From db4f09628f6f4f8ff7f532d2b64998ab549008d5 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Thu, 1 Feb 2018 13:48:03 +1100
Subject: [PATCH] view: add make_byte_view convenience method.

---
 view.hpp | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/view.hpp b/view.hpp
index 6f780c6a..08690431 100644
--- a/view.hpp
+++ b/view.hpp
@@ -583,6 +583,44 @@ namespace util {
     make_view (std::basic_string<CharT,TraitsT,AllocT>&&) = delete;
 
 
+    ///////////////////////////////////////////////////////////////////////////
+    // calculates a byte oriented view over an arbitrary type
+    //
+    // useful for passing in memory structures to file descriptors and the
+    // like. but the consequences of endian conversion is on the user...
+    template <typename T>
+    view<std::byte*>
+    make_byte_view (T &t)
+    {
+        auto first = reinterpret_cast<std::byte*> (&t);
+        auto last  = first + sizeof (t);
+        return { first, last };
+    }
+
+
+    //-------------------------------------------------------------------------
+    template <typename T>
+    view<std::byte*>
+    make_byte_view (T&&) = delete;
+
+
+    //-------------------------------------------------------------------------
+    template <typename T>
+    view<const std::byte*>
+    make_byte_view (const T &t)
+    {
+        auto first = reinterpret_cast<std::byte*> (&t);
+        auto last  = first + sizeof (t);
+        return { first, last };
+    }
+
+
+    //-------------------------------------------------------------------------
+    template <typename T>
+    view<const std::byte*>
+    make_byte_view (const T &&t) = delete;
+
+
     ///////////////////////////////////////////////////////////////////////////
     template <
         typename BeginA, typename EndA,