rust analyzer reports only syntax error.

[xcpky]

I am using latest rustc 1.61.0 and the latest rust-analyzer on macOS 12, when I open an rs file by helix-editor, it will only report syntax error as the picture shows. And if there are no syntax errors, no errors are reported. When I open the file, the red errors signs in line 2 and line 3 appear for 1 second and then disappear. See the video below

172997535-ad817385-75f0-4a32-8914-26ac8312ea74.mov

.

[xcpky]

the same is for vscode

[bjorn3]

For vscode you didn't save the file. cargo check only runs when you save a file as it can only read files from the disk and not from the memory of your editor.

[xcpky]

For vscode you didn't save the file. cargo check only runs when you save a file as it can only read files from the disk and not from the memory of your editor.

is there a way to use the check without saving? I find the rust official extension in vscode can do such thing.

[lnicola]

Some things are already checked:

I set

    "editor.semanticTokenColorCustomizations": {
        "rules": {
            "unresolvedReference": "#ff0000",
        },
    }

for the red variable and enabled rust-analyzer.diagnostics.experimental.enable for the type mismatch. But both have some false-positives.

We already have #3107 as a tracking issue for live diagnostics, but it's very long-term.

I find the rust official extension in vscode can do such thing.

The extension you're referring to is now deprecated, and has been unmaintained for a while.