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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);
}
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