Source file node.ml

(**********************************************************************************************)
(*                                                                                            *)
(* This file is part of shakuhachi: a music collection manager                                *)
(* Copyright (C) 2025 Yves Ndiaye                                                             *)
(*                                                                                            *)
(* shakuhachi 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.                    *)
(*                                                                                            *)
(* shakuhachi 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 shakuhachi.   *)
(* If not, see <http://www.gnu.org/licenses/>.                                                *)
(*                                                                                            *)
(**********************************************************************************************)

(** Operations on a query node. *)

(** type of a query node. *)
type t = Substring of string | Field of Field.t

(** [substring s] is [Substring s]. *)
let substring s = Substring s

(** [field f] is [Field f] . *)
let field field = Field field

let to_string = function
  | Substring s ->
      s
  | Field field ->
      Field.to_string field

let to_sexp = function
  | Substring s ->
      Util.quote s
  | Field field ->
      Field.to_sexp field