boost/type_traits/detail/type_trait_def.hpp

   1
   2 // NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION
   3
   4 // Copyright Aleksey Gurtovoy 2002-2004
   5 //
   6 // Distributed under the Boost Software License, Version 1.0.
   7 // (See accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9
  10 // $Source$
  11 // $Date: 2004-09-02 11:41:37 -0400 (Thu, 02 Sep 2004) $
  12 // $Revision: 24874 $
  13
  14 #include <boost/type_traits/detail/template_arity_spec.hpp>
  15 #include <boost/mpl/aux_/lambda_support.hpp>
  16
  17 #define BOOST_TT_AUX_TYPE_TRAIT_DEF1(trait,T,result) \
  18 template< typename T > struct trait \
  19 { \
  20     typedef result type; \
  21     BOOST_MPL_AUX_LAMBDA_SUPPORT(1,trait,(T)) \
  22 }; \
  23 \
  24 BOOST_TT_AUX_TEMPLATE_ARITY_SPEC(1,trait) \
  25 /**/
  26
  27 #define BOOST_TT_AUX_TYPE_TRAIT_SPEC1(trait,spec,result) \
  28 template<> struct trait<spec> \
  29 { \
  30     typedef result type; \
  31     BOOST_MPL_AUX_LAMBDA_SUPPORT_SPEC(1,trait,(spec)) \
  32 }; \
  33 /**/
  34
  35 #define BOOST_TT_AUX_TYPE_TRAIT_IMPL_SPEC1(trait,spec,result) \
  36 template<> struct trait##_impl<spec> \
  37 { \
  38     typedef result type; \
  39 }; \
  40 /**/
  41
  42 #define BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_1(param,trait,spec,result) \
  43 template< param > struct trait<spec> \
  44 { \
  45     typedef result type; \
  46 }; \
  47 /**/
  48
  49 #define BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_2(param1,param2,trait,spec,result) \
  50 template< param1, param2 > struct trait<spec> \
  51 { \
  52     typedef result; \
  53 }; \
  54 /**/
  55
  56 #define BOOST_TT_AUX_TYPE_TRAIT_IMPL_PARTIAL_SPEC1_1(param,trait,spec,result) \
  57 template< param > struct trait##_impl<spec> \
  58 { \
  59     typedef result type; \
  60 }; \
  61 /**/