From c13fedbb1344f40765580922718ec9f95d20f079 Mon Sep 17 00:00:00 2001
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 <li20020410@126.com>
Date: Thu, 13 Jul 2023 06:04:55 +0000
Subject: [PATCH] =?UTF-8?q?=E7=A5=9E=E5=A5=87=E5=BC=95=E7=94=A8=E5=9C=A8?=
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Signed-off-by: 抵不住的时间 <li20020410@126.com>
---
 C++/RetLocalParamPlus.cpp | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 C++/RetLocalParamPlus.cpp

diff --git a/C++/RetLocalParamPlus.cpp b/C++/RetLocalParamPlus.cpp
new file mode 100644
index 0000000..5304efb
--- /dev/null
+++ b/C++/RetLocalParamPlus.cpp
@@ -0,0 +1,24 @@
+#include <iostream>
+using namespace std;
+
+/*
+ *  根据 decltype(i) 推断类型，返回类型为 int
+ */
+decltype(auto)
+fn_1(int i) {
+    return i;
+}
+
+/*
+ * 根据 decltype((i)) 推断类型，由于(i)是左值，返回类型为 int&
+ * 从而产生局部变量的引用
+ */
+decltype(auto)
+fn_2(int i) {
+    return (i);
+}
+
+int main() {
+    cout << fn_1(1) << endl ;       // OK
+    cout << fn_2(1) << endl ;       // Segmentation fault
+}
-- 
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