Initial version of std::array for Boost.Fusion

Functional, though ADL issues have not been solved (see README).

libs/fusion/test/Jamfile

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+##==============================================================================
+#    Copyright (c) 2013 Mateusz Loskot
+#    Copyright (c) 2003-2006 Joel de Guzman
+#
+#   Use, modification and distribution is subject to the Boost Software
+#   License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+#   http://www.boost.org/LICENSE_1_0.txt)
+#==============================================================================
+# bring in rules for testing
+import testing ;
+
+project
+    : requirements
+    ;
+
+{
+    test-suite fusion_std_array :
+
+    [ run sequence/std_array.cpp :  :  :  : ]
+
+    ;
+}

libs/fusion/test/sequence/CMakeLists.txt

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+cmake_minimum_required (VERSION 2.8)
+project(boost_fusion_std_array)
+
+if(MSVC)
+  list(APPEND CMAKE_CXX_FLAGS /Za)
+else()
+list(APPEND CMAKE_CXX_FLAGS -pedantic -Wall)
+if(CMAKE_COMPILER_IS_GNUCXX)
+  list(APPEND CMAKE_CXX_FLAGS -std=c++0x)
+elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER}" MATCHES "clang")
+  list(APPEND CMAKE_CXX_FLAGS -std=c++11)
+endif()
+endif()
+
+string(REPLACE ";" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+
+find_package(Boost 1.54)
+if (NOT Boost_FOUND)
+  message(FATAL_ERROR "Cannot find Boost")
+endif()
+include_directories(${Boost_INCLUDE_DIRS})
+
+add_executable(std_array std_array.cpp)

libs/fusion/test/sequence/std_array.cpp

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+//
+// Copyright (C) 2013 Mateusz Loskot <mateusz@loskot.net>
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy 
+// at http://www.boost.org/LICENSE_1_0.txt)
+//
+#pragma warning(disable:4180)
+#include <boost/detail/lightweight_test.hpp>
+
+#include <boost/fusion/adapted/std_array.hpp>
+#include <array>
+
+#include <boost/fusion/sequence/intrinsic.hpp>
+#include <boost/fusion/support/is_sequence.hpp>
+#include <boost/fusion/support/is_view.hpp>
+#include <boost/fusion/iterator.hpp>
+
+#include <boost/mpl/assert.hpp>
+
+int main()
+{
+    using namespace boost::fusion;
+    typedef std::array<int,3> array_type;
+
+
+    BOOST_MPL_ASSERT((traits::is_sequence<array_type>));
+    BOOST_MPL_ASSERT_NOT((traits::is_view<array_type>));
+
+    array_type arr = {{1,2,3}};
+
+    BOOST_TEST(*boost::fusion::begin(arr) == 1);
+    BOOST_TEST(*boost::fusion::next(boost::fusion::begin(arr)) == 2);
+    BOOST_TEST(*advance_c<2>(boost::fusion::begin(arr)) == 3);
+    BOOST_TEST(prior(boost::fusion::next(boost::fusion::begin(arr))) == boost::fusion::begin(arr));
+    BOOST_TEST(*prior(boost::fusion::end(arr)) == 3);
+    BOOST_TEST(at_c<2>(arr) == 3);
+    BOOST_TEST(size(arr) == 3);
+    BOOST_TEST(distance(boost::fusion::begin(arr), boost::fusion::end(arr)) == 3);
+
+    return boost::report_errors();
+}