43 lines
976 B
C++
43 lines
976 B
C++
#pragma once
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#include <functional>
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class ObserverHandler {
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public:
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ObserverHandler() = default;
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ObserverHandler(std::function<void()> destructor)
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: destructor(std::move(destructor)) {
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}
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ObserverHandler(const ObserverHandler&) = delete;
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ObserverHandler(ObserverHandler&& handler) noexcept
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: destructor(std::move(handler.destructor)) {
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handler.destructor = nullptr;
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}
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~ObserverHandler() {
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if (destructor) {
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destructor();
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}
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}
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bool operator==(std::nullptr_t) const {
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return destructor == nullptr;
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}
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ObserverHandler& operator=(const ObserverHandler& handler) = delete;
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ObserverHandler& operator=(ObserverHandler&& handler) noexcept {
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if (destructor) {
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destructor();
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}
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destructor = std::move(handler.destructor);
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handler.destructor = nullptr;
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return *this;
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}
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private:
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std::function<void()> destructor;
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};
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