boost/boost/type_traits/remove_volatile.hpp

   1
   2 // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
   3 // Hinnant & John Maddock 2000.  Permission to copy, use, modify,
   4 // sell and distribute this software is granted provided this
   5 // copyright notice appears in all copies. This software is provided
   6 // "as is" without express or implied warranty, and with no claim as
   7 // to its suitability for any purpose.
   8 //
   9 // See http://www.boost.org for most recent version including documentation.
  10
  11 #ifndef BOOST_TT_REMOVE_VOLATILE_HPP_INCLUDED
  12 #define BOOST_TT_REMOVE_VOLATILE_HPP_INCLUDED
  13
  14 #include "boost/type_traits/is_const.hpp"
  15 #include "boost/type_traits/broken_compiler_spec.hpp"
  16 #include "boost/type_traits/detail/cv_traits_impl.hpp"
  17 #include "boost/config.hpp"
  18
  19 #include <cstddef>
  20
  21 // should be the last #include
  22 #include "boost/type_traits/detail/type_trait_def.hpp"
  23
  24 namespace boost {
  25
  26 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
  27
  28 namespace detail {
  29
  30 template <typename T, bool is_const>
  31 struct remove_volatile_helper
  32 {
  33     typedef T type;
  34 };
  35
  36 template <typename T>
  37 struct remove_volatile_helper<T,true>
  38 {
  39     typedef T const type;
  40 };
  41
  42 template <typename T>
  43 struct remove_volatile_impl
  44 {
  45     typedef typename remove_volatile_helper<
  46           typename cv_traits_imp<T*>::unqualified_type
  47         , ::boost::is_const<T>::value
  48         >::type type;
  49 };
  50
  51 } // namespace detail
  52
  53 // * convert a type T to a non-volatile type - remove_volatile<T>
  54
  55 BOOST_TT_AUX_TYPE_TRAIT_DEF1(remove_volatile,T,typename detail::remove_volatile_impl<T>::type)
  56 BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_1(typename T,remove_volatile,T&,T&)
  57 BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_2(typename T,std::size_t N,remove_volatile,T volatile[N],T type[N])
  58 BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_2(typename T,std::size_t N,remove_volatile,T const volatile[N],T const type[N])
  59
  60 #else
  61
  62 // doesn't work
  63 BOOST_TT_AUX_TYPE_TRAIT_DEF1(remove_volatile,T,T)
  64
  65 #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
  66
  67 } // namespace boost
  68
  69 #include "boost/type_traits/detail/type_trait_undef.hpp"
  70
  71 #endif // BOOST_TT_REMOVE_VOLATILE_HPP_INCLUDED