Multi-value is a proposed extension to core WebAssembly that enables functions to return many values, among other things. It is also a pre-requisite for Wasm interface types.
I’ve been adding multi-value support all over the place recently: I added multi-value support to all the various crates in the Rust and WebAssembly toolchain, so that Rust projects can compile down to Wasm code that uses multi-value features. I added multi-value support to Wasmtime, the WebAssembly runtime built on top of the Cranelift code generator, so that it can run Wasm code that uses multi-value features.
Now, as my multi-value efforts are wrapping up, it seems like a good time to reflect on the experience and write up everything that’s been required to get all this support in all these places.
I’ve been adding multi-value support all over the place recently: I added multi-value support to all the various crates in the Rust and WebAssembly toolchain, so that Rust projects can compile down to Wasm code that uses multi-value features. I added multi-value support to Wasmtime, the WebAssembly runtime built on top of the Cranelift code generator, so that it can run Wasm code that uses multi-value features.
Now, as my multi-value efforts are wrapping up, it seems like a good time to reflect on the experience and write up everything that’s been required to get all this support in all these places.
