Playing against the computer actually works!

1 files changed, 14 insertions, 10 deletions

diff --git a/src/game.rs b/src/game.rs
index 04bd76a..be9d23d 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -650,6 +650,7 @@ impl GameState {
         return None;
     }
 
+    // TODO: this does not handle the case dragon edge case
     fn check_win(&self) -> Option<WinType> {
         if let Some(w) = self.check_road_win() {
             return Some(w);
@@ -731,17 +732,20 @@ impl Game {
     pub fn query_action_lines(&self) -> String {
         let mut result = String::new();
         let mut newline = true;
-        result += "0. ";
-        for i in 0..self.actions.len() {
-            if i > 1 && newline {
-                // TODO: Is placing the opponent's first stone the zeroeth action?
-                result += &format!("{}. ", i);
-            }
-            result += &format!("{} ", self.actions[i]);
-            if i > 0 && !newline {
-                result.push('\n');
+        let num_actions = self.actions.len();
+        if num_actions > 0 {
+            result += "0. ";
+            for i in 0..num_actions {
+                if i > 1 && newline {
+                    // TODO: Is placing the opponent's first stone the zeroeth action?
+                    result += &format!("{}. ", i);
+                }
+                result += &format!("{} ", self.actions[i]);
+                if i > 0 && !newline {
+                    result.push('\n');
+                }
+                newline = !newline;
             }
-            newline = !newline;
         }
         result
     }