derek.holloway
7502bf64a4
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41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++20 %s
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template<class T>
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concept C = true;
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template<class T>
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concept D = C<T> && true;
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template<typename T>
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struct a {
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void no_candidate() requires(false) {}
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// expected-note@-1 {{candidate function not viable: constraints not satisfied}} \
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// expected-note@-1 {{because 'false' evaluated to false}}
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void no_candidate() requires(false && false) {}
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// expected-note@-1 {{candidate function not viable: constraints not satisfied}} \
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// expected-note@-1 {{because 'false' evaluated to false}}
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void subsumes();
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void subsumes() requires C<T>;
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void subsumes() requires D<T> {};
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void ok() requires false;
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void ok() requires true {};
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void ok2() requires false;
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void ok2(){};
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void ambiguous() requires true;
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// expected-note@-1 {{candidate function}}
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void ambiguous() requires C<T>;
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// expected-note@-1 {{candidate function}}
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};
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template void a<int>::no_candidate();
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// expected-error@-1 {{no viable candidate for explicit instantiation of 'no_candidate'}}
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template void a<int>::ambiguous();
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// expected-error@-1 {{partial ordering for explicit instantiation of 'ambiguous' is ambiguous}}
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template void a<int>::ok();
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template void a<int>::ok2();
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