From 6bac888419048aa8fe06b49bf94f64893228bb00 Mon Sep 17 00:00:00 2001
From: gareuselesinge
Date: Thu, 8 Aug 2013 18:50:39 +0000
Subject: Searchable stack data structure

It is like Stack but one can search without popping

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16670 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 lib/searchstack.mli | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 lib/searchstack.mli

(limited to 'lib/searchstack.mli')

diff --git a/lib/searchstack.mli b/lib/searchstack.mli
new file mode 100644
index 0000000000..6c81a2a9c9
--- /dev/null
+++ b/lib/searchstack.mli
@@ -0,0 +1,25 @@
+(************************************************************************)
+(*  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        *)
+(************************************************************************)
+
+type 'a t
+type ('a,'b) search = [ `Stop of 'b | `Cont of 'a ]
+
+val create : unit -> 'a t
+val push : 'a -> 'a t -> unit
+val find : ('c -> 'a -> ('c, 'b) search) -> 'c -> 'a t -> 'b
+val is_empty : 'a t -> bool
+val iter : ('a -> unit) -> 'a t -> unit
+val clear : 'a t -> unit
+val length : 'a t -> int
+
+(* may raise Stack.Empty *)
+val pop  : 'a t -> 'a
+val top  : 'a t -> 'a
+
+(* Extra *)
+val to_list : 'a t -> 'a list
-- 
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