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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \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) *)
(************************************************************************)
(** Legacy proof engine. Do not use in newly written code. *)
open Evd
open Constr
(** This module defines the structure of proof tree and the tactic type. So, it
is used by [Proof_tree] and [Refiner] *)
type prim_rule =
| Refine of constr
(** Nowadays, the only rules we'll consider are the primitive rules *)
type rule = prim_rule
type goal = Goal.goal
type tactic = goal sigma -> goal list sigma
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