Use expect instead of unwrap_or_else

I just learned about this convenient method provided by Result.
Compared to using unwrap_or_else, I don't need to explicitly call
std::process::exit() and compared to using ? I still get to control
the error string (to include the filename in it).

diff --git a/src/main.rs b/src/main.rs
index ecb0dcda36e88a60fdcecf96275e69b9c967fead..657e481d3386c11e67883350707c33d31cf22ccf 100644 (file)
--- a/src/main.rs
+++ b/src/main.rs
@@ -14,10 +14,8 @@ async fn main() -> Result<(), Box<dyn Error>> {
     }
 
     let config_path = std::path::Path::new(&args[1]);
-    let config = config::load_config(config_path).unwrap_or_else(|e| {
-        eprintln!("Error loading config file {}: {}", args[1], e);
-        std::process::exit(1);
-    });
+    let config = config::load_config(config_path)
+        .expect(format!("Error loading config file {}", args[1]).as_str());
 
     eprintln!("Race: {}", config.name);