wabt VS wasm-bindgen

https://github.com/WebAssembly/wabt/blob/main/wasm2c/README.... is a straightforward way to take an untrusted application (compiled already to wasm) and turn it into C that you can embed into your application or compile to a linkable DLL. I believe this approach has been used to sandbox untrusted libraries in production by Mozilla: https://hacks.mozilla.org/2021/12/webassembly-and-back-again...

As long as this is happening, might as well try some of my favorites: https://github.com/wasm3/wasm3, https://github.com/WebAssembly/wabt, https://github.com/bytecodealliance/wasmtime

This seems sort of like understanding machine code vs assembly; it's much easier to learn WAT and translate to/from WASM as necessary using the wabt tools [0].

Either way its super cool how simple WebAssembly is, you can really get your hands dirty and understand exactly every detail of how your program runs!

[0] https://github.com/WebAssembly/wabt

You mean this? https://github.com/WebAssembly/wabt/blob/main/wasm2c/README....

That seems like quite an undertaking. But at that point, It would make sense to cut out WASM entirely like https://datastation.multiprocess.io/blog/2022-05-12-sqlite-i...

The .wat file can be compiled to a .wasm using wat2wasm which is part of the WebAssembly Toolkit CLI tools:

it is in C++ https://github.com/WebAssembly/wabt/blob/main/src/tools/wat2wasm.cc

I don't think you are building an application that will use Native Client technologies How to extract source code from Native Client .nexe file, migrate to WebAssembly? #1864 so that would be superfluous, and frankly, useless in your case.

I'm trying to get a basic Rust webassembly program, then porting it to C via wasm2c. The example works, but when I use wasm-bindgen and analyze it with wasm2wat, I get an import "env". The issue is that in C (wasm2c) it comes out as struct Z_env_instance_t; and I can't instantiate it (as in Z_env_instance_t env; to pass it's address to Z_wasm_client_bg_instantiate.

Another strange issue could be seen in the strict class heritage organized definition of the DOM, which can not be handled very well by rust because of a still unsolved bindgen issue (#210).

For a much simpler but less flexible approach there's wasm-pack for creating JS packages from Rust, and wasm-bindgen for easy interop. Both have very good documentation.

We encountered quite a few hurdles on our journey. For one, we had to build our own yew-webtransport and yew-websocket integration from scratch by adding WebTransport definitions to wasm-bindgen (pull request link). We also had to add WebTransport support to the h3 crate (pull request link). co-created by @ten3roberts

Go with your WebAssembly module idea. Since it sounds like your chess engine does not draw a UI, it shouldn't be too difficult. wasm-bindgen will be your best friend.

I've never tried it, but apparently some bindings exist, e.g. https://github.com/rustwasm/wasm-bindgen

So you can either try manipulating the DOM w/ some bindings or draw to canvas.

Google also brings up this GitHub issue.

If you want to learn more on wasm-pack, there is a wasm-pack book as well as some fairly detailed wasm-bindgen docs. There are a few resources for learning Rust itself in the December newsletter. Finally, please get in touch if you would like to see more content on Deno and Fresh. I hope you found the content useful and am keen to hear about possible improvements.

Love the article.

In my mind I see the problem of dynamic linking in rust to have a bunch of overlap with the "I want this rust library to be exposed in my higher level GC'd language with minimal safety/handwritten bindings" problem.

My hunch is that the lack of expressiveness of the C ABI is holding back both. the thing I'd love to see some sort of "higher level than the C ABI" come out. And something like `wasm-bindgen`[0] to exist for more languages.

Here's a link to the rust "interopable_api" proposal! I don't understand all the implications, but it seems to be in the right direction https://github.com/rust-lang/rust/pull/105586

[0]https://rustwasm.github.io/docs/wasm-bindgen/

Rust has https://github.com/rustwasm/wasm-bindgen and https://crates.io/crates/sledgehammer, the latter of which batches together JS calls to reduce the FFI cost. https://dioxuslabs.com/ uses these to great effect.

This seems like it could be super useful for integrating with wasm-bindgen and TypeScript. Last I checked, the types generated by wasm-bindgen left a lot to be desired (no disrespect intended, wasm-bindgen is an awesome project). A few years ago, I contributed the skip_typescript attribute to wasm_bindgen that allowed you to override the type generation by hand-writing your own types (using a custom typescript section), but I wonder if this could simply generate higher quality types without the manual intervention.