mod Lang.Bolt.AST {

  pub struct Pos {
    offset: Int,
    line: Int,
    column: Int,
  }

  pub struct Span {
    file: File,
    start: TextPos,
    end: TextPos,
  }

  pub struct Identifier {
    text: String,
    span: Option<Span>,
    orig_node: Option<Node>,
    parent: Option<Node>,
  }

}