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Workaround for MSVC 12 variadics bug.

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This commit is contained in:
Kohei Takahashi
2016-10-29 21:29:26 +09:00
parent 5135b5109b
commit c158886591
1 changed files with 6 additions and 2 deletions
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8
include/boost/fusion/support/detail/and.hpp
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@ -20,7 +20,11 @@ namespace boost { namespace fusion { namespace detail {
template<typename ...T>
struct and_impl<integral_constant<T, true>...> : true_type {};
// This specialization is necessary to avoid MSVC-12 variadics bug.
template<bool ...Cond>
struct and_impl1 : and_impl<integral_constant<bool, Cond>...> {};
/* fusion::detail::and_ differs from mpl::and_ in the following ways:
- The empty set is valid and returns true
- A single element set is valid and returns the identity
@ -29,7 +33,7 @@ namespace boost { namespace fusion { namespace detail {
reduces instantations when returning true; the implementation is not
recursive. */
template<typename ...Cond>
struct and_ : and_impl<integral_constant<bool, Cond::value>...> {};
struct and_ : and_impl1<Cond::value...> {};
}}}
#endif // FUSION_AND_07152016_1625