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// Boost.Range library
//
// Copyright Neil Groves 2009.
// Copyright Thorsten Ottosen 2003-2004. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// For more information, see http://www.boost.org/libs/range/
//
#ifndef BOOST_RANGE_SUB_RANGE_HPP
#define BOOST_RANGE_SUB_RANGE_HPP
#include <boost/detail/workaround.hpp>
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500))
#pragma warning( push )
#pragma warning( disable : 4996 )
#endif
#include <boost/range/config.hpp>
#include <boost/range/iterator_range.hpp>
#include <boost/range/value_type.hpp>
#include <boost/range/size_type.hpp>
#include <boost/range/difference_type.hpp>
#include <boost/range/reference.hpp>
#include <boost/range/algorithm/equal.hpp>
#include <boost/assert.hpp>
#include <boost/type_traits/is_reference.hpp>
#include <boost/type_traits/remove_reference.hpp>
namespace boost
{
namespace range_detail
{
template<class ForwardRange, class TraversalTag>
class sub_range_base
: public iterator_range<
BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
>
{
typedef iterator_range<
BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
> base;
protected:
typedef BOOST_DEDUCED_TYPENAME base::iterator_range_ iterator_range_;
public:
typedef BOOST_DEDUCED_TYPENAME range_value<ForwardRange>::type value_type;
typedef BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type iterator;
typedef BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type const_iterator;
typedef BOOST_DEDUCED_TYPENAME range_difference<ForwardRange>::type difference_type;
typedef BOOST_DEDUCED_TYPENAME range_size<ForwardRange>::type size_type;
typedef BOOST_DEDUCED_TYPENAME range_reference<ForwardRange>::type reference;
typedef BOOST_DEDUCED_TYPENAME range_reference<const ForwardRange>::type const_reference;
sub_range_base()
{
}
template<class Iterator>
sub_range_base(Iterator first, Iterator last)
: base(first, last)
{
}
reference front()
{
return base::front();
}
const_reference front() const
{
return base::front();
}
};
template<class ForwardRange>
class sub_range_base<ForwardRange, bidirectional_traversal_tag>
: public sub_range_base<ForwardRange, forward_traversal_tag>
{
typedef sub_range_base<ForwardRange, forward_traversal_tag> base;
public:
sub_range_base()
{
}
template<class Iterator>
sub_range_base(Iterator first, Iterator last)
: base(first, last)
{
}
BOOST_DEDUCED_TYPENAME base::reference back()
{
return base::back();
}
BOOST_DEDUCED_TYPENAME base::const_reference back() const
{
return base::back();
}
};
template<class ForwardRange>
class sub_range_base<ForwardRange, random_access_traversal_tag>
: public sub_range_base<ForwardRange, bidirectional_traversal_tag>
{
typedef sub_range_base<ForwardRange, bidirectional_traversal_tag> base;
public:
sub_range_base()
{
}
template<class Iterator>
sub_range_base(Iterator first, Iterator last)
: base(first, last)
{
}
BOOST_DEDUCED_TYPENAME base::reference
operator[](BOOST_DEDUCED_TYPENAME base::difference_type n)
{
return this->begin()[n];
}
BOOST_DEDUCED_TYPENAME base::const_reference
operator[](BOOST_DEDUCED_TYPENAME base::difference_type n) const
{
return this->begin()[n];
}
};
} // namespace range_detail
template<class ForwardRange>
class sub_range
: public range_detail::sub_range_base<
ForwardRange,
BOOST_DEDUCED_TYPENAME iterator_traversal<
BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
>::type
>
{
typedef BOOST_DEDUCED_TYPENAME range_iterator<
ForwardRange
>::type iterator_t;
typedef range_detail::sub_range_base<
ForwardRange,
BOOST_DEDUCED_TYPENAME iterator_traversal<
BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type
>::type
> base;
typedef BOOST_DEDUCED_TYPENAME base::impl impl;
protected:
typedef BOOST_DEDUCED_TYPENAME base::iterator_range_ iterator_range_;
private:
template<class Source>
struct is_compatible_range
: is_convertible<
BOOST_DEDUCED_TYPENAME mpl::eval_if<
has_range_iterator<Source>,
range_iterator<Source>,
mpl::identity<void>
>::type,
BOOST_DEDUCED_TYPENAME base::iterator
>
{
};
public:
sub_range()
{ }
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500) )
sub_range(const sub_range& r)
: base(impl::adl_begin(static_cast<const base&>(r)),
impl::adl_end(static_cast<const base&>(r)))
{ }
#endif
template< class ForwardRange2 >
sub_range(
ForwardRange2& r,
BOOST_DEDUCED_TYPENAME ::boost::enable_if<
is_compatible_range<ForwardRange2>
>::type* = 0
)
: base(impl::adl_begin(r), impl::adl_end(r))
{
}
template< class ForwardRange2 >
sub_range(
const ForwardRange2& r,
BOOST_DEDUCED_TYPENAME ::boost::enable_if<
is_compatible_range<const ForwardRange2>
>::type* = 0
)
: base(impl::adl_begin(r), impl::adl_end(r))
{
}
BOOST_DEDUCED_TYPENAME base::const_iterator begin() const
{
return base::begin();
}
BOOST_DEDUCED_TYPENAME base::iterator begin()
{
return base::begin();
}
BOOST_DEDUCED_TYPENAME base::const_iterator end() const
{
return base::end();
}
BOOST_DEDUCED_TYPENAME base::iterator end()
{
return base::end();
}
template< class Iter >
sub_range( Iter first, Iter last ) :
base( first, last )
{ }
template<class ForwardRange2>
BOOST_DEDUCED_TYPENAME ::boost::enable_if<
is_compatible_range<ForwardRange2>,
sub_range&
>::type
operator=(ForwardRange2& r)
{
iterator_range_::operator=( r );
return *this;
}
template<class ForwardRange2>
BOOST_DEDUCED_TYPENAME ::boost::enable_if<
is_compatible_range<const ForwardRange2>,
sub_range&
>::type
operator=( const ForwardRange2& r )
{
iterator_range_::operator=( r );
return *this;
}
sub_range& operator=( const sub_range& r )
{
iterator_range_::operator=( static_cast<const iterator_range_&>(r) );
return *this;
}
sub_range& advance_begin(
BOOST_DEDUCED_TYPENAME base::difference_type n)
{
std::advance(this->m_Begin, n);
return *this;
}
sub_range& advance_end(
BOOST_DEDUCED_TYPENAME base::difference_type n)
{
std::advance(this->m_End, n);
return *this;
}
};
} // namespace 'boost'
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500))
#pragma warning( pop )
#endif
#endif
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