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#pragma once
#include <functional>
#include <utility>
class ScopeGuard {
public:
ScopeGuard(std::function<void()>&& cb) : cb_(std::move(cb)), active_(true) {}
~ScopeGuard() {
Invoke();
}
ScopeGuard() = delete;
ScopeGuard(ScopeGuard&) = delete;
ScopeGuard(const ScopeGuard&) = delete;
ScopeGuard(ScopeGuard&&) = delete;
ScopeGuard& operator=(ScopeGuard&) = delete;
ScopeGuard& operator=(const ScopeGuard&) = delete;
void Cancel() { active_ = false; }
void Invoke() {
if (active_) {
cb_();
active_ = false;
}
}
private:
const std::function<void()> cb_;
bool active_;
};
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