add serde derive to bp trees

Author: Cydhra

src/trees/bp/mod.rs

@@ -138,6 +138,7 @@ use lookup_query::{process_block_bwd, process_block_fwd, LOOKUP_BLOCK_SIZE};
 /// [`BpBuilder`]: BpBuilder
 /// [`BitVec`]: BitVec
 #[derive(Clone, Debug)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub struct BpTree<const BLOCK_SIZE: usize = DEFAULT_BLOCK_SIZE> {
     vec: RsVec,
     min_max_tree: MinMaxTree,

src/trees/mmt.rs

@@ -19,6 +19,7 @@ use std::num::NonZeroUsize;
 ///
 /// [`BpTree`]: crate::trees::bp::BpTree
 #[derive(Debug, Clone, Default, Eq, PartialEq)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 struct ExcessNode {
     /// excess from l..=r in the node [l, r]
     total: i64,
@@ -34,6 +35,7 @@ struct ExcessNode {
 ///
 /// [`BpTree`]: crate::trees::bp::BpTree
 #[derive(Clone, Debug, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub(crate) struct MinMaxTree {
     nodes: Box<[ExcessNode]>,
 }