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															+use bitboard::Bitboard; 
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															+ 
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															+type Square = u8; 
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															+type Side = bool; 
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															+const WHITE: Side = false; 
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															+const BLACK: Side = true; 
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															+ 
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															+pub enum Move { 
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															+    Default     { from: Square, to: Square }, 
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															+    Castling    { side: Side, left: bool }, 
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															+    EnPassant   { side: Side, column: u8} 
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															+} 
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															+ 
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															+ 
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															+pub struct BitboardIterator { pub board: Bitboard } 
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															+ 
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															+impl Iterator for BitboardIterator { 
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															+    type Item = Bitboard; 
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															+    fn next(&mut self) -> Option<Bitboard> { 
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															+        if self.board != 0 { 
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															+            let lsb = self.board & (0_u64.wrapping_sub(self.board)); 
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															+            self.board &= !lsb; 
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															+            //Some(lsb.trailing_zeros()) 
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															+            Some(lsb) 
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															+        } 
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															+            else { 
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															+                None 
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															+            } 
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															+    } 
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															+} 
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															+ 
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															+fn generate_pawn_moves() 
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															+{ 
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															+} 
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															+ 
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