Explore Rust integration into VCV Modules

[oubiwann]

There's a nice run-down of the C/C++ integration options for Rust here:

• https://slint-ui.com/blog/rust-and-cpp.html

[oubiwann]

cbindgen looks like it might be the best fit:

• https://lib.rs/crates/cbindgen
• https://github.com/eqrion/cbindgen/blob/master/docs.md

[oubiwann]

Rust's C support will need to be used in conjunction with cbindgen:

• https://docs.rust-embedded.org/book/interoperability/rust-with-c.html

[oubiwann]

Come to think of it, we're probably going to want to pull in some C/C++ stuff that's used by all VCV Rack modules. So more links:

• https://docs.rust-embedded.org/book/interoperability/c-with-rust.html
• https://github.com/rust-lang/rust-bindgen
• https://rust-lang.github.io/rust-bindgen/tutorial-0.html
• https://fitzgeraldnick.com/2016/12/14/using-libbindgen-in-build-rs.html

[oubiwann]

This is another option:

• https://cxx.rs/tutorial.html
• https://github.com/dtolnay/cxx/tree/master/demo

[oubiwann]

This was EXTREMELY difficult to try ... basically, the only thing I got working was Rust enums.

Thing is, even if I had gotten it working, I would have had to bail: the size of my modules would have been orders of magnitude larger than any of the modules in the VCV Rack community. Probably a non-starter for most potential users.