From 6f14c7c65b5cc5341d480faad8fd63b9431ec9ab Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 30 Jan 2018 16:25:48 +1100
Subject: [PATCH] view: allow implicit conversion from const*const* to const**

---
 view.hpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/view.hpp b/view.hpp
index abc81b06..85c1fb59 100644
--- a/view.hpp
+++ b/view.hpp
@@ -79,6 +79,20 @@ namespace util {
         { ; }
 
 
+        //---------------------------------------------------------------------
+        // implicit conversion from const pointer const views to const pointer views
+        template <
+            typename ValueT,
+            typename = std::enable_if_t<
+                std::is_same_v<BeginT, const ValueT**> &&
+                std::is_same_v<EndT,   const ValueT**>
+            >
+        >
+        view (const view<const ValueT*const*,const ValueT*const*> &rhs):
+            m_begin (const_cast<const ValueT**> (rhs.begin ())),
+            m_end   (const_cast<const ValueT**> (rhs.end   ()))
+        { ; }
+
         //---------------------------------------------------------------------
         // implicit conversion from pointer views to const pointer views
         template <