52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
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// RUN: %clang_cc1 -std=c++2a -x c++ %s -verify
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namespace type
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{
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template<typename T>
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concept C1 = true;
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template<C1 T, C1 U = int>
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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, int a = 0>
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concept C2 = true;
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}
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template<ns::C2 T1, ::type::ns::C2 T2> 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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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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}
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namespace non_type
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{
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template<int v>
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concept C1 = true;
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template<C1 v, C1 u = 0> // expected-error{{expected a type}} // expected-note{{declared here}}
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// expected-error@-1 2{{concept named in type constraint is not a type concept}}
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// expected-error@-2 {{expected ',' or '>' in template-parameter-list}}
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int A = v; // expected-error{{'v' does not refer to a value}}
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}
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namespace temp
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{
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template<typename>
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struct test1 { }; // expected-note{{template is declared here}}
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template<template<typename> typename T>
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concept C1 = true;
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template<C1 TT, C1 UU = test1> // expected-error{{use of class template 'test1' requires template arguments}}
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// expected-error@-1 2{{concept named in type constraint is not a type concept}}
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using A = TT<int>; // expected-error{{expected ';' after alias declaration}}
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}
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