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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2015 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Univ
(** {6 Graphs of universes. } *)
type t
type universes = t
type 'a check_function = universes -> 'a -> 'a -> bool
val check_leq : universe check_function
val check_eq : universe check_function
(** The empty graph of universes *)
val empty_universes : universes
(** The initial graph of universes: Prop < Set *)
val initial_universes : universes
val is_initial_universes : universes -> bool
val sort_universes : universes -> universes
(** Adds a universe to the graph, ensuring it is >= or > Set.
@raises AlreadyDeclared if the level is already declared in the graph. *)
exception AlreadyDeclared
val add_universe : universe_level -> bool -> universes -> universes
(** {6 ... } *)
(** 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. *)
val enforce_constraint : univ_constraint -> universes -> universes
val merge_constraints : constraints -> universes -> universes
val constraints_of_universes : universes -> constraints
val check_constraint : universes -> univ_constraint -> bool
val check_constraints : constraints -> universes -> bool
val check_eq_instances : Instance.t check_function
(** Check equality of instances w.r.t. a universe graph *)
(** {6 Pretty-printing of universes. } *)
val pr_universes : (Level.t -> Pp.std_ppcmds) -> universes -> Pp.std_ppcmds
(** {6 Dumping to a file } *)
val dump_universes :
(constraint_type -> string -> string -> unit) ->
universes -> unit
(** {6 Debugging} *)
val check_universes_invariants : universes -> unit
|
