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111
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1 // { dg-options "-std=c++17 -fconcepts" }
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2
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3 template<typename T>
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4 concept bool C() { return __is_class(T); }
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5
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6 template<int N>
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7 concept bool Int() { return true; }
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8
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9 template<template<typename> class X>
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10 concept bool Template() { return true; }
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11
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12 struct S { };
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13
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14 void f1(Int) { } // { dg-error "" }
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15 void f2(Template) { } // { dg-error "" }
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16
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17 struct S1 {
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18 void f1(auto x) { }
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19 void f2(C x) { }
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20
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21 void f3(auto x) { }
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22 void f3(C x) { }
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23 };
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24
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25 template<C T>
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26 struct S2 {
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27 void f1(auto x) { }
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28 void f2(C x) { }
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29
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30 void h1(auto x);
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31 void h2(C x);
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32
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33 template<C U>
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34 void g(T t, U u) { }
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35 };
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36
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37 int main() {
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38 S s;
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39
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40 S1 s1;
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41 s1.f2(0); // { dg-error "matching" }
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42
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43 S2<S> s2;
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44 s2.f2(0); // { dg-error "matching" }
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45 s2.h2(0); // { dg-error "matching" }
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46
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47 s2.g(s, 0); // { dg-error "matching" }
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48 s2.g(0, s); // { dg-error "matching" }
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49 }
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