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6c62f31f0a
immutability of the pointed-to type via const qualification. The pointee of a proxy-based iterator will be const qualified unless a mutable reference to the value_type can be bound to the returned proxy. Added a test for pointee Fixed iterator_facade so operator[] result type computation didn't cause a problem with abstract types. Updated iterator_facade operator[] docs for accuracy. Allowed Borland to simply fail the indirect_iterator_member_types test because of its lame const-dropping, instead of trying to work around it. [SVN r21579]
73 lines
2.4 KiB
C++
Executable File
73 lines
2.4 KiB
C++
Executable File
// Copyright David Abrahams 2004. 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 <boost/pointee.hpp>
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#include <boost/type_traits/add_const.hpp>
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#include "static_assert_same.hpp"
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#include <memory>
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#include <list>
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template <class T, class Ref>
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struct proxy_ptr
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{
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typedef T element_type;
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struct proxy
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{
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operator Ref() const;
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};
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proxy operator*() const;
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};
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template <class T>
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struct proxy_ref_ptr : proxy_ptr<T,T&>
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{
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};
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template <class T>
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struct proxy_value_ptr : proxy_ptr<T,T>
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{
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typedef typename boost::add_const<T>::type element_type;
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};
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struct X {
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template <class T> X(T const&);
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template <class T> operator T&() const;
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};
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BOOST_TT_BROKEN_COMPILER_SPEC(X)
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int main()
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{
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STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<int> >::type, int);
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STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<X> >::type, X);
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STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<int const> >::type, int const);
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STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<X const> >::type, X const);
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STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<int> >::type, int const);
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STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<X> >::type, X const);
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STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<int const> >::type, int const);
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STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<X const> >::type, X const);
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STATIC_ASSERT_SAME(boost::pointee<int*>::type, int);
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STATIC_ASSERT_SAME(boost::pointee<int const*>::type, int const);
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STATIC_ASSERT_SAME(boost::pointee<X*>::type, X);
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STATIC_ASSERT_SAME(boost::pointee<X const*>::type, X const);
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STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<int> >::type, int);
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STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<X> >::type, X);
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STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<int const> >::type, int const);
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STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<X const> >::type, X const);
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STATIC_ASSERT_SAME(boost::pointee<std::list<int>::iterator >::type, int);
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STATIC_ASSERT_SAME(boost::pointee<std::list<X>::iterator >::type, X);
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STATIC_ASSERT_SAME(boost::pointee<std::list<int>::const_iterator >::type, int const);
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STATIC_ASSERT_SAME(boost::pointee<std::list<X>::const_iterator >::type, X const);
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return 0;
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}
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