ScopeExit.h

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#pragma once
 
namespace nc::detail
{
template <class F>
class ScopeExit
{
public:
    explicit ScopeExit(const F& onExit) noexcept
        : m_func{onExit}
    {
    }
 
    explicit ScopeExit(F&& onExit) noexcept
        : m_func{std::move(onExit)}
    {
    }
 
    ~ScopeExit() noexcept
    {
        m_func();
    }
 
    ScopeExit(ScopeExit&&) = delete;
    ScopeExit(const ScopeExit&) = delete;
    void operator=(const ScopeExit&) = delete;
    void operator=(ScopeExit&&) = delete;
 
private:
    F m_func;
};
} // namespace nc::detail
 
#define UNIQUE_NAME_HELPER(name, lineNumber) name ## lineNumber
#define UNIQUE_NAME(name, lineNumber) UNIQUE_NAME_HELPER(name, lineNumber)
#define SCOPE_EXIT(body) auto UNIQUE_NAME(localScopeExitFunc, __LINE__) = nc::detail::ScopeExit([&](){body;});