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)6 addressof (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)26 foo (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