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SFINAE expression obstructs compile on MSVC 8.

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This commit is contained in:
Kohei Takahashi
2015-11-13 21:49:27 +09:00
parent 0c18e85ecd
commit 7cf404d096
1 changed files with 9 additions and 2 deletions
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11
include/boost/fusion/algorithm/iteration/detail/fold.hpp
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@ -42,6 +42,12 @@
# define BOOST_FUSION_FOLD_IMPL_INVOKE_IT_TRANSFORM(IT) fusion::deref(IT)
#endif
#if BOOST_WORKAROUND(BOOST_MSVC, < 1500)
# define BOOST_FUSION_FOLD_IMPL_ENABLER(T) void
#else
# define BOOST_FUSION_FOLD_IMPL_ENABLER(T) typename T::type
#endif
namespace boost { namespace fusion
{
namespace detail
@ -57,7 +63,7 @@ namespace boost { namespace fusion
template<typename It, typename State, typename F>
struct BOOST_PP_CAT(result_of_it_,BOOST_FUSION_FOLD_NAME)<0,It,State,F
, typename boost::enable_if_has_type<typename State::type>::type
, typename boost::enable_if_has_type<BOOST_FUSION_FOLD_IMPL_ENABLER(State)>::type
#if BOOST_WORKAROUND(BOOST_MSVC, < 1500)
, true
#endif
@ -75,7 +81,7 @@ namespace boost { namespace fusion
// workaround won't work with MSVC 9.
typename boost::disable_if_c<SeqSize == 0, State>::type::type
#else
typename State::type
BOOST_FUSION_FOLD_IMPL_ENABLER(State)
#endif
>::type
#if BOOST_WORKAROUND(BOOST_MSVC, < 1500)
@ -236,6 +242,7 @@ namespace boost { namespace fusion
}}
#undef BOOST_FUSION_FOLD_NAME
#undef BOOST_FUSION_FOLD_IMPL_ENABLER
#undef BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION
#undef BOOST_FUSION_FOLD_IMPL_NEXT_IT_FUNCTION
#undef BOOST_FUSION_FOLD_IMPL_FIRST_IT_META_TRANSFORM