Fix PR#32605: common_type<T> is not SFINAE-friendly
llvm-svn: 299901
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@ -1998,9 +1998,7 @@ struct _LIBCPP_TEMPLATE_VIS common_type {};
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template <class _Tp>
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struct _LIBCPP_TEMPLATE_VIS common_type<_Tp>
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{
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typedef typename common_type<_Tp, _Tp>::type type;
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};
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: public common_type<_Tp, _Tp> {};
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// bullet 3 - sizeof...(Tp) == 2
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@ -45,6 +45,8 @@ namespace std
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template <> struct common_type< ::S<long>, long> {};
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template <> struct common_type<long, ::S<long> > {};
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template <> struct common_type<::X<float> > {};
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template <> struct common_type<::X<double>, ::X<double> > {};
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}
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#if TEST_STD_VER >= 11
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@ -305,4 +307,6 @@ int main()
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static_assert((std::is_same<std::common_type<int, const int>::type, int>::value), "");
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static_assert((std::is_same<std::common_type<const int, const int>::type, int>::value), "");
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static_assert(no_common_type<X<float> >::value, "");
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static_assert(no_common_type<X<double> >::value, "");
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}
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