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// Copyright David Abrahams 2003. 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)
#include <deque>
#include <iterator>
#include <cstddef> // std::ptrdiff_t
#include <boost/noncopyable.hpp>
#include <boost/iterator/is_lvalue_iterator.hpp>
struct v
{
v();
~v();
};
struct value_iterator
{
typedef std::input_iterator_tag iterator_category;
typedef v value_type;
typedef std::ptrdiff_t difference_type;
typedef v* pointer;
typedef v& reference;
v operator*() const;
};
struct noncopyable_iterator
{
typedef std::forward_iterator_tag iterator_category;
typedef boost::noncopyable value_type;
typedef std::ptrdiff_t difference_type;
typedef boost::noncopyable* pointer;
typedef boost::noncopyable& reference;
boost::noncopyable const& operator*() const;
};
template <class 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 <class 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 <class 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);
};
int main()
{
static_assert(boost::is_lvalue_iterator<v*>::value,
"boost::is_lvalue_iterator<v*>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<v const*>::value,
"boost::is_lvalue_iterator<v const*>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<std::deque<v>::iterator>::value,
"boost::is_lvalue_iterator<std::deque<v>::iterator>::value.");
static_assert(boost::is_lvalue_iterator<std::deque<v>::const_iterator>::value,
"boost::is_lvalue_iterator<std::deque<v>::const_iterator>::value is expected to be true.");
static_assert(!boost::is_lvalue_iterator<std::back_insert_iterator<std::deque<v>>>::value,
"boost::is_lvalue_iterator<std::back_insert_iterator<std::deque<v>>>::value is expected to be false.");
static_assert(!boost::is_lvalue_iterator<std::ostream_iterator<v>>::value,
"boost::is_lvalue_iterator<std::ostream_iterator<v>>::value is expected to be false.");
static_assert(!boost::is_lvalue_iterator<proxy_iterator<v>>::value,
"boost::is_lvalue_iterator<proxy_iterator<v>>::value is expected to be false.");
static_assert(!boost::is_lvalue_iterator<proxy_iterator<int>>::value,
"boost::is_lvalue_iterator<proxy_iterator<int>>::value is expected to be false.");
static_assert(!boost::is_lvalue_iterator<value_iterator>::value,
"boost::is_lvalue_iterator<value_iterator>::value is expected to be false.");
// Make sure inaccessible copy constructor doesn't prevent
// reference binding
static_assert(boost::is_lvalue_iterator<noncopyable_iterator>::value,
"boost::is_lvalue_iterator<noncopyable_iterator>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<lvalue_iterator<v>>::value,
"boost::is_lvalue_iterator<lvalue_iterator<v>>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<lvalue_iterator<int>>::value,
"boost::is_lvalue_iterator<lvalue_iterator<int>>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<lvalue_iterator<char*>>::value,
"boost::is_lvalue_iterator<lvalue_iterator<char*>>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<lvalue_iterator<float>>::value,
"boost::is_lvalue_iterator<lvalue_iterator<float>>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<constant_lvalue_iterator<v>>::value,
"boost::is_lvalue_iterator<constant_lvalue_iterator<v>>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<constant_lvalue_iterator<int>>::value,
"boost::is_lvalue_iterator<constant_lvalue_iterator<int>>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<constant_lvalue_iterator<char*>>::value,
"boost::is_lvalue_iterator<constant_lvalue_iterator<char*>>::value is expected to be true.");
static_assert(boost::is_lvalue_iterator<constant_lvalue_iterator<float>>::value,
"boost::is_lvalue_iterator<constant_lvalue_iterator<float>>::value is expected to be true.");
static_assert(boost::is_non_const_lvalue_iterator<v*>::value,
"boost::is_non_const_lvalue_iterator<v*>::value is expected to be true.");
static_assert(!boost::is_non_const_lvalue_iterator<v const*>::value,
"boost::is_non_const_lvalue_iterator<v const*>::value is expected to be false.");
static_assert(boost::is_non_const_lvalue_iterator<std::deque<v>::iterator>::value,
"boost::is_non_const_lvalue_iterator<std::deque<v>::iterator>::value is expected to be true.");
static_assert(!boost::is_non_const_lvalue_iterator<std::deque<v>::const_iterator>::value,
"boost::is_non_const_lvalue_iterator<std::deque<v>::const_iterator>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<std::back_insert_iterator<std::deque<v>>>::value,
"boost::is_non_const_lvalue_iterator<std::back_insert_iterator<std::deque<v>>>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<std::ostream_iterator<v>>::value,
"boost::is_non_const_lvalue_iterator<std::ostream_iterator<v>>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<proxy_iterator<v>>::value,
"boost::is_non_const_lvalue_iterator<proxy_iterator<v>>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<proxy_iterator<int>>::value,
"boost::is_non_const_lvalue_iterator<proxy_iterator<int>>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<value_iterator>::value,
"boost::is_non_const_lvalue_iterator<value_iterator>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<noncopyable_iterator>::value,
"boost::is_non_const_lvalue_iterator<noncopyable_iterator>::value is expected to be false.");
static_assert(boost::is_non_const_lvalue_iterator<lvalue_iterator<v>>::value,
"boost::is_non_const_lvalue_iterator<lvalue_iterator<v>>::value is expected to be true.");
static_assert(boost::is_non_const_lvalue_iterator<lvalue_iterator<int>>::value,
"boost::is_non_const_lvalue_iterator<lvalue_iterator<int>>::value is expected to be true.");
static_assert(boost::is_non_const_lvalue_iterator<lvalue_iterator<char*>>::value,
"boost::is_non_const_lvalue_iterator<lvalue_iterator<char*>>::value is expected to be true.");
static_assert(boost::is_non_const_lvalue_iterator<lvalue_iterator<float>>::value,
"boost::is_non_const_lvalue_iterator<lvalue_iterator<float>>::value is expected to be true.");
static_assert(!boost::is_non_const_lvalue_iterator<constant_lvalue_iterator<v>>::value,
"boost::is_non_const_lvalue_iterator<constant_lvalue_iterator<v>>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<constant_lvalue_iterator<int>>::value,
"boost::is_non_const_lvalue_iterator<constant_lvalue_iterator<int>>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<constant_lvalue_iterator<char*>>::value,
"boost::is_non_const_lvalue_iterator<constant_lvalue_iterator<char*>>::value is expected to be false.");
static_assert(!boost::is_non_const_lvalue_iterator<constant_lvalue_iterator<float>>::value,
"boost::is_non_const_lvalue_iterator<constant_lvalue_iterator<float>>::value is expected to be false.");
return 0;
}
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