static const char PieceChars[] = " pnbrqk";
-int piece_type_to_char(PieceType pt, bool upcase) {
- return upcase? toupper(PieceChars[pt]) : PieceChars[pt];
+char piece_type_to_char(PieceType pt, bool upcase) {
+ return char(upcase? toupper(PieceChars[pt]) : PieceChars[pt]);
}
PieceType piece_type_from_char(char c) {