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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(*i $Id: univ.mli,v 1.21.14.1 2004/07/16 19:30:28 herbelin Exp $ i*)
(* Universes. *)
type universe
val prop_univ : universe
val make_univ : Names.dir_path * int -> universe
(* The type of a universe *)
val super : universe -> universe
(* The max of 2 universes *)
val sup : universe -> universe -> universe
(*s Graphs of universes. *)
type universes
(* The empty graph of universes *)
val initial_universes : universes
(*s Constraints. *)
module Constraint : Set.S
type constraints = Constraint.t
type constraint_function = universe -> universe -> constraints -> constraints
val enforce_geq : constraint_function
val enforce_eq : constraint_function
(*s Merge of constraints in a universes graph.
The function [merge_constraints] merges a set of constraints in a given
universes graph. It raises the exception [UniverseInconsistency] if the
constraints are not satisfiable. *)
exception UniverseInconsistency
val merge_constraints : constraints -> universes -> universes
(*s Pretty-printing of universes. *)
val pr_uni : universe -> Pp.std_ppcmds
val pr_universes : universes -> Pp.std_ppcmds
val string_of_univ : universe -> string
(*s Dumping to a file *)
val dump_universes : out_channel -> universes -> unit
val hcons1_univ : universe -> universe
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