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Forward a preference to the underlying executor.
template<
typename Property>
constraint< can_prefer< const Executor &, Property >::value &&!is_convertible< Property, execution::blocking_t::always_t >::value, strand< typename decay< typename prefer_result< const Executor &, Property >::type >::type > >::type prefer(
const Property & p) const;
Do not call this function directly. It is intended for use with the prefer customisation
point.
For example:
boost::asio::strand<my_executor_type> ex1 = ...;
auto ex2 = boost::asio::prefer(ex1,
boost::asio::execution::blocking.never);