Refactor with a Position2d struct

board-shared/src/expr.rs

@@ -2,6 +2,7 @@ use crate::board::Board;
 use crate::lexer::lexer;
 use crate::parser;
 use crate::parser::{Expression, Expressions};
+use crate::position::Position2d;
 use crate::tile::{Operator, Tile};
 
 pub fn calculate(expr: &Expression) -> f64 {
@@ -36,10 +37,10 @@ pub fn are_valid_expressions(expr: &Expressions) -> bool {
     res.is_some()
 }
 
-pub fn is_valid_guess(board: &Board, positions: &[(usize, usize)]) -> Result<bool, ()> {
+pub fn is_valid_guess(board: &Board, positions: &[Position2d]) -> Result<bool, ()> {
     let tiles = positions
         .iter()
-        .map(|&(x, y)| board.get(x, y))
+        .map(|&pos| board.get(pos.x, pos.y))
         .collect::<Option<Vec<Tile>>>()
         .ok_or(())?;