default_policy<T, EC, EP>
A type alias to a no-value policy selected based on traits matching of T
, EC
and EP
. It is defined as follows:
If
EC
andEP
isvoid
, choose terminate.If is_error_code_available<T> true for
EC
, choose error_code_throw_as_system_error<T, EC, EP> forbasic_outcome
or error_code_throw_as_system_error<T, EC, void> forbasic_result
.If is_exception_ptr_available<T> true for
EC
orEP
, choose exception_ptr_rethrow<T, EC, EP> forbasic_outcome
or exception_ptr_rethrow<T, EC, void> forbasic_result
.Else choose fail_to_compile_observers, which fails the build with a useful message.
Namespace: BOOST_OUTCOME_V2_NAMESPACE::policy
Header: <boost/outcome/std_result.hpp>