im_ternary_tree 0.0.20

Structural sharing ternary tree, i.e. immutable data structure
Documentation 
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extern crate im_ternary_tree;
use im_ternary_tree::TernaryTreeList;

pub fn main() -> Result<(), String> {
  let mut tree: TernaryTreeList<usize> = TernaryTreeList::Empty;

  for idx in 0..60 {
    tree = tree.push_right(idx);
  }

  for _ in 0..59 {
    tree = tree.drop_right();
    println!("{}", tree.format_inline());
  }

  let mut origin4: Vec<usize> = vec![];
  for idx in 0..60 {
    origin4.push(idx);
  }
  let mut data4 = TernaryTreeList::from(&origin4);

  for _ in 0..59 {
    data4 = data4.drop_right();
    println!("{}", data4.format_inline());
  }

  // let mut data = TernaryTreeList::Empty;

  // for idx in 0..1000 {
  //   data = data.push(idx)
  // }

  // let mut d = data;

  // while d.len() > 1 {
  //   d = d.drop_right();
  //   println!("{}", d.format_inline());
  // }

  Ok(())
}