extracted coords to its own hpp

cpp/src/board.hpp

@@ -4,18 +4,6 @@
 
 #include <string>
 
-struct Coords {
-    int x, y;
-
-    int8_t to_index() const {
-        return this->y * 8 + this->x;
-    }
-
-    static Coords from_index(int idx) {
-        return {idx % 8, idx / 8};
-    }
-};
-
 struct Board {
   private:
     int8_t get_king_of(int8_t colour) const;

cpp/src/coords.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <cstdint>
+
+struct Coords {
+    int x, y;
+
+    int8_t to_index() const {
+        return this->y * 8 + this->x;
+    }
+
+    static Coords from_index(int idx) {
+        return {idx % 8, idx / 8};
+    }
+
+    bool is_within_bounds() const {
+        return this->to_index() < 64;
+    }
+};

cpp/src/pieces/pawn.cpp

@@ -1,4 +1,5 @@
 #include "../board.hpp"
+#include "../coords.hpp"
 #include "../move.hpp"
 #include "piece.hpp"
 

cpp/src/pieces/piece.cpp

@@ -1,6 +1,7 @@
 #include "piece.hpp"
 
 #include "../board.hpp"
+#include "../coords.hpp"
 
 std::vector<Move>
 keep_only_blocking(const std::vector<Move> candidates, const Board& board) {