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(***************************************************************************)
(* Morsmall *)
(* A concise AST for POSIX shell *)
(* *)
(* Copyright (C) 2017,2018,2019 Yann Régis-Gianas, Ralf Treinen, *)
(* Nicolas Jeannerod *)
(* *)
(* This program is free software: you can redistribute it and/or modify *)
(* it under the terms of the GNU General Public License as published by *)
(* the Free Software Foundation, either version 3 of the License, or *)
(* (at your option) any later version. *)
(* *)
(* This program is distributed in the hope that it will be useful, *)
(* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *)
(* GNU General Public License for more details. *)
(* *)
(* You should have received a copy of the GNU General Public License *)
(* along with this program. If not, see <http://www.gnu.org/licenses/>. *)
(***************************************************************************)
(** abstract syntax of test expressions *)
type expression =
| And of expression * expression
| Or of expression * expression
| Not of expression
| Binary of string * string * string (* (op,arg_left,arg_right) *)
| Unary of string * string (* (op,arg) *)
| Single of string (* arg *)
exception Parse_error
(** [parse ~bracket wl] parses the list of words [wl] as a test
expression (or [None] if [wl] is empty). If [bracket] is [true]
then the last word of [wl] must be a right bracket. *)
val parse: ?bracket:bool -> string list -> expression option
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