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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(*i $Id: coercion.mli 8875 2006-05-29 19:59:11Z msozeau $ i*)
(*i*)
open Util
open Evd
open Names
open Term
open Sign
open Environ
open Evarutil
open Rawterm
(*i*)
module type S = sig
(*s Coercions. *)
(* [inh_app_fun env isevars j] coerces [j] to a function; i.e. it
inserts a coercion into [j], if needed, in such a way it gets as
type a product; it returns [j] if no coercion is applicable *)
val inh_app_fun :
env -> evar_defs -> unsafe_judgment -> evar_defs * unsafe_judgment
(* [inh_coerce_to_sort env isevars j] coerces [j] to a type; i.e. it
inserts a coercion into [j], if needed, in such a way it gets as
type a sort; it fails if no coercion is applicable *)
val inh_coerce_to_sort : loc ->
env -> evar_defs -> unsafe_judgment -> evar_defs * unsafe_type_judgment
(* [inh_coerce_to_base env isevars j] coerces [j] to its base type; i.e. it
inserts a coercion into [j], if needed, in such a way it gets as
type its base type (the notion depends on the coercion system) *)
val inh_coerce_to_base : loc ->
env -> evar_defs -> unsafe_judgment -> evar_defs * unsafe_judgment
(* [inh_conv_coerce_to loc env isevars j t] coerces [j] to an object of type
[t]; i.e. it inserts a coercion into [j], if needed, in such a way [t] and
[j.uj_type] are convertible; it fails if no coercion is applicable *)
val inh_conv_coerce_to : loc ->
env -> evar_defs -> unsafe_judgment -> type_constraint_type -> evar_defs * unsafe_judgment
(* [inh_conv_coerces_to loc env isevars t t'] checks if an object of type [t]
is coercible to an object of type [t'] adding evar constraints if needed;
it fails if no coercion exists *)
val inh_conv_coerces_to : loc ->
env -> evar_defs -> types -> type_constraint_type -> evar_defs
(* [inh_pattern_coerce_to loc env isevars pat ind1 ind2] coerces the Cases
pattern [pat] typed in [ind1] into a pattern typed in [ind2];
raises [Not_found] if no coercion found *)
val inh_pattern_coerce_to :
loc -> cases_pattern -> inductive -> inductive -> cases_pattern
end
module Default : S
|
