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39 lines
1.0 KiB
39 lines
1.0 KiB
4 months ago
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// RUN: %clang_cc1 -std=c++2a -x c++ %s -verify
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template<typename T, int a>
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concept C1 = true;
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template<C1 T>
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// expected-error@-1 {{'C1' requires more than 1 template argument; provide the remaining arguments explicitly to use it here}}
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using badA = T[10];
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template<C1<0> T>
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using A = T[10];
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using a = A<int>;
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namespace ns {
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template<typename T, typename U, typename... X>
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concept C2 = true;
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}
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template<ns::C2 T1, ::ns::C2 T2>
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// expected-error@-1 2{{'C2' requires more than 1 template argument; provide the remaining arguments explicitly to use it here}}
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requires (sizeof(T1) <= sizeof(T2))
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struct badB { };
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template<ns::C2<int> T1, ::ns::C2<char, T1> T2>
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requires (sizeof(T1) <= sizeof(T2))
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struct B { };
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using b = B<int, int>;
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template<ns::C2... T1>
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// expected-error@-1 {{'C2' requires more than 1 template argument; provide the remaining arguments explicitly to use it here}}
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struct badC { };
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template<ns::C2<int>... T1>
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struct C { };
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using c1 = C<char, char, char>;
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using c2 = C<char, char, char, char>;
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