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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
Require Import Ltac2.Init.
Ltac2 Type t := string.
Ltac2 @external make : int -> char -> string := "coq-core.plugins.ltac2" "string_make".
Ltac2 @external length : string -> int := "coq-core.plugins.ltac2" "string_length".
Ltac2 @external get : string -> int -> char := "coq-core.plugins.ltac2" "string_get".
Ltac2 @external set : string -> int -> char -> unit := "coq-core.plugins.ltac2" "string_set".
Ltac2 @external concat : string -> string list -> string := "coq-core.plugins.ltac2" "string_concat".
Ltac2 @external app : string -> string -> string := "coq-core.plugins.ltac2" "string_app".
Ltac2 @external sub : string -> int -> int -> string := "coq-core.plugins.ltac2" "string_sub".
Ltac2 @external equal : string -> string -> bool := "coq-core.plugins.ltac2" "string_equal".
Ltac2 @external compare : string -> string -> int := "coq-core.plugins.ltac2" "string_compare".
Ltac2 is_empty s := match s with "" => true | _ => false end.
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