update

src/test1.cpp

@@ -1,8 +1,5 @@
-#include <cstdio>
 #include <coroutine>
-#include <ios>
 #include <iostream>
-#include <source_location>
 #include <stdexcept>
 #include <type_traits>
 
@@ -19,8 +16,9 @@ struct Promise{
     auto initial_suspend(){
         std::cout<<__FUNCTION__<<'\n';
         return std::suspend_always{};
+        // return std::suspend_never{};
     }
-    auto final_suspend()noexcept{
+    auto final_suspend()noexcept{//最后要不要把句柄执行权限归还，如果不归还，那么协程被销毁，继续检查.done()则Segmentation fault
         std::cout<<__FUNCTION__<<'\n';
         return std::suspend_always{};
     }
@@ -53,8 +51,9 @@ coroutine<int> test(){
 int main(){
     std::cout<<__FUNCTION__<<'\n';
     auto handle = test();
-    while (!handle.done()) {
     std::cout<<__FUNCTION__<<'\n';
+    while (!handle.done()) {
         handle.resume();
+        std::cout<<__FUNCTION__<<'\n';
     }
 }