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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Util
open Names
open Term
open Environ
open Univ
val set_minimization : bool ref
val is_set_minimization : unit -> bool
(** Universes *)
val pr_with_global_universes : Level.t -> Pp.std_ppcmds
(** Local universe name <-> level mapping *)
type universe_binders = (Id.t * Univ.universe_level) list
val register_universe_binders : Globnames.global_reference -> universe_binders -> unit
val universe_binders_of_global : Globnames.global_reference -> universe_binders
(** The global universe counter *)
val set_remote_new_univ_level : universe_level RemoteCounter.installer
(** Side-effecting functions creating new universe levels. *)
val new_univ_level : Names.dir_path -> universe_level
val new_univ : Names.dir_path -> universe
val new_Type : Names.dir_path -> types
val new_Type_sort : Names.dir_path -> sorts
val new_global_univ : unit -> universe in_universe_context_set
val new_sort_in_family : sorts_family -> sorts
(** {6 Constraints for type inference}
When doing conversion of universes, not only do we have =/<= constraints but
also Lub constraints which correspond to unification of two levels which might
not be necessary if unfolding is performed.
*)
type universe_constraint_type = ULe | UEq | ULub
type universe_constraint = universe * universe_constraint_type * universe
module Constraints : sig
include Set.S with type elt = universe_constraint
val pr : t -> Pp.std_ppcmds
end
type universe_constraints = Constraints.t
type 'a constraint_accumulator = universe_constraints -> 'a -> 'a option
type 'a universe_constrained = 'a * universe_constraints
type 'a universe_constraint_function = 'a -> 'a -> universe_constraints -> universe_constraints
val subst_univs_universe_constraints : universe_subst_fn ->
universe_constraints -> universe_constraints
val enforce_eq_instances_univs : bool -> universe_instance universe_constraint_function
val to_constraints : UGraph.t -> universe_constraints -> constraints
(** [eq_constr_univs_infer u a b] is [true, c] if [a] equals [b] modulo alpha, casts,
application grouping, the universe constraints in [u] and additional constraints [c]. *)
val eq_constr_univs_infer : UGraph.t -> 'a constraint_accumulator ->
constr -> constr -> 'a -> 'a option
(** [eq_constr_univs_infer_With kind1 kind2 univs m n] is a variant of
{!eq_constr_univs_infer} taking kind-of-term functions, to expose
subterms of [m] and [n], arguments. *)
val eq_constr_univs_infer_with :
(constr -> (constr, types, Sorts.t, Univ.Instance.t) kind_of_term) ->
(constr -> (constr, types, Sorts.t, Univ.Instance.t) kind_of_term) ->
UGraph.t -> 'a constraint_accumulator -> constr -> constr -> 'a -> 'a option
(** [leq_constr_univs u a b] is [true, c] if [a] is convertible to [b]
modulo alpha, casts, application grouping, the universe constraints
in [u] and additional constraints [c]. *)
val leq_constr_univs_infer : UGraph.t -> 'a constraint_accumulator ->
constr -> constr -> 'a -> 'a option
(** [eq_constr_universes a b] [true, c] if [a] equals [b] modulo alpha, casts,
application grouping and the universe constraints in [c]. *)
val eq_constr_universes : constr -> constr -> universe_constraints option
(** [leq_constr_universes a b] [true, c] if [a] is convertible to [b] modulo
alpha, casts, application grouping and the universe constraints in [c]. *)
val leq_constr_universes : constr -> constr -> universe_constraints option
(** [eq_constr_universes a b] [true, c] if [a] equals [b] modulo alpha, casts,
application grouping and the universe constraints in [c]. *)
val eq_constr_universes_proj : env -> constr -> constr -> bool universe_constrained
(** Build a fresh instance for a given context, its associated substitution and
the instantiated constraints. *)
val fresh_instance_from_context : universe_context ->
universe_instance constrained
val fresh_instance_from : universe_context -> universe_instance option ->
universe_instance in_universe_context_set
val fresh_sort_in_family : env -> sorts_family ->
sorts in_universe_context_set
val fresh_constant_instance : env -> constant ->
pconstant in_universe_context_set
val fresh_inductive_instance : env -> inductive ->
pinductive in_universe_context_set
val fresh_constructor_instance : env -> constructor ->
pconstructor in_universe_context_set
val fresh_global_instance : ?names:Univ.Instance.t -> env -> Globnames.global_reference ->
constr in_universe_context_set
val fresh_global_or_constr_instance : env -> Globnames.global_reference_or_constr ->
constr in_universe_context_set
(** Get fresh variables for the universe context.
Useful to make tactics that manipulate constrs in universe contexts polymorphic. *)
val fresh_universe_context_set_instance : universe_context_set ->
universe_level_subst * universe_context_set
(** Raises [Not_found] if not a global reference. *)
val global_of_constr : constr -> Globnames.global_reference puniverses
val constr_of_global_univ : Globnames.global_reference puniverses -> constr
val extend_context : 'a in_universe_context_set -> universe_context_set ->
'a in_universe_context_set
(** Simplification and pruning of constraints:
[normalize_context_set ctx us]
- Instantiate the variables in [us] with their most precise
universe levels respecting the constraints.
- Normalizes the context [ctx] w.r.t. equality constraints,
choosing a canonical universe in each equivalence class
(a global one if there is one) and transitively saturate
the constraints w.r.t to the equalities. *)
module UF : Unionfind.PartitionSig with type elt = universe_level
type universe_opt_subst = universe option universe_map
val make_opt_subst : universe_opt_subst -> universe_subst_fn
val subst_opt_univs_constr : universe_opt_subst -> constr -> constr
val normalize_context_set : universe_context_set ->
universe_opt_subst (* The defined and undefined variables *) ->
universe_set (* univ variables that can be substituted by algebraics *) ->
(universe_opt_subst * universe_set) in_universe_context_set
val normalize_univ_variables : universe_opt_subst ->
universe_opt_subst * universe_set * universe_set * universe_subst
val normalize_univ_variable :
find:(universe_level -> universe) ->
update:(universe_level -> universe -> universe) ->
universe_level -> universe
val normalize_univ_variable_opt_subst : universe_opt_subst ref ->
(universe_level -> universe)
val normalize_univ_variable_subst : universe_subst ref ->
(universe_level -> universe)
val normalize_universe_opt_subst : universe_opt_subst ref ->
(universe -> universe)
val normalize_universe_subst : universe_subst ref ->
(universe -> universe)
(** Create a fresh global in the global environment, without side effects.
BEWARE: this raises an ANOMALY on polymorphic constants/inductives:
the constraints should be properly added to an evd.
See Evd.fresh_global, Evarutil.new_global, and pf_constr_of_global for
the proper way to get a fresh copy of a global reference. *)
val constr_of_global : Globnames.global_reference -> constr
(** ** DEPRECATED ** synonym of [constr_of_global] *)
val constr_of_reference : Globnames.global_reference -> constr
(** [unsafe_constr_of_global gr] turns [gr] into a constr, works on polymorphic
references by taking the original universe instance that is not recorded
anywhere. The constraints are forgotten as well. DO NOT USE in new code. *)
val unsafe_constr_of_global : Globnames.global_reference -> constr in_universe_context
(** Returns the type of the global reference, by creating a fresh instance of polymorphic
references and computing their instantiated universe context. (side-effect on the
universe counter, use with care). *)
val type_of_global : Globnames.global_reference -> types in_universe_context_set
(** [unsafe_type_of_global gr] returns [gr]'s type, works on polymorphic
references by taking the original universe instance that is not recorded
anywhere. The constraints are forgotten as well.
USE with care. *)
val unsafe_type_of_global : Globnames.global_reference -> types
(** Full universes substitutions into terms *)
val nf_evars_and_universes_opt_subst : (existential -> constr option) ->
universe_opt_subst -> constr -> constr
(** Shrink a universe context to a restricted set of variables *)
val universes_of_constr : constr -> universe_set
val restrict_universe_context : universe_context_set -> universe_set -> universe_context_set
val simplify_universe_context : universe_context_set ->
universe_context_set * universe_level_subst
val refresh_constraints : UGraph.t -> universe_context_set -> universe_context_set * UGraph.t
(** Pretty-printing *)
val pr_universe_opt_subst : universe_opt_subst -> Pp.std_ppcmds
(** {6 Support for template polymorphism } *)
val solve_constraints_system : universe option array -> universe array -> universe array ->
universe array
|
