05fc97e31b
8955: feature: Support standalone Rust files r=matklad a=SomeoneToIgnore  Closes https://github.com/rust-analyzer/rust-analyzer/issues/6388 Caveats: * I've decided to support multiple detached files in the code (anticipating the scratch files), but I found no way to open multiple files in VSCode at once: running `code *.rs` makes the plugin to register in the `vscode.workspace.textDocuments` only the first file, while code actually displays all files later. Apparently what happens is the same as when you have VSCode open at some workplace already and then run `code some_other_file.rs`: it gets opened in the same workspace of the same VSCode with no server to support it. If there's a way to override it, I'd appreciate the pointer. * No way to toggle inlay hints, since the setting is updated for the workspace (which does not exist for a single file opened) > [2021-05-24 00:22:49.100] [exthost] [error] Error: Unable to write to Workspace Settings because no workspace is opened. Please open a workspace first and try again. * No runners/lens to run or check the code are implemented for this mode. In theory, we can detect `rustc`, run it on a file and run the resulting binary, but not sure if worth doing it at this stage. Otherwise imports, hints, completion and other features work. Co-authored-by: Kirill Bulatov <mail4score@gmail.com>
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