#### use_awaitable_t::executor_with_default::executor_with_default

Construct the adapted executor from the inner executor type.

    template<
        typename InnerExecutor1>
    executor_with_default(
        const InnerExecutor1 & ex,
        typename constraint< conditional< !is_same< InnerExecutor1, executor_with_default >::value, is_convertible< InnerExecutor1, InnerExecutor >, false_type >::type::value >::type  = 0);