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1 |
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2 // Copyright Aleksey Gurtovoy 2000-2006 |
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3 // |
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4 // Distributed under the Boost Software License, Version 1.0. |
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5 // (See accompanying file LICENSE_1_0.txt or copy at |
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6 // http://www.boost.org/LICENSE_1_0.txt) |
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7 // |
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8 // See http://www.boost.org/libs/mpl for documentation. |
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9 |
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10 // $Source: /cvsroot/boost/boost/boost/mpl/aux_/integral_wrapper.hpp,v $ |
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11 // $Date: 2006/11/08 21:44:30 $ |
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12 // $Revision: 1.10.14.1 $ |
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13 |
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14 // NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION! |
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15 |
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16 #include <boost/mpl/integral_c_tag.hpp> |
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17 #include <boost/mpl/aux_/static_cast.hpp> |
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18 #include <boost/mpl/aux_/nttp_decl.hpp> |
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19 #include <boost/mpl/aux_/config/static_constant.hpp> |
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20 #include <boost/mpl/aux_/config/workaround.hpp> |
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21 |
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22 #include <boost/preprocessor/cat.hpp> |
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23 |
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24 #if !defined(AUX_WRAPPER_NAME) |
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25 # define AUX_WRAPPER_NAME BOOST_PP_CAT(AUX_WRAPPER_VALUE_TYPE,_) |
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26 #endif |
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27 |
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28 #if !defined(AUX_WRAPPER_PARAMS) |
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29 # define AUX_WRAPPER_PARAMS(N) BOOST_MPL_AUX_NTTP_DECL(AUX_WRAPPER_VALUE_TYPE, N) |
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30 #endif |
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31 |
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32 #if !defined(AUX_WRAPPER_INST) |
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33 # if BOOST_WORKAROUND(__MWERKS__, <= 0x2407) |
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34 # define AUX_WRAPPER_INST(value) AUX_WRAPPER_NAME< value > |
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35 # else |
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36 # define AUX_WRAPPER_INST(value) BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::AUX_WRAPPER_NAME< value > |
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37 # endif |
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38 #endif |
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39 |
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40 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN |
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41 |
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42 template< AUX_WRAPPER_PARAMS(N) > |
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43 struct AUX_WRAPPER_NAME |
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44 { |
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45 BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, value = N); |
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46 // agurt, 08/mar/03: SGI MIPSpro C++ workaround, have to #ifdef because some |
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47 // other compilers (e.g. MSVC) are not particulary happy about it |
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48 #if BOOST_WORKAROUND(__EDG_VERSION__, <= 238) |
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49 typedef struct AUX_WRAPPER_NAME type; |
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50 #else |
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51 typedef AUX_WRAPPER_NAME type; |
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52 #endif |
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53 typedef AUX_WRAPPER_VALUE_TYPE value_type; |
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54 typedef integral_c_tag tag; |
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55 |
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56 // have to #ifdef here: some compilers don't like the 'N + 1' form (MSVC), |
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57 // while some other don't like 'value + 1' (Borland), and some don't like |
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58 // either |
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59 #if BOOST_WORKAROUND(__EDG_VERSION__, <= 243) |
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60 private: |
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61 BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, next_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1))); |
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62 BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, prior_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1))); |
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63 public: |
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64 typedef AUX_WRAPPER_INST(next_value) next; |
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65 typedef AUX_WRAPPER_INST(prior_value) prior; |
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66 #elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561)) \ |
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67 || BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(502)) \ |
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68 || BOOST_WORKAROUND(__HP_aCC, <= 53800) |
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69 typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1)) ) next; |
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70 typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1)) ) prior; |
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71 #else |
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72 typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value + 1)) ) next; |
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73 typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value - 1)) ) prior; |
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74 #endif |
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75 |
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76 // enables uniform function call syntax for families of overloaded |
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77 // functions that return objects of both arithmetic ('int', 'long', |
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78 // 'double', etc.) and wrapped integral types (for an example, see |
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79 // "mpl/example/power.cpp") |
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80 operator AUX_WRAPPER_VALUE_TYPE() const { return static_cast<AUX_WRAPPER_VALUE_TYPE>(this->value); } |
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81 }; |
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82 |
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83 #if !defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION) |
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84 template< AUX_WRAPPER_PARAMS(N) > |
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85 AUX_WRAPPER_VALUE_TYPE const AUX_WRAPPER_INST(N)::value; |
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86 #endif |
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87 |
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88 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE |
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89 |
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90 #undef AUX_WRAPPER_NAME |
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91 #undef AUX_WRAPPER_PARAMS |
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92 #undef AUX_WRAPPER_INST |
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93 #undef AUX_WRAPPER_VALUE_TYPE |