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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Names
open Libnames
open Decl_kinds
open Term
open Sign
open Evd
open Environ
open Nametab
open Mod_subst
open Topconstr
open Util
type direction = Forward | Backward
(** This module defines type-classes *)
type typeclass = {
(** The class implementation: a record parameterized by the context with defs in it or a definition if
the class is a singleton. This acts as the class' global identifier. *)
cl_impl : global_reference;
(** Context in which the definitions are typed. Includes both typeclass parameters and superclasses.
The boolean indicates if the typeclass argument is a direct superclass and the global reference
gives a direct link to the class itself. *)
cl_context : (global_reference * bool) option list * rel_context;
(** Context of definitions and properties on defs, will not be shared *)
cl_props : rel_context;
(** The methods implementations of the typeclass as projections.
Some may be undefinable due to sorting restrictions or simply undefined if
no name is provided. The [int option option] indicates subclasses whose hint has
the given priority. *)
cl_projs : (name * (direction * int option) option * constant option) list;
}
type instance
val instances : global_reference -> instance list
val typeclasses : unit -> typeclass list
val all_instances : unit -> instance list
val add_class : typeclass -> unit
val add_constant_class : constant -> unit
val add_inductive_class : inductive -> unit
val new_instance : typeclass -> int option -> bool -> global_reference -> instance
val add_instance : instance -> unit
val remove_instance : instance -> unit
val class_info : global_reference -> typeclass (** raises a UserError if not a class *)
(** These raise a UserError if not a class. *)
val dest_class_app : env -> constr -> typeclass * constr list
(** Just return None if not a class *)
val class_of_constr : constr -> (rel_context * (typeclass * constr list)) option
val instance_impl : instance -> global_reference
val is_class : global_reference -> bool
val is_instance : global_reference -> bool
val is_implicit_arg : hole_kind -> bool
(** Returns the term and type for the given instance of the parameters and fields
of the type class. *)
val instance_constructor : typeclass -> constr list -> constr option * types
(** Resolvability.
Only undefined evars could be marked or checked for resolvability. *)
val is_resolvable : evar_info -> bool
val mark_unresolvable : evar_info -> evar_info
val mark_unresolvables : evar_map -> evar_map
val is_class_evar : evar_map -> evar_info -> bool
val resolve_typeclasses : ?onlyargs:bool -> ?split:bool -> ?fail:bool ->
env -> evar_map -> evar_map
val resolve_one_typeclass : env -> evar_map -> types -> open_constr
val register_set_typeclass_transparency : (evaluable_global_reference -> bool (*local?*) -> bool -> unit) -> unit
val set_typeclass_transparency : evaluable_global_reference -> bool -> bool -> unit
val register_classes_transparent_state : (unit -> transparent_state) -> unit
val classes_transparent_state : unit -> transparent_state
val register_add_instance_hint : (constr -> bool (* local? *) -> int option -> unit) -> unit
val register_remove_instance_hint : (global_reference -> unit) -> unit
val add_instance_hint : constr -> bool -> int option -> unit
val remove_instance_hint : global_reference -> unit
val solve_instanciations_problem : (env -> evar_map -> bool -> bool -> bool -> evar_map) ref
val solve_instanciation_problem : (env -> evar_map -> types -> open_constr) ref
val declare_instance : int option -> bool -> global_reference -> unit
(** Build the subinstances hints for a given typeclass object.
check tells if we should check for existence of the
subinstances and add only the missing ones. *)
val build_subclasses : check:bool -> env -> evar_map -> global_reference -> int option (* priority *) ->
(int option * constr) list
|
