ceph/src/boost/libs/icl/include/boost/icl/closed_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_CLOSED_INTERVAL_HPP_JOFA_100324
   9 #define BOOST_ICL_CLOSED_INTERVAL_HPP_JOFA_100324
  10
  11 #include <boost/icl/detail/concept_check.hpp>
  12 #include <boost/icl/concept/interval.hpp>
  13 #include <boost/icl/type_traits/value_size.hpp>
  14 #include <boost/icl/type_traits/type_to_string.hpp>
  15
  16 namespace boost{namespace icl
  17 {
  18
  19 template <class DomainT,
  20           ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT)>
  21 class closed_interval
  22 {
  23 public:
  24     typedef closed_interval<DomainT,Compare> type;
  25     typedef DomainT domain_type;
  26     typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
  27
  28 public:
  29     //==========================================================================
  30     //= Construct, copy, destruct
  31     //==========================================================================
  32     /** Default constructor; yields an empty interval <tt>[0,0)</tt>. */
  33     closed_interval()
  34         : _lwb(unit_element<DomainT>::value()), _upb(identity_element<DomainT>::value())
  35     {
  36         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
  37         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
  38         BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value));
  39     }
  40
  41     //NOTE: Compiler generated copy constructor is used
  42
  43     /** Constructor for a closed singleton interval <tt>[val,val]</tt> */
  44     explicit closed_interval(const DomainT& val)
  45         : _lwb(val), _upb(val)
  46     {
  47         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
  48         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
  49         BOOST_STATIC_ASSERT((!icl::is_continuous<DomainT>::value));
  50     }
  51
  52     /** Interval from <tt>low</tt> to <tt>up</tt> with bounds <tt>bounds</tt> */
  53     closed_interval(const DomainT& low, const DomainT& up) :
  54         _lwb(low), _upb(up)
  55     {
  56         BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>));
  57         BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>));
  58     }
  59
  60     DomainT lower()const{ return _lwb; }
  61     DomainT upper()const{ return _upb; }
  62
  63     DomainT first()const{ return _lwb; }
  64     DomainT last() const{ return _upb; }
  65
  66 private:
  67     DomainT _lwb;
  68     DomainT _upb;
  69 };
  70
  71
  72 //==============================================================================
  73 //=T closed_interval -> concept intervals
  74 //==============================================================================
  75 template<class DomainT, ICL_COMPARE Compare>
  76 struct interval_traits< icl::closed_interval<DomainT, Compare> >
  77 {
  78     typedef DomainT domain_type;
  79     typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare;
  80     typedef icl::closed_interval<DomainT, Compare> interval_type;
  81
  82     static interval_type construct(const domain_type& lo, const domain_type& up)
  83     {
  84         return interval_type(lo, up);
  85     }
  86
  87     static domain_type lower(const interval_type& inter_val){ return inter_val.lower(); };
  88     static domain_type upper(const interval_type& inter_val){ return inter_val.upper(); };
  89 };
  90
  91 //==============================================================================
  92 //= Type traits
  93 //==============================================================================
  94 template <class DomainT, ICL_COMPARE Compare>
  95 struct interval_bound_type< closed_interval<DomainT,Compare> >
  96 {
  97     typedef interval_bound_type type;
  98     BOOST_STATIC_CONSTANT(bound_type, value = interval_bounds::static_closed);
  99 };
 100
 101 template <class DomainT, ICL_COMPARE Compare>
 102 struct type_to_string<icl::closed_interval<DomainT,Compare> >
 103 {
 104     static std::string apply()
 105     { return "[I]<"+ type_to_string<DomainT>::apply() +">"; }
 106 };
 107
 108 template<class DomainT>
 109 struct value_size<icl::closed_interval<DomainT> >
 110 {
 111     static std::size_t apply(const icl::closed_interval<DomainT>&)
 112     { return 2; }
 113 };
 114
 115 }} // namespace icl boost
 116
 117 #endif
 118