ceph/src/boost/boost/parameter/aux_/parenthesized_type.hpp

   1 // Copyright David Abrahams 2006. Distributed under the Boost
   2 // Software License, Version 1.0. (See accompanying
   3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   4 #ifndef BOOST_PARAMETER_AUX_PARENTHESIZED_TYPE_DWA2006414_HPP
   5 # define BOOST_PARAMETER_AUX_PARENTHESIZED_TYPE_DWA2006414_HPP
   6
   7 # include <boost/config.hpp>
   8 # include <boost/detail/workaround.hpp>
   9
  10 namespace boost { namespace parameter { namespace aux {
  11
  12 // A macro that takes a parenthesized C++ type name (T) and transforms
  13 // it into an un-parenthesized type expression equivalent to T.
  14 #  define BOOST_PARAMETER_PARENTHESIZED_TYPE(x)                    \
  15     boost::parameter::aux::unaryfunptr_arg_type< void(*)x >::type
  16
  17 // A metafunction that transforms void(*)(T) -> T
  18 template <class UnaryFunctionPointer>
  19 struct unaryfunptr_arg_type;
  20
  21 template <class Arg>
  22 struct unaryfunptr_arg_type<void(*)(Arg)>
  23 {
  24     typedef Arg type;
  25 };
  26
  27 template <>
  28 struct unaryfunptr_arg_type<void(*)(void)>
  29 {
  30     typedef void type;
  31 };
  32
  33 }}} // namespace boost::parameter::aux
  34
  35 #endif // BOOST_PARAMETER_AUX_PARENTHESIZED_TYPE_DWA2006414_HPP