forked from boostorg/fusion
2114bfca6c
Note 1: Forwarding functions are specified as a C++14 constexpr since std::forward is not a constexpr within C++11. Note 2: Though I'm not sure why it doesn't compile, some declarations are specified as a C++14 constexpr or non-constexpr. Note 3: Boost.Tuple adaptation and TR1-based tuple implementations are not constexpr.
31 lines
1.1 KiB
C++
31 lines
1.1 KiB
C++
/*=============================================================================
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Copyright (c) 2012 Nathan Ridge
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_FUSION_SUPPORT_AS_CONST_HPP
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#define BOOST_FUSION_SUPPORT_AS_CONST_HPP
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#include <boost/config.hpp>
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#include <boost/fusion/support/config.hpp>
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namespace boost { namespace fusion { namespace extension
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{
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// A customization point that allows certain wrappers around
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// Fusion sequence elements (e.g. adt_attribute_proxy) to be
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// unwrapped in contexts where the element only needs to be
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// read. The library wraps accesses to Fusion elements in
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// such contexts with calls to this function. Users can
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// specialize this function for their own wrappers.
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template <typename T>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline const T& as_const(const T& obj) BOOST_NOEXCEPT
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{
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return obj;
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}
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}}}
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#endif
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