derek.holloway
7502bf64a4
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46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
// RUN: %clang_cc1 -std=c++2a -x c++ %s -verify
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template<typename...>
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concept C = false; // expected-note 9{{because}}
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template<typename T>
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struct S {
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template<typename U>
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static void foo1(U a, auto b);
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static void foo2(T a, C<T> auto b);
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// expected-note@-1{{candidate template ignored}} expected-note@-1{{because}}
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static void foo3(T a, C<decltype(a)> auto b);
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// expected-note@-1{{candidate template ignored}} expected-note@-1{{because}}
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static void foo4(T a, C<decltype(a)> auto b, const C<decltype(b)> auto &&c);
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// expected-note@-1{{candidate template ignored}} expected-note@-1{{because}}
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};
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using sf1 = decltype(S<int>::foo1(1, 2));
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using sf2 = decltype(S<int>::foo2(1, 2)); // expected-error{{no matching function}}
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using sf3 = decltype(S<int>::foo3(1, 2)); // expected-error{{no matching function}}
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using sf4 = decltype(S<int>::foo4(1, 2, 3)); // expected-error{{no matching function}}
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template<typename... T>
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struct G {
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static void foo1(auto a, const C<decltype(a)> auto &&... b);
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// expected-note@-1{{candidate template ignored}} expected-note@-1{{because}} expected-note@-1 3{{and}}
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static void foo2(auto a, const C<decltype(a), T> auto &&... b);
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// expected-note@-1{{candidate template ignored}} expected-note@-1{{because}} expected-note@-1{{and}}
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};
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using gf1 = decltype(G<int, char>::foo1('a', 1, 2, 3, 4)); // expected-error{{no matching function}}
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using gf2 = decltype(G<int, char>::foo2('a', 1, 2)); // expected-error{{no matching function}}
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// Regression (bug #45102): check that instantiation works where there is no
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// TemplateTypeParmDecl
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template <typename T> using id = T;
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template <typename T>
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constexpr void g() {
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id<void (T)> f;
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}
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static_assert((g<int>(), true)); |