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

This is the documentation for a snapshot of the master branch, built from commit e6e276a03e.


Get the last error associated with the stream.

const boost::system::error_code & error() const;
Return Value

An error_code corresponding to the last error from the stream.


To print the error associated with a failure to establish a connection:

tcp::iostream s("", "http");
if (!s)
  std::cout << "Error: " << s.error().message() << std::endl;