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1// RUN: %clang_cc1 -verify %s2// expected-no-diagnostics3 4typedef char one_byte;5struct two_bytes { char data[2]; };6 7template<typename T> one_byte __is_class_check(int T::*);8template<typename T> two_bytes __is_class_check(...);9 10template<typename T> struct is_class {11  static const bool value = sizeof(__is_class_check<T>(0)) == 1;12};13 14struct X { };15 16int array0[is_class<X>::value? 1 : -1];17int array1[is_class<int>::value? -1 : 1];18int array2[is_class<char[3]>::value? -1 : 1];19 20namespace instantiation_order1 {21  template<typename T>22  struct it_is_a_trap { 23    typedef typename T::trap type;24  };25 26  template<bool, typename T = void>27  struct enable_if {28    typedef T type;29  };30 31  template<typename T>32  struct enable_if<false, T> { };33 34  template<typename T>35  typename enable_if<sizeof(T) == 17>::type 36  f(const T&, typename it_is_a_trap<T>::type* = 0);37 38  void f(...);39 40  void test_f() {41    f('a');42  }43}44