From 49889a15b8813614a9ff3771a7bb7e231bba3de7 Mon Sep 17 00:00:00 2001
From: Dan Buch <dan@meatballhat.com>
Date: Fri, 10 Sep 2021 11:00:40 -0400
Subject: [PATCH] RBE's hello/print/print_display/testcase_list

---
 rustbyexample/hello/testcase_list.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 rustbyexample/hello/testcase_list.rs

diff --git a/rustbyexample/hello/testcase_list.rs b/rustbyexample/hello/testcase_list.rs
new file mode 100644
index 0000000..2f29761
--- /dev/null
+++ b/rustbyexample/hello/testcase_list.rs
@@ -0,0 +1,23 @@
+use std::fmt;
+
+struct List(Vec<i32>);
+
+impl fmt::Display for List {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let vec = &self.0;
+
+        write!(f, "[")?;
+
+        for (count, v ) in vec.iter().enumerate() {
+            if count != 0 { write!(f, ", ")?; }
+            write!(f, "{}", v)?;
+        }
+
+        write!(f, "]")
+    }
+}
+
+fn main() {
+    let v = List(vec![1, 2, 3]);
+    println!("{}", v);
+}