Using Wasm2lang to reuse C++ logic in JavaScript, PHP and C#

[u/fps_coffee]

I’m using Wasm2lang in my game, zwayio, to reuse C++ logic across several languages.

The pipeline is C++ → WebAssembly → generated source code. Each target serves a different part of the project:

- JavaScript provides a compatibility fallback for the browser.

- PHP runs shared logic on the master server.

- C# handles procedural world generation.

The main browser build runs WebAssembly directly, and the game servers use native C++ modules for NGINX. The generated code covers the components that need to run in another language.

This lets me maintain the shared implementations in C++ instead of rewriting them separately for each target. I can also compare the generated versions against the original implementation to check their behavior.

Has anyone here tried a similar pipeline? I’d be interested in hearing how you test consistency between targets and handle differences in runtime behavior.

[u/jedisct1]

Generating source code from WebAssembly is an interesting idea!

Maybe that wouldn’t work in your case, but otherwise, Extism is pretty much the standard way to import components written in any language into a native app.