Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is an older version of Boost and was released in 2018. The current version is 1.89.0.

Struct template is_reference_wrapper

Struct template is_reference_wrapper

boost::is_reference_wrapper — Determine if a type T is an instantiation of reference_wrapper.

Synopsis

// In header: <boost/core/ref.hpp>

template<typename T> 
struct is_reference_wrapper {

  // public data members
  static constexpr bool value;
};

Description

The value static constant will be true if the type T is a specialization of reference_wrapper.