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(***********************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA-Rocquencourt & LRI-CNRS-Orsay *)
(* \VV/ *************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(***********************************************************************)
(*i $Id$ i*)
(*i*)
open Names
(*i*)
(* Universes. *)
type universe
val dummy_univ : universe
val implicit_univ : universe
val prop_univ : universe
val prop_univ_univ : universe
val set_module : dir_path -> unit
val new_univ : unit -> universe
(*s Graphs of universes. *)
type universes
val initial_universes : universes
(*s Constraints. *)
type constraint_type = Gt | Geq | Eq
type univ_constraint = universe * constraint_type * universe
module Constraint : Set.S with type elt = univ_constraint
type constraints = Constraint.t
type constraint_function = universe -> universe -> constraints -> constraints
val enforce_gt : constraint_function
val enforce_geq : constraint_function
val enforce_eq : constraint_function
val super : universe -> universe * constraints
val sup : universe -> universe -> universes -> universe * constraints
(*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
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