明确支持when_all/when_any功能

librf/librf.h

 /*
- *Copyright 2017 lanzhengpeng
+ *Copyright 2017~2020 lanzhengpeng
  *
  *Licensed under the Apache License, Version 2.0 (the "License");
  *you may not use this file except in compliance with the License.
 #include "src/promise.inl"
 #include "src/state.inl"
 #include "src/sleep.h"
-
-#if _HAS_CXX17 || RESUMEF_USE_BOOST_ANY
 #include "src/when.h"
-#endif
+

librf/src/when.cpp

 #include "_awaker.h"
 
-#if _HAS_CXX17 || RESUMEF_USE_BOOST_ANY
-
 #include "when.h"
 #include <assert.h>
 
 		}
 	}
 }
-
-#endif

librf/src/when.h

 #include "_awaker.h"
 #include "promise.h"
 #include "promise.inl"
+#include "awaitable.h"
 
 
 //纠结过when_any的返回值，是选用index + std::any，还是选用std::variant<>。最终选择了std::any。
 			//如果已经触发了awaker,则返回true
 			RF_API bool wait_(const when_awaker_ptr & awaker);
 
-			template<class callee_t, class dummy_t = std::enable_if<!std::is_same<std::remove_cv_t<callee_t>, event_awaker_ptr>::value>>
+            template<class callee_t, class dummy_t = std::enable_if<!std::is_same<std::remove_cv_t<callee_t>, when_awaker_ptr>::value>>
 			auto wait(callee_t && awaker, dummy_t * dummy_ = nullptr)
 			{
+                (void)dummy_;
 				return wait_(std::make_shared<when_awaker>(std::forward<callee_t>(awaker)));
 			}