From 7cfc4e5146be5666419451bdd516f1f3f264d24a Mon Sep 17 00:00:00 2001
From: Enrico Tassi <gareuselesinge@debian.org>
Date: Sun, 25 Jan 2015 14:42:51 +0100
Subject: Imported Upstream version 8.5~beta1+dfsg

---
 pretyping/constr_matching.mli | 85 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 pretyping/constr_matching.mli

(limited to 'pretyping/constr_matching.mli')

diff --git a/pretyping/constr_matching.mli b/pretyping/constr_matching.mli
new file mode 100644
index 00000000..67854a89
--- /dev/null
+++ b/pretyping/constr_matching.mli
@@ -0,0 +1,85 @@
+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2015     *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(** This module implements pattern-matching on terms *)
+
+open Names
+open Term
+open Environ
+open Pattern
+
+(** [PatternMatchingFailure] is the exception raised when pattern
+  matching fails *)
+exception PatternMatchingFailure
+
+(** [special_meta] is the default name of the meta holding the
+   surrounding context in subterm matching *)
+val special_meta : metavariable
+
+(** [bound_ident_map] represents the result of matching binding
+   identifiers of the pattern with the binding identifiers of the term
+   matched *)
+type bound_ident_map = Id.t Id.Map.t
+
+(** [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 : env -> Evd.evar_map -> constr_pattern -> constr -> patvar_map
+
+(** [matches_head pat c] does the same as [matches pat c] but accepts
+    [pat] to match an applicative prefix of [c] *)
+val matches_head : env -> Evd.evar_map -> constr_pattern -> constr -> patvar_map
+
+(** [extended_matches pat c] also returns the names of bound variables
+   in [c] that matches the bound variables in [pat]; if several bound
+   variables or metavariables have the same name, the metavariable,
+   or else the rightmost bound variable, takes precedence *)
+val extended_matches :
+  env -> Evd.evar_map -> constr_pattern -> constr -> bound_ident_map * extended_patvar_map
+
+(** [is_matching pat c] just tells if [c] matches against [pat] *)
+val is_matching : env -> Evd.evar_map -> constr_pattern -> constr -> bool
+
+(** [is_matching_head pat c] just tells if [c] or an applicative
+    prefix of it matches against [pat] *)
+val is_matching_head : env -> Evd.evar_map -> 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
+
+(** The type of subterm matching results: a substitution + a context
+   (whose hole is denoted here with [special_meta]) *)
+type matching_result =
+    { m_sub : bound_ident_map * patvar_map;
+      m_ctx : constr }
+
+(** [match_subterm n pat c] returns the substitution and the context
+   corresponding to each **closed** subterm of [c] matching [pat]. *)
+val match_subterm : env -> Evd.evar_map -> constr_pattern -> constr -> matching_result IStream.t
+
+(** [match_appsubterm pat c] returns the substitution and the context
+   corresponding to each **closed** subterm of [c] matching [pat],
+   considering application contexts as well. *)
+val match_appsubterm : env -> Evd.evar_map -> constr_pattern -> constr -> matching_result IStream.t
+
+(** [match_subterm_gen] calls either [match_subterm] or [match_appsubterm] *)
+val match_subterm_gen : env -> Evd.evar_map -> bool (** true = with app context *) ->
+   constr_pattern -> constr -> matching_result IStream.t
+
+(** [is_matching_appsubterm pat c] tells if a subterm of [c] matches
+   against [pat] taking partial subterms into consideration *)
+val is_matching_appsubterm : ?closed:bool -> env -> Evd.evar_map -> constr_pattern -> constr -> bool
+
+(** [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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