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+// Boost.Units - A C++ library for zero-overhead dimensional analysis and
+// unit/quantity manipulation and conversion
+//
+// Copyright (C) 2003-2008 Matthias Christian Schabel
+// Copyright (C) 2008 Steven Watanabe
+//
+// 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)
+
+#ifndef BOOST_UNITS_DETAIL_PUSH_FRONT_IF_HPP
+#define BOOST_UNITS_DETAIL_PUSH_FRONT_IF_HPP
+
+namespace boost {
+
+namespace units {
+
+template<class T, class Next>
+struct list;
+
+namespace detail {
+
+template<bool>
+struct push_front_if;
+
+template<>
+struct push_front_if<true> {
+ template<class L, class T>
+ struct apply {
+ typedef list<T, L> type;
+ };
+};
+
+template<>
+struct push_front_if<false> {
+ template<class L, class T>
+ struct apply {
+ typedef L type;
+ };
+};
+
+}
+
+}
+
+}
+
+#endif