package lwt

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

Install

Dune Dependency

github.com Readme Changelog MIT License Edit opam file Versions (46)

Authors

  1. J
    Jérôme Vouillon
  2. J
    Jérémie Dimino

Maintainers

  1. R
    Raphaël Proust <code@bnwr.net>
  2. Anton Bachin

Sources

5.7.0.tar.gz
md5=737039d29d45b2d2b35db6931c8d75c6
sha512=42e629920783428673b99c9d7a639237c9e6b35079b5d907bc67e7ea506acf9edadc48cec580bdcfd2410ed9412bf5e6bcc8b09de2fa7d35ce1490973d05ddd1

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: 17 Aug 2023

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 (5)

  1. ocplib-endian
  2. ocaml >= "4.08"
  3. dune-configurator
  4. dune >= "1.8.0"
  5. 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 >= "0.11.0"
  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 < "4.4.0" | >= "4.8.1"
  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
  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
  41. capnp-rpc-unix >= "0.9.0"
  42. caqti-lwt >= "0.11.0"
  43. caqti-mirage
  44. carton
  45. carton-git
  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. coap
  60. coap-server-lwt
  61. coclobas
  62. cohttp-curl-lwt
  63. cohttp-lwt
  64. cohttp-lwt-jsoo
  65. cohttp-lwt-unix >= "1.1.1"
  66. cohttp-lwt-unix-nossl
  67. cohttp-lwt-unix-ssl
  68. cohttp-mirage
  69. cohttp-server-lwt-unix
  70. comby
  71. comby-semantic
  72. conan-lwt
  73. conduit-lwt
  74. conduit-lwt-unix
  75. cowabloga >= "0.2.2"
  76. crunch >= "2.0.0"
  77. cstruct-lwt
  78. csv-lwt
  79. csvprovider
  80. ctypes >= "0.15.0" & < "0.21.1"
  81. ctypes-foreign >= "0.21.1"
  82. current
  83. current-albatross-deployer
  84. current_docker
  85. current_examples
  86. current_git
  87. current_github
  88. current_gitlab
  89. current_ocluster
  90. current_rpc >= "0.4"
  91. current_slack
  92. current_web
  93. DkSDKFFIOCaml_Std
  94. dap
  95. data-encoding < "0.1.1"
  96. datakit
  97. datakit-bridge-github
  98. datakit-bridge-local-git
  99. datakit-ci
  100. datakit-client = "0.11.0"
  101. datakit-github
  102. devkit >= "1.2"
  103. dht < "0.2.0"
  104. distributed-lwt
  105. dkim-bin >= "0.6.0"
  106. dkim-mirage
  107. dlm
  108. dns >= "0.19.1" & < "0.20.1"
  109. dns-certify
  110. dns-cli >= "4.6.3"
  111. dns-client < "7.0.0"
  112. dns-client-lwt
  113. dns-client-mirage
  114. dns-forward >= "0.9.0"
  115. dns-forward-lwt-unix
  116. dns-lwt
  117. dns-mirage
  118. dns-resolver
  119. dns-server
  120. dns-stub
  121. dnssd
  122. docker_hub
  123. docteur >= "0.0.2"
  124. docteur-solo5
  125. docteur-unix >= "0.0.5"
  126. doi2bib
  127. dream
  128. dream-httpaf
  129. dream-pure
  130. dream-serve
  131. dropbox
  132. dune-rpc-lwt >= "3.7.0" & != "3.10.0"
  133. dune_watch
  134. earlybird
  135. elasticsearch-cli >= "0.4"
  136. equinoxe
  137. eris-lwt
  138. ethernet
  139. ez_api >= "1.2.0"
  140. ezcurl-lwt
  141. ezirmin
  142. ezjs_min < "0.2"
  143. ezjsonm >= "0.4.2" & < "0.5.0"
  144. ezjsonm-lwt
  145. ezresto
  146. ezresto-directory >= "0.5"
  147. faraday-lwt
  148. faraday-lwt-unix >= "0.6.0"
  149. fat-filesystem >= "0.12.0"
  150. fiber-lwt
  151. flowtype >= "0.72.0"
  152. frenetic < "2.0.0"
  153. fsevents-lwt
  154. fswatch_lwt
  155. fuseau-lwt
  156. gamepad
  157. gdb
  158. gdbprofiler >= "0.3"
  159. git != "1.4.3" & != "1.7.2"
  160. git-cohttp
  161. git-cohttp-mirage
  162. git-cohttp-unix
  163. git-mirage >= "3.0.0"
  164. git-paf
  165. git-unix = "1.11.1" | >= "3.0.0"
  166. github
  167. github-hooks < "0.2.0" | >= "0.4.0"
  168. github-unix >= "4.4.0"
  169. gitlab-unix
  170. gitlab_pipeline_notifier
  171. gluten-lwt
  172. gluten-lwt-unix < "0.4.0"
  173. gluten-mirage < "0.4.0"
  174. graphql-lwt
  175. gremlin
  176. grpc-lwt
  177. guardian
  178. gufo
  179. h1
  180. h1-lwt-unix
  181. h2-lwt
  182. h2-lwt-unix < "0.10.0"
  183. h2-mirage
  184. happy-eyeballs-lwt
  185. happy-eyeballs-mirage
  186. hardcaml < "1.1.0"
  187. hardcaml-examples >= "0.3.0"
  188. hardcaml-framework
  189. hidapi-lwt
  190. hiredis != "0.4"
  191. hl_yaml
  192. hockmd
  193. horned_worm < "0.3.1"
  194. http-lwt-client
  195. http-mirage-client
  196. http-multipart-formdata >= "2.0.0" & < "3.0.0"
  197. http2https
  198. httpaf-lwt-unix
  199. httpun-lwt
  200. httpun-mirage
  201. httpun-ws-lwt
  202. hvsock >= "1.0.2"
  203. i3ipc >= "0.1.4"
  204. imaplet-lwt
  205. influxdb-lwt
  206. inotify >= "2.4"
  207. inquire < "0.3.0"
  208. interface-prime-lwt
  209. iocaml < "0.4.6"
  210. iocaml-kernel >= "0.4.3" & < "0.4.6"
  211. iocamljs-kernel
  212. ip2location
  213. ip2locationio
  214. ip2whois
  215. ipv6-multicast-lwt
  216. irc-client-lwt
  217. irc-client-lwt-ssl
  218. irc-client-tls
  219. irmin < "0.9.6" | = "0.9.10" | >= "0.11.0"
  220. irmin-bench
  221. irmin-chunk
  222. irmin-cli
  223. irmin-client
  224. irmin-containers
  225. irmin-fs >= "2.3.0"
  226. irmin-git >= "2.3.0"
  227. irmin-graphql >= "2.3.0"
  228. irmin-http >= "2.3.0"
  229. irmin-indexeddb
  230. irmin-layers
  231. irmin-mem >= "2.3.0"
  232. irmin-mirage-git >= "2.3.0"
  233. irmin-mirage-graphql >= "2.3.0"
  234. irmin-pack
  235. irmin-server
  236. irmin-test >= "2.3.0"
  237. irmin-unix >= "2.3.0"
  238. irmin-watcher >= "0.3.0"
  239. jerboa
  240. jitsu
  241. joolog
  242. jose < "0.9.0"
  243. js_of_ocaml < "2.5"
  244. js_of_ocaml-lwt >= "3.5.0"
  245. jsoo_broadcastchannel
  246. jsoo_router
  247. jsoo_storage
  248. jupyter >= "2.3.0"
  249. jupyter-kernel >= "0.4"
  250. kafka >= "0.3" & < "0.5"
  251. kafka_lwt
  252. kappa-agents >= "4.1.3"
  253. kappa-binaries >= "4.1.3"
  254. kappa-library
  255. ke >= "0.5"
  256. ketrew >= "3.2.0"
  257. kinetic-client < "0.0.3" | >= "0.0.9"
  258. kubecaml
  259. lablqml < "0.6"
  260. lambda-runtime
  261. lambda-term >= "1.13"
  262. lambda_streams_lwt
  263. launchd
  264. ldp
  265. learn-ocaml >= "0.13.0"
  266. learn-ocaml-client >= "0.13.0"
  267. ledgerwallet >= "0.4.0"
  268. letsencrypt
  269. letsencrypt-app
  270. letsencrypt-dns
  271. letters
  272. libres3
  273. links != "0.9"
  274. linol-lwt
  275. llama
  276. lru_cache < "v0.16.0"
  277. lwt-binio < "0.2.0"
  278. lwt-canceler
  279. lwt-dllist
  280. lwt-exit
  281. lwt-parallel >= "1.0.0"
  282. lwt-pipe
  283. lwt-pipeline
  284. lwt-watcher
  285. lwt-zmq < "1.0.0"
  286. lwt_camlp4
  287. lwt_domain
  288. lwt_eio
  289. lwt_glib >= "1.0.1"
  290. lwt_log >= "1.1.0"
  291. lwt_ppx
  292. lwt_ppx_let
  293. lwt_react >= "1.0.1"
  294. lwt_ssl >= "1.0.1"
  295. mariadb < "0.5.1"
  296. markup = "0.7.6"
  297. markup-lwt
  298. mdx
  299. mechaml
  300. mehari-lwt-unix
  301. mehari-mirage
  302. memtrace-mirage
  303. metrics-influx
  304. metrics-lwt
  305. metrics-mirage
  306. metrics-unix
  307. mimic
  308. mindstorm-lwt
  309. mirage >= "0.4.1" & != "0.6.1" & < "0.8.0" | >= "0.10.0" & < "2.7.0"
  310. mirage-block < "1.0.0" | >= "2.0.0"
  311. mirage-block-ccm
  312. mirage-block-combinators
  313. mirage-block-lwt
  314. mirage-block-partition
  315. mirage-block-ramdisk
  316. mirage-block-solo5
  317. mirage-block-unix < "2.3.0" | = "2.8.2" | >= "2.13.0"
  318. mirage-block-xen
  319. mirage-bootvar-solo5 >= "0.2.0"
  320. mirage-bootvar-unix
  321. mirage-bootvar-xen >= "0.4.0"
  322. mirage-channel >= "4.0.0"
  323. mirage-channel-lwt
  324. mirage-clock-freestanding < "3.0.0"
  325. mirage-clock-lwt
  326. mirage-clock-unix >= "1.3.0" & < "3.0.0"
  327. mirage-console >= "3.0.0"
  328. mirage-console-lwt
  329. mirage-console-solo5 >= "0.2.0"
  330. mirage-console-unix >= "2.2.1"
  331. mirage-console-xen >= "5.0.0"
  332. mirage-console-xen-backend
  333. mirage-console-xen-cli
  334. mirage-crypto-entropy
  335. mirage-crypto-rng >= "0.7.0" & < "0.11.0"
  336. mirage-crypto-rng-lwt
  337. mirage-crypto-rng-mirage >= "0.8.8"
  338. mirage-device >= "2.0.0"
  339. mirage-dns < "3.0.0"
  340. mirage-entropy
  341. mirage-flow >= "1.0.3" & < "1.2.0" | >= "2.0.0"
  342. mirage-flow-combinators
  343. mirage-flow-lwt < "1.3.0" | >= "1.5.0"
  344. mirage-flow-rawlink
  345. mirage-flow-unix >= "1.3.0"
  346. mirage-fs >= "3.0.0"
  347. mirage-fs-lwt
  348. mirage-fs-unix < "1.1.1" | >= "1.3.0"
  349. mirage-http
  350. mirage-http-unix
  351. mirage-http-xen
  352. mirage-kv >= "3.0.0"
  353. mirage-kv-lwt
  354. mirage-kv-unix
  355. mirage-logs != "0.3.0"
  356. mirage-nat < "3.0.0"
  357. mirage-net >= "3.0.1"
  358. mirage-net-fd
  359. mirage-net-lwt
  360. mirage-net-macosx
  361. mirage-net-solo5
  362. mirage-net-unix >= "2.2.0"
  363. mirage-net-xen
  364. mirage-os-shim >= "3.0.0"
  365. mirage-profile
  366. mirage-protocols >= "4.0.0" & < "8.0.0"
  367. mirage-protocols-lwt
  368. mirage-qubes < "0.2" | >= "0.4"
  369. mirage-qubes-ipv4
  370. mirage-random-stdlib >= "0.1.0"
  371. mirage-runtime >= "3.7.0"
  372. mirage-solo5
  373. mirage-stack >= "2.0.0" & < "4.0.0"
  374. mirage-stack-lwt
  375. mirage-time >= "2.0.0"
  376. mirage-time-lwt
  377. mirage-time-unix
  378. mirage-types-lwt < "3.7.1"
  379. mirage-unix >= "3.0.0"
  380. mirage-vnetif
  381. mirage-vnetif-stack
  382. mirage-www >= "1.1.0"
  383. mirage-xen
  384. mirror
  385. monorobot
  386. moonpool-lwt
  387. mqtt >= "0.0.2"
  388. mrmime >= "0.5.0"
  389. multipart-form-data >= "0.2.0"
  390. multipart_form >= "0.2.0" & < "0.4.0"
  391. multipart_form-cohttp-lwt < "0.6.0"
  392. multipart_form-lwt
  393. mwt
  394. naboris
  395. nanomsg
  396. nbd = "2.1.1" | >= "4.0.3"
  397. nbd-tool
  398. nbd-unix
  399. netchannel
  400. nocrypto >= "0.5.4"
  401. nottui-lwt
  402. nproc
  403. nsq >= "0.4.0"
  404. obrowser
  405. obuilder
  406. obus >= "1.2.1"
  407. ocaml-variants >= "4.00.1+mirage-unix" & < "4.00.1+open-types"
  408. ocluster
  409. ocluster-api
  410. ocluster-worker
  411. ocplib-concur
  412. ocplib-resto
  413. ocsigenserver >= "2.10"
  414. ocsipersist
  415. ocsipersist-dbm
  416. ocsipersist-lib
  417. ocsipersist-pgsql
  418. ocsipersist-sqlite
  419. octez-distributed-lwt-internal
  420. octez-internal-libs
  421. octez-l2-libs
  422. octez-libs
  423. octez-proto-libs
  424. octez-protocol-compiler
  425. octez-proxy-server
  426. octez-rpc-process
  427. octez-shell-libs
  428. octez-smart-rollup-wasm-benchmark-lib
  429. odoc >= "2.0.0" & < "2.1.0"
  430. oframl
  431. ojquery
  432. ojs-base
  433. ojs_base
  434. omigrate
  435. oneffs
  436. opam-sync-github-prs
  437. openflow < "0.2.0"
  438. opentelemetry-client-cohttp-lwt
  439. opentelemetry-cohttp-lwt >= "0.4"
  440. opentelemetry-lwt
  441. opium >= "0.11.0" & != "0.16.0"
  442. opium-graphql
  443. opium_kernel
  444. opomodoro
  445. order-i3-xfce
  446. ordma >= "0.0.3"
  447. oskel >= "0.3.0"
  448. ounit-lwt < "2.2.0"
  449. ounit2-lwt
  450. owork
  451. ox < "1.1.0"
  452. ozulip
  453. paf
  454. paf-cohttp
  455. passage
  456. pcap-format >= "0.3.3" & < "0.5.0"
  457. petrol
  458. pgx_lwt
  459. pgx_lwt_mirage
  460. pgx_lwt_unix < "2.0"
  461. piaf < "0.2.0"
  462. picos >= "0.3.0" & < "0.5.0"
  463. picos_lwt
  464. picos_meta
  465. plebeia >= "2.0.0"
  466. plist-xml-lwt
  467. plotkicadsch >= "0.4.0"
  468. ppx_defer >= "0.4.0"
  469. ppx_deriving_rpc
  470. ppx_json_types
  471. ppx_netblob
  472. ppx_rapper_lwt
  473. ppx_sqlexpr
  474. proc-smaps
  475. prof_spacetime
  476. prometheus
  477. prometheus-app
  478. promise_jsoo_lwt
  479. protocol-9p >= "0.10.0"
  480. protocol-9p-unix
  481. qcow >= "0.8.1"
  482. qcow-format < "0.3"
  483. qcow-tool
  484. qfs = "0.5" | >= "0.7"
  485. quests
  486. rawlink >= "1.0" & < "2.1"
  487. rawlink-lwt
  488. rdf_json_ld
  489. rdf_lwt
  490. redis-lwt
  491. reparse-lwt
  492. reparse-lwt-unix
  493. resource-pooling >= "0.3.2"
  494. resp
  495. resp-mirage >= "0.10.0"
  496. resp-unix >= "0.10.0"
  497. resto
  498. resto-cohttp-client >= "0.4"
  499. resto-cohttp-self-serving-client
  500. resto-cohttp-server >= "0.4" & < "0.6" | >= "0.9"
  501. resto-directory >= "0.4"
  502. riak
  503. ringo-lwt
  504. river
  505. rock
  506. rpc >= "1.5.1" & < "7.1.0"
  507. rpclib-js
  508. rpclib-lwt
  509. SZXX < "4.0.0"
  510. sanddb
  511. scgi
  512. sendmail-lwt
  513. sendmail-mirage
  514. serial
  515. server-reason-react
  516. session-cohttp-lwt
  517. session-cookie-lwt
  518. session-postgresql-lwt >= "0.4.1"
  519. sessions
  520. shared-block-ring < "2.3.0" | >= "3.0.0"
  521. shared-memory-ring >= "1.2.0" & < "2.0.0"
  522. shared-memory-ring-lwt
  523. sherlodoc
  524. sihl < "0.2.0"
  525. slack
  526. slacko
  527. slipshow
  528. smtml >= "0.3.1"
  529. socket-daemon < "0.3.0"
  530. speed
  531. spin < "0.8.0"
  532. spoke
  533. spotify-web-api < "0.2.1"
  534. sqlexpr = "0.7.1" | >= "0.9.0"
  535. statsd-client
  536. stk
  537. stog >= "0.16.0"
  538. swapfs
  539. syguslib-utils
  540. syndic >= "1.4" & < "1.6.0"
  541. tar-format >= "0.4.1"
  542. tar-mirage
  543. tar-unix
  544. tcpip >= "3.1.1" & < "3.4.1" | >= "4.1.0"
  545. teash
  546. telegraml
  547. terminus
  548. tezos-base >= "13.0"
  549. tezos-clic >= "13.0"
  550. tezos-crypto >= "13.0"
  551. tezos-crypto-dal
  552. tezos-error-monad >= "8.0" & < "9.0" | >= "13.0"
  553. tezos-lwt-result-stdlib >= "9.0"
  554. tezos-p2p >= "11.0" & < "13.0"
  555. tezos-protocol-compiler >= "13.0"
  556. tezos-protocol-environment >= "13.0"
  557. tezos-proxy >= "17.1"
  558. tezos-proxy-server
  559. tezos-stdlib
  560. tezos-stdlib-unix >= "8.0" & < "9.0" | >= "13.0"
  561. tezos-test-helpers >= "12.0"
  562. tezos-wasmer
  563. tezos-webassembly-interpreter-extra
  564. tezt
  565. tftp
  566. themoviedb
  567. tidy_email
  568. timmy-lwt
  569. tls = "0.10.1" | >= "0.10.6" & < "0.16.0"
  570. tls-lwt
  571. tls-mirage
  572. transmission-rpc
  573. tube >= "4.3.0"
  574. tuntap >= "1.0.0" & < "1.7.0" | >= "2.0.0"
  575. twirp_cohttp_lwt_unix
  576. typerex-lldb
  577. u2f
  578. uring
  579. uspf
  580. uspf-lwt
  581. uspf-mirage
  582. utop >= "1.4.0"
  583. uwt >= "0.3.0"
  584. vchan >= "0.9.7" & < "2.0.0" | >= "2.0.3"
  585. vchan-unix
  586. vchan-xen
  587. vercel
  588. vhd-format >= "0.7.0" & < "0.8.0"
  589. vhd-format-lwt >= "0.12.0"
  590. vhd-tool < "0.12.0"
  591. vmnet >= "1.3.2"
  592. vpnkit >= "0.2.0"
  593. vue-jsoo < "0.3"
  594. wayland < "2.0"
  595. webauthn
  596. websocket < "2.3"
  597. xe-unikernel-upload
  598. xen-api-client < "0.9.14"
  599. xen-block-driver
  600. xen-evtchn < "1.0.6" | >= "2.0.0"
  601. xen-evtchn-unix
  602. xen-gnt >= "2.2.3"
  603. xen-gnt-unix >= "4.0.2"
  604. xenctrl < "0.9.29" | >= "0.9.32"
  605. xenstore >= "1.3.0"
  606. xenstore_transport >= "1.0.0"
  607. xentropyd
  608. xlsx2csv
  609. yocaml_git
  610. yocaml_unix < "2.0.0"
  611. yurt < "0.3"
  612. zarr-lwt
  613. zmq-lwt >= "5.2.1"

Conflicts

None

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