90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
// RUN: %clang_cc1 -std=c++2a -x c++ -verify %s
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namespace nodiag {
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template <typename T> requires (bool(T()))
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struct A;
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template <typename U> requires (bool(U()))
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struct A;
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template<typename T>
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concept C1 = true;
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template <C1 T> requires (bool(T()))
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struct B;
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template <C1 U> requires (bool(U()))
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struct B;
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} // end namespace nodiag
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namespace diag {
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template <typename T> requires true // expected-note{{previous template declaration is here}}
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struct A;
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template <typename T> struct A; // expected-error{{requires clause differs in template redeclaration}}
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template <typename T> struct B; // expected-note{{previous template declaration is here}}
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template <typename T> requires true // expected-error{{requires clause differs in template redeclaration}}
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struct B;
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template <typename T> requires true // expected-note{{previous template declaration is here}}
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struct C;
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template <typename T> requires (!0) // expected-error{{requires clause differs in template redeclaration}}
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struct C;
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template<typename T>
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concept C1 = true;
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template <C1 T> // expected-note{{previous template declaration is here}}
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struct D;
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template <typename T> requires C1<T> // expected-error{{type constraint differs in template redeclaration}}
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struct D;
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} // end namespace diag
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namespace nodiag {
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struct AA {
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template <typename T> requires (someFunc(T()))
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struct A;
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};
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template <typename U> requires (someFunc(U()))
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struct AA::A { };
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struct AAF {
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template <typename T> requires (someFunc(T()))
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friend struct AA::A;
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};
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} // end namespace nodiag
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namespace diag {
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template <unsigned N>
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struct TA {
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template <template <unsigned> class TT> requires TT<N>::happy // expected-note {{previous template declaration is here}}
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struct A;
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template <template <unsigned> class TT> requires TT<N>::happy // expected-note {{previous template declaration is here}}
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struct B;
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struct AF;
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};
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template <unsigned N>
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template <template <unsigned> class TT> struct TA<N>::A { }; // expected-error{{requires clause differs in template redeclaration}}
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template <unsigned N>
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template <template <unsigned> class TT> requires TT<N + 1>::happy struct TA<N>::B { }; // expected-error{{requires clause differs in template redeclaration}}
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template <unsigned N>
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struct TA<N>::AF {
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// we do not expect a diagnostic here because the template parameter list is dependent.
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template <template <unsigned> class TT> requires TT<N + 0>::happy
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friend struct TA::A;
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};
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} // end namespace diag
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