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145
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1 // { dg-do compile { target c++17_only } }
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131
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2 // { dg-options "-fconcepts" }
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111
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3
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4 template<typename T>
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145
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5 concept bool Type = true;
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6
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7 template<typename T, typename U>
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8 concept bool Same = __is_same_as(T, U);
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111
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9
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10 template<typename T, typename U>
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145
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11 concept bool C1 = true;
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12
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13 template<typename T, typename... Args>
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14 concept bool C2 = true;
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111
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15
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16 template<typename T, typename U>
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145
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17 concept bool C3 = __is_same_as(T, int) && __is_same_as(U, double);
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111
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18
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19 template<Same<int> T> struct S1 { };
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20 template<typename T, Same<T> U> struct S2 { };
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21
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145
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22 template<Same<int> Q>
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23 void f(Q q) { }
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24 template<Type A, Same<decltype(A{})> B>
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25 void g(A a, B b) { }
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111
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26
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145
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27 template<Same<int> A>
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28 void h0(A* a) { }
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29 template<C1<int> A>
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30 void h1(A* a) { }
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31 template<C2<char, short, int, long> A>
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32 void h2(A* a) { }
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33 template<C3<double> A>
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34 void h3(A* a) { }
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111
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35
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36 int main() {
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37 S1<int> s1;
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38 S2<int, int> s2;
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39 f(0);
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40 g(0, 1);
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41 h0((int*)0);
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42 h1((int*)0);
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145
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43 // h2((int*)0);
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44 h3((int*)0);
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111
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45 }
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