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 2013. The current version is 1.90.0.

basic_io_object::implementation_type

basic_io_object::implementation_type

The underlying implementation type of I/O object.

typedef service_type::implementation_type implementation_type;