56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
/*
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* This file is part of the DXX-Rebirth project <http://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*/
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#pragma once
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#include "dxxsconf.h"
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#include "compiler-begin.h"
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template <typename iterator>
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struct partial_range_t
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{
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iterator m_begin, m_end;
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partial_range_t(iterator b, iterator e) :
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m_begin(b), m_end(e)
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{
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}
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iterator begin() const { return m_begin; }
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iterator end() const { return m_end; }
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};
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#ifdef DXX_HAVE_BOOST_FOREACH
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#include <boost/range/const_iterator.hpp>
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#include <boost/range/mutable_iterator.hpp>
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namespace boost
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{
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template <typename iterator>
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struct range_mutable_iterator< partial_range_t<iterator> >
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{
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typedef iterator type;
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};
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template <typename iterator>
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struct range_const_iterator< partial_range_t<iterator> >
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{
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typedef iterator type;
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};
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}
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#endif
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template <typename T>
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partial_range_t<typename T::iterator> partial_range(T &t, typename T::size_type l)
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{
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auto b = begin(t);
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return partial_range_t<typename T::iterator>(b, b + l);
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}
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template <typename T>
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partial_range_t<typename T::const_iterator> partial_range(const T &t, typename T::size_type l)
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{
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auto b = begin(t);
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return partial_range_t<typename T::const_iterator>(b, b + l);
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}
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