alcotest-lwt
  6. alcotest-mirage
  7. ambient-context-lwt
  8. amqp-client >= "0.9.0" & < "1.0.2" | >= "1.1.0"
  9. amqp-client-lwt >= "2.0.1"
  10. angstrom-lwt-unix
  11. anthill
  12. anycache-lwt
  13. arakoon < "1.8.6" | >= "1.8.8"
  14. archi-lwt
  15. arp >= "2.3.1"
  16. arp-mirage >= "2.2.1"
  17. awa-lwt
  18. awa-mirage
  19. aws-lwt
  20. aws-s3-lwt
  21. awsm-lwt
  22. azure-cosmos-db
  23. baardskeerder
  24. balancer
  25. bap < "1.0.0"
  26. bap-server < "0.2.0"
  27. bastet_lwt
  28. bimage-lwt
  29. biocaml = "0.4.0"
  30. bistro >= "0.4.0"
  31. brozip
  32. builder
  33. builder-web < "0.2.0"
  34. bun >= "0.3.3"
  35. c3
  36. calculon
  37. caldav
  38. camltc = "0.9.5" | >= "0.9.7.0"
  39. canary
  40. capnp-rpc-lwt < "1.2.3"
  41. capnp-rpc-unix >= "0.9.0" & < "1.2.3"
  42. caqti-lwt >= "0.11.0"
  43. caqti-mirage
  44. carton
  45. carton-git < "0.7.2"
  46. carton-lwt
  47. cf-lwt
  48. chamelon
  49. chamelon-unix
  50. chamo >= "3.0"
  51. channel
  52. charrua-client >= "1.3.0"
  53. charrua-client-lwt
  54. charrua-client-mirage
  55. charrua-core < "0.3"
  56. charrua-unix >= "0.3" & != "0.10"
  57. clz
  58. cmdtui-lambda-term
  59. coclobas
  60. cohttp-curl-lwt
  61. cohttp-lwt
  62. cohttp-lwt-jsoo
  63. cohttp-lwt-unix >= "1.1.1"
  64. cohttp-lwt-unix-nossl
  65. cohttp-lwt-unix-ssl
  66. cohttp-mirage
  67. cohttp-server-lwt-unix
  68. comby
  69. comby-semantic
  70. conan-lwt
  71. conduit-lwt < "7.0.0"
  72. conduit-lwt-unix < "7.0.0"
  73. cowabloga >= "0.2.2"
  74. crunch >= "2.0.0"
  75. cstruct-lwt
  76. csv-lwt
  77. csvprovider
  78. ctypes >= "0.15.0" & < "0.21.1"
  79. ctypes-foreign >= "0.21.1"
  80. current < "0.6.4"
  81. current_docker < "0.6.4"
  82. current_examples < "0.6.4"
  83. current_git < "0.6.4"
  84. current_github < "0.6.4"
  85. current_gitlab < "0.6.4"
  86. current_ocluster < "0.2"
  87. current_rpc >= "0.4" & < "0.6.4"
  88. current_slack < "0.6.4"
  89. current_web < "0.6.4"
  90. DkSDKFFIOCaml_Std
  91. dap
  92. data-encoding < "0.1.1"
  93. datakit
  94. datakit-bridge-github
  95. datakit-bridge-local-git
  96. datakit-ci
  97. datakit-client >= "0.11.0"
  98. datakit-github
  99. datakit-server
  100. devkit >= "1.2"
  101. dht < "0.2.0"
  102. distributed-lwt
  103. dkim-bin >= "0.6.0"
  104. dkim-mirage
  105. dlm
  106. dns >= "0.19.1" & < "0.20.1"
  107. dns-certify
  108. dns-cli >= "4.6.3"
  109. dns-client < "7.0.0"
  110. dns-client-lwt
  111. dns-client-mirage
  112. dns-forward >= "0.9.0"
  113. dns-forward-lwt-unix
  114. dns-lwt
  115. dns-mirage
  116. dns-resolver
  117. dns-server
  118. dns-stub
  119. dnssd
  120. docker_hub
  121. docteur
  122. docteur-solo5
  123. docteur-unix
  124. doi2bib
  125. dream
  126. dream-httpaf
  127. dream-pure
  128. dream-serve
  129. dropbox
  130. dune-rpc-lwt < "3.15.0"
  131. dune_watch
  132. earlybird
  133. elasticsearch-cli >= "0.4"
  134. equinoxe
  135. eris-lwt
  136. ethernet
  137. ez_api
  138. ezcurl-lwt
  139. ezirmin
  140. ezjs_min < "0.2"
  141. ezjsonm >= "0.4.2" & < "0.5.0"
  142. ezjsonm-lwt
  143. ezresto
  144. ezresto-directory >= "0.5"
  145. faraday-lwt
  146. faraday-lwt-unix >= "0.6.0"
  147. fat-filesystem >= "0.12.0"
  148. fiber-lwt
  149. flowtype >= "0.72.0"
  150. frenetic < "2.0.0"
  151. fsevents-lwt
  152. fswatch_lwt
  153. fuseau-lwt
  154. gamepad
  155. gdb
  156. gdbprofiler >= "0.3"
  157. git != "1.4.3" & != "1.7.2"
  158. git-cohttp
  159. git-cohttp-mirage
  160. git-cohttp-unix
  161. git-mirage >= "3.0.0"
  162. git-paf
  163. git-unix = "1.11.1" | >= "3.0.0" & < "3.10.0"
  164. github
  165. github-hooks < "0.2.0" | >= "0.4.0"
  166. github-unix >= "4.4.0"
  167. gitlab-unix
  168. gluten-lwt
  169. gluten-lwt-unix < "0.4.0"
  170. gluten-mirage < "0.4.0"
  171. graphql-lwt
  172. gremlin
  173. grpc-lwt
  174. gufo
  175. h1
  176. h1-lwt-unix
  177. h2-lwt
  178. h2-lwt-unix < "0.10.0"
  179. h2-mirage
  180. happy-eyeballs-lwt
  181. happy-eyeballs-mirage
  182. hardcaml < "1.1.0"
  183. hardcaml-examples >= "0.3.0"
  184. hardcaml-framework
  185. hiredis != "0.4"
  186. hl_yaml
  187. hockmd
  188. horned_worm < "0.3.1"
  189. http-lwt-client
  190. http-mirage-client
  191. http-multipart-formdata >= "2.0.0" & < "3.0.0"
  192. http2https
  193. httpaf-lwt-unix
  194. httpun-lwt
  195. httpun-mirage
  196. httpun-ws-lwt
  197. hvsock >= "1.0.2"
  198. i3ipc >= "0.1.4"
  199. imaplet-lwt
  200. influxdb-lwt
  201. inotify >= "2.4"
  202. inquire < "0.3.0"
  203. interface-prime-lwt
  204. iocaml < "0.4.6"
  205. iocaml-kernel >= "0.4.3" & < "0.4.6"
  206. iocamljs-kernel
  207. ip2location
  208. ip2locationio
  209. ip2whois
  210. ipv6-multicast-lwt
  211. irc-client-lwt
  212. irc-client-lwt-ssl
  213. irc-client-tls
  214. irmin < "0.9.6" | = "0.9.10" | >= "0.11.0"
  215. irmin-bench
  216. irmin-chunk
  217. irmin-cli
  218. irmin-containers
  219. irmin-fs >= "2.3.0"
  220. irmin-git >= "2.3.0"
  221. irmin-graphql >= "2.3.0"
  222. irmin-http >= "2.3.0"
  223. irmin-indexeddb
  224. irmin-layers
  225. irmin-mem >= "2.3.0"
  226. irmin-mirage-git >= "2.3.0"
  227. irmin-mirage-graphql >= "2.3.0"
  228. irmin-pack
  229. irmin-server
  230. irmin-test >= "2.3.0"
  231. irmin-unix >= "2.3.0"
  232. irmin-watcher >= "0.3.0"
  233. jerboa
  234. jitsu
  235. joolog
  236. jose < "0.9.0"
  237. js_of_ocaml < "2.5"
  238. js_of_ocaml-lwt >= "3.5.0"
  239. jsoo_broadcastchannel
  240. jsoo_router
  241. jsoo_storage
  242. jupyter >= "2.3.0"
  243. jupyter-kernel >= "0.4"
  244. kafka >= "0.3" & < "0.5"
  245. kafka_lwt
  246. kappa-library
  247. ke >= "0.5"
  248. ketrew >= "3.2.0"
  249. kinetic-client < "0.0.3" | >= "0.0.9"
  250. kubecaml
  251. lablqml < "0.6"
  252. lambda-runtime
  253. lambda-term >= "1.13"
  254. lambda_streams_lwt
  255. launchd
  256. ldp
  257. learn-ocaml >= "0.13.0"
  258. learn-ocaml-client >= "0.13.0"
  259. letsencrypt
  260. letsencrypt-app
  261. letsencrypt-dns
  262. letters
  263. libres3
  264. links != "0.9"
  265. linol-lwt
  266. llama
  267. lru_cache < "v0.16.0"
  268. lwt-binio < "0.2.0"
  269. lwt-canceler
  270. lwt-dllist
  271. lwt-exit
  272. lwt-parallel >= "1.0.0"
  273. lwt-pipe
  274. lwt-pipeline
  275. lwt-watcher
  276. lwt-zmq < "1.0.0"
  277. lwt_camlp4
  278. lwt_domain < "0.3.0"
  279. lwt_eio < "0.4"
  280. lwt_glib >= "1.0.1"
  281. lwt_log >= "1.1.0"
  282. lwt_ppx
  283. lwt_ppx_let
  284. lwt_react >= "1.0.1"
  285. lwt_ssl >= "1.0.1"
  286. mariadb < "0.5.1"
  287. markup = "0.7.6"
  288. markup-lwt
  289. mdx
  290. mechaml
  291. memtrace-mirage
  292. metrics-influx
  293. metrics-lwt
  294. metrics-mirage
  295. metrics-unix
  296. mimic
  297. mindstorm-lwt
  298. mirage >= "0.4.1" & != "0.6.1" & < "0.8.0" | >= "0.10.0" & < "2.7.0"
  299. mirage-block < "1.0.0" | >= "2.0.0"
  300. mirage-block-ccm
  301. mirage-block-combinators
  302. mirage-block-lwt
  303. mirage-block-ramdisk
  304. mirage-block-solo5
  305. mirage-block-unix < "2.3.0" | = "2.8.2" | >= "2.13.0"
  306. mirage-block-xen
  307. mirage-bootvar-solo5 >= "0.2.0"
  308. mirage-bootvar-unix
  309. mirage-bootvar-xen >= "0.4.0"
  310. mirage-channel >= "4.0.0"
  311. mirage-channel-lwt
  312. mirage-clock-freestanding < "3.0.0"
  313. mirage-clock-lwt
  314. mirage-clock-unix >= "1.3.0" & < "3.0.0"
  315. mirage-console >= "3.0.0"
  316. mirage-console-lwt
  317. mirage-console-solo5 >= "0.2.0"
  318. mirage-console-unix >= "2.2.1"
  319. mirage-console-xen >= "5.0.0"
  320. mirage-console-xen-backend
  321. mirage-console-xen-cli
  322. mirage-crypto-entropy
  323. mirage-crypto-rng >= "0.7.0" & < "0.11.0"
  324. mirage-crypto-rng-lwt
  325. mirage-crypto-rng-mirage >= "0.8.8"
  326. mirage-device >= "2.0.0"
  327. mirage-dns < "3.0.0"
  328. mirage-entropy
  329. mirage-flow >= "1.0.3" & < "1.2.0" | >= "2.0.0"
  330. mirage-flow-combinators
  331. mirage-flow-lwt
  332. mirage-flow-rawlink
  333. mirage-flow-unix >= "1.3.0"
  334. mirage-fs >= "3.0.0"
  335. mirage-fs-lwt
  336. mirage-fs-unix < "1.1.1" | >= "1.3.0"
  337. mirage-http
  338. mirage-http-unix
  339. mirage-http-xen
  340. mirage-kv >= "3.0.0"
  341. mirage-kv-lwt
  342. mirage-kv-unix < "3.0.1"
  343. mirage-logs != "0.3.0"
  344. mirage-nat < "3.0.0"
  345. mirage-net >= "3.0.1"
  346. mirage-net-fd
  347. mirage-net-lwt
  348. mirage-net-macosx
  349. mirage-net-solo5
  350. mirage-net-unix >= "2.2.0"
  351. mirage-net-xen
  352. mirage-os-shim >= "3.0.0"
  353. mirage-profile
  354. mirage-protocols >= "4.0.0" & < "8.0.0"
  355. mirage-protocols-lwt
  356. mirage-qubes < "0.2" | >= "0.4" & < "0.9.4"
  357. mirage-qubes-ipv4 < "0.9.4"
  358. mirage-random-stdlib >= "0.1.0"
  359. mirage-runtime >= "3.7.0"
  360. mirage-solo5
  361. mirage-stack >= "2.0.0" & < "4.0.0"
  362. mirage-stack-lwt
  363. mirage-time >= "2.0.0"
  364. mirage-time-lwt
  365. mirage-time-unix
  366. mirage-types-lwt < "3.7.1"
  367. mirage-unix >= "3.0.0"
  368. mirage-vnetif
  369. mirage-vnetif-stack
  370. mirage-www >= "1.1.0"
  371. mirage-xen
  372. mirror
  373. monorobot
  374. moonpool-lwt
  375. mqtt = "0.0.2"
  376. mrmime >= "0.5.0"
  377. multipart-form-data >= "0.2.0"
  378. multipart_form >= "0.2.0" & < "0.4.0"
  379. multipart_form-cohttp-lwt < "0.6.0"
  380. multipart_form-lwt
  381. mwt
  382. naboris
  383. nanomsg
  384. nbd = "2.1.1" | >= "4.0.3"
  385. nbd-tool
  386. nbd-unix
  387. netchannel
  388. nocrypto >= "0.5.4"
  389. nottui-lwt
  390. nproc
  391. nsq >= "0.4.0"
  392. obrowser
  393. obuilder < "0.5"
  394. obus >= "1.2.1"
  395. ocaml-variants >= "4.00.1+mirage-unix" & < "4.00.1+open-types"
  396. ocluster < "0.2"
  397. ocluster-api < "0.2"
  398. ocplib-concur
  399. ocplib-resto
  400. ocsigen-start >= "4.1.0" & < "4.7.0"
  401. ocsigenserver >= "2.10"
  402. ocsipersist
  403. ocsipersist-dbm
  404. ocsipersist-lib
  405. ocsipersist-pgsql
  406. ocsipersist-sqlite
  407. odoc >= "2.0.0" & < "2.1.0"
  408. oframl
  409. ojquery
  410. ojs-base
  411. ojs_base
  412. omigrate
  413. oneffs
  414. opam-compiler < "0.2.0"
  415. opam-sync-github-prs
  416. openflow < "0.2.0"
  417. opentelemetry-client-cohttp-lwt
  418. opentelemetry-cohttp-lwt >= "0.4"
  419. opentelemetry-lwt
  420. opium >= "0.11.0" & != "0.16.0"
  421. opium-graphql
  422. opium_kernel
  423. opomodoro
  424. order-i3-xfce
  425. ordma >= "0.0.3"
  426. osc-lwt
  427. oskel >= "0.3.0"
  428. ounit-lwt < "2.2.0"
  429. ounit2-lwt
  430. owork
  431. ox < "1.1.0"
  432. ozulip
  433. paf
  434. paf-cohttp
  435. passage
  436. pcap-format >= "0.3.3" & < "0.5.0"
  437. petrol
  438. pgx_lwt
  439. pgx_lwt_mirage
  440. pgx_lwt_unix < "2.0"
  441. piaf < "0.2.0"
  442. plebeia >= "2.0.0"
  443. plist-xml-lwt
  444. plotkicadsch >= "0.4.0"
  445. ppx_defer >= "0.4.0"
  446. ppx_deriving_rpc
  447. ppx_json_types
  448. ppx_netblob
  449. ppx_rapper_lwt
  450. ppx_sqlexpr
  451. proc-smaps
  452. prof_spacetime
  453. prometheus
  454. prometheus-app
  455. promise_jsoo_lwt
  456. protocol-9p >= "0.10.0"
  457. protocol-9p-unix
  458. qcow >= "0.8.1"
  459. qcow-format < "0.3"
  460. qcow-tool
  461. qfs = "0.5" | >= "0.7"
  462. quests
  463. rawlink >= "1.0" & < "2.1"
  464. rawlink-lwt
  465. rdf_json_ld < "1.0.0"
  466. rdf_lwt < "1.0.0"
  467. redis-lwt
  468. reparse-lwt
  469. reparse-lwt-unix
  470. resource-pooling >= "0.3.2"
  471. resp
  472. resp-mirage >= "0.10.0"
  473. resp-unix >= "0.10.0"
  474. resto
  475. resto-cohttp-client >= "0.4"
  476. resto-cohttp-self-serving-client
  477. resto-cohttp-server >= "0.4"
  478. resto-directory >= "0.4"
  479. riak
  480. ringo-lwt
  481. river
  482. rock
  483. rpc >= "1.5.1" & < "7.1.0"
  484. rpclib-js
  485. rpclib-lwt
  486. SZXX < "4.0.0"
  487. sanddb
  488. scgi
  489. sendmail-lwt
  490. sendmail-mirage
  491. serial
  492. session-cohttp-lwt
  493. session-cookie-lwt
  494. session-postgresql-lwt >= "0.4.1"
  495. sessions
  496. shared-block-ring < "2.3.0" | >= "3.0.0"
  497. shared-memory-ring >= "1.2.0" & < "2.0.0"
  498. shared-memory-ring-lwt
  499. sihl < "0.2.0"
  500. slack
  501. slacko
  502. slipshow
  503. smtml >= "0.3.1"
  504. socket-daemon < "0.3.0"
  505. speed
  506. spin < "0.8.0"
  507. spotify-web-api < "0.2.1"
  508. sqlexpr = "0.7.1" | >= "0.9.0"
  509. statsd-client
  510. stk
  511. stog >= "0.16.0" & < "1.0.0"
  512. syguslib-utils
  513. syndic >= "1.4" & < "1.6.0"
  514. tar-format >= "0.4.1"
  515. tar-mirage < "2.2.0"
  516. tar-unix < "3.0.0"
  517. tcpip >= "3.1.1" & < "3.4.1" | >= "4.1.0"
  518. teash
  519. telegraml
  520. terminus
  521. tezos-base >= "13.0" & < "15.0"
  522. tezos-clic >= "13.0" & < "15.0"
  523. tezos-crypto >= "13.0" & < "15.0"
  524. tezos-error-monad >= "8.0" & < "9.0" | >= "13.0" & < "15.0"
  525. tezos-lwt-result-stdlib >= "9.0" & < "15.0"
  526. tezos-p2p >= "11.0" & < "13.0"
  527. tezos-protocol-compiler >= "13.0"
  528. tezos-protocol-environment >= "13.0" & < "15.0"
  529. tezos-proxy-server
  530. tezos-stdlib < "15.0"
  531. tezos-stdlib-unix < "9.0" | >= "13.0" & < "15.0"
  532. tezos-test-helpers >= "12.0" & < "15.0"
  533. tezt < "3.0.0"
  534. tftp
  535. themoviedb
  536. tidy_email
  537. timmy-lwt
  538. tls = "0.10.1" | >= "0.10.6" & < "0.16.0"
  539. tls-lwt < "0.17.4"
  540. tls-mirage
  541. transmission-rpc
  542. tube >= "4.3.0"
  543. tuntap >= "1.0.0" & < "1.7.0" | >= "2.0.0"
  544. twirp_cohttp_lwt_unix
  545. typerex-lldb
  546. u2f
  547. uring
  548. uspf
  549. uspf-lwt
  550. uspf-mirage
  551. utop >= "1.4.0"
  552. uwt >= "0.3.0"
  553. vchan >= "0.9.7" & < "2.0.0" | >= "2.0.3"
  554. vchan-unix
  555. vchan-xen
  556. vercel
  557. vhd-format >= "0.7.0" & < "0.8.0"
  558. vhd-format-lwt >= "0.12.0"
  559. vhd-tool < "0.12.0"
  560. vmnet >= "1.3.2"
  561. vpnkit >= "0.2.0"
  562. vue-jsoo < "0.3"
  563. wayland < "2.0"
  564. webauthn
  565. websocket < "2.3"
  566. xe-unikernel-upload
  567. xen-api-client < "0.9.14"
  568. xen-block-driver
  569. xen-evtchn < "1.0.6" | >= "2.0.0"
  570. xen-evtchn-unix
  571. xen-gnt >= "2.2.3"
  572. xen-gnt-unix >= "4.0.2"
  573. xenctrl < "0.9.29" | >= "0.9.32"
  574. xenstore >= "1.3.0"
  575. xenstore_transport >= "1.0.0"
  576. xentropyd
  577. xlsx2csv
  578. yocaml_git < "2.0.0"
  579. yocaml_unix < "2.0.0"
  580. yurt < "0.3"
  581. zarr-lwt
  582. zmq-lwt

Conflicts (1)

  1. ocaml-variants = "4.02.1+BER"
OCaml

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