I think a Visual Studio plugin is a very good start, since the IDE already supports C/C++ and I guess these users are a very important target audience for Rust.

There is also a Rust extension for the IntelliJ platform [0]. It supports some basic IDE features, but the last commit was in February. The Rust extension could fit really good to Jetbrains' new C/C++ IDE CLion.

[0] https://github.com/Vektah/idea-rust

There is Racer https://github.com/phildawes/racer which pretty much works with any IDE.

There's nothing stopping you from porting the code to a Xamarin Studio add-in.

Once we get our plugin repository ready to go, Scrawl [0] will have some support for Rust as well, thanks to some great community projects.

Paul did a quick POC today [1] that added autocomplete, go to def and some basic code intel tooltips.

[0] https://fluentco.de/ [1] https://twitter.com/pzumbrun/status/599017886276026369

This doesn't preclude such a thing