Mark all compile-time constants as constexpr.

[stockfish] / src / material.cpp

diff --git a/src/material.cpp b/src/material.cpp
index 4cfda03e4f3dcab3ee3bfed56553ea379e775826..921e3007d0733788de389a676da524919ab06016 100644 (file)
--- a/src/material.cpp
+++ b/src/material.cpp
@@ -31,7 +31,7 @@ namespace {
 
   // Polynomial material imbalance parameters
 
-  const int QuadraticOurs[][PIECE_TYPE_NB] = {
+  constexpr int QuadraticOurs[][PIECE_TYPE_NB] = {
     //            OUR PIECES
     // pair pawn knight bishop rook queen
     {1667                               }, // Bishop pair
@@ -42,7 +42,7 @@ namespace {
     {-189,   24, 117,   133,  -134, -10 }  // Queen
   };
 
-  const int QuadraticTheirs[][PIECE_TYPE_NB] = {
+  constexpr int QuadraticTheirs[][PIECE_TYPE_NB] = {
     //           THEIR PIECES
     // pair pawn knight bishop rook queen
     {   0                               }, // Bishop pair
@@ -87,7 +87,7 @@ namespace {
   template<Color Us>
   int imbalance(const int pieceCount[][PIECE_TYPE_NB]) {
 
-    const Color Them = (Us == WHITE ? BLACK : WHITE);
+    constexpr Color Them = (Us == WHITE ? BLACK : WHITE);
 
     int bonus = 0;
 
@@ -215,13 +215,13 @@ Entry* probe(const Position& pos) {
   // Evaluate the material imbalance. We use PIECE_TYPE_NONE as a place holder
   // for the bishop pair "extended piece", which allows us to be more flexible
   // in defining bishop pair bonuses.
-  const int PieceCount[COLOR_NB][PIECE_TYPE_NB] = {
+  const int pieceCount[COLOR_NB][PIECE_TYPE_NB] = {
   { pos.count<BISHOP>(WHITE) > 1, pos.count<PAWN>(WHITE), pos.count<KNIGHT>(WHITE),
     pos.count<BISHOP>(WHITE)    , pos.count<ROOK>(WHITE), pos.count<QUEEN >(WHITE) },
   { pos.count<BISHOP>(BLACK) > 1, pos.count<PAWN>(BLACK), pos.count<KNIGHT>(BLACK),
     pos.count<BISHOP>(BLACK)    , pos.count<ROOK>(BLACK), pos.count<QUEEN >(BLACK) } };
 
-  e->value = int16_t((imbalance<WHITE>(PieceCount) - imbalance<BLACK>(PieceCount)) / 16);
+  e->value = int16_t((imbalance<WHITE>(pieceCount) - imbalance<BLACK>(pieceCount)) / 16);
   return e;
 }