From 3d93bf0fda9adab71e5966db25f2f355b583f511 Mon Sep 17 00:00:00 2001
From: clfreville2 <clement.freville2@etu.uca.fr>
Date: Tue, 28 Mar 2023 10:43:29 +0200
Subject: [PATCH] Deny moves without any equal sign

---
 board-shared/src/expr.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/board-shared/src/expr.rs b/board-shared/src/expr.rs
index 4374d98..6e27018 100644
--- a/board-shared/src/expr.rs
+++ b/board-shared/src/expr.rs
@@ -80,7 +80,11 @@ pub fn is_valid_guess(board: &Board, positions: &[Position2d]) -> Result<bool, (
 
     let tokens = lexer(&tiles);
     let expressions = parser::parse(&tokens)?;
-    Ok(are_valid_expressions(&expressions))
+    if expressions.len() < 2 {
+        Ok(false)
+    } else {
+        Ok(are_valid_expressions(&expressions))
+    }
 }
 
 /// Convert an infix expression to a postfix expression.