Auto-complete for "".chars() and [""].join()

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chars_idea
chars_idea1280×1024 78.6 KB

emacs_chars
vscode_char
vscode_char1026×463 55.7 KB

As a beginner, I'm trying to set up my environment. I found IntelliJ alone shows up the auto-complete for "string".chars() and [""].join() while emacs, vim, and VS Code(RLS and racer) don't. Could you kindly let me know why this is happening if you have any idea?

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You're probably using IntelliJ Rust for IntelliJ, which is its own plugin and doesn't use the RLS.

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Yep, @ThomasdenH is correct. Currently, there are two and a half backends for doing IDE stuff for Rust.

  1. IntelliJ, which has a rust compiler frontend written in Kotlin
  2. Racer, a heuristics based lightweight code-completion tool
  3. RLS, which is the official tool, which uses both the compiler and Racer underneath. In particular, Racer is used for code completion, b/c compiler backend is not capable of that

Thus, all editors except IntelliJ use Racer for completion.

7 Likes
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Yes, I'm using the IntelliJ Rust plugin. Thanks for this!

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Very interesting to know. Thanks for this!