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(***********************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA-Rocquencourt & LRI-CNRS-Orsay *)
(* \VV/ *************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(***********************************************************************)
(*i $Id$ i*)
(*i*)
open Names
open Sign
open Term
open Environ
open Nametab
(*i*)
type constr_pattern =
| PRef of global_reference
| PVar of identifier
| PEvar of existential_key
| PRel of int
| PApp of constr_pattern * constr_pattern array
| PSoApp of int * 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 Rawterm.rawsort
| PMeta of int option
| PCase of constr_pattern option * constr_pattern * constr_pattern array
| PFix of fixpoint
| PCoFix of cofixpoint
val occur_meta_pattern : constr_pattern -> bool
type constr_label =
| ConstNode of constant
| IndNode of inductive
| CstrNode of constructor
| VarNode of identifier
val label_of_ref : global_reference -> constr_label
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 -> constr_label
(* [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 -> constr_label
(* [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 : constr -> constr_pattern
exception PatternMatchingFailure
(* [matches pat c] matches [c] against [pat] and returns the resulting
assignment of metavariables; it raises [PatternMatchingFailure] if
not matchable; bindings are given in increasing order based on the
numbers given in the pattern *)
val matches :
constr_pattern -> constr -> (int * constr) list
(* [is_matching pat c] just tells if [c] matches against [pat] *)
val is_matching :
constr_pattern -> constr -> bool
(* [matches_conv env sigma] matches up to conversion in environment
[(env,sigma)] when constants in pattern are concerned; it raises
[PatternMatchingFailure] if not matchable; bindings are given in
increasing order based on the numbers given in the pattern *)
val matches_conv :
env -> Evd.evar_map -> constr_pattern -> constr -> (int * constr) list
(* To skip to the next occurrence *)
exception NextOccurrence of int
(* Tries to match a subterm of [c] with [pat] *)
val sub_match :
int -> constr_pattern -> constr -> ((int * constr) list * constr)
(* [is_matching_conv env sigma pat c] tells if [c] matches against [pat]
up to conversion for constants in patterns *)
val is_matching_conv :
env -> Evd.evar_map -> constr_pattern -> constr -> bool
|
