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|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
open Names
open Environ
open Evd
open EConstr
open Reductionops
open Pattern
open Locus
open Ltac_pretype
(** Here the semantics is completely unclear.
What does "Hint Unfold t" means when "t" is a parameter?
Does the user mean "Unfold X.t" or does she mean "Unfold y"
where X.t is later on instantiated with y? I choose the first
interpretation (i.e. an evaluable reference is never expanded). *)
val subst_evaluable_reference :
Mod_subst.substitution -> Evaluable.t -> Evaluable.t
type reduction_tactic_error =
InvalidAbstraction of env * evar_map * constr * (env * Type_errors.type_error)
exception ReductionTacticError of reduction_tactic_error
(** {6 Reduction functions associated to tactics. } *)
(** Evaluable global reference *)
val is_evaluable : Environ.env -> Evaluable.t -> bool
exception NotEvaluableRef of GlobRef.t
val error_not_evaluable : ?loc:Loc.t -> GlobRef.t -> 'a
val evaluable_of_global_reference :
Environ.env -> GlobRef.t -> Evaluable.t
(** Fails on opaque constants and variables
(both those without bodies and those marked Opaque in the conversion oracle). *)
val soft_evaluable_of_global_reference :
?loc:Loc.t -> GlobRef.t -> Evaluable.t
(** Succeeds for any constant or variable even if marked opaque or otherwise not evaluable. *)
val global_of_evaluable_reference :
Evaluable.t -> GlobRef.t
(** Red (returns None if nothing reducible) *)
val red_product : env -> evar_map -> constr -> constr option
(** Simpl *)
val simpl : reduction_function
(** Simpl only at the head *)
val whd_simpl : reduction_function
(** Hnf: like whd_simpl but force delta-reduction of constants that do
not immediately hide a non reducible fix or cofix *)
val hnf_constr : reduction_function
(** Variant of the above that does not perform nf-βι *)
val hnf_constr0 : reduction_function
(** Unfold *)
val unfoldn :
(occurrences * Evaluable.t) list -> reduction_function
(** Fold *)
val fold_commands : constr list -> reduction_function
(** Pattern *)
val pattern_occs : (occurrences * constr) list -> e_reduction_function
(** Rem: Lazy strategies are defined in Reduction *)
(** Call by value strategy (uses Closures) *)
val cbv_norm_flags : RedFlags.reds -> strong:bool -> reduction_function
val cbv_beta : reduction_function
val cbv_betaiota : reduction_function
val cbv_betadeltaiota : reduction_function
val whd_compute : reduction_function
val compute : reduction_function (** = [cbv_betadeltaiota] *)
(** [reduce_to_atomic_ind env sigma t] puts [t] in the form [t'=(I args)]
with [I] an inductive definition;
returns [I] and [t'] or fails with a user error *)
val reduce_to_atomic_ind : env -> evar_map -> types -> (inductive * EInstance.t) * types
(** [reduce_to_quantified_ind env sigma t] puts [t] in the form
[t'=(x1:A1)..(xn:An)(I args)] with [I] an inductive definition;
returns [I] and [t'] or fails with a user error *)
val reduce_to_quantified_ind : env -> evar_map -> types -> (inductive * EInstance.t) * types
(** Same as {!reduce_to_quantified_ind} but more efficient because it does not
return the normalized type. *)
val eval_to_quantified_ind : env -> evar_map -> types -> (inductive * EInstance.t)
(** [reduce_to_quantified_ref env sigma ref t] try to put [t] in the form
[t'=(x1:A1)..(xn:An)(ref args)]. When this is not possible, if [allow_failure]
is specified, [t] is unfolded until the point where this impossibility is plainly
visible. Otherwise, it fails with user error. *)
val reduce_to_quantified_ref :
?allow_failure:bool -> env -> evar_map -> GlobRef.t -> types -> types
val reduce_to_atomic_ref :
?allow_failure:bool -> env -> evar_map -> GlobRef.t -> types -> types
val find_hnf_rectype :
env -> evar_map -> types -> (inductive * EInstance.t) * constr list
val contextually : bool -> occurrences * constr_pattern ->
(patvar_map -> reduction_function) -> reduction_function
val e_contextually : bool -> occurrences * constr_pattern ->
(patvar_map -> e_reduction_function) -> e_reduction_function
(** Errors if the inductive is not allowed for pattern-matching. **)
val check_privacy : env -> inductive -> unit
|
