23 General utilities library [utilities]

23.14 Function objects [function.objects]

23.14.5 Class template reference_­wrapper [refwrap]

23.14.5.1 reference_­wrapper construct/copy/destroy [refwrap.const]

reference_wrapper(T& t) noexcept;

Effects: Constructs a reference_­wrapper object that stores a reference to t.

reference_wrapper(const reference_wrapper& x) noexcept;

Effects: Constructs a reference_­wrapper object that stores a reference to x.get().