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#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#endif // header guard
117