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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: matching.mli 6616 2005-01-21 17:18:23Z herbelin $ i*)
(*i*)
open Names
open Term
open Environ
open Pattern
open Termops
(*i*)
(*s This modules implements pattern-matching on terms *)
exception PatternMatchingFailure
val special_meta : metavariable
(* [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 -> patvar_map
(* [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 -> patvar_map
(* [match_subterm n pat c] returns the substitution and the context
corresponding to the [n+1]th **closed** subterm of [c] matching [pat];
It raises PatternMatchingFailure if no such matching exists *)
val match_subterm : int -> constr_pattern -> constr -> patvar_map * 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
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