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 version of Boost is under active development. You are currently in the master branch. The current version is 1.90.0.

error_code

The type of error code used by the library.

using error_code = boost::system::error_code;