fixed get_completion_scheduler for inline_scheduler (#295)

* fixed get_completion_scheduler for inline_scheduler

* add missing import

Author: dietmarkuehl

include/beman/execution/detail/inline_scheduler.hpp

@@ -13,6 +13,7 @@ import std;
 #include <utility>
 #endif
 #ifdef BEMAN_HAS_MODULES
+import beman.execution.detail.get_scheduler;
 import beman.execution.detail.sender;
 import beman.execution.detail.receiver;
 import beman.execution.detail.set_value;
@@ -59,6 +60,8 @@ struct inline_scheduler {
             -> state<Rcvr> {
             return {::std::forward<Rcvr>(receiver)};
         }
+
+        inline_scheduler query(const ::beman::execution::get_scheduler_t&) const noexcept { return {}; }
     };
 
     static constexpr auto schedule() noexcept -> sender { return {}; }

tests/beman/execution/exec-inline-scheduler.test.cpp

@@ -148,6 +148,9 @@ auto test_sender_env_is_inline_attrs() {
     auto sndr  = test_std::schedule(test_std::inline_scheduler{});
     auto attrs = test_std::get_env(sndr);
     static_assert(std::same_as<decltype(attrs), test_detail::inline_attrs<test_std::set_value_t>>);
+
+    auto sched = test_std::get_completion_scheduler<test_std::set_value_t>(test_std::get_env(sndr), sndr);
+    static_assert(std::same_as<decltype(sched), test_std::inline_scheduler>);
 }
 
 auto test_inline_attrs_completion_scheduler() {