// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
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// Copyright (C) 2015 - 2017 Andrzej Krzemienski.
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//
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// Use, modification, and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/optional for documentation.
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//
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// You are welcome to contact the author at:
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// akrzemi1@gmail.com
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#ifndef BOOST_OPTIONAL_DETAIL_OPTIONAL_CONFIG_AJK_28JAN2015_HPP
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#define BOOST_OPTIONAL_DETAIL_OPTIONAL_CONFIG_AJK_28JAN2015_HPP
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#include <boost/config.hpp>
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#include <boost/detail/workaround.hpp>
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#if (defined BOOST_NO_CXX11_RVALUE_REFERENCES) || (defined BOOST_OPTIONAL_CONFIG_NO_RVALUE_REFERENCES)
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# define BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
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#endif
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#if BOOST_WORKAROUND(BOOST_INTEL_CXX_VERSION,<=700)
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// AFAICT only Intel 7 correctly resolves the overload set
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// that includes the in-place factory taking functions,
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// so for the other icc versions, in-place factory support
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// is disabled
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# define BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT
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#endif
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#if BOOST_WORKAROUND(BOOST_BORLANDC, <= 0x551)
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// BCB (5.5.1) cannot parse the nested template struct in an inplace factory.
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# define BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT
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#endif
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#if !defined(BOOST_OPTIONAL_NO_INPLACE_FACTORY_SUPPORT) \
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&& defined BOOST_BCB_PARTIAL_SPECIALIZATION_BUG
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// BCB (up to 5.64) has the following bug:
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// If there is a member function/operator template of the form
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// template<class Expr> mfunc( Expr expr ) ;
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// some calls are resolved to this even if there are other better matches.
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// The effect of this bug is that calls to converting ctors and assignments
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// are incorrectly sink to this general catch-all member function template as shown above.
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# define BOOST_OPTIONAL_WEAK_OVERLOAD_RESOLUTION
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#endif
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#if !defined(BOOST_NO_MAY_ALIAS)
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// GCC since 3.3 and some other compilers have may_alias attribute that helps to alleviate
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// optimizer issues with regard to violation of the strict aliasing rules. The optional< T >
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// storage type is marked with this attribute in order to let the compiler know that it will
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// alias objects of type T and silence compilation warnings.
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# define BOOST_OPTIONAL_DETAIL_USE_ATTRIBUTE_MAY_ALIAS
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#endif
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#if (defined(_MSC_VER) && _MSC_VER <= 1800)
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// on MSCV 2013 and earlier an unwanted temporary is created when you assign from
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// a const lvalue of integral type. Thus we bind not to the original address but
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// to a temporary.
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# define BOOST_OPTIONAL_CONFIG_NO_PROPER_ASSIGN_FROM_CONST_INT
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#endif
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#if (defined __GNUC__) && (!defined BOOST_INTEL_CXX_VERSION) && (!defined __clang__)
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// On some GCC versions an unwanted temporary is created when you copy-initialize
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// from a const lvalue of integral type. Thus we bind not to the original address but
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// to a temporary.
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# if (__GNUC__ < 4)
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# define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
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# endif
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# if (__GNUC__ == 4 && __GNUC_MINOR__ <= 5)
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# define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
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# endif
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# if (__GNUC__ == 5 && __GNUC_MINOR__ < 2)
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# define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
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# endif
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# if (__GNUC__ == 5 && __GNUC_MINOR__ == 2 && __GNUC_PATCHLEVEL__ == 0)
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# define BOOST_OPTIONAL_CONFIG_NO_PROPER_CONVERT_FROM_CONST_INT
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# endif
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#endif // defined(__GNUC__)
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#if (defined __GNUC__) && (!defined BOOST_NO_CXX11_RVALUE_REFERENCES)
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// On some initial rvalue reference implementations GCC does it in a strange way,
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// preferring perfect-forwarding constructor to implicit copy constructor.
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# if (__GNUC__ == 4 && __GNUC_MINOR__ == 4)
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# define BOOST_OPTIONAL_CONFIG_NO_LEGAL_CONVERT_FROM_REF
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# endif
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# if (__GNUC__ == 4 && __GNUC_MINOR__ == 5)
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# define BOOST_OPTIONAL_CONFIG_NO_LEGAL_CONVERT_FROM_REF
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# endif
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#endif // defined(__GNUC__)
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#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)
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// this condition is a copy paste from is_constructible.hpp
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// I also disable SUNPRO, as it seems not to support type_traits correctly
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#else
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# define BOOST_OPTIONAL_DETAIL_NO_IS_CONSTRUCTIBLE_TRAIT
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#endif
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#if defined __SUNPRO_CC
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# define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
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#elif (defined _MSC_FULL_VER) && (_MSC_FULL_VER < 190023026)
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# define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
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#elif defined BOOST_GCC && !defined BOOST_GCC_CXX11
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# define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
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#elif defined BOOST_GCC_VERSION && BOOST_GCC_VERSION < 40800
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# define BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS
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#endif
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// Detect suport for defaulting move operations
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// (some older compilers implement rvalue references,
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// defaulted funcitons but move operations are not special members and cannot be defaulted)
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#ifdef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS
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# define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
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#elif BOOST_WORKAROUND(BOOST_MSVC, < 1900)
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# define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
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#elif BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40600)
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# define BOOST_OPTIONAL_DETAIL_NO_DEFAULTED_MOVE_FUNCTIONS
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#endif
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#ifdef BOOST_OPTIONAL_CONFIG_NO_DIRECT_STORAGE_SPEC
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# define BOOST_OPTIONAL_DETAIL_NO_DIRECT_STORAGE_SPEC
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#endif
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#endif // header guard
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