rust-analyzer failed to discover workspace in vscode

I guess you don’t have a Cargo.toml file in your project? The rust-analyzer needs a Cargo.toml to detect the workspace.

You could create a new rust project with cargo:

cargo new your-project

cargo will help you create a Cargo.toml file automatically, or you could manually create a Cargo.toml for your existing project.

If this issue keep popping up, perhaps you could check this Github issue for help.

Edit:

You should open your project like this, instead of opening the parent directory of guessing_game. Just try the following steps:

1. cargo new guessing_game_v2;
2. then in VSCode, Choose “File” -> “Open Folder..” -> Choose the new guessing_game_v2 folder
3. and check if it works?

You should make sure that your Cargo.toml is in the root of workspace.