1 (* Copyright (C) 2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
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26 exception Error of string
34 val is_goal_closed: goal -> proof -> bool
35 val goals_of_proof: proof -> goal list
38 tactic -> proof -> goal ->
39 proof * goal list * goal list (** new proof, opened goals, closed goals *)
42 module Make (E:Engine) :
44 type goal_switch = Open of E.goal | Closed of E.goal
45 type 'a stack = 'a list
47 E.proof * ((int * goal_switch) list * E.goal list * E.goal list) stack
61 | Select of E.goal list
64 | Tactical of tactical
68 val eval: t -> status -> status
69 val init: E.proof -> status