Dart/Flutter example documentation?

[autolyticus]

Seeing that the following page specifies that WASI is not supported yet, but however there seem to be active community projects that provide a WASI executor for Dart that supports Dart and even Flutter.

Dart | ❌ | ⏳ | ❌ | ❌

https://www.fermyon.com/wasm-languages/webassembly-language-support

I must confess that I do not have a really good mental model of how WASI works. Does the documentation only mention a language has an implementation for the WASI spec which is provided natively? Or do third-party implementations count?

[itowlson]

@tschneidereit Not sure who is most plugged into this... I recall a Dart/Flutter talk at Wasm I/O but am not sure what state it's in or if it depends on features like GC - do you know? (or do you know someone who does?)

[tschneidereit]

(Sorry, didn't see this earlier)

Dart2Wasm does indeed require GC support, and is generally experimental. But even once we have GC support (hopefully later this year), it's not clear to me that Dart support would be easy to get by: based on the README and files, it looks to me like Dart's Wasm compilation is very browser-focused, so adapting it to use in Spin might be far from trivial.

[tschneidereit]

Oh, and as for the WASI executor for Dart: that's sort of the inverse of what we'd need: it's about running Wasm modules from within Dart, instead of Dart in Wasm. We need the latter because all content we execute in Spin needs to be Wasm.