From 0c6091d677c970f57bd18b3edc09b440014f8621 Mon Sep 17 00:00:00 2001
From: Jordan Gong <jordan.gong@protonmail.com>
Date: Sun, 20 Sep 2020 17:21:47 +0800
Subject: Drop dead instances
---
smart_pointer/src/main.rs | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/smart_pointer/src/main.rs b/smart_pointer/src/main.rs
index d7ed84c..d0be410 100644
--- a/smart_pointer/src/main.rs
+++ b/smart_pointer/src/main.rs
@@ -22,6 +22,16 @@ impl<T> Deref for MyBox<T> {
}
}
+struct CustomSmartPointer {
+ data: String,
+}
+
+impl Drop for CustomSmartPointer {
+ fn drop(&mut self) {
+ println!("Dropping CustomSmartPointer with data `{}`!", self.data);
+ }
+}
+
fn main() {
// Storing `i32` value on heap
let b = Box::new(5);
@@ -59,4 +69,14 @@ fn main() {
hello(&m);
// `m`: MyBox<String>, `*m`: String, `(*m)[..]`: str, `&(*m)[..]`: &str
hello(&(*m)[..]);
+
+ let c = CustomSmartPointer {
+ data: String::from("my stuff"),
+ };
+ let d = CustomSmartPointer {
+ data: String::from("other stuff"),
+ };
+ println!("CustomSmartPointer created.");
+ drop(c);
+ println!("CustomSmartPointer dropped before the end of main.");
}
--
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