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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 Pp
open Util
open Names
open Glob_term
open Term
open Sign
open Evd
open Environ
open Reductionops
(** {5 This modules provides useful functions for unification modulo evars } *)
(** {6 Metas} *)
(** [new_meta] is a generator of unique meta variables *)
val new_meta : unit -> metavariable
val mk_new_meta : unit -> constr
(** [new_untyped_evar] is a generator of unique evar keys *)
val new_untyped_evar : unit -> existential_key
(** {6 Creating a fresh evar given their type and context} *)
val new_evar :
evar_map -> env -> ?src:Loc.t * Evar_kinds.t -> ?filter:bool list ->
?candidates:constr list -> types -> evar_map * constr
(** the same with side-effects *)
val e_new_evar :
evar_map ref -> env -> ?src:Loc.t * Evar_kinds.t -> ?filter:bool list ->
?candidates:constr list -> types -> constr
(** Create a new Type existential variable, as we keep track of
them during type-checking and unification. *)
val new_type_evar :
?src:Loc.t * Evar_kinds.t -> ?filter:bool list -> evar_map -> env -> evar_map * constr
(** Create a fresh evar in a context different from its definition context:
[new_evar_instance sign evd ty inst] creates a new evar of context
[sign] and type [ty], [inst] is a mapping of the evar context to
the context where the evar should occur. This means that the terms
of [inst] are typed in the occurrence context and their type (seen
as a telescope) is [sign] *)
val new_evar_instance :
named_context_val -> evar_map -> types -> ?src:Loc.t * Evar_kinds.t -> ?filter:bool list -> ?candidates:constr list -> constr list -> evar_map * constr
val make_pure_subst : evar_info -> constr array -> (identifier * constr) list
(** {6 Instantiate evars} *)
type conv_fun =
env -> evar_map -> conv_pb -> constr -> constr -> evar_map * bool
(** [evar_define choose env ev c] try to instantiate [ev] with [c] (typed in [env]),
possibly solving related unification problems, possibly leaving open
some problems that cannot be solved in a unique way (except if choose is
true); fails if the instance is not valid for the given [ev] *)
val evar_define : conv_fun -> ?choose:bool -> env -> evar_map ->
existential -> constr -> evar_map
(** {6 Evars/Metas switching...} *)
(** [evars_to_metas] generates new metavariables for each non dependent
existential and performs the replacement in the given constr; it also
returns the evar_map extended with dependent evars *)
val evars_to_metas : evar_map -> open_constr -> (evar_map * constr)
val non_instantiated : evar_map -> (evar * evar_info) list
(** {6 Unification utils} *)
(** [head_evar c] returns the head evar of [c] if any *)
exception NoHeadEvar
val head_evar : constr -> existential_key (** may raise NoHeadEvar *)
(* Expand head evar if any *)
val whd_head_evar : evar_map -> constr -> constr
val is_ground_term : evar_map -> constr -> bool
val is_ground_env : evar_map -> env -> bool
val solve_refl : ?can_drop:bool -> conv_fun -> env -> evar_map ->
existential_key -> constr array -> constr array -> evar_map
val solve_evar_evar : ?force:bool ->
(env -> evar_map -> existential -> constr -> evar_map) -> conv_fun ->
env -> evar_map -> existential -> existential -> evar_map
val solve_simple_eqn : conv_fun -> ?choose:bool -> env -> evar_map ->
bool option * existential * constr -> evar_map * bool
val reconsider_conv_pbs : conv_fun -> evar_map -> evar_map * bool
(** [check_evars env initial_sigma extended_sigma c] fails if some
new unresolved evar remains in [c] *)
val check_evars : env -> evar_map -> evar_map -> constr -> unit
val define_evar_as_product : evar_map -> existential -> evar_map * types
val define_evar_as_lambda : env -> evar_map -> existential -> evar_map * types
val define_evar_as_sort : evar_map -> existential -> evar_map * sorts
val is_unification_pattern_evar : env -> evar_map -> existential -> constr list ->
constr -> constr list option
val is_unification_pattern : env * int -> evar_map -> constr -> constr list ->
constr -> constr list option
val evar_absorb_arguments : env -> evar_map -> existential -> constr list ->
evar_map * existential
val solve_pattern_eqn : env -> constr list -> constr -> constr
(** The following functions return the set of evars immediately
contained in the object, including defined evars *)
val evars_of_term : constr -> Intset.t
(** returns the evars contained in the term associated with
the evars they contain themselves in their body, if any.
If the evar has no body, [None] is associated to it. *)
val evars_of_evars_of_term : evar_map -> constr -> (Intset.t option) Intmap.t
val evars_of_named_context : named_context -> Intset.t
val evars_of_evar_info : evar_info -> Intset.t
(** returns the evars which can be found in the typing context of the argument evars,
in the same format as {!evars_of_evars_of_term}.
It explores recursively the evars in the body of the argument evars -- but does
not return them. *)
(* spiwack: tongue in cheek: it should have been called
[evars_of_evars_in_types_of_list_and_recursively_in_bodies] *)
val evars_of_evars_in_types_of_list : evar_map -> evar list -> (Intset.t option) Intmap.t
(** The following functions return the set of undefined evars
contained in the object, the defined evars being traversed.
This is roughly a combination of the previous functions and
[nf_evar]. *)
val undefined_evars_of_term : evar_map -> constr -> Intset.t
val undefined_evars_of_named_context : evar_map -> named_context -> Intset.t
val undefined_evars_of_evar_info : evar_map -> evar_info -> Intset.t
(** {6 Value/Type constraints} *)
val judge_of_new_Type : evar_map -> evar_map * unsafe_judgment
type type_constraint = types option
type val_constraint = constr option
val empty_tycon : type_constraint
val mk_tycon : constr -> type_constraint
val empty_valcon : val_constraint
val mk_valcon : constr -> val_constraint
val split_tycon :
Loc.t -> env -> evar_map -> type_constraint ->
evar_map * (name * type_constraint * type_constraint)
val valcon_of_tycon : type_constraint -> val_constraint
val lift_tycon : int -> type_constraint -> type_constraint
(***********************************************************)
(** [flush_and_check_evars] raise [Uninstantiated_evar] if an evar remains
uninstantiated; [nf_evar] leaves uninstantiated evars as is *)
val nf_evar : evar_map -> constr -> constr
val j_nf_evar : evar_map -> unsafe_judgment -> unsafe_judgment
val jl_nf_evar :
evar_map -> unsafe_judgment list -> unsafe_judgment list
val jv_nf_evar :
evar_map -> unsafe_judgment array -> unsafe_judgment array
val tj_nf_evar :
evar_map -> unsafe_type_judgment -> unsafe_type_judgment
val nf_named_context_evar : evar_map -> named_context -> named_context
val nf_rel_context_evar : evar_map -> rel_context -> rel_context
val nf_env_evar : evar_map -> env -> env
val nf_evar_info : evar_map -> evar_info -> evar_info
val nf_evar_map : evar_map -> evar_map
val nf_evar_map_undefined : evar_map -> evar_map
(** Replacing all evars, possibly raising [Uninstantiated_evar] *)
exception Uninstantiated_evar of existential_key
val flush_and_check_evars : evar_map -> constr -> constr
(** Replace the vars and rels that are aliases to other vars and rels by
their representative that is most ancient in the context *)
val expand_vars_in_term : env -> constr -> constr
(** {6 debug pretty-printer:} *)
val pr_tycon : env -> type_constraint -> Pp.std_ppcmds
(** {6 Removing hyps in evars'context}
raise OccurHypInSimpleClause if the removal breaks dependencies *)
type clear_dependency_error =
| OccurHypInSimpleClause of identifier option
| EvarTypingBreak of existential
exception ClearDependencyError of identifier * clear_dependency_error
(* spiwack: marks an evar that has been "defined" by clear.
used by [Goal] and (indirectly) [Proofview] to handle the clear tactic gracefully*)
val cleared : bool Store.Field.t
val clear_hyps_in_evi : evar_map ref -> named_context_val -> types ->
identifier list -> named_context_val * types
val push_rel_context_to_named_context : Environ.env -> types ->
named_context_val * types * constr list * constr list
val generalize_evar_over_rels : evar_map -> existential -> types * constr list
val check_evar_instance : evar_map -> existential_key -> constr -> conv_fun ->
evar_map
|
