From b137e6ceab0bcfa6dcb65f09a5acf4f4f47962b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Varga=20D=C3=A1vid=20Lajos?=
 <vargadavidlajos@mailbox.unideb.hu>
Date: Fri, 21 Nov 2025 13:01:38 +0100
Subject: [PATCH] implemented constructor by piece_index for enum PieceType

---
 engine/src/piecetype.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/engine/src/piecetype.rs b/engine/src/piecetype.rs
index b79d341..550fac0 100644
--- a/engine/src/piecetype.rs
+++ b/engine/src/piecetype.rs
@@ -16,3 +16,23 @@ pub enum PieceType {
     BlackKing,
 }
 
+impl PieceType {
+
+    pub(in super) fn from_index(idx: u8) -> Self {
+        return match idx {
+            0 => PieceType::WhitePawn,
+            1 => PieceType::WhiteKnight,
+            2 => PieceType::WhiteBishop,
+            3 => PieceType::WhiteRook,
+            4 => PieceType::WhiteQueen,
+            5 => PieceType::WhiteKing,
+            6 => PieceType::BlackPawn,
+            7 => PieceType::BlackKnight,
+            8 => PieceType::BlackBishop,
+            9 => PieceType::BlackRook,
+            10 => PieceType::BlackQueen,
+            11 => PieceType::BlackKing,
+            _ => panic!("invalid piece index! should NEVER appear")
+        }
+    }
+}
\ No newline at end of file