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// Copyright 2005-2010 Daniel James.
// Distributed under 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)
#if !defined(BOOST_UNORDERED_TEST_HELPERS_INPUT_ITERATOR_HEADER)
#define BOOST_UNORDERED_TEST_HELPERS_INPUT_ITERATOR_HEADER
#include <boost/config.hpp>
#include <iterator>
namespace test {
template <class Iterator> struct proxy
{
typedef typename Iterator::value_type value_type;
explicit proxy(value_type const& v) : v_(v) {}
proxy(proxy const& x) : v_(x.v_) {}
operator value_type const&() const { return v_; }
value_type v_;
private:
proxy& operator=(proxy const&);
};
template <class Iterator> struct input_iterator_adaptor
{
typedef typename std::iterator_traits<Iterator>::value_type value_type;
typedef typename std::iterator_traits<Iterator>::pointer pointer;
typedef proxy<Iterator> reference;
typedef std::ptrdiff_t difference_type;
typedef std::input_iterator_tag iterator_category;
input_iterator_adaptor() : base_() {}
explicit input_iterator_adaptor(Iterator& it) : base_(&it) {}
proxy<Iterator> operator*() const { return proxy<Iterator>(**base_); }
value_type* operator->() const { return &**base_; }
input_iterator_adaptor& operator++()
{
++*base_;
return *this;
}
// input_iterator_adaptor operator++(int) {
//}
bool operator==(input_iterator_adaptor const& x) const
{
return *base_ == *x.base_;
}
bool operator!=(input_iterator_adaptor const& x) const
{
return *base_ != *x.base_;
}
private:
Iterator* base_;
};
template <class Iterator>
input_iterator_adaptor<Iterator> input_iterator(Iterator& it)
{
return input_iterator_adaptor<Iterator>(it);
}
template <class Iterator> struct copy_iterator_adaptor
{
typedef typename std::iterator_traits<Iterator>::value_type value_type;
typedef
typename std::iterator_traits<Iterator>::difference_type difference_type;
typedef typename std::iterator_traits<Iterator>::iterator_category
iterator_category;
typedef typename std::iterator_traits<Iterator>::pointer pointer;
typedef proxy<Iterator> reference;
copy_iterator_adaptor() : base_() {}
explicit copy_iterator_adaptor(Iterator const& it) : base_(it) {}
value_type operator*() const { return *base_; }
value_type* operator->() const { return &*base_; }
value_type operator[](difference_type d) { return base_[d]; }
copy_iterator_adaptor& operator++()
{
++base_;
return *this;
}
copy_iterator_adaptor operator++(int)
{
copy_iterator_adaptor tmp(*this);
++base_;
return tmp;
}
copy_iterator_adaptor& operator--()
{
--base_;
return *this;
}
copy_iterator_adaptor operator--(int)
{
copy_iterator_adaptor tmp(*this);
--base_;
return tmp;
}
copy_iterator_adaptor operator+=(difference_type x)
{
base_ += x;
return *this;
}
copy_iterator_adaptor operator-=(difference_type x)
{
base_ -= x;
return *this;
}
copy_iterator_adaptor operator+(difference_type n)
{
return copy_iterator_adaptor(base_ + n);
}
copy_iterator_adaptor operator-(difference_type n)
{
return copy_iterator_adaptor(base_ - n);
}
friend copy_iterator_adaptor operator+(
difference_type n, copy_iterator_adaptor x)
{
return x + n;
}
difference_type operator-(copy_iterator_adaptor const& other)
{
return base_ - other.base_;
}
bool operator==(copy_iterator_adaptor const& x) const
{
return base_ == x.base_;
}
bool operator!=(copy_iterator_adaptor const& x) const
{
return base_ != x.base_;
}
bool operator<(copy_iterator_adaptor const& x) const
{
return base_ < x.base_;
}
bool operator>(copy_iterator_adaptor const& x) const
{
return base_ > x.base_;
}
bool operator<=(copy_iterator_adaptor const& x) const
{
return base_ <= x.base_;
}
bool operator>=(copy_iterator_adaptor const& x) const
{
return base_ >= x.base_;
}
private:
Iterator base_;
};
template <class Iterator>
copy_iterator_adaptor<Iterator> copy_iterator(Iterator const& it)
{
return copy_iterator_adaptor<Iterator>(it);
}
}
#endif
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