squash a bunch of commits

Shogi.Domain/ValueObjects/Lance.cs

@@ -0,0 +1,31 @@
+using Shogi.Domain.Pathing;
+using System.Collections.ObjectModel;
+
+namespace Shogi.Domain.ValueObjects
+{
+    internal record class Lance : Piece
+    {
+        public static readonly ReadOnlyCollection<Path> Player1Paths = new(new List<Path>(1)
+        {
+            new Path(Direction.Up, Distance.MultiStep),
+        });
+
+        public static readonly ReadOnlyCollection<Path> Player2Paths =
+            Player1Paths
+            .Select(p => p.Invert())
+            .ToList()
+            .AsReadOnly();
+
+        public Lance(WhichPlayer owner, bool isPromoted = false)
+            : base(WhichPiece.Lance, owner, isPromoted)
+        {
+        }
+
+        public override ReadOnlyCollection<Path> MoveSet => Owner switch
+        {
+            WhichPlayer.Player1 => IsPromoted ? GoldGeneral.Player1Paths : Player1Paths,
+            WhichPlayer.Player2 => IsPromoted ? GoldGeneral.Player2Paths : Player2Paths,
+            _ => throw new NotImplementedException(),
+        };
+    }
+}