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3rdparty/boost_1_81_0/boost/indirect_reference.hpp 1.01 KB
63e88f80   Hu Chunming   提交三方库
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  #ifndef INDIRECT_REFERENCE_DWA200415_HPP
  # define INDIRECT_REFERENCE_DWA200415_HPP
  
  //
  // Copyright David Abrahams 2004. 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)
  //
  // typename indirect_reference<P>::type provides the type of *p.
  //
  // http://www.boost.org/libs/iterator/doc/pointee.html
  //
  
  # include <boost/detail/is_incrementable.hpp>
  # include <boost/iterator/iterator_traits.hpp>
  # include <boost/type_traits/remove_cv.hpp>
  # include <boost/mpl/eval_if.hpp>
  # include <boost/pointee.hpp>
  
  namespace boost {
  
  namespace detail
  {
    template <class P>
    struct smart_ptr_reference
    {
        typedef typename boost::pointee<P>::type& type;
    };
  }
  
  template <class P>
  struct indirect_reference
    : mpl::eval_if<
          detail::is_incrementable<P>
        , iterator_reference<P>
        , detail::smart_ptr_reference<P>
      >
  {
  };
  
  } // namespace boost
  
  #endif // INDIRECT_REFERENCE_DWA200415_HPP