module Error = struct
  open Condition

  let parse_error msg = condition "parse-error" msg empty
end

let of_sexp sexp =
  let sexp = match sexp with Sexplib.Sexp.List [atom] -> atom | other -> other in
  match Ast.statement_of_sexp sexp with
  | stmt -> Ok stmt
  | exception exn -> Error (Error.parse_error (Printexc.to_string exn))

let of_string s = of_sexp (Sexplib.Sexp.of_string s)
let to_string stmt = Ast.sexp_of_statement stmt |> Sexplib.Sexp.to_string_hum