Imported Upstream version 1.49.0upstream/1.49.0

1 files changed, 48 insertions, 0 deletions

diff --git a/boost/units/detail/push_front_if.hpp b/boost/units/detail/push_front_if.hpp
new file mode 100644
index 0000000000..b924a24c6b
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+++ b/boost/units/detail/push_front_if.hpp
@@ -0,0 +1,48 @@
+// 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