#include <boost/type_traits/remove_cv.hpp>#include <boost/type_traits/remove_reference.hpp>#include <boost/log/detail/config.hpp>#include <boost/log/exceptions.hpp>#include <boost/log/utility/type_info_wrapper.hpp>#include <boost/log/attributes/fallback_policy_fwd.hpp>#include <boost/log/detail/header.hpp>#include <boost/log/detail/footer.hpp>

Classes | |
| struct | boost::fallback_to_none |
The fallback_to_none policy results in returning an empty value reference if the attribute value cannot be extracted. More... | |
| struct | boost::fallback_to_throw |
The fallback_to_throw policy results in throwing an exception if the attribute value cannot be extracted. More... | |
| struct | boost::fallback_to_default< DefaultT > |
The fallback_to_default policy results in a default value if the attribute value cannot be extracted. More... | |
Namespaces | |
| boost | |
| Duration formatting facet for input. | |
The header contains definition of fallback policies when attribute value visitation or extraction fails.