The Rust people are hard at work on making the compiler incremental. I don't know if IDE integration is part of the plan, but it would certainly be great if Rus

The Rust people are hard at work on making the compiler incremental. I don't know if IDE integration is part of the plan, but it would certainly be great if Rust could expose the kind of incremental, stateful API that TypeScript does. There's a good talk by Ander Hejlsberg about how it was designed from the ground up to support things like syntax highlighting and autocompletion, on the fly; as I understand, even syntax highlighting can be done by asking the compiler for the AST, as opposed to regexing, and it's all computed and cached as an incrementally built pipeline. I remember using Eclipse for Java development years and years ago, which has an entire incremental Java compiler built in. As a result, it offered lightning-fast error display and autocompletion, because it never needed to compile more than exactly what you were editing. It was amazing, and ever since I have been disappointed that this approach did not catch on elsewhere -- either people didn't know about it, or they chose to ignore it. Even Go -- whose toolchain is very much designed to be run programmatically by apps such as IDEs -- seems to have dropped the ball there. There is an autocompletion daemon (https://github.com/nsf/gocode https://github.com/nsf/gocode), but it's not part of Go.