Add files necessary for use of dynamic_bitset
[dyninst.git] / external / boost / static_assert.hpp
1 //  (C) Copyright John Maddock 2000.
2 //  Use, modification and distribution are subject to the 
3 //  Boost Software License, Version 1.0. (See accompanying file 
4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5
6 //  See http://www.boost.org/libs/static_assert for documentation.
7
8 /*
9  Revision history:
10    02 August 2000
11       Initial version.
12 */
13
14 #ifndef BOOST_STATIC_ASSERT_HPP
15 #define BOOST_STATIC_ASSERT_HPP
16
17 #include <boost/config.hpp>
18 #include <boost/detail/workaround.hpp>
19
20 #ifdef __BORLANDC__
21 //
22 // workaround for buggy integral-constant expression support:
23 #define BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS
24 #endif
25
26 #if defined(__GNUC__) && (__GNUC__ == 3) && ((__GNUC_MINOR__ == 3) || (__GNUC_MINOR__ == 4))
27 // gcc 3.3 and 3.4 don't produce good error messages with the default version:
28 #  define BOOST_SA_GCC_WORKAROUND
29 #endif
30
31 namespace boost{
32
33 // HP aCC cannot deal with missing names for template value parameters
34 template <bool x> struct STATIC_ASSERTION_FAILURE;
35
36 template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; };
37
38 // HP aCC cannot deal with missing names for template value parameters
39 template<int x> struct static_assert_test{};
40
41 }
42
43 //
44 // Implicit instantiation requires that all member declarations be
45 // instantiated, but that the definitions are *not* instantiated.
46 //
47 // It's not particularly clear how this applies to enum's or typedefs;
48 // both are described as declarations [7.1.3] and [7.2] in the standard,
49 // however some compilers use "delayed evaluation" of one or more of
50 // these when implicitly instantiating templates.  We use typedef declarations
51 // by default, but try defining BOOST_USE_ENUM_STATIC_ASSERT if the enum
52 // version gets better results from your compiler...
53 //
54 // Implementation:
55 // Both of these versions rely on sizeof(incomplete_type) generating an error
56 // message containing the name of the incomplete type.  We use
57 // "STATIC_ASSERTION_FAILURE" as the type name here to generate
58 // an eye catching error message.  The result of the sizeof expression is either
59 // used as an enum initialiser, or as a template argument depending which version
60 // is in use...
61 // Note that the argument to the assert is explicitly cast to bool using old-
62 // style casts: too many compilers currently have problems with static_cast
63 // when used inside integral constant expressions.
64 //
65 #if !defined(BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS)
66
67 #if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
68 // __LINE__ macro broken when -ZI is used see Q199057
69 // fortunately MSVC ignores duplicate typedef's.
70 #define BOOST_STATIC_ASSERT( B ) \
71    typedef ::boost::static_assert_test<\
72       sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >)\
73       > boost_static_assert_typedef_
74 #elif defined(BOOST_MSVC)
75 #define BOOST_STATIC_ASSERT( B ) \
76    typedef ::boost::static_assert_test<\
77       sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >)>\
78          BOOST_JOIN(boost_static_assert_typedef_, __COUNTER__)
79 #elif defined(BOOST_INTEL_CXX_VERSION) || defined(BOOST_SA_GCC_WORKAROUND)
80 // agurt 15/sep/02: a special care is needed to force Intel C++ issue an error 
81 // instead of warning in case of failure
82 # define BOOST_STATIC_ASSERT( B ) \
83     typedef char BOOST_JOIN(boost_static_assert_typedef_, __LINE__) \
84         [ ::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >::value ]
85 #elif defined(__sgi)
86 // special version for SGI MIPSpro compiler
87 #define BOOST_STATIC_ASSERT( B ) \
88    BOOST_STATIC_CONSTANT(bool, \
89      BOOST_JOIN(boost_static_assert_test_, __LINE__) = ( B )); \
90    typedef ::boost::static_assert_test<\
91      sizeof(::boost::STATIC_ASSERTION_FAILURE< \
92        BOOST_JOIN(boost_static_assert_test_, __LINE__) >)>\
93          BOOST_JOIN(boost_static_assert_typedef_, __LINE__)
94 #elif BOOST_WORKAROUND(__MWERKS__, <= 0x3003)
95 // special version for CodeWarrior <= 8.x
96 #define BOOST_STATIC_ASSERT( B ) \
97    BOOST_STATIC_CONSTANT(int, \
98      BOOST_JOIN(boost_static_assert_test_, __LINE__) = \
99        sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >) )
100 #else
101 // generic version
102 #define BOOST_STATIC_ASSERT( B ) \
103    typedef ::boost::static_assert_test<\
104       sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >)>\
105          BOOST_JOIN(boost_static_assert_typedef_, __LINE__)
106 #endif
107
108 #else
109 // alternative enum based implementation:
110 #define BOOST_STATIC_ASSERT( B ) \
111    enum { BOOST_JOIN(boost_static_assert_enum_, __LINE__) \
112       = sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >) }
113 #endif
114
115
116 #endif // BOOST_STATIC_ASSERT_HPP
117
118