PieceSet.cs

using System.Collections.Generic;
using StrongChess.Model.Pieces;

namespace StrongChess.Model.Sets
{
    struct PieceSet<TPieceRule>
        where TPieceRule : IPieceRule, new()
    {
        Bitboard _Positions;
        public PieceSet(Bitboard positions) : this()
        { this._Positions = positions; }

        public IEnumerable<Move> GetMoves(Bitboard friends, Bitboard enemies, bool onlyAttacks = false)
        {
            foreach (var from in _Positions.GetSettedSquares())
	        {
                Bitboard destinations = Rules.For<TPieceRule>().GetMoveBoard(from, friends, enemies);
                if (onlyAttacks) destinations &= enemies;
                foreach (var to in destinations.GetSettedSquares())
                    yield return new Move(from, to);
	        }
        }
    }
}