#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub enum TreePart {
    /// `├──`
    First,
    /// `│  `
    Wait,
    /// `└──`
    Last,
    /// (blank)
    Blank
}
impl TreePart {
    /// convert to ascii art
    pub const fn display(self) -> &'static str {
        match self {
            Self::First => "├── ",
            Self::Wait  => "│   ",
            Self::Last  => "└── ",
            Self::Blank => "    ",
        }
    }
}