// RUN: %clang_cc1 %s -verify=expected,noms -fsyntax-only -triple=x86_64-unknown-linux-gnu
// RUN: %clang_cc1 %s -verify=expected,noms -fsyntax-only -triple=x86_64-unknown-linux-gnu -std=c++20
// RUN: %clang_cc1 %s -verify=expected,ms -fms-extensions -fms-compatibility -triple=x86_64-pc-windows-msvc -DMS

// Verify that clang doesn't emit additional errors when searching for
// additional operators delete for vector deleting destructors support.

struct Foo {
  virtual ~Foo() {} // expected-error {{attempt to use a deleted function}}
  static void operator delete(void* ptr) = delete; // expected-note {{explicitly marked deleted here}}
};


struct Bar {
  virtual ~Bar() {}
  static void operator delete[](void* ptr) = delete;
};

struct Baz {
  virtual ~Baz() {}
  static void operator delete[](void* ptr) = delete; // expected-note {{explicitly marked deleted here}}
};

struct BarBaz {
  ~BarBaz() {}
  static void operator delete[](void* ptr) = delete;
};

void foobar() {
  Baz *B = new Baz[10]();
  delete [] B; // expected-error {{attempt to use a deleted function}}
  BarBaz *BB = new BarBaz[10]();
}

struct BaseDelete1 {
  void operator delete[](void *);
};
struct BaseDelete2 {
  void operator delete[](void *);
};
struct BaseDestructor {
  BaseDestructor() {}
  virtual ~BaseDestructor() = default;
};
struct Final : BaseDelete1, BaseDelete2, BaseDestructor {
  Final() {}
};
struct FinalExplicit : BaseDelete1, BaseDelete2, BaseDestructor {
  FinalExplicit() {}
  inline ~FinalExplicit() {}
};

#ifdef MS
struct Final1 : BaseDelete1, BaseDelete2, BaseDestructor {
  __declspec(dllexport) ~Final1() {}
};
#endif // MS

// Make sure there is no double diagnosing for declared-only destructors and
// new[].
struct DeclaredOnly {
  virtual ~DeclaredOnly(); // ms-error {{attempt to use a deleted function}}
  static void operator delete(void* ptr) = delete; // ms-note {{explicitly marked deleted here}}
};

struct DeclaredOnlyArr {
  virtual ~DeclaredOnlyArr();
  static void operator delete[](void* ptr) = delete;
};

void foo() {
    Final* a = new Final[10]();
    FinalExplicit* b = new FinalExplicit[10]();
    DeclaredOnly *d = new DeclaredOnly[5]();
    DeclaredOnlyArr *e = new DeclaredOnlyArr[5]();
}

// Make sure there is no double diagnosing for forward declared destructors
// and new[].
namespace std { struct destroying_delete_t {}; }
struct A {
  void operator delete(
      A*, //expected-error {{cannot cast 'D' to its private base class 'A'}}
      std::destroying_delete_t);
};
struct B : private A { using A::operator delete; }; //expected-note {{declared private here}}
struct D : B { virtual ~D(); }; //ms-note {{while checking implicit 'delete this' for virtual destructor}}
void f() { new D[5]; }
D::~D() {} // noms-note {{while checking implicit 'delete this' for virtual destructor}}