The is_shallow_mutable_sequence class is a traits class that may be used to determine whether a type is a range whose copies refer to the same writable elements.

template<
    typename T>
struct is_shallow_mutable_sequence :
  public integral_constant< bool, automatically_determined >

By default, the trait is true for a std::reference_wrapper to a range, a range of std::reference_wrapper elements, and a borrowed range such as std::span, provided that the elements are writable. Owning containers such as std::vector are not shallow mutable sequences.

A program may specialise this traits type if the T template parameter in the specialisation is a user-defined type.

Requirements

Header: boost/asio/is_shallow_mutable_sequence.hpp

Convenience header: boost/asio.hpp