ceph/src/boost/libs/icl/include/boost/icl/right_open_interval.hpp

   1 /*-----------------------------------------------------------------------------+
   2 Copyright (c) 2010-2010: Joachim Faulhaber
   3 +------------------------------------------------------------------------------+
   4    Distributed under the Boost Software License, Version 1.0.
   5       (See accompanying file LICENCE.txt or copy at
   6            http://www.boost.org/LICENSE_1_0.txt)
   7 +-----------------------------------------------------------------------------*/
   8 #ifndef BOOST_ICL_RIGHT_OPEN_INTERVAL_HPP_JOFA_100323
   9 #define BOOST_ICL_RIGHT_OPEN_INTERVAL_HPP_JOFA_100323
  10
  11 #include <functional>
  12 #include <boost/concept/assert.hpp>
  13 #include <boost/icl/concept/interval.hpp>
  14 #include <boost/icl/type_traits/succ_pred.hpp>
  15 #include <boost/icl/type_traits/value_size.hpp>
  16 #include <boost/icl/type_traits/type_to_string.hpp>
  17
  18 namespace boost{namespace icl
  19 {
  20
  21 template <class DomainT,
  22           ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT)>
  23 class right_open_interval
  24 {
  25 public:
  26     typedef right_open_interval<DomainT,Compare> type;
  27     typedef DomainT domain_type;
  28     typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
  29
  30 public:
  31     //==========================================================================
  32     //= Construct, copy, destruct
  33     //==========================================================================
  34     /** Default constructor; yields an empty interval <tt>[0,0)</tt>. */
  35     right_open_interval()
  36         : _lwb(identity_element<DomainT>::value()), _upb(identity_element<DomainT>::value())
  37     {
  38         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
  39         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
  40     }
  41
  42     //NOTE: Compiler generated copy constructor is used
  43
  44     /** Constructor for a singleton interval <tt>[val,val+1)</tt> */
  45     explicit right_open_interval(const DomainT& val)
  46         : _lwb(val), _upb(icl::successor<DomainT,domain_compare>::apply(val))
  47     {
  48         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
  49         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
  50         // Only for discrete types this ctor creates an interval containing
  51         // a single element only.
  52         BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value));
  53     }
  54
  55     /** Interval from <tt>low</tt> to <tt>up</tt> with bounds <tt>bounds</tt> */
  56     right_open_interval(const DomainT& low, const DomainT& up) :
  57         _lwb(low), _upb(up)
  58     {
  59         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
  60         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
  61     }
  62
  63     domain_type lower()const{ return _lwb; }
  64     domain_type upper()const{ return _upb; }
  65
  66 private:
  67     domain_type _lwb;
  68     domain_type _upb;
  69 };
  70
  71 //==============================================================================
  72 //=T right_open_interval -> concept intervals
  73 //==============================================================================
  74 template<class DomainT, ICL_COMPARE Compare>
  75 struct interval_traits< icl::right_open_interval<DomainT, Compare> >
  76 {
  77     typedef DomainT domain_type;
  78     typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
  79     typedef icl::right_open_interval<DomainT, Compare> interval_type;
  80
  81     static interval_type construct(const domain_type& lo, const domain_type& up)
  82     {
  83         return interval_type(lo, up);
  84     }
  85
  86     static domain_type lower(const interval_type& inter_val){ return inter_val.lower(); };
  87     static domain_type upper(const interval_type& inter_val){ return inter_val.upper(); };
  88 };
  89
  90
  91 //==============================================================================
  92 //= Type traits
  93 //==============================================================================
  94 template <class DomainT, ICL_COMPARE Compare>
  95 struct interval_bound_type< right_open_interval<DomainT,Compare> >
  96 {
  97     typedef interval_bound_type type;
  98     BOOST_STATIC_CONSTANT(bound_type, value = interval_bounds::static_right_open);
  99 };
 100
 101 template <class DomainT, ICL_COMPARE Compare>
 102 struct type_to_string<icl::right_open_interval<DomainT,Compare> >
 103 {
 104     static std::string apply()
 105     { return "[I)<"+ type_to_string<DomainT>::apply() +">"; }
 106 };
 107
 108 template<class DomainT, ICL_COMPARE Compare>
 109 struct value_size<icl::right_open_interval<DomainT,Compare> >
 110 {
 111     static std::size_t apply(const icl::right_open_interval<DomainT>&)
 112     { return 2; }
 113 };
 114
 115 }} // namespace icl boost
 116
 117 #endif
 118