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Use operator~ to flip colors and squares

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More natural and nicer. Idea from Critter.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2012-01-12 19:31:18 +01:00
parent c549f71f64
commit d98150dffc
8 changed files with 76 additions and 76 deletions
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6
src/evaluate.cpp
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@@ -887,7 +887,7 @@ namespace {
for (c = WHITE; c <= BLACK; c++)
{
// Skip if other side has non-pawn pieces
if (pos.non_pawn_material(flip(c)))
if (pos.non_pawn_material(~c))
continue;
b = ei.pi->passed_pawns(c);
@@ -900,7 +900,7 @@ namespace {
// Compute plies to queening and check direct advancement
movesToGo = rank_distance(s, queeningSquare) - int(relative_rank(c, s) == RANK_2);
oppMovesToGo = square_distance(pos.king_square(flip(c)), queeningSquare) - int(c != pos.side_to_move());
oppMovesToGo = square_distance(pos.king_square(~c), queeningSquare) - int(c != pos.side_to_move());
pathDefended = ((ei.attackedBy[c][0] & queeningPath) == queeningPath);
if (movesToGo >= oppMovesToGo && !pathDefended)
@@ -928,7 +928,7 @@ namespace {
return SCORE_ZERO;
winnerSide = (pliesToQueen[WHITE] < pliesToQueen[BLACK] ? WHITE : BLACK);
loserSide = flip(winnerSide);
loserSide = ~winnerSide;
// Step 3. Can the losing side possibly create a new passed pawn and thus prevent the loss?
b = candidates = pos.pieces(PAWN, loserSide);