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Assorted trivial cleanups

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- Cleanups by Alain
- Group king attacks and king defenses
- Signature of futility_move_count()
- Use is_discovery_check_on_king()
- Simplify backward definition
- Use static asserts in move generator
- Factor a statement in move generator

No functional change
This commit is contained in:
Stéphane Nicolet
2019-10-19 02:20:38 +02:00
parent 7e89a71624
commit 90c0385724
9 changed files with 30 additions and 35 deletions
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9
src/movegen.cpp
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@@ -60,6 +60,7 @@ namespace {
constexpr Direction UpRight = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
constexpr Direction UpLeft = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
const Square ksq = pos.square<KING>(Them);
Bitboard emptySquares;
Bitboard pawnsOn7 = pos.pieces(Us, PAWN) & TRank7BB;
@@ -84,8 +85,6 @@ namespace {
if (Type == QUIET_CHECKS)
{
Square ksq = pos.square<KING>(Them);
b1 &= pos.attacks_from<PAWN>(ksq, Them);
b2 &= pos.attacks_from<PAWN>(ksq, Them);
@@ -130,8 +129,6 @@ namespace {
Bitboard b2 = shift<UpLeft >(pawnsOn7) & enemies;
Bitboard b3 = shift<Up >(pawnsOn7) & emptySquares;
Square ksq = pos.square<KING>(Them);
while (b1)
moveList = make_promotions<Type, UpRight>(moveList, pop_lsb(&b1), ksq);
@@ -187,7 +184,7 @@ namespace {
ExtMove* generate_moves(const Position& pos, ExtMove* moveList, Color us,
Bitboard target) {
assert(Pt != KING && Pt != PAWN);
static_assert(Pt != KING && Pt != PAWN, "Unsupported piece type in generate_moves()");
const Square* pl = pos.squares<Pt>(us);
@@ -261,7 +258,7 @@ namespace {
template<GenType Type>
ExtMove* generate(const Position& pos, ExtMove* moveList) {
assert(Type == CAPTURES || Type == QUIETS || Type == NON_EVASIONS);
static_assert(Type == CAPTURES || Type == QUIETS || Type == NON_EVASIONS, "Unsupported type in generate()");
assert(!pos.checkers());
Color us = pos.side_to_move();