1 // LWG2296 - addressof should be constexpr 2 // { dg-do compile { target c++11 } } 3 4 template <typename T> 5 constexpr inline T * addressof(T & x)6addressof (T &x) noexcept 7 { 8 return __builtin_addressof (x); 9 } 10 11 auto a = __builtin_addressof (1); // { dg-error "31:lvalue required as unary" } 12 auto b = addressof (1); // { dg-error "21:cannot bind non-const lvalue reference of type" } 13 14 struct S { int s : 5; int t; void foo (); } s; 15 16 auto c = __builtin_addressof (s); 17 auto d = addressof (s); 18 auto e = __builtin_addressof (s.s); // { dg-error "33:attempt to take address of bit-field" } 19 auto f = addressof (s.s); // { dg-error "23:cannot bind bit-field" } 20 auto g = __builtin_addressof (S{}); // { dg-error "31:taking address of rvalue" } 21 auto h = addressof (S{}); // { dg-error "21:cannot bind non-const lvalue reference of type" } 22 auto i = __builtin_addressof (S::t); // { dg-error "34:invalid use of non-static data member" } 23 auto j = __builtin_addressof (S::foo); // { dg-error "34:invalid use of non-static member function" } 24 25 void foo(bool b)26foo (bool b) 27 { 28 lab:; 29 char c; 30 long long int d; 31 auto k = __builtin_addressof (lab); // { dg-error "33:.lab. was not declared in this scope" } 32 auto l = __builtin_addressof (b ? c : d); // { dg-error "35:lvalue required as unary" } 33 } 34