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3rdparty/boost_1_81_0/boost/get_pointer.hpp 2.23 KB
63e88f80   Hu Chunming   提交三方库
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  // Copyright Peter Dimov and David Abrahams 2002.
  // Distributed under 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)
  #ifndef GET_POINTER_DWA20021219_HPP
  #define GET_POINTER_DWA20021219_HPP
  
  #include <boost/config.hpp>
  
  // In order to avoid circular dependencies with Boost.TR1
  // we make sure that our include of <memory> doesn't try to
  // pull in the TR1 headers: that's why we use this header 
  // rather than including <memory> directly:
  #include <boost/config/no_tr1/memory.hpp>  // std::auto_ptr
  
  namespace boost { 
  
  // get_pointer(p) extracts a ->* capable pointer from p
  
  template<class T> T * get_pointer(T * p)
  {
      return p;
  }
  
  // get_pointer(shared_ptr<T> const & p) has been moved to shared_ptr.hpp
  
  #if !defined( BOOST_NO_AUTO_PTR )
  
  #if defined( __GNUC__ ) && (defined( __GXX_EXPERIMENTAL_CXX0X__ ) || (__cplusplus >= 201103L))
  #if defined( BOOST_GCC )
  #if BOOST_GCC >= 40600
  #define BOOST_CORE_DETAIL_DISABLE_LIBSTDCXX_DEPRECATED_WARNINGS
  #endif // BOOST_GCC >= 40600
  #elif defined( __clang__ ) && defined( __has_warning )
  #if __has_warning("-Wdeprecated-declarations")
  #define BOOST_CORE_DETAIL_DISABLE_LIBSTDCXX_DEPRECATED_WARNINGS
  #endif // __has_warning("-Wdeprecated-declarations")
  #endif
  #endif // defined( __GNUC__ ) && (defined( __GXX_EXPERIMENTAL_CXX0X__ ) || (__cplusplus >= 201103L))
  
  #if defined( BOOST_CORE_DETAIL_DISABLE_LIBSTDCXX_DEPRECATED_WARNINGS )
  // Disable libstdc++ warnings about std::auto_ptr being deprecated in C++11 mode
  #pragma GCC diagnostic push
  #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
  #define BOOST_CORE_DETAIL_DISABLED_DEPRECATED_WARNINGS
  #endif
  
  template<class T> T * get_pointer(std::auto_ptr<T> const& p)
  {
      return p.get();
  }
  
  #if defined( BOOST_CORE_DETAIL_DISABLE_LIBSTDCXX_DEPRECATED_WARNINGS )
  #pragma GCC diagnostic pop
  #undef BOOST_CORE_DETAIL_DISABLE_LIBSTDCXX_DEPRECATED_WARNINGS
  #endif
  
  #endif // !defined( BOOST_NO_AUTO_PTR )
  
  #if !defined( BOOST_NO_CXX11_SMART_PTR )
  
  template<class T> T * get_pointer( std::unique_ptr<T> const& p )
  {
      return p.get();
  }
  
  template<class T> T * get_pointer( std::shared_ptr<T> const& p )
  {
      return p.get();
  }
  
  #endif
  
  } // namespace boost
  
  #endif // GET_POINTER_DWA20021219_HPP