50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
|
#pragma once
|
||
|
#include "dxxsconf.h"
|
||
|
#include "compiler-begin.h"
|
||
|
|
||
|
template <typename iterator>
|
||
|
struct partial_range_t
|
||
|
{
|
||
|
iterator m_begin, m_end;
|
||
|
partial_range_t(iterator b, iterator e) :
|
||
|
m_begin(b), m_end(e)
|
||
|
{
|
||
|
}
|
||
|
iterator begin() const { return m_begin; }
|
||
|
iterator end() const { return m_end; }
|
||
|
};
|
||
|
|
||
|
#ifdef DXX_HAVE_BOOST_FOREACH
|
||
|
#include <boost/range/const_iterator.hpp>
|
||
|
#include <boost/range/mutable_iterator.hpp>
|
||
|
|
||
|
namespace boost
|
||
|
{
|
||
|
template <typename iterator>
|
||
|
struct range_mutable_iterator< partial_range_t<iterator> >
|
||
|
{
|
||
|
typedef iterator type;
|
||
|
};
|
||
|
|
||
|
template <typename iterator>
|
||
|
struct range_const_iterator< partial_range_t<iterator> >
|
||
|
{
|
||
|
typedef iterator type;
|
||
|
};
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
template <typename T>
|
||
|
partial_range_t<typename T::iterator> partial_range(T &t, typename T::size_type l)
|
||
|
{
|
||
|
auto b = begin(t);
|
||
|
return partial_range_t<typename T::iterator>(b, b + l);
|
||
|
}
|
||
|
|
||
|
template <typename T>
|
||
|
partial_range_t<typename T::const_iterator> partial_range(const T &t, typename T::size_type l)
|
||
|
{
|
||
|
auto b = begin(t);
|
||
|
return partial_range_t<typename T::const_iterator>(b, b + l);
|
||
|
}
|