rust example of lifetime event handling

src/main/rust/lifetime.rs

@@ -0,0 +1,40 @@
+/**
+ * In terms of C++, rust lack of constuctor ... as alternative there is Default traits to
+ * initilize object with some default values
+ * bash-3.2$ rustc -A unused_variables lifetime.rs
+ *
+ * bash-3.2$ ./lifetime
+main started
+scope started
+B(0x7fff571df328)::drop
+scope ended
+main ended
+B(0x7fff571df3a0)::drop
+B(0x7fff571df3a8)::drop
+ */
+
+struct A;
+
+struct B;
+
+
+impl Drop for B {
+  fn drop(&mut self) {
+    println! ("B({:p})::drop", self);
+  }
+}
+
+fn main() {
+   println!("main started");
+   let x = A;
+   let a = B;
+   let b = B;
+   println!("x:{:p}, a:{:p}, b:{:p}", &x, &a, &b);
+   println!("scope started");
+   {
+	let c = B;
+	println!("c:{:p}", &c);
+   }
+   println!("scope ended");
+   println!("main ended");
+}