23 General utilities library [utilities]

23.14 Function objects [function.objects]

23.14.5 Class template reference_­wrapper [refwrap]

23.14.5.5 reference_­wrapper helper functions [refwrap.helpers]

template <class T> reference_wrapper<T> ref(T& t) noexcept;

1
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Returns: reference_­wrapper<T>(t).

template <class T> reference_wrapper<T> ref(reference_wrapper<T> t) noexcept;

2
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Returns: ref(t.get()).

template <class T> reference_wrapper<const T> cref(const T& t) noexcept;

3
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Returns: reference_­wrapper <const T>(t).

template <class T> reference_wrapper<const T> cref(reference_wrapper<T> t) noexcept;

4
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Returns: cref(t.get()).