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dark-tree: moved from script/research/dark-forest into src/sdk
This commit is contained in:
3
script/research/dark-forest/.gitignore
vendored
3
script/research/dark-forest/.gitignore
vendored
@@ -1,3 +0,0 @@
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/target
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Cargo.lock
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rustfmt.toml
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@@ -1,13 +0,0 @@
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[package]
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name = "dark-forest"
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version = "0.1.0"
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description = "Minimal Tree implementation using DFS post-order traversal to iterate its leafs."
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authors = ["Dyne.org foundation <foundation@dyne.org>"]
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repository = "https://github.com/darkrenaissance/darkfi"
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license = "AGPL-3.0-only"
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edition = "2021"
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[workspace]
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[dependencies]
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thiserror = "1.0.50"
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@@ -1,45 +0,0 @@
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/* This file is part of DarkFi (https://dark.fi)
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*
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* Copyright (C) 2020-2023 Dyne.org foundation
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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||||
* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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||||
* GNU Affero General Public License for more details.
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||||
*
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* You should have received a copy of the GNU Affero General Public License
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||||
* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/// Main result type used by this library.
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pub type DarkTreeResult<T> = std::result::Result<T, DarkTreeError>;
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/// General library errors.
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#[derive(Debug, Clone, thiserror::Error)]
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pub enum DarkTreeError {
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#[error("Invalid DarkLeaf index found: {0} (Expected: {1}")]
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InvalidLeafIndex(usize, usize),
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#[error("Invalid DarkLeaf parent index found for leaf: {0}")]
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InvalidLeafParentIndex(usize),
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#[error("Invalid DarkLeaf children index found for leaf: {0}")]
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InvalidLeafChildrenIndexes(usize),
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#[error("Invalid DarkTree min capacity found: {0} (Expected: >= 1)")]
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InvalidMinCapacity(usize),
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#[error("DarkTree min capacity has not been exceeded")]
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MinCapacityNotExceeded,
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#[error("Invalid DarkTree max capacity found: {0} (Expected: >= {1})")]
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InvalidMaxCapacity(usize, usize),
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#[error("DarkTree max capacity has been exceeded")]
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MaxCapacityExceeded,
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}
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@@ -1,565 +0,0 @@
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/* This file is part of DarkFi (https://dark.fi)
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*
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* Copyright (C) 2020-2023 Dyne.org foundation
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*
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* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Affero General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
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*
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||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Affero General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Affero General Public License
|
||||
* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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use std::{collections::VecDeque, iter::FusedIterator, mem};
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/// Error handling
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mod error;
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use error::{DarkTreeError, DarkTreeResult};
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#[cfg(test)]
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mod tests;
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/// This struct represents the information hold by a
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/// [`DarkTreeLeaf`], namely its data, along with positional
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/// indexes information, based on tree's traversal order.
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/// These indexes are only here to enable referencing
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/// connected nodes, and are *not* used as pointers by the
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/// tree. Creator must ensure they are properly setup.
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#[derive(Clone, Debug, PartialEq)]
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struct DarkLeaf<T>
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where
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T: Clone,
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{
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/// Data holded by this leaf
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data: T,
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/// Index showcasing this leaf's parent tree, when all
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/// leafs are in order. None indicates that this leaf
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/// has no parent.
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parent_index: Option<usize>,
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/// Vector of indexes showcasing this leaf's children
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/// positions, when all leafs are in order. If vector
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/// is empty, it indicates that this leaf has no children.
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children_indexes: Vec<usize>,
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}
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/// This struct represents a Leaf of a [`DarkTree`],
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/// holding this tree node data, along with its positional
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/// index, based on tree's traversal order.
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#[derive(Clone, Debug, PartialEq)]
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struct DarkTreeLeaf<T>
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where
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T: Clone,
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{
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/// Index showcasing this leaf's position, when all
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/// leafs are in order.
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index: usize,
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/// Leaf's data, along with its parent and children
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/// indexes information.
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info: DarkLeaf<T>,
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}
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impl<T: std::clone::Clone> DarkTreeLeaf<T> {
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/// Every [`DarkTreeLeaf`] is initiated using default indexes.
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fn new(data: T) -> DarkTreeLeaf<T> {
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Self { index: 0, info: DarkLeaf { data, parent_index: None, children_indexes: vec![] } }
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}
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/// Set [`DarkTreeLeaf`]'s index
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fn set_index(&mut self, index: usize) {
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self.index = index;
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}
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/// Set [`DarkTreeLeaf`]'s parent index
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fn set_parent_index(&mut self, parent_index: Option<usize>) {
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self.info.parent_index = parent_index;
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}
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/// Set [`DarkTreeLeaf`]'s children index
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fn set_children_indexes(&mut self, children_indexes: Vec<usize>) {
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self.info.children_indexes = children_indexes;
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}
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}
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/// This struct represents a Tree using DFS post-order traversal,
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/// where when we iterate through the tree, we first process tree
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/// node's children, and then the node itself, recursively.
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/// Based on this, initial tree node (leaf), known as the root,
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/// will always show up at the end of iteration. It is advised
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/// to always execute .build() after finishing setting up the
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/// Tree, to properly index it and check its integrity.
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#[derive(Debug, PartialEq)]
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struct DarkTree<T: std::clone::Clone> {
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/// This tree's leaf information, along with its data
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leaf: DarkTreeLeaf<T>,
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/// Vector containing all tree's branches(children tree)
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children: Vec<DarkTree<T>>,
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/// Min capacity of the tree, including all children nodes
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/// recursively from the root. Since root is always present,
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/// min capacity must always be >= 1. This is enforced by
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/// the root, so children nodes don't have to set it up.
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/// If children nodes children(recursively) make us not exceed
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/// that min capacity, we will be able to catch it using
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/// .check_min_capacity() or .integrity_check().
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min_capacity: usize,
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/// Optional max capacity of the tree, including all children
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/// nodes recursively from the root. None indicates no
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/// capacity restrictions. This is enforced by the root,
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/// so children nodes don't have to set it up. If children
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/// nodes children(recursively) make us exceed that capacity,
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/// we will be able to catch it using .check_max_capacity() or
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/// .integrity_check().
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max_capacity: Option<usize>,
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}
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impl<T: std::clone::Clone> DarkTree<T> {
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/// Initialize a [`DarkTree`], using provided data to
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/// generate its root.
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fn new(
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data: T,
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children: Vec<DarkTree<T>>,
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min_capacity: Option<usize>,
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max_capacity: Option<usize>,
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) -> DarkTree<T> {
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// Setup min capacity
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let min_capacity = if let Some(min_capacity) = min_capacity {
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if min_capacity == 0 {
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1
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} else {
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min_capacity
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}
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} else {
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1
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};
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let leaf = DarkTreeLeaf::new(data);
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Self { leaf, children, min_capacity, max_capacity }
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}
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/// Build the [`DarkTree`] indexes and perform an
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/// integrity check on them. This should be used
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/// after we have appended all child nodes, so we
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/// don't have to call .index() and .integrity_check()
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/// manually.
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fn build(&mut self) -> DarkTreeResult<()> {
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self.index();
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self.integrity_check()
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}
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/// Build the [`DarkTree`] using .build() and
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/// then produce a flattened vector containing
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/// all the leafs in DFS post-order traversal order.
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fn build_vec(&mut self) -> DarkTreeResult<Vec<DarkLeaf<T>>> {
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self.build()?;
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Ok(self.iter().cloned().map(|x| x.info).collect())
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}
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/// Return the count of all [`DarkTree`] leafs.
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fn len(&self) -> usize {
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self.iter().count()
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}
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/// Check if configured min capacity have not been exceeded.
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fn check_min_capacity(&self) -> DarkTreeResult<()> {
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if self.len() < self.min_capacity {
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return Err(DarkTreeError::MinCapacityNotExceeded)
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}
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Ok(())
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}
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/// Check if configured max capacity have been exceeded.
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fn check_max_capacity(&self) -> DarkTreeResult<()> {
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if let Some(max_capacity) = self.max_capacity {
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if self.len() > max_capacity {
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return Err(DarkTreeError::MaxCapacityExceeded)
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}
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}
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Ok(())
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}
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/// Append a new child node to the [`DarkTree`],
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/// if max capacity has not been exceeded. This call
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/// doesn't update the indexes, so either .index()
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/// or .build() must be called after it.
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fn append(&mut self, child: DarkTree<T>) -> DarkTreeResult<()> {
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// Check current max capacity
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if let Some(max_capacity) = self.max_capacity {
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if self.len() + 1 > max_capacity {
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return Err(DarkTreeError::MaxCapacityExceeded)
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}
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}
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// Append the new child
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self.children.push(child);
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Ok(())
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}
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/// Set [`DarkTree`]'s leaf parent and children indexes,
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/// and trigger the setup of its children indexes.
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fn set_parent_children_indexes(&mut self, parent_index: Option<usize>) {
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// Set our leafs parent index
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self.leaf.set_parent_index(parent_index);
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// Now recursively, we setup nodes children indexes and keep
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// their index in our own children index list
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let mut children_indexes = vec![];
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for child in &mut self.children {
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child.set_parent_children_indexes(Some(self.leaf.index));
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children_indexes.push(child.leaf.index);
|
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}
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|
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// Set our leafs children indexes
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self.leaf.set_children_indexes(children_indexes);
|
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}
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/// Setup [`DarkTree`]'s leafs indexes, based on DFS post-order
|
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/// traversal order. This call assumes it was triggered for the
|
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/// root of the tree, which has no parent index.
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fn index(&mut self) {
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// First we setup each leafs index
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for (index, leaf) in self.iter_mut().enumerate() {
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leaf.set_index(index);
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}
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// Now we trigger recursion to setup each nodes rest indexes
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self.set_parent_children_indexes(None);
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}
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/// Verify [`DarkTree`]'s leaf parent and children indexes validity,
|
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/// and trigger the check of its children indexes.
|
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fn check_parent_children_indexes(&self, parent_index: Option<usize>) -> DarkTreeResult<()> {
|
||||
// Check our leafs parent index
|
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if self.leaf.info.parent_index != parent_index {
|
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return Err(DarkTreeError::InvalidLeafParentIndex(self.leaf.index))
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}
|
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|
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// Now recursively, we check nodes children indexes and keep
|
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// their index in our own children index list
|
||||
let mut children_indexes = vec![];
|
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for child in &self.children {
|
||||
child.check_parent_children_indexes(Some(self.leaf.index))?;
|
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children_indexes.push(child.leaf.index);
|
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}
|
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|
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// Check our leafs children indexes
|
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if self.leaf.info.children_indexes != children_indexes {
|
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return Err(DarkTreeError::InvalidLeafChildrenIndexes(self.leaf.index))
|
||||
}
|
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|
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Ok(())
|
||||
}
|
||||
|
||||
/// Verify current [`DarkTree`]'s leafs indexes validity,
|
||||
/// based on DFS post-order traversal order. Additionally,
|
||||
/// check that min and max capacities have been properly
|
||||
/// configured, min capacity has been exceeded and max
|
||||
/// capacity has not. This call assumes it was triggered
|
||||
/// for the root of the tree, which has no parent index.
|
||||
fn integrity_check(&self) -> DarkTreeResult<()> {
|
||||
// Check current min capacity is valid
|
||||
if self.min_capacity < 1 {
|
||||
return Err(DarkTreeError::InvalidMinCapacity(self.min_capacity))
|
||||
}
|
||||
|
||||
// Check currect max capacity is not less than
|
||||
// current min capacity
|
||||
if let Some(max_capacity) = self.max_capacity {
|
||||
if self.min_capacity > max_capacity {
|
||||
return Err(DarkTreeError::InvalidMaxCapacity(max_capacity, self.min_capacity))
|
||||
}
|
||||
}
|
||||
|
||||
// Check current min capacity
|
||||
self.check_min_capacity()?;
|
||||
|
||||
// Check current max capacity
|
||||
self.check_max_capacity()?;
|
||||
|
||||
// Check each leaf index
|
||||
for (index, leaf) in self.iter().enumerate() {
|
||||
if index != leaf.index {
|
||||
return Err(DarkTreeError::InvalidLeafIndex(leaf.index, index))
|
||||
}
|
||||
}
|
||||
|
||||
// Trigger recursion to check each nodes rest indexes
|
||||
self.check_parent_children_indexes(None)
|
||||
}
|
||||
|
||||
/// Immutably iterate through the tree, using DFS post-order
|
||||
/// traversal.
|
||||
fn iter(&self) -> DarkTreeIter<'_, T> {
|
||||
DarkTreeIter { children: std::slice::from_ref(self), parent: None }
|
||||
}
|
||||
|
||||
/// Mutably iterate through the tree, using DFS post-order
|
||||
/// traversal.
|
||||
fn iter_mut(&mut self) -> DarkTreeIterMut<'_, T> {
|
||||
DarkTreeIterMut { children: std::slice::from_mut(self), parent: None, parent_leaf: None }
|
||||
}
|
||||
}
|
||||
|
||||
/// Immutable iterator of a [`DarkTree`], performing DFS post-order
|
||||
/// traversal on the Tree leafs.
|
||||
struct DarkTreeIter<'a, T: std::clone::Clone> {
|
||||
children: &'a [DarkTree<T>],
|
||||
parent: Option<Box<DarkTreeIter<'a, T>>>,
|
||||
}
|
||||
|
||||
impl<T: std::clone::Clone> Default for DarkTreeIter<'_, T> {
|
||||
fn default() -> Self {
|
||||
DarkTreeIter { children: &[], parent: None }
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, T: std::clone::Clone> Iterator for DarkTreeIter<'a, T> {
|
||||
type Item = &'a DarkTreeLeaf<T>;
|
||||
|
||||
/// Grab next item iterator visits and return
|
||||
/// its immutable reference, or recursively
|
||||
/// create and continue iteration on current
|
||||
/// leaf's children.
|
||||
fn next(&mut self) -> Option<Self::Item> {
|
||||
match self.children.first() {
|
||||
None => match self.parent.take() {
|
||||
Some(parent) => {
|
||||
// Grab parent's leaf
|
||||
*self = *parent;
|
||||
// Its safe to unwrap here as we effectively returned
|
||||
// to this tree after "pushing" it after its children
|
||||
let leaf = &self.children.first().unwrap().leaf;
|
||||
self.children = &self.children[1..];
|
||||
Some(leaf)
|
||||
}
|
||||
None => None,
|
||||
},
|
||||
Some(leaf) => {
|
||||
// Iterate over tree's children/sub-trees
|
||||
*self = DarkTreeIter {
|
||||
children: leaf.children.as_slice(),
|
||||
parent: Some(Box::new(mem::take(self))),
|
||||
};
|
||||
self.next()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<T: std::clone::Clone> FusedIterator for DarkTreeIter<'_, T> {}
|
||||
|
||||
/// Define fusion iteration behavior, allowing
|
||||
/// us to use the [`DarkTreeIter`] iterator in
|
||||
/// loops directly, without using .iter() method
|
||||
/// of [`DarkTree`].
|
||||
impl<'a, T: std::clone::Clone> IntoIterator for &'a DarkTree<T> {
|
||||
type Item = &'a DarkTreeLeaf<T>;
|
||||
|
||||
type IntoIter = DarkTreeIter<'a, T>;
|
||||
|
||||
fn into_iter(self) -> Self::IntoIter {
|
||||
self.iter()
|
||||
}
|
||||
}
|
||||
|
||||
/// Mutable iterator of a [`DarkTree`], performing DFS post-order
|
||||
/// traversal on the Tree leafs.
|
||||
struct DarkTreeIterMut<'a, T: std::clone::Clone> {
|
||||
children: &'a mut [DarkTree<T>],
|
||||
parent: Option<Box<DarkTreeIterMut<'a, T>>>,
|
||||
parent_leaf: Option<&'a mut DarkTreeLeaf<T>>,
|
||||
}
|
||||
|
||||
impl<T: std::clone::Clone> Default for DarkTreeIterMut<'_, T> {
|
||||
fn default() -> Self {
|
||||
DarkTreeIterMut { children: &mut [], parent: None, parent_leaf: None }
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, T: std::clone::Clone> Iterator for DarkTreeIterMut<'a, T> {
|
||||
type Item = &'a mut DarkTreeLeaf<T>;
|
||||
|
||||
/// Grab next item iterator visits and return
|
||||
/// its mutable reference, or recursively
|
||||
/// create and continue iteration on current
|
||||
/// leaf's children.
|
||||
fn next(&mut self) -> Option<Self::Item> {
|
||||
let children = mem::take(&mut self.children);
|
||||
match children.split_first_mut() {
|
||||
None => match self.parent.take() {
|
||||
Some(parent) => {
|
||||
// Grab parent's leaf
|
||||
let parent_leaf = mem::take(&mut self.parent_leaf);
|
||||
*self = *parent;
|
||||
parent_leaf
|
||||
}
|
||||
None => None,
|
||||
},
|
||||
Some((first, rest)) => {
|
||||
// Setup simplings iteration
|
||||
self.children = rest;
|
||||
|
||||
// Iterate over tree's children/sub-trees
|
||||
*self = DarkTreeIterMut {
|
||||
children: first.children.as_mut_slice(),
|
||||
parent: Some(Box::new(mem::take(self))),
|
||||
parent_leaf: Some(&mut first.leaf),
|
||||
};
|
||||
self.next()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Define fusion iteration behavior, allowing
|
||||
/// us to use the [`DarkTreeIterMut`] iterator
|
||||
/// in loops directly, without using .iter_mut()
|
||||
/// method of [`DarkTree`].
|
||||
impl<'a, T: std::clone::Clone> IntoIterator for &'a mut DarkTree<T> {
|
||||
type Item = &'a mut DarkTreeLeaf<T>;
|
||||
|
||||
type IntoIter = DarkTreeIterMut<'a, T>;
|
||||
|
||||
fn into_iter(self) -> Self::IntoIter {
|
||||
self.iter_mut()
|
||||
}
|
||||
}
|
||||
|
||||
/// Special iterator of a [`DarkTree`], performing DFS post-order
|
||||
/// traversal on the Tree leafs, consuming each leaf. Since this
|
||||
/// iterator consumes the tree, it becomes unusable after it's moved.
|
||||
struct DarkTreeIntoIter<T: std::clone::Clone> {
|
||||
children: VecDeque<DarkTree<T>>,
|
||||
parent: Option<Box<DarkTreeIntoIter<T>>>,
|
||||
}
|
||||
|
||||
impl<T: std::clone::Clone> Default for DarkTreeIntoIter<T> {
|
||||
fn default() -> Self {
|
||||
DarkTreeIntoIter { children: Default::default(), parent: None }
|
||||
}
|
||||
}
|
||||
|
||||
impl<T: std::clone::Clone> Iterator for DarkTreeIntoIter<T> {
|
||||
type Item = DarkTreeLeaf<T>;
|
||||
|
||||
/// Move next item iterator visits from the tree
|
||||
/// to the iterator consumer, if it has no children.
|
||||
/// Otherwise recursively create and continue iteration
|
||||
/// on current leaf's children, and moving it after them.
|
||||
fn next(&mut self) -> Option<Self::Item> {
|
||||
match self.children.pop_front() {
|
||||
None => match self.parent.take() {
|
||||
Some(parent) => {
|
||||
// Continue iteration on parent's simplings
|
||||
*self = *parent;
|
||||
self.next()
|
||||
}
|
||||
None => None,
|
||||
},
|
||||
Some(mut leaf) => {
|
||||
// If leaf has no children, return it
|
||||
if leaf.children.is_empty() {
|
||||
return Some(leaf.leaf)
|
||||
}
|
||||
|
||||
// Push leaf after its children
|
||||
let mut children: VecDeque<DarkTree<T>> = leaf.children.into();
|
||||
leaf.children = Default::default();
|
||||
children.push_back(leaf);
|
||||
|
||||
// Iterate over tree's children/sub-trees
|
||||
*self = DarkTreeIntoIter { children, parent: Some(Box::new(mem::take(self))) };
|
||||
self.next()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<T: std::clone::Clone> FusedIterator for DarkTreeIntoIter<T> {}
|
||||
|
||||
/// Define fusion iteration behavior, allowing
|
||||
/// us to use the [`DarkTreeIntoIter`] .into_iter()
|
||||
/// method, to consume the [`DarkTree`] and iterate
|
||||
/// over it.
|
||||
impl<T: std::clone::Clone> IntoIterator for DarkTree<T> {
|
||||
type Item = DarkTreeLeaf<T>;
|
||||
|
||||
type IntoIter = DarkTreeIntoIter<T>;
|
||||
|
||||
fn into_iter(self) -> Self::IntoIter {
|
||||
let mut children = VecDeque::with_capacity(1);
|
||||
children.push_back(self);
|
||||
|
||||
DarkTreeIntoIter { children, parent: None }
|
||||
}
|
||||
}
|
||||
|
||||
/// Auxiliary function to verify provided [`DarkLeaf`] slice is
|
||||
/// properly bounded and its members indexes are valid.
|
||||
fn dark_leaf_vec_integrity_check<T: std::clone::Clone>(
|
||||
leafs: &[DarkLeaf<T>],
|
||||
min_capacity: Option<usize>,
|
||||
max_capacity: Option<usize>,
|
||||
) -> DarkTreeResult<()> {
|
||||
// Setup min capacity
|
||||
let min_capacity = if let Some(min_capacity) = min_capacity {
|
||||
if min_capacity == 0 {
|
||||
1
|
||||
} else {
|
||||
min_capacity
|
||||
}
|
||||
} else {
|
||||
1
|
||||
};
|
||||
|
||||
// Check currect max capacity is not less than
|
||||
// current min capacity
|
||||
if let Some(max_capacity) = max_capacity {
|
||||
if min_capacity > max_capacity {
|
||||
return Err(DarkTreeError::InvalidMaxCapacity(max_capacity, min_capacity))
|
||||
}
|
||||
}
|
||||
|
||||
// Check if min capacity have been not exceeded
|
||||
if leafs.len() < min_capacity {
|
||||
return Err(DarkTreeError::MinCapacityNotExceeded)
|
||||
}
|
||||
|
||||
// Check if max capacity have been exceeded
|
||||
if let Some(max_capacity) = max_capacity {
|
||||
if leafs.len() > max_capacity {
|
||||
return Err(DarkTreeError::MaxCapacityExceeded)
|
||||
}
|
||||
}
|
||||
|
||||
// Check each leaf indexes
|
||||
for (index, leaf) in leafs.iter().enumerate() {
|
||||
// Parent must have our index in their children
|
||||
if let Some(parent_index) = leaf.parent_index {
|
||||
if !leafs[parent_index].children_indexes.contains(&index) {
|
||||
return Err(DarkTreeError::InvalidLeafChildrenIndexes(parent_index))
|
||||
}
|
||||
}
|
||||
|
||||
// Children must have its parent set to us
|
||||
for child_index in &leaf.children_indexes {
|
||||
// Children must have its parent set to us
|
||||
match leafs[*child_index].parent_index {
|
||||
Some(parent_index) => {
|
||||
if parent_index != index {
|
||||
return Err(DarkTreeError::InvalidLeafParentIndex(*child_index))
|
||||
}
|
||||
}
|
||||
None => return Err(DarkTreeError::InvalidLeafParentIndex(*child_index)),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
@@ -1,677 +0,0 @@
|
||||
/* This file is part of DarkFi (https://dark.fi)
|
||||
*
|
||||
* Copyright (C) 2020-2023 Dyne.org foundation
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Affero General Public License as
|
||||
* published by the Free Software Foundation, either version 3 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Affero General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Affero General Public License
|
||||
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
use crate::{dark_leaf_vec_integrity_check, DarkLeaf, DarkTree, DarkTreeLeaf, DarkTreeResult};
|
||||
|
||||
/// Gereate a predefined [`DarkTree`] along with its
|
||||
/// expected traversal order.
|
||||
///
|
||||
/// Tree structure:
|
||||
/// 22
|
||||
/// / | \
|
||||
/// 10 14 21
|
||||
/// / / \ \ / \ / | \
|
||||
/// 2 4 6 9 12 13 17 18 20
|
||||
/// / \ | | / \ | / \ |
|
||||
/// 0 1 3 5 7 8 11 15 16 19
|
||||
///
|
||||
/// Expected traversal order is indicated by each leaf's number
|
||||
fn generate_tree() -> DarkTreeResult<(DarkTree<i32>, Vec<i32>)> {
|
||||
let mut tree = DarkTree::new(
|
||||
22,
|
||||
vec![
|
||||
DarkTree::new(
|
||||
10,
|
||||
vec![
|
||||
DarkTree::new(
|
||||
2,
|
||||
vec![
|
||||
DarkTree::new(0, vec![], None, None),
|
||||
DarkTree::new(1, vec![], None, None),
|
||||
],
|
||||
None,
|
||||
None,
|
||||
),
|
||||
DarkTree::new(4, vec![DarkTree::new(3, vec![], None, None)], None, None),
|
||||
DarkTree::new(6, vec![DarkTree::new(5, vec![], None, None)], None, None),
|
||||
DarkTree::new(
|
||||
9,
|
||||
vec![
|
||||
DarkTree::new(7, vec![], None, None),
|
||||
DarkTree::new(8, vec![], None, None),
|
||||
],
|
||||
None,
|
||||
None,
|
||||
),
|
||||
],
|
||||
None,
|
||||
None,
|
||||
),
|
||||
DarkTree::new(
|
||||
14,
|
||||
vec![
|
||||
DarkTree::new(12, vec![DarkTree::new(11, vec![], None, None)], None, None),
|
||||
DarkTree::new(13, vec![], None, None),
|
||||
],
|
||||
None,
|
||||
None,
|
||||
),
|
||||
DarkTree::new(
|
||||
21,
|
||||
vec![
|
||||
DarkTree::new(
|
||||
17,
|
||||
vec![
|
||||
DarkTree::new(15, vec![], None, None),
|
||||
DarkTree::new(16, vec![], None, None),
|
||||
],
|
||||
None,
|
||||
None,
|
||||
),
|
||||
DarkTree::new(18, vec![], None, None),
|
||||
DarkTree::new(20, vec![DarkTree::new(19, vec![], None, None)], None, None),
|
||||
],
|
||||
None,
|
||||
None,
|
||||
),
|
||||
],
|
||||
None,
|
||||
None,
|
||||
);
|
||||
|
||||
tree.build()?;
|
||||
|
||||
let traversal_order = (0..23).collect();
|
||||
|
||||
Ok((tree, traversal_order))
|
||||
}
|
||||
|
||||
#[test]
|
||||
pub fn test_darktree_iterator() -> DarkTreeResult<()> {
|
||||
let (tree, traversal_order) = generate_tree()?;
|
||||
|
||||
// Use [`DarkTree`] iterator to collect current
|
||||
// data, in order
|
||||
let nums: Vec<i32> = tree.iter().map(|x| x.info.data).collect();
|
||||
|
||||
// Verify iterator collected the data in the expected
|
||||
// traversal order.
|
||||
assert_eq!(nums, traversal_order);
|
||||
|
||||
// Verify using iterator indexing methods to retrieve
|
||||
// data from it, returns the expected one, as per
|
||||
// expected traversal order.
|
||||
assert_eq!(tree.iter().nth(1).unwrap().info.data, traversal_order[1]);
|
||||
|
||||
// Thanks for reading
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_darktree_traversal_order() -> DarkTreeResult<()> {
|
||||
let (mut tree, traversal_order) = generate_tree()?;
|
||||
|
||||
// Loop using the fusion immutable iterator,
|
||||
// verifying we grab the correct [`DarkTreeLeaf`]
|
||||
// immutable reference, as per expected
|
||||
// traversal order.
|
||||
let mut index = 0;
|
||||
for leaf in &tree {
|
||||
assert_eq!(leaf.info.data, traversal_order[index]);
|
||||
index += 1;
|
||||
}
|
||||
|
||||
// Loop using the fusion mutable iterator,
|
||||
// verifying we grab the correct [`DarkTreeLeaf`]
|
||||
// mutable reference, as per expected traversal
|
||||
// order.
|
||||
index = 0;
|
||||
for leaf in &mut tree {
|
||||
assert_eq!(leaf.info.data, traversal_order[index]);
|
||||
index += 1;
|
||||
}
|
||||
|
||||
// Loop using [`DarkTree`] .iter_mut() mutable
|
||||
// iterator, verifying we grab the correct [`DarkTreeLeaf`]
|
||||
// mutable reference, as per expected traversal
|
||||
// order.
|
||||
for (index, leaf) in tree.iter_mut().enumerate() {
|
||||
assert_eq!(leaf.info.data, traversal_order[index]);
|
||||
}
|
||||
|
||||
// Loop using [`DarkTree`] .iter() immutable
|
||||
// iterator, verifying we grab the correct [`DarkTreeLeaf`]
|
||||
// immutable reference, as per expected traversal
|
||||
// order.
|
||||
for (index, leaf) in tree.iter().enumerate() {
|
||||
assert_eq!(leaf.info.data, traversal_order[index]);
|
||||
}
|
||||
|
||||
// Loop using [`DarkTree`] .into_iter() iterator,
|
||||
// which consumes (moves) the tree, verifying we
|
||||
// collect the correct [`DarkTreeLeaf`], as per expected
|
||||
// traversal order.
|
||||
for (index, leaf) in tree.into_iter().enumerate() {
|
||||
assert_eq!(leaf.info.data, traversal_order[index]);
|
||||
}
|
||||
|
||||
// Thanks for reading
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_darktree_mut_iterator() -> DarkTreeResult<()> {
|
||||
let (mut tree, _) = generate_tree()?;
|
||||
|
||||
// Loop using [`DarkTree`] .iter_mut() mutable
|
||||
// iterator, grabing a mutable reference over a
|
||||
// [`DarkTreeLeaf`], and mutating its inner data.
|
||||
for leaf in tree.iter_mut() {
|
||||
leaf.info.data += 1;
|
||||
}
|
||||
|
||||
// Loop using the fusion mutable iterator,
|
||||
// grabing a mutable reference over a
|
||||
// [`DarkTreeLeaf`], and mutating its inner data.
|
||||
for leaf in &mut tree {
|
||||
leaf.info.data += 1;
|
||||
}
|
||||
|
||||
// Verify performed mutation actually happened
|
||||
// on original tree. Additionally we verify all
|
||||
// indexes are the expected ones.
|
||||
assert_eq!(
|
||||
tree,
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 22,
|
||||
info: DarkLeaf { data: 24, parent_index: None, children_indexes: vec![10, 14, 21] },
|
||||
},
|
||||
children: vec![
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 10,
|
||||
info: DarkLeaf {
|
||||
data: 12,
|
||||
parent_index: Some(22),
|
||||
children_indexes: vec![2, 4, 6, 9],
|
||||
},
|
||||
},
|
||||
children: vec![
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 2,
|
||||
info: DarkLeaf {
|
||||
data: 4,
|
||||
parent_index: Some(10),
|
||||
children_indexes: vec![0, 1],
|
||||
},
|
||||
},
|
||||
children: vec![
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 0,
|
||||
info: DarkLeaf {
|
||||
data: 2,
|
||||
parent_index: Some(2),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 1,
|
||||
info: DarkLeaf {
|
||||
data: 3,
|
||||
parent_index: Some(2),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 4,
|
||||
info: DarkLeaf {
|
||||
data: 6,
|
||||
parent_index: Some(10),
|
||||
children_indexes: vec![3],
|
||||
},
|
||||
},
|
||||
children: vec![DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 3,
|
||||
info: DarkLeaf {
|
||||
data: 5,
|
||||
parent_index: Some(4),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 6,
|
||||
info: DarkLeaf {
|
||||
data: 8,
|
||||
parent_index: Some(10),
|
||||
children_indexes: vec![5],
|
||||
},
|
||||
},
|
||||
children: vec![DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 5,
|
||||
info: DarkLeaf {
|
||||
data: 7,
|
||||
parent_index: Some(6),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 9,
|
||||
info: DarkLeaf {
|
||||
data: 11,
|
||||
parent_index: Some(10),
|
||||
children_indexes: vec![7, 8],
|
||||
},
|
||||
},
|
||||
children: vec![
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 7,
|
||||
info: DarkLeaf {
|
||||
data: 9,
|
||||
parent_index: Some(9),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 8,
|
||||
info: DarkLeaf {
|
||||
data: 10,
|
||||
parent_index: Some(9),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 14,
|
||||
info: DarkLeaf {
|
||||
data: 16,
|
||||
parent_index: Some(22),
|
||||
children_indexes: vec![12, 13],
|
||||
},
|
||||
},
|
||||
children: vec![
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 12,
|
||||
info: DarkLeaf {
|
||||
data: 14,
|
||||
parent_index: Some(14),
|
||||
children_indexes: vec![11],
|
||||
},
|
||||
},
|
||||
children: vec![DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 11,
|
||||
info: DarkLeaf {
|
||||
data: 13,
|
||||
parent_index: Some(12),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 13,
|
||||
info: DarkLeaf {
|
||||
data: 15,
|
||||
parent_index: Some(14),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 21,
|
||||
info: DarkLeaf {
|
||||
data: 23,
|
||||
parent_index: Some(22),
|
||||
children_indexes: vec![17, 18, 20],
|
||||
},
|
||||
},
|
||||
children: vec![
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 17,
|
||||
info: DarkLeaf {
|
||||
data: 19,
|
||||
parent_index: Some(21),
|
||||
children_indexes: vec![15, 16],
|
||||
},
|
||||
},
|
||||
children: vec![
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 15,
|
||||
info: DarkLeaf {
|
||||
data: 17,
|
||||
parent_index: Some(17),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 16,
|
||||
info: DarkLeaf {
|
||||
data: 18,
|
||||
parent_index: Some(17),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 18,
|
||||
info: DarkLeaf {
|
||||
data: 20,
|
||||
parent_index: Some(21),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 20,
|
||||
info: DarkLeaf {
|
||||
data: 22,
|
||||
parent_index: Some(21),
|
||||
children_indexes: vec![19]
|
||||
},
|
||||
},
|
||||
children: vec![DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 19,
|
||||
info: DarkLeaf {
|
||||
data: 21,
|
||||
parent_index: Some(20),
|
||||
children_indexes: vec![],
|
||||
},
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
}
|
||||
);
|
||||
|
||||
let traversal_order: Vec<i32> = (2..25).collect();
|
||||
|
||||
// Use [`DarkTree`] iterator to collect current
|
||||
// data, in order
|
||||
let nums: Vec<i32> = tree.iter().map(|x| x.info.data).collect();
|
||||
|
||||
// Verify iterator collected the data in the expected
|
||||
// traversal order.
|
||||
assert_eq!(nums, traversal_order);
|
||||
|
||||
// Thanks for reading
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[test]
|
||||
pub fn test_darktree_min_capacity() -> DarkTreeResult<()> {
|
||||
// Generate a new [`DarkTree`] with min capacity 0
|
||||
let mut tree = DarkTree::new(0, vec![], Some(0), None);
|
||||
|
||||
// Verify that min capacity was properly setup to 1
|
||||
assert_eq!(
|
||||
tree,
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 0,
|
||||
info: DarkLeaf { data: 0, parent_index: None, children_indexes: vec![] },
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None
|
||||
}
|
||||
);
|
||||
|
||||
// Verify that building it will succeed, as capacity
|
||||
// would have ben setup to 1
|
||||
assert!(tree.build().is_ok());
|
||||
|
||||
// Generate a new [`DarkTree`] manually with
|
||||
// min capacity 0
|
||||
let mut tree = DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 0,
|
||||
info: DarkLeaf { data: 0, parent_index: None, children_indexes: vec![] },
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 0,
|
||||
max_capacity: None,
|
||||
};
|
||||
|
||||
// Verify that building it will fail
|
||||
assert!(tree.build().is_err());
|
||||
|
||||
// Thanks for reading
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[test]
|
||||
pub fn test_darktree_max_capacity() -> DarkTreeResult<()> {
|
||||
// Generate a new [`DarkTree`] with max capacity 2
|
||||
let mut tree = DarkTree::new(0, vec![], None, Some(2));
|
||||
|
||||
// Append a new node
|
||||
tree.append(DarkTree::new(1, vec![], None, None))?;
|
||||
|
||||
// Try to append a new node
|
||||
assert!(tree.append(DarkTree::new(2, vec![], None, None)).is_err());
|
||||
|
||||
// Verify tree builds
|
||||
tree.build()?;
|
||||
|
||||
// Generate a new [`DarkTree`] with max capacity 2
|
||||
let mut new_tree = DarkTree::new(3, vec![], None, Some(2));
|
||||
|
||||
// Append the previous tree as a new node
|
||||
new_tree.append(tree)?;
|
||||
|
||||
// Check that max capacity has been exceeded
|
||||
assert!(new_tree.check_max_capacity().is_err());
|
||||
|
||||
// Generate a new [`DarkTree`] manually with
|
||||
// max capacity 1
|
||||
let mut tree = DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 0,
|
||||
info: DarkLeaf { data: 0, parent_index: None, children_indexes: vec![] },
|
||||
},
|
||||
children: vec![
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 0,
|
||||
info: DarkLeaf { data: 0, parent_index: None, children_indexes: vec![] },
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 0,
|
||||
info: DarkLeaf { data: 0, parent_index: None, children_indexes: vec![] },
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
DarkTree {
|
||||
leaf: DarkTreeLeaf {
|
||||
index: 0,
|
||||
info: DarkLeaf { data: 0, parent_index: None, children_indexes: vec![0] },
|
||||
},
|
||||
children: vec![],
|
||||
min_capacity: 1,
|
||||
max_capacity: None,
|
||||
},
|
||||
],
|
||||
min_capacity: 1,
|
||||
max_capacity: Some(1),
|
||||
};
|
||||
|
||||
// Verify that building it will fail
|
||||
assert!(tree.build().is_err());
|
||||
|
||||
// Generate a new [`DarkTree`] with max capacity 0,
|
||||
// which is less that current min capacity 1
|
||||
let mut tree = DarkTree::new(0, vec![], None, Some(0));
|
||||
|
||||
// Verify that building it will fail
|
||||
assert!(tree.build().is_err());
|
||||
|
||||
// Thanks for reading
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[test]
|
||||
pub fn test_darktree_flattened_vec() -> DarkTreeResult<()> {
|
||||
let (mut tree, traversal_order) = generate_tree()?;
|
||||
|
||||
// Build the flattened vector
|
||||
let vec = tree.build_vec()?;
|
||||
|
||||
// Verify vector integrity
|
||||
dark_leaf_vec_integrity_check(&vec, Some(23), Some(23))?;
|
||||
|
||||
// Verify vector integrity will fail using different bounds:
|
||||
// 1. Leafs less that min capacity
|
||||
assert!(dark_leaf_vec_integrity_check(&vec, Some(24), None).is_err());
|
||||
// 2. Leafs more than max capacity
|
||||
assert!(dark_leaf_vec_integrity_check(&vec, None, Some(22)).is_err());
|
||||
// 3. Max capacity less than min capacity
|
||||
assert!(dark_leaf_vec_integrity_check(&vec, Some(23), Some(22)).is_err());
|
||||
|
||||
// Loop the vector to verify it follows expected
|
||||
// traversal order.
|
||||
let mut index = 0;
|
||||
for leaf in vec {
|
||||
assert_eq!(leaf.data, traversal_order[index]);
|
||||
index += 1;
|
||||
}
|
||||
|
||||
// Verify the tree is still intact
|
||||
let (new_tree, _) = generate_tree()?;
|
||||
assert_eq!(tree, new_tree);
|
||||
|
||||
// Generate a new [`DarkLeaf`] vector manually,
|
||||
// corresponding to a [`DarkTree`] with a 2 children,
|
||||
// with erroneous indexes
|
||||
let vec = vec![
|
||||
DarkLeaf { data: 0, parent_index: Some(2), children_indexes: vec![] },
|
||||
DarkLeaf { data: 0, parent_index: Some(2), children_indexes: vec![] },
|
||||
DarkLeaf { data: 0, parent_index: None, children_indexes: vec![0, 2] },
|
||||
];
|
||||
|
||||
// Verify vector integrity will fail
|
||||
assert!(dark_leaf_vec_integrity_check(&vec, None, None).is_err());
|
||||
|
||||
// Thanks for reading
|
||||
Ok(())
|
||||
}
|
||||
Reference in New Issue
Block a user