SivEvent.cpp

# include <Siv3D.hpp> // OpenSiv3D v0.6.4

template <class... Args>
class SivEvent
{
	Array<std::function<void(Args...)>> m_funcs;

public:
	SivEvent() = default;

	void AddListener(std::function<void(Args...)>&& func)
	{
		m_funcs.emplace_back(std::move(func));
	}

	void Invoke(Args&&... args)
	{
		for (const auto& func : m_funcs)
		{
			func(args...);
		}
	}
};

class MyClass
{
public:
	void PrintStr(StringView str)
	{
		Print << str;
	}
};

void Hoge(StringView str, int num)
{
	Print << str << U"と" << num;
}

void Main()
{
	{
		SivEvent<> myEvent;
		myEvent.AddListener([]() { Print << U"mak1a"; });
		myEvent.Invoke();
	}

	{
		SivEvent<int> myEvent;
		myEvent.AddListener([](int num) { Print << num; });
		myEvent.Invoke(100);
	}

	{
		SivEvent<MyClass> myEvent;
		myEvent.AddListener([](MyClass c) { c.PrintStr(U"MyClass"); });
		myEvent.Invoke(MyClass());
	}

	{
		SivEvent<String, int> myEvent;
		myEvent.AddListener([](StringView str, int num)
		{
			Print << str << U", " << num;
		});

		myEvent.AddListener(Hoge);

		myEvent.Invoke(U"hoge", 3);
	}

	while (System::Update())
	{

	}
}