use thiserror to format error

Author: ThomasRubini

topics/tic-tac-toe/Cargo.lock

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+thiserror = "2.0.17"

topics/tic-tac-toe/Cargo.toml

@@ -16,7 +16,7 @@ fn main() {
             println!("It's a tie!");
         }
         Err(_e) => {
-            eprintln!("An error occurred");
+            eprintln!("An error occurred: {:?}", _e);
         }
     }
 }

topics/tic-tac-toe/src/main.rs

@@ -1,3 +1,5 @@
+use thiserror::Error;
+
 pub type Position = u8;
 
 pub type Grid = [Option<PlayerID>; 9];
@@ -9,7 +11,10 @@ pub enum PlayerID {
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
+#[derive(Debug, Error)]
 pub enum Error {
+    #[error("{0}")]
     Other(String),
+    #[error("Invalid input")]
     InvalidInput,
 }