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111
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1 // { dg-do compile { target c++11 } }
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2 // { dg-options "-ftrack-macro-expansion=0" }
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3
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4 #define SA(X) static_assert (X, #X)
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5
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6 struct A
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7 {
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8 int i;
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145
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9 constexpr A(int _i) { i = _i; } // { dg-error "empty body|A::i" "" { target c++17_down } }
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111
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10 };
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11
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12 template <class T>
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13 struct B
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14 {
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15 T t;
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16 constexpr B(T _t): t(_t) { }
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17 };
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18
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19 B<int> b(1); // { dg-message "not declared .constexpr" }
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20 SA(b.t==1); // { dg-error "non-constant condition|'b'" }
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21 constexpr B<int> b2(1);
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22 SA(b2.t==1);
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23
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24 template <class T>
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25 constexpr T f(T a, T b)
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26 {
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27 typedef T myT;
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28 return a + b;
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29 }
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30
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31 SA(f(1,2)==3);
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