(* This file is part of the Catala compiler, a specification language for tax
   and social benefits computation rules. Copyright (C) 2020 Inria, contributor:
   Denis Merigoux <denis.merigoux@inria.fr>

   Licensed under the Apache License, Version 2.0 (the "License"); you may not
   use this file except in compliance with the License. You may obtain a copy of
   the License at

   http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   License for the specific language governing permissions and limitations under
   the License. *)

(** Source code position *)

type t
(** A position in the source code is a file, as well as begin and end location
    of the form col:line *)

(**{2 Constructor and getters}*)

val from_lpos : Lexing.position * Lexing.position -> t
val from_info : string -> int -> int -> int -> int -> t
val overwrite_law_info : t -> string list -> t
val get_law_info : t -> string list
val get_start_line : t -> int
val get_start_column : t -> int
val get_end_line : t -> int
val get_end_column : t -> int
val get_file : t -> string

val join : t -> t -> t
(** Returns the smallest range including both supplied ranges.

    @raise Invalid_argument
      if they don't belong to the same file. The law position used is the one of
      the earliest position. *)

(**{2 Formatters}*)

val to_string : t -> string
(** Formats a position like this:

    {v in file <file>, from <start_line>:<start_col> to <end_line>:<end_col> v} *)

val to_string_short : t -> string
(** Formats a position like this:

    {v <file>;<start_line>:<start_col>--<end_line>:<end_col> v}

    This function is compliant with the
    {{:https://www.gnu.org/prep/standards/standards.html#Errors} GNU coding
      standards}. *)

val format_loc_text : Format.formatter -> t -> unit
(** Open the file corresponding to the position and retrieves the text concerned
    by the position *)

val format_loc_text_parts :
  t ->
  (Format.formatter -> unit)
  * (Format.formatter -> unit)
  * (Format.formatter -> unit) option
(** Like [format_loc_text], but returns the printing functions in 3 separate
    parts: the file name header, the line context, and the law headers *)

val no_pos : t
(** Placeholder position *)