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

   1 // Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
   2 // Copyright (C) 2015 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(__GNUC__) && !defined(__INTEL_COMPILER)
  48 // GCC since 3.3 has may_alias attribute that helps to alleviate optimizer issues with
  49 // regard to violation of the strict aliasing rules. The optional< T > storage type is marked
  50 // with this attribute in order to let the compiler know that it will alias objects of type T
  51 // 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 #endif // header guard