1+++ 2title = "`outcome<T, EC = varies, EP = varies, NoValuePolicy = policy::default_policy<T, EC, EP>>`" 3description = "A type alias to a `std_outcome<T, EC, EP, NoValuePolicy>` (standalone edition) or `boost_outcome<T, EC, EP, NoValuePolicy>` (Boost edition)." 4+++ 5 6A type alias to either {{% api "std_outcome<T, EC = std::error_code, EP = std::exception_ptr, NoValuePolicy = policy::default_policy<T, EC, EP>>" %}} (standalone edition) or {{% api "boost_outcome<T, EC = boost::system::error_code, EP = boost::exception_ptr, NoValuePolicy = policy::default_policy<T, EC, EP>>" %}} (Boost edition), and `policy::`{{% api "default_policy" %}}. This means that `outcome<T>` uses the appropriate default alias depending on which edition of Outcome is in use. 7 8*Namespace*: `BOOST_OUTCOME_V2_NAMESPACE` 9 10*Header*: `<boost/outcome/outcome.hpp>` 11