source: NonGTP/Boost/boost/mpl/aux_/integral_wrapper.hpp @ 857

Revision 857, 3.6 KB checked in by igarcia, 19 years ago (diff)
Line 
1
2// Copyright Aleksey Gurtovoy 2000-2004
3//
4// Distributed under the Boost Software License, Version 1.0.
5// (See accompanying file LICENSE_1_0.txt or copy at
6// http://www.boost.org/LICENSE_1_0.txt)
7//
8// See http://www.boost.org/libs/mpl for documentation.
9
10// $Source: /cvsroot/boost/boost/boost/mpl/aux_/integral_wrapper.hpp,v $
11// $Date: 2004/09/02 15:40:43 $
12// $Revision: 1.10 $
13
14// NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION!
15
16#include <boost/mpl/integral_c_tag.hpp>
17#include <boost/mpl/aux_/static_cast.hpp>
18#include <boost/mpl/aux_/nttp_decl.hpp>
19#include <boost/mpl/aux_/config/static_constant.hpp>
20#include <boost/mpl/aux_/config/workaround.hpp>
21
22#include <boost/preprocessor/cat.hpp>
23
24#if !defined(AUX_WRAPPER_NAME)
25#   define AUX_WRAPPER_NAME BOOST_PP_CAT(AUX_WRAPPER_VALUE_TYPE,_)
26#endif
27
28#if !defined(AUX_WRAPPER_PARAMS)
29#   define AUX_WRAPPER_PARAMS(N) BOOST_MPL_AUX_NTTP_DECL(AUX_WRAPPER_VALUE_TYPE, N)
30#endif
31
32#if !defined(AUX_WRAPPER_INST)
33#   if BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
34#       define AUX_WRAPPER_INST(value) AUX_WRAPPER_NAME< value >
35#   else
36#       define AUX_WRAPPER_INST(value) BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::AUX_WRAPPER_NAME< value >
37#   endif
38#endif
39
40BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
41
42template< AUX_WRAPPER_PARAMS(N) >
43struct AUX_WRAPPER_NAME
44{
45    BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, value = N);
46// agurt, 08/mar/03: SGI MIPSpro C++ workaround, have to #ifdef because some
47// other compilers (e.g. MSVC) are not particulary happy about it
48#if BOOST_WORKAROUND(__EDG_VERSION__, <= 238)
49    typedef struct AUX_WRAPPER_NAME type;
50#else
51    typedef AUX_WRAPPER_NAME type;
52#endif
53    typedef AUX_WRAPPER_VALUE_TYPE value_type;
54    typedef integral_c_tag tag;
55
56// have to #ifdef here: some compilers don't like the 'N + 1' form (MSVC),
57// while some other don't like 'value + 1' (Borland), and some don't like
58// either
59#if BOOST_WORKAROUND(__EDG_VERSION__, <= 243)
60 private:
61    BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, next_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1)));
62    BOOST_STATIC_CONSTANT(AUX_WRAPPER_VALUE_TYPE, prior_value = BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1)));
63 public:
64    typedef AUX_WRAPPER_INST(next_value) next;
65    typedef AUX_WRAPPER_INST(prior_value) prior;
66#elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561)) \
67    || BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(502)) \
68    || BOOST_WORKAROUND(__HP_aCC, BOOST_TESTED_AT(53800))
69    typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N + 1)) ) next;
70    typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (N - 1)) ) prior;
71#else
72    typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value + 1)) ) next;
73    typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value - 1)) ) prior;
74#endif
75
76    // enables uniform function call syntax for families of overloaded
77    // functions that return objects of both arithmetic ('int', 'long',
78    // 'double', etc.) and wrapped integral types (for an example, see
79    // "mpl/example/power.cpp")
80    operator AUX_WRAPPER_VALUE_TYPE() const { return static_cast<AUX_WRAPPER_VALUE_TYPE>(this->value); }
81};
82
83#if !defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION)
84template< AUX_WRAPPER_PARAMS(N) >
85AUX_WRAPPER_VALUE_TYPE const AUX_WRAPPER_INST(N)::value;
86#endif
87
88BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
89
90#undef AUX_WRAPPER_NAME
91#undef AUX_WRAPPER_PARAMS
92#undef AUX_WRAPPER_INST
93#undef AUX_WRAPPER_VALUE_TYPE
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