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// TODO: Fix old-style casts |
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// TODO: Fix old-style casts |
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// TODO: make class and fix noexcept's |
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template<class T> |
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template<class T> |
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struct Wrapper |
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struct Wrapper |
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{ |
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{ |
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template<class TT, class G, std::enable_if_t<std::is_constructible<T, TT>::value, int> = 0> |
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template<class TT, class G, std::enable_if_t<std::is_constructible<T, TT>::value, int> = 0> |
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explicit Wrapper(TT&& value, G&& g) : Wrapper((T&&) value) |
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explicit Wrapper(TT&& value, G&& g) noexcept(noexcept(Wrapper{(T&&) value})) : Wrapper((T&&) value) |
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{ |
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{ |
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g.release(); |
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g.release(); |
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} |
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} |
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T& get() |
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T& get() noexcept |
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{ |
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{ |
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return m_value; |
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return m_value; |
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} |
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} |
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const T& get() const |
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const T& get() const noexcept |
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{ |
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{ |
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return m_value; |
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return m_value; |
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} |
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} |
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void reset(T&& newValue) |
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void reset(T&& newValue) noexcept(noexcept(m_value = move_assign_if_noexcept(newValue))) |
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{ |
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{ |
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m_value = move_assign_if_noexcept(newValue); |
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m_value = move_assign_if_noexcept(newValue); |
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} |
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} |
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void reset(const T& newValue) |
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void reset(const T& newValue) noexcept(noexcept(m_value = newValue)) |
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{ |
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{ |
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m_value = newValue; |
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m_value = newValue; |
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} |
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} |
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private: |
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private: |
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Wrapper(const T& value) : m_value(value) |
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Wrapper(const T& value) noexcept(noexcept(T{value})) : m_value(value) |
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{ |
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{ |
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} |
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} |
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Wrapper(T&& value) : m_value(std::move_if_noexcept(value)) |
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Wrapper(T&& value) noexcept(noexcept(T{std::move_if_noexcept(value)})) : m_value(std::move_if_noexcept(value)) |
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{ |
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{ |
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} |
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} |
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struct Wrapper<T&> |
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struct Wrapper<T&> |
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{ |
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{ |
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template<class TT, class G, std::enable_if_t<std::is_convertible<TT, T&>::value, int> = 0> |
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template<class TT, class G, std::enable_if_t<std::is_convertible<TT, T&>::value, int> = 0> |
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explicit Wrapper(TT&& value, G&& g) : m_value((T&) value) |
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explicit Wrapper(TT&& value, G&& g) noexcept(noexcept(static_cast<T&>((TT&&) value))) : m_value((T&) value) |
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{ |
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{ |
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g.release(); |
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g.release(); |
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} |
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} |
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T& get() |
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T& get() noexcept |
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{ |
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{ |
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return m_value.get(); |
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return m_value.get(); |
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} |
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} |
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const T& get() const |
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const T& get() const noexcept |
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{ |
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{ |
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return m_value.get(); |
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return m_value.get(); |
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} |
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} |
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private: |
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private: |
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std::reference_wrapper<T> m_value; |
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std::reference_wrapper<T> m_value; |
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}; |
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}; |