From bc8ecae8a0dd9f77337b9f3e2e8ffa192d6177ef Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@gmail.com>
Date: Mon, 2 Mar 2020 18:53:20 -0800
Subject: [PATCH] minor

---
 src/pvxs/data.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pvxs/data.h b/src/pvxs/data.h
index 84c425f..dfe01d2 100644
--- a/src/pvxs/data.h
+++ b/src/pvxs/data.h
@@ -458,7 +458,7 @@ public:
     //! If possible, this value is cast to T and passed as the only argument
     //! of the provided function.
     template<typename T, typename FN>
-    void as(FN&& fn) {
+    void as(FN&& fn) const {
         typedef impl::StorageMap<typename std::decay<T>::type> map_t;
         typename map_t::store_t val;
         if(tryCopyOut(&val, map_t::code)) {