From 179c8bead451a6a7e9df169758b7a77aa1f469c2 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Thu, 4 Oct 2018 17:57:17 +1000
Subject: [PATCH] alloc/arena: add inner allocator accessor

---
 alloc/arena.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/alloc/arena.hpp b/alloc/arena.hpp
index 0a96b2f7..02f41f64 100644
--- a/alloc/arena.hpp
+++ b/alloc/arena.hpp
@@ -128,6 +128,12 @@ namespace cruft::alloc {
         decltype(auto) reset (Args&&...args)
         { return m_store.reset (std::forward<Args> (args)...); }
 
+        /// Returns a const reference to the inner allocator.
+        ///
+        /// Do not return a non-const reference. If the user wants direct
+        /// access they should directly use a non-owning arena.
+        auto const& store (void) const& { return m_store; }
+
     private:
         AllocT m_store;
         arena<AllocT> m_arena;