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 | // $Id: integral_wrapper.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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11 | // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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12 | // $Revision: 49267 $ |
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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) && (BOOST_WORKAROUND(__hpxstd98, != 1))) |
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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 |
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