ceph/src/boost/boost/optional/detail/optional_config.hpp

   1 // Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
   2 // Copyright (C) 2015 - 2017 Andrzej Krzemienski.
   3 //
   4 // Use, modification, and distribution is subject to the Boost Software
   5 // License, Version 1.0. (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/optional for documentation.
   9 //
  10 // You are welcome to contact the author at:
  11 //  akrzemi1@gmail.com
  12
  13 #ifndef BOOST_OPTIONAL_DETAIL_OPTIONAL_CONFIG_AJK_28JAN2015_HPP
  14 #define BOOST_OPTIONAL_DETAIL_OPTIONAL_CONFIG_AJK_28JAN2015_HPP
  15
  16 #include <boost/config.hpp>
  17 #include <boost/detail/workaround.hpp>
  18
  19 #if (defined BOOST_NO_CXX11_RVALUE_REFERENCES) || (defined BOOST_OPTIONAL_CONFIG_NO_RVALUE_REFERENCES)
  20 # define BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
  21 #endif
  22
  23 #if BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION,<=700)
  24 // AFAICT only Intel 7 correctly resolves the overload set
  25 // that includes the in-place factory taking functions,
  26 // so for the other icc versions, in-place factory support
  27 // is disabled
  28 # define BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT
  29 #endif
  30
  31 #if BOOST_WORKAROUND(__BORLANDC__, <= 0x551)
  32 // BCB (5.5.1) cannot parse the nested template struct in an inplace factory.
  33 # define BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT
  34 #endif
  35
  36 #if !defined(BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT) \
  37     && defined BOOST_BCB_PARTIAL_SPECIALIZATION_BUG
  38 // BCB (up to 5.64) has the following bug:
  39 //   If there is a member function/operator template of the form
  40 //     template<class Expr> mfunc( Expr expr ) ;
  41 //   some calls are resolved to this even if there are other better matches.
  42 //   The effect of this bug is that calls to converting ctors and assignments
  43 //   are incorrectly sink to this general catch-all member function template as shown above.
  44 # define BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION
  45 #endif
  46
  47 #if !defined(BOOST_NO_MAY_ALIAS)
  48 // GCC since 3.3 and some other compilers have may_alias attribute that helps to alleviate
  49 // optimizer issues with regard to violation of the strict aliasing rules. The optional< T >
  50 // storage type is marked with this attribute in order to let the compiler know that it will
  51 // alias objects of type T and silence compilation warnings.
  52 # define BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS
  53 #endif
  54
  55 #if (defined(_MSC_VER) && _MSC_VER <= 1800)
  56 // on MSCV 2013 and earlier an unwanted temporary is created when you assign from
  57 // a const lvalue of integral type. Thus we bind not to the original address but
  58 // to a temporary.
  59 # define BOOST_OPTIONAL_CONFIG_NO_PROPER_ASSIGN_FROM_CONST_INT
  60 #endif
  61
  62 #if (defined __GNUC__) && (!defined BOOST_INTEL_CXX_VERSION) && (!defined __clang__)
  63 // On some GCC versions an unwanted temporary is created when you copy-initialize
  64 // from a const lvalue of integral type. Thus we bind not to the original address but
  65 // to a temporary.
  66
  67 # if (__GNUC__ < 4)
  68 #  define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
  69 # endif
  70
  71 # if (__GNUC__ == 4 && __GNUC_MINOR__ <= 5)
  72 #  define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
  73 # endif
  74
  75 # if (__GNUC__ == 5 && __GNUC_MINOR__ < 2)
  76 #  define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
  77 # endif
  78
  79 # if (__GNUC__ == 5 && __GNUC_MINOR__ == 2 && __GNUC_PATCHLEVEL__ == 0)
  80 #  define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
  81 # endif
  82
  83 #endif // defined(__GNUC__)
  84
  85 #if (defined __GNUC__) && (!defined BOOST_NO_CXX11_RVALUE_REFERENCES)
  86 // On some initial rvalue reference implementations GCC does it in a strange way,
  87 // preferring perfect-forwarding constructor to implicit copy constructor.
  88
  89 # if (__GNUC__ == 4 && __GNUC_MINOR__ == 4)
  90 #  define BOOST_OPTIONAL_CONFIG_NO_LEGAL_CONVERT_FROM_REF
  91 # endif
  92
  93 # if (__GNUC__ == 4 && __GNUC_MINOR__ == 5)
  94 #  define BOOST_OPTIONAL_CONFIG_NO_LEGAL_CONVERT_FROM_REF
  95 # endif
  96
  97 #endif // defined(__GNUC__)
  98
  99 #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_DECLTYPE) && !BOOST_WORKAROUND(BOOST_MSVC, < 1800) && !BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40500) && !defined(__SUNPRO_CC)
 100   // this condition is a copy paste from is_constructible.hpp
 101   // I also disable SUNPRO, as it seems not to support type_traits correctly
 102 #else
 103 # define BOOST_OPTIONAL_DETAIL_NO_IS_CONSTRUCTIBLE_TRAIT
 104 #endif
 105
 106 #if defined __SUNPRO_CC
 107 # define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
 108 #elif (defined _MSC_FULL_VER) && (_MSC_FULL_VER < 190023026)
 109 # define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
 110 #elif defined BOOST_GCC && !defined BOOST_GCC_CXX11
 111 # define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
 112 #elif defined BOOST_GCC_VERSION && BOOST_GCC_VERSION < 40800
 113 # define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
 114 #endif
 115
 116
 117 // Detect suport for defaulting move operations
 118 // (some older compilers implement rvalue references,
 119 // defaulted funcitons but move operations are not special members and cannot be defaulted)
 120
 121 #ifdef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
 122 # define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
 123 #elif BOOST_WORKAROUND(BOOST_MSVC, < 1900)
 124 # define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
 125 #elif BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40600)
 126 # define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
 127 #endif
 128
 129
 130 #ifdef BOOST_OPTIONAL_CONFIG_NO_DIRECT_STORAGE_SPEC
 131 # define BOOST_OPTIONAL_DETAIL_NO_DIRECT_STORAGE_SPEC
 132 #endif
 133
 134
 135 #endif // header guard