Rust Examples

This folder contains examples that can be run with wasmcloud which are written in Rust.

As much of WebAssembly tooling is written in Rust, Rust currently possesses the best support for WebAssembly and it's emerging standards.

Building individual example components

Example components built in Rust can be compiled similarly to any other wasmcloud project:

wash build

WebAssembly support

As WebAssembly is intended to be a "compilation target" for native Rust code, upstream work is underway to integrate and improve support for the various standards of WebAssembly.

[!NOTE] Don't know what wasm32-unknown-unknown means versus wasm32-wasi-preview1?

wasm32-unknown-unknown is a compile target which deals in core WebAssembly modules (i.e. you're only given access to numbers at this level) wasm32-wasip1 is a compile target that provides richer types, support for more higher level platform APIs wasm32-wasip2 is the next generation compile target with much richer types, higher level APIs like async, streaming, the WIT IDL.

In a sentence, WebAssembly functionality is layered, with wasm32-unknown-unknown being the most basic (only doing operations on numbers) and wasm32-wasip2 being the current most advanced.

Want to learn more?

To learn more about how wasmCloud works, check out the wasmCloud documentation.

To learn more WebAssembly ecosystem language support, check out the SIG Guest Languages Zulip group.

Development on Rust support is stewarded by the Bytecode Alliance.

The Bytecode Alliance maintains a WebAssembly runtime called wasmtime which is written in Rust, and is a great place to start learning about Rust support.