Tracking implementations

[anweiss]

Given the RFC 8610 status of CDDL, it may be prudent to track active implementations. Not sure if it is best to list CDDL implementations at http://cbor.io/impls.html or somewhere else, but figured here would be a good first step.

Will also contribute my own attempt at implementing the spec in Rust as a start :)

Rust: https://github.com/anweiss/cddl (Crates.io) (as of 08/12/2019, partial implementation)
Ruby: https://rubygems.org/gems/cddl/

[cabo]

Hi Andrew,

yes, we should do that! Is there a command line usage for your fledgling tool?

[anweiss]

@cabo sure thing. I've published CLI binaries for various platforms on the Releases page. Some instructions are in the README as well. Still a bit rough around the edges, so might get some odd errors. It's a start nonetheless.

[anweiss]

And similar to cbor.me, I've published an in-browser CDDL conformance checking tool -> https://anweiss.github.io/cddl/. All built from the same Rust code base using WebAssembly. I'll reiterate that it's still rough around the edges, but it works!

[core-bot]

Ah, great! I played around a bit and had problems with constructs of the form: ``` x = { Incident: [+ Incident] ? AdditionalData: [+ ExtensionType] } ``` (From jsoniodef.) If I remove the plus signs, it goes through (but then, the arrays probably should be allowed to have more than one element :-) Will test more over the weekend. Grüße, Carsten

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On Aug 22, 2019, at 23:46, Andrew Weiss ***@***.***> wrote: And similar to cbor.me, I've published an in-browser CDDL conformance checking tool -> https://anweiss.github.io/cddl/. All built from the same Rust code base using WebAssembly. I'll reiterate that it's still rough around the edges, but it works! — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or mute the thread.

[anweiss]

Appreciate the feedback! Good catch! Parsing error on my part. Swap the + with * or some other occurrence indicator ... i..e. 2* ... and it should work. Will fix.

[anweiss]

Fixed. Feel free to refresh and give it a whirl. May need to clear your browser cache to reflect the latest changes. Works on my end now.

Feel free to keep hitting away on any edge cases you can think of. I'll be pushing up a JSON validation feature to this soon as well. Just need to finish going through the control operators and monomorphization of generics.

[hellp]

A little off-topic, but maybe someone is interested here: I wrote a CDDL syntax definition for the Sublime Text editor. I think there is a Rust syntax highlighter that can use .sublime-syntax definitions.

It was really a weekend project for me, and my first real parser/lexer I wrote, so I didn't announce it anywhere yet. It's based on the RFC from March 2019 and pretty complete, IIRC.
https://github.com/hellp/sublime-cddl-syntax

And the same for Python's pygments highlighter, albeit a bit less tested: https://github.com/hellp/pygments-cddl-lexer/

[SebastienGllmt]

We wrote code that generates WASM-compatible Rust code for serialization based off a CDDL spec and open sourced it here https://github.com/Emurgo/cddl-codegen

It has some limitations but it still may be of interest to others. It's based on the wonderful work by @anweiss and he also helped us author this library.

[nomeata]

Not sure if this is the best place to report it, but https://rubygems.org/gems/cddl/ points to http://github.com/cabo/cddl which is 404.

[cabo]

Thanks @nomeata -- I need to fix this pointer. I originally planned to do the usual github thing with that code, but it turns out the code has grown so ugly over the half-decade we developed and evolved CDDL that I think looking at it is more detrimental than useful. If you really want to look at the code, please consider the warning and then extract it from the gem, in which of course you find a copy.

[nomeata]

My reason to look was to see if there was a issue to track implementation of generics (although I notice that I am on 0.8.9, so maybe I should upgrade first)

[anweiss]

FWIW, I've been developing a language server implementation and extension for VSCode. Quick demo here. If anyone is interested in giving it a whirl before I push it to the Marketplace, I'm happy to share the .vsix. Still a bit rough around the edges but it's something. It leverages the same Rust library I've been maintaining, but compiled for wasm.

[anweiss]

As a follow up, I've published a Preview version of the CDDL extension for VSCode to the Marketplace -> https://marketplace.visualstudio.com/items?itemName=anweiss.cddl-languageserver. For anyone that's interested, feel free to give it a whirl and report any bugs at https://github.com/anweiss/cddl/issues. Cheers!

[anweiss]

hey @cabo any updates here?

[christian-bromann]

@anweiss thank you for your work on the Rust implementation, it inspired me to learn about parsers and build a cddl one in TypeScript

NPM: https://www.npmjs.com/package/cddl
GitHub: https://github.com/saucelabs/cddl