boost/type_traits/is_scalar.hpp

   1
   2 //  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6 //
   7 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
   8
   9 #ifndef BOOST_TT_IS_SCALAR_HPP_INCLUDED
  10 #define BOOST_TT_IS_SCALAR_HPP_INCLUDED
  11
  12 #include <boost/type_traits/is_arithmetic.hpp>
  13 #include <boost/type_traits/is_enum.hpp>
  14 #include <boost/type_traits/is_pointer.hpp>
  15 #include <boost/type_traits/is_member_pointer.hpp>
  16 #include <boost/type_traits/detail/ice_or.hpp>
  17 #include <boost/config.hpp>
  18
  19 // should be the last #include
  20 #include <boost/type_traits/detail/bool_trait_def.hpp>
  21
  22 namespace boost {
  23
  24 namespace detail {
  25
  26 template <typename T>
  27 struct is_scalar_impl
  28 {
  29    BOOST_STATIC_CONSTANT(bool, value =
  30       (::boost::type_traits::ice_or<
  31          ::boost::is_arithmetic<T>::value,
  32          ::boost::is_enum<T>::value,
  33          ::boost::is_pointer<T>::value,
  34          ::boost::is_member_pointer<T>::value
  35       >::value));
  36 };
  37
  38 // these specializations are only really needed for compilers
  39 // without partial specialization support:
  40 template <> struct is_scalar_impl<void>{ BOOST_STATIC_CONSTANT(bool, value = false ); };
  41 #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
  42 template <> struct is_scalar_impl<void const>{ BOOST_STATIC_CONSTANT(bool, value = false ); };
  43 template <> struct is_scalar_impl<void volatile>{ BOOST_STATIC_CONSTANT(bool, value = false ); };
  44 template <> struct is_scalar_impl<void const volatile>{ BOOST_STATIC_CONSTANT(bool, value = false ); };
  45 #endif
  46
  47 } // namespace detail
  48
  49 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_scalar,T,::boost::detail::is_scalar_impl<T>::value)
  50
  51 } // namespace boost
  52
  53 #include <boost/type_traits/detail/bool_trait_undef.hpp>
  54
  55 #endif // BOOST_TT_IS_SCALAR_HPP_INCLUDED