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93 lines
3.5 KiB
93 lines
3.5 KiB
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// Copyright Aleksey Gurtovoy 2000-2006 |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// See http://www.boost.org/libs/mpl for documentation. |
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// $Id: integral_wrapper.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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// $Revision: 49267 $ |
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// NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION! |
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#include <boost/mpl/integral_c_tag.hpp> |
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#include <boost/mpl/aux_/static_cast.hpp> |
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#include <boost/mpl/aux_/nttp_decl.hpp> |
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#include <boost/mpl/aux_/config/static_constant.hpp> |
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#include <boost/mpl/aux_/config/workaround.hpp> |
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#include <boost/preprocessor/cat.hpp> |
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#if !defined(AUX_WRAPPER_NAME) |
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# define AUX_WRAPPER_NAME BOOST_PP_CAT(AUX_WRAPPER_VALUE_TYPE,_) |
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#endif |
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#if !defined(AUX_WRAPPER_PARAMS) |
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# define AUX_WRAPPER_PARAMS(N) BOOST_MPL_AUX_NTTP_DECL(AUX_WRAPPER_VALUE_TYPE, N) |
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#endif |
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#if !defined(AUX_WRAPPER_INST) |
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# if BOOST_WORKAROUND(__MWERKS__, <= 0x2407) |
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# define AUX_WRAPPER_INST(value) AUX_WRAPPER_NAME< value > |
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# else |
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# define AUX_WRAPPER_INST(value) BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::AUX_WRAPPER_NAME< value > |
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# endif |
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#endif |
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BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN |
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template< AUX_WRAPPER_PARAMS(N) > |
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struct AUX_WRAPPER_NAME |
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{ |
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BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, value = N); |
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// agurt, 08/mar/03: SGI MIPSpro C++ workaround, have to #ifdef because some |
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// other compilers (e.g. MSVC) are not particulary happy about it |
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#if BOOST_WORKAROUND(__EDG_VERSION__, <= 238) |
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typedef struct AUX_WRAPPER_NAME type; |
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#else |
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typedef AUX_WRAPPER_NAME type; |
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#endif |
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typedef AUX_WRAPPER_VALUE_TYPE value_type; |
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typedef integral_c_tag tag; |
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// have to #ifdef here: some compilers don't like the 'N + 1' form (MSVC), |
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// while some other don't like 'value + 1' (Borland), and some don't like |
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// either |
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#if BOOST_WORKAROUND(__EDG_VERSION__, <= 243) |
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private: |
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BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, next_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1))); |
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BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, prior_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1))); |
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public: |
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typedef AUX_WRAPPER_INST(next_value) next; |
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typedef AUX_WRAPPER_INST(prior_value) prior; |
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#elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561)) \ |
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|| BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(502)) \ |
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|| (BOOST_WORKAROUND(__HP_aCC, <= 53800) && (BOOST_WORKAROUND(__hpxstd98, != 1))) |
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typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1)) ) next; |
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typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1)) ) prior; |
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#else |
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typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value + 1)) ) next; |
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typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value - 1)) ) prior; |
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#endif |
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// enables uniform function call syntax for families of overloaded |
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// functions that return objects of both arithmetic ('int', 'long', |
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// 'double', etc.) and wrapped integral types (for an example, see |
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// "mpl/example/power.cpp") |
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operator AUX_WRAPPER_VALUE_TYPE() const { return static_cast<AUX_WRAPPER_VALUE_TYPE>(this->value); } |
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}; |
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#if !defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION) |
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template< AUX_WRAPPER_PARAMS(N) > |
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AUX_WRAPPER_VALUE_TYPE const AUX_WRAPPER_INST(N)::value; |
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#endif |
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BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE |
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#undef AUX_WRAPPER_NAME |
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#undef AUX_WRAPPER_PARAMS |
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#undef AUX_WRAPPER_INST |
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#undef AUX_WRAPPER_VALUE_TYPE
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