128 lines
4.3 KiB
Plaintext
128 lines
4.3 KiB
Plaintext
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/*=============================================================================
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Copyright (c) 2001-2003 Joel de Guzman
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http://spirit.sourceforge.net/
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef BOOST_SPIRIT_RANGE_RUN_HPP
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#define BOOST_SPIRIT_RANGE_RUN_HPP
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///////////////////////////////////////////////////////////////////////////////
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#include <vector>
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#include <boost/spirit/home/classic/namespace.hpp>
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit {
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BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
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namespace utility { namespace impl {
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///////////////////////////////////////////////////////////////////////////
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//
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// range class
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//
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// Implements a closed range of values. This class is used in
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// the implementation of the range_run class.
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//
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// { Low level implementation detail }
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// { Not to be confused with BOOST_SPIRIT_CLASSIC_NS::range }
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//
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///////////////////////////////////////////////////////////////////////////
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template <typename CharT>
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struct range {
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range(CharT first, CharT last);
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bool is_valid() const;
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bool includes(CharT v) const;
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bool includes(range const& r) const;
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bool overlaps(range const& r) const;
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void merge(range const& r);
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CharT first;
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CharT last;
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};
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//////////////////////////////////
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template <typename CharT>
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struct range_char_compare {
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bool operator()(range<CharT> const& x, const CharT y) const
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{ return x.first < y; }
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bool operator()(const CharT x, range<CharT> const& y) const
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{ return x < y.first; }
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// This additional operator is required for the checked STL shipped
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// with VC8 testing the ordering of the iterators passed to the
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// std::lower_bound algo this range_char_compare<> predicate is passed
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// to.
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bool operator()(range<CharT> const& x, range<CharT> const& y) const
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{ return x.first < y.first; }
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};
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//////////////////////////////////
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template <typename CharT>
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struct range_compare {
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bool operator()(range<CharT> const& x, range<CharT> const& y) const
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{ return x.first < y.first; }
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};
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///////////////////////////////////////////////////////////////////////////
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//
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// range_run
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//
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// An implementation of a sparse bit (boolean) set. The set uses
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// a sorted vector of disjoint ranges. This class implements the
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// bare minimum essentials from which the full range of set
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// operators can be implemented. The set is constructed from
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// ranges. Internally, adjacent or overlapping ranges are
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// coalesced.
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//
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// range_runs are very space-economical in situations where there
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// are lots of ranges and a few individual disjoint values.
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// Searching is O(log n) where n is the number of ranges.
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//
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// { Low level implementation detail }
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//
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///////////////////////////////////////////////////////////////////////////
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template <typename CharT>
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class range_run {
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public:
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typedef range<CharT> range_t;
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typedef std::vector<range_t> run_t;
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typedef typename run_t::iterator iterator;
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typedef typename run_t::const_iterator const_iterator;
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void swap(range_run& rr);
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bool test(CharT v) const;
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void set(range_t const& r);
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void clear(range_t const& r);
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void clear();
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const_iterator begin() const;
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const_iterator end() const;
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private:
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void merge(iterator iter, range_t const& r);
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run_t run;
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};
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}}
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BOOST_SPIRIT_CLASSIC_NAMESPACE_END
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}} // namespace BOOST_SPIRIT_CLASSIC_NS::utility::impl
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#endif
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#include <boost/spirit/home/classic/utility/impl/chset/range_run.ipp>
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