1 files changed, 40 insertions, 0 deletions
diff --git a/vendor/tracing-tree/examples/stderr.rs b/vendor/tracing-tree/examples/stderr.rs
new file mode 100644
index 000000000..75880a376
--- /dev/null
+++ b/vendor/tracing-tree/examples/stderr.rs
@@ -0,0 +1,40 @@
+use tracing::{debug, info, instrument};
+use tracing_subscriber::{layer::SubscriberExt, registry::Registry};
+use tracing_tree::HierarchicalLayer;
+
+#[instrument]
+fn nth_fibonacci(n: u64) -> u64 {
+    if n == 0 || n == 1 {
+        debug!("Base case");
+        1
+    } else {
+        debug!("Recursing");
+        nth_fibonacci(n - 1) + nth_fibonacci(n - 2)
+    }
+}
+
+#[instrument]
+fn fibonacci_seq(to: u64) -> Vec<u64> {
+    let mut sequence = vec![];
+
+    for n in 0..=to {
+        debug!("Pushing {n} fibonacci", n = n);
+        sequence.push(nth_fibonacci(n));
+    }
+
+    sequence
+}
+
+fn main() {
+    let layer = HierarchicalLayer::default()
+        .with_indent_lines(true)
+        .with_indent_amount(2)
+        .with_bracketed_fields(true);
+
+    let subscriber = Registry::default().with(layer);
+    tracing::subscriber::set_global_default(subscriber).unwrap();
+
+    let n = 5;
+    let sequence = fibonacci_seq(n);
+    info!("The first {} fibonacci numbers are {:?}", n, sequence);
+}