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Implement Debug for FenwickTree #170

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Implement Debug for FenwickTree #170

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15 changes: 15 additions & 0 deletions src/fenwicktree.rs
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
use std::fmt::{Debug, Error, Formatter};
use std::ops::{Bound, RangeBounds};

// Reference: https://en.wikipedia.org/wiki/Fenwick_tree
Expand Down Expand Up @@ -56,6 +57,20 @@ impl<T: Clone + std::ops::AddAssign<T>> FenwickTree<T> {
}
}

impl<T: Clone + Debug + std::ops::AddAssign<T>> Debug for FenwickTree<T> {
fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error> {
f.debug_struct("FenwickTree")
.field("n", &self.n)
.field(
"accum",
&(1..=self.n).map(|i| self.accum(i)).collect::<Vec<_>>(),
)
.field("e", &self.e)
.finish()?;
Ok(())
}
}

#[cfg(test)]
mod tests {
use super::*;
Expand Down