diff --git a/librf/src/awaitable.h b/librf/src/awaitable.h
index f803274..e02e30a 100644
--- a/librf/src/awaitable.h
+++ b/librf/src/awaitable.h
@@ -17,11 +17,11 @@ namespace resumef
 		using lock_type = typename state_type::lock_type;
 		using _Alloc_char = typename state_type::_Alloc_char;
 
-		awaitable_impl_t() {}
-		awaitable_impl_t(const awaitable_impl_t&) = default;
-		awaitable_impl_t(awaitable_impl_t&&) = default;
+		awaitable_impl_t() noexcept = default;
+		awaitable_impl_t(const awaitable_impl_t&) noexcept = default;
+		awaitable_impl_t(awaitable_impl_t&&) noexcept = default;
 
-		awaitable_impl_t& operator = (const awaitable_impl_t&) = default;
+		awaitable_impl_t& operator = (const awaitable_impl_t&) noexcept = default;
 		awaitable_impl_t& operator = (awaitable_impl_t&&) = default;
 
 		/**
@@ -46,7 +46,7 @@ namespace resumef
 		/**
 		 * @brief 获得与之关联的future_t<>对象，作为可等待函数(awaitable function)的返回值。
 		 */
-		future_type get_future() noexcept
+		future_type get_future() const noexcept
 		{
 			return future_type{ this->_state };
 		}
diff --git a/librf/src/future.h b/librf/src/future.h
index 5af0b2b..4b9f48c 100644
--- a/librf/src/future.h
+++ b/librf/src/future.h
@@ -23,13 +23,13 @@ namespace resumef
 
 		future_t(counted_ptr<state_type> _st) noexcept
 			:_state(std::move(_st)) {}
-		future_t(const future_t&) = default;
-		future_t(future_t&&) = default;
+		future_t(const future_t&) noexcept = default;
+		future_t(future_t&&) noexcept = default;
 
-		future_t& operator = (const future_t&) = default;
+		future_t& operator = (const future_t&) noexcept = default;
 		future_t& operator = (future_t&&) = default;
 
-		bool await_ready() noexcept
+		bool await_ready() const noexcept
 		{
 			return _state->future_await_ready();
 		}
@@ -40,7 +40,7 @@ namespace resumef
 			_state->future_await_suspend(handler);
 		}
 
-		value_type await_resume()
+		value_type await_resume() const
 		{
 			return _state->future_await_resume();
 		}
diff --git a/librf/src/promise.h b/librf/src/promise.h
index 0f88c37..5914631 100644
--- a/librf/src/promise.h
+++ b/librf/src/promise.h
@@ -17,7 +17,7 @@ namespace resumef
 		using promise_type = promise_t<value_type>;
 		using future_type = future_t<value_type>;
 
-		promise_impl_t() noexcept {}
+		promise_impl_t() noexcept = default;
 		promise_impl_t(promise_impl_t&& _Right) noexcept = default;
 		promise_impl_t& operator = (promise_impl_t&& _Right) noexcept = default;
 		promise_impl_t(const promise_impl_t&) = delete;
diff --git a/librf/src/rf_task.cpp b/librf/src/rf_task.cpp
index 210f7bc..c073030 100644
--- a/librf/src/rf_task.cpp
+++ b/librf/src/rf_task.cpp
@@ -2,7 +2,7 @@
 
 namespace resumef
 {
-	task_t::task_t()
+	task_t::task_t() noexcept
 		: _stop(nostopstate)
 	{
 	}
diff --git a/librf/src/rf_task.h b/librf/src/rf_task.h
index 92e35ea..08a41f4 100644
--- a/librf/src/rf_task.h
+++ b/librf/src/rf_task.h
@@ -16,7 +16,7 @@ namespace resumef
 	 */
 	struct task_t
 	{
-		task_t();
+		task_t() noexcept;
 		virtual ~task_t();
 
 		/**
@@ -47,7 +47,7 @@ namespace resumef
 		 * @brief 要求停止协程。
 		 * @return bool 返回操作成功与否。
 		 */
-		bool request_stop_if_possible()
+		bool request_stop_if_possible() const
 		{
 			if (_stop.stop_possible())
 				return _stop.request_stop();
@@ -73,7 +73,7 @@ namespace resumef
 		using value_type = typename future_type::value_type;
 		using state_type = state_t<value_type>;
 
-		task_impl_t() = default;
+		task_impl_t() noexcept = default;
 		task_impl_t(future_type& f)
 		{
 			initialize(f);
@@ -92,7 +92,7 @@ namespace resumef
 		using future_type = generator_t<value_type>;
 		using state_type = state_generator_t;
 
-		task_impl_t() = default;
+		task_impl_t() noexcept = default;
 		task_impl_t(future_type& f)
 		{
 			initialize(f);
diff --git a/librf/src/scheduler.cpp b/librf/src/scheduler.cpp
index 5a1a521..f44b654 100644
--- a/librf/src/scheduler.cpp
+++ b/librf/src/scheduler.cpp
@@ -58,7 +58,7 @@ namespace resumef
 		}
 	}
 
-	local_scheduler_t::local_scheduler_t(scheduler_t& sch)
+	local_scheduler_t::local_scheduler_t(scheduler_t& sch) noexcept
 	{
 		if (th_scheduler_ptr == nullptr)
 		{
diff --git a/librf/src/scheduler.h b/librf/src/scheduler.h
index e746aad..d03cd0c 100644
--- a/librf/src/scheduler.h
+++ b/librf/src/scheduler.h
@@ -132,7 +132,7 @@ namespace resumef
 		/**
 		 * @brief 将指定的调度器绑定到当前线程上。
 		 */
-		local_scheduler_t(scheduler_t & sch);
+		local_scheduler_t(scheduler_t & sch) noexcept;
 
 		/**
 		 * @brief 如果当前线程绑定的调度器由local_scheduler_t所创建，则会销毁调度器，并解绑线程。
diff --git a/librf/src/switch_scheduler.h b/librf/src/switch_scheduler.h
index 9ffda75..a413e00 100644
--- a/librf/src/switch_scheduler.h
+++ b/librf/src/switch_scheduler.h
@@ -20,7 +20,7 @@ namespace resumef
 		switch_scheduler_awaitor& operator = (const switch_scheduler_awaitor&) = default;
 		switch_scheduler_awaitor& operator = (switch_scheduler_awaitor&&) = default;
 
-		bool await_ready() noexcept
+		bool await_ready() const noexcept
 		{
 			return false;
 		}
@@ -41,7 +41,7 @@ namespace resumef
 			return false;
 		}
 
-		void await_resume() noexcept
+		void await_resume() const noexcept
 		{
 		}
 
diff --git a/vs_proj/librf.vcxproj b/vs_proj/librf.vcxproj
index 254a371..5e212b8 100644
--- a/vs_proj/librf.vcxproj
+++ b/vs_proj/librf.vcxproj
@@ -46,7 +46,7 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>ClangCL</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>NotSet</CharacterSet>
   </PropertyGroup>