Remove std::vector inheritance

lib/battle/CBattleInfoCallback.cpp

@@ -1456,13 +1456,13 @@ AttackableTiles CBattleInfoCallback::getPotentiallyAttackableHexes(
 	const auto multihexAnimation = attacker->getBonusesOfType(BonusType::MULTIHEX_ANIMATION);
 
 	for (const auto & bonus : *multihexUnit)
-		at.friendlyCreaturePositions.insert(processTargets(bonus->additionalInfo));
+		at.friendlyCreaturePositions.insert(processTargets(bonus->additionalInfo.data()));
 
 	for (const auto & bonus : *multihexEnemy)
-		at.hostileCreaturePositions.insert(processTargets(bonus->additionalInfo));
+		at.hostileCreaturePositions.insert(processTargets(bonus->additionalInfo.data()));
 
 	for (const auto & bonus : *multihexAnimation)
-		at.overrideAnimationPositions.insert(processTargets(bonus->additionalInfo));
+		at.overrideAnimationPositions.insert(processTargets(bonus->additionalInfo.data()));
 
 	if(attacker->hasBonusOfType(BonusType::THREE_HEADED_ATTACK))
 		at.hostileCreaturePositions.insert(processTargets({2,6}));

lib/bonuses/Bonus.cpp

@@ -36,38 +36,8 @@ CAddInfo::CAddInfo() = default;
 
 CAddInfo::CAddInfo(si32 value)
 {
-	if(value != CAddInfo::NONE)
-		push_back(value);
-}
-
-bool CAddInfo::operator==(si32 value) const
-{
-	switch(size())
-	{
-	case 0:
-		return value == CAddInfo::NONE;
-	case 1:
-		return operator[](0) == value;
-	default:
-		return false;
-	}
-}
-
-bool CAddInfo::operator!=(si32 value) const
-{
-	return !operator==(value);
-}
-
-si32 & CAddInfo::operator[](size_type pos)
-{
-	if(pos >= size())
-		resize(pos + 1, CAddInfo::NONE);
-	return vector::operator[](pos);
-}
-
-si32 CAddInfo::operator[](size_type pos) const
-{
-	return pos < size() ? vector::operator[](pos) : CAddInfo::NONE;
+	if (value != CAddInfo::NONE)
+		data_.push_back(value);
 }
 
 std::string CAddInfo::toString() const
@@ -79,12 +49,12 @@ JsonNode CAddInfo::toJsonNode() const
 {
 	if(size() < 2)
 	{
-		return JsonNode(operator[](0));
+		return JsonNode((*this)[0]);
 	}
 	else
 	{
 		JsonNode node;
-		for(si32 value : *this)
+		for(si32 value : data_)
 			node.Vector().emplace_back(value);
 		return node;
 	}

lib/bonuses/Bonus.h

@@ -29,22 +29,78 @@ using TConstBonusListPtr = std::shared_ptr<const BonusList>;
 using TPropagatorPtr = std::shared_ptr<const IPropagator>;
 using TUpdaterPtr = std::shared_ptr<const IUpdater>;
 
-class DLL_LINKAGE CAddInfo : public std::vector<si32>
+class DLL_LINKAGE CAddInfo final
 {
 public:
+	using container = std::vector<si32>;
+	using size_type = container::size_type;
 	enum { NONE = -1 };
 
 	CAddInfo();
 	CAddInfo(si32 value);
 
-	bool operator==(si32 value) const;
-	bool operator!=(si32 value) const;
+	// Inline definitions in the header to avoid missing symbols across TUs
+	bool operator==(const CAddInfo& other) const noexcept {
+		return data_ == other.data_;
+	}
+
+	bool operator!=(const CAddInfo& other) const noexcept {
+		return !(*this == other);
+	}
+
+	bool operator==(si32 value) const
+	{
+		switch(data_.size())
+		{
+		case 0:
+			return value == CAddInfo::NONE;
+		case 1:
+			return data_[0] == value;
+		default:
+			return false;
+		}
+	}
+
+	bool operator!=(si32 value) const
+	{
+		return !(*this == value);
+	}
+
 
-	si32 & operator[](size_type pos);
-	si32 operator[](size_type pos) const;
+	si32 & operator[](size_type pos)
+	{
+		if(pos >= data_.size())
+			data_.resize(pos + 1, CAddInfo::NONE);
+		return data_[pos];
+	}
+
+	si32 operator[](size_type pos) const
+	{
+		return pos < data_.size() ? data_[pos] : CAddInfo::NONE;
+	}
 
 	std::string toString() const;
 	JsonNode toJsonNode() const;
+
+	// Minimal vector-like facade
+	size_type size() const noexcept { return data_.size(); }
+	bool empty() const noexcept { return data_.empty(); }
+	void push_back(si32 v) { data_.push_back(v); }
+	void resize(size_type n, si32 fill = CAddInfo::NONE) { data_.resize(n, fill); }
+
+	container::iterator begin() noexcept { return data_.begin(); }
+	container::iterator end() noexcept { return data_.end(); }
+	container::const_iterator begin() const noexcept { return data_.begin(); }
+	container::const_iterator end() const noexcept { return data_.end(); }
+
+	// expose const view for free operators
+	const container& data() const noexcept { return data_; }
+
+	template <class H>
+	void serialize(H& h) { h & data_; }
+
+private:
+	container data_;
 };
 
 /// Struct for handling bonuses of several types. Can be transferred to any hero