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Remove unused code (#2150)

Remove an unused operator in has_game_cycle (thanks @vondele)
and modify its comment to explain other code.

No functional change.
This commit is contained in:
svivanov72 2019-05-16 15:14:11 +03:00 committed by Marco Costalba
parent 272936eaba
commit 2985a6b5d7

View file

@ -1189,16 +1189,13 @@ bool Position::has_game_cycle(int ply) const {
if (!(between_bb(s1, s2) & pieces()))
{
// In the cuckoo table, both moves Rc1c5 and Rc5c1 are stored in the same
// location. We select the legal one by reversing the move variable if necessary.
if (empty(s1))
move = make_move(s2, s1);
if (ply > i)
return true;
// For nodes before or at the root, check that the move is a repetition one
// rather than a move to the current position
// rather than a move to the current position.
// In the cuckoo table, both moves Rc1c5 and Rc5c1 are stored in the same
// location, so we have to select which square to check.
if (color_of(piece_on(empty(s1) ? s2 : s1)) != side_to_move())
continue;