[BitBoard] improvements

BitBoard.h

@@ -3,7 +3,6 @@
 
 #include <cstdint>
 #include <ostream>
-#include "CastlingRights.hpp"
 
 class BitBoard final {
 public:
@@ -11,54 +10,140 @@ public:
 
     BitBoard(uint64_t v = 0);
 
-//    explicit operator uint64_t() const;
-    explicit operator bool() const;
-    explicit operator unsigned long long() const;
-    operator void*() const;
+    explicit constexpr operator bool() const {
+        return mBoard != 0;
+    }
 
-    bool operator==(const BitBoard &rhs) const;
-    bool operator!=(const BitBoard &rhs) const;
-    bool operator<(const BitBoard &rhs) const;
-    bool operator>(const BitBoard &rhs) const;
-    bool operator<=(const BitBoard &rhs) const;
-    bool operator>=(const BitBoard &rhs) const;
+    explicit constexpr operator unsigned long long() const {
+        return mBoard;
+    }
 
-    // bitset operations
-    BitBoard &operator&=(const BitBoard &rhs);
-    BitBoard &operator|=(const BitBoard &rhs);
-    BitBoard &operator^=(const BitBoard &rhs);
-    BitBoard &operator<<=(const BitBoard &rhs);
-    BitBoard &operator>>=(const BitBoard &rhs);
-    BitBoard operator~();
+    operator void *() const {
+        return (void *) mBoard;
+    }
 
-    bool operator!() const;
-    bool operator&&(const BitBoard &rhs) const;
-    bool operator||(const BitBoard &rhs) const;
+    // Relational operators
+    constexpr bool operator==(const BitBoard &rhs) const {
+        return mBoard == rhs.mBoard;
+    }
+    constexpr bool operator!=(const BitBoard &rhs) const {
+        return !(rhs == *this);
+    }
+    constexpr bool operator<(const BitBoard &rhs) const {
+        return mBoard < rhs.mBoard;
+    }
+    constexpr bool operator>(const BitBoard &rhs) const {
+        return rhs < *this;
+    }
+    constexpr bool operator<=(const BitBoard &rhs) const {
+        return !(rhs < *this);
+    }
+    constexpr bool operator>=(const BitBoard &rhs) const {
+        return !(*this < rhs);
+    }
 
-    BitBoard &operator+=(const BitBoard &rhs);
-    BitBoard &operator-=(const BitBoard &rhs);
-    BitBoard &operator*=(const BitBoard &rhs);
-    BitBoard &operator/=(const BitBoard &rhs);
-    BitBoard &operator%=(const BitBoard &rhs);
+    // Logical operators
+    constexpr bool operator!() const {
+        return !mBoard;
+    }
+    constexpr bool operator&&(const BitBoard &rhs) const {
+        return mBoard && rhs.mBoard;
+    }
+    constexpr bool operator||(const BitBoard &rhs) const {
+        return mBoard || rhs.mBoard;
+    }
 
+    // Compound Bitwise assignment operators
+    constexpr BitBoard &operator&=(const BitBoard &rhs) {
+        mBoard &= rhs.mBoard;
+        return *this;
+    }
+    constexpr BitBoard &operator|=(const BitBoard &rhs) {
+        mBoard |= rhs.mBoard;
+        return *this;
+    }
+    constexpr BitBoard &operator^=(const BitBoard &rhs) {
+        mBoard ^= rhs.mBoard;
+        return *this;
+    }
+    constexpr BitBoard &operator<<=(const BitBoard &rhs) {
+        mBoard <<= rhs.mBoard;
+        return *this;
+    }
+    constexpr BitBoard &operator>>=(const BitBoard &rhs) {
+        mBoard >>= rhs.mBoard;
+        return *this;
+    }
+    BitBoard operator~() {
+        BitBoard result(*this);
+        result.mBoard = ~mBoard;
+        return result;
+    }
+
+    // Compound Arithmetic assignment operators
+    constexpr BitBoard &operator+=(const BitBoard &rhs) {
+        mBoard += rhs.mBoard;
+        return *this;
+    }
+    constexpr BitBoard &operator-=(const BitBoard &rhs) {
+        mBoard -= rhs.mBoard;
+        return *this;
+    }
+    constexpr BitBoard &operator%=(const BitBoard &rhs) {
+        mBoard %= rhs.mBoard;
+        return *this;
+    }
+
+    // Stream operator
     friend std::ostream &operator<<(std::ostream &os, const BitBoard &board);
-//    friend bool operator&&(const bool &lhs, const BitBoard &rhs);
 
 private:
     U64 mBoard = {};
 
 };
 
+// Bitwise operators
+inline BitBoard operator^(const BitBoard &lhs, const BitBoard &rhs) {
+    BitBoard result(lhs);
+    result ^= rhs;
+    return result;
+}
+inline BitBoard operator|(const BitBoard &lhs, const BitBoard &rhs) {
+    BitBoard result(lhs);
+    result |= rhs;
+    return result;
+}
+inline BitBoard operator&(const BitBoard &lhs, const BitBoard &rhs) {
+    BitBoard result(lhs);
+    result &= rhs;
+    return result;
+}
+inline BitBoard operator<<(const BitBoard &lhs, const BitBoard &rhs) {
+    BitBoard result(lhs);
+    result <<= rhs;
+    return result;
+}
+inline BitBoard operator>>(const BitBoard &lhs, const BitBoard &rhs) {
+    BitBoard result(lhs);
+    result >>= rhs;
+    return result;
+}
 
-BitBoard operator^(const BitBoard &lhs, const BitBoard &rhs);
-BitBoard operator|(const BitBoard &lhs, const BitBoard &rhs);
-BitBoard operator&(const BitBoard &lhs, const BitBoard &rhs);
-BitBoard operator<<(const BitBoard &lhs, const BitBoard &rhs);
-BitBoard operator>>(const BitBoard &lhs, const BitBoard &rhs);
-BitBoard operator+(const BitBoard &lhs, const BitBoard &rhs);
-BitBoard operator-(const BitBoard &lhs, const BitBoard &rhs);
-//BitBoard operator*(const BitBoard &lhs, const BitBoard &rhs);
-//BitBoard operator/(const BitBoard &lhs, const BitBoard &rhs);
-BitBoard operator%(const BitBoard &lhs, const BitBoard &rhs);
+// Arithmetic operators
+inline BitBoard operator+(const BitBoard &lhs, const BitBoard &rhs) {
+    BitBoard result(lhs);
+    result += rhs;
+    return result;
+}
+inline BitBoard operator-(const BitBoard &lhs, const BitBoard &rhs) {
+    BitBoard result(lhs);
+    result -= rhs;
+    return result;
+}
+inline BitBoard operator%(const BitBoard &lhs, const BitBoard &rhs) {
+    BitBoard result(lhs);
+    result %= rhs;
+    return result;
+}
 
 #endif //CHESS_ENGINE_BITBOARD_HPP