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//
// Test for boost/detail/iterator.hpp
//
// Copyright 2014 Peter Dimov
//
// 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
//
#define BOOST_ALLOW_DEPRECATED_HEADERS
#include <boost/detail/iterator.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <boost/type_traits/is_same.hpp>
#include <cstddef>
#include <list>
/*
namespace boost {
namespace detail {
template <class Iterator> struct iterator_traits: std::iterator_traits<Iterator>
{
};
using std::distance;
} // namespace detail
} // namespace boost
*/
// struct C {} doesn't work with libc++.
typedef std::forward_iterator_tag C;
struct T
{
};
struct D
{
};
struct P
{
};
struct R
{
};
template< class Category, class T, class Distance = std::ptrdiff_t, class Pointer = T*, class Reference = T& >
struct iterator
{
typedef T value_type;
typedef Distance difference_type;
typedef Pointer pointer;
typedef Reference reference;
typedef Category iterator_category;
};
int main()
{
using boost::is_same;
/*
template<class Iterator> struct iterator_traits {
typedef typename Iterator::difference_type difference_type;
typedef typename Iterator::value_type value_type;
typedef typename Iterator::pointer pointer;
typedef typename Iterator::reference reference;
typedef typename Iterator::iterator_category iterator_category;
};
*/
{
typedef ::iterator<C,T,D,P,R> It;
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::iterator_category,C>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::value_type,T>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::difference_type,D>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::pointer,P>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::reference,R>));
}
/*
template<class T> struct iterator_traits<T*> {
typedef ptrdiff_t difference_type;
typedef T value_type;
typedef T* pointer;
typedef T& reference;
typedef random_access_iterator_tag iterator_category;
};
*/
{
typedef T* It;
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::iterator_category,std::random_access_iterator_tag>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::value_type,T>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::difference_type,std::ptrdiff_t>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::pointer,T*>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::reference,T&>));
}
/*
template<class T> struct iterator_traits<const T*> {
typedef ptrdiff_t difference_type;
typedef T value_type;
typedef const T* pointer;
typedef const T& reference;
typedef random_access_iterator_tag iterator_category;
};
*/
{
typedef T const* It;
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::iterator_category,std::random_access_iterator_tag>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::value_type,T>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::difference_type,std::ptrdiff_t>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::pointer,T const*>));
BOOST_TEST_TRAIT_TRUE((is_same<boost::detail::iterator_traits<It>::reference,T const&>));
}
/*
template<class InputIterator>
typename iterator_traits<InputIterator>::difference_type
distance( InputIterator first, InputIterator last );
*/
{
int const N = 5;
T x[ N ] = {};
BOOST_TEST_EQ( boost::detail::distance( x, x + N ), N );
}
{
int const N = 5;
T const x[ N ] = {};
BOOST_TEST_EQ( boost::detail::distance( x, x + N ), N );
}
{
int const N = 5;
std::list<T> x( N );
BOOST_TEST_EQ( boost::detail::distance( x.begin(), x.end() ), x.size() );
}
return boost::report_errors();
}
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