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TheRock/compiler/amd-llvm/clang/test/CXX/temp/temp.constr/temp.constr.decl/class-template-decl.cpp
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

90 lines
2.4 KiB
C++

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