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111
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1 // LWG2296 - addressof should be constexpr
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2 // { dg-do compile { target c++11 } }
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3
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4 template <typename T>
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5 constexpr inline T *
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6 addressof (T &x) noexcept
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7 {
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8 return __builtin_addressof (x);
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9 }
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10
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11 auto a = __builtin_addressof (1); // { dg-error "lvalue required as unary" }
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12 auto b = addressof (1); // { dg-error "cannot bind non-const lvalue reference of type" }
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13
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14 struct S { int s : 5; int t; void foo (); } s;
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15
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16 auto c = __builtin_addressof (s);
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17 auto d = addressof (s);
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18 auto e = __builtin_addressof (s.s); // { dg-error "attempt to take address of bit-field" }
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19 auto f = addressof (s.s); // { dg-error "cannot bind bitfield" }
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131
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20 auto g = __builtin_addressof (S{}); // { dg-error "taking address of rvalue" }
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111
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21 auto h = addressof (S{}); // { dg-error "cannot bind non-const lvalue reference of type" }
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22 auto i = __builtin_addressof (S::t); // { dg-error "invalid use of non-static data member" }
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23 auto j = __builtin_addressof (S::foo); // { dg-error "invalid use of non-static member function" }
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24
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25 void
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26 foo (bool b)
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27 {
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28 lab:;
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29 char c;
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30 long long int d;
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31 auto k = __builtin_addressof (lab); // { dg-error "was not declared in this scope" }
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32 auto l = __builtin_addressof (b ? c : d); // { dg-error "lvalue required as unary" }
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33 }
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