HelloHere is the latest OCaml Weekly News, for the week of May 28 to June 04,
2019.
Table of Contents ─────────────────Is there a tool to do automatic serialization/deserialization AND automatic schema migration (from OCaml types)?
A module for printing a tree to a terminal like the 'tree' command ppx_enum v0.0.1 Dungeon crawler game Coccinelle engineer position ppx_bsx 2.0.0 Other OCaml News Old CWNIs there a tool to do automatic serialization/deserialization AND automatic schema migration (from OCaml types)?
════════════════════════════════════════════════════════════════════════════════════════════════════════════════ Archive: <https://discuss.ocaml.org/t/is-there-a-tool-to-do-automatic-serialization-deserialization-and-automatic-schema-migration-from-ocaml-types/2606/9> Deep in this thread, Jared Forsyth announced ────────────────────────────────────────────Well I went ahead and made one 😅 would love to hear your thoughts
<https://jaredforsyth.com/posts/announcing-milk/> A module for printing a tree to a terminal like the 'tree' command ══════════════════════════════════════════════════════════════════ Archive: <https://discuss.ocaml.org/t/a-module-for-printing-a-tree-to-a-terminal-like-the-tree-command/3879/1> Martin Jambon announced ───────────────────────Today I made [a module for printing trees] in a readable fashion. The
output looks like the output of the [tree command]: <https://aws1.discourse-cdn.com/standard11/uploads/ocaml/original/2X/b/bf5f6580cdbe190d643bb0b7a996c216c54d4b69.png> It works on any data structure that supports `get_name' and`get_children' functions and depends on nothing else than the OCaml
standard library.I'm releasing it into the Public Domain in the hope others find it useful. Anyone is welcome to include it in their projects or turn it
into a proper open-source project that they maintain. [a module for printing trees] <https://gist.github.com/mjambon/75f54d3c9f1a352b38a8eab81880a735> [tree command] <https://en.wikipedia.org/wiki/Tree_(command)> ppx_enum v0.0.1 ═══════════════Archive: <https://discuss.ocaml.org/t/ann-ppx-enum-v0-0-1/3875/1>
James Owen announced ────────────────────Cryptosense is happy to announce the initial release of `ppx_enum' !
`ppx_enum' is a ppx to derive enum-like modules from variantdefinitions. It’s inspired by the enum declaration syntax in Python,
and various other languages.Enums are bare variants that are intended to represent a flag that can have more values than just true and false. The idea is that `ppx_enum'
makes it easier to work with enums, in particular handling theconversion to and from strings. This is useful when (de)serializing values (for example, when serializing to store in a database), and
cuts down on repetitive boilerplate code. Consider the following simple example: ┌──── │ type my_enum = │ | Foo │ | Bar │ | Baz │ [@@deriving enum] └────The use of `[@@deriving enum]' will generate the following functions:
┌──── │ let my_enum_to_string = function │ | Foo -> "Foo" │ | Bar -> "Bar" │ | Baz -> "Baz" │ │ let my_enum_from_string = function │ | "Foo" -> Ok Foo │ | "Bar" -> Ok Bar │ | "Foo" -> Ok Foo │ | _ -> Error ... │ │ let my_enum_from_string_exn = function │ | "Foo" -> Foo │ | "Bar" -> Bar │ | "Foo" -> Foo │ | _ -> invalid_arg ... └────Since we found this was something we were doing a lot in our code, the
use of `ppx_enum' has improved readability, reduced the need forboilerplate tests and made the conversions less error prone (as it eliminates bugs caused by typos in the string conversion methods).
It’s in a beta release at this point so any feedback is appreciated!
You can find it on [github ] and [opam]! [github ] <https://github.com/cryptosense/ppx_enum> [opam] <https://opam.ocaml.org/packages/ppx_enum/> Dungeon crawler game ════════════════════Archive: <https://discuss.ocaml.org/t/dungeon-crawler-game/3850/2>
Continuing this thread, Bramford Horton said ────────────────────────────────────────────Cool. I see you've made heavy use of the object system. If you're interested in games built using the more idiomatic functional/ocaml approach (i.e. modules), you should check out [a-nikolaev/wanderers].
I also wrote [bramford/2d-exploration-game] - a simpleterminal/ncurses game while I was learning ocaml. I tried a couple of different approaches using the module system. I never felt that I got it quite right so while it is quite simple, it may not be the best
example. [a-nikolaev/wanderers] <https://github.com/a-nikolaev/wanderers> [bramford/2d-exploration-game] <https://github.com/bramford/2d-exploration-game> Florent Monnier also said ─────────────────────────On my side I started a shmup game with abstract graphics because I'm fond of Kenta Cho games, not yet in a git repository, I put it in a gist: <https://gist.github.com/fccm/ade9aee7b4594dc9c130b40098ad92ab>
Quite functional too, only shot and missed variables are imperative.
Florent Monnier then added ────────────────────────── I updated it to remove the dependencies on ageom and timeline by including the pieces of code used: [shmup_av10.ml]As there is only one source code file, you can run it directly with
ocaml: ┌──── │ opam install ocamlsdl2 └──── If you're using SDL2 version 2.0.9, or if you installed an older version: ┌──── │ opam install ocamlsdl2.0.02 └──── Then you can run the game with: ┌──── │ eval $(opam env) │ ocaml -I $(ocamlfind query sdl2) sdl2.cma shmup_av10.ml └────I created a [basic webpage] for this game, there are screenshots and
an executable binary for Windows. [shmup_av10.ml] <https://gist.github.com/fccm/ade9aee7b4594dc9c130b40098ad92ab>[basic webpage] <http://www.linux-nantes.org/~fmonnier/ocaml/shmup_av/>
Coccinelle engineer position ════════════════════════════ Archive: <https://discuss.ocaml.org/t/coccinelle-engineer-position/3881/1> Julia Lawall announced ──────────────────────Despite our old fashioned web site (<http://coccinelle.lip6.fr>) and
insufficient manpower to accept many external contributions, theCoccinelle team is looking for an engineer to work on the Cocinelle implementation for 2 years starting in September 2019. Coccinelle is a program transformation tool for C code, written in OCaml, primarily
targeting the Linux kernel. The position will be at Inria-Paris(concretely at LIP6). A masters degree is required (relevant work experience might be acceptable). Good knowledge of OCaml or another
functional programming language, familiarity with C code, andexperience with program analysis (eg in a compiler course) would be helpful. There is no constraint on nationality or requirement to
speak French. Please contact julia.law...@lip6.fr if interested. ppx_bsx 2.0.0 ═════════════ Archive: <https://discuss.ocaml.org/t/ann-ppx-bsx-2-0-0/3882/1> Chen Xian-an announced ────────────────────── If you like me, want to do ReasonReact projects in OCaml but not Reason, I'm happy to announce the release of ppx_bsx: [https://github.com/cxa/ppx_bsx]. [https://github.com/cxa/ppx_bsx] <https://github.com/cxa/ppx_bsx> Other OCaml News ════════════════ From the ocamlcore planet blog ──────────────────────────────Here are links from many OCaml blogs aggregated at [OCaml Planet].
• [Moved to GitHub] • [LablGTK moved to GitHub] [OCaml Planet] <http://ocaml.org/community/planet/> [Moved to GitHub] <http://forge.ocamlcore.org/forum/forum.php?forum_id=967> [LablGTK moved to GitHub] <http://forge.ocamlcore.org/forum/forum.php?forum_id=968> Old CWN ═══════If you happen to miss a CWN, you can [send me a message] and I'll mail it to you, or go take a look at [the archive] or the [RSS feed of the
archives].If you also wish to receive it every week by mail, you may subscribe
[online]. [Alan Schmitt] [send me a message] <mailto:alan.schm...@polytechnique.org> [the archive] <http://alan.petitepomme.net/cwn/>[RSS feed of the archives] <http://alan.petitepomme.net/cwn/cwn.rss>
[online] <http://lists.idyll.org/listinfo/caml-news-weekly/> [Alan Schmitt] <http://alan.petitepomme.net/>
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