From d6b80da18b9177052cd8e1b380b674541e95e628 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 3 Dec 2018 15:29:04 +1100
Subject: [PATCH] cast: add sanity cast

---
 cast.hpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/cast.hpp b/cast.hpp
index 2ecf291c..86ead4c2 100644
--- a/cast.hpp
+++ b/cast.hpp
@@ -184,4 +184,17 @@ namespace cruft::cast {
         return reinterpret_cast<DstT> (src);
 #pragma GCC diagnostic pop
     }
+
+
+    ///////////////////////////////////////////////////////////////////////////
+    /// Cast from SrcT to DstT, performing sanity checks on the src and dst
+    /// values before returning the result.
+    template <typename DstT, typename SrcT>
+    DstT sanity (SrcT src)
+    {
+        cruft::debug::sanity (src);
+        DstT dst = static_cast<DstT> (src);
+        cruft::debug::sanity (dst);
+        return dst;
+    }
 }