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88 lines
3.2 KiB
C++
Executable File
88 lines
3.2 KiB
C++
Executable File
// Copyright David Abrahams 2003. Use, modification and distribution is
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// subject to the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <deque>
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#include <iterator>
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#include <iostream>
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#include <boost/static_assert.hpp>
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#include <boost/noncopyable.hpp>
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#include <boost/type_traits/broken_compiler_spec.hpp>
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#include <boost/iterator/is_lvalue_iterator.hpp>
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#include <boost/iterator.hpp>
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// Last, for BOOST_NO_LVALUE_RETURN_DETECTION
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#include <boost/iterator/detail/config_def.hpp>
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struct v
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{
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v();
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~v();
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};
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BOOST_TT_BROKEN_COMPILER_SPEC(v)
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struct value_iterator : boost::iterator<std::input_iterator_tag,v>
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{
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v operator*() const;
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};
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struct noncopyable_iterator : boost::iterator<std::forward_iterator_tag,boost::noncopyable>
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{
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boost::noncopyable const& operator*() const;
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};
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struct proxy_iterator : boost::iterator<std::output_iterator_tag,v>
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{
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#if BOOST_WORKAROUND(__GNUC__, == 2)
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typedef boost::iterator<std::input_iterator_tag,v> base;
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typedef base::iterator_category iterator_category;
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typedef base::value_type value_type;
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typedef base::difference_type difference_type;
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typedef base::pointer pointer;
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typedef base::reference reference;
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#endif
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struct proxy
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{
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operator v&() const;
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proxy& operator=(v) const;
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};
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proxy operator*() const;
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};
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BOOST_TT_BROKEN_COMPILER_SPEC(proxy_iterator::proxy)
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int main()
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{
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BOOST_STATIC_ASSERT(boost::is_lvalue_iterator<v*>::value);
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BOOST_STATIC_ASSERT(boost::is_lvalue_iterator<v const*>::value);
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BOOST_STATIC_ASSERT(boost::is_lvalue_iterator<std::deque<v>::iterator>::value);
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BOOST_STATIC_ASSERT(boost::is_lvalue_iterator<std::deque<v>::const_iterator>::value);
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BOOST_STATIC_ASSERT(!boost::is_lvalue_iterator<std::back_insert_iterator<std::deque<v> > >::value);
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BOOST_STATIC_ASSERT(!boost::is_lvalue_iterator<std::ostream_iterator<v> >::value);
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BOOST_STATIC_ASSERT(!boost::is_lvalue_iterator<proxy_iterator>::value);
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#ifndef BOOST_NO_LVALUE_RETURN_DETECTION
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BOOST_STATIC_ASSERT(!boost::is_lvalue_iterator<value_iterator>::value);
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#endif
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// Make sure inaccessible copy constructor doesn't prevent
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// reference binding
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BOOST_STATIC_ASSERT(boost::is_lvalue_iterator<noncopyable_iterator>::value);
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BOOST_STATIC_ASSERT(boost::is_mutable_lvalue_iterator<v*>::value);
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BOOST_STATIC_ASSERT(!boost::is_mutable_lvalue_iterator<v const*>::value);
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BOOST_STATIC_ASSERT(boost::is_mutable_lvalue_iterator<std::deque<v>::iterator>::value);
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BOOST_STATIC_ASSERT(!boost::is_mutable_lvalue_iterator<std::deque<v>::const_iterator>::value);
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BOOST_STATIC_ASSERT(!boost::is_mutable_lvalue_iterator<std::back_insert_iterator<std::deque<v> > >::value);
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BOOST_STATIC_ASSERT(!boost::is_mutable_lvalue_iterator<std::ostream_iterator<v> >::value);
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BOOST_STATIC_ASSERT(!boost::is_mutable_lvalue_iterator<proxy_iterator>::value);
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#ifndef BOOST_NO_LVALUE_RETURN_DETECTION
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BOOST_STATIC_ASSERT(!boost::is_mutable_lvalue_iterator<value_iterator>::value);
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#endif
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BOOST_STATIC_ASSERT(!boost::is_mutable_lvalue_iterator<noncopyable_iterator>::value);
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return 0;
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}
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