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use crate::Tree;
use std::collections::VecDeque;
pub struct BfIter<'a,T>{
pub (in crate) queue : VecDeque<&'a Tree<T>>
}
pub struct BfIterMut<'a,T>{
pub (in crate) queue : VecDeque<&'a mut Tree<T>>
}
impl<'a,T> BfIter<'a,T> {
pub fn depth(self) -> BfDepthIter<'a,T>{
let mut s = self;
let mut v = VecDeque::new();
v.push_back((0,s.queue.pop_front().unwrap()));
BfDepthIter {
queue : v
}
}
}
impl<'a,T> BfIterMut<'a,T>{
pub fn depth(self) -> BfDepthIterMut<'a,T> {
let mut s = self;
let mut v = VecDeque::new();
v.push_back((0,s.queue.pop_front().unwrap()));
BfDepthIterMut {
queue : v
}
}
}
impl<'a,T> Iterator for BfIter<'a,T>{
type Item = &'a T;
fn next(&mut self) -> Option<Self::Item> {
if let Some(now) = self.queue.pop_front() {
for child in now.children.iter() {
self.queue.push_back(child);
}
Some(&now.data)
}else{
Option::None
}
}
}
impl<'a,T> Iterator for BfIterMut<'a,T>{
type Item = &'a mut T;
fn next(&mut self) -> Option<Self::Item> {
if let Some(now) = self.queue.pop_front() {
for child in now.children.iter_mut() {
self.queue.push_back(child);
}
Some(&mut now.data)
}else{
Option::None
}
}
}
pub struct BfDepthIter<'a,T> {
queue : VecDeque<(usize,&'a Tree<T>)>
}
pub struct BfDepthIterMut<'a,T> {
queue : VecDeque<(usize,&'a mut Tree<T>)>
}
impl<'a,T> Iterator for BfDepthIter<'a,T> {
type Item = (usize,&'a T);
fn next(&mut self) -> Option<Self::Item> {
if let Some((dpth,now)) = self.queue.pop_front() {
for child in now.children.iter() {
self.queue.push_back((dpth + 1,child));
}
Some((dpth,&now.data))
}else{
Option::None
}
}
}
impl<'a,T> Iterator for BfDepthIterMut<'a,T> {
type Item = (usize,&'a mut T);
fn next(&mut self) -> Option<Self::Item> {
if let Some((dpth,now)) = self.queue.pop_front() {
for child in now.children.iter_mut() {
self.queue.push_back((dpth + 1,child));
}
Some((dpth,&mut now.data))
}else{
Option::None
}
}
}