Unsafe pointer example.

2 files changed, 21 insertions, 0 deletions

diff --git a/rust/graph/Cargo.toml b/rust/graph/Cargo.toml
index adabedc..eb0841b 100644
--- a/rust/graph/Cargo.toml
+++ b/rust/graph/Cargo.toml
@@ -9,3 +9,7 @@ itertools = "0.4.15"
 [[bin]]
 name = "graph"
 path = "graph.rs"
+
+[[bin]]
+name = "graph2"
+path = "graph2.rs"
diff --git a/rust/graph/graph2.rs b/rust/graph/graph2.rs
new file mode 100644
index 0000000..1e57f19
--- /dev/null
+++ b/rust/graph/graph2.rs
@@ -0,0 +1,17 @@
+#[derive(Debug)]
+struct Node<'a> {
+    label: i32,
+    next: Option<&'a Node<'a>>,
+}
+
+
+fn main () {
+    let mut n = Node { label: 1, next: None };
+    unsafe {
+        let raw = &mut n as *mut Node;
+        (*raw).next = Some(&n);
+    }
+    println!("{}", n.label);
+    println!("{}", n.next.unwrap().label);
+    println!("{}", n.next.unwrap().next.unwrap().label);
+}