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 the documentation for an old version of Boost. Click here to view this page for the latest version.
Prev Up HomeNext

bad_result_access_with<EC>

Exception type publicly inheriting from bad_result_access , and thus also std::logic_error , indicating an incorrect observation of value occurred. The error value at the time of the exception throw is moved or copied into this type, and is available using the .error() observer which comes in lvalue ref, const lvalue ref, rvalue ref, and const rvalue ref overloads.

The primary purpose of this exception type is to enable standing in for P0323 std::expected<T, E> ’s bad_expected_access<E> which is thrown on incorrect wide value observation. This is why it is only ever EC which is thrown with bad_result_access_with<EC> on value observation only, and only when there is an error available. See the throw_bad_result_access<EC> policy for more information.

Requires: Nothing.

Namespace: BOOST_OUTCOME_V2_NAMESPACE

Header: <boost/outcome/bad_access.hpp>

Last revised: January 25, 2019 at 01:51:37 UTC


Prev Up HomeNext