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2 #ifndef BOOST_MPL_PRINT_HPP_INCLUDED
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3 #define BOOST_MPL_PRINT_HPP_INCLUDED
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4
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5 // Copyright David Abrahams 2003
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6 // Copyright Aleksey Gurtovoy 2004
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7 //
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8 // Distributed under the Boost Software License, Version 1.0.
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9 // (See accompanying file LICENSE_1_0.txt or copy at
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10 // http://www.boost.org/LICENSE_1_0.txt)
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11 //
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12 // See http://www.boost.org/libs/mpl for documentation.
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13
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14 // $Id$
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15 // $Date$
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16 // $Revision$
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17
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18 #include <boost/mpl/aux_/config/msvc.hpp>
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19 #include <boost/mpl/identity.hpp>
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20
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21 namespace boost { namespace mpl {
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22
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23 namespace aux {
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24 #if defined(BOOST_MSVC)
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25 # pragma warning(push, 3)
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26 // we only want one warning from MSVC, so turn off the other one
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27 # pragma warning(disable: 4307)
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28 #elif defined(__MWERKS__)
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29 # pragma warn_hidevirtual on
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30 struct print_base { virtual void f() {} };
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31 #endif
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32
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33 #if defined(__EDG_VERSION__)
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34 template <class T>
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35 struct dependent_unsigned
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36 {
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37 static const unsigned value = 1;
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38 };
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39 #endif
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40 } // namespace aux
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41
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42 template <class T>
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43 struct print
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44 : mpl::identity<T>
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45 #if defined(__MWERKS__)
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46 , aux::print_base
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47 #endif
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48 {
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49 #if defined(__clang__)
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50 const int m_x = 1 / (sizeof(T) - sizeof(T));
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51 #elif defined(BOOST_MSVC)
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52 enum { n = sizeof(T) + -1 };
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53 #elif defined(__MWERKS__)
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54 void f(int);
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55 #else
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56 enum {
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57 n =
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58 # if defined(__EDG_VERSION__)
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59 aux::dependent_unsigned<T>::value > -1
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60 # else
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61 sizeof(T) > -1
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62 # endif
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63 };
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64 #endif
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65 };
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66
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67 #if defined(BOOST_MSVC)
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68 # pragma warning(pop)
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69 #elif defined(__MWERKS__)
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70 # pragma warn_hidevirtual reset
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71 #endif
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72
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73 }}
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74
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75 #endif // BOOST_MPL_PRINT_HPP_INCLUDED
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