logparse-pretty-print 0.1.0

pretty print tree
Documentation 
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#![allow(unused)]
use SExp::*;
use pretty_print::*;
enum SExp {
    Atom(u32),
    List(Vec<SExp>),
}

impl SExp {
    /// Return a pretty printed format of self.
    pub fn to_doc<'a>(&self) -> PrettyTree<'a> {
        match self {
            Atom(x) => PrettyTree::text(x.to_string()),
            List(xs) => PrettyTree::text("(")
                .append(PrettyTree::join(xs.iter().map(|x| x.to_doc()), PrettyTree::line_or_space()).nest(1).group())
                .append(PrettyTree::text(")")),
        }
    }
    /// Return a pretty printed format of self.
    pub fn to_pretty(&self, width: usize) -> String {
        let mut w = Vec::new();
        self.to_doc().render(width, &mut w).unwrap();
        String::from_utf8(w).unwrap()
    }
}

fn main() {
    let atom = Atom(5);
    assert_eq!("5", atom.to_pretty(10));
    let list = List(vec![Atom(1), Atom(2), Atom(3)]);
    assert_eq!("(1 2 3)", list.to_pretty(10));
    assert_eq!(
        "\
(1
 2
 3)",
        list.to_pretty(5)
    );
}