ceph/src/boost/libs/iterator/test/pointee.cpp

   1 // Copyright David Abrahams 2004. Use, modification and distribution is
   2 // subject to the Boost Software License, Version 1.0. (See accompanying
   3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   4
   5 #include <boost/pointee.hpp>
   6 #include <boost/type_traits/add_const.hpp>
   7 #include "static_assert_same.hpp"
   8 #include <memory>
   9 #include <list>
  10
  11 template <class T, class Ref>
  12 struct proxy_ptr
  13 {
  14     typedef T element_type;
  15     struct proxy
  16     {
  17         operator Ref() const;
  18     };
  19     proxy operator*() const;
  20 };
  21
  22 template <class T>
  23 struct proxy_ref_ptr : proxy_ptr<T,T&>
  24 {
  25 };
  26
  27 template <class T>
  28 struct proxy_value_ptr : proxy_ptr<T,T>
  29 {
  30     typedef typename boost::add_const<T>::type element_type;
  31 };
  32
  33 struct X {
  34     template <class T> X(T const&);
  35     template <class T> operator T&() const;
  36 };
  37
  38
  39 int main()
  40 {
  41     STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<int> >::type, int);
  42     STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<X> >::type, X);
  43
  44     STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<int const> >::type, int const);
  45     STATIC_ASSERT_SAME(boost::pointee<proxy_ref_ptr<X const> >::type, X const);
  46
  47     STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<int> >::type, int const);
  48     STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<X> >::type, X const);
  49
  50     STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<int const> >::type, int const);
  51     STATIC_ASSERT_SAME(boost::pointee<proxy_value_ptr<X const> >::type, X const);
  52
  53     STATIC_ASSERT_SAME(boost::pointee<int*>::type, int);
  54     STATIC_ASSERT_SAME(boost::pointee<int const*>::type, int const);
  55
  56     STATIC_ASSERT_SAME(boost::pointee<X*>::type, X);
  57     STATIC_ASSERT_SAME(boost::pointee<X const*>::type, X const);
  58
  59 #if defined(BOOST_NO_CXX11_SMART_PTR)
  60
  61     STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<int> >::type, int);
  62     STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<X> >::type, X);
  63
  64     STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<int const> >::type, int const);
  65     STATIC_ASSERT_SAME(boost::pointee<std::auto_ptr<X const> >::type, X const);
  66
  67 #else
  68
  69     STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<int> >::type, int);
  70     STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<X> >::type, X);
  71
  72     STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<int const> >::type, int const);
  73     STATIC_ASSERT_SAME(boost::pointee<std::unique_ptr<X const> >::type, X const);
  74
  75 #endif
  76
  77     STATIC_ASSERT_SAME(boost::pointee<std::list<int>::iterator >::type, int);
  78     STATIC_ASSERT_SAME(boost::pointee<std::list<X>::iterator >::type, X);
  79
  80     STATIC_ASSERT_SAME(boost::pointee<std::list<int>::const_iterator >::type, int const);
  81     STATIC_ASSERT_SAME(boost::pointee<std::list<X>::const_iterator >::type, X const);
  82     return 0;
  83 }