支持VS2019 16.9

librf/librf.h

 #include <optional>
 #include <thread>
 #include <cassert>
+
+#ifdef __cpp_impl_coroutine
+#include <coroutine>
+#ifdef _MSC_VER
+extern "C" size_t _coro_frame_size();
+extern "C" void* _coro_frame_ptr();
+extern "C" void _coro_init_block();
+extern "C" void* _coro_resume_addr();
+extern "C" void _coro_init_frame(void*);
+extern "C" void _coro_save(size_t);
+extern "C" void _coro_suspend(size_t);
+extern "C" void _coro_cancel();
+extern "C" void _coro_resume_block();
+
+#pragma intrinsic(_coro_frame_size)
+#pragma intrinsic(_coro_frame_ptr)
+#pragma intrinsic(_coro_init_block)
+#pragma intrinsic(_coro_resume_addr)
+#pragma intrinsic(_coro_init_frame)
+#pragma intrinsic(_coro_save)
+#pragma intrinsic(_coro_suspend)
+#pragma intrinsic(_coro_cancel)
+#pragma intrinsic(_coro_resume_block)
+#endif
+#else
 #include <experimental/coroutine>
+#endif
 
 #include "src/stop_token.hpp"
 

librf/src/def.h

 
 #define LIB_RESUMEF_VERSION 30000 // 3.0.0
 
+#ifndef __cpp_impl_coroutine
 namespace std
 {
 	using experimental::coroutine_traits;
     using experimental::suspend_always;
     using experimental::suspend_never;
 }
+#endif
 
 namespace resumef
 {

librf/src/future.h

 		}
 
 		template<class _PromiseT/*, typename = std::enable_if_t<traits::is_promise_v<_PromiseT>>*/>
-		void await_suspend(coroutine_handle<_PromiseT> handler)
+		void await_suspend(coroutine_handle<_PromiseT> handler) const
 		{
 			_state->future_await_suspend(handler);
 		}

librf/src/generator.h

 				//ref_state()->set_exception(std::move(e));
 				std::terminate();
 			}
-#if defined(__clang__) || defined(__GNUC__)
+#if defined(__cpp_impl_coroutine) || defined(__clang__) || defined(__GNUC__)
 			void unhandled_exception()
 			{
 				//this->ref_state()->set_exception(std::current_exception());

vs_proj/librf.vcxproj

       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>_WIN32_WINNT=0x0601;_CONSOLE;ASIO_STANDALONE;_SILENCE_CXX17_ALLOCATOR_VOID_DEPRECATION_WARNING=1;ASIO_DISABLE_CONCEPTS=1;RESUMEF_ENABLE_MULT_SCHEDULER=1;RESUMEF_DEBUG_COUNTER=0;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\librf;..\..\asio\asio\include;..\..\asio-1.10.6\include;..\modern_cb;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <AdditionalOptions>/await</AdditionalOptions>
+      <AdditionalOptions>
+      </AdditionalOptions>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <CLanguageStandard>c11</CLanguageStandard>