add boost on mac

macx64/include/boost/test/data/monomorphic/sample_merge.hpp

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+//  (C) Copyright Gennadiy Rozental 2001.
+//  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)
+
+//  See http://www.boost.org/libs/test for the library home page.
+//
+/// @file
+/// Defines helper routines and types for merging monomorphic samples
+// ***************************************************************************
+
+#ifndef BOOST_TEST_DATA_MONOMORPHIC_SAMPLE_MERGE_HPP
+#define BOOST_TEST_DATA_MONOMORPHIC_SAMPLE_MERGE_HPP
+
+// Boost.Test
+#include <boost/test/data/config.hpp>
+#include <boost/test/data/index_sequence.hpp>
+
+#include <boost/test/data/monomorphic/fwd.hpp>
+
+#include <boost/test/detail/suppress_warnings.hpp>
+
+namespace boost {
+namespace unit_test {
+namespace data {
+namespace monomorphic {
+
+//____________________________________________________________________________//
+
+namespace ds_detail {
+
+template <class T>
+struct is_tuple : std::false_type {};
+
+template <class ...T>
+struct is_tuple<std::tuple<T...>> : std::true_type {};
+
+template <class T>
+struct is_tuple<T&&> : is_tuple<typename std::decay<T>::type> {};
+
+template <class T>
+struct is_tuple<T&> : is_tuple<typename std::decay<T>::type> {};
+
+template<typename T>
+inline auto as_tuple_impl_xvalues( T const & arg, std::false_type  /* is_rvalue_ref */ )
+  -> decltype(std::tuple<T const&>(arg)) {
+    //return std::tuple<T const&>(arg);
+    return std::forward_as_tuple(arg);
+}
+
+template<typename T>
+inline auto as_tuple_impl_xvalues( T && arg, std::true_type  /* is_rvalue_ref */ )
+  -> decltype(std::make_tuple(std::forward<T>(arg))) {
+    return std::make_tuple(std::forward<T>(arg));
+}
+
+
+template<typename T>
+inline auto as_tuple_impl( T && arg, std::false_type  /* is_tuple = nullptr */ )
+  -> decltype(as_tuple_impl_xvalues(std::forward<T>(arg),
+              typename std::is_rvalue_reference<T&&>::type())) {
+    return as_tuple_impl_xvalues(std::forward<T>(arg),
+                                 typename std::is_rvalue_reference<T&&>::type());
+}
+
+//____________________________________________________________________________//
+
+template<typename T>
+inline T &&
+as_tuple_impl(T && arg, std::true_type  /* is_tuple */ ) {
+    return std::forward<T>(arg);
+}
+
+template<typename T>
+inline auto as_tuple( T && arg )
+  -> decltype( as_tuple_impl(std::forward<T>(arg),
+                             typename ds_detail::is_tuple<T>::type()) ) {
+  return as_tuple_impl(std::forward<T>(arg),
+                       typename ds_detail::is_tuple<T>::type());
+}
+
+//____________________________________________________________________________//
+
+} // namespace ds_detail
+
+template<typename T1, typename T2>
+inline auto
+sample_merge( T1 && a1, T2 && a2 )
+    -> decltype( std::tuple_cat(ds_detail::as_tuple(std::forward<T1>(a1)),
+                                ds_detail::as_tuple(std::forward<T2>(a2)) ) ) {
+    return std::tuple_cat(ds_detail::as_tuple(std::forward<T1>(a1)),
+                          ds_detail::as_tuple(std::forward<T2>(a2)));
+}
+
+} // namespace monomorphic
+} // namespace data
+} // namespace unit_test
+} // namespace boost
+
+#include <boost/test/detail/enable_warnings.hpp>
+
+#endif // BOOST_TEST_DATA_MONOMORPHIC_SAMPLE_MERGE_HPP
+