chenBright commented on code in PR #2643:
URL: https://github.com/apache/brpc/pull/2643#discussion_r1598446032
##########
src/butil/memory/scope_guard.h:
##########
@@ -83,6 +84,25 @@ ScopeGuard<Callback> MakeScopeGuard(Callback&& callback)
noexcept {
return ScopeGuard<Callback>{ std::forward<Callback>(callback)};
}
-}
+namespace internal {
+// for SCOPE_EXIT.
+enum class ScopeExitHelper {};
+
+template<typename Callback>
+ScopeGuard<Callback>
+operator+(ScopeExitHelper, Callback&& callback) {
+ return MakeScopeGuard(std::forward<Callback>(callback));
+} // namespace internal
+} // namespace butil
+
+#define BAIDU_ANONYMOUS_VARIABLE(prefix) BAIDU_CONCAT(ptrfix, __COUNTER__)
+
+// The code in the braces of SCOPE_EXIT always executes at the end of the
scope.
+// Variables used within SCOPE_EXIT are captured by reference.
+#define SCOPE_EXIT \
Review Comment:
现在的用法也是类似golang defer的。
```c++
BAIDU_SCOPE_EXIT {
...
};
```
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