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Tentative fix for msvc-10 issue with rvalue refs.

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See: https://svn.boost.org/trac10/ticket/5795 and https://github.com/boostorg/type_traits/issues/78.
This commit is contained in:
jzmaddock
2018-08-06 18:31:26 +01:00
parent 458b1fa071
commit 0c59e22982
3 changed files with 37 additions and 4 deletions
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30
include/boost/type_traits/detail/is_rvalue_reference_msvc10_fix.hpp Normal file
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@ -0,0 +1,30 @@
// (C) Copyright John Maddock 2018.
// Use, modification and distribution are subject to 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).
//
// See http://www.boost.org/libs/type_traits for most recent version including documentation.
#ifndef BOOST_TT_IS_RVALUE_REFERENCE_MSVC10_FIX_HPP_INCLUDED
#define BOOST_TT_IS_RVALUE_REFERENCE_MSVC10_FIX_HPP_INCLUDED
namespace boost {
template <class R> struct is_rvalue_reference<R(&&)()> : public true_type {};
template <class R> struct is_rvalue_reference<R(&&)(...)> : public true_type {};
template <class R, class Arg1> struct is_rvalue_reference<R(&&)(Arg1)> : public true_type {};
template <class R, class Arg1> struct is_rvalue_reference<R(&&)(Arg1, ...)> : public true_type {};
template <class R, class Arg1, class Arg2> struct is_rvalue_reference<R(&&)(Arg1, Arg2)> : public true_type {};
template <class R, class Arg1, class Arg2> struct is_rvalue_reference<R(&&)(Arg1, Arg2, ...)> : public true_type {};
template <class R, class Arg1, class Arg2, class Arg3> struct is_rvalue_reference<R(&&)(Arg1, Arg2, Arg3)> : public true_type {};
template <class R, class Arg1, class Arg2, class Arg3> struct is_rvalue_reference<R(&&)(Arg1, Arg2, Arg3, ...)> : public true_type {};
template <class R, class Arg1, class Arg2, class Arg3, class Arg4> struct is_rvalue_reference<R(&&)(Arg1, Arg2, Arg3, Arg4)> : public true_type {};
template <class R, class Arg1, class Arg2, class Arg3, class Arg4> struct is_rvalue_reference<R(&&)(Arg1, Arg2, Arg3, Arg4, ...)> : public true_type {};
template <class R, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5> struct is_rvalue_reference<R(&&)(Arg1, Arg2, Arg3, Arg4, Arg5)> : public true_type {};
template <class R, class Arg1, class Arg2, class Arg3, class Arg4, class Arg5> struct is_rvalue_reference<R(&&)(Arg1, Arg2, Arg3, Arg4, Arg5, ...)> : public true_type {};
} // namespace boost
#endif // BOOST_TT_IS_REFERENCE_HPP_INCLUDED

4
include/boost/type_traits/is_rvalue_reference.hpp
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@ -21,5 +21,9 @@ template <class T> struct is_rvalue_reference<T&&> : public true_type {};
} // namespace boost
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, <= 1700)
#include <boost/type_traits/detail/is_rvalue_reference_msvc10_fix.hpp>
#endif
#endif // BOOST_TT_IS_REFERENCE_HPP_INCLUDED

7
test/tricky_rvalue_test.cpp
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@ -19,20 +19,19 @@
TT_TEST_BEGIN(rvalue_reference_test)
#if !(defined(CI_SUPPRESS_KNOWN_ISSUES) && BOOST_WORKAROUND(BOOST_MSVC, <= 1700))
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_reference<int (&&)(int)>::value, true);
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_rvalue_reference<int (&)(int)>::value, false);
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_rvalue_reference<int (&&)(int)>::value, true);
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_rvalue_reference<int(&&)(int, ...)>::value, true);
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_rvalue_reference<void(&&)(void)>::value, true);
BOOST_CHECK_INTEGRAL_CONSTANT(::tt::is_rvalue_reference<void(&&)(int, double const&)>::value, true);
#if !(defined(CI_SUPPRESS_KNOWN_ISSUES) && BOOST_WORKAROUND(BOOST_GCC, < 40700))
BOOST_CHECK_INTEGRAL_CONSTANT((::tt::is_convertible<int&&, int&>::value), false);
BOOST_CHECK_INTEGRAL_CONSTANT((::tt::is_convertible<int(), int(&&)()>::value), true);
#endif
#endif
#endif
TT_TEST_END