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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 *)
(************************************************************************)
(*i $Id: pattern.mli 13323 2010-07-24 15:57:30Z herbelin $ i*)
(*i*)
open Pp
open Names
open Sign
open Term
open Environ
open Libnames
open Nametab
open Rawterm
open Mod_subst
(*i*)
(* Types of substitutions with or w/o bound variables *)
type constr_under_binders = identifier list * constr
type patvar_map = (patvar * constr) list
type extended_patvar_map = (patvar * constr_under_binders) list
(* Patterns *)
type constr_pattern =
| PRef of global_reference
| PVar of identifier
| PEvar of existential_key * constr_pattern array
| PRel of int
| PApp of constr_pattern * constr_pattern array
| PSoApp of patvar * constr_pattern list
| PLambda of name * constr_pattern * constr_pattern
| PProd of name * constr_pattern * constr_pattern
| PLetIn of name * constr_pattern * constr_pattern
| PSort of rawsort
| PMeta of patvar option
| PIf of constr_pattern * constr_pattern * constr_pattern
| PCase of (case_style * int array * inductive option * (int * int) option)
* constr_pattern * constr_pattern * constr_pattern array
| PFix of fixpoint
| PCoFix of cofixpoint
(** {5 Functions on patterns} *)
val occur_meta_pattern : constr_pattern -> bool
val subst_pattern : substitution -> constr_pattern -> constr_pattern
exception BoundPattern
(* [head_pattern_bound t] extracts the head variable/constant of the
type [t] or raises [BoundPattern] (even if a sort); it raises an anomaly
if [t] is an abstraction *)
val head_pattern_bound : constr_pattern -> global_reference
(* [head_of_constr_reference c] assumes [r] denotes a reference and
returns its label; raises an anomaly otherwise *)
val head_of_constr_reference : Term.constr -> global_reference
(* [pattern_of_constr c] translates a term [c] with metavariables into
a pattern; currently, no destructor (Cases, Fix, Cofix) and no
existential variable are allowed in [c] *)
val pattern_of_constr : Evd.evar_map -> constr -> named_context * constr_pattern
(* [pattern_of_rawconstr l c] translates a term [c] with metavariables into
a pattern; variables bound in [l] are replaced by the pattern to which they
are bound *)
val pattern_of_rawconstr : rawconstr ->
patvar list * constr_pattern
val instantiate_pattern :
Evd.evar_map -> (identifier * (identifier list * constr)) list ->
constr_pattern -> constr_pattern
val lift_pattern : int -> constr_pattern -> constr_pattern
|
