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Viewing changes to libs/boost-lib/boost/type_traits/integral_constant.hpp

  • Committer: Bazaar Package Importer
  • Author(s): Alessio Treglia
  • Date: 2010-11-04 11:46:25 UTC
  • mto: This revision was merged to the branch mainline in revision 8.
  • Revision ID: james.westby@ubuntu.com-20101104114625-8xfdhvhpsm51i0nu
Tags: upstream-0.8.0
Import upstream version 0.8.0

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libs/boost-lib/boost/type_traits/integral_constant.hpp
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#endif
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struct integral_constant : public mpl::integral_c<T, val>
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{
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   //BOOST_STATIC_CONSTANT(T, value = val);
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   //typedef T value_type;
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   typedef integral_constant<T,val> type;
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#if 0
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   //
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   // everything that follows now, is MPL-compatibility code:
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   //
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   typedef ::boost::mpl::integral_c_tag tag;
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   // have to #ifdef here: some compilers don't like the 'val + 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(T, next_value = BOOST_MPL_AUX_STATIC_CAST(T, (val + 1)));
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   BOOST_STATIC_CONSTANT(T, prior_value = BOOST_MPL_AUX_STATIC_CAST(T, (val - 1)));
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public:
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   typedef integral_constant<T,next_value> next;
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   typedef integral_constant<T,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, BOOST_TESTED_AT(53800))
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   typedef integral_constant<T, ( BOOST_MPL_AUX_STATIC_CAST(T, (val + 1)) )> next;
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   typedef integral_constant<T, ( BOOST_MPL_AUX_STATIC_CAST(T, (val - 1)) )> prior;
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#else
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   typedef integral_constant<T, ( BOOST_MPL_AUX_STATIC_CAST(T, (value + 1)) )> next;
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   typedef integral_constant<T, ( BOOST_MPL_AUX_STATIC_CAST(T, (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 T() const { return static_cast<T>(this->value); } 
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#endif
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};
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template<> struct integral_constant<bool,true> : public mpl::true_ 
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{
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
 
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
 
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# pragma warning(push)
 
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# pragma warning(disable:4097)
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   typedef mpl::true_ base_;
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   using base_::value;
 
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# pragma warning(pop)
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#endif
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   typedef integral_constant<bool,true> type;
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};
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template<> struct integral_constant<bool,false> : public mpl::false_ 
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{
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1200)
 
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
 
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# pragma warning(push)
 
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# pragma warning(disable:4097)
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   typedef mpl::false_ base_;
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   using base_::value;
 
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# pragma warning(pop)
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#endif
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   typedef integral_constant<bool,false> type;
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};