{"id":1199,"hash":"796d4694dcc9393caf5eec7e39284ff27d9f6ea08b6efc6e940d6c094e2bb326","pattern":"Idiomatic way to handle errors with an early return in Rust","full_message":"I currently have the below code to handle the case where I want to handle an error without propagation or continue the function. The use case for this is a web server controller, where I would prefer to manual handle possible errors - which is why the return type is HttpResponse.\n\nI want to know if there is a way to do this without this unwrap call as in my understanding the compiler should know there is a way to unwrap to a value at this point with no risk of panic.\n\n    // ...\n    \n    let result: Result<u8, Error> = func_that_could_error();\n    if result.is_err() {\n        return HttpResponse::InternalServerError();\n    }\n    let value: u8 = result.unwrap();\n    \n    // ...","ecosystem":"cargo","package_name":"error-handling","package_version":null,"solution":"If you can, use ?:\n\nlet value = func_that_could_error()?;\n\nOptionally mapping it to your error as @Jmb suggests:\n\nlet value = func_that_could_error()\n    .map_err(|_| HttpResponse::InternalServerError())?;\n\nOtherwise, use let else:\n\nlet Ok(value) = func_that_could_error() else {\n    return HttpResponse::InternalServerError();\n};\n\nOr, for Rust < 1.65, match:\n\nlet value = match func_that_could_error() {\n    Err(_) => return HttpResponse::InternalServerError(),\n    Ok(v) => v,\n};","confidence":0.8,"source":"stackoverflow","source_url":"https://stackoverflow.com/questions/71483124/idiomatic-way-to-handle-errors-with-an-early-return-in-rust","votes":4,"created_at":"2026-04-19T04:52:34.058619+00:00","updated_at":"2026-04-19T04:52:34.058619+00:00"}