| 1 | // Boost.Units - A C++ library for zero-overhead dimensional analysis and |
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| 2 | // unit/quantity manipulation and conversion |
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| 3 | // |
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| 4 | // Copyright (C) 2003-2008 Matthias Christian Schabel |
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| 5 | // Copyright (C) 2008 Steven Watanabe |
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| 6 | // |
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| 7 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 8 | // accompanying file LICENSE_1_0.txt or copy at |
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| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 10 | |
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| 11 | #ifndef BOOST_UNITS_DETAIL_PUSH_FRONT_IF_HPP |
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| 12 | #define BOOST_UNITS_DETAIL_PUSH_FRONT_IF_HPP |
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| 13 | |
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| 14 | namespace boost { |
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| 15 | |
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| 16 | namespace units { |
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| 17 | |
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| 18 | template<class T, class Next> |
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| 19 | struct list; |
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| 20 | |
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| 21 | namespace detail { |
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| 22 | |
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| 23 | template<bool> |
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| 24 | struct push_front_if; |
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| 25 | |
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| 26 | template<> |
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| 27 | struct push_front_if<true> { |
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| 28 | template<class L, class T> |
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| 29 | struct apply { |
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| 30 | typedef list<T, L> type; |
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| 31 | }; |
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| 32 | }; |
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| 33 | |
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| 34 | template<> |
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| 35 | struct push_front_if<false> { |
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| 36 | template<class L, class T> |
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| 37 | struct apply { |
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| 38 | typedef L type; |
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| 39 | }; |
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| 40 | }; |
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| 41 | |
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| 42 | } |
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| 43 | |
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| 44 | } |
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| 45 | |
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| 46 | } |
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| 47 | |
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| 48 | #endif |
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| 49 | |
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