From 64e5394540dbb6b0a88124be96572b97e09f8f33 Mon Sep 17 00:00:00 2001
From: Marshall Clow <marshall@idio.com>
Date: Sun, 6 Jun 2010 16:05:13 +0000
Subject: [PATCH] Added get_c_array to Boost.Array

[SVN r62487]
---
 include/boost/array.hpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/include/boost/array.hpp b/include/boost/array.hpp
index b14a148..5925636 100644
--- a/include/boost/array.hpp
+++ b/include/boost/array.hpp
@@ -346,6 +346,38 @@ namespace boost {
         x.swap(y);
     }
 
+	// Specific for boost::array: simply returns its elems data member.
+	template <typename T, std::size_t N>
+	T(&get_c_array(boost::array<T,N>& arg))[N]
+	{
+		return arg.elems;
+	}
+	
+	// Const version.
+	template <typename T, std::size_t N>
+	const T(&get_c_array(const boost::array<T,N>& arg))[N]
+	{
+		return arg.elems;
+	}
+
+#if 0
+	// Overload for std::array, assuming that std::array will have
+	// explicit conversion functions as discussed at the WG21 meeting
+	// in Summit, March 2009.
+	template <typename T, std::size_t N>
+	T(&get_c_array(std::array<T,N>& arg))[N]
+	{
+		return static_cast<T(&)[N]>(arg);
+	}
+	
+	// Const version.
+	template <typename T, std::size_t N>
+	const T(&get_c_array(const std::array<T,N>& arg))[N]
+	{
+		return static_cast<T(&)[N]>(arg);
+	}
+#endif
+
 } /* namespace boost */