pub struct RelativePath {
    pub segments: Vec<String>
}
pub struct AbsolutePath {
    pub segments: Vec<PathSegment>
}

#[derive(Clone, Debug, PartialEq)]
enum PathSegment {
    Placeholder(String),
    Literal(String)
}

impl AbsolutePath {
    pub fn append(&mut self, mut path: RelativePath) {
        // &mut path.segments
        let &mut lits = path.segments.iter_mut().map(|s| PathSegment::Literal(s.to_string())).collect();
        self.segments.append(lits);
    }
}

fn main() {}