From 59c2891c0f3dcbc3721539e9bef068954cddd433 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 4 Apr 2016 16:42:20 +0200
Subject: Add _has_cache() custom session interface, use in OLV implementation

---
 common/session/custom/session.hxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/session/custom/session.hxx b/common/session/custom/session.hxx
index 29fb4a2..3cb7c24 100644
--- a/common/session/custom/session.hxx
+++ b/common/session/custom/session.hxx
@@ -95,6 +95,9 @@ private:
   // Object cache interface.
   //
 public:
+  static bool
+  _has_cache () {return current != 0;}
+
   template <typename T>
   struct cache_position
   {
-- 
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