HCha/Stockfish
1
0
Fork 0
mirror of https://github.com/HChaZZY/Stockfish.git synced 2025-12-21 01:27:16 +08:00
Code Issues Packages Projects Releases Wiki Activity

Use a Direction enum for Square deltas

Browse Source 
Currently the NORTH/WEST/SOUTH/EAST values are of type Square, but conceptually they are not squares but directions. This patch separates these values into a Direction enum and overloads addition and subtraction to allow adding a Square to a Direction (to get a new Square).

I have also slightly trimmed the possible overloadings to improve type safety. For example, it would normally not make sense to add a Color to a Color or a Piece to a Piece, or to multiply or divide them by an integer. It would also normally not make sense to add a Square to a Square.

This is a non-functional change.
This commit is contained in:
syzygy1
2017-12-04 17:52:31 +01:00
committed by Marco Costalba
parent 2acda1fde3
commit 822695d4d3
10 changed files with 81 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
src/movegen.cpp
View File

@@ -42,8 +42,8 @@ namespace {
assert(!pos.checkers());
const Square K = Chess960 ? kto > kfrom ? WEST : EAST
: KingSide ? WEST : EAST;
const Direction K = Chess960 ? kto > kfrom ? WEST : EAST
: KingSide ? WEST : EAST;
for (Square s = kto; s != kfrom; s += K)
if (pos.attackers_to(s) & enemies)
@@ -65,7 +65,7 @@ namespace {
}
template<GenType Type, Square D>
template<GenType Type, Direction D>
ExtMove* make_promotions(ExtMove* moveList, Square to, Square ksq) {
if (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
@@ -94,13 +94,13 @@ namespace {
// Compute our parametrized parameters at compile time, named according to
// the point of view of white side.
const Color Them = (Us == WHITE ? BLACK : WHITE);
const Bitboard TRank8BB = (Us == WHITE ? Rank8BB : Rank1BB);
const Bitboard TRank7BB = (Us == WHITE ? Rank7BB : Rank2BB);
const Bitboard TRank3BB = (Us == WHITE ? Rank3BB : Rank6BB);
const Square Up = (Us == WHITE ? NORTH : SOUTH);
const Square Right = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
const Square Left = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
const Color Them = (Us == WHITE ? BLACK : WHITE);
const Bitboard TRank8BB = (Us == WHITE ? Rank8BB : Rank1BB);
const Bitboard TRank7BB = (Us == WHITE ? Rank7BB : Rank2BB);
const Bitboard TRank3BB = (Us == WHITE ? Rank3BB : Rank6BB);
const Direction Up = (Us == WHITE ? NORTH : SOUTH);
const Direction Right = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
const Direction Left = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
Bitboard emptySquares;