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#include 
   
    #include 
    
     #include 
     
      using boost::coroutines::coroutine;void cooperative(coroutine
      
       ::push_type &sink){	//返回main	sink();	throw std::runtime_error("error");}int main(){	coroutine
       
        ::pull_type source{ cooperative };	try	{		//调用cooperative		source();		//捕获抛出的异常std::runtime_error	}	catch (const std::runtime_error &e)	{		std::cerr << e.what() << '\n';	}}