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Added workaround for msvc-14.x

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This commit is contained in:
Kohei Takahashi
2018-04-19 00:21:41 +09:00
parent 757541f9d2
commit a273cd8131
3 changed files with 21 additions and 10 deletions
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14
include/boost/fusion/support/config.hpp
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@ -1,6 +1,6 @@
/*=============================================================================
Copyright (c) 2014 Eric Niebler
Copyright (c) 2014 Kohei Takahashi
Copyright (c) 2014,2018 Kohei Takahashi
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
@ -96,4 +96,16 @@ namespace std
#define BOOST_FUSION_CONSTEXPR_THIS BOOST_CONSTEXPR
#endif
// Workaround for compiler which doesn't compile decltype(expr)::type.
// It expects decltype(expr) deduced as mpl::identity<T>.
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1913))
# include <boost/mpl/identity.hpp>
# define BOOST_FUSION_IDENTIFIED_TYPE(parenthesized_expr) \
boost::mpl::identity<decltype parenthesized_expr>::type::type
#else
# define BOOST_FUSION_IDENTIFIED_TYPE(parenthesized_expr) \
decltype parenthesized_expr ::type
#endif
#endif