boost exceptions

Question

Do all boost exceptions derive from std::exception? If not do they all derive from some base exception class?

Answer 1

According to the documentation boost::exception doesn't inherit std::exception.

The FAQ explains why.

However this page explains how to correctly use Boost exceptions.

Answer 2

A "good Boost citizen" library should throw using boost::throw_exception, in order to support configurations where exception handling is disabled.

The boost::throw_exception function requires that the type of the passed exception derives publicly from std::exception (as of version 1.37.0 or thereabouts boost::throw_exception will issue a compile error if that requirement is not met.) In addition and by default, exceptions emitted using boost::throw_exception derive from boost::exception.

However, there is no requirement for Boost libraries to throw exceptions through boost:throw_exception or to derive from std::exception.

Answer 3

I believe so. Can't think of a boost library throwing something non-std::exception based.