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