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1 // Boost.Geometry
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2
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3 // Copyright (c) 2015 Oracle and/or its affiliates.
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4
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5 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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6
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7 // Use, modification and distribution is subject to the Boost Software License,
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8 // Version 1.0. (See 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_GEOMETRY_UTIL_CONDITION_HPP
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12 #define BOOST_GEOMETRY_UTIL_CONDITION_HPP
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13
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14
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15 #include <boost/config.hpp>
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16
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17
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18 // The macro defined in this file allows to suppress the MSVC
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19 // compiler warning C4127: conditional expression is constant
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20
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21 #ifdef BOOST_MSVC
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22
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23 // NOTE: The code commented out below contains an alternative implementation
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24 // of a macro using a free function. It was left here in case if in the future
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25 // version of MSVC for the code currently used in the macro implementation
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26 // the warning was generated.
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27
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28 //#ifndef DOXYGEN_NO_DETAIL
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29 //namespace boost { namespace geometry { namespace detail {
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30 //BOOST_FORCEINLINE bool condition(bool const b) { return b; }
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31 //}}} // boost::geometry::detail
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32 //#endif // DOXYGEN_NO_DETAIL
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33 //#define BOOST_GEOMETRY_CONDITION(CONDITION) boost::geometry::detail::condition(CONDITION)
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34
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35 #define BOOST_GEOMETRY_CONDITION(CONDITION) ((void)0, (CONDITION))
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36
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37 #else
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38
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39 #define BOOST_GEOMETRY_CONDITION(CONDITION) (CONDITION)
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40
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41 #endif
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42
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43
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44 #endif // BOOST_GEOMETRY_UTIL_CONDITION_HPP
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