60 lines
1.1 KiB
C++
60 lines
1.1 KiB
C++
#pragma once
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#include <functional>
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#include <vector>
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namespace discord {
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template <typename... Args>
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class Event final {
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public:
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using Token = int;
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Event() { slots_.reserve(4); }
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Event(Event const&) = default;
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Event(Event&&) = default;
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~Event() = default;
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Event& operator=(Event const&) = default;
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Event& operator=(Event&&) = default;
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template <typename EventHandler>
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Token Connect(EventHandler slot)
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{
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slots_.emplace_back(Slot{nextToken_, std::move(slot)});
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return nextToken_++;
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}
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void Disconnect(Token token)
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{
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for (auto& slot : slots_) {
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if (slot.token == token) {
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slot = slots_.back();
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slots_.pop_back();
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break;
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}
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}
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}
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void DisconnectAll() { slots_ = {}; }
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void operator()(Args... args)
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{
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for (auto const& slot : slots_) {
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slot.fn(std::forward<Args>(args)...);
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}
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}
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private:
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struct Slot {
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Token token;
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std::function<void(Args...)> fn;
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};
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Token nextToken_{};
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std::vector<Slot> slots_{};
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};
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} // namespace discord
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