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apply if constexpr to additional instances

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as a form of documentation, and a hint to the compiler.

closes https://github.com/official-stockfish/Stockfish/pull/4345

No functional change
This commit is contained in:
Jonathan
2023-01-17 21:30:50 -07:00
committed by Joost VandeVondele
parent 734315ff30
commit a2038c1a01
4 changed files with 15 additions and 14 deletions
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16
src/movegen.cpp
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@@ -26,12 +26,12 @@ namespace Stockfish {
namespace {
template<GenType Type, Direction D>
ExtMove* make_promotions(ExtMove* moveList, Square to) {
ExtMove* make_promotions(ExtMove* moveList, [[maybe_unused]] Square to) {
if (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
if constexpr (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
*moveList++ = make<PROMOTION>(to - D, to, QUEEN);
if (Type == QUIETS || Type == EVASIONS || Type == NON_EVASIONS)
if constexpr (Type == QUIETS || Type == EVASIONS || Type == NON_EVASIONS)
{
*moveList++ = make<PROMOTION>(to - D, to, ROOK);
*moveList++ = make<PROMOTION>(to - D, to, BISHOP);
@@ -60,18 +60,18 @@ namespace {
Bitboard pawnsNotOn7 = pos.pieces(Us, PAWN) & ~TRank7BB;
// Single and double pawn pushes, no promotions
if (Type != CAPTURES)
if constexpr (Type != CAPTURES)
{
Bitboard b1 = shift<Up>(pawnsNotOn7) & emptySquares;
Bitboard b2 = shift<Up>(b1 & TRank3BB) & emptySquares;
if (Type == EVASIONS) // Consider only blocking squares
if constexpr (Type == EVASIONS) // Consider only blocking squares
{
b1 &= target;
b2 &= target;
}
if (Type == QUIET_CHECKS)
if constexpr (Type == QUIET_CHECKS)
{
// To make a quiet check, you either make a direct check by pushing a pawn
// or push a blocker pawn that is not on the same file as the enemy king.
@@ -102,7 +102,7 @@ namespace {
Bitboard b2 = shift<UpLeft >(pawnsOn7) & enemies;
Bitboard b3 = shift<Up >(pawnsOn7) & emptySquares;
if (Type == EVASIONS)
if constexpr (Type == EVASIONS)
b3 &= target;
while (b1)
@@ -116,7 +116,7 @@ namespace {
}
// Standard and en passant captures
if (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
if constexpr (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
{
Bitboard b1 = shift<UpRight>(pawnsNotOn7) & enemies;
Bitboard b2 = shift<UpLeft >(pawnsNotOn7) & enemies;