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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
- //
- #include <boost/detail/iterator.hpp>
- #include <boost/core/is_same.hpp>
- #include <boost/core/lightweight_test_trait.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 wotk 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::core::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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