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(*  -*- tuareg -*-                                                        *)
(*                                                                        *)
(*  Copyright (C) 2017,2018 Yann Régis-Gianas, Nicolas Jeannerod,         *)
(*  Ralf Treinen.                                                         *)
(*                                                                        *)
(*  This is free software: you can redistribute it and/or modify it       *)
(*  under the terms of the GNU General Public License, version 3.         *)
(*                                                                        *)
(*  Additional terms apply, due to the reproduction of portions of        *)
(*  the POSIX standard. Please refer to the file COPYING for details.     *)
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type t =
  | Backquotes of char * int
  | Parentheses
  | Braces
  | DQuotes
  | HereDocument of bool * string

val to_string : t -> string

val under_backquoted_style_command_substitution : t list -> bool