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.
The type of buffer returned when dereferencing an iterator.
using value_type = implementation-defined;
If every buffer sequence in the view is a MutableBufferSequence,
then value_type will be
boost::asio::mutable_buffer. Otherwise, value_type will be boost::asio::const_buffer.