ceph/src/boost/libs/function_types/include/boost/function_types/parameter_types.hpp

   1
   2 // (C) Copyright Tobias Schwinger
   3 //
   4 // Use modification and distribution are subject to the boost Software License,
   5 // Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt).
   6
   7 //------------------------------------------------------------------------------
   8
   9 #ifndef BOOST_FT_PARAMETER_TYPES_HPP_INCLUDED
  10 #define BOOST_FT_PARAMETER_TYPES_HPP_INCLUDED
  11
  12 #include <boost/blank.hpp>
  13 #include <boost/mpl/if.hpp>
  14
  15 #include <boost/mpl/aux_/lambda_support.hpp>
  16
  17 #include <boost/mpl/pop_front.hpp>
  18
  19 #include <boost/function_types/is_callable_builtin.hpp>
  20 #include <boost/function_types/components.hpp>
  21
  22 namespace boost
  23 {
  24   namespace function_types
  25   {
  26     using mpl::placeholders::_;
  27
  28     template< typename T, typename ClassTypeTransform = add_reference<_> >
  29     struct parameter_types;
  30
  31     namespace detail
  32     {
  33       template<typename T, typename ClassTypeTransform>
  34       struct parameter_types_impl
  35         : mpl::pop_front
  36           < typename function_types::components<T,ClassTypeTransform>::types
  37           >::type
  38       { };
  39     }
  40
  41     template<typename T, typename ClassTypeTransform> struct parameter_types
  42       : mpl::if_
  43         < function_types::is_callable_builtin<T>
  44         , detail::parameter_types_impl<T,ClassTypeTransform>, boost::blank
  45         >::type
  46     {
  47       BOOST_MPL_AUX_LAMBDA_SUPPORT(2,parameter_types,(T,ClassTypeTransform))
  48     };
  49   }
  50 }
  51
  52 #endif
  53