1
2#if !defined(BOOST_PP_IS_ITERATING)
3
4///// header body
5
6#ifndef BOOST_MPL_QUOTE_HPP_INCLUDED
7#define BOOST_MPL_QUOTE_HPP_INCLUDED
8
9// Copyright Aleksey Gurtovoy 2000-2008
10//
11// Distributed under the Boost Software License, Version 1.0.
12// (See accompanying file LICENSE_1_0.txt or copy at
13// http://www.boost.org/LICENSE_1_0.txt)
14//
15// See http://www.boost.org/libs/mpl for documentation.
16
17// $Id$
18// $Date$
19// $Revision$
20
21#if !defined(BOOST_MPL_PREPROCESSING_MODE)
22# include <boost/mpl/void.hpp>
23# include <boost/mpl/aux_/has_type.hpp>
24#endif
25
26#include <boost/mpl/aux_/config/bcc.hpp>
27#include <boost/mpl/aux_/config/ttp.hpp>
28
29#if defined(BOOST_MPL_CFG_NO_TEMPLATE_TEMPLATE_PARAMETERS) \
30 && !defined(BOOST_MPL_CFG_BCC590_WORKAROUNDS)
31# define BOOST_MPL_CFG_NO_QUOTE_TEMPLATE
32#endif
33
34#if !defined(BOOST_MPL_CFG_NO_IMPLICIT_METAFUNCTIONS) \
35 && defined(BOOST_MPL_CFG_NO_HAS_XXX)
36# define BOOST_MPL_CFG_NO_IMPLICIT_METAFUNCTIONS
37#endif
38
39#include <boost/mpl/aux_/config/use_preprocessed.hpp>
40
41#if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
42 && !defined(BOOST_MPL_PREPROCESSING_MODE)
43
44# define BOOST_MPL_PREPROCESSED_HEADER quote.hpp
45# include <boost/mpl/aux_/include_preprocessed.hpp>
46
47#else
48
49# include <boost/mpl/limits/arity.hpp>
50# include <boost/mpl/aux_/preprocessor/params.hpp>
51# include <boost/mpl/aux_/config/ctps.hpp>
52# include <boost/mpl/aux_/config/workaround.hpp>
53
54# include <boost/preprocessor/iterate.hpp>
55# include <boost/preprocessor/cat.hpp>
56
57#if !defined(BOOST_MPL_CFG_NO_QUOTE_TEMPLATE)
58
59namespace boost { namespace mpl {
60
61#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
62
63template< typename T, bool has_type_ >
64struct quote_impl
65// GCC has a problem with metafunction forwarding when T is a
66// specialization of a template called 'type'.
67# if BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4)) \
68 && BOOST_WORKAROUND(__GNUC_MINOR__, BOOST_TESTED_AT(0)) \
69 && BOOST_WORKAROUND(__GNUC_PATCHLEVEL__, BOOST_TESTED_AT(2))
70{
71 typedef typename T::type type;
72};
73# else
74 : T
75{
76};
77# endif
78
79template< typename T >
80struct quote_impl<T,false>
81{
82 typedef T type;
83};
84
85#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
86
87template< bool > struct quote_impl
88{
89 template< typename T > struct result_
90 : T
91 {
92 };
93};
94
95template<> struct quote_impl<false>
96{
97 template< typename T > struct result_
98 {
99 typedef T type;
100 };
101};
102
103#endif
104
105#define BOOST_PP_ITERATION_PARAMS_1 \
106 (3,(1, BOOST_MPL_LIMIT_METAFUNCTION_ARITY, <boost/mpl/quote.hpp>))
107#include BOOST_PP_ITERATE()
108
109}}
110
111#endif // BOOST_MPL_CFG_NO_QUOTE_TEMPLATE
112
113#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
114#endif // BOOST_MPL_QUOTE_HPP_INCLUDED
115
116///// iteration
117
118#else
119#define i_ BOOST_PP_FRAME_ITERATION(1)
120
121template<
122 template< BOOST_MPL_PP_PARAMS(i_, typename P) > class F
123 , typename Tag = void_
124 >
125struct BOOST_PP_CAT(quote,i_)
126{
127 template< BOOST_MPL_PP_PARAMS(i_, typename U) > struct apply
128#if defined(BOOST_MPL_CFG_BCC590_WORKAROUNDS)
129 {
130 typedef typename quote_impl<
131 F< BOOST_MPL_PP_PARAMS(i_, U) >
132 , aux::has_type< F< BOOST_MPL_PP_PARAMS(i_, U) > >::value
133 >::type type;
134 };
135#elif !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
136 : quote_impl<
137 F< BOOST_MPL_PP_PARAMS(i_, U) >
138 , aux::has_type< F< BOOST_MPL_PP_PARAMS(i_, U) > >::value
139 >
140 {
141 };
142#else
143 : quote_impl< aux::has_type< F< BOOST_MPL_PP_PARAMS(i_, U) > >::value >
144 ::template result_< F< BOOST_MPL_PP_PARAMS(i_, U) > >
145 {
146 };
147#endif
148};
149
150#undef i_
151#endif // BOOST_PP_IS_ITERATING
152

source code of include/boost/mpl/quote.hpp