scopeguard.hpp

#pragma once
 
#include <assert.h>
#include <functional>
 
namespace dl::utils {
    class ScopeGuard final {
    private:
        std::function<void()> onScopeExit;
 
        ScopeGuard(const ScopeGuard&) = delete;
        ScopeGuard& operator=(const ScopeGuard&) = delete;
 
    public:
        explicit ScopeGuard(auto&& onScopeExit) try : onScopeExit(std::forward<decltype(onScopeExit)>(onScopeExit)) {
        } catch (...) {
            onScopeExit();
            throw;
        }
 
        explicit ScopeGuard(ScopeGuard&& other) : onScopeExit(std::move(other.onScopeExit)) {
            assert(other.onScopeExit == nullptr);
        }
 
        ~ScopeGuard() {
            if (onScopeExit != nullptr)
                onScopeExit();
        }
    };
} // namespace dl::utils