1 // RUN: %clang_cc1 -verify %s 2 // expected-no-diagnostics 3 4 typedef char one_byte; 5 struct two_bytes { char data[2]; }; 6 7 template<typename T> one_byte __is_class_check(int T::*); 8 template<typename T> two_bytes __is_class_check(...); 9 10 template<typename T> struct is_class { 11 static const bool value = sizeof(__is_class_check<T>(0)) == 1; 12 }; 13 14 struct X { }; 15 16 int array0[is_class<X>::value? 1 : -1]; 17 int array1[is_class<int>::value? -1 : 1]; 18 int array2[is_class<char[3]>::value? -1 : 1]; 19 20 namespace 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
