[857] | 1 |
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| 2 | // Copyright Aleksey Gurtovoy 2000-2004
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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: 2004/09/02 15:40:43 $
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| 12 | // $Revision: 1.10 $
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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, BOOST_TESTED_AT(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
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