ErlLS

Erlang language server.

Supported LSP features

• [ ] [textDocument/definition](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_definition)
  • [x] Module
  • [x] Function
  • [x] Type
  • [x] Record
  • [x] Macro
  • [ ] Variable
  • [x] Include file
• [x] [textDocument/formatting](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_formatting)
  • [x] Formatting documents by using efmt
• [ ] [textDocument/completion](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_completion)
  • [x] Fully qualified function name
  • [x] Fully qualified type name
  • [ ] Record name
  • [ ] Record field name
• [ ] [textDocument/publishDiagnostics](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_publishDiagnostics) (when received textDocument/{didOpen,didSave})
  • [x] Parse errors by efmt
  • [ ] Lint checks
• [ ] [textDocument/rename](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_rename)
• [x] [textDocument/semanticTokens/full](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_semanticTokens)
• [x] [textDocument/semanticTokens/range](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_semanticTokens)

Editor integrations

ErlLS can be used with any LSP clients. Here are a few examples.

Visual Studio Code

Please install erlls extension.

There is no need to install the erlls binary using the $ cargo install command as the extension already includes the WebAssembly build.

Emacs (lsp-mode)

1. Install erlls command.

console $ cargo install erlls

1. Add the following code to your .emacs file.

```emacs (with-eval-after-load 'lsp-mode (add-to-list 'lsp-language-id-configuration '(erlang-mode . "erlang")))

(lsp-register-client (make-lsp-client :new-connection (lsp-stdio-connection "erlls") :activation-fn (lsp-activate-on "erlang") :priority -1 :server-id 'erlls)) ```