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1 |
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2 #if !defined(BOOST_PP_IS_ITERATING) |
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3 |
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4 ///// header body |
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5 |
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6 #ifndef BOOST_MPL_ARG_HPP_INCLUDED |
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7 #define BOOST_MPL_ARG_HPP_INCLUDED |
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8 |
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9 // Copyright Peter Dimov 2001-2002 |
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10 // Copyright Aleksey Gurtovoy 2001-2004 |
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11 // |
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12 // Distributed under the Boost Software License, Version 1.0. |
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13 // (See accompanying file LICENSE_1_0.txt or copy at |
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14 // http://www.boost.org/LICENSE_1_0.txt) |
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15 // |
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16 // See http://www.boost.org/libs/mpl for documentation. |
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17 |
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18 // $Source: /cvsroot/boost/boost/boost/mpl/arg.hpp,v $ |
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19 // $Date: 2004/09/21 13:48:07 $ |
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20 // $Revision: 1.12 $ |
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21 |
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22 #if !defined(BOOST_MPL_PREPROCESSING_MODE) |
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23 # include <boost/mpl/arg_fwd.hpp> |
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24 # include <boost/mpl/aux_/na.hpp> |
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25 # include <boost/mpl/aux_/na_assert.hpp> |
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26 # include <boost/mpl/aux_/arity_spec.hpp> |
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27 # include <boost/mpl/aux_/arg_typedef.hpp> |
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28 #endif |
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29 |
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30 #include <boost/mpl/aux_/config/static_constant.hpp> |
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31 #include <boost/mpl/aux_/config/use_preprocessed.hpp> |
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32 |
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33 #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ |
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34 && !defined(BOOST_MPL_PREPROCESSING_MODE) |
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35 |
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36 # define BOOST_MPL_PREPROCESSED_HEADER arg.hpp |
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37 # include <boost/mpl/aux_/include_preprocessed.hpp> |
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38 |
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39 #else |
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40 |
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41 # include <boost/mpl/limits/arity.hpp> |
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42 # include <boost/mpl/aux_/preprocessor/default_params.hpp> |
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43 # include <boost/mpl/aux_/preprocessor/params.hpp> |
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44 # include <boost/mpl/aux_/config/lambda.hpp> |
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45 # include <boost/mpl/aux_/config/dtp.hpp> |
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46 # include <boost/mpl/aux_/nttp_decl.hpp> |
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47 |
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48 # include <boost/preprocessor/iterate.hpp> |
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49 # include <boost/preprocessor/inc.hpp> |
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50 # include <boost/preprocessor/cat.hpp> |
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51 |
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52 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN |
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53 |
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54 // local macro, #undef-ined at the end of the header |
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55 #if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES) |
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56 # define AUX778076_ARG_N_DEFAULT_PARAMS(param,value) \ |
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57 BOOST_MPL_PP_DEFAULT_PARAMS( \ |
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58 BOOST_MPL_LIMIT_METAFUNCTION_ARITY \ |
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59 , param \ |
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60 , value \ |
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61 ) \ |
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62 /**/ |
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63 #else |
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64 # define AUX778076_ARG_N_DEFAULT_PARAMS(param,value) \ |
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65 BOOST_MPL_PP_PARAMS( \ |
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66 BOOST_MPL_LIMIT_METAFUNCTION_ARITY \ |
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67 , param \ |
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68 ) \ |
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69 /**/ |
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70 #endif |
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71 |
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72 #define BOOST_PP_ITERATION_PARAMS_1 \ |
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73 (3,(0, BOOST_MPL_LIMIT_METAFUNCTION_ARITY, <boost/mpl/arg.hpp>)) |
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74 #include BOOST_PP_ITERATE() |
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75 |
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76 |
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77 # undef AUX778076_ARG_N_DEFAULT_PARAMS |
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78 |
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79 BOOST_MPL_AUX_NONTYPE_ARITY_SPEC(1,int,arg) |
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80 |
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81 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE |
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82 |
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83 #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS |
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84 #endif // BOOST_MPL_ARG_HPP_INCLUDED |
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85 |
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86 ///// iteration |
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87 |
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88 #else |
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89 #define i_ BOOST_PP_FRAME_ITERATION(1) |
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90 |
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91 #if i_ > 0 |
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92 |
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93 template<> struct arg<i_> |
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94 { |
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95 BOOST_STATIC_CONSTANT(int, value = i_); |
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96 typedef arg<BOOST_PP_INC(i_)> next; |
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97 BOOST_MPL_AUX_ARG_TYPEDEF(na, tag) |
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98 BOOST_MPL_AUX_ARG_TYPEDEF(na, type) |
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99 |
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100 template< |
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101 AUX778076_ARG_N_DEFAULT_PARAMS(typename U, na) |
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102 > |
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103 struct apply |
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104 { |
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105 typedef BOOST_PP_CAT(U,i_) type; |
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106 BOOST_MPL_AUX_ASSERT_NOT_NA(type); |
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107 }; |
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108 }; |
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109 |
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110 #else |
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111 |
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112 template<> struct arg<-1> |
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113 { |
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114 BOOST_STATIC_CONSTANT(int, value = -1); |
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115 BOOST_MPL_AUX_ARG_TYPEDEF(na, tag) |
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116 BOOST_MPL_AUX_ARG_TYPEDEF(na, type) |
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117 |
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118 template< |
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119 AUX778076_ARG_N_DEFAULT_PARAMS(typename U, na) |
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120 > |
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121 struct apply |
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122 { |
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123 typedef U1 type; |
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124 BOOST_MPL_AUX_ASSERT_NOT_NA(type); |
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125 }; |
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126 }; |
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127 |
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128 #endif // i_ > 0 |
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129 |
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130 #undef i_ |
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131 #endif // BOOST_PP_IS_ITERATING |