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/*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* https://www.boost.org/LICENSE_1_0.txt)
*
* Copyright (c) 2023 Andrey Semashev
*/
/*!
* \file is_iterator.cpp
*
* This header contains tests for the \c is_iterator type trait.
*/
#include <boost/iterator/is_iterator.hpp>
#include <cstddef>
#include <list>
#include <vector>
#include <string>
#include <iterator>
#include <boost/iterator/iterator_adaptor.hpp>
#include <boost/core/lightweight_test.hpp>
template< typename T >
struct value_iterator
{
typedef std::input_iterator_tag iterator_category;
typedef T value_type;
typedef std::ptrdiff_t difference_type;
typedef T* pointer;
typedef T& reference;
value_type operator*() const;
};
template< typename T >
struct proxy_iterator
{
typedef T value_type;
typedef std::output_iterator_tag iterator_category;
typedef std::ptrdiff_t difference_type;
typedef T* pointer;
typedef T& reference;
struct proxy
{
operator value_type&() const;
proxy& operator=(value_type) const;
};
proxy operator*() const;
};
template< typename T >
struct lvalue_iterator
{
typedef T value_type;
typedef T& reference;
typedef T difference_type;
typedef std::input_iterator_tag iterator_category;
typedef T* pointer;
T& operator*() const;
lvalue_iterator& operator++();
lvalue_iterator operator++(int);
};
template< typename T >
struct constant_lvalue_iterator
{
typedef T value_type;
typedef T const& reference;
typedef T difference_type;
typedef std::input_iterator_tag iterator_category;
typedef T const* pointer;
T const& operator*() const;
constant_lvalue_iterator& operator++();
constant_lvalue_iterator operator++(int);
};
template< typename Iterator >
class adapted_iterator :
public boost::iterators::iterator_adaptor< adapted_iterator< Iterator >, Iterator >
{
friend class iterator_core_access;
private:
typedef boost::iterators::iterator_adaptor< adapted_iterator< Iterator >, Iterator > base_type;
private:
typename base_type::reference dereference() const;
void increment();
void decrement();
void advance(typename base_type::difference_type n);
template< typename OtherIterator >
typename base_type::difference_type distance_to(adapted_iterator< OtherIterator > const& y) const;
};
struct complete {};
struct incomplete;
int main()
{
BOOST_TEST(boost::iterators::is_iterator< int* >::value);
BOOST_TEST(boost::iterators::is_iterator< const int* >::value);
BOOST_TEST(boost::iterators::is_iterator< complete* >::value);
BOOST_TEST(boost::iterators::is_iterator< std::reverse_iterator< int* > >::value);
BOOST_TEST(boost::iterators::is_iterator< std::reverse_iterator< complete* > >::value);
BOOST_TEST(boost::iterators::is_iterator< adapted_iterator< int* > >::value);
BOOST_TEST(boost::iterators::is_iterator< std::string::iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::string::const_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::string::reverse_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::string::const_reverse_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::list< int >::iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::list< int >::const_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::list< int >::reverse_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::list< int >::const_reverse_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::vector< int >::iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::vector< int >::const_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::vector< int >::reverse_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::vector< int >::const_reverse_iterator >::value);
BOOST_TEST(boost::iterators::is_iterator< std::insert_iterator< std::vector< int > > >::value);
BOOST_TEST(boost::iterators::is_iterator< std::back_insert_iterator< std::vector< int > > >::value);
BOOST_TEST(boost::iterators::is_iterator< std::front_insert_iterator< std::vector< int > > >::value);
BOOST_TEST(boost::iterators::is_iterator< std::istream_iterator< int > >::value);
BOOST_TEST(boost::iterators::is_iterator< std::ostream_iterator< int > >::value);
BOOST_TEST(boost::iterators::is_iterator< std::istreambuf_iterator< char > >::value);
BOOST_TEST(boost::iterators::is_iterator< std::ostreambuf_iterator< char > >::value);
BOOST_TEST(!boost::iterators::is_iterator< int >::value);
BOOST_TEST(!boost::iterators::is_iterator< complete >::value);
BOOST_TEST(!boost::iterators::is_iterator< void >::value);
BOOST_TEST(!boost::iterators::is_iterator< const void >::value);
BOOST_TEST(!boost::iterators::is_iterator< void* >::value);
#if defined(BOOST_TT_HAS_WORKING_IS_COMPLETE)
BOOST_TEST(!boost::iterators::is_iterator< incomplete >::value);
BOOST_TEST(!boost::iterators::is_iterator< incomplete* >::value);
#endif
BOOST_TEST(!boost::iterators::is_iterator< int (int) >::value);
BOOST_TEST(!boost::iterators::is_iterator< int (*)(int) >::value);
BOOST_TEST(!boost::iterators::is_iterator< int complete::* >::value);
BOOST_TEST(!boost::iterators::is_iterator< int (complete::*)(int) >::value);
BOOST_TEST(!boost::iterators::is_iterator< int (complete::*)(int) const >::value);
#if defined(__cpp_noexcept_function_type) && (__cpp_noexcept_function_type >= 201510L)
BOOST_TEST(!boost::iterators::is_iterator< int (*)(int) noexcept >::value);
BOOST_TEST(!boost::iterators::is_iterator< int (complete::*)(int) noexcept >::value);
BOOST_TEST(!boost::iterators::is_iterator< int (complete::*)(int) const noexcept >::value);
#endif
BOOST_TEST(!boost::iterators::is_iterator< int[] >::value);
BOOST_TEST(!boost::iterators::is_iterator< int[10] >::value);
BOOST_TEST(!boost::iterators::is_iterator< int*[] >::value);
BOOST_TEST(!boost::iterators::is_iterator< int*[10] >::value);
BOOST_TEST(!boost::iterators::is_iterator< int& >::value);
BOOST_TEST(!boost::iterators::is_iterator< int*& >::value);
BOOST_TEST(!boost::iterators::is_iterator< int (&)(int) >::value);
BOOST_TEST(!boost::iterators::is_iterator< int (&)[10] >::value);
return boost::report_errors();
}
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