| /*-----------------------------------------------------------------------------+ |
| Copyright (c) 2010-2010: Joachim Faulhaber |
| +------------------------------------------------------------------------------+ |
| Distributed under the Boost Software License, Version 1.0. |
| (See accompanying file LICENCE.txt or copy at |
| http://www.boost.org/LICENSE_1_0.txt) |
| +-----------------------------------------------------------------------------*/ |
| #ifndef BOOST_ICL_LEFT_OPEN_INTERVAL_HPP_JOFA_100930 |
| #define BOOST_ICL_LEFT_OPEN_INTERVAL_HPP_JOFA_100930 |
| |
| #include <functional> |
| #include <boost/concept/assert.hpp> |
| #include <boost/icl/concept/interval.hpp> |
| #include <boost/icl/type_traits/value_size.hpp> |
| #include <boost/icl/type_traits/type_to_string.hpp> |
| |
| namespace boost{namespace icl |
| { |
| |
| template <class DomainT, |
| ICL_COMPARE Compare = ICL_COMPARE_INSTANCE(ICL_COMPARE_DEFAULT, DomainT)> |
| class left_open_interval |
| { |
| public: |
| typedef left_open_interval<DomainT,Compare> type; |
| typedef DomainT domain_type; |
| typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare; |
| |
| public: |
| //========================================================================== |
| //= Construct, copy, destruct |
| //========================================================================== |
| /** Default constructor; yields an empty interval <tt>(0,0]</tt>. */ |
| left_open_interval() |
| : _lwb(identity_element<DomainT>::value()), _upb(identity_element<DomainT>::value()) |
| { |
| BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); |
| BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); |
| } |
| |
| //NOTE: Compiler generated copy constructor is used |
| |
| /** Constructor for a left-open singleton interval <tt>(val-1,val]</tt> */ |
| explicit left_open_interval(const DomainT& val) |
| : _lwb(predecessor<DomainT,domain_compare>::apply(val)), _upb(val) |
| { |
| BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); |
| BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); |
| // Only for discrete types this ctor creates an interval containing |
| // a single element only. |
| BOOST_STATIC_ASSERT((icl::is_discrete<DomainT>::value)); |
| BOOST_ASSERT((numeric_minimum<DomainT, domain_compare, is_numeric<DomainT>::value > |
| ::is_less_than(val) )); |
| } |
| |
| /** Interval from <tt>low</tt> to <tt>up</tt> with bounds <tt>bounds</tt> */ |
| left_open_interval(const DomainT& low, const DomainT& up) : |
| _lwb(low), _upb(up) |
| { |
| BOOST_CONCEPT_ASSERT((DefaultConstructibleConcept<DomainT>)); |
| BOOST_CONCEPT_ASSERT((LessThanComparableConcept<DomainT>)); |
| } |
| |
| DomainT lower()const{ return _lwb; } |
| DomainT upper()const{ return _upb; } |
| |
| private: |
| DomainT _lwb; |
| DomainT _upb; |
| }; |
| |
| //============================================================================== |
| //=T left_open_interval -> concept intervals |
| //============================================================================== |
| template<class DomainT, ICL_COMPARE Compare> |
| struct interval_traits< icl::left_open_interval<DomainT, Compare> > |
| { |
| typedef DomainT domain_type; |
| typedef ICL_COMPARE_DOMAIN(Compare,DomainT) domain_compare; |
| typedef icl::left_open_interval<DomainT, Compare> interval_type; |
| |
| static interval_type construct(const domain_type& lo, const domain_type& up) |
| { |
| return interval_type(lo, up); |
| } |
| |
| static domain_type lower(const interval_type& inter_val){ return inter_val.lower(); }; |
| static domain_type upper(const interval_type& inter_val){ return inter_val.upper(); }; |
| }; |
| |
| |
| //============================================================================== |
| //= Type traits |
| //============================================================================== |
| template <class DomainT, ICL_COMPARE Compare> |
| struct interval_bound_type< left_open_interval<DomainT,Compare> > |
| { |
| typedef interval_bound_type type; |
| BOOST_STATIC_CONSTANT(bound_type, value = interval_bounds::static_left_open); |
| }; |
| |
| template <class DomainT, ICL_COMPARE Compare> |
| struct type_to_string<icl::left_open_interval<DomainT,Compare> > |
| { |
| static std::string apply() |
| { return "(I]<"+ type_to_string<DomainT>::apply() +">"; } |
| }; |
| |
| template<class DomainT, ICL_COMPARE Compare> |
| struct value_size<icl::left_open_interval<DomainT,Compare> > |
| { |
| static std::size_t apply(const icl::left_open_interval<DomainT>&) |
| { return 2; } |
| }; |
| |
| }} // namespace icl boost |
| |
| #endif |
| |