1 files changed, 28 insertions, 0 deletions
diff --git a/syn/examples/heapsize/example/src/main.rs b/syn/examples/heapsize/example/src/main.rs
new file mode 100644
index 0000000..9332b11
--- /dev/null
+++ b/syn/examples/heapsize/example/src/main.rs
@@ -0,0 +1,28 @@
+use heapsize::HeapSize;
+
+#[derive(HeapSize)]
+struct Demo<'a, T: ?Sized> {
+    a: Box<T>,
+    b: u8,
+    c: &'a str,
+    d: String,
+}
+
+fn main() {
+    let demo = Demo {
+        a: b"bytestring".to_vec().into_boxed_slice(),
+        b: 255,
+        c: "&'static str",
+        d: "String".to_owned(),
+    };
+
+    // 10 + 0 + 0 + 6 = 16
+    println!(
+        "heap size = {} + {} + {} + {} = {}",
+        demo.a.heap_size_of_children(),
+        demo.b.heap_size_of_children(),
+        demo.c.heap_size_of_children(),
+        demo.d.heap_size_of_children(),
+        demo.heap_size_of_children()
+    );
+}