Stream: rust-toolchain

Topic: hello world with interface types?

Carl Sverre (Aug 26 2021 at 20:49):

I am trying to play with interface types and it seems that wasmtime no longer has them enabled? Still trying to grok the ecosystem... Goal is getting something like this compiling so I can play around with types:

#[wasm_bindgen]
pub fn greet(name: &str) -> String {
    format!("hello {}", name)
}

Carl Sverre (Aug 26 2021 at 20:50):

And if wasmtime isn't the best way to go for playing with interface-types... what is?

Carl Sverre (Aug 26 2021 at 20:50):

also I should probably cross post this to wasmtime but not 100% sure how to do that in zulip

Carl Sverre (Aug 26 2021 at 20:53):

cross posted to #wasmtime > hello world for interface types

Peter Huene (Aug 27 2021 at 01:11):

Hi @Carl Sverre. You may want to look at witx-bindgen which has tooling around where we hope interface types is going. With witx-bindgen you can create import and export bindings from a "witx" file that stores a description of an interface. You can also generate bindings for Wasmtime to import an interface to an instance or to call an interface exported by an instance.

Peter Huene (Aug 27 2021 at 01:11):

Additionally, there's wasmlink that can be used to link together independent wasm modules that implement interfaces.

Peter Huene (Aug 27 2021 at 01:14):

Looks like I missed the cross post and Dan already replied, so ignore me :)

Carl Sverre (Aug 27 2021 at 02:18):

haha no worries - this is very helpful. I switched over to witx-bindgen and everything is working great now! thanks

Last updated: Oct 23 2024 at 20:03 UTC