boost/type_traits/add_const.hpp

   1
   2 //  (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
   3 //  Hinnant & John Maddock 2000.
   4 //  Use, modification and distribution are subject to the Boost Software License,
   5 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 //  http://www.boost.org/LICENSE_1_0.txt).
   7 //
   8 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
   9
  10 #ifndef BOOST_TT_ADD_CONST_HPP_INCLUDED
  11 #define BOOST_TT_ADD_CONST_HPP_INCLUDED
  12
  13 #include <boost/config.hpp>
  14
  15 // should be the last #include
  16 #include <boost/type_traits/detail/type_trait_def.hpp>
  17
  18 namespace boost {
  19
  20 // * convert a type T to const type - add_const<T>
  21 // this is not required since the result is always
  22 // the same as "T const", but it does suppress warnings
  23 // from some compilers:
  24
  25 #if defined(BOOST_MSVC)
  26 // This bogus warning will appear when add_const is applied to a
  27 // const volatile reference because we can't detect const volatile
  28 // references with MSVC6.
  29 #   pragma warning(push)
  30 #   pragma warning(disable:4181) // warning C4181: qualifier applied to reference type ignored
  31 #endif
  32
  33 BOOST_TT_AUX_TYPE_TRAIT_DEF1(add_const,T,T const)
  34
  35 #if defined(BOOST_MSVC)
  36 #   pragma warning(pop)
  37 #endif
  38
  39 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
  40 BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_1(typename T,add_const,T&,T&)
  41 #endif
  42
  43 } // namespace boost
  44
  45 #include <boost/type_traits/detail/type_trait_undef.hpp>
  46
  47 #endif // BOOST_TT_ADD_CONST_HPP_INCLUDED