diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/cpp0x/sfinae4.C')
-rw-r--r-- | gcc/testsuite/g++.dg/cpp0x/sfinae4.C | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp0x/sfinae4.C b/gcc/testsuite/g++.dg/cpp0x/sfinae4.C new file mode 100644 index 000000000..b66483124 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/sfinae4.C @@ -0,0 +1,23 @@ +// { dg-options -std=c++0x } + +namespace std { template <class T> T&& declval(); } + +template<typename _Tp, typename... _Args> + class is_constructible_mini + { + typedef char __one; + typedef struct { char __arr[2]; } __two; + + template<typename _Tp1, typename... _Args1> + static decltype(::new _Tp1(std::declval<_Args1>()...), __one()) + __test(int); + + template<typename, typename...> + static __two __test(...); + + public: + static const bool value = sizeof(__test<_Tp, _Args...>(0)) == 1; + }; + +static_assert( !is_constructible_mini<int[], int>::value, ""); +static_assert( !is_constructible_mini<void, int>::value, ""); |