20 General utilities library [utilities]

20.14 Function objects [function.objects]

20.14.4 Class template reference_wrapper [refwrap]

20.14.4.4 reference_wrapper invocation [refwrap.invoke]

template <class... ArgTypes> result_of_t<T&(ArgTypes&&... )> operator()(ArgTypes&&... args) const;

1

Returns: INVOKE(get(), std::forward<ArgTypes>(args)...). ([func.require])